Abstract: The invention relates to the field of dish washing machines, and discloses a heat pump type dish washing machine which comprises an inner container, a washing circulating water path system, a heat pump system and a heating circulating water path system The heating circulating water path system comprises a circulating pump and a circulating pipeline The circulating pump can pump washing liquid atthe bottom of a containing cavity of the inner container and make the washing liquid circulate through a circulating pipeline and flow back to the bottom of the containing cavity The circulating pipeline at least partly serves as a heat absorption medium conveying pipe of a condenser in the heat pump system When flowing through the heat absorption medium conveying pipe, the washing liquid can exchange heat with a cold medium flowing through a cold medium conveying pipe of the condenser According to the heat pump type dish washing machine, the washing liquid does not need to flow through the heating circulating water path system when not needing to be heated, and the dish washing machine can be conveniently set to have high heat exchange efficiency and low energy consumption

Abstract: The utility model discloses a power battery thermal management system with thermal runaway inhibitory action, including the battery box, a controller, a heat exchanger, the circulating pump, inlet tube and outlet pipe, be provided with the cooling tube between the internal adjacent two sets of batteries of battery box, the entrance point and the inlet tube of cooling tube are linked together, butthe exit end of pipe is linked together with the outlet pipe, heat exchanger and circulating pump are established ties and outlet pipe mutually, the inlet tube is linked together, characteristics arethe internal fixed temperature sensor that are provided with of battery box, it has phase change material to pack between battery box and the battery, be provided with flow control valve on the inlettube, it is provided with the liquid reserve tank to correspond respectively on the every cooling tube, the storage has endothermic material in the liquid reserve tank, be provided with the solenoid valve on the communicating pipe of liquid reserve tank and cooling tube, the solenoid valve, flow control valve, temperature sensor is connected with the controller electricity respectively, the advantage is when power battery takes place the thermal runaway, can reduce power battery's temperature in the short time by a wide margin, blocks the propagation of thermal runaway.

Abstract: The invention relates to the field of geotechnical engineering model tests, and aims to provide a three-dimensional visualization testing device and method for particle seepage migration based on a trace method. A model casing of the device comprises an upstream liquid level tank, a downstream liquid outlet tank and a model landfill tank; transparent soil particles doped with trace particles inside the model landfill tank is prepared into a dam foundation model, and a dam foundation model is piled and formed at the upper part; and a water bath circulating system consists of a circulating pump,a water bath box, a buffer tank and a plurality of pipelines. The device also comprises the water bath circulating system consisting of the circulating pump, the water bath box, the buffer tank and the pipelines, and a loop is formed by the model box, the buffer tank and the water bath box; and at least two groups of CCD cameras connected to a computer through signal lines respectively are arranged on two sides of the model box respectively. The device effectively solves the problems that a traditional trace particle method is difficult to apply with transparent soil model tests, the occurrence position of particle migration is difficult to capture, the hole fluid refractive index and the glutinousness can change along with temperature and a hole fluid is circulated.

Abstract: The invention discloses a waterproof pipe drilling device with a cooling effect. The waterproof pipe drilling device comprises a supporting bottom plate. A circulating pump, a supporting column and acutting fluid storage box are installed on the top end face of the supporting bottom plate. A guide pipe is connected between the circulating pump and the cutting fluid storage box. A liquid outlet pipe is fixed to the top end of the circulating pump. One end of the liquid outlet pipe penetrates the supporting column. A spray nozzle is installed at one end of a corrosion-resistant hose. A supporting top plate is installed at the top end of the supporting column. A forward and backward rotation motor is installed at the top end of the supporting top plate. A lifting threaded rod is connected tothe output end of the forward and backward rotation motor. A polishing column is installed at one end of the lifting threaded rod. A drill bit is installed at one end of the polishing column. A top cover is installed at the top end of the cutting fluid storage box. Two clamps are installed on a machining table. The circulating pump sprays cutting fluid in the cutting fluid storage box to the drilling position from the spray nozzle, the cooling and dust falling effects are achieved, and meanwhile the cutting fluid can be used again.

Abstract: The invention provides a circulating medical apparatus cleaning device. The device is characterized by comprising a cleaning device, a spiral transmission device, a rinsing and drying device and a purifying device. The device is reasonable in design, the device utilizes cavitation effects, and cleaning effects are better; the rinsing and drying device is provided with an upper serpentine tube anda lower serpentine tube, the upper portion and the lower portion of a medical apparatus can simultaneously be cleaned, and the cleaning effects are improved; a blower device is provided with a hot airblower and an ultraviolet lamp tube, the hot air blower is used for shortening the drying time of the medical apparatus, and the ultraviolet lamp tube further improves the aseptic cleanliness of themedical apparatus; the device is further provided with the purifying device, filtered cleaning liquid is circularly pumped into a cleaning tank through a return pipe and a circulating pump, the cyclicutilization of the cleaning liquid is achieved, and waste of resources is avoided.

Abstract: The invention discloses a gas-fired heat-supply water heater and a control method thereof. The gas-fired heat-supply water heater comprises a heater body, a main heat exchanger, a plate heat exchanger, a heat supply pipeline, a bath pipeline, an internal circulation pipeline, a heat supply circulating pump and a master controller. The main heat exchanger, the plate heat exchanger, the heat supplypipeline, the bath pipeline, the internal circulation pipeline, the heat supply circulating pump and the master controller are mounted in the heater body. The heat supply pipeline is connected with the main heat exchanger; the bath pipeline is connected with the plate heat exchanger; the heat supply pipeline and the plate heat exchanger are connected through the internal circulation pipeline to form a small heat supply circuit for heating bath water; the heat supply circulating pump is mounted on the heat supply pipeline and connected with the master controller. The gas-fired heat-supply waterheater is characterized in that the heat supply circulating pump is a variable-frequency water pump. The internal circulation pipeline is directly connected with the heat supply pipeline, and a firstelectric two-way valve is arranged on the internal circulation pipeline. Heat supply and hot water supply functions of the gas-fired heat-supply water heater are realized simultaneously.

Abstract: The invention discloses an intelligent constant-temperature saving type faucet. The faucet comprises an electric adjusting butterfly valve, a temperature sensor, a cold water pipe, a cold water electromagnetic valve, a hot water pipe, a hot water electromagnetic valve, a circulating water pipe, a circulating pump and a thermal infrared human body inductor, wherein the cold water electromagnetic valve is arranged on the inner part of the cold water pipe, the hot water electromagnetic valve is arranged on the inner part of the hot water pipe, the circulating water pipe is arranged at the bottomends of the cold water pipe and the hot water pipe, a circulating pump is fixedly mounted on the circulating water pipe, and a micro-display screen is arranged on the surface of a console. The intelligent constant-temperature saving type faucet is scientific and convenient in structure and safe and convenient to use; by arranging the cold water electromagnetic valve and the hot water electromagnetic valve, the constant-temperature control and the accurate adjustment can be realized; by arranging the circulating water pipe and the circulating pump, cold water can be conveniently sent back to awater heater to be heated, the wasting caused due to the discharging of the cold water is avoided, and the water resource is saved; by arranging the thermal infrared human body inductor, the faucet iscapable of effectively detecting whether people is around, so that the wasting of the water resource caused when no people is around; and by arranging a water source single chip microcomputer, a single chip microcomputer I/O interface, a driving circuit and a relay, the convenient management and control are realized.

Abstract: The invention relates to an ultramicro bubble liquid generation device and belongs to the technical field of mixed operation of general physical or chemical methods or devices. The device comprises acirculating pump and a gas-liquid mixing unit, wherein the circulating pump is sequentially in serial communication with a liquid inlet and a liquid outlet of the gas-liquid mixing unit through pipelines to form a circulating loop, and a liquid inlet pipe and a liquid outlet pipe are further externally connected to the pipelines; the gas-liquid mixing unit comprises a sealed pressure bearing shellbody and a diaphragm, the sealed pressure bearing shell body is provided with a gas inlet and a liquid inlet/outlet, the sealed pressure bearing shell body is divided into two independent chambers ofa gas inlet chamber and a gas-liquid mixing chamber by the diaphragm, the gas-liquid mixing chamber is communicated with the circulating loop through the liquid inlet/outlet, the gas inlet chamber iscommunicated with an external gas source through the gas inlet, the hydrophobic supporting layer side of the diaphragm faces the gas-liquid mixing chamber, and a compact surface layer of the diaphragm faces the gas inlet chamber. The device can prevent a dissolution concentration of ultramicro bubbles in water from attenuating, and the ultramicro bubbles in the water can keep the sufficient amount for a long time and cannot be broken and disappear.

Abstract: The invention discloses a computer case with an efficient heat dissipation function. A heat dissipation hole is formed in a case body; a filter screen is mounted on the heat dissipation hole; an ash removal device is used for clearing the filter screen; the ash removal device comprises a first motor, a swing guide rod mechanism and a cleaning brush; the first motor is connected with a crank in theswing guide rod mechanism; the cleaning brush is mounted at the free end of a guide rod in the swing guide rod mechanism, and the cleaning brush abuts against the filter screen; an air cooling devicecomprises a fan; the fan is mounted in the case body; a condensing pipe of a water cooling device is positioned in the case body; and a circulating pump is mounted on a guide flow pipe and is used for driving cooling liquid to circularly flow. The computer case with the efficient heat dissipation function, disclosed by the invention, has the advantages that computer components in the case are cooled through the air cooling device and the water cooling device, thereby ensuring stable and normal operation of the computer components; and the ash removal device is used for clearing the filter screen on the heat dissipation hole to ensure that the filter screen is unobstructed in real time so as to guarantee that air smoothly circulates in the case, thereby improving the heat dissipation effect of a computer.

Abstract: The invention discloses a gas use peak adjusting method for a heating system. The heating system comprises a heating loop, a heat storage loop and a heat release loop; a gas boiler, a second electrictwo-way valve, a heat storage tank, a heat storage circulating pump and a first electric two-way valve are arranged on the heat storage loop in sequence according to a fluid circulating direction; a heat storage tank, a heat storage circulating pump, a third electric two-way valve and a heat exchanger are arranged on the heat release loop in sequence according to a fluid circulating direction; a primary side of the heat exchanger is connected to the heat release loop; and a secondary side of the heat exchanger is connected with the gas boiler in parallel. The method comprises the following steps: in the gas use valley period, the heat storage tank stores redundant heat generated by the gas boiler; and in the gas use peak period, the heat storage tank releases the heat to the heat exchanger, and the heat exchanger and the gas boiler provide the heat to a heat exchange unit together to reduce the gas use demands of the gas boiler. The gas use demands in the gas use peak period of naturalgas in cities can be greatly reduced.

Abstract: The utility model discloses a die and mold cleaner, the intelligent cabinet temperature adjusting device comprises a cabinet body, liquid distributor and electric telescopic handle are installed to the internal portion's upside of cabinet, install the shower nozzle on the liquid distributor, the electric telescopic handle lower extreme is provided with the mounting panel, install the motor on themounting panel, the output of motor passes through shaft coupling and pivot connection, installs the brush roller in the pivot, drying duct, protection casing and hydraulic telescoping rod are installed to the internal wall both sides of cabinet, the stripper plate is installed to hydraulic telescoping rod one end, the baffle is installed to cabinet body lower part, the collecting pit is installedto the baffle below, the collecting pit passes through the connecting pipe and waste liquid collecting tank connects, collecting pit internally mounted has the filter screen, the heating piece is installed to waste liquid collecting tank inner wall both sides, waste liquid collecting tank passes through the circulating pipe and the liquid distributor is connected, install the circulating pump onthe circulating pipe. The utility model discloses a heating piece is the ceramic heater piece, can realize having improved the cleaning performance to the heating of solution.

Abstract: The invention discloses a spinning device with a dust suction hood. The spinning device with the dust suction hood comprises a spinning device body and the dust suction hood. The two sides of the topend of the spinning device body are fixedly connected with electric sliding rails; auxiliary rails are arranged at the top ends of the electric sliding rails; the top ends of the auxiliary rails are fixedly connected with the bottom end of the dust suction hood; the top end of the dust suction hood is fixedly connected with an air blower mounting base through bolts; an air blower is fixedly arranged at the top end of the air blower mounting base; and an air suction opening of the air blower is fixedly connected with one end of an air suction pipe. According to the spinning device with the dustsuction hood, the dust suction hood can be conveniently moved to the position needing dust suction through the electric guide rails, the height of a brush can be adjusted through an electric telescopic rod so that the surface of the spinning device body can be cleaned, dust can be discharged into a processing tank through the air blower and subjected to sprinkling through spray nozzles, a filterplate can filter out cotton fibers in the dust, a quartz sand adsorption layer can adsorb the dust in water, and water can be reused through a circulating pump and sprinkled to the dust circularly.

Abstract: The utility model discloses a movable is switch board for electromechanics with automatically function of dispelling heat, including shell, electricity distribution room, cooling chamber, solar paneland universal wheel, be provided with electricity distribution room in the shell, the electricity distribution room right -hand member is provided with the gas outlet, and the electricity distributionroom left end is provided with inlet port A, the electricity distribution room left end is provided with the cooling chamber, cooling chamber fixedly connected with fixed plate, and the fixed plate right side is provided with the fly leaf, be provided with inlet port B on the fly leaf, be provided with the wedge in the inlet port B, the fixed plate right side is provided with the air -blower, andthe air -blower lower extreme is provided with the water tank, the water tank left end is provided with circulation mechanism, and circulation mechanism includes cooler, circulating pipe and circulating pump, shell upper end symmetry is provided with electric telescopic handle, and the electric telescopic handle top is provided with solar panel The utility model discloses simple structure can realize automatic heat dissipation, and cooling rate is fast, and resources are saved can remain electricity distribution room throughout and be in under the dry environment

Abstract: The utility model discloses a flowmeter calibrating device, include: fluid storage container (101) for the fluid of transport is treated in the storage, circulating pump (102), fluid coupling to fluidstorage container (101) for fluid in the pump sending fluid storage container (101), filter (103), fluid coupling to circulating pump (102) for the filtration is by the fluid of circulating pump (102) pump sending, and flowmeter (104), fluid coupling to filter (103) for the measurement is by the filterable fluidic velocity of flow of filter (103), and wherein, flowmeter (104) electricity is connected to circulating pump (102), and when the measuring velocity of flow was less than the threshold value, circulating pump (102) were closed in flowmeter (104) The utility model provides a circulating pump because unable normal pump sending fluid and idle running for a long time and impaired technical problem

Abstract: The invention provides a charging pile with a cable cooling function. The charging pile comprises a charging pile shell, a power supply, a charging module, a charging cable and a cooling unit. According to the working process of the charging pile, cooling liquid in a primary power cable cooling cavity is conveyed by a circulating pump through a liquid outlet pipe into a cooler to be cooled, the cooled cooling liquid returns to the cable cooling cable through the liquid inlet pipe after flow is adjusted through a temperature control valve, and this cycle is repeated till a primary power cable is cooled. A cooling draught fan drives outdoor air to enter the charging pile shell through an air inlet I to cool the charging module, then enter the cooler through an air inlet II to bring away theheat of the cooling liquid and is finally exhausted through an air outlet. If the cable temperature is still high, the charging module can control an air inlet III to be opened, bypass part of the outdoor air directly cools the cooler, and the cable cooling effect is enhanced. A charging pile body and the charging cable can be cooled at the same time, and the charging pile has the advantages of being good in cooling effect, compact in structure and convenient to maintain.

Abstract: The invention discloses a constant pressure, liquid injection and liquid discharge integrated multifunctional device of a cooling liquid circulation system. The constant pressure, liquid injection andliquid discharge integrated multifunctional device comprises first and second self-sealing quick connectors, first and second electric two-way valves, first and second ball valves, first and second electric three-way valves, first and second check valves, a circulating pump, first and second filters, a self-priming pump, a liquid storage tank, a solution source tank and a circulating liquid tankof the cooling liquid circulation system, which respectively form a constant pressure circulation system, a liquid injection circulation system and a liquid discharge circulation system. The constantpressure, liquid injection and liquid discharge integrated multifunctional device achieve on and off by applying the electric two-way valves, achieve direction switching control through the electric three-way valves and integrates the multiple functions of constant pressure, liquid injection and liquid discharge of the cooling liquid circulation system.

Abstract: The invention relates to a device for efficiently getting water, eliminating white smoke and cooperatively removing contaminants and a working method for the device. The device comprises a draught fan, a deep waste heat recycling system, a desulfurization system, an efficient condensing and water-getting system, a smoker re-heating and white smoke eliminating system, a chimney and a heat medium water circulating pump, wherein the efficient condensing and water-taking system comprises a condensing and water-getting heat exchange system, a condensing water circulating pump and a mechanical ventilating cooling tower; the condensing and water-getting heat exchange system is arranged at an outlet flue of the desulfurization system; the condensing and water-taking heat exchange system is connected with the condensing water circulating pump; the condensing water circulating pump is connected with the mechanical ventilating cooling tower; the condensing and water-taking heat exchange system isconnected with the mechanical ventilating cooling tower; the deep waste heat recycling system is connected with the heat medium water circulating pump; the heat medium water circulating pump is connected with the smoker re-heating and white smoke eliminating system; and the deep waste heat recycling system is connected with the smoker re-heating and white smoke eliminating system. The device is used for recycling a great deal of water in smoke, greatly saves water consumption amount of the desulfurization system, eliminates visual pollution of white smoke plume, and effectively reduces anti-corrosion grade of the chimney.

Abstract: The invention discloses a methyl alcohol heater. The methyl alcohol heater comprises a machine body, wherein an air inlet is formed in one end of the machine body; a pre-combustion chamber is arrangedat the other end of the machine body; the pre-combustion chamber is arranged in a heat exchanger, and communicates with a main combustion chamber in the heat exchanger; an air exhaust hoe is formed in the heat exchanger; a heat exchange medium outlet of the heat exchanger is connected with a heating medium inlet of a radiator in a car; a heat exchange medium inlet of the heat exchanger is connected with one end of a circulating pump; the other end of the circulating pump is connected with a heating medium outlet of the radiator in the car; a fuel pump used for providing methyl alcohol is arranged between a position, at the air inlet, in the machine body and a pre-combustion chamber; a liquid outlet end of the fuel pump is connected with a spray nozzle; and an ignition electrode is arranged on a position, close to the spray nozzle, in the machine body. The methyl alcohol heater does not affect vehicle endurance mileage, is simple and compact in structure, and has the characteristics ofbeing sufficient in combustion and good in environment friendliness; and according to a test, content of emission pollutants of the methyl alcohol heater is only 1/3-1/2 that of the fuel oil heater,so that smoke is not generated during starting and stopping.

Abstract: The invention provides a multi-grinding-disk curved surface polishing machine which mainly comprises an upper disk lifting mechanism and an upper disk transmission mechanism which are used for drivingan upper disk, and a lower disk transmission mechanism for driving a lower disk, wherein the lower disk is located in a pedestal; the multi-grinding-disk curved surface polishing machine further comprises a water tank and a circulating pump which are located on one side of the pedestal; multiple grinding disks are distributed below the upper disk; all the grinding disks are of up-and-down structures consisting of partitioning slots and brush disks; the upper disk transmission mechanism comprises a main gear driven by a motor, driven gears jointed with all the grinding disks, and transitionalgears acting on the driven gears; the driven gears are connected with the partitioning slots through internally-hollowed transmission shafts; and the circulating pump is connected above the transmission shafts through liquid guide pipes. According to the multi-grinding-disk curved surface polishing machine, by virtue of the particularity of a curved surface workpiece, the problems of low polishingprecision, low efficiency, low quality and the like of the curved surface workpiece are solved by improving a transmission structure, the brush disks and a workpiece template.

Abstract: A liquid hydrogen storing and fueling station is used for filling a hydrogen storage bottle (pot) with a hydrogen fuel. The hydrogen fueling station comprises: a liquid hydrogen container used for carrying out low-pressure storage on the hydrogen fuel in a liquid form; a liquid hydrogen pump used for pressurized transportation of the low-pressure liquid hydrogen in the liquid hydrogen container toa vaporizer driving device; a vaporizer used for converting the hydrogen fuel to a gas phase from a liquid phase in order to realize the output of high-pressure hydrogen; a gas buffering bottle beinga high-pressure hydrogen buffering and temporary-storage device; a hydrogen charger used for filling the hydrogen storage bottle (pot) with hydrogen and being a special apparatus provided with a metering device; a heat exchanger and a circulating pump which are used for transmitting cold energy generated in the liquid hydrogen vaporizing process to hydrogen through a refrigerant in order to realize reduction of the hydrogen temperature; and a high-pressure liquid hydrogen charger and a low-pressure liquid hydrogen charger which are used for filling the different liquid storage bottles (pots)with high-pressure liquid hydrogen and low-pressure liquid hydrogen and are special apparatus with metering devices.

Abstract: The invention relates to the field of water heaters, in particular to an automatic-preheating cold-water-avoiding water heater. The automatic-preheating cold-water-avoiding water heater comprises a water heater body, a heat exchange device, an internal water inlet pipeline, a water inlet connector, an internal water outlet pipeline, a water outlet connector, a preheating circulating pump, a circulating pump controller, a wireless signal receiver and a water outlet terminal controller. By coordinative operation of the water outlet terminal controller and the preheating circulating pump, automatic preheating of cold water in a water heater pipeline can be realized in water consumption at a terminal water outlet, then hot water at an appropriate temperature flows out of the terminal water outlet after preheating, and accordingly user experience is improved, and water resource saving and user cost reduction are realized.

Abstract: The utility model discloses an integration biological deodorization processing apparatus, this processing apparatus be including integration biological deodorization tower, and by a supreme album liquid aeration tank, gas distribution device, biological washing spray set, biofiltration packing layer and the nutrient solution spray set of being equipped with in proper order down in the tower, nutritious liquid and biofilm carrier in the collection liquid aeration tank, biological washing spray set and nutrient solution spray set circulating pipe and circulating pump and the collection liquid aeration tank through the peripheral hardware meets, and top of the tower portion is equipped with the gas vent. The utility model discloses an integrateed advantage of technologies such as biological aerated pond method, biological washing method and biofiltration method of processing apparatus has improved the treatment effeciency to the foul gas, reaches the deodorant purpose of high -efficiencybiological, has simultaneously that the aeration is effectual, resistance impact load capacity strong, degradation is fast, odor -removal effect good, the reaction accuracy is adjusted in the automatic control, area is little, the running cost is low and does not have characteristics such as secondary pollution.

Abstract: The utility model provides a fuel cell system hydrogen supply device, it makes gas pass through through set up the check valve in the peripheral passage at hydrogen circulating pump place the peripheral passage is from exhaust pipe flow direction air inlet pipeline, avoided the hydrogen circulating pump can not the during operation when freezing the phenomenon (break down, damage or be less than the freezing point as external environment temperature like the hydrogen circulating pump, take place the rotor) gas of taking place cross the refluence phenomenon that the peripheral passage directlyflowed to exhaust pipe from the pipeline through that admits air, reduced the waste of hydrogen, improved the utilization ratio of hydrogen and the chemical reaction quality of pile. Simultaneously, because the setting of check valve, can be through closing the hydrogen circulating pump, utilize the hydrogen atmospheric pressure sensor of the hydrogen inlet department of installing at the pile, judge through detect the undulant of pressure to it, realize the failure diagnosis to the solenoid valve.

Abstract: A cryo-concentration tower comprises a tower body and a circulating and spraying device. The tower body is a cylinder with an opening at the upper end, a material tank is arranged at the bottom of thetower body, and a circle of air incoming holes are arranged in the tower wall above the material tank. An exhaust fan is mounted at an upper port of the tower body, and exhaust direction of the exhaust fan is from bottom to top. The circulating and spraying device comprises a circulating pump, a spraying hole and a pipeline, one end of the pipeline is connected with the bottom of the material tank while the other end of the same is connected with a nozzle, the circulating pump is serially connected on the pipeline and positioned below the lower undersurface of the material tank, and the spraying hole is positioned above the middle of the inside of the tower body. During cryo-concentration, a liquid material is added into the material tank, the exhaust fan is started, the circulating pumpis started then, and the liquid material is sprayed through the spraying hole to be raindrop-shaped. The raindrop-shaped liquid material is in high-speed relative motion with airflow moving upwards inthe cryo-concentration tower in the process of falling to quickly evaporate moisture in the raindrop-shaped liquid material at normal temperature.

Abstract: The utility model discloses a regularly review heating control system surely, including controller, play water temperature sensor, time water temperature sensor, pressure sensor module, combustion system, drive module, circulating pump, alarm module, touch -sensitive screen, burning control module, go out water temperature sensor, return all connection director of water temperature sensor, pressure sensor module, combustion system, burning control module, alarm module, touch -sensitive screen, the controller passes through drive module and connects the circulating pump, circulating pump connection director. The utility model discloses a predetermineeing different required temperatures constantly, can carrying out the automatic adjustment through the controller change in the period of difference at this combustion temperature constantly, messenger's burning load, practiced thrift the consumption of gas moreover, messenger's boiler is more energy -conserving.

Abstract: The invention discloses a computer case cooling device which comprises a case A water tank is fixedly connected with the left side of an inner cavity of the case, an inner cavity of the water tank isprovided with a refrigerator, a circulating pipe is communicated with the bottom of the inner cavity of the water tank, a circulating pump is arranged on a surface of the circulating pipe, the end, which is far away from the circulating pump, of the circulating pipe penetrates the case and extends to the inner cavity of the case, an S-shaped section of the circulating pipe is positioned in the inner cavity of the case, the section, which is positioned in the inner cavity of the case, of the circulating pipe penetrates the case, extends out of the case and is communicated with the water tank,and a fan tank is fixedly connected with the bottom of the inner cavity of the case The computer case cooling device has the advantages that the case, the water tank, the refrigerator, the circulating pipe, the circulating pump, the fan tank, an electric fan, ventilation openings, a suction fan and an element mounting plate are matched with one another, and accordingly the problems of incapability of conveniently and quickly dissipating heat of computers by means of water cooling during use, excessively high costs of existing water cooling systems in markets and inconvenience in use can be solved

Abstract: The invention discloses an obstetric midwifery bed for water delivery. The obstetric midwifery bed comprises a water heater, a delivery pool, a delivery bed, a lifting mechanism, a circulating pump and a controller. The delivery bed is arranged in the delivery pool, the middle of the lower surface of the delivery bed is connected with the lifting mechanism, the lifting mechanism is fixed to the bottom of the delivery pool, the delivery pool is provided with a hot water inlet and a drain port, the drain port is connected with the circulating pump, and the water heater is provided with a first water inlet, a second water inlet and a water outlet. The first water inlet is connected with an external water supply pipeline, a three-way pipe is connected to the outlet of the circulating pump, oneconnector on the trunk of the three-way pipe is connected with the outlet of the circulating pump, the other connector on the trunk of the three-way pipe is connected with a drain pipe, the branch ofthe three-way pipe is connected with the second water inlet of the water heater through a circulating water pipeline, the branch connecting part of the circulating water pipeline and the three-way pipe is filled with an activated carbon filtration column, and the water outlet of the water heater is connected with the hot water inlet of the delivery pool through a pipeline. The obstetric midwiferybed has the advantages of implementation reliability, operation convenience and low cost.

Abstract: Fuel cell vehicle (FCV) is more advantageous compared to a gasoline-powered internal combustion engine based vehicle and is a new and popular way to solve the environmental problem. Hydrogen circulating pump is an essential assembly unit for the fuel cell, which is used in FCV. Roots blower is employed in this field. Hydrogen has a low molecular weight, which means it is easy to leak through the clearances and hard to preserve. It increases the difficulty of design and operation. In this paper, the performance parameters of a three-lobe roots blower were studied. A multi-scale model was used since the clearance, compared with the rotor diameter, is quite small and easy to induce gas leakage. The long pipes and the throttle values were included in this model. To improve the accuracy and the mesh quality, the working chambers and clearances were represented by highly deforming dynamic structured grids and the grids of the clearances had a high density. The suction and discharge ports were meshed by static unstructured grids. The interfaces were used between the two rotors and between the rotors and the suction and discharge ports. The performances were compared at three different rotational speeds of 4500 rev/min, 6000 rev/min and 8000 rev/min using hydrogen as the working fluid in this numerical model with almost the same inlet and outlet pressures. Meanwhile, the effect of the leakage was also analyzed using two different clearances, which had an important influence for the designing and using of the roots blower.