In a configuration of a hybrid hot air heater in which a gas heater unit 2 and an electric heater unit 3 are incorporated into one chassis at the upper part and lower part, respectively, in such a manner that their respective air-blowing systems may be independent of each other, the heater itself is made more compact even with increases in the cross-sectional area of inlets 13 a and 13 b equipped with anti-dust filters 6 a and 6 b , respectively. The second inlet 13 b of the electric heater unit 3 provided on the chassis 11 is arranged below a gas burner 20 in such a manner as to conserver space and serves as an air inlet passage on the rear side of a housing 211 of a first air-blowing fan 21 that separates the gas heater unit 2 and the electric heater unit 3 from each other.

Hybrid hot air heater

PROBLEM TO BE SOLVED: To provide a highly reliable automatic operation type submerged pump capable of surely stopping, without having to provide an electrode and a float type water level detector which may be damaged, when handling them outside the pump and detecting a draught water flow operation condition due to the reduction of water level by monitoring other electric motor operation parameters, without relying on conventional current values to control operation. SOLUTION: This automatic operation type submerged pump for controlling the operation of a motor 1 by detecting a water level is provided with a phase difference detection means for detecting the difference in phases between a voltage and a current supplied to the motor 1, and a pump control means for stopping the automatic operation submerged pump PC, when the difference in phase reaches a prescribed threshold.

Automatic operation type submerged pump

PROBLEM TO BE SOLVED: To provide a pump shutdown measures to possess higher reliability and easy modification of existing pump instead of conventional ON/OFF control by liquid level detection, for pump automatic operation. SOLUTION: A pump operation control unit equips drive electric power wave shape of pump motor 6, a phase converter 2 to judge the pump optimum operation by phase-contrast of electrical current wave shape detected by electrical current sensor A, and a judgment circuit, and then makes ON/OFF control of pump motor based on the results of a judgment circuit.

Pump operation control unit

PROBLEM TO BE SOLVED: To provide a forced circulation type bath system which is enabled to extend the service life by stopping a pump to suppress wear of a pressure switch in a case intermittently repeating ON/OFF motion of the pressure switch to switch OFF after instantly switching ON. SOLUTION: This forced circulation type bath system is enabled to forcibly suck hot water in the bath tub 1 through a suction port 10 into a forced circulation passage 20 and blow out through a delivery port 11 into the bath tub 1 by a pump 21 equipped in the forced circulation passage 20. A pressure switch 22 to switch ON when pressure in the forced circulation passage is lowered to a set negative pressure level is equipped on the forced circulation passage. An operation controller 30 to output a stop signal to the pump 21 when an ON condition of the pressure switch 22 is continued for a prescribed time and when a prescribed number of switching ON/OFF is repeated within a prescribed time.

Forced circulation type bath system

PROBLEM TO BE SOLVED: To provide a jet bath device capable of massaging a part of the body of a bathing person in such a way as rubbing the body in the vertical direction by swinging the direction of jetting of the water stream in the vertical direction and preventing the jetting water stream from shooting upward from the surface of hot water in a bathtub when the level of the hot water in the bathtub is lowered. SOLUTION: The device is the jet bath device in which the direction of jetting of the water stream from an outlet 3 disposed in the bathtub 1 is swung in the vertical direction. The upper limit of the range of the swing of the jetting water stream is variable. The direction of jetting with the range of swing of the jetting water stream at the upper limit when the level of the hot water in the bathtub 1 is at least a prescribed level C is turned diagonally upward so that the angle of jetting is a predetermined maximum angle of jetting. If the level of the hot water in the bathtub 1 is less than the prescribed level C, the direction of jetting with the range of swing of the jetting water stream at the upper limit is turned downward from the direction of jetting of the water stream jetted at the maximum angle of jetting. COPYRIGHT: (C)2007,JPO&INPIT

Jet bath device

PURPOSE: To surely prevent the air lock of a circulation pump by speedily discharging air from a circulation flow path by adopting a self-sucking pump as a circulation pump and fitting an air vent valve to the circulation flow path on the discharge side of this circulation pump. CONSTITUTION: A main body 11 of the bathtub and a functional part 19 are connected through the circulation flow path, the main body 11 of the bathtub is filled with hot water and afterwards, a circulation pump P is operated. In this case, since the circulation pump P is composed of the self-sucking pump, even when the circulation pump P is set at the relatively higher position in comparison with the main body 11 of the bathtub, the bathing hot water in the main body 11 of the bathtub is sucked up through a sucking pipe 14, sucked in the circulation pump P and jetted out from a bathing hot water jetting nozzle 15 through a forced feeding pipe 16 to the main body 11 of the bathtub later. Since an air vent valve 17 is attached to the discharge port of the circulation pump P, air in the forced feeding pipe 16 does not receive the water pressure of water in the bathtub, and air in the sucking pipe 14 is speedily discharged to the atmosphere.

Bathing hot water circulating bathtub

PURPOSE:To provide the flow control valve in the bubble generating bathtub system, which can control a jetting form of bath hot water in which bubbles are mixed, jetted into a bathtub. CONSTITUTION:Between a bathtub main body 1, and a circulating pump P installed on the outside of the bathtub main body 1, a bathtub hot water circulating flow passage B consisting of a bath hot water suction flow passage B1 and a bath hot water forced feeding flow passage B2 is provided, and also, to an opening part of the high hot water forced feeding flow passage B2 provided in the bathtub main body 1, jetting nozzles 4, 5 are attached, and moreover, the bath hot water forced feeding passage B2 and an air intake part are allowed to communicate and connected so that bath hot water in which bubbles are mixed can be jetted from the nozzles 4, 5 into the bathtub main body 1. Furthermore, in the generating bathtub system constituted by providing flow control valves V, V for varying a jetting form of bath hot water in a discharge tube for constituting the bubble bath hot water forced feeding flow passage B2, an exciting system of a driving motor M for driving the flow control valves V, V is switched in accordance with the jetting form, and also, an applied voltage to the driving motor M is varied in accordance with the switched exciting system.

Flow control valve in bubble generating bathtub system

PROBLEM TO BE SOLVED: To enhance operability and visibility of an operation panel for totally controlling a plurality of bathtub devices for heating bathtub water by displaying only bath water temperature set value when bath water temperature detection value is expected to become equal to the bath water temperature set value in a comparatively short time and displaying both of the values otherwise. SOLUTION: In a remote control 29 wherein a hot water supply system for adding hot water to a bathtub and reheating bathtub water and a bathtub water recirculating, purifying and temperature-keeping system using an electric heater as a heating source are totally controlled, an LCD panel 55 is provided and a function-selecting key 61 and a device-selecting key 63 for selecting a bathtub device to be operated are also provided. A control section in the remote control 29 diagnoses magnitude of heating capacity of the respective bathtub devices and when a bathtub device diagnosed to have a comparatively large heating capacity is to be driven, only bath water temperature set value is displayed on a screen, and when a bathtub device diagnosed to have a comparatively small heating capacity is being driven, the bath water temperature set value and bath water temperature detection value are displayed on the screen.

Operation panel for bathtub devices

PROBLEM TO BE SOLVED: To enhance safety of a bathtub system by providing a control means for stopping at least functions of all bathtub devices corresponding to an abnormal/trouble state when a judgment that a bathtub device in a status of abnormality/trouble exists is made according to status detection information from a plurality of the bathtub devices. SOLUTION: In a system wherein a hot water supply system 23 for adding hot water to a bathtub 21 and reheating bathtub water, a bath water recirculating, purifying and temperature-keeping system 25 having an electric heater as a heating source and a bubble generating device 27 are totally controlled by a single remote control 29, a status control section is provided in the remote control 29. By using this status control section, connection and disconnection of each of bathtub devices, sequence control of the respective bathtub devices and normality/abnormality/trouble of the respective devices are checked. If an abnormality is detected during controlling, driving of all the bathtub devices are instantaneously stopped whether the hot water supply system 23 and the bubble generating device 27 are normal or abnormal. Thus, safety of a bathtub device system is secured.

Control apparatus for bathtub devices

PURPOSE: To operate a plurality of functional units without interference of functions with each other by providing a plurality of functional units each with a different function and check valves in the midway of a circulation flow path connected with a suction hole and a discharging hole of a bathtub main body. CONSTITUTION: A circulation flow path C is constituted of an air bubble jet generating flow path C1 , a hot water feeding flow path C2 and a bathtub cleaning/sterilizing/heat-insulating flow path C3 . In addition, a circulation flow path on the suction side of the air bubble jet generating flow path C1 is formed of a suction pipeline 12 and a circulation flow path on the discharging side is formed by a discharging pipeline 15 and branching pipelines 16 and 17. In addition, a plurality of check valves V1 -V4 are provided on the circulation flow path C. When pumps P1 -P3 of required functional units U1 -U3 are actuated by an arbitrary combination, all the functional units U1 -U3 can be actuated thereby without interfering with each function and smoothly.

Bathtub unit provided with a plurality of functional units

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