JPH0315966Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a one-can two-circuit hot-water bath kettle that incorporates a bath heat exchanger and a hot water heat exchanger in a single can.

In conventional hot water baths of this type, if hot water is supplied immediately after stopping the reheating of the bath, there is a risk that the hot water remaining in the hot water supply heat exchanger will reach a high temperature and be discharged.

This invention eliminates the above-mentioned dangers and automatically stops the supply of hot water to the bathtub at an appropriate amount.When reheating, the circulating pump uses forced circulation to uniformize the water temperature in the bathtub and ensure that the desired temperature is reached. To provide a one-can two-circuit hot water bath pot that automatically stops reheating.

This will be specifically explained based on the illustrated embodiment. The figure shows a schematic configuration of an embodiment of the present invention, in which numeral 1 is a one-can, two-circuit type hot water bath pot according to the present invention, and numeral 2 is a bathtub. 3 is a can body, into which a hot water supply heat exchanger 4 and a bath heat exchanger 5 are incorporated. A water supply pipe 6 and a hot water supply pipe 7 are connected to the hot water heat exchanger 4, and an outgoing pipe 8 and a return pipe 9 are connected to the bath heat exchanger 5. Each is connected to the bathtub 2. A water flow detector 10, a temperature detector 11, and a circulation pump 12 are provided in the middle of the return pipe 9. The hot water supply pipe 7 is provided with a flow rate regulator 13 and a temperature detector 14, and 15 is a branch pipe branched from the downstream side of the temperature detector 14. 16 is a solenoid valve provided in the branch pipe 15. 17 is a hopper that receives hot water discharged from the branch pipe 15; 18 has one end connected to the hopper 17, and the other end connected to the circulation pump 12 of the return pipe 9;
This is a connecting pipe connected to the more upstream side. 19 is a flow rate detector interposed in the middle of the water supply pipe 6;
0 is a burner.

The present invention has such a configuration, and its operation will be explained next. When performing normal hot water supply from the water supply pipe 7, water is supplied from the water supply pipe 6, and the flow rate detector 1
When 9 detects the water flow, the burner 20 performs combustion to heat the water in the hot water heat exchanger 4, and the flow rate regulator 13 is controlled based on the hot water temperature detected by the temperature detector 14, and the hot water pipe is closed. 7. Dispense hot water at the desired temperature.

When automatically supplying hot water to the bathtub 2, the solenoid valve 16
At the same time, the circulation pump 12 is operated, and the water supplied from the water supply pipe 6 is heated by the burner 20 in the hot water heat exchanger 4, and then passes from the branch pipe 15 to the hopper 17 and the communication pipe 18 to the bath heat exchanger. 5, where it absorbs some heat again and is supplied from the outgoing pipe 8 to the bathtub 2. At this time, the flow rate detected by the flow rate detector 19 provided in the water supply pipe 6 is integrated, and when the preset flow rate is supplied, the electromagnetic valve 1
6 is closed to stop combustion in the burner 20, and at the same time, the operation of the circulation pump 12 is stopped to end hot water supply. Note that the route from the water supply pipe 6 to the branch pipe 15 and the communication pipe 18 are separated by the hopper 17, so even if the water supply pipe 6 is directly connected to the city water supply,
This avoids the problem of so-called municipal tap water and miscellaneous water mixing.

To reheat the appropriate amount of hot water stored in the bathtub 2 by the above-mentioned automatic hot water supply, the circulation pump 12 is operated, the water flow detector 10 detects the water flow, and the burner 20 is activated.
The hot water in the bathtub 2 passes through the return pipe 9, is heated by the bath heat exchanger 5, and is sent from the outgoing pipe 8 to the bathtub 2.
It is forced to circulate through the route that leads to . When the temperature of the hot water detected by the temperature detector 11 reaches the set temperature, the operation of the circulation pump 12 is stopped, the water flow detector 10 is turned off, and the combustion of the burner 20 is stopped. During this reheating of the bath, the temperature of the hot water remaining in the hot water supply heat exchanger 4 gradually rises under the influence of heating by the bath heat exchanger 5. This temperature rise is caused by hot water pipe 7.
When the temperature detection means 14 detects a hot water temperature exceeding a predetermined temperature, the solenoid valve 16 is opened and the flow rate regulator 13 is controlled based on the detected hot water temperature, and the water supply heat exchanger 4 The hot water inside is made to flow out little by little from the hopper 17 to the communication pipe 18. The above operation is performed during reheating of the bath to avoid high temperature hot water remaining in the hot water supply heat exchanger 4.

In this way, the present invention uses a one-can, two-circuit hot water bath kettle with a flow rate detector installed in the water supply pipe to integrate the flow rate when hot water is supplied to the bathtub, and a water flow detector and a temperature sensor installed in the return pipe. and a circulation pump to forcibly circulate hot water in the bathtub and detect the hot water, and provide a path from downstream of the temperature detector of the hot water supply pipe to upstream of the circulation pump of the return pipe, A solenoid valve is placed in the middle of this path to open the solenoid valve when hot water is being supplied to the bathtub and when the water temperature in the hot water supply circuit exceeds a predetermined temperature during reheating of the bath. When supplying hot water to the bathtub, the hot water supply is automatically stopped at the appropriate amount, and when reheating, the temperature distribution in the bathtub is made uniform by forced circulation by a circulation pump, and the operation is automatically stopped when the desired temperature is reached. Furthermore, even if hot water is supplied immediately after reheating the bath, there is no need to use a trowel to discharge hot water at a temperature higher than the desired temperature, and there is an advantage of excellent safety and usability.

[Brief explanation of the drawing]

The figure is a schematic configuration diagram showing an embodiment of the present invention. 4... Heat exchanger for hot water supply, 5... Heat exchanger for bath, 6... Water supply pipe, 7... Hot water supply pipe, 8... Outgoing pipe,
9... Return pipe, 10... Water flow detector, 11, 14
...Temperature detector, 12...Circulation pump, 13...
Flow regulator, 15... Branch pipe, 16... Solenoid valve,
17...Hopper, 18...Connecting pipe, 19...Flow rate detector, 20...Burner.

Claims (1)

[Scope of utility model registration request] In a one-can two-circuit hot water bath kettle that incorporates a bath heat exchanger and a hot water heat exchanger in a single can, the outgoing pipe and return pipe led out from the bath heat exchanger are connected to the bathtub, respectively. A hot water supply circuit is constructed by disposing a water flow detector, a temperature detection body, and a circulation pump in the middle of the return pipe of the bath circuit, and connecting a water supply pipe and a hot water supply pipe to a hot water supply heat exchanger. A flow rate detector is interposed in the water supply pipe, a flow rate regulator and a temperature detection body are provided in the hot water supply pipe, and a path is provided from downstream of the temperature detection body to upstream of the circulation pump of the return pipe. 1. A one-can two-circuit hot water bath kettle, characterized in that a solenoid valve controlled by a temperature detector and a flow rate regulator of a hot water supply circuit is provided in the middle of the path.