JPS592438Y2 - Drainage accelerating device for a 1-can 2-circuit circulating hot water bath pot - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drainage promoting device for a one-can two-circuit circulating hot water supply bathtub.

Conventionally, it is known that this type of bath pot is equipped with an automatic drain valve that closes when water is flowing and opens when water does not flow, and automatically drains the accumulated water inside the adult body. Because it is slow, the pressure inside the adult and the water pipe increases, turning into steam and spewing out from the drain pipe.

The present invention aims to solve the above-mentioned drawbacks by utilizing steam blowing pressure to promote opening of the drain valve.

Below, this will be explained in detail based on an example. 1 is 1
This is a two-can circulation hot water supply bathtub, in which numeral 2 is a circulation heat exchanger communicating with a bathtub 3, numeral 4 is a hot water supply heat exchanger, and a shared heat absorption fin 5 is provided.

6 is a main burner provided below the side heat exchangers 2 and 4.

7 is a pilot burner.

8 is a thermoelectric ignition safety valve arranged at the most upstream side of the gas supply pipe 9; 10 is a pilot gas valve that opens and closes the gas passage to the pilot burner 7; and 11 is a hydraulic automatic gas valve that opens and closes the gas passage that leads to the main burner 6. It is a valve.

12 is an appliance water stop valve, 13 is a water governor installed in the main water pipe 14 on the downstream side of the appliance water stop valve 12, and 15 is the main water pipe 14 that passes through the hot water supply heat exchanger 4 to the shower 16 or the serpentine pipe 17. This is a water stop valve that opens and closes the passage.

Reference numeral 18 denotes a water pressure operating device disposed midway through the main water pipe 14, which is divided into a high water pressure chamber a and a low water pressure chamber A by a diaphragm.

Reference numerals 19 and 20 indicate drain pipes led out from the high water pressure chamber a and the low water pressure room, and 21 and 22 indicate automatic drain valves disposed in the drain pipes 19 and 20, respectively, and a response device 23 that operates by detecting water flow. The valve is closed when water is flowing through the rod 24 and opened when water is not flowing through the rod 24.

Note that 25 is a communication pipe that communicates the main water pipe 14 and the response device 23, 26 is a diaphragm that divides the interior of the response device 23 into a water pressure receiving chamber C and a steam pressure chamber d, and 27 is a restoring spring.

28 is a steam pressure introduction pipe whose one end is branched from the main water pipe 14 on the downstream side of the water stop valve 15 and the other end is connected to the steam pressure chamber d of the response device 23. A pressure valve 29 is provided which is sometimes opened.

This pressure valve 29 may be associated with an operating shaft so as to be closed when water is flowing and open when water is not flowing.

30 is an orifice, and 31 is a check valve. Reference numeral 32 is a branched wood pipe branched from the main water pipe 14 on the downstream side of the water governor 13, and the end thereof is connected to the end of the main water pipe 14 via the mixing faucet 33.

34 is a switching valve that switches the passage to the shower 16 or the flexible pipe 17 side.

The present invention has such a structure, and when circulating heating is performed immediately after hot water is used, the automatic drain valves 21 and 22 begin to open and the water stagnant in the main water pipe 14 begins to be gradually drained.

However, the drainage speed of the accumulated water is extremely slow, so if the heat exchanger for hot water supply is integrated with the circulation heat exchanger using shared heat absorption fins, the accumulated water that has not yet been drained will be exposed to the hot air of the main burner 6. .

Therefore, the water accumulated in the main water pipe 14 is heated and the pressure increases to turn into steam, and the increased pressure in the water pipe causes the diaphragm 26 to shift upward and temporarily block the automatic drain valves 21 and 22.

However, in the present invention, the pressure valve 29 provided in the steam pressure introduction pipe 28 is opened and the steam pressure is guided to the steam pressure chamber d of the reaction device 23, so that the steam passes through the steam pressure introduction pipe 28 and enters the steam pressure chamber d. The spring force of the restoring spring 27 acts in the direction of lowering the diaphragm 26.

Therefore, the diaphragm 26 is actuated via the rod 24 in the direction of opening the automatic drain valve 21.22, so that the adult bodies and the water stagnant in the water pipe are quickly drained through the drain pipe 19.20.

As described above, the present invention introduces the end of the steam pressure introduction pipe branched from the main water pipe into the steam pressure chamber of the response device that opens and closes the automatic drain valve, and uses the steam blowing pressure to suddenly open the automatic drain valve. This allows the automatic drainage system to drain at a faster rate, especially in a one-can two-circuit circulating hot water bath kettle that has a bath heat exchanger and a hot water heat exchanger installed in one unit, after the hot water supply is stopped. The blow-off of steam that occurs during immediate circulation heating is alleviated, and the risk of burns and the like during drainage is effectively eliminated.

[Brief explanation of drawings]

The drawing is an overall configuration diagram showing an embodiment of the present invention. 1...1 can 2-circuit circulating hot water bath pot, 2...
...Circulation heat exchanger, 3...Bathtub, 4...
... Heat exchanger for hot water supply, 5 ... Heat absorption fin, 1
4... Main water pipe, 15... Water stop valve, 2
1.22...Automatic drain valve, 23...Response device, 28...Steam pressure introduction pipe.

Claims (1)

[Scope of utility model registration request] The circulation heat exchanger that communicates with the bathtub and the hot water supply heat exchanger installed in the main water pipe are integrated together using common heat absorption fins, and an automatic drain valve that closes when water is flowing and opens when water is not flowing is installed. In the l-can two-circuit circulating hot water bath boiler, the end of the steam pressure introduction pipe branched from the main water pipe downstream of the water stop valve was introduced and connected to the steam pressure chamber of the response device that opens and closes the automatic drain valve. A drainage accelerating device for a one-can, two-circuit circulating hot water bath pot, characterized by the following.