JPH04129059U - Backflow prevention device for bathtubs with water heaters - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent miscellaneous water from flowing back from the miscellaneous water circuit (circulation circuit leading to the bathtub) to the hot water supply circuit of the water heater (the water supply circuit) in a bathtub with a water heater. Furthermore, water discharged from a cut-off valve provided in a hot water supply circuit can be easily treated without using electrical control means and in a state unrelated to a circulation circuit. [Configuration] A cut-off valve d is installed in the hot water supply circuit b of a bath pot with a water heater to prevent the backflow of miscellaneous water from the circulation circuit a.
A hopper 5 for receiving waste water is provided below the atmosphere opening 44 of the hopper 5, and the bottom of the hopper 5 is connected to the inner or outer surface of the main body 3b forming the furnace of the water heater 3 via the drain pipe 50. It is connected to the evaporating dish e installed in the.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on a system that connects a bathtub and a bathtub with a circulation circuit equipped with a circulation pump. A hot water supply system that consists of connecting the water supply circuit of a water heater (water heater), which is a water supply circuit, to the circuit. Prevents hot water or water from the miscellaneous water circuit from flowing back into the water supply circuit in bathtubs with a built-in bathtub. This invention relates to improvements to backflow prevention devices for preventing backflow.

0002

[Conventional technology]

The above-mentioned bathtub with a water heater has a bathtub 1 and a bathtub, as shown in FIG. 2 through a circulation circuit a equipped with a circulation pump P, and this miscellaneous water circuit In the circulation circuit a, there is a connection between the hot water outlet pipe 30 of the water heater 3 and an electric valve or solenoid valve. The hot water supply circuit b, which communicates through the on-off valve V, is connected to the hot water supply circuit b through the switching valve c and the edge cutting valve d. It is configured by communicating with each other. And, with this, firstly, the switching which is a three-way valve By switching the valve c, the water supply circuit b of the water heater 3, which is the water supply circuit, is switched to the bath water supply circuit, which is the miscellaneous water circuit. It is connected to the circulation circuit a of the tank 1, and the hot water heated by the water heater 3 is sent to the bath via the circulation circuit a. Fill the bathtub 1 with hot water, then switch when the amount of hot water in the bathtub 1 reaches a predetermined water level. Switch valve c to cut off communication between hot water supply circuit b of water heater 3 and circulation circuit a of bathtub 1, By the operation of the circulation pump P connected to the circulation circuit a, hot water in the bathtub 1 is transferred to the bath pot 2. The hot water in the bathtub 1 is reheated to maintain the desired temperature. When the water level drops after a while, the switching valve c operates again and the water heated by the water heater 3 is turned on. Furthermore, the switching valve c connects the hot water supply circuit b of the water heater 3 to the bathtub 1. While the water heater 3 is in communication with the circulation circuit a of the tank 1, the hot water supply cycle of the water heater 3 is interrupted due to a water outage, etc. When the water pressure on the road b side decreases or becomes negative pressure, the edge valve d operates and the hot water supply is interrupted. Communication between circuit b and circulation circuit a is completely cut off, and the hot water in bathtub 1 is connected to the water supply circuit. This is to avoid the inconvenience of water flowing backwards into hot water circuit B.

0003 By the way, miscellaneous water flows from circulation circuit a, which is a miscellaneous water circuit, to hot water supply circuit b, which is a water supply circuit. The edge valve d for preventing backflow is assembled with a check valve 40 as shown in FIG. The front of the valve box 4 is equipped with an inlet pipe 41 that has a built-in inlet pipe 41 and an outlet pipe 43 that has a check valve 42 built in. Atmospheric air is inserted between the check valve 40 on the inlet pipe 41 side and the check valve 42 on the outlet pipe 43 side. A check valve 4 on the inlet pipe 41 side is provided in the valve box 4. The check valve 40 on the inlet pipe 41 side closes the atmosphere opening port 44 by the valve opening operation of 0. The valve is connected to the check valve 40 on the inlet pipe 41 side so that the atmosphere opening port 44 is opened when the valve is closed. This is a normal type configured by providing an atmospheric release valve 45 connected to the Means is provided for treating water discharged from inside the valve box 4 when the port 44 is opened. Ru. That is, the valve box that is discharged from the atmosphere release port 44 when the atmosphere release valve 45 is opened. A hopper 5 for receiving water in the atmosphere is provided below the atmosphere opening 44. The lower mouth of the hopper 5 is connected to the circulation circuit a of the bathtub 1 by a drain pipe 50. , is connected to the suction side of the circulation pump P, and the drain pipe 50 has a , a solenoid valve SV is provided that opens only for a short time when the circulation pump P is started. When the circulation pump P is started, the suction force of the circulation pump P opens the air opening. The water discharged from 44 and accumulated in the hopper 5 is sucked into the circulation circuit a. There is.

0004

[Problem that the idea aims to solve]

The backflow prevention device in the bathtub with water heater configured as described above is the edge cutter valve d. When the atmosphere release valve 45 of 2 is operated to open, the atmosphere release valve provided in the valve box 4 of the cutoff valve d As a means for disposing of the water in the valve body 4 which becomes discharged from the port 44, a rim is provided. The hopper 5 provided below the atmosphere opening 44 of the cut valve d and the circulation circuit a of the bathtub 1 are connected to each other. , may be connected and communicated via a drain pipe 50 controlled by a solenoid valve SV. The piping of the circulation circuit a of the bathtub 1 is connected to the drain connecting the hopper 5 and the circulation circuit a. The problem is that the piping is difficult to assemble due to restrictions on the piping of the pipe 50. There is. It also controls the solenoid valve SV connected to the drain pipe 50 and its operation. The electrical control means and the means for assembling them are costly and The problem is that as the body becomes more complex, costs become higher.

[0005] The present invention was made in order to solve these problems that have arisen with conventional means. The circulation circuit a of the bathtub 1 and the hot water supply circuit b of the hot water supply facility connected thereto. The piping assembly of The idea is to make it easier to treat the wastewater that is produced without being restricted by the means of treatment. In addition, the treatment of wastewater from the atmosphere opening port 44 may be performed using electrical control means. and is closed off from the surroundings of the circulation circuit a and hot water supply circuit b of the bathtub 1. The purpose is to provide a new means to enable the equipment to be equipped.

[0006]

[Means to solve the problem]

In this invention, as a means to achieve this purpose, the water heater The hot water supply circuit that communicates with the hot water outlet pipe is connected to the bathtub and bath pot via the cutoff valve and the switching valve. In a bathtub with a water heater connected to a circulation circuit that communicates with Connect the bottom of the hopper below the mouth to form the furnace of the water heater through the drain pipe. A hot water supply system that communicates with an evaporating dish installed on the inner or outer side of the main body. This paper proposes a backflow prevention device for a bathtub with a vessel.

[0007]

【Example】

Next, embodiments will be described in detail with reference to the drawings. Furthermore, the drawing symbols have the same effect as those of the previous means. The same reference numerals shall be used for the constituent members.

[0008] Figure 4 is an explanatory diagram of the overall outline of a bathtub with a water heater that can implement the present invention. 1 is a bathtub, 2 is a bath pot, and a is for circulating hot water between bathtub 1 and bath pot 2. A circulation path, 3 is a water heater (water heater), and b is a connection between the hot water outlet pipe 30 of the water heater 3 and the circulation circuit a. A communicating hot water supply circuit, c is a three-way circuit provided at the communication site between hot water supply circuit b and circulation circuit a. A switching valve consisting of a valve, d is an edge cut valve provided in the hot water supply circuit b, and 5 is an atmospheric opening of the edge cut valve d. A hopper is provided below the discharge port 44, and e indicates an evaporation plate provided within the body of the water heater 3. .

[0009] The bathtub 1, the bathtub 2, and the circulation circuit a connecting them are conventionally known ones. The circulation circuit a includes a circulation circuit that operates to forcibly circulate hot water in the bathtub 1. Pump P is connected. In addition, the circulation circuit a is connected to the bath pot 2 by detecting the water temperature. A temperature sensor (not shown) is installed to control the operation.

0010 The water heater 3 includes a gas burner 3a and a main body 3b that is formed into a furnace surrounding the gas burner 3a. This is a conventionally known device consisting of a heat exchanger 3c assembled to the main body 3b. A cover 3d is provided on the outer periphery, and a hot water supply circuit b is connected to the hot water outlet pipe 30 to prevent water from entering. A water supply pipe 32 that communicates with a water faucet or the like is connected to the mouth pipe 31 . In addition, the above In the drawing, the bathtub 2 is installed separately from the water heater 3, but it is installed together with the circulation pump P. It is assembled into the cover 3d of the water heater 3.

[0011] The hot water outlet pipe 30 of the water heater 3 is connected via an on-off valve V made of a solenoid valve or an electric valve. The hot water supply circuit b, which is the hot water supply pipe to be connected, is also conventionally known, and the circulation circuit a is equipped with a three-way valve. is connected via a switching valve c, and between the switching valve c and the above-mentioned on-off valve V, The known edge valve d shown in FIGS. 2 and 3 described above is connected.

0012 Then, below the atmosphere opening 44 provided in the valve box 4, which is the body of the edge valve d, is the size when the atmosphere release valve 45 attached to the atmosphere release port 44 is opened. A hopper 5 is provided to receive water in the valve box 4 discharged from the air release port 44. be done.

[0013] However, the drain pipe 50 connected to the lower mouth of this hopper 5 is as shown in FIG. In other words, it is not directed to the circulation circuit a, but to the water heater 3 side, and the water heater It is connected to the upper opening of the evaporating dish e installed in the main body 3b of No. 3.

[0014] The evaporating dish e is a hole normally provided below the atmosphere opening 44 of the edge valve d mentioned above. It is a plate with a capacity that approximately corresponds to the capacity of the water heater 5, and is suitable for the gas burner 3a of the water heater 3. In the inner cavity of the main body 3b that forms the furnace surrounding the upper part, the inner surface of the vessel wall of the main body 3b , are installed as shown in FIG.

[0015] The evaporating dish e is provided with an overflow port 61 at its upper opening 60. There is an overflow pipe 62 connected to the overflow port 61 for hot water supply. It is led out to the outside of the vessel 3.

[0016] This evaporating dish e is a water heater 3 that surrounds the container wall of the main body 3b of the water heater 3 and the outer periphery of the main body 3b. may be provided between the cover 3d and the cross-sectional shape shown in Figure 5. It should not be formed so as to be continuous in an annular shape along the inner or outer surface of the vessel wall of the main body 3b of the water heater 3. It can be formed into any desired shape.

[0017] The embodiment device constructed in this manner operates as follows. To fill the bathtub 1 with hot water, or when the water level in the bathtub 1 has decreased. In order to replenish hot water, the switching valve c opens and the hot water supply from the water heater 3, which is the water supply circuit, is opened. When hot water flows from circuit b to bathtub 1 via circulation circuit a, which is a miscellaneous water circuit, When the water pressure on the water inlet pipe 31 side of the water heater 3 decreases or becomes negative pressure, the edge valve d closes. When the atmosphere release valve 45 is opened and the atmosphere release port 44 is opened, the valve of the border valve d is opened. The water in the box 4 flows out from the atmosphere opening 44 and enters a hopper located below it. A drain pipe flows into the hopper 5 and connects from there to the lower opening at the bottom of the hopper 5. 50, and hot water is supplied from the outlet 50a at the tip of the drain pipe 50. The water flows into the evaporating dish e provided on the inner or outer side of the vessel wall of the main body 3b of the vessel 3. , accumulates there.

[0018] This evaporating dish e is then received by the combustion operation of the gas burner 3a of the water heater 3. By raising the temperature with the heat generated by the heat generated by the evaporation plate e, the evaporation process begins to evaporate in the evaporation dish e.

[0019] Therefore, this evaporating dish e evaporates the received water using the heat generated when the water heater 3 is operating. The air release valve of the border valve d is now kept empty under normal conditions. 45 is operated to open the water discharged from the atmosphere opening port 44 of the edge valve d. , it will be processed without being discharged to the outside.

[0020]

[Effect of the idea]

As explained above, the backflow prevention device for bathtubs with water heaters according to the present invention is , the supply of water to the water heater 3, which is a clean water circuit, from the circulating circuit a side that communicates with the bathtub 1, which is a miscellaneous water circuit. An edge valve d installed in hot water circuit b to prevent miscellaneous water from flowing back into hot water circuit b. To treat the water discharged from the atmosphere opening 44 of the edge valve d, A hopper 5 provided below 4 is connected to the furnace of the water heater 3 via a drain pipe 50. The evaporation is guided to an evaporating dish e provided on the inner or outer side of the main body 3b being formed. Since the treatment is done by evaporation in dish e, there is no drain in circulation circuit a. There is no need to connect the pipe 50, and the solenoid valve SV can be connected to the drain pipe 50. It is no longer necessary to install piping and its assembly for hot water supply circuit B and circulation circuit A. This can be done easily without using electrical control means.

[Brief explanation of drawings]

FIG. 1 is an overall schematic explanatory diagram of conventional means.

FIG. 2 is a longitudinal side view of the edge valve.

FIG. 3 is an explanatory diagram of the action of the edge cutting valve.

FIG. 4 is an overall schematic explanatory diagram of a bathtub with a water heater in which the present invention can be implemented.

FIG. 5 is a partially cutaway front view of the water heater of the bathtub with a water heater.

[Explanation of symbols]

a...Circulation circuit, b...Hot water supply circuit, c...Switching valve, d...Edge valve, e...Evaporating dish, P...Circulation pump, S/SV...Solenoid valve,
1... Bathtub, 2... Bath pot, 3... Water heater, 3a... Gas burner, 3b... Main body, 3c... Heat exchanger, 3d... Cover, 30
...Hot water outlet pipe, 31...Water inlet pipe, 32...Water supply pipe, 4...Valve box, 40...Check valve, 41...Inlet pipe, 42...Check valve, 43
... Outlet pipe, 44... Atmospheric release port, 45... Atmospheric release valve, 5...
Hopper, 50...Drain pipe, 50a...Discharge port, 51
...Overflow pipe, 60...Upper opening, 61...Overflow port, 62...Overflow pipe.

Claims (2)

[Scope of utility model registration request] Claim 1: A water heater with a hot water supply circuit b that communicates with a hot water outlet pipe 30 of a water heater 3, which is connected to a circulation circuit a that communicates a bathtub 1 and a bath pot 2 via an edge cutoff valve d and a switching valve c. In the bathtub, the bottom of the hopper 5 provided below the atmosphere opening 44 of the edge valve d is installed on the inner or outer side of the main body 3b forming the furnace of the water heater 3 via the drain pipe 50. A backflow prevention device in a bathtub with a water heater, which communicates with an evaporating dish e. 2. An overflow pipe 51 is connected to the evaporating dish e, and the tip side of the overflow pipe 51 is connected to the evaporating dish e.
A backflow prevention device for a bathtub with a water heater according to claim 1, wherein the backflow prevention device is adapted to lead to the outside of the water heater.