JPH0529269Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a check valve device for a water heater for sanitary washing equipment.

[Prior art]

A wide variety of structures have been proposed for sanitary cleaning devices equipped with hot water jetting devices for spraying warm water onto the private parts of the user after using the toilet to clean the private parts, heated toilet seats to warm the user's buttocks, etc. . In this type of sanitary washing equipment, a washing water supply line formed between a water heater for heating and adjusting the hot water used for washing and a water supply pump installed in an external water tank is equipped with hot water. Various types of check valves are provided for the purpose of preventing backflow of water and preventing supply water from flowing out from the tip of the cleaning nozzle due to a siphon phenomenon.

However, conventional check valves are directly connected to the drain port provided at the bottom of the water heater, and are constructed in one piece that combines the functions of a drain port, water supply port, and check valve. Since this is a common practice, it has the following problems.

(1) Due to long-term absence or other reasons, it may be necessary to drain the water heater or clean the check valve. In such cases, it becomes necessary to disassemble the water heater's drain port. However, since the drain port is located at the bottom of the water heater and has an extremely low installation height, and the sanitary cleaning device is installed in a narrow toilet, disassembling the drain port is extremely difficult. Deteriorate. Furthermore, regarding the container for receiving the drained water, the space below the water heater is narrow, so only a small container can be used, making it inconvenient to use the water container.

(2) Since a check valve is installed directly under the bottom of the water heater, the water inside the pipes from the water supply pump to the water heater is shut off from the water heater side, and remains cold water at all times. For this reason, in cold regions, there is a risk that the water in the pipes may freeze during the harsh winter months, impairing the functionality of the sanitary washing device.

[Purpose of invention]

The present invention was developed in consideration of the above-mentioned conventional problems, and is a water heater for sanitary washing equipment that significantly improves maintenance workability when draining water from the water heater, cleaning the check valve, etc. The purpose of this invention is to provide a check valve device.

[Structure of the idea]

A check valve device for a water heater for sanitary washing equipment according to the present invention connects a water heater for heating and adjusting the temperature of washing hot water and a pump installed in a low tank for supplying washing water to the water heater. an upstream valve box cover that is provided in the middle of the flexible piping and has a conduit that passes through a through hole formed in a side wall of the gas phase section of the low tank and is connected to the flexible piping inside the low tank; The upstream valve box cover is fastened to the upper end in a water-sealed state, and the valve box has an axial passage and a valve seat formed therein, and is biased in the valve closing direction by a spring to the valve seat. A check valve consisting of a valve body in close contact with the valve body and a downstream valve box cover that is fastened to the lower end of the valve box in a water-sealed state and has a conduit connected to the flexible piping is attached to the side of the low tank using a fixture. It is characterized by being fixed at .

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

First, the overall configuration of the sanitary cleaning device will be explained. The water stored in the low tank 6 is pressurized by a submersible pump 10, and is supplied to the water heater 4 via a check valve 11 through a rubber pipe 5 as a flexible pipe. The hot water in the water heater 4 is pushed out of the water heater 4 by the water supply from the low tank 6 and flows inside the hot water storage toilet seat 2,
Cleaning water is ejected from the tip of the cleaning nozzle 3 in a shower-like manner via a cleaning water jetting device 8 attached to the lower part of the toilet seat 2. The private parts of the person sitting on the toilet seat 2 are washed by this jetted hot water. The submersible pump 10 is started and stopped by a switch provided on the nozzle rotation lever 9.
This is done in conjunction with the rotation of the Moreover, the water heater 4
The inside of the toilet seat 2 is suitably equipped with a heating means 7 consisting of, for example, a sheathed wire heater, and a thermostat means (not shown) for automatically adjusting the action of the heating means 7 according to the temperature of the stored water. The temperature of the cleaning hot water and the temperature of the cleaning hot water can be controlled to optimum temperatures.

Check valve 11 provided in the middle of the rubber piping 5
has the structure shown in FIG.

The conduit 13, which is integrally formed to protrude with the upstream valve box cover 14 of the check valve 11, passes through a through hole 6a formed in the side wall of the gas phase side of the low tank 6, and is arranged inside the low tank 6. It is connected to the rubber piping 5. The material of the conduit 13 is as follows:
Metal or plastic is preferred, and this conduit 1
In addition to the function of configuring the inlet part of the check valve 11, 3 has the following functions:
It has the following two functions.

(1) The rubber piping 5 is prevented from being crushed by the side wall penetration portion of the low tank 6, and deterioration of the rubber piping and poor water flow due to such collapse are avoided.

(2) Through hole 6a formed in the side wall of low tank 6
To prevent a situation where the rubber piping 5 is rubbed by the rubber piping 5 and damaged early.

The upstream valve box cover 14 has a gasket 22
It is fastened to the upper end of the valve box 15 via. A valve chamber 17 having a valve seat 16 with a smooth surface is formed inside the valve box 15, and a valve body 18 is formed inside the valve chamber 17.
is located. The valve body 18 is brought into close contact with the valve seat 16 formed above the valve body 16 from below, and is elastically pressed by a spring 19 compressed between the valve body guide 20 and the valve body guide 20. As a result, a closed state is established between the valve body 18 and the valve seat 16. The valve body guide 20 is for pivotally supporting the valve body 18 and is composed of a bearing portion and an outer ring connected by a radial rim, thereby ensuring a water flow path in the valve body guide 20. ing. The valve body guide 20 is supported on the inner bottom surface of a downstream valve box cover 21 which is fastened to the lower end of the valve box 15 via a gasket 23. A conduit 24 that is integrally formed with the downstream valve box cover 21 is formed in the center of the downstream valve box cover 21 so as to protrude downward. Further, the conduit 24 is connected to one end of the rubber piping 5 connected to the water heater 4, and the rubber piping 5 and the valve chamber 1 are connected to each other.
7 are in communication with each other.

The downstream valve box cover 21 is attached to a fixture 25 made of an elastic material such as rubber, and a suction cup 25a formed on one side of the fixture 25 is attracted to the side surface of the low tank 6. The above-mentioned check valve 11 is fixed by this.

In the above configuration, the operation of the check valve 11 will be explained. When the submersible pump 10 is stopped, that is, when shower cleaning is not being used, the valve body 18 is pressed against the valve seat 16 of the valve body 15 by the biasing force of the spring 19. As a result, the submersible pump 10
The cold water on the side and the hot water on the water heater 4 side are completely shut off by the check valve 11, which prevents the hot water from flowing back into the low tank 6 side and preventing the supply water from flowing out from the tip of the cleaning nozzle 3 due to the siphon phenomenon. The original function of the valve is demonstrated.

Next, when the submersible pump 10 is in operation, that is, in the shower cleaning state, the valve body 18 is pushed down by the pumping action of the submersible pump 10 against the stored force of the spring 19, so that there is a gap between the valve body 18 and the valve seat 16. A clearance is created between the two, through which water passes smoothly and flows into the water heater 4 side via the rubber piping 5.

For the function of the check valve 11, it is extremely important that the seal between the valve body 18 and the valve seat 16 be perfect. In particular, check valves for water heaters used in sanitary washing equipment are prone to water scale and other foreign matter that may be present in the valve body 18.
If the valve gets caught between the valve seat 16 and the valve seat 16, the valve function is likely to be impaired. Therefore, it is necessary to disassemble and clean the check valve 11 from time to time. In the present invention, the above-mentioned improvement in workability is particularly considered, and the check valve 11 is installed at a height of 70 to 80 cm above the floor near the side wall of the low tank 6. This improves the workability of disassembling and cleaning the check valve 11. In addition, at that time, by lifting the connecting end of the rubber piping 5 on the downstream side of the check valve 11 to a higher position than the water heater 4, or closing the end of the rubber piping 5 with a clip or the like, hot water can be removed each time. There is no need to drain the water from container 4.

If it is necessary to drain water from the water heater 4 when you are away for a long time or when you move, you can remove the water from the rubber piping 5 by pulling out the connection between the check valve 11 and the rubber piping 5 on the downstream side. Water can be easily accessed at these locations. Further, since the rubber pipe 5 between the check valve 11 and the water heater 4 is always in a state where hot water is conducted, there is no risk of freezing even in the harsh winter of a cold region.

[Effect of idea]

Since the check valve device for a water heater for sanitary washing equipment according to the present invention has the above-mentioned configuration, it exhibits the following excellent effects.

(a) Since a check valve is installed on the gas phase side wall of the low tank, the check valve is set at a high position. Therefore, workability when disassembling and cleaning the check valve and draining water from the water heater is greatly improved, and maintenance becomes extremely easy.

(b) The conduit on the upstream side of the check valve was passed through the through-hole of the low-tank and connected to flexible piping inside the low-tank, so this problem occurs when conventional rubber piping is directly passed through the through-hole of the low-tank. It becomes possible to reliably prevent deterioration and damage to the rubber piping caused by crushing, rubbing, etc. of the rubber piping.

(c) Since the flexible piping connecting the check valve and the water heater is always connected to the water heater, there is no risk of the flexible piping freezing even during the harsh winter months of cold regions.

(d) Since a fixing device for the check valve is provided, the check valve can be easily fixed to the side of the low tank, which makes it look very good.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the present invention, and is a block diagram of a sanitary washing device equipped with a check valve. Figure 2 is an enlarged vertical cross-sectional view of the main parts of the check valve used in the present invention. It is. 3 is a shower nozzle, 4 is a water heater, 5 is rubber piping (flexible piping), 6 is a low tank, 6a is a through hole, 7 is a heating means, 8 is a hot water jet device, 10 is a submersible pump, 11 is a check Valve, 13 is a conduit, 14 is an upstream valve box cover, 15 is a valve box, 16 is a valve seat, 1
7 is a valve chamber, 18 is a valve body, 19 is a spring, 20 is a valve body guide, 21 is a downstream valve box cover, 22 and 23 are gaskets, 24 is a conduit, and 25 is a fixture.

Claims (1)

[Scope of utility model registration request] In a sanitary washing device that has a nozzle for washing private parts and when used, hot water is sprayed from the tip of the nozzle to wash the private parts of the human body, a water heater for heating and adjusting the washing hot water and a water heater for this water heater are used. It is installed in the middle of flexible piping that connects the pump installed in the low tank to supply water for cleaning.
an upstream valve box cover having a conduit that passes through a through hole formed in a side wall of the gas phase portion of the low tank and is connected to the flexible piping inside the low tank; and the upstream valve box cover is in a water-sealed state. a valve box which is fastened to the upper end thereof and has an axial through passage and a valve seat formed therein; a valve body which is urged in the valve closing direction by a spring and comes into close contact with the valve seat; A sanitary cleaning characterized in that a check valve consisting of a downstream valve box cover having a conduit that is fastened to the lower end in a water-sealed state and connected to the flexible piping is fixed to the side of the low tank with a fixture. Check valve device for water heaters.