JP2003222398A - Water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent water coming out of the outlet of a delivery pipe from unintentionally dripping due to occurrence of negative pressure when a selector valve is operated. <P>SOLUTION: This water heater comprises a heating unit 10 incorporated in a sink cabinet 9 and having a heating container for heating water, a water feed route 20 for feeding water from a city water pipe 1 to the heating container 15, the delivery pipe 28 for feeding water to the upper part of the sink cabinet 9 installed in the water feed route 20 through the selector valve 22, and a check valve installed between the selector valve 22 and the outlet 23 of the delivery pipe 28. Thus, the unintentional dripping of water coming out of the outlet 23 of the delivery pipe 28 can be prevented when the selector valve 22 is changed over. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device installed in a cabinet of a sink cabinet for supplying hot water for drinking and cooking.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a hot water supply apparatus including a conventional sink cabinet disclosed in Japanese Patent Laid-Open No. 2001-343154.

Reference numeral 101 denotes a water pipe for sending tap water, and 10
2 is a water storage container and 103 is a switching valve. Reference numeral 104 denotes a water outlet, and while the water outlet button 107 of the operation unit 106 provided in the discharge unit 105 is being operated, the water supply valve 108 is opened and the switching valve 103 is connected to the water outlet pipe 109 side so that water is supplied. Can be flooded. In addition, the operation unit 106
While operating the tap button 110 of the
The pump 111 arranged at the lower part of 2 operates and the hot water outlet 112
More hot water can be discharged. In order to supply water into the water storage container 102, the switching valve 103 is connected to the water supply path side, and when the water supply valve 108 is opened, the water can be sent to the water storage container 102. The water level of the water storage container 102 is detected by the water level sensor 113, and the supply / stop of water to the water storage container 102 is automatically performed.

[0004]

However, in the above-mentioned conventional configuration, when the switching valve 103 operates by detecting a decrease in the water level in the water storage container 102, a negative pressure is generated on the water outlet pipe 109 side, and as a result, the water outlet 104. As shown in FIG. 5, the stopped water near the exit of 1st has a problem that the pressure balance is lost and the water drops outside.

The present invention is intended to solve the above-mentioned conventional problems, and an object thereof is to prevent accidental dropping of water from the water outlet due to negative pressure of the water outlet pipe during operation of the switching valve.

[0006]

In order to solve the above-mentioned conventional problems, the hot water supply apparatus of the present invention has a switching valve provided in a water supply path for supplying water from a water pipe to a heating container and an outlet provided in the switching valve. A check valve was installed in the outlet water pipe path to the water outlet.

With this configuration, it is possible to prevent the accidental dropping of water from the water outlet due to the negative pressure of the water outlet pipe that occurs when the switching valve is switched.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 has a heating unit built in a kitchen unit and having a heating container for heating water, a water supply path for supplying water from a water pipe to the heating container, and switching to the water supply path. A hot water supply device having a water discharge pipe for sending water to the upper part of the kitchen unit via a valve, and a check valve provided between the changeover valve and the water discharge port of the water discharge pipe. It is possible to prevent accidental dripping of water from the water outlet of the water discharge pipe.

According to a second aspect of the present invention, in particular, the hot water supply device is configured such that the switching valve according to the first aspect is always open to the side of the water discharge pipe, and the time for starting water discharge from the water outlet is minimized. You can

According to a third aspect of the present invention, a water supply valve is provided in the water supply path for supplying water from the water pipe to the heating container, and the water supply valve automatically opens and closes the valve by detecting the water level of the heating container.
Moreover, a switching valve for switching from the water discharge pipe side to the heating container side is provided before the opening operation, and prevents water from unexpectedly coming out of the water discharge port of the water discharge pipe when water is supplied to the heating container. be able to.

According to a fourth aspect of the present invention, a check valve is provided by providing a connecting pipe for connecting a water outlet pipe and a path leading to a water outlet of the water outlet pipe, and providing a check valve in the connecting pipe. Can be securely attached, and the action of preventing accidental dripping of water from the water outlet of the water outlet pipe can be improved.

According to a fifth aspect of the present invention, a check valve unit including a holder holding an elastic member for pressing and sealing the check valve with a biasing member is provided in the upper part of the kitchen unit to the water outlet pipe and the water outlet. The check valve can be easily attached by the structure in which the passage is connected to the inside of the connecting pipe via the seal member.

According to a sixth aspect of the present invention, the check valve is set by a structure in which the connecting pipe and the seal portion of the check valve unit are provided on the check valve urging side, and the upper portion of the connecting pipe is widely opened. The direction of can be clarified.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, the case where the hot water supply device is used in the sink cabinet of the system kitchen will be described.

FIG. 1 is a front sectional view of a hot water supply apparatus according to an embodiment of the present invention used in a sink cabinet. In FIG. 1, the hot water supply device installed in the sink cabinet 9 includes a hot water supply unit 10 housed in the sink cabinet 9 and a discharge unit 11 provided on the upper surface of the sink cabinet 9. The hot water supply unit 10 is composed of a water purification cartridge 12 which is a water purification means and a water heating section 13. The water heating section 13 is mainly composed of a main body 14 forming an outer shell of the water heating section 13, a water storage container 15 for storing water, a heater 16 for heating the water, a water level sensor 17 for detecting the amount of water, and the like.

The tap water introduced by opening the water supply valve 18 branched from the water pipe 1 passes through the raw water path 19 and reaches the water purification cartridge 12 which is a water purification means for purifying the tap water. The water purified by the water purification cartridge 12 is introduced into the main body 14 of the water heater 13, and the water supply path 2
Water is discharged from a water supply port 21 that passes through 0 and opens above the water storage container 15, and is stored in the water storage container 15. The stored water is heated by the heater 16 and becomes hot water.

Here, the water supply port 21 and the water purification cartridge 1
A switching valve 22 is provided on the water channel connecting the two with the switching valve 22.
It is possible to discharge the water purified by switching the above from the water outlet 23 provided outside the main body 14 in which the water storage container 15 is included. Further, the switching valve 22 normally connects the raw water path 19 and the water outlet 23 side, and when the water level of the water storage container 15 reaches the set position, the water path is automatically switched from the water outlet 23 side to the water supply path 20 and then It is set to supply tap water to the water storage container 15 by opening the water supply valve 18. When the water level of the water storage container 15 reaches a predetermined position, the water supply valve 18 is closed and then the switching valve 22 is switched from the water supply path 20 side to the water outlet 23 again, and the raw water path 19 and the water outlet 23 side are connected.

On the other hand, a water intake port 24 for taking out the hot water in the water storage container 15 is provided near the bottom surface of the water storage container 15, and the hot water taken out from the water intake port 24 can be discharged from the hot water outlet port 6 outside the main body 14 by the pump 25. it can. Both the outlet 23 and the outlet 6 are provided in the discharge unit 11 installed corresponding to the sink 26 installed on the upper surface of the sink cabinet 9. Further, the tap hole 6 is opened toward the sink 26, and the tapped water always enters the inside of the sink 26. Moreover, 27 is a steam port for letting out the steam generated in the water storage container 15. In addition, 28 is an outlet pipe through which purified water passes, 29 is an outlet pipe through which hot water passes, and 30 is a steam pipe through which steam passes. Further, 31 is a discharge unit mounting base fixed to the upper surface of the sink cabinet 9, and the discharge unit 11 is fixed to this discharge unit mounting base 31. Further, the water discharge pipe 28, the hot water discharge pipe 29, and the steam pipe 30 pass through an opening 40 provided in the discharge unit mount 31 and are connected to the connection pipes 41 a, 41 b, 41 c provided in the discharge unit 11.

FIG. 2 is a detailed sectional view of the connecting pipe 41a of the water discharge path. Reference numeral 42 is a check valve unit arranged in a connecting pipe 41a that connects the path 43 to the water outlet 23 and the water outlet pipe 28. The check valve unit 42 includes a check valve 44.
Is composed of a casing 47 in which an elastic member 45 such as rubber is held by a biasing member 46 such as a spring, and is attached to the inner surface of the connection pipe 41a via a seal portion 48 when attached. In this embodiment, the seal portion 48 includes the elastic member 45 on the housing 47.
It is constructed by integrally molding. In addition, the seal portion 4
8 is provided on the urging side of the check valve 44 and has a configuration in which the mounting portion of the connecting pipe 47 is opened above the sealing portion 53 so that the mounting direction of the check valve unit 42 can be clarified. it can.

FIG. 3 shows details of the operating portion 52 mounted on the discharge unit 11. 49 is a water discharge button, 50 is a hot water discharge button, and 51 is a safety switch for the hot water discharge button 50.
After pressing once, input is not accepted unless the hot water button 50 is operated.

In the above structure, the water discharge, hot water discharge, boiling water of the hot water storage container 15, and water supply operation will be described. Regarding water discharge, when the water discharge button 49 of the operation unit 52 is operated, the water supply valve 18 opens during operation, passes through the water discharge pipe 28, and is pressed by the urging force of the urging member 46 of the check valve 44 of the check valve unit 42. Since a large force is exerted, water is discharged to the outside from the water outlet 23. When the operation of the water discharge button 49 is stopped, the water supply valve 18 is closed and the check valve unit 42 keeps the check function again by pressing the check valve 44 against the elastic member 45 by the biasing member 46.

As for hot water, hot water heated in the water storage container 15, for example, hot water heated to 90 to 95 ° C., is pushed after depressing the safety switch 51 of the operating portion 52 to unlock the hot water button 50 and then hot water is discharged. When the button 50 is operated, the hot water in the water storage container 15 can be discharged from the hot water outlet 6 by the pump 25 during the operation.

When the tapping operation is repeated, the water level in the water storage container 15 decreases. This is detected by the water level sensor 17 provided in the water storage container 15, and the switching valve 22 is detected based on this result.
After switching to the water supply port 21 side, the water supply valve 18 is opened to start water supply. At this time, a negative pressure is exerted on the side of the water outlet pipe 28, but because of the action of the check valve unit 42, there is no influence of the negative pressure between the check valve unit 42 and the water outlet 23. It is possible to prevent accidental dripping of water.

The water discharged from the water supply port 21 is first temporarily stored in a water supply tray 32 provided in the water storage container 15. The stored water is introduced to the vicinity of the bottom of the water storage container 15 by the drip pipe 33 provided on the bottom surface of the water supply tray 32. Due to the difference in specific gravity, the introduced water does not mix with the existing hot water in the water storage container 15, but stays near the bottom of the water storage container 15 in a separated state. The temperature of the water is detected by the temperature sensor 34, and the water is heated by the heater until it becomes hot water. At this time, intake 2
No. 4 is installed at a position corresponding to the amount of water supplied into the water storage container 15 at one time, that is, above the upper limit position of water staying near the bottom of the water storage container 15, and only hot water is taken from the intake port 24 at any time. There is no such thing. Also, the water storage container 1
The water in 5 is heated in the space open to the atmosphere, and is usually controlled so that the maximum temperature does not exceed 95 ° C. Furthermore, if it boils for some reason, this is detected by the steam sensor 35. Since the heater 16 is detected and controlled, the pressure in the water storage container 15 hardly rises, and hot water does not spout from the hot water outlet 6.

For supplying water into the water storage container 15, the preset water amount is detected again by the water level sensor 17, and based on the result, the water supply valve 18 is closed to stop the water supply, and then the switching valve 22 is connected to the water outlet pipe 28. Switch to the side again. 36
Is a general faucet for discharging tap water, and 37 is a drain pipe.

[0026]

As described above, according to the first aspect of the present invention, by installing the check valve between the water outlet pipe and the water outlet, the negative pressure of the water outlet pipe generated when the switching valve switches. It is possible to prevent accidental dripping of water from the water outlet.

Further, according to the invention of claim 2, when the switching valve is always opened to the side of the water discharge pipe, at the time of water discharge,
When the water supply button of the operation unit is operated and the water supply valve is opened, the water supply port can be discharged in a short time by the action of the water pressure.

According to the third aspect of the invention, by installing a switching valve for switching from the water discharge pipe side to the heating container side before the opening of the water supply valve, when water is supplied to the heating container. It is possible to prevent water from unexpectedly coming out of the water outlet of the water outlet pipe.

According to the fourth aspect of the present invention, the check valve is provided in the connecting pipe, so that the check valve can be attached securely and the distance to the water outlet can be shortened. Thus, it is possible to improve the action of preventing water from dripping from the water outlet.

According to the fifth aspect of the present invention, a check valve unit composed of a holder for holding the elastic member for keeping the airtightness by pressing the check valve with the biasing member is provided in the connecting pipe with the seal member interposed. The check valve can be easily attached by the configuration of attaching the check valve.

According to the sixth aspect of the invention, the check portion is provided with the seal portion of the connecting pipe and the check valve unit on the check valve biasing side, and the upper portion of the connecting pipe is opened wide. The orientation of the set of valves can be clarified.

[Brief description of drawings]

FIG. 1 is a front sectional view of a hot water supply device according to an embodiment of the present invention used in a sink cabinet.

FIG. 2 is a detailed cross-sectional view of a connecting pipe of a water discharge path according to an embodiment of the present invention.

FIG. 3 is a diagram showing an operation unit of the water heater according to the embodiment of the present invention.

FIG. 4 is a front cross-sectional view of a conventional water heater used in a sink cabinet.

FIG. 5 is a diagram showing a situation in which a switching valve near a water outlet of a conventional water heater is switched.

[Explanation of symbols]

1 water pipe 9 sink cabinets 10 Hot water supply unit 13 water heater 17 Water level sensor 18 Water valve 20 Water supply route 22 Switching valve 23 Outlet 28 Outflow piping 41a Connection pipe 42 Check valve unit 44 Check valve 45 Elastic member 46 biasing member 47 Case (holder) 53 Seal part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masahiro Yokono             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Haruo Ishikawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (6)

[Claims] 1. A heating unit that is built in a kitchen unit and has a heating container that heats water, a water supply path that supplies water from a water pipe to the heating container, and a water supply path above the kitchen unit via a switching valve. A hot water supply apparatus comprising: a water discharge pipe for sending water; and a check valve provided between the switching valve and the water discharge port of the water discharge pipe. 2. The hot water supply apparatus according to claim 1, wherein the switching valve is configured to be always open to the water discharge pipe side. 3. A water supply valve is provided in a water supply path for supplying water from a water pipe to the heating container, the water supply valve detects the water level of the heating container to automatically open and close the valve, and precedes the opening operation. The water heater according to claim 1 or 2, further comprising a switching valve for switching from the water discharge pipe side to the heating container side. 4. A heating unit which is built in a kitchen unit and has a heating container for heating water, a water supply path for supplying water from a water pipe to the heating container, and a water supply path for supplying water to the upper part of the kitchen unit via a switching valve. A water heater having the water discharge pipe and a connecting pipe that connects a path leading to the water outlet, and a check valve provided in the connecting pipe. 5. A connecting pipe for connecting a check valve unit composed of a holder for holding an elastic member for keeping a tight seal by pressing a check valve with a biasing member, and connecting a water outlet pipe and a path leading to a water outlet at the upper part of the kitchen unit. The hot water supply apparatus according to claim 4, wherein the hot water supply apparatus is mounted in the interior via a seal member. 6. The hot water supply apparatus according to claim 4, wherein the connecting pipe and the seal portion of the check valve unit are provided on the check valve urging side, and are widely opened on the upper side of the seal portion of the connecting pipe.