JP2002195652A - Hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To boil water, while supplying city water directly using an open type water storage container. SOLUTION: The hot water supply apparatus comprises a city water-purifying section 8, a stop valve 10 disposed on a water passage connecting a city water pipe 1 and the water-purifying section 8, a container 2 for storing water purified at the water purifying section 8, a heater 12 for heating water in the water storage container 2, a water supply opening 11 for delivering purified water into the water storage container 2 disposed above the water purifying section 8, a pump 17 for pumping up hot water from the water storage container 2, a hot water outlet 6 for delivering hot water pumped by means of the pump 17, and an opening 21, through which water in the water storage container 2 overflows. Since the opening 21 is provided lower than the water supply opening 11, water in the water storage container 2 is prevented from flowing back to the city water pipe 1. Furthermore, damages due to overflow can be reduced on the periphery of the hot water supply apparatus, and city water can be supplied directly thereto.

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 of a water supply type for supplying purified water and hot water.

[0002]

2. Description of the Related Art FIG. 11 is a cross-sectional view when a conventional water heater of this type is used for a kitchen unit, and is called a small electric water heater having a so-called water purification function.
In FIG. 11, 1 is a water pipe for sending tap water, 2 is a water storage container, and 3 is a heater for heating water stored by a heater. Water is branched by a branch fitting 4 attached to the water pipe 1, and water is sent to the water storage container 2 by opening a water stop valve 5.
At this time, the hot water in the water storage container is pushed out by tap water,
Hot water is discharged from the tap 6. A water purification section 8 is provided in the middle of a water channel 7 connecting the water storage container 2 and the tap hole 6, so that purified hot water can be discharged. A check valve 9 prevents water in the water storage container 2 from flowing back to the water pipe 1.

[0003]

However, in the above-mentioned conventional construction, since water is heated in the closed container, when the water in the water storage container 2 is boiled, hot water is ejected from the tap hole 6. The cold water remaining in the water channel 7 comes out first, water goes out halfway when it is continuously hot water, and it is difficult to obtain a predetermined hot water flow rate because the water pressure changes due to house differences and time zones. Since the water path from the water valve 5 to the tap hole 6 is long, there is a problem in usability such that running out of hot water when stopping the tapping is poor. In addition, since the water pipe is directly connected to the water reservoir, the probability is extremely low, but if the check valve stops functioning for some reason and the inside of the water pipe becomes negative pressure, the water in the water reservoir will be drained. There was a problem of flowing backward to the water pipe.

[0004] The present invention solves the above-mentioned conventional problems, while improving the usability by boiling water in an open-type water storage container while supplying water by direct water supply, and storing water using a method other than a check valve. It is an object of the present invention to provide a hot water supply device capable of preventing water in a container from flowing back to a water pipe and, at the same time, eliminating damage to the kitchen periphery due to overflow.

[0005]

In order to solve the above-mentioned conventional problems, a hot water supply device of the present invention discharges water purified by a water purification section into a water storage container once, heats the water, and discharges the hot water with a pump. At the same time, the water storage container is provided with an opening below the water supply port for overflowing the water inside. Thus, it is possible to perform the water heating in the open-type water storage container while supplying the water by direct water supply. Also,
Since the outlet of the water supply port is provided at a predetermined distance from the water surface in the water storage container, it is possible to prevent the water in the water storage container from flowing back to the water pipe even if the check valve should not function. it can. Further, since the water storage container is provided with the opening, even if the water overflows, the overflow can be discharged to the outside from the opening.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a water purification section for purifying tap water, a water stop valve provided on a water channel connecting a water pipe and the water purification section, and a water purified by the water purification section. A water storage container for storing water, and a heater for heating water in the water storage container,
A water supply port provided above the water storage container for discharging purified water into the water storage container, a pump for pumping hot water from the water storage container, and a tap hole for discharging hot water pumped by the pump;
An opening through which water in the water storage container overflows out of the water storage container, and the opening is provided below the water supply port. With this, it is possible to boil water in the open type water storage container while supplying water by direct water supply, so that even if the water in the water storage container boils, hot water does not blow out from the outlet.
At the start of hot water supply, the hot water in the water storage tank can be discharged from the beginning, water does not flow during continuous hot water supply, and even if the water pressure changes due to house differences or time zones, a predetermined hot water flow rate can be obtained regardless of that. Since the water passage to the pump and the discharge port is short and the hot water easily returns to the water storage container due to the head pressure, the usability is improved, for example, when the hot water is stopped and the hot water runs out. At the same time,
Since the outlet of the water supply port is located at a predetermined distance from the water surface in the water storage container, it is possible to prevent the water in the water storage container from flowing back to the water pipe even if the check valve fails to function. Things. Further, even if water overflows from the water storage container, the water is discharged to the water receiving basin or the drain pipe, so that damage to the vicinity of the kitchen can be eliminated.

According to a second aspect of the present invention, there is provided a water purification section for purifying tap water, a water stop valve provided on a water channel connecting the water pipe and the water purification section, and a water storage container for storing water purified by the water purification section. , A heater for heating water in the water storage container, a water supply opening that opens above the water storage container and discharges purified water into the water storage container, a main body that contains the water storage container, and water that is purified by the water purification unit to the outside of the main body. A water discharge port for discharging water, a switching valve for selectively switching an outlet of water purified by the water purification section to one of a water supply port and a water discharge port, and a water intake port provided in the water storage container and for taking out hot water in the water storage container, It has a pump for feeding hot water taken out of the water intake to the outside of the main body, a water outlet corresponding to the water outlet, and a discharge unit provided with a water outlet and a water outlet. The main body is included in the water receiving unit, and discharged. When the unit is placed on the top of the water basin unit, Since the water reservoir has an opening below the water supply port for overflowing the water in the water reservoir to the outside of the water reservoir, the water can be boiled in the open water reservoir while the water is directly supplied to the water supply. Hot water does not blow out from the tap even when the water in the water reservoir is boiled, hot water can be supplied from the beginning at the start of hot water supply, water does not come out during continuous hot water supply, water pressure changes due to house differences and time zones Regardless of that, a predetermined tap water flow rate can be obtained, and the water path between the pump and the tap hole is short and the hot water easily returns to the water storage tank due to the head pressure in the water path. improves. At the same time, even if the check valve fails, the water in the water storage container can be prevented from flowing back to the water pipe.

[0008] The invention described in claim 3 is claim 1 or 2.
, A flow control valve provided on a water channel connecting a water pipe and a water supply port, an overflow detecting means provided inside the main body outside the reservoir to detect the presence of water, and a pump based on an output of the overflow detecting means. And a control circuit for driving the water reservoir from the water inlet to the water reservoir per unit time is set to be smaller than the drainage per unit time drained out of the water reservoir by the pump, Even if water is continuously supplied into the water storage tank for a long time, the water is drained out by the pump, so the amount of water that overflows from the opening to the outside of the water storage tank becomes extremely small, and damage to the kitchen area is minimized. Less.

The invention described in claim 4 is the first or third invention.
In, a flow regulating valve provided on a water channel connecting a water pipe and a water supply port, a water level detecting means for detecting a water level in a water storage container, and a control circuit for driving a pump based on an output of the water level detecting means. The amount of water supplied per unit time from the water supply port to the water storage container is set to be smaller than the amount of water discharged per unit time from the water reservoir to the outside of the water storage container by the pump. With the configuration that opens, even if water is continuously supplied into the water storage container for a long time, it can be drained to the water receiving pedestal by the pump before overflowing from the opening to the outside of the water storage container. The water does not overflow from the kitchen and damage to the surroundings of the kitchen is surely eliminated.

[0010] The invention according to claim 5 is the invention according to claim 1 or 4.
In the configuration, a water supply stop water level for stopping water supply to the water storage container, a water increase detection means for detecting that water is increased from the water supply stop water level, and a control circuit for stopping a heater input based on an output of the water increase detection means Therefore, when the water stop valve has a water stoppage failure, the water temperature can be lowered and then the water can be safely discharged to the water cradle.

The invention according to claim 6 is the first or second invention.
The opening provided in the water storage container for overflowing the water in the water storage container to the outside of the water storage container is connected to a drain pipe provided in the water receiving pedestal, and is provided on a water channel connecting the opening and the drain pipe. Is provided with a check valve, so that water overflowing from the water storage container can be safely and directly flowed to the drain pipe without providing any special detection means or drainage means.

The invention according to claim 7 is the invention according to claim 1 or 6.
In the opening provided in the water storage container for overflowing the water inside the water storage container to the outside of the water storage container is provided near the bottom surface of the water storage container, and the top position of the overflow channel connected to this opening is in a normal use state. Since it is arranged above the water level in the water storage container and below the water supply port, direct heat radiation does not occur from the water surface in the water storage container in the overflow pipe, so that the amount of heat radiation can be reduced. .

The invention according to claim 8 is a water purifier for purifying tap water, a water stop valve provided on a water channel connecting a water pipe and the water purifier, and a water reservoir for storing water purified by the water purifier. A container, a heater for heating water in the water storage container, the water supply port opened above the water storage container and discharging purified water into the water storage container, a main body including the water storage container, and a water purification unit. A water outlet for discharging purified water to the outside of the main body, a switching valve for selectively switching an outlet of the water purified by the water purification unit to one of the water supply port and the water discharge port, and provided in the water storage container. A water outlet for taking out hot water in the water storage container, a pump for feeding hot water taken out from the water intake to the outside of the main body, a water outlet corresponding to the water outlet, and a discharge unit provided with the water outlet and the water outlet. The main body is a water receiving unit Follicles and, and with placing the discharge unit to the water cradle unit top, on waterways connecting the said water inlet and said switching valve, and a second water outlet,
A water receiving portion for receiving water discharged from the second water outlet, and an overflow channel for overflowing water from the water receiving portion to a water receiving pedestal, wherein the second water outlet, the water receiving portion, The overflow channel is located on the upper surface of the water basin unit, so even if water is continuously supplied into the water storage container for a long time, it can be drained to the water basin without a pump or control circuit, and the area around the kitchen The damage done can be reduced.

According to a ninth aspect of the present invention, in the seventh aspect, the second water outlet, the water receiving portion, and the overflow channel are included in the discharge unit, so that the appearance on the water receiving unit is uncomfortable. It can be neat and clean. Further, the number of holes penetrating the water receiving unit top can be minimized.

According to a tenth aspect of the present invention, in accordance with the seventh or eighth aspect, the switching valve is provided near the second water outlet, the water receiving portion, and the overflow channel, and is disposed on the upper surface of the kitchen unit. In addition, the number of pipes connecting the discharge unit and the main body can be reduced as compared with the invention of the eighth aspect, and the construction becomes easy.

The invention according to claim 11 is the invention according to claims 1 to 9
In the above, the vacuum breaker is provided on the water channel connecting the water supply port or the second water discharge port and the water pipe, so that even if the pressure in the water pipe becomes negative pressure, the water in the water storage tank does not easily flow backward. The distance between the mouth and the water surface in the water storage tank or the distance between the second water outlet and the water surface in the water receiving portion can be reduced.

According to a twelfth aspect of the present invention, in the first to eleventh aspects, a steam release port for releasing generated steam is provided at an upper portion of the water storage container.

According to a thirteenth aspect of the present invention, the water receiving unit is a kitchen unit.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a case where the hot water supply device is used for a kitchen unit which is a water receiving unit will be described. Further, the same functions as those in the embodiment are denoted by the same reference numerals.

(Embodiment 1) FIG. 1 is a cross-sectional view showing a configuration in which a water heater according to a first embodiment of the present invention is used in a system kitchen. In FIG. 1, reference numeral 1 denotes a water pipe, and 8 denotes a water purification unit that purifies tap water branched from the water pipe 1 by a branch faucet 4. Here, a water stop valve 10 is provided on a water channel connecting the water pipe 1 and the water purification unit 8. The water purified by the water purification unit 8 is discharged from a water supply port 11 opened above the water storage container 2 and stored in the water storage container 2. The stored water is heated by the heater 12 to become hot water. Here, a switching valve 13 is provided on a water channel connecting the water supply port 11 and the water purification section 8, and thereby the purified water is discharged from the water discharge port 15 to the outside of the main body 14 including the water storage container 2. be able to. On the other hand, a water intake 16 for taking out hot water in the water storage container 2 is provided near the bottom surface of the water storage container 2, and the hot water taken out of the water intake 16 is discharged from the water outlet 6 to the outside of the main body 14 by a pump 17. Can be. The spout 15 and the tap 6 are both kitchen units 18
The discharge unit 19 is provided on the upper surface.
The tap 6 is open toward the kitchen sink 20 so that the hot water flows into the kitchen sink 20 without fail. The main body 14 is included in a kitchen unit 18. Further, the water storage container 2 is provided with an opening 21 below the water supply port 11 and above the water intake port 16, and is configured so that water in the water storage container 2 can overflow outside the water storage container 2. . Reference numeral 26 denotes a steam outlet for releasing steam generated in the water storage container 2;
Is a check valve, which prevents the water in the water purification section 8 or the water storage container 2 from flowing back to the water pipe when the inside of the water pipe 1 is in a negative pressure state.

The operation of water heating and water supply will now be described. Hot water heated in the water storage container 2, for example, 90 to 95 ° C.
Hot water is discharged from the tap hole 6 by the pump 17, and the water level in the water storage container 2 decreases. This is detected by the water level detecting means 22 provided in the water storage container 2, and based on the result, the switching valve 13 is opened to the water supply port 11 side and the water stop valve 10 is opened to start water supply. This water supply amount is measured by the flow meter 23, and when a predetermined water supply amount is reached, the water stop valve 10 is closed. The water discharged from the water supply port 11 is temporarily stored in a water supply tray 24 provided in the water storage container 2 first. The stored water is guided to the vicinity of the bottom of the water storage container 2 by a drip pipe 25 provided on the bottom surface of the water supply tray 24. The introduced water does not mix with the existing hot water in the water storage container 2 due to a difference in specific gravity, stays in the separated state near the bottom of the water storage container 2, and is heated by the heater until it becomes hot water. At this time, the water intake 16 is installed at a position corresponding to the amount of water supplied into the water storage container 2 at a time, that is, above the upper limit position of water staying near the bottom of the water storage container 2. No water is taken out. Therefore, only hot water is discharged from the tap 6 at any time. Further, since the water in the water storage container 2 is heated in the space opened to the atmosphere, the pressure hardly increases, and
Hot water does not erupt. Also, only the hot water of the same height as the water level in the water storage container 2 remains in the water channel connecting the tap hole 6 and the water storage container 2, and the heat radiation in the water channel is extremely small. Can be put out. Further, since the tapping-type tapping water is supplied by the pump 17, a predetermined tapping flow rate can be obtained regardless of a change in tap water pressure. In addition, the shortage of the hot water when the hot water is stopped is improved due to the short water path from the pump to the tap hole and the large water head pressure in the water path due to the water in the water reservoir 2 being released to the atmosphere. .

When the water stop valve 10 causes a water stoppage failure, water is continuously supplied into the water storage container 2. At this time, the water in the water storage container 2 overflows from the opening 21 to the outside of the water storage container 2, and the space distance between the water surface in the water storage container 2 and the water supply port 11 is maintained at a certain value or more. Therefore, even if the inside of the water pipe 1 becomes negative pressure for some reason and the check valve 34 does not function, the water in the water storage container 2 does not flow back to the water pipe 1. Reference numeral 27 shown in the figure is a valve which is easily opened by the pressure of overflowing water, and normally prevents steam from leaking out of the water storage container 2 in a closed state.

As described above, according to the present invention, the water can be heated in the open type water storage container while the water is supplied directly to the water supply, so that the usability can be improved. In addition, even if the inside of the water pipe 1 is in a negative pressure state for some reason and the check valve 34 does not function, it is possible to realize a hot water supply apparatus that can prevent the water in the water storage container from flowing back to the water pipe. . In the present embodiment, the water purification unit and the main body are separated from each other, but the same effect can be obtained even if the water purification unit is included in the main body together with the water storage container. The same can be said for all the embodiments described below.

In the present embodiment, the water purified in the water purifying section can be taken out. However, when it is not necessary to take out the water, a switching valve and a water discharge port related thereto are not required.

In this embodiment, the main body is provided.
This is not necessary.

(Embodiment 2) FIG. 2 is a cross-sectional view showing a configuration in which a water heater according to a second embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Therefore, the same reference numerals are given to the same functions, and only different parts will be described. In FIG. 2, reference numeral 28 denotes a flow control valve which is provided on a water channel connecting the water pipe 1 and the water supply port 11. Reference numeral 29 denotes overflow detecting means provided near the bottom surface inside the main body 14. Here, the flow regulating valve 28 is set so that the maximum discharge flow rate of the pump 17 is larger than the maximum flow rate of water supplied from the water supply port 11.

The operation will be described. When the water stop valve 10 causes poor water stoppage and water is continuously supplied into the water storage container 2, the water overflows from the opening 21 to the outside of the water storage container 2. The overflowed water flows to the bottom of the main body 14 and is detected by the overflow detecting means 29. When the overflow is detected, the pump 1 is controlled by the control circuit.
7 is operated, and the water in the water storage container 2 is drained from the tap 6 to the kitchen sink 20. At this time, since the amount of water supplied from the water supply port 11 is smaller than the amount of water discharged to the outside by the pump 17, the water level in the water storage container 2 eventually falls, and the overflow from the opening 21 stops. Therefore, only a small amount of water overflows from the water storage container 2 to the outside, and damage to the vicinity of the kitchen of the house is extremely reduced. For example, if the main body 14 is made of a container with improved water resistance, damage to the periphery of the kitchen can be eliminated.

As described above, according to the present invention, it is possible to prevent the amount of water in the water storage tank from flowing out to a small amount when the water stop valve is improperly stopped, so that damage to the periphery of the kitchen is extremely small. be able to.

In this embodiment, the case where the overflow detecting means is provided at the lower part of the main body is described. However, when the main body is not used, a container for receiving the overflow is provided at the lower part of the opening and the overflow detecting means is provided there. Alternatively, it is necessary to provide an overflow detection means in a part of the opening so as not to be particularly affected by the dew condensation water.

(Embodiment 3) FIG. 3 is a cross-sectional view showing a configuration in which a water heater according to a third embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Therefore, the same reference numerals are given to the same functions, and only different parts will be described. In FIG. 3, reference numeral 28 denotes a flow control valve provided on a water channel connecting the water pipe 1 and the water supply port 11. Reference numeral 22 denotes a water level detecting means that can detect a water level k immediately below the opening 21. Here, the pump 17
The flow control valve 28 is set so that the maximum discharge flow from the water supply port 11 is larger than the maximum discharge flow from the water supply port 11.
Further, the water level m is a water supply stop water level, and is usually set so that the water level does not rise above this level.

The operation will be described. If the water stop valve 10 causes a water stoppage and water is continuously supplied into the water storage container 2, the water level in the water storage container 2 exceeds the water supply stop water level m, and eventually the water level k
Reach When the water level detecting means 22 detects the water level k, the pump 17 is operated by the control circuit, and the water in the water storage container 2 is drained from the tap 6 to the kitchen sink 20. At this time, since the amount of water supplied from the water supply port 11 is smaller than the amount of water discharged to the outside by the pump 17, the water does not overflow from the opening 21 outside the water storage container 2. Therefore, damage to the periphery of the kitchen can be eliminated.

As described above, according to the present invention, it is possible to prevent the water in the water storage container from flowing out to the outside when the water shutoff valve is improperly shut off, so that damage to the periphery of the kitchen can be eliminated.

(Embodiment 4) FIG. 4 is a sectional view showing a configuration in which a water heater according to a fourth embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Therefore, the same reference numerals are given to the same functions, and only different parts will be described. In FIG. 4, reference numeral 28 denotes a flow control valve provided on a water channel connecting the water pipe 1 and the water supply port 11. Numeral 22 denotes a water level detecting means which also functions as a water rising detecting means, and detects a water supply stop water level m, a water rising water level n which indicates that the water has risen beyond the water supply stop water level m, and a water level k just below the opening 21. Can be. Here, the pump 17
The flow control valve 28 is set so that the maximum discharge flow rate is larger than the maximum discharge flow rate from the water supply port 11.
In addition, it is usually set so that the water level does not rise above the water level m.

The operation will be described. When the water stop valve 10 causes water stoppage failure and water is continuously supplied into the water storage container 2, the water level in the water storage container 2 exceeds the water supply stop water level m and reaches the rising water level n. Here, the control circuit stops the heater input based on the output of the water level detecting means 22, and stops heating the water in the water storage container. With continuous water supply, the water level rises further and eventually reaches the water level k. When the water level detecting means 22 detects the water level k, the pump 17 is operated by the control circuit, and the water storage container 2
The water inside is drained from the tap 6 to the kitchen sink 20. At this time, since the temperature of the hot water in the water storage container that has been heated in advance is lowered by continuous water supply, the hot water can be safely discharged even when the user is working around the kitchen sink. Further, since the amount of water supplied from the water supply port 11 is smaller than the amount of water discharged to the outside by the pump 17, the water does not overflow from the opening 21 to the outside of the water storage container 2. Therefore, damage to the periphery of the kitchen can be eliminated. The drainage temperature can be adjusted by the ratio of the distance between the rising water level n and the water level k and the distance between the rising water level n and the bottom of the container.

As described above, according to the present invention, it is possible to safely discharge water to the kitchen sink after lowering the water temperature when the water stop valve has poor water stoppage. In the present embodiment, the water increase detecting means 42 is also used as the water level detecting means. However, the function may be made independent from the water level detecting means. For example, a switch using a float, a switch using the presence or absence of conduction between the electrodes, a switch using a displacement due to the magnitude of water pressure, and the like are similar thereto.

(Embodiment 5) FIG. 5 is a sectional view showing a configuration in which a water heater according to a fifth embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Therefore, the same reference numerals are given to the same functions, and only different parts will be described. In FIG. 5, reference numeral 36 denotes a drain pipe, which is provided in the kitchen sink 20 and serves to feed sewage used for cooking and washing to the sewer.
The drain pipe 36 is provided with a branch pipe 37, and the opening 21 and the drain pipe 36 are indirectly connected to each other at a predetermined distance at the joint 40. Numeral 38 denotes a check valve which functions to flow water from the opening 21 to the drain pipe 36 and to stop water in the opposite direction.

The operation will be described. When the water stop valve 10 has poor water stoppage, the water supply to the water storage container 2 is continuously performed, and eventually the water level reaches the opening 21 and overflows from the opening 21. The overflowed water passes through a check valve 38 and drains 36
Leaks to Even if this overflow water is hot water, it does not touch the user at all, so that it can be safely drained to the drain pipe without any special means. The check valve 38 prevents sewage from flowing in the water channel 39 in the direction of the opening 38, thereby preventing the water in the water storage container 2 from being contaminated.

As described above, according to the present invention, the water overflowing from the water storage container can be safely and directly flown to the drain pipe without providing any special detection means or drainage means, and damage to the periphery of the kitchen is eliminated. be able to.

(Embodiment 6) FIG. 6 is a sectional view showing a configuration in which a water heater according to a sixth embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Therefore, the same reference numerals are given to the same functions, and only different parts will be described. In FIG. 6, reference numeral 21 denotes an opening provided in the water storage container 2 for overflowing water in the water storage container to the outside of the water storage container, and is provided near the bottom surface of the water storage container 2. 3
Reference numeral 3 denotes an overflow channel connected to the opening 21, the uppermost position of which is located above the water level in the water storage container in a normal use state and below the water supply port. At this time, water in the water storage container 2 enters the inside of the overflow channel 33, and a water surface 43 having the same water level as the water surface 44 in the water storage container is formed. With this configuration, the water reservoir 2 is provided at the overflow pipe 33.
There is no direct heat radiation from the water surface 44 inside. However, heat is generated from the newly formed water surface 33,
Since the area of the water surface is much smaller than that of the water surface 44, the amount of heat radiation can be reduced.

As described above, according to the present invention, since no direct heat radiation occurs from the water surface in the water reservoir in the overflow pipe, the amount of heat radiation can be reduced.

(Embodiment 7) FIG. 7 is a sectional view showing a configuration in which a water heater according to a seventh embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Therefore, the same reference numerals are given to the same functions, and only different parts will be described. In FIG. 7, the switching valve 1
A second water outlet 30 is provided on a water channel connecting the water supply port 3 and the water supply port 11.
A water receiver 31 for receiving water discharged from the second water outlet 30, a water supply passage 32 connecting the water receiver 31 and the water supply port 11, and overflowing water from the water receiver 31 into the kitchen sink 20. A flood channel 33 is provided. Further, the second spout 30, the water receiving portion 31, and the overflow channel 33 are arranged on the kitchen unit upper surface.

The operation will be described. When the water stop valve 10 causes poor water stoppage and continuously supplies water into the water storage container 2, the water level in the water storage container 2 rises and eventually flows back through the water supply passage 32 to reach the water receiving portion 31. When the water supply further proceeds, the water flows into the kitchen sink 20 from the overflow channel 33 provided in the water receiving portion 31, and the water level in the water receiving portion 31 is eventually stabilized. At this time, the spatial distance between the second water outlet 30 and the water surface in the water receiver 31 is maintained at a certain value or more. Therefore, even if the inside of the water pipe 1 becomes a negative pressure state for some reason and the check valve does not function, the water in the water storage container 2 does not flow back to the water pipe 1.

As described above, according to the present invention, when a water stoppage of the water stop valve occurs, even if the inside of the water pipe becomes a negative pressure state for some reason and the check valve does not function, the water is not stored. It is possible to prevent the water in the container from flowing back to the water pipe. Further, since the water can be drained to the kitchen sink without a pump or a control circuit, damage to the periphery of the kitchen can be eliminated with a simple configuration.

(Eighth Embodiment) FIG. 8 is a sectional view showing a configuration in which a hot water supply apparatus according to an eighth embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Since it is the same as in the seventh embodiment, the same functions are denoted by the same reference numerals, and only different parts will be described. In FIG. 8, the second water outlet 30, the water receiver 31, and the overflow channel 33 are included in the discharge unit 19.

In this configuration, when the water stoppage of the water stop valve 10 occurs, the inside of the water pipe 1 becomes in a negative pressure state for some reason and the check valve 34 does not function. The operation of preventing the water inside from flowing back to the water pipe 1 is the same as in the fifth embodiment. In addition, the apparent structure on the kitchen unit can be reduced by one, that is, only the discharge unit can be used. Accordingly, the number of holes passing through the kitchen unit top plate can be reduced by one.

As described above, according to the present invention, the appearance on the kitchen unit can be made clear without discomfort, and the number of holes penetrating the kitchen unit top plate can be minimized.

(Embodiment 9) FIG. 9 is a sectional view showing a configuration in which a hot water supply apparatus according to a ninth embodiment of the present invention is used in a system kitchen. The basic configuration and operation are described in Example 1.
Since it is the same as in the seventh embodiment, the same functions are denoted by the same reference numerals, and only different parts will be described. In FIG. 9, the switching valve 13 is provided near the second water outlet 30, the water receiver 31, and the overflow channel 33 inside the discharge unit 19.

In this configuration, when the water stoppage of the water stop valve 10 occurs, the inside of the water pipe 1 becomes a negative pressure state for some reason and the check valve 34 does not function. The operation of preventing the water inside from flowing back to the water pipe 1 is the same as in the seventh and eighth embodiments. Further, Example 8
As compared with the above, the number of pipes connecting the discharge unit and the main body can be reduced.

As described above, according to the present invention, since the number of pipes can be reduced, the construction is facilitated.

(Embodiment 10) FIG. 10 is a sectional view showing a configuration in which a water heater according to a tenth embodiment of the present invention is used in a system kitchen. Since the basic configuration and operation are the same as those of the seventh embodiment, the same functions are denoted by the same reference numerals and only different parts will be described. In FIG. 10, 41
Is a vacuum breaker. The vacuum breaker normally keeps a closed state, but when the water pipe becomes negative pressure, the water channel 42 becomes negative pressure, and the opening of the vacuum breaker opens accordingly. Then, since air is sucked from the two places of the second water outlet 30 and the opening 43, even if the distance d to the water surface in the water receiving part 31 is smaller than that in the sixth embodiment, the water in the water receiving part is sucked. I will not do it. Therefore, miniaturization is possible. Although not shown, if a vacuum breaker is provided on the water channel connecting the water supply port 11 and the water pipe 1 in FIG. 2, the distance between the water supply port 11 and the water surface in the water storage container 2 can be set small from the same reason. Become like At this time, the size of the water storage container 2 can be reduced, and thus the size of the main body 14 can be reduced.

As described above, according to the present invention, it is difficult for the water in the water storage tank to flow backward even if the pressure in the water pipe becomes negative, and the distance between the water supply port and the water surface in the water storage tank or the second water discharge port The distance from the water surface in the water receiving portion can be reduced.

In the first to tenth embodiments, the case where the steam release port 26 is used has been described.
When the opening 21 for overflowing the water is provided, the steam release port 26 is not necessarily required. However, in this case, the opening is cooled so as to prevent steam from leaking from the opening 21 in order to prevent steam from leaking from the opening 21 and to prevent the dew condensation water from leaking to the outside. It is preferable to make it easier or to provide an inclination so that the dew condensation water drops inside.

Further, in the above embodiment, the case where the hot water supply apparatus of the present invention is a kitchen unit as the water receiving unit has been described. However, the present invention is not limited to this. Of course, it may be used.

[0054]

As described above, according to the first to tenth aspects of the present invention, since water can be heated in an open-type water storage container while water is supplied by direct water supply, not only convenience is improved, It is possible to reliably prevent the water in the water storage tank from flowing back to the water pipe, and at the same time, to prevent damage to the surroundings of the kitchen due to overflow.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a configuration in which a water heater according to a first embodiment of the present invention is used in a system kitchen.

FIG. 2 is a cross-sectional view of a configuration in which a water heater according to a second embodiment of the present invention is used in a system kitchen.

FIG. 3 is a sectional view of a configuration in which a water heater according to a third embodiment of the present invention is used in a system kitchen.

FIG. 4 is a sectional view showing a configuration in which a hot water supply apparatus according to a fourth embodiment of the present invention is used in a system kitchen;

FIG. 5 is a sectional view of a configuration in which a water heater according to a fifth embodiment of the present invention is used in a system kitchen.

FIG. 6 is a sectional view of a configuration in which a water heater according to a sixth embodiment of the present invention is used in a system kitchen.

FIG. 7 is a sectional view of a configuration in which a water heater according to a seventh embodiment of the present invention is used in a system kitchen.

FIG. 8 is a sectional view of a configuration in which a water heater according to an eighth embodiment of the present invention is used in a system kitchen.

FIG. 9 is a sectional view of a configuration in which a hot water supply apparatus according to a ninth embodiment of the present invention is used in a system kitchen.

FIG. 10 is a sectional view of a configuration in a case where a hot water supply device according to a tenth embodiment of the present invention is used in a system kitchen.

FIG. 11 is a sectional view of a configuration in a case where a conventional hot water supply device is used in a system kitchen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water pipe 2 Water storage container 6 Outlet 8 Water purifier 10 Water stop valve 11 Water supply port 12 Heater 13 Switching valve 14 Main body 15 Water outlet 16 Water intake 17 Pump 18 Kitchen unit 19 Discharge unit 20 Kitchen sink 21 Opening 22 Water level detecting means 26 Steam Release Port 28 Flow Rate Control Valve 29 Overflow Detection Means 30 Second Water Outlet 31 Water Receiving Part 33 Overflow Channel 36 Drain Pipe 38 Check Valve 39 Water Channel 41 Vacuum Breaker 42 Water Increase Detection Means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Futa Hiromatsu 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 2D060 BA05 BC02 BC11 BC14 BC21 BC23 BC25 CD09 4D024 AA02 CA13 CA14 CA15 CA16

Claims (13)

[Claims] 1. A water purifier for purifying tap water, a water stop valve provided on a water channel connecting a water pipe and the water purifier, a water reservoir for storing water purified by the water purifier, and the water reservoir. A heater for heating the water inside, a water supply port provided above the water storage container for discharging purified water into the water storage container, a pump for pumping hot water from the water storage container, and an outlet for discharging hot water pumped by the pump. A hot water supply apparatus comprising: a gate, and an opening through which water in the water storage container overflows to the outside of the water storage container, wherein the opening is provided below the water supply opening. 2. A water purifier for purifying tap water, a water stop valve provided on a water channel connecting a water pipe and the water purifier, a water reservoir for storing water purified by the water purifier, and the water reservoir. A heater for heating water in the water reservoir, a water supply opening that opens above the water storage container and discharges purified water into the water storage container, a main body including the water storage container, and the water purified by the water purification unit. A water discharge port for discharging water to the outside, a switching valve for selectively switching an outlet of water purified by the water purification section to one of the water supply port and the water discharge port, and a water supply port provided in the water storage container. A water outlet for taking out hot water, a pump for feeding hot water taken out from the water intake to the outside of the main body, a water outlet corresponding to a hot water outlet, and a discharge unit provided with the water outlet and the water outlet; Is contained in the water cradle unit, and The water supply device is configured such that the discharge unit is disposed on the upper surface of the water receiving unit, and the water storage container is provided with an opening below the water supply port for allowing water in the water storage container to overflow outside the water storage container. . 3. A flow control valve provided on a water channel connecting a water pipe and a water supply port, overflow detecting means provided outside the reservoir for detecting the presence of water, and a pump based on an output of the overflow detecting means. And a control circuit for driving the pump, wherein a water supply amount per unit time supplied from the water supply port to the water storage container is set smaller than a water discharge amount per unit time discharged from the water storage container by the pump. The hot water supply device according to claim 1 or 2, wherein 4. A flow control valve provided on a water channel connecting a water pipe and a water supply port, water level detecting means for detecting a water level in a water storage container, and control for driving a pump based on an output of the water level detecting means. And a circuit, wherein a water supply amount per unit time supplied from the water supply port to the water storage container is set to be smaller than a water discharge amount per unit time discharged from the water storage container by the pump. 4. The hot water supply device according to any one of 1 to 3. 5. A water supply stop water level for stopping water supply into the water storage container, a water increase detection means for detecting that the water supply is higher than the water supply stop water level, and a control circuit for stopping a heater input based on an output of the water increase detection means. The hot water supply apparatus according to any one of claims 1 to 4, having a configuration having: 6. An opening through which water in the water storage container overflows to the outside of the water storage container is connected to a drain pipe provided in a water receiving pedestal, and a water passage connecting the opening and the drain pipe has a reverse. 3. The hot water supply device according to claim 1, wherein a stop valve is provided. 7. An opening for overflowing water in the water storage container to the outside of the water storage container is provided near a bottom surface of the water storage container, and an uppermost position of the overflow channel connected to the opening is the normal position in the normal use state. It is located above the water level in the water storage container,
The hot water supply apparatus according to any one of claims 1 to 6, wherein the hot water supply apparatus is configured to be disposed below a water supply port. 8. A water purifier for purifying tap water, a water stop valve provided on a water channel connecting a water pipe and the water purifier, a water reservoir for storing water purified by the water purifier, and the water reservoir. A heater for heating water in the water reservoir, the water supply opening which opens above the water storage container and discharges purified water into the water storage container, a main body including the water storage container, and a water purified by the water purification unit. A water outlet for discharging water, a switching valve for selectively switching an outlet of water purified by the water purifier to either the water supply port or the water discharge port, and a hot water provided in the water storage container and provided in the water storage container. A water outlet for taking out water, a pump for feeding hot water taken out from the water intake to the outside of the main body, a water outlet corresponding to the water outlet, and a discharge unit provided with the water outlet and the water outlet. Included in the cradle unit and the discharge unit A knit is disposed on the upper surface of the water receiving unit, and a second water outlet and a water receiver for receiving water discharged from the second water outlet are provided on a channel connecting the switching valve and the water inlet. And a flood channel for overflowing the water of the water receiving portion to a water receiving basin, wherein the second water outlet, the water receiving portion, and the flood channel are disposed on a water receiving basin unit upper surface. Water heater. 9. The hot water supply apparatus according to claim 8, wherein the second water outlet, the water receiving portion, and the overflow channel are included in the discharge unit. 10. The hot water supply apparatus according to claim 8, wherein the switching valve is provided near the second water outlet, the water receiving portion, and the overflow channel, and is disposed on the upper surface of the water receiving unit. 11. The hot water supply apparatus according to claim 1, wherein a vacuum breaker is provided on a water channel connecting the water supply port or the second water discharge port to the water pipe. 12. The hot water supply apparatus according to claim 1, wherein a steam release port for releasing generated steam is provided at an upper portion of the water storage container. 13. The hot water supply apparatus according to claim 2, wherein the water receiving unit is a kitchen unit.