Water supply device

Abstract

The utility model is suitable for the technical field of water supply equipment, and discloses a water supply device which comprises a waterway board, a hot tank, a heat exchanger and a heater. The waterway plate is provided with a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is used for communicating a water source with the heat exchanger, and the water outlet pipeline is used for communicating the water using end with the heater. The heat tank is used for storing a heat exchange medium and communicates with the heat exchanger. And the heat exchanger is used for allowing the heat exchange medium from the hot tank and the drinking water from the water inlet pipeline to flow through simultaneously and separately, and enabling the heat exchange medium in the heat exchanger and the drinking water to exchange heat. The heater is arranged on the downstream of the heat exchanger and used for heating the flowing drinking water and conveying the heated drinking water to the water outlet pipeline. According to the water supply device, drinking water can be heated twice, the heating effect on the drinking water is greatly improved, drinking hot water can flow out in a large flow mode, the drinking hot water does not need to be heated and stored in advance, and in other words, the outlet water is fresh hot water.

Description

Technical Field

[0001] This utility model relates to the field of water supply equipment technology, and in particular to a water supply device. Background Technology

[0002] As living standards continue to improve, people's requirements for drinking water are also constantly increasing. Water supply devices, as water treatment equipment that can filter and heat water, are gradually being widely used. However, due to design limitations, the heating effect of drinking water in related technologies is not good. Either it cannot achieve a large flow of hot water for drinking, or the hot water is preheated and stored for use, meaning the output water is stored hot water. Utility Model Content

[0003] This application provides a water supply device aimed at solving the technical problem of poor heating effect of existing devices for drinking water.

[0004] According to a first aspect of this application, one embodiment provides a water supply device, including a water circuit board, a heat tank, a heat exchanger, and a heater;

[0005] The water circuit board is provided with an inlet pipe and an outlet pipe. The inlet pipe is used to connect the water source and the heat exchanger, and the outlet pipe is used to connect the water user and the heater.

[0006] The hot tank is used to store the heat exchange medium and is connected to the heat exchanger; the heat exchanger is used to allow the heat exchange medium from the hot tank and the drinking water from the inlet pipe to flow through simultaneously and in isolation, and to allow the heat exchange medium and the drinking water located in the heat exchanger to exchange heat; the heater is located downstream of the heat exchanger and is used to heat the flowing drinking water and to transfer the heated drinking water to the outlet pipe.

[0007] In one embodiment, the water circuit board further includes a water guide branch, which connects the water outlet pipe and the hot tank, so that drinking water heated by the heater can flow into the hot tank; wherein the heat exchange medium is water.

[0008] In one embodiment, the water circuit board further includes a wastewater pipeline and a first pump body, wherein the wastewater pipeline is connected to the hot tank and is used to discharge wastewater from the hot tank;

[0009] The first pump body is connected to the wastewater pipeline to provide power for the flow of water within the wastewater pipeline.

[0010] In one embodiment, the water circuit board further includes a back suction pipe and a three-way valve;

[0011] The back suction pipe is used to connect the water supply end and the wastewater pipe, and the three-way valve is used to control the connection between the wastewater pipe and the hot tank or the connection between the wastewater pipe and the back suction pipe.

[0012] In one embodiment, the water circuit board further includes a first valve body and a second valve body;

[0013] The first valve body is located in the water outlet pipe and is used to control the connection or disconnection between the water outlet pipe and the water-using end; the second valve body is located between the water outlet pipe and the water guide branch and is used to control the connection or disconnection between the water outlet pipe and the water guide branch.

[0014] In one embodiment, the water circuit board further includes a medium output pipeline and a medium return pipeline;

[0015] The medium output pipeline connects the hot tank and the heat exchanger, and is used to transport the heat exchange medium in the hot tank to the heat exchanger; the medium return pipeline connects the heat exchanger and the hot tank, and is used to return the heat exchange medium flowing through the heat exchanger to the hot tank.

[0016] In one embodiment, the water circuit board further includes a second pump body;

[0017] The second pump body is connected to the medium output pipeline and is used to provide power for the flow of the heat exchange medium in the medium output pipeline.

[0018] In one embodiment, the heat exchanger is provided with a medium flow channel and a drinking water flow channel that are isolated from each other;

[0019] One end of the medium flow channel is connected to the medium output pipeline, and the other end of the medium flow channel is connected to the medium return pipeline; one end of the drinking water flow channel is connected to the water inlet pipeline, and the other end of the drinking water flow channel is connected to the heater; the flow direction of the heat exchange medium in the medium flow channel is opposite to the flow direction of the drinking water in the drinking water flow channel.

[0020] In one embodiment, the inlet pipe is also connected to the outlet pipe;

[0021] The water circuit board also includes a third valve body and a fourth valve body. The third valve body is located between the inlet pipe and the heat exchanger and is used to control the connection or disconnection between the inlet pipe and the heat exchanger. The fourth valve body is located between the inlet pipe and the outlet pipe and is used to control the connection or disconnection between the inlet pipe and the outlet pipe.

[0022] In one embodiment, the water circuit board further includes an exhaust pipe connected to the hot tank for discharging steam from the hot tank.

[0023] According to the water supply device of the above embodiment, the drinking water can be heated for the first time by setting a heat tank and a heat exchanger, and the drinking water can be heated for the second time by setting a heater. By heating the drinking water twice, the heating effect of the drinking water is greatly improved, and a large flow of drinking hot water can be produced. The drinking hot water does not need to be preheated and stored, that is, the water output is always "fresh" hot water. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the water supply device provided in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the water supply device provided in this embodiment of the present invention after removing the outer shell;

[0027] Figure 3 This is a schematic diagram of the water channel plate provided in one embodiment of the present utility model.

[0028] Figure 4 This is a structural schematic diagram of the water channel plate provided in another embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the hot water tank provided in this embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the heat exchanger provided in an embodiment of the present invention.

[0031] Explanation of icon numbers:

[0032] 100. Water supply device; 10. Water circuit board; 111. Inlet pipe; 112. Outlet pipe; 113. Water guide branch; 114. Wastewater pipe; 115. Back suction pipe; 116. Medium output pipe; 117. Medium return pipe; 118. Exhaust pipe; 119. Drainage pipe; 121. First pump body; 122. Second pump body; 123. First valve body; 124. Second valve body; 125. Third valve body; 126. Fourth valve body; 127. Three-way valve; 20. Heat tank; 21. Water inlet; 22. Drain outlet; 23. Medium outlet; 24. Medium return outlet; 25. Exhaust outlet; 30. Heat exchanger; 31. Medium inlet; 32. Medium outlet; 33. Drinking water inlet; 34. Drinking water outlet; 40. Heater; 50. Outer casing.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0036] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0037] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0038] Water supply devices, as water treatment equipment that can filter and heat water, are becoming increasingly popular. However, in some technologies, water supply devices are not very effective at heating drinking water, thus failing to provide a large flow of hot water. Furthermore, some water supply devices do not output "fresh" hot water, but rather preheated and stored hot water, meaning the output water is stored hot water.

[0039] In view of this, the present invention provides a water supply device for improving the heating effect of drinking water.

[0040] like Figures 1 to 3 As shown, the water supply device 100 provided in this embodiment of the present invention includes a water circuit board 10, a heat tank 20, a heat exchanger 30, and a heater 40. The water circuit board 10 is provided with an inlet pipe 111 and an outlet pipe 112. The inlet pipe 111 connects a water source to the heat exchanger 30, and the outlet pipe 112 connects a water-using end (e.g., a faucet) to the heater 40. The heat tank 20 stores the heat exchange medium and is connected to the heat exchanger 30. The heat exchanger 30 allows the heat exchange medium from the heat tank 20 and drinking water from the inlet pipe 111 to flow simultaneously and separately, facilitating heat exchange between the heat exchange medium and the drinking water within the heat exchanger 30. The heater 40 is located downstream of the heat exchanger 30 and heats the flowing drinking water, then transfers the heated drinking water to the outlet pipe 112. The heat exchange medium, after exchanging heat with the drinking water within the heat exchanger 30, flows back to the heat tank 20.

[0041] In use, drinking water flows into the heat exchanger 30 through the inlet pipe 111. After heat exchange with the heat exchange medium in the heat exchanger 30, it generates first hot water with a first temperature. Then, it flows from the heat exchanger 30 into the heater 40, where the heater 40 heats the first hot water to generate second hot water with a second temperature. The second hot water then flows to the water user through the outlet pipe 112. The second temperature is usually higher than the first temperature.

[0042] By adopting the above technical solution, the drinking water can be heated for the first time by setting up the hot tank 20 and the heat exchanger 30, and the drinking water can be heated for the second time by setting up the heater 40. By heating the drinking water twice, the heating effect of the drinking water is greatly improved, and a large flow of hot water can be produced. The hot water does not need to be preheated and stored, that is, the water is always "fresh" hot water.

[0043] In one embodiment, the heat exchange medium can be water, heat transfer oil, or other heat-conducting media. The water source can be purified water filtered through a reverse osmosis membrane.

[0044] Please see Figure 2 , Figure 4 and Figure 5The water circuit board 10 also includes a water guide branch 113, which connects the outlet pipe 112 and the heat tank 20, so that drinking water heated by the heater 40 can flow into the heat tank 20; wherein, the heat exchange medium is water. Since hot water will evaporate at high temperature, the amount of liquid water will decrease. By setting the water guide branch 113 to connect the outlet pipe 112 and the heat tank 20, water can be added to the heat tank 20 when the heat exchange medium in the heat tank 20 decreases. Furthermore, when no heating device for heating the heat exchange medium is installed in the hot tank 20, after the heat exchange medium returns to the hot tank 20 after heat exchange, as the amount of returning heat exchange medium increases, the heat exchange medium in the hot tank 20 becomes a low-temperature heat exchange medium that cannot be reused. In this case, the connection between the hot tank 20 and the heat exchanger 30 can be disconnected, and the low-temperature heat exchange medium in the hot tank 20 can be discharged from the hot tank 20. Hot water heated by the heater 40 can then be supplied to the hot tank 20 through the water outlet pipe 112 and the water guide branch 113. In this way, the heater 40 can also provide a high-temperature heat exchange medium to the hot tank 20. Specifically, the hot tank 20 is provided with a water inlet 21, and the water guide branch 113 is connected to the water inlet 21 to supply water to the hot tank 20. In practical applications, when the water outlet is closed (i.e., the water outlet is stopped), the hot tank 20 can be controlled to replace the high-temperature heat exchange medium heated by the heater 40.

[0045] Please see Figure 2 , Figure 3 and Figure 5 The water circuit board 10 also includes a wastewater pipe 114 and a first pump body 121. The wastewater pipe 114 is connected to the heat tank 20 and is used to discharge wastewater from the heat tank 20. The first pump body 121 is connected to the wastewater pipe 114 and provides power for the flow of water within the wastewater pipe 114. In this way, the low-temperature heat exchange medium inside the heat tank 20 can be discharged from the heat tank 20. Specifically, the heat tank 20 is provided with a drain outlet 22, and the water circuit board 10 also includes a drain pipe 119, which is connected between the wastewater pipe 114 and the drain outlet 22 to transport the heat exchange medium inside the heat tank 20 to the wastewater pipe 114.

[0046] Please see Figure 1 and Figure 3The water circuit board 10 also includes a back suction pipe 115, which connects the water supply end and the wastewater pipe 114. This allows the wastewater pipe 114 to discharge water from the pipe at the water supply end. Typically, the water supply device 100 can supply drinking water at at least two temperatures. In related technologies, when switching from one water supply mode to another, a certain amount of water from the previous supply mode is stored in the pipe at the water supply end. This water needs to be released from the water supply end before the new supply mode is supplied. For example, when switching from a hot water supply mode (delivering hot water to the water supply end through the pipe at the water supply end) to a room temperature water supply mode (delivering room temperature water to the water supply end through the pipe at the water supply end), a certain amount of hot water is stored in the pipe at the water supply end. This hot water needs to be released from the water supply end before room temperature water is supplied, resulting in a poor user experience. By setting up a back suction pipe 115 to connect the water supply end and the wastewater pipe 114, when changing the water supply mode, the water from the previous water supply mode can flow back into the back suction pipe 115 and then be discharged through the wastewater pipe 114. This eliminates the need to discharge the water from the water supply end, greatly improving the user experience.

[0047] Please see Figures 2 to 4 The water circuit board 10 also includes a three-way valve 127, which is used to control the connection between the wastewater pipe 114 and the hot tank 20 or between the wastewater pipe 114 and the return suction pipe 115. Specifically, one inlet of the three-way valve 127 is connected to the drain pipe 119, the other inlet of the three-way valve 127 is connected to the return suction pipe 115, and the outlet of the three-way valve 127 is connected to the wastewater pipe 114. Of course, in other embodiments, on / off valves can also be provided between the drain pipe 119 and the wastewater pipe 114, and between the return suction pipe 115 and the wastewater pipe 114.

[0048] Please see Figure 3 The water circuit board 10 also includes a first valve body 123 and a second valve body 124. The first valve body 123 is located in the water outlet pipe 112 and is used to control the connection or disconnection between the water outlet pipe 112 and the water-using end. The second valve body 124 is located between the water outlet pipe 112 and the water guide branch 113 and is used to control the connection or disconnection between the water outlet pipe 112 and the water guide branch 113. Specifically, the connection point between the water outlet pipe 112 and the water-using end is located downstream of the connection point between the water outlet pipe 112 and the water guide branch 113.

[0049] In specific implementation, when the first valve body 123 is opened and the second valve body 124 is closed, the water outlet pipe 112 is connected to the water-using end and disconnected from the water-guiding branch 113, so that the water flow in the water outlet pipe 112 can be delivered to the water-using end; when the first valve body 123 is closed and the second valve body 124 is opened, the water outlet pipe 112 is connected to the water-guiding branch 113 and disconnected from the water-using end, so that the water flow in the water outlet pipe 112 can be delivered to the water-guiding branch 113, and then delivered to the hot tank 20.

[0050] Please see Figure 2 , Figure 3 and Figure 5 The water circuit board 10 also includes a medium output pipe 116 and a medium return pipe 117. The medium output pipe 116 connects the heat tank 20 and the heat exchanger 30, and is used to transport the heat exchange medium in the heat tank 20 to the heat exchanger 30. The medium return pipe 117 connects the heat exchanger 30 and the heat tank 20, and is used to return the heat exchange medium flowing through the heat exchanger 30 to the heat tank 20. By setting the medium output pipe 116 and the medium return pipe 117, the heat tank 20 and the heat exchanger 30 are connected. Furthermore, by setting the medium output pipe 116 and the medium return pipe 117 on the water circuit board 10, the integration of the water circuit board 10 is improved. Specifically, the heat tank 20 also has a medium outlet 23 and a medium return port 24. The inlet end of the medium output pipe 116 is connected to the medium outlet 23, and the outlet end of the medium return pipe 117 is connected to the medium return port 24.

[0051] The heat exchanger 30 includes isolated media flow channels (not shown in the figure) and drinking water flow channels (not shown in the figure). One end of the media flow channel is connected to the media outlet pipe 116, and the other end is connected to the media return pipe 117. One end of the drinking water flow channel is connected to the inlet water pipe 111, and the other end is connected to the heater 40. For details, please refer to [reference needed]. Figure 3 and Figure 6 One end of the medium flow channel is provided with a medium inlet 31 and the other end with a medium outlet 32. The medium inlet 31 is connected to the outlet end of the medium outlet pipe 116, and the medium outlet 32 ​​is connected to the inlet end of the medium return pipe 117. One end of the drinking water flow channel is provided with a drinking water inlet 33 and the other end with a drinking water outlet 34. The drinking water inlet 33 is connected to the inlet pipe 111, and the drinking water outlet 34 is connected to the inlet end of the heater 40.

[0052] In one embodiment, the flow direction of the heat exchange medium in the medium channel is opposite to the flow direction of the drinking water in the drinking water channel. For example, the heat exchange medium flows from bottom to top in the medium channel, while the drinking water flows from top to bottom in the drinking water channel. This arrangement allows for sufficient heat exchange between the heat exchange medium and the drinking water, resulting in better heating of the drinking water.

[0053] Please see Figure 2 and Figure 3 The water circuit board 10 also includes a second pump body 122, which is connected to the medium output pipeline 116 and is used to provide power for the flow of the heat exchange medium within the medium output pipeline 116. It is understood that in other embodiments, the second pump body 122 may also be connected to the medium return pipeline 117. In specific applications, the pump body can be activated when it is necessary to heat drinking water through heat exchange, so that the heat exchange medium can flow between the heat tank 20 and the heat exchanger 30, thereby exchanging heat with the drinking water within the heat exchanger 30 as it flows through the heat exchanger 30.

[0054] In one embodiment, the inlet pipe 111 is also connected to the outlet pipe 112. Thus, the inlet pipe 111 can supply room temperature water to the outlet pipe 112. The inlet pipe 111 can supply drinking water to the heat exchanger 30 to generate hot water, and it can also supply room temperature water to the outlet pipe 112. The outlet pipe 112 can supply both hot and room temperature water, thereby improving the utilization rate of the inlet pipe 111 and the outlet pipe 112.

[0055] Please see Figure 2 and Figure 3 The water circuit board 10 also includes a third valve body 125 and a fourth valve body 126. The third valve body 125 is located between the inlet pipe 111 and the heat exchanger 30, and is used to control the connection or disconnection between the inlet pipe 111 and the heat exchanger 30. The fourth valve body 126 is located between the inlet pipe 111 and the outlet pipe 112, and is used to control the connection or disconnection between the inlet pipe 111 and the outlet pipe 112. In specific implementation, when the third valve body 125 is opened and the fourth valve body 126 is closed, the inlet pipe 111 is connected to the heat exchanger 30 and disconnected from the outlet pipe 112, thereby providing drinking water to the heat exchanger 30; when the third valve body 125 is closed and the fourth valve body 126 is opened, the inlet pipe 111 is connected to the outlet pipe 112 and disconnected from the heat exchanger 30, thereby delivering room temperature water to the outlet pipe 112.

[0056] Please see Figure 3 and Figure 5 The water circuit board 10 also includes an exhaust pipe 118, which connects to the heat tank 20 and is used to discharge steam from the heat tank 20. When the heat exchange medium is water, steam is generated after heating. When the steam reaches a certain level, the pressure inside the heat tank 20 increases, posing a potential danger. By providing the exhaust pipe 118 to discharge the steam from the heat tank 20, the safety of the heat tank 20 is improved. Specifically, the heat tank 20 is also provided with an exhaust port 25, and the exhaust pipe 118 connects to the exhaust port 25 so that the steam inside the heat tank 20 enters the exhaust pipe 118 through the exhaust port 25.

[0057] Please see Figure 1 and Figure 2The water supply device 100 also includes a housing 50, and the water circuit board 10, the hot tank 20, the heat exchanger 30 and the heater 40 are all located inside the housing 50. The water supply device 100 is generally rectangular.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A water supply device characterized by comprising: The water route board (10), the hot tank (20), the heat exchanger (30) and the heater (40); The water route board (10) is provided with an inlet water pipeline (111) and an outlet water pipeline (112), the inlet water pipeline (111) is used for connecting a water source and the heat exchanger (30), and the outlet water pipeline (112) is used for connecting a water end and the heater (40); The hot tank (20) is used for storing heat exchange medium and is connected with the heat exchanger (30); the heat exchanger (30) is used for simultaneously and separately flowing the heat exchange medium from the hot tank (20) and the drinking water from the inlet water pipeline (111) and makes the heat exchange medium and the drinking water in the heat exchanger (30) exchange heat; the heater (40) is arranged downstream of the heat exchanger (30) and is used for heating the flowing drinking water and transmitting the heated drinking water to the outlet water pipeline (112).

2. The water supply apparatus according to claim 1, wherein The water route board (10) further comprises a water guide branch (113), the water guide branch (113) connects the outlet water pipeline (112) and the hot tank (20), so that the drinking water heated by the heater (40) can flow into the hot tank (20); wherein the heat exchange medium is water.

3. The water supply apparatus according to claim 2, wherein The water route board (10) further comprises a waste water pipeline (114) and a first pump body (121), the waste water pipeline (114) connects the hot tank (20) and is used for discharging waste water in the hot tank (20); The first pump body (121) is connected to the waste water pipeline (114) and provides power for the water flow in the waste water pipeline (114).

4. The water supply apparatus according to claim 3, wherein The water route board (10) further comprises a back suction pipeline (115) and a three-way valve (127); The back suction pipeline (115) is used for connecting the water end and the waste water pipeline (114), and the three-way valve (127) is used for controlling the waste water pipeline (114) to be connected with the hot tank (20) or the waste water pipeline (114) to be connected with the back suction pipeline (115).

5. The water supply apparatus according to claim 2, wherein The water route board (10) further comprises a first valve body (123) and a second valve body (124); The first valve body (123) is arranged in the outlet water pipeline (112) and is used for controlling the connection or disconnection of the outlet water pipeline (112) and the water end; the second valve body (124) is arranged between the outlet water pipeline (112) and the water guide branch (113) and is used for controlling the connection or disconnection of the outlet water pipeline (112) and the water guide branch (113).

6. The water supply apparatus according to claim 1, wherein The water route board (10) further comprises a medium output pipeline (116) and a medium backflow pipeline (117); The medium output pipeline (116) connects the hot tank (20) and the heat exchanger (30) and is used for conveying the heat exchange medium in the hot tank (20) to the heat exchanger (30); the medium backflow pipeline (117) connects the heat exchanger (30) and the hot tank (20) and is used for flowing the heat exchange medium in the heat exchanger (30) back to the hot tank (20).

7. The water supply apparatus according to claim 6, wherein The water route board (10) further comprises a second pump body (122); The second pump body (122) is connected to the medium output pipeline (116) and is used for providing power for the flow of the heat exchange medium in the medium output pipeline (116).

8. The water supply apparatus according to claim 6, wherein The heat exchanger (30) is provided with a medium flow channel and a drinking water flow channel which are isolated from each other; One end of the medium flow channel is connected to the medium output pipeline (116), and the other end of the medium flow channel is connected to the medium return pipeline (117); one end of the drinking water flow channel is connected to the water inlet pipeline (111), and the other end of the drinking water flow channel is connected to the heater (40); the flow direction of the heat exchange medium in the medium flow channel is opposite to the flow direction of the drinking water in the drinking water flow channel.

9. The water supply apparatus according to any one of claims 1 to 8, wherein The water inlet pipeline (111) also communicates with the water outlet pipeline (112); The water circuit board (10) further comprises a third valve body (125) and a fourth valve body (126); the third valve body (125) is arranged between the water inlet pipeline (111) and the heat exchanger (30) and is used for controlling the communication or disconnection of the water inlet pipeline (111) and the heat exchanger (30); the fourth valve body (126) is arranged between the water inlet pipeline (111) and the water outlet pipeline (112) and is used for controlling the communication or disconnection of the water inlet pipeline (111) and the water outlet pipeline (112).

10. The water supply apparatus according to any one of claims 1 to 8, wherein The water circuit board (10) further comprises an exhaust pipeline (118) which communicates with the hot tank (20) and is used for exhausting steam in the hot tank (20).

Images