Water drinking equipment

Abstract

The utility model belongs to the technical field of drinking water preparation, and discloses drinking water equipment. The water drinking equipment comprises a water storage part, a water outlet structure, a heat exchanger and a backflow flow channel, the water storage part is used for storing water and heating water, the water storage part comprises a water inlet and a water outlet, and the water outlet structure can be communicated with the water outlet to form a water outlet flow channel; the heat exchanger comprises a first flow channel and a second flow channel which are matched with each other for heat exchange, the head end of the first flow channel is used for introducing purified water, the tail end of the first flow channel is communicated with the water inlet, the head end of the second flow channel is communicated with the water outlet, and the tail end of the second flow channel can be communicated with the water outlet flow channel; the head end of the backflow flow channel can communicate with the water outlet flow channel, and the tail end of the backflow flow channel communicates with the water storage piece or the first flow channel. According to the drinking equipment, the internal flow channel can be flushed through boiled water, so that the sterilization and disinfection effects are achieved, and drinking hygiene is guaranteed.

Description

Technical Field

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

[0002] As users' demand for drinking water increases, existing water dispensers, in addition to providing boiled water and room temperature water, have added the function of preparing cooled boiled water to meet users' drinking needs.

[0003] In existing water dispensers, boiling water exchanges heat with room temperature water in a heat exchanger to lower the temperature of the boiling water and thus produce cooled boiled water. Although this can provide cooled boiled water, there are shortcomings in terms of the hygiene of the water. Utility Model Content

[0004] The purpose of this invention is to provide a drinking water device that can provide cooled boiled water while ensuring drinking hygiene.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A drinking water device, comprising:

[0007] A water storage device, which is used to store and heat water, includes an inlet and an outlet.

[0008] A water outlet structure, which can be connected to the water outlet to form a water flow channel;

[0009] A heat exchanger includes a first flow channel and a second flow channel that are configured for heat exchange. The first flow channel is used to introduce purified water at its beginning and is connected to the inlet. The second flow channel is connected to the outlet at its beginning and is connected to the outlet flow channel at its end.

[0010] The return flow channel has its first end connected to the outlet flow channel and its end connected to the water storage device or the first flow channel.

[0011] As an optional solution for the aforementioned drinking water equipment, the water storage component includes:

[0012] A heating element, wherein a water storage chamber is provided inside the heating element;

[0013] A heating component is disposed in the heating tank and is used to heat the water in the water storage chamber.

[0014] As an optional solution for the above-mentioned drinking water equipment, a three-way valve is provided on the water outlet channel, which can selectively connect the water outlet channel to the water outlet structure or the return channel.

[0015] Alternatively, the first end of the return flow channel is connected to the outlet flow channel, a first switch valve is provided on the return flow channel, and a second switch valve is provided on the outlet flow channel downstream of the first end of the return flow channel.

[0016] As an optional solution for the aforementioned drinking water equipment, the water storage component is connected to an exhaust channel.

[0017] As an alternative to the aforementioned drinking water equipment, the water outlet is connected to a first water pump, which is used to pump water to the water outlet channel and the second channel.

[0018] As an optional solution for the above-mentioned drinking water equipment, the drinking water equipment further includes a mixing regulating valve, which is disposed in the water outlet channel and located upstream of the first end of the return channel;

[0019] The mixing regulating valve includes a first valve inlet, a second valve inlet, and a valve outlet. The first valve inlet is connected to the water outlet, the second valve inlet is connected to the end of the second flow channel, and the valve outlet is connected to the water outlet structure. The opening degree of the first valve inlet and the second valve inlet is adjustable.

[0020] As an alternative to the aforementioned drinking water equipment, a first temperature sensor is provided on the water outlet channel downstream of the mixing regulating valve, and the first temperature sensor is communicatively connected to the mixing regulating valve.

[0021] As an alternative to the above-mentioned drinking water equipment, the drinking water equipment further includes a filtration mechanism, the outlet of which is connected to the inlet of the first flow channel to form a water inlet flow channel.

[0022] As an optional solution for the above-mentioned drinking water equipment, a pressure reducing valve and a second water pump are sequentially arranged along the water flow direction on the water inlet channel;

[0023] And / or, the drinking water device further includes a room temperature water channel, the first end of which can be connected to the outlet of the filter mechanism, and the last end of which is connected to the water outlet structure.

[0024] As an alternative to the aforementioned drinking water equipment, the drinking water equipment further includes an overflow channel, the first end of which can be connected to the end of the first channel.

[0025] The beneficial effects of this utility model are:

[0026] In the drinking water device provided by this utility model, the heated boiling water that enters the water storage device through the first flow channel can flow back to the water storage device in sequence through the second flow channel, the outlet flow channel and the return flow channel, so as to sterilize the components that pass through by the boiling water. This cycle ensures the hygiene of the drinking water device and improves drinking safety. Attached Figure Description

[0027] Figure 1 This is a first schematic diagram of the first type of drinking water device provided by this utility model;

[0028] Figure 2 This is a second schematic diagram of the first drinking water device provided by this utility model;

[0029] Figure 3 This is a schematic diagram of the second type of drinking water device provided by this utility model.

[0030] In the picture:

[0031] 10. Filtration mechanism; 20. Heat exchanger; 21. First flow channel; 22. Second flow channel; 30. Water storage component; 31. Heating tank; 32. Heating assembly; 40. Water outlet structure; 51. First water pump; 52. Second water pump; 61. Three-way valve; 62. Mixing regulating valve; 63. Pressure reducing valve; 64. Fourth switching valve; 65. Third switching valve; 70. First temperature sensor; 110. Inlet flow channel; 120. Outlet flow channel; 130. Return flow channel; 140. Normal temperature water flow channel; 150. Exhaust flow channel. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figure 1 As shown, this embodiment provides a drinking water device, including a water storage component 30 and a water outlet structure 40. The water storage component 30 is used to store and heat the water inside. The water storage component 30 includes an inlet and an outlet. The purified water inlet is used to introduce filtered purified water. The outlet can communicate with the water outlet structure 40 to form a water outlet channel 120. The purified water is heated into hot water in the water storage component 30, and the heated hot water can enter the water outlet structure 40 for the user to use.

[0037] To achieve heating and water storage functions, the water storage component 30 includes a heating element 31 and a heating element 32 disposed within the heating element 31. The heating element 31 has a water storage cavity, with both an inlet and an outlet connected to it. The heating element 32 is used to heat the water in the water storage cavity. Optionally, the heating element 32 can be a heating wire or other structure capable of heating the water in the water storage cavity. The heating element 32 is a prior art structure and will not be described in detail here.

[0038] To provide users with cooled boiled water, the drinking water equipment also includes a heat exchanger 20. The heat exchanger 20 includes a first flow channel 21 and a second flow channel 22 that cooperate in heat exchange. The first end of the first flow channel 21 is used to introduce purified water, and the end of the first flow channel 21 is connected to the heating element 31 of the water storage unit 30. The first end of the second flow channel 22 can be connected to the water outlet, and the end of the second flow channel 22 is connected to the water outlet flow channel 120. By setting up the heat exchanger 20, purified water first enters the first flow channel 21 in the heat exchanger 20. The purified water in the first flow channel 21 can absorb heat, and the warm water with increased temperature enters the water storage unit 30 for heating, which helps to improve heating efficiency. At least part of the hot water heated by the water storage unit 30 can enter the second flow channel 22, and its temperature is reduced by exchanging heat with the purified water in the first flow channel 21, thus forming cooled boiled water. The cooled boiled water enters the water outlet flow channel 120 through the end of the second flow channel 22, and then enters the water outlet structure 40 through the water outlet flow channel 120 for users to take.

[0039] In this drinking water equipment, the heat exchanger 20 exchanges heat between room temperature purified water and heated boiled water. On the one hand, it increases the temperature of the purified water entering the water storage container 30, improves the heating efficiency of this part of the purified water, and avoids heat waste. On the other hand, it cools the heated boiled water through heat exchange to produce cooled boiled water, which speeds up the cooling of hot water and increases the output speed of cooled boiled water.

[0040] To ensure drinking water hygiene, the water supply equipment also includes a return flow channel 130. The first end of the return flow channel 130 connects to the outlet flow channel 120, and the second end connects to the heating element 31. During sterilization of the water supply equipment, such as... Figure 2 As shown, after being heated, the boiling water in the water storage unit 30 flows through the second flow channel 22, the outlet flow channel 120 and the return flow channel 130 in sequence, and then flows back into the water storage unit 30. The boiling water sterilizes the components it passes through. This cycle ensures the hygiene of the drinking water equipment and improves drinking safety.

[0041] In this embodiment, sterilization is performed using boiling water, eliminating the need for an additional sterilization module, which simplifies the structure and reduces costs.

[0042] In other embodiments, the connection position at the end of the return channel 130 can be adjusted according to actual needs. For example, it can be connected to the first channel 21, or it can be set between the first channel 21 and the water storage device 30. It can also realize the sterilization of boiling water circulation and can disinfect and sterilize the channel upstream of the water storage device 30.

[0043] like Figure 1 and Figure 2As shown, in some embodiments, a three-way valve 61 is provided on the water outlet channel 120. The three-way valve 61 can selectively connect the water outlet channel 120 to the water outlet structure 40 or the return channel 130. When sterilization of the drinking water equipment is required, the three-way valve 61 connects the water outlet channel 120 to the return channel 130. At this time, the water outlet channel 120 is not connected to the water outlet structure 40, and the water in the water outlet channel 120 enters the return channel 130 to achieve circulating sterilization of boiling water. When the user needs to take water, the water outlet channel 120 is connected to the water outlet structure 40. At this time, the water outlet channel 120 is not connected to the return channel 130 to ensure that the water in the water outlet channel 120 flows to the water outlet structure 40.

[0044] Specifically, the three-way valve 61 includes a first valve port, a second valve port, and a third valve port. The first valve port is connected to the water outlet channel 120, the second valve port is connected to the return channel 130, and the third valve port is connected to the water outlet structure 40. The first valve port in the three-way valve 61 can switch between being connected to the second valve port and being connected to the third valve port.

[0045] Optionally, the three-way valve 61 can be a solenoid valve to facilitate automatic switching of the connection state.

[0046] In some embodiments, the three-way valve 61 can be replaced by two switching valves. For example, the first end of the return flow channel 130 is connected to the outlet flow channel 120, and a first switching valve is provided on the return flow channel 130 to control the opening and closing of the return flow channel 130; a second switching valve is provided on the outlet flow channel 120 downstream of the first end of the return flow channel 130 to control the opening and closing of the outlet flow channel 120 and the outlet structure 40.

[0047] To meet users' temperature requirements for water intake, a mixing regulating valve 62 is installed on the water outlet channel 120. The mixing regulating valve 62 includes a first valve inlet, a second valve inlet, and a valve outlet. The first valve inlet connects to the water outlet, the second valve inlet connects to the end of the second channel 22, and the valve outlet connects to the water outlet structure 40. The opening degrees of the first and second valve inlets are adjustable. By installing the mixing regulating valve 62, the flow rate of hot water flowing from the water outlet into the mixing regulating valve 62 can be adjusted, thereby regulating the flow rate of cooled boiled water entering the mixing regulating valve 62 from the second channel 22. By adjusting the ratio of the mixed hot water and cooled boiled water, the water temperature entering the water outlet structure 40 can be controlled, thus meeting users' needs for cooled boiled water at different temperatures.

[0048] Understandably, the opening degrees of the first and second valve inlets are inversely proportional; when the opening degree of the first valve inlet increases, the opening degree of the second valve inlet decreases accordingly. When the opening degree of the first valve inlet increases, the proportion of hot water flowing out of the outlet that directly enters the first valve inlet increases, while the proportion of hot water diverted to the second flow channel 22 decreases. This reduces the flow rate of cooled boiled water passing through the second flow channel 22, thus reducing the flow rate of cooled boiled water entering the second valve inlet. At this time, due to the large proportion of hot water and the small proportion of cooled boiled water, the temperature of the mixed cooled boiled water is relatively high. Conversely, when the opening degree of the first valve inlet decreases, the proportion of hot water flowing out of the outlet that directly enters the first valve inlet decreases, while the proportion of hot water diverted to the second flow channel 22 increases. This increases the flow rate of cooled boiled water passing through the second flow channel 22, thus increasing the flow rate of cooled boiled water entering the second valve inlet. At this time, due to the small proportion of hot water and the large proportion of cooled boiled water, the temperature of the mixed cooled boiled water is relatively low.

[0049] It should be noted that the mixing control valve 62 is an existing structure in the art. The structure and control principle of the mixing control valve 62 can adopt any structure and principle in the prior art, which will not be elaborated here.

[0050] To meet the user's need for hot water, when the user needs hot water, the mixing regulating valve 62 adjusts the opening of the first valve inlet to the maximum, and correspondingly, the second valve inlet closes, so that all the hot water flowing out of the outlet passes through the first valve inlet, flows through the outlet channel 120 to the outlet structure 40, and realizes the supply of hot water.

[0051] In other embodiments, the drinking water device may include a hot water channel that connects the water outlet and the water outlet structure 40, thereby separating the water outlet paths of cooled boiled water and hot water. Hot water is supplied to the water outlet structure 40 through the hot water channel, and cooled boiled water is supplied to the water outlet structure 40 through the water outlet channel 120.

[0052] like Figure 1 As shown, the mixing regulating valve 62 is located on the outlet channel 120 and downstream of the first end of the second channel 22, and upstream of the three-way valve 61. When the opening of the first valve inlet is increased, the flow rate of the hot water diverted from the outlet channel 120 to the first end of the second channel 22 decreases accordingly, and the flow rate in the second channel 22 decreases to correspond with the opening of the second valve inlet.

[0053] To accurately control the outlet water temperature, in some embodiments, a first temperature sensor 70 is installed on the outlet flow channel 120 downstream of the mixing regulating valve 62. The first temperature sensor 70 is communicatively connected to the mixing regulating valve 62. The first temperature sensor 70 can detect the temperature of the mixed water flowing out of the valve outlet. By comparing the detected water temperature with the target temperature set by the user, it can provide feedback to adjust the opening degree of the first valve inlet and the second valve inlet in the mixing regulating valve 62, thereby adjusting the mixing ratio of boiling water and cooled boiled water, and thus accurately controlling the outlet water temperature.

[0054] Optionally, the drinking water equipment includes a controller, a mixing regulating valve 62 and a first temperature sensor 70, all of which are electrically connected to the controller. The temperature information detected by the first temperature sensor 70 is transmitted to the controller, and the controller adjusts the opening degree of the mixing regulating valve 62 according to the received temperature information to accurately control the outlet water temperature.

[0055] Optionally, the controller can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control the opening of the mixing regulating valve 62 based on the detected temperature.

[0056] It is worth noting that the connection relationship, specific structure, and specific control method of the controller with other components are all conventional methods in the field. This utility model can adopt any of the connection relationship, specific structure, and specific control method of the controller with other components in the prior art. This utility model will not provide a detailed description of the connection relationship, specific structure, and specific control method of the controller with other components.

[0057] In some embodiments, the mixing control valve 62 and the three-way valve 61 can be replaced by a four-way valve, which can also achieve the above functions.

[0058] To ensure that the hot water flowing from the outlet is boiling water, in some embodiments, a second temperature sensor is installed between the end of the first flow channel 21 and the inlet. This second temperature sensor is communicatively connected to the heating element 32. The second temperature sensor can detect the temperature of the purified water flowing out of the first flow channel 21 and adjust the power of the heating element 32 based on the detected temperature feedback to ensure that the water heated by the heating element 32 is boiling water. This temperature feedback regulation system, consisting of the second temperature sensor and the heating element 32, not only ensures the heated water temperature but also allows for reasonable adjustment of the heating element 32's power, avoiding energy waste.

[0059] Optionally, both the heating element 32 and the second temperature sensor are electrically connected to the controller. The temperature information detected by the second temperature sensor is transmitted to the controller. The controller adjusts the power of the heating element 32 according to the received temperature information, such as adjusting the duty cycle of the heating element 32, to precisely control the water temperature after heating.

[0060] In some embodiments, the outlet is connected to a first water pump 51, which drives the water flow to provide power for the water, allowing the boiling water flowing out of the outlet to be divided under a certain pressure and enter the outlet channel 120 and the second channel 22 respectively. Optionally, the outlet end of the first water pump 51 can be connected to the second channel 22 and the outlet channel 120 respectively through a T-connector.

[0061] To prevent a sudden increase in pressure inside the heating element 31, the heating element 31 is connected to an exhaust channel 150. The exhaust channel 150 is used to discharge steam from the heating element 31 to avoid excessive steam pressure inside the heating element 31 and potential safety hazards.

[0062] In some embodiments, such as Figure 3 As shown, the first water pump 51 can be omitted from the water outlet to reduce costs. The boiling water flowing out of the outlet is released under pressure within the heating element 31. To prevent boiling water from being discharged through the vent channel 150, a third switch valve 65 needs to be installed on the vent channel 150 to control the opening and closing of the vent channel 150.

[0063] like Figures 1-3 As shown, in some embodiments, the drinking water device further includes a filtration mechanism 10 for filtering the incoming water. The outlet of the filtration mechanism 10 is connected to the beginning of the first flow channel 21 to form an inlet flow channel 110, and the end of the return flow channel 130 is connected to the inlet flow channel 110.

[0064] In some embodiments, the filtration mechanism 10 includes at least one filter element, which can achieve at least one stage of filtration to ensure the filtration effect on water and improve drinking water safety. The filtration mechanism 10 and the filter element are existing structures in the art and will not be described in detail here.

[0065] To improve the water flow dynamics during water sterilization, a second water pump 52 is also installed on the water inlet channel 110. The second water pump 52 can drive the water flow to ensure that the purified water can flow through the water inlet channel 110 to the first channel 21 to prepare boiled water or cooled boiled water.

[0066] To facilitate the control of water injection into the first flow channel 21, a pressure reducing valve 63 is also installed on the inlet flow channel 110, located upstream of the second water pump 52. The pressure reducing valve 63, also known as a zero-pressure valve, opens when a low pressure is generated downstream. The lower the low pressure, the greater the flow rate. In other words, when the second water pump 52 starts, it generates negative pressure in the inlet flow channel 110, causing the pressure reducing valve 63 to open, allowing the filter mechanism 10 to supply water to the inlet flow channel 110. When the second water pump 52 shuts off, the water in the inlet flow channel 110 stops flowing, the negative pressure is eliminated, and the pressure reducing valve 63 closes. By coordinating the pressure reducing valve 63 with the second water pump 52, the valve automatically opens and closes according to the start and stop of the second water pump 52, eliminating the need for additional control of the valve 63, thus simplifying the control procedure and reducing costs.

[0067] To provide room temperature water, the outlet of the filter mechanism 10 is also connected to a room temperature water channel 140, which is connected to the water outlet structure 40 to provide room temperature water to users.

[0068] Optionally, a fourth switch valve 64 is provided on the ambient temperature water flow channel 140. The fourth switch valve 64 can control the opening and closing of the ambient temperature water flow channel 140, thereby controlling the ambient temperature water supply according to user needs.

[0069] It should be noted that the inlet channel 110, outlet channel 120, ambient temperature water channel 140 and return channel 130 can be formed by pipes or other structures, as long as the above-mentioned interconnection state can be achieved, there are no restrictions here.

[0070] In some embodiments, the drinking water device further includes an overflow channel, with the end of the first channel 21 connected to both the overflow channel and the water storage device 30. By setting the overflow channel, when preparing cooled boiled water, a portion of the purified water passing through the first channel 21 can be discharged through the overflow channel as needed, instead of flowing into the water storage device 30. On the one hand, this reduces the water flow rate into the water storage device 30, ensuring that the water storage device 30 can heat the water to boiling, avoiding excessive water flow that would result in excessively low water temperature after heating. On the other hand, in summer, the temperature of the purified water flowing into the first channel 21 is high. If the first channel 21 and the second channel 22 in the heat exchanger 20 maintain the same flow rate, the cooled boiled water prepared through the second channel 22 will be too hot, failing to meet user needs. To solve this problem, the flow rate into the first channel 21 can be increased, and the excess water can be discharged through the overflow channel.

[0071] Optionally, the drinking water equipment also includes an overflow regulating valve, which is connected to the end of the first flow channel 21, the inlet of the water storage component 30 and the overflow channel respectively. The overflow regulating valve can divert the water passing through the end of the first flow channel 21 and control the distribution ratio of water entering the overflow channel and the water storage component 30 to meet the demand.

[0072] It should be noted that the regulating principle of the overflow regulating valve is the same as that of the mixing regulating valve 62, and will not be repeated here.

[0073] In some embodiments, to drain the water used during the sterilization process and prevent users from drinking it, the drinking water device also includes a drain channel that is connected to the heating tank 31. After sterilization is complete, the drain channel opens, and the boiling water used to rinse the channel enters the drain channel through the heating tank 31 and is then discharged through the drain channel to prevent users from drinking this portion of the boiling water. A fifth switch valve is provided on the drain channel to control its opening and closing.

[0074] In other embodiments, the first end of the drainage channel can be directly connected to the outlet channel 120, which can also achieve the above function.

[0075] In some embodiments, the second water pump 52 and pressure reducing valve 63 may not be provided on the water inlet channel 110. Instead, a sixth switching valve and a flow regulating valve may be used instead. The sixth switching valve is used to control the opening and closing of the water inlet channel 110, and the flow regulating valve is used to control the flow rate in the water inlet channel 110 so that the flow rate of the clean water entering the first channel 21 meets the usage requirements.

[0076] Optionally, a flow meter is also provided on the inlet channel 110. The flow meter is used to detect the flow rate in the inlet channel 110. The flow meter is connected in communication with the flow regulating valve to adjust the opening of the flow regulating valve according to the detected flow rate value, so as to accurately control the flow rate in the inlet channel 110.

[0077] Optionally, the flow meter can be connected to the flow regulating valve via a controller. The flow meter sends the detected flow information to the controller, and the controller controls the opening of the flow regulating valve according to the received flow information to accurately control the flow in the inlet channel 110.

[0078] It should be noted that the connection relationship and specific structure of the flow meter with other components are conventional methods in the field. This utility model can adopt any connection relationship and specific structure of the flow meter with other components in the prior art. This utility model will not provide a detailed description of the connection relationship and specific structure of the flow meter with other components.

[0079] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A drinking water device, characterized in that, include: A water storage device (30) is used to store water and heat water. The water storage device (30) includes an inlet and an outlet. Water outlet structure (40), which can be connected to the water outlet to form a water outlet channel (120); The heat exchanger (20) includes a first flow channel (21) and a second flow channel (22) that are heat exchanged together. The first end of the first flow channel (21) is used to introduce clean water, and the end of the first flow channel (21) is connected to the water inlet. The first end of the second flow channel (22) is connected to the water outlet, and the end of the second flow channel (22) can be connected to the water outlet flow channel (120). The return channel (130) is connected at its head to the outlet channel (120), and at its end to the water storage device (30) or the first channel (21).

2. The drinking water equipment according to claim 1, characterized in that, The water storage component (30) includes: A heating element (31) is provided with a water storage chamber inside the heating element (31); Heating component (32) is disposed on the heating tank (31) and is used to heat the water in the water storage chamber.

3. The drinking water equipment according to claim 1, characterized in that, A three-way valve (61) is provided on the water outlet channel (120), and the three-way valve (61) can selectively connect the water outlet channel (120) to the water outlet structure (40) or the return channel (130); Alternatively, the first end of the return channel (130) is connected to the outlet channel (120), a first switch valve is provided on the return channel (130), and a second switch valve is provided on the outlet channel (120) downstream of the first end of the return channel (130).

4. The drinking water equipment according to claim 1, characterized in that, The water storage component (30) is connected to an exhaust channel (150).

5. The drinking water equipment according to claim 1, characterized in that, The outlet is connected to a first water pump (51), which is used to pump water to the outlet channel (120) and the second channel (22).

6. The drinking water equipment according to any one of claims 1-5, characterized in that, The drinking water equipment also includes a mixing regulating valve (62), which is disposed in the water outlet channel (120) and located upstream of the first end of the return channel (130); The mixing regulating valve (62) includes a first valve inlet, a second valve inlet, and a valve outlet. The first valve inlet is connected to the water outlet, the second valve inlet is connected to the end of the second flow channel (22), and the valve outlet is connected to the water outlet structure (40). The opening degree of the first valve inlet and the second valve inlet is adjustable.

7. The drinking water equipment according to claim 6, characterized in that, A first temperature sensor (70) is provided on the water outlet channel (120) downstream of the mixing regulating valve (62), and the first temperature sensor (70) is communicatively connected to the mixing regulating valve (62).

8. The drinking water equipment according to any one of claims 1-4, characterized in that, The drinking water equipment also includes a filtration mechanism (10), the outlet of which is connected to the inlet of the first flow channel (21) to form a water inlet flow channel (110).

9. The drinking water equipment according to claim 8, characterized in that, A pressure reducing valve (63) and a second water pump (52) are sequentially arranged along the water flow direction on the water inlet channel (110); And / or, the drinking water device further includes a room temperature water channel (140), the first end of which can be connected to the outlet of the filter mechanism (10), and the end of which is connected to the water outlet structure (40).

10. The drinking water equipment according to any one of claims 1-4, characterized in that, The drinking water equipment also includes an overflow channel, the first end of which can be connected to the end of the first channel (21).

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