Water heater system capable of heating drinking water

Abstract

The utility model provides a water heater system capable of heating drinking water, which comprises a first heat exchange component, a second heat exchange component and a water supply component, the first heat exchange component comprises a heat exchanger, a water inlet pipeline and a water outlet pipeline, one end of the water inlet pipeline is a first water inlet, one end of the water outlet pipeline is a first water outlet, and a circulating water pump is arranged on the water inlet pipeline; the second heat exchange assembly comprises an inner circulation pipeline and a second pipeline, a second water inlet and a second water outlet are formed in the two ends of the second pipeline respectively, an inlet of the inner circulation pipeline communicates with the water outlet pipeline through a valve, and an outlet of the inner circulation pipeline communicates with the water inlet pipeline; the two ends of the outer circulation pipeline are connected with the first water inlet and the first water outlet respectively, the outer circulation pipeline is communicated with the hot water connector of the water using end, and the external tap water pipeline is communicated with the first water inlet and the cold water connector of the water using end respectively. The second heat exchange assembly is arranged in the water heater system, so that the water heater system has the function of heating drinking water.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water heater system of drinkable water can be heated. BACKGROUND

[0002] The prior art gas water heater uses gas as energy, and the water is heated by the heat generated by gas combustion, so that the water temperature reaches the requirements of life, heating and the like. Its working principle is: when the user uses hot water, the water heater carries out general constant temperature heating combustion; when the user is not in the process of using hot water, the water heater detects that the water temperature in the pipeline is lower than the set temperature, and then starts the circulating water pump in the water heater, and the water pump runs to make the water in the pipeline flow into the water heater for heating, and after the water in the pipeline is heated to the specified temperature, the water pump stops running, and the water heater also stops working. In this way, when the user opens the hot water faucet, hot water can come out immediately. The zero cold water function of the first water out (the circulating preheating function of the bathroom water) is realized.

[0003] The prior art gas water heater cannot heat drinkable water, whether the water heater is without a water pump or with a water pump. The main reason is that the pipeline of the ordinary water heater is easy to pollute the water quality, and the internal pipeline is difficult to clean or replace after long-term use, which also makes the water quality worse. Therefore, the general gas water heater can only provide life water for the user, and cannot provide drinkable water heating for the user.

[0004] However, the gas water heater has the advantages of fast speed and convenience because the load is much larger than that of general household appliances. Therefore, how to realize that the water heater can have the function of heating drinkable water is a technical problem to be solved in the technical field. INVENTION CONTENTS

[0005] The utility model wants to solve the technical problem in the prior art, and provides a water heater system of drinkable water can be heated.

[0006] The utility model solves the above technical problem by the following technical scheme:

[0007] A water heater system of drinkable water can be heated, and the system has the characteristics that the system comprises:

[0008] The first heat exchange assembly comprises a heat exchanger, and water inlet pipeline and water outlet pipeline connected to the inlet and outlet of the heat exchanger respectively, one end of the water inlet pipeline far away from the heat exchanger is a first water inlet, one end of the water outlet pipeline far away from the heat exchanger is a first water outlet, life water flows into the heat exchanger after being heated through the first water inlet, and then flows out from the first water outlet, and a circulating water pump is arranged on the water inlet pipeline;

[0009] The second heat exchange assembly comprises an inner circulation pipeline and a second pipeline in heat exchange with the inner circulation pipeline, two ends of the second pipeline being a second water inlet and a second water outlet respectively, drinking water flowing into the second pipeline through the second water inlet and then flowing out from the second water outlet after heat exchange with the inner circulation pipeline, an inlet of the inner circulation pipeline being communicated with the water outlet pipeline through a valve, and an outlet of the inner circulation pipeline being communicated with the water inlet pipeline;

[0010] The outer circulation pipeline, an external tap water pipeline and a water use end, two ends of the outer circulation pipeline being connected with the first water inlet and the first water outlet respectively, the outer circulation pipeline being communicated with a hot water interface of the water use end, and the external tap water pipeline being communicated with the first water inlet and a cold water interface of the water use end respectively.

[0011] In the technical solution, the second heat exchange assembly is arranged, so that the drinking water can be heated without affecting the original function of the water heater of heating the domestic water, and the water heater system has the function of heating the drinking water.

[0012] Preferably, the water heater system further comprises:

[0013] A first temperature sensor is arranged on the water outlet pipeline and close to the first water outlet, and the first temperature sensor is used for detecting the temperature of the domestic water after heat exchange;

[0014] A second temperature sensor is arranged on the second pipeline and close to the second water outlet, and the second temperature sensor is used for detecting the temperature of the drinking water after heat exchange.

[0015] In the technical solution, the first temperature sensor is arranged to detect the temperature of the domestic water after heat exchange, so as to monitor the temperature of the domestic water of the first water outlet. The second temperature sensor is arranged to detect the temperature of the drinking water after heat exchange, so as to monitor the temperature of the drinking water of the second water outlet.

[0016] Preferably, the water heater system further comprises:

[0017] A third temperature sensor is arranged on the water inlet pipeline and close to the first water inlet, and the third temperature sensor is used for detecting the temperature of the domestic water before heat exchange;

[0018] A fourth temperature sensor is arranged on the second pipeline and close to the second water inlet, and the fourth temperature sensor is used for detecting the temperature of the drinking water before heat exchange.

[0019] In the technical solution, the third temperature sensor is arranged to detect the temperature of the domestic water before heat exchange, so as to monitor the temperature of the domestic water at the first water inlet.

[0020] Preferably, the second pipeline is provided with a first flow sensor, and the first flow sensor is arranged close to the second water inlet.

[0021] In the technical solution, the first flow sensor is arranged to detect the flow of the drinking water flowing through the second water inlet.

[0022] Preferably, the water inlet pipeline comprises a first water inlet pipe and a second water inlet pipe connected in sequence, and the first water inlet, the first water inlet pipe, the second water inlet pipe and the inlet of the heat exchanger are communicated in sequence.

[0023] The water heater system further comprises a three-way joint, the three-way joint is provided with a first interface, a second interface and a third interface, the first interface is communicated with the first water inlet through the first water inlet pipe, the second interface is communicated with the outlet of the inner circulation pipeline, the third interface is communicated with the inlet of the heat exchanger through the second water inlet pipe, and the circulating water pump is arranged on the second water inlet pipe.

[0024] In the technical solution, the three-way joint is arranged to provide a specific way for the inner circulation pipeline to communicate with the water inlet pipeline.

[0025] Preferably, the water heater system further comprises a one-way valve arranged on the first water inlet pipe; and / or,

[0026] The second water inlet pipe is provided with a second flow sensor, and the second flow sensor is arranged close to the three-way joint.

[0027] In the technical solution, the one-way valve is arranged to prevent the water flowing from the outlet of the inner circulation pipeline from flowing to the first water inlet, so as to ensure the single flow direction from the inner circulation pipeline to the second water inlet pipe. The second flow sensor arranged on the second water inlet pipe facilitates the detection of the inner circulation flow.

[0028] Preferably, the water heater system further comprises a pressure relief pipeline, an inlet of the pressure relief pipeline is arranged on the first water inlet pipe and upstream of the one-way valve, an outlet of the pressure relief pipeline is arranged on the second water inlet pipe, and a pressure relief valve is arranged on the pressure relief pipeline.

[0029] In the technical solution, the pressure relief pipeline and the pressure relief valve are arranged to relieve the pressure downstream of the one-way valve to the upstream of the one-way valve when the pressure downstream of the one-way valve is too high.

[0030] Preferably, the water outlet pipeline comprises a first water outlet pipe and a second water outlet pipe connected in sequence, the outlet of the heat exchanger, the first water outlet pipe, the second water outlet pipe and the first water outlet are communicated in sequence.

[0031] The valve is a three-way valve, which is provided with an inlet, a first outlet and a second outlet, the inlet is communicated with the first water outlet pipe, the first outlet is communicated with the inlet of the internal circulation pipeline, and the second outlet is communicated with the second water outlet through the second water outlet pipe; the inlet of the three-way valve is switched between the state of being communicated with the first outlet or the state of being communicated with the second outlet.

[0032] In the technical scheme, the first water outlet pipe can be switched between the state of being communicated with the internal circulation pipeline or the state of being communicated with the second water outlet pipe through the three-way valve.

[0033] Preferably, the first heat exchange assembly further comprises a burner for heating the heat exchanger.

[0034] In the technical scheme, the specific heat source setting mode is provided.

[0035] Preferably, the first heat exchange assembly further comprises an air inlet pipeline, one end of the air inlet pipeline is provided with a gas inlet, and the other end is communicated with the burner; and a gas proportional valve is arranged on the air inlet pipeline.

[0036] In the technical scheme, the gas proportional valve is arranged, so that the gas inlet can be distributed, thereby adjusting the heating intensity of the burner.

[0037] The positive progress effect of the utility model lies in:

[0038] The utility model discloses a second heat exchange assembly is arranged, and on the basis that not influencing the original water heater of domestic water heating, the heating of drinking water is realized, so that the water heater system has the function of heating drinking water. ACCOUT OF DRAWINGS

[0039] Figure 1 It is the structure diagram of the water heater system of a preferable embodiment of the utility model that can heat drinking water.

[0040] Figure 2 It is the structure diagram of the water heater system of a preferable embodiment of the utility model that can heat drinking water. Figure 1 It is the local enlarged view of part A.

[0041] Figure 3 It is the local enlarged view of part A. Figure 1 It is the local enlarged view of part B.

[0042] Figure 4The water flow direction schematic view of the water heater system in a living water heating mode according to a preferred embodiment of the present utility model.

[0043] Figure 5 The water flow direction schematic view of the water heater system in a drinking water heating mode according to a preferred embodiment of the present utility model.

[0044] Marked for explanation

[0045] Water heater system 1

[0046] First heat exchange assembly 10

[0047] Heat exchanger 11

[0048] Water inlet pipeline 12

[0049] First water inlet pipe 121

[0050] Second water inlet pipe 122

[0051] Water outlet pipeline 13

[0052] First water outlet pipe 131

[0053] Second water outlet pipe 132

[0054] First water inlet 14

[0055] First water outlet 15

[0056] Circulating water pump 16

[0057] Burner 17

[0058] Air inlet pipeline 18

[0059] Gas inlet 181

[0060] Gas proportional valve 19

[0061] Second heat exchange assembly 20

[0062] Internal circulation pipeline 21

[0063] Internal circulation pipeline inlet 211

[0064] Internal circulation pipeline outlet 212

[0065] Second pipeline 22

[0066] Second water inlet 23

[0067] Second water outlet 24

[0068] Drinking water faucet 25

[0069] Three-way valve 30

[0070] Inlet 31

[0071] First outlet 32

[0072] Second outlet 33

[0073] External circulation pipeline 41

[0074] External water supply pipeline 42

[0075] Water use end 43

[0076] First temperature sensor 51

[0077] Second temperature sensor 52

[0078] Third temperature sensor 53

[0079] Fourth temperature sensor 54

[0080] First flow sensor 61

[0081] Second flow sensor 62

[0082] Three-way joint 70

[0083] First interface 71

[0084] Second interface 72

[0085] Third interface 73

[0086] First one-way valve 81

[0087] Second one-way valve 82

[0088] Pressure relief pipeline 90

[0089] Pressure relief valve 91 DETAILED DESCRIPTION

[0090] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0091] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0093] like Figures 1 to 5 As shown, this embodiment provides a water heater system 1 that can heat drinking water, which includes: a first heat exchange component 10, a second heat exchange component 20, an external circulation pipe 41, an external tap water pipe 42, and a water supply terminal 43.

[0094] The first heat exchange assembly 10 includes a heat exchanger 11 and an inlet pipe 12 and an outlet pipe 13 connected to the inlet and outlet of the heat exchanger 11, respectively. The end of the inlet pipe 12 away from the heat exchanger 11 is the first inlet 14, and the end of the outlet pipe 13 away from the heat exchanger 11 is the first outlet 15. Domestic water flows into the heat exchanger 11 through the first inlet 14, is heated, and then flows out from the first outlet 15. A circulating water pump 16 is provided on the inlet pipe 12.

[0095] The second heat exchange component 20 includes an internal circulation pipe 21 and a second pipe 22 that exchanges heat with the internal circulation pipe 21. The two ends of the second pipe 22 are a second inlet 23 and a second outlet 24, respectively. Drinking water flows into the second pipe 22 through the second inlet 23 and exchanges heat with the internal circulation pipe 21, and then flows out from the second outlet 24. The inlet 211 of the internal circulation pipe is connected to the outlet pipe 13 through a valve, and the outlet 212 of the internal circulation pipe is connected to the inlet pipe 12.

[0096] The external circulation pipe 41, the external tap water pipe 42, and the water supply terminal 43 are connected to the first inlet 14 and the first outlet 15 at both ends, respectively. The external circulation pipe 41 is connected to the hot water interface of the water supply terminal 43, and the external tap water pipe 42 is connected to the first inlet 14 and the cold water interface of the water supply terminal 43.

[0097] Thus, by arranging the second heat exchange assembly 20, the heating of the drinking water is realized without affecting the original function of the water heater of heating the domestic water, so that the water heater system 1 has the function of heating the drinking water.

[0098] Preferably, the water heater system 1 further comprises a first temperature sensor 51 and a second temperature sensor 52. The first temperature sensor 51 is arranged on the water outlet pipeline 13 and close to the first water outlet 15, and is used for detecting the temperature of the domestic water after heat exchange. The second temperature sensor 52 is arranged on the second pipeline 22 and close to the second water outlet 24, and is used for detecting the temperature of the drinking water after heat exchange. Thus, by arranging the first temperature sensor 51, the temperature of the domestic water after heat exchange can be detected, so as to realize the monitoring of the temperature of the domestic water at the first water outlet 15. By arranging the second temperature sensor 52, the temperature of the drinking water after heat exchange can be detected, so as to realize the monitoring of the temperature of the drinking water at the second water outlet 24.

[0099] Further, the water heater system 1 further comprises a third temperature sensor 53 and a fourth temperature sensor 54. The third temperature sensor 53 is arranged on the water inlet pipeline 12 and close to the first water inlet 14, and is used for detecting the temperature of the domestic water before heat exchange. The fourth temperature sensor 54 is arranged on the second pipeline 22 and close to the second water inlet 23, and is used for detecting the temperature of the drinking water before heat exchange. Thus, by arranging the third temperature sensor 53, the temperature of the domestic water before heat exchange can be detected, so as to realize the monitoring of the temperature of the domestic water at the first water inlet 14. By arranging the fourth temperature sensor 54, the temperature of the drinking water before heat exchange can be detected, so as to realize the monitoring of the temperature of the drinking water at the second water inlet 23.

[0100] Preferably, the second pipeline 22 is provided with a first flow sensor 61, and the first flow sensor 61 is arranged close to the second water inlet 23. Thus, by arranging the first flow sensor 61, the water flow of the drinking water flowing through the second water inlet 23 can be detected.

[0101] Specifically, the water inlet pipeline 12 comprises a first water inlet pipeline 121 and a second water inlet pipeline 122 connected in sequence, and the first water inlet 14, the first water inlet pipeline 121, the second water inlet pipeline 122 and the inlet of the heat exchanger 11 are communicated in sequence.

[0102] The water heater system 1 further comprises a three-way joint 70, which is provided with a first interface 71, a second interface 72 and a third interface 73. The first interface 71 is communicated with the first water inlet 14 through the first water inlet pipe 121, the second interface 72 is communicated with the outlet 212 of the inner circulation pipe 21, and the third interface 73 is communicated with the inlet of the heat exchanger 11 through the second water inlet pipe 122, and the circulation water pump is arranged on the second water inlet pipe 122. In this way, by arranging the three-way joint 70, a specific mode that the inner circulation pipe 21 is communicated with the water inlet pipe 12 is provided.

[0103] Preferably, the water heater system 1 further comprises a one-way valve, which is referred to as a first one-way valve 81, and the first one-way valve 81 is arranged on the first water inlet pipe 121. In this way, by arranging the first one-way valve 81, the water flow from the outlet 212 of the inner circulation pipe 21 is prevented from flowing to the first water inlet 14, so as to ensure the single flow direction of the inner circulation pipe 21 to the second water inlet pipe 122.

[0104] The water heater system 1 further comprises a second one-way valve 82, which is arranged on the outer circulation pipe 41. In this way, by arranging the second one-way valve 82, the water flow from the outer circulation pipe 41 is prevented from entering the outer water inlet pipe 42, so as to ensure the single flow direction of the outer circulation pipe 41 to the first water inlet 14.

[0105] The second water inlet pipe 122 is provided with a second flow sensor 62, and the second flow sensor 62 is arranged close to the three-way joint 70. In this way, by arranging the second flow sensor 62 on the second water inlet pipe 122, the inner circulation flow can be conveniently detected.

[0106] Preferably, the water heater system 1 further comprises a pressure relief pipe 90, the inlet of the pressure relief pipe 90 is located on the first water inlet pipe 121 and is located upstream of the first one-way valve 81, the outlet of the pressure relief pipe 90 is located on the second water inlet pipe 122, and the pressure relief pipe 90 is provided with a pressure relief valve 91. In this way, by arranging the pressure relief pipe 90 and the pressure relief valve 91, when the pressure downstream of the one-way valve is too high, the pressure relief valve 91 can be used to relieve the pressure to the upstream of the one-way valve.

[0107] Preferably, the water outlet pipe 13 comprises a first water outlet pipe 131 and a second water outlet pipe 132 connected in sequence, and the outlet of the heat exchanger 11, the first water outlet pipe 131, the second water outlet pipe 132 and the first water outlet 15 are communicated in sequence.

[0108] The valve is a three-way valve 30, which is provided with an inlet 31, a first outlet 32 and a second outlet 33. The inlet 31 is communicated with the first water outlet pipe 131, the first outlet 32 is communicated with the inlet 211 of the inner circulation pipeline, and the second outlet 33 is communicated with the second water outlet 24 through the second water outlet pipe 132. The inlet 31 of the three-way valve 30 is switched between the two states of being communicated with the first outlet 32 or the second outlet 33. In this way, by arranging the three-way valve 30, the first water outlet pipe 131 can be switched between the two states of being communicated with the inner circulation pipeline 21 or the second water outlet pipe 132.

[0109] In the embodiment, the first heat exchange assembly 10 further comprises a burner 17 for heating the heat exchanger 11.

[0110] Further, the first heat exchange assembly 10 further comprises an air inlet pipeline 18, one end of which is provided with a gas inlet 181, and the other end of which is communicated with the burner 17. The air inlet pipeline 18 is provided with a gas proportional valve 19. In this way, by arranging the gas proportional valve 19, the gas inlet can be distributed, so as to adjust the heating intensity of the burner 17.

[0111] The inner circulation pipeline 21 is provided with a plate heat exchanger, and the second pipeline 22 is arranged in the plate heat exchanger. The second water outlet 24 is provided with a drinking water faucet 25.

[0112] In the embodiment, the domestic water sequentially passes through the second water inlet pipe 122, the heat exchanger 11, the first water outlet pipe 131, the three-way valve 30 and the inner circulation pipeline 21, and then returns to the second water inlet pipe 122, so as to form an inner circulation system. The domestic water sequentially passes through the first water inlet pipe 121, the second water inlet pipe 122, the heat exchanger 11, the first water outlet pipe 131, the three-way valve 30, the second water outlet pipe 132 and the outer circulation pipeline 41, and then returns to the first water inlet pipe 121, so as to form an outer circulation system. The inner circulation system and the outer circulation system are switched by the three-way valve 30.

[0113] The heat exchanger 11 heats the domestic water in the inner circulation system and the outer circulation system. Then, the domestic water in the inner circulation system and the drinking water in the second pipeline 22 both enter the plate heat exchanger, and water-water heat exchange is performed therebetween, so as to heat the drinking water, and even to boil water close to 100℃. The plate heat exchanger is made of stainless steel and has a detachable structure, so as to ensure water quality.

[0114] The hot water system 1 of the embodiment can heat drinking water, and includes two working modes: a domestic water heating mode and a drinking water heating mode. In the domestic water heating mode, the hot water system 1 provides the user end with heated domestic water (domestic water) with zero cold water supply through the external circulation system; in the drinking water heating mode, the hot water system 1 heats the second pipeline 22 through the internal circulation system to provide heated drinking water.

[0115] That is, when the domestic water heating mode, the inlet 31 of the three-way valve 30 is in communication with the second outlet 33, realizing the communication between the first water outlet pipe 131 and the second water outlet pipe 132, at this time, the three-way valve 30 communicates the external circulation system to provide the user end with heated domestic water with zero cold water supply. As shown in FIG. 4, wherein the single arrow represents the flow direction of the domestic water. Figure 4

[0116] When the drinking water heating mode, the inlet 31 of the three-way valve 30 is in communication with the first outlet 32, realizing the communication between the first water outlet pipe 131 and the internal circulation pipeline 21, at this time, the three-way valve 30 communicates the internal circulation system to heat the second pipeline 22 to provide heated drinking water. As shown in FIG. 5, wherein the single arrow represents the flow direction of the domestic water; the double arrow represents the flow direction of the drinking water. Figure 5

[0117] Specifically, the plate heat exchanger is connected to the second pipeline 22 and the internal circulation pipeline 21 in a quick connection manner, and the connection directions are the same. The plate heat exchanger can be arranged inside the water heater or outside the water heater. When the plate heat exchanger is arranged outside the water heater, it is easy for the user to disassemble; when the plate heat exchanger is arranged inside the water heater, it is convenient for the whole machine to be installed together.

[0118] The working principle of the hot water system 1 of the embodiment can heat drinking water: when the user opens the drinking water faucet 25, the drinking water flows into the plate heat exchanger through the second water inlet 23 and the second water path. After the first flow sensor 61 detects the water flow, the three-way valve 30 switches to the internal circulation system (drinking water heating mode) and opens. After the second flow sensor 62 detects the water flow, the burner 17 continuously performs internal circulation combustion according to a certain load. The heated internal circulation hot water flows through the plate heat exchanger, exchanges heat with the drinking water in the plate heat exchanger, quickly heats the drinking water, until the temperature of the heated drinking water (outlet water temperature) at the second water inlet 23 reaches the set drinking water temperature, and then the water heater maintains constant temperature combustion. Until the user closes the drinking water faucet 25, the burner 17 stops burning and stops working, and the three-way valve 30 is still in the state of communicating the internal circulation system. When domestic water is used, the three-way valve 30 switches to the external circulation system.

[0119] ​​If the user sets the drinking water temperature too high, the water temperature in the inner circulation system needs to be higher, so the inner circulation system water (inner circulation water) may vaporize, causing damage to the machine. Therefore, a one-way valve is arranged on the first water inlet pipe 121. Due to the first one-way valve 81, the inner circulation system will become a closed system, and when the inner circulation water is heated, the pressure in the inner circulation system will rise, causing the vaporization temperature of the water to also increase, thereby preventing the inner circulation water from vaporizing. However, in order to prevent the inner circulation water pressure from being too high and causing the plate heat exchanger or pipeline to rupture, a pressure relief pipeline 90 and a pressure relief valve 91 are provided, the inlet of the pressure relief pipeline 90 is located on the first water inlet pipe 121 and is located upstream of the first one-way valve 81; the outlet of the pressure relief pipeline 90 is located on the second water inlet pipe 122. When the pressure in the inner circulation system is too high after being heated, the pressure can be relieved to a low pressure upstream of the first one-way valve 81 through the pressure relief valve 91. This internal relief method does not cause the machine to leak, and does not cause the user to be scalded due to the high-temperature inner circulation water leaking out.

[0120] The hot water system 1 of the heated drinking water of the embodiment, by setting the second heat exchange assembly 20, on the basis of not affecting the original hot water system that can heat the domestic water, realizes the heating of the drinking water, so that the hot water system 1 has the function of heating the drinking water.

[0121] Further, the hot water system 1 of the embodiment has the following beneficial technical effects:

[0122] 1. The plate heat exchanger is used to heat the drinking water, so that the drinking water heating waterway system and the domestic water heating waterway system are separated, preventing the drinking water from being contaminated by the domestic water (bathroom water);

[0123] 2. The plate heat exchanger is connected to the second pipeline 22 and the inner circulation pipeline 21 in a quick connection manner, and the connection directions are the same. Furthermore, the plate heat exchanger is arranged outside the hot water system. The plate heat exchanger is arranged at the lower part of the hot water system, which is easy for the user to disassemble;

[0124] 3. The water inlet one-way valve (first one-way valve 81) is arranged on the first water inlet pipe 121, so that the inner circulation becomes a closed system, ensuring that high-temperature drinking water can be boiled;

[0125] 4. The problem of the inner circulation water pressure being too high after being heated is considered, and an internal relief method is used for pressure relief, which is safe and reliable.

[0126] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A water heater system capable of heating drinking water, characterized in that, It comprises: The first heat exchange component comprises a heat exchanger, and a water inlet pipeline and a water outlet pipeline connected to the inlet and outlet of the heat exchanger respectively, one end of the water inlet pipeline away from the heat exchanger is a first water inlet, one end of the water outlet pipeline away from the heat exchanger is a first water outlet, domestic water flows into the heat exchanger through the first water inlet and then flows out from the first water outlet after being heated, and a circulating water pump is arranged on the water inlet pipeline; The second heat exchange component comprises an inner circulation pipeline and a second pipeline in heat exchange with the inner circulation pipeline, two ends of the second pipeline are a second water inlet and a second water outlet respectively, drinking water flows into the second pipeline through the second water inlet and then flows out from the second water outlet after being heat exchanged with the inner circulation pipeline, an inlet of the inner circulation pipeline is communicated with the water outlet pipeline through a valve, and an outlet of the inner circulation pipeline is communicated with the water inlet pipeline; An outer circulation pipeline, an external tap water pipeline and a water use end, two ends of the outer circulation pipeline are connected with the first water inlet and the first water outlet respectively, the outer circulation pipeline is communicated with a hot water interface of the water use end, and the external tap water pipeline is communicated with the first water inlet and a cold water interface of the water use end respectively.

2. The water heater system of claim 1, wherein, The water heater system further comprises: A first temperature sensor arranged on the water outlet pipeline and close to the first water outlet, the first temperature sensor is used for detecting the temperature of the domestic water after heat exchange; A second temperature sensor arranged on the second pipeline and close to the second water outlet, the second temperature sensor is used for detecting the temperature of the drinking water after heat exchange.

3. The water heater system of claim 2, wherein, The water heater system further comprises: A third temperature sensor arranged on the water inlet pipeline and close to the first water inlet, the third temperature sensor is used for detecting the temperature of the domestic water before heat exchange; A fourth temperature sensor arranged on the second pipeline and close to the second water inlet, the fourth temperature sensor is used for detecting the temperature of the drinking water before heat exchange.

4. The water heater system of claim 1, wherein, A first flow sensor is arranged on the second pipeline and close to the second water inlet.

5. The water heater system of claim 1, wherein, The water inlet pipeline comprises a first water inlet pipeline and a second water inlet pipeline connected in sequence, the first water inlet, the first water inlet pipeline, the second water inlet pipeline and an inlet of the heat exchanger are communicated in sequence; The water heater system further comprises a three-way joint, the three-way joint is provided with a first interface, a second interface and a third interface, the first interface is communicated with the first water inlet through the first water inlet pipeline, the second interface is communicated with an outlet of the inner circulation pipeline, the third interface is communicated with the inlet of the heat exchanger through the second water inlet pipeline, and the circulating water pump is arranged on the second water inlet pipeline.

6. The water heater system of claim 5, wherein, The water heater system further comprises a one-way valve arranged on the first water inlet pipeline; and / or A second flow sensor is arranged on the second water inlet pipeline and close to the three-way joint.

7. The water heater system of claim 6, wherein, The water heater system further comprises a pressure relief pipeline, an inlet of the pressure relief pipeline is located on the first water inlet pipe and upstream of the one-way valve, an outlet of the pressure relief pipeline is located on the second water inlet pipe, and a pressure relief valve is arranged on the pressure relief pipeline.

8. The water heater system of claim 1, wherein, The water outlet pipeline comprises a first water outlet pipe and a second water outlet pipe connected in sequence, the outlet of the heat exchanger, the first water outlet pipe, the second water outlet pipe and the first water outlet are communicated in sequence. The valve is a three-way valve, the three-way valve is provided with an inlet, a first outlet and a second outlet, the inlet is communicated with the first water outlet pipe, the first outlet is communicated with the inlet of the internal circulation pipeline, and the second outlet is communicated with the second water outlet through the second water outlet pipe; the inlet of the three-way valve is switched between the two states of being communicated with the first outlet or being communicated with the second outlet.

9. The water heater system of any one of claims 1-8, wherein, The first heat exchange assembly further comprises a burner for heating the heat exchanger.

10. The water heater system of claim 9, wherein, The first heat exchange assembly further comprises an air inlet pipeline, one end of the air inlet pipeline is provided with a gas inlet, and the other end is communicated with the burner; a gas proportional valve is arranged on the air inlet pipeline.

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