Heat pump water heater system

Abstract

The utility model provides a kind of heat pump water heater system, including water subsystem, refrigerant subsystem, stirring component, switching element and water supply control element;Switching element has the first working position and the second working position of mutual switching, when switching element is in the first working position, the refrigerant in refrigerant subsystem passes through stirring component to drive stirring component to agitate water;And when switching element is in the second working position, the refrigerant in refrigerant subsystem does not pass through stirring component;Water supply control element controls the on-off state between water subsystem and user side by opening and closing operation;When water supply control element is disconnected, switching element is in the first working position;Wherein when water supply control element is closed, switching element is in the second working position;The utility model can ensure that water in water subsystem does not circulate during user water process, to ensure the comfort of user water.

Description

Technical Field

[0001] This utility model belongs to the field of heating technology, and more specifically, relates to a heat pump water heater system. Background Technology

[0002] Currently, heat pump water heaters generally employ a static heat exchange method using external microchannels. This method primarily relies on the refrigerant flowing through the microchannels to conduct heat from the microchannels to the inner tank wall, and then from the inner tank wall to the water inside the tank. During this static heating process, the water in the inner tank can only exchange heat through convection caused by differences in temperature and density, resulting in low heat exchange efficiency and issues such as poor condenser heat exchange and high pressure. To address this problem, existing technologies propose adding a flow-driven component to circulate the water in the tank. However, because the flow-driven component operates continuously, the water circulation during use causes a drop in temperature in the upper part of the tank, thus affecting the user's water experience. Utility Model Content

[0003] The purpose of this invention is to provide a heat pump water heater system to solve the problem of poor user comfort in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a heat pump water heater system, including a water subsystem connected to the user side, a refrigerant subsystem that performs static heat exchange with the water subsystem, and an agitation component for agitating the water in the water subsystem, and further including:

[0006] A switching element has a first working position and a second working position that can be switched between each other; when the switching element is in the first working position, the refrigerant in the refrigerant subsystem passes through the agitator to drive the agitator to agitate the water; while when the switching element is in the second working position, the refrigerant in the refrigerant subsystem does not pass through the agitator.

[0007] A water supply control element, which controls the on / off state between the water subsystem and the user side through opening and closing operations;

[0008] Specifically, when the water supply control element is disconnected, the switching element is in the first working position; when the water supply control element is closed, the switching element is in the second working position.

[0009] Furthermore, the water subsystem includes a water tank connected to the user side and a condenser installed on the water tank; the refrigerant subsystem includes a main refrigerant circulation path that passes through the condenser and the switching element in sequence, and a branch refrigerant circulation path that passes through the agitation assembly, with the two ends of the branch refrigerant circulation path connected to the switching element and the main refrigerant circulation path, respectively.

[0010] Furthermore, it also includes an upper temperature sensing element and a lower temperature sensing element respectively disposed on the upper and lower parts of the water tank; when the temperature difference measured by the upper temperature sensing element and the lower temperature sensing element is less than or equal to a preset temperature difference, the switching element is in the first working position.

[0011] Furthermore, the agitation assembly includes an active turbine component disposed in the refrigerant branch flow path and a driven turbine component disposed inside the water tank, wherein the active turbine component and the driven turbine component are connected through a transmission component.

[0012] Furthermore, the active turbine component includes a first volute communicating with the refrigerant branch flow path and a first turbine disposed inside the first volute; the driven turbine component includes a second volute communicating with the interior of the water tank and a second turbine disposed inside the second volute; the transmission component includes a transmission shaft connecting the first turbine and the second turbine.

[0013] Furthermore, the transmission component also includes a mounting joint, a first bearing, and a second bearing; the transmission shaft includes a raised intermediate shaft section, and a first shaft section and a second shaft section located on both sides of the raised intermediate shaft section, the first shaft section passing through the first turbine, and the second shaft section passing through the second turbine; one end of the mounting joint is fixedly connected to the side wall of the water tank, and the other end of the mounting joint is fixedly connected to the first shaft section by a first fastener; the first bearing is disposed between the first shaft section and the mounting joint, and the second bearing is disposed between the second shaft section and the mounting joint.

[0014] Furthermore, the fixed end of the second volute passes through the side wall of the water tank and extends into the interior of the mounting joint, and the fixed end of the second volute is fixedly connected to the mounting joint by a second fastener.

[0015] Furthermore, a first sealing element is provided between the mounting joint and the protruding intermediate shaft section, a second sealing element is provided between the second shaft section and the fixed end of the second volute, and a third sealing element is provided in the area between the mounting joint and the second volute and located inside the water tank.

[0016] Furthermore, a speed-increasing and cooling element is provided in the main refrigerant circulation path between the condenser and the switching element.

[0017] Furthermore, the switching element is a three-way solenoid valve. When the three-way solenoid valve is not energized, it is in the first working position; when the three-way solenoid valve is energized, it is in the second working position.

[0018] Compared with the prior art, the beneficial effects of the heat pump water heater system provided by this utility model are as follows: This utility model can ensure that the water in the water subsystem does not circulate during the user's water use process, effectively solving the problem that the outlet water temperature decreases due to the water circulation caused by the stirring component during the user's water use process, thereby ensuring the user's water use comfort. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of an existing heat pump water heater system.

[0021] Figure 2 This is a structural diagram of the heat pump water heater system of this utility model;

[0022] Figure 3 This is a partial structural diagram of the heat pump water heater system of this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram of the system control part of this utility model;

[0025] The main markings in the attached figures are as follows:

[0026] 1. Water subsystem; 2. Refrigerant subsystem; 3. Agitator assembly;

[0027] 11. Water tank; 12. Condenser; 13. Inlet water path; 14. Outlet water path;

[0028] 21. Refrigerant main circulation path; 22. Refrigerant branch circulation path; 23. Compressor; 24. Four-way valve; 25. Evaporator; 26. First filter; 27. Throttling element; 28. Second filter; 29. ​​Speed-up and cooling element; 210. Third filter;

[0029] 31. First volute; 32. First turbine; 33. Second volute; 34. Second turbine; 35. Drive shaft; 36. Mounting joint; 37. First bearing; 38. Second bearing; 39. First fastener; 310. Second fastener; 311. First sealing element; 312. Second sealing element; 313. Third sealing element;

[0030] 41. Switching element; 42. Water supply control element; 43. Controller;

[0031] 51. Upper temperature sensing element; 52. Lower temperature sensing element. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] Currently, heat pump water heaters generally employ a static heat exchange heating method using external microchannels. This method transfers heat through refrigerant flowing within the microchannels, which then conducts heat from the microchannels to the inner tank wall, and finally from the inner tank wall to the water inside the tank. During this static heating process, the water in the inner tank can only exchange heat through convection caused by differences in its own temperature and density, resulting in low heat exchange efficiency and issues such as poor condenser heat exchange and high pressure.

[0034] In this regard, such as Figure 1 As shown, an existing patent (publication number CN112229060A) proposes to circulate the water in the tank by adding a flow-driven component. However, in practical applications, the continuous operation of the flow-driven component causes the water in the tank to circulate continuously during user water use, which in turn lowers the water temperature in the upper part of the tank, thus affecting the user's water experience.

[0035] Please refer to the following: Figure 2 , Figure 3 and Figure 4 In some embodiments of this utility model, the heat pump water heater system includes a water subsystem 1 connected to the user side, a refrigerant subsystem 2 that performs static heat exchange with the water subsystem 1, and an agitation component 3 for agitating the water in the water subsystem 1; simultaneously, the heat pump water heater system also includes:

[0036] The switching element 41 has a first working position and a second working position that can be switched between each other. When the switching element 41 is in the first working position, the refrigerant in the refrigerant subsystem 2 passes through the agitator 3 to drive the agitator 3 to agitate the water. When the switching element 41 is in the second working position, the refrigerant in the refrigerant subsystem 2 does not pass through the agitator 3.

[0037] Water supply control element 42 controls the on / off state between water subsystem 1 and user side through opening and closing operations;

[0038] When the water supply control element 42 is disconnected, the switching element 41 is in the first working position; when the water supply control element 42 is closed, the switching element 41 is in the second working position.

[0039] This invention adds a switching element 41 and a water supply control element 42, and switches the working position of the water supply control element 42 according to its open / closed state. This ensures that the water in the water subsystem 1 does not circulate during user water use. This invention effectively solves the problem of water temperature decreasing due to water circulation caused by the agitator 3 during user water use, thus ensuring user comfort.

[0040] In a preferred embodiment, the water subsystem 1 includes a water tank 11 connected to the user side and a condenser 12 disposed on the water tank 11; the refrigerant subsystem 2 includes a refrigerant main circulation path 21 that passes through the condenser 12 and the switching element 41 in sequence, and a refrigerant branch path 22 that passes through the agitation component 3, with the two ends of the refrigerant branch path 22 connected to the switching element 41 and the refrigerant main circulation path 21 respectively.

[0041] It should be noted that the upper part of the water tank 11 is provided with a water outlet flow path 14, and a water flow switch is provided on the water outlet flow path 14 as a water supply control element 42. The lower part of the water tank 11 is provided with a water inlet flow path 13. The condenser 12 is a microchannel heat exchanger. The refrigerant main circulation flow path 21 is provided with a compressor 23, a four-way valve 24, an evaporator 25, a first filter 26, a throttling element 27, and a second filter 28.

[0042] This invention achieves static heating of water in water tank 11 by having the refrigerant flow through the condenser 12 in the main refrigerant circulation path 21. Simultaneously, by adjusting the working position of the switching element 41, it can be determined whether the refrigerant flows through the agitator 3. When the refrigerant flows through the agitator 3, it drives the agitator 3 to circulate the water in water tank 11, effectively improving the heat exchange efficiency between water and refrigerant. When the refrigerant does not flow through the agitator 3, the water in water tank 11 maintains a stratified state, with the water temperature distributed from high to low from top to bottom, ensuring the stability of the outlet water temperature of water subsystem 1, thereby improving the user's water comfort.

[0043] In a preferred embodiment, the device further includes an upper temperature sensing element 51 and a lower temperature sensing element 52 respectively disposed on the upper and lower parts of the water tank 11; when the temperature difference measured by the upper temperature sensing element 51 and the lower temperature sensing element 52 is less than or equal to a preset temperature difference, the switching element 41 is in a first working position.

[0044] This invention can adjust the position of the switching element 41 according to the temperature difference between the upper and lower parts of the water tank 11 to determine whether the refrigerant flows through the agitator 3. When the temperature difference between the upper and lower parts of the water tank 11 is low, the switching element 41 is in the first working position, allowing the refrigerant to flow through the agitator 3, thereby driving the agitator 3 to circulate the water in the water tank 11, effectively improving the heat exchange performance; conversely, when the temperature difference between the upper and lower parts of the water tank 11 is high, the switching element 41 is in the second working position, preventing the refrigerant from flowing through the agitator 3.

[0045] In a preferred embodiment, the agitation assembly 3 includes an active turbine component disposed in the refrigerant branch flow path 22 and a driven turbine component disposed inside the water tank 11, the active turbine component and the driven turbine component being connected by a transmission component.

[0046] This invention effectively increases the circulating water volume inside the water tank 11 by placing the driven turbine component inside the water tank 11, making the water circulation more complete and thus further improving the heat exchange performance.

[0047] In a preferred embodiment, the active turbine component includes a first volute 31 communicating with the refrigerant branch flow path 22 and a first turbine 32 disposed inside the first volute 31; the driven turbine component includes a second volute 33 communicating with the interior of the water tank 11 and a second turbine 34 disposed inside the second volute 33; and the transmission component includes a transmission shaft 35 connecting the first turbine 32 and the second turbine 34.

[0048] It should be noted that the driven turbine component of this utility model is located at the lower part of the water tank 11 and close to the water inlet channel.

[0049] This invention places the first turbine 32 inside the first volute 31 and the second turbine 34 inside the second volute 33, so that the refrigerant in the refrigerant branch flow path 22 can drive the first turbine 32 to rotate after entering the first volute 31. Under the transmission action of the drive shaft 35, the first turbine 32 then drives the second turbine 34 to rotate, thereby realizing the circulation of water in the water tank 11.

[0050] In a preferred embodiment, the transmission component further includes a mounting joint 36, a first bearing 37, and a second bearing 38; the transmission shaft 35 includes a raised intermediate shaft section, and a first shaft section and a second shaft section located on both sides of the raised intermediate shaft section, the first shaft section passing through the first turbine 32, and the second shaft section passing through the second turbine 34; one end of the mounting joint 36 is fixedly connected to the side wall of the water tank 11, and the other end of the mounting joint 36 is fixedly connected to the first shaft section by a first fastener 39; the first bearing 37 is disposed between the first shaft section and the mounting joint 36, and the second bearing 38 is disposed between the second shaft section and the mounting joint 36.

[0051] This utility model, through the ingenious arrangement of the positions and connection relationships of the mounting joint 36, the first bearing 37, the second bearing 38, and the drive shaft 35, ensures that the drive shaft 35 can effectively drive the second turbine 34 to rotate when the first turbine 32 rotates, while ensuring that the drive shaft 35 remains stable during rotation and does not wobble up or down or left or right, thereby improving the stability and reliability of the overall structure.

[0052] In a preferred embodiment, the fixed end of the second volute passes through the side wall of the water tank 11 and extends into the interior of the mounting joint 36, and the fixed end of the second volute is fixedly connected to the mounting joint 36 by the second fastener 310.

[0053] This invention ensures the stability of the second volute installation by firmly connecting the fixed end of the second volute to the mounting joint 36, thereby guaranteeing the reliability of water circulation in the water tank 11.

[0054] In a preferred embodiment, a first sealing element 311 is provided between the mounting joint 36 and the raised intermediate shaft section, a second sealing element 312 is provided between the second shaft section and the fixed end of the second volute, and a third sealing element 313 is provided in the area between the mounting joint 36 and the second volute 33 and located inside the water tank 11.

[0055] This invention is equipped with sealing elements at several key locations of the agitator 3, which effectively prevents water from overflowing from the water tank 11, thereby avoiding damage to the transmission components and ensuring the structural reliability of the agitator 3.

[0056] In a preferred embodiment, a speed-up and cooling element 29 is provided in the main refrigerant circulation path 21 between the condenser 12 and the switching element 41.

[0057] It should be noted that the speed-increasing and cooling element 29 can be either a capillary tube or an electronic expansion valve. If an electronic expansion valve is used as the speed-increasing and cooling element 29, its opening can be adjusted in real time according to the actual needs of the system, thereby achieving precise control of the turbine flow.

[0058] This invention can also include an acceleration and cooling element 29, which is used to throttle the refrigerant flowing out of the condenser 12. Due to the pressure difference throttling effect, the refrigerant flow rate is increased, which is more conducive to driving the first turbine 32 to rotate.

[0059] In a preferred embodiment, the switching element 41 is a three-way solenoid valve. When the three-way solenoid valve is not energized, it is in a first operating position; when it is energized, it is in a second operating position. The energization or de-energization of the three-way solenoid valve is controlled by the controller 43.

[0060] This utility model uses a three-way solenoid valve as a switching element 41. By controlling whether it is energized or not, the working position of the three-way solenoid valve can be changed. It is convenient to operate and easy to implement.

[0061] It should be noted that in other alternative embodiments, a non-electromagnetically driven flow path switching structure may also be used as the switching element 41.

[0062] To help understand this utility model, the following will describe in general terms a preferred embodiment of the heat pump water heater system with reference to the accompanying drawings.

[0063] like Figures 2 to 4 As shown, the heat pump water heater system mainly includes a water subsystem 1, a refrigerant subsystem 2, an agitator 3, a switching element 41 (three-way solenoid valve), a water supply control element 42 (water flow switch), an upper temperature sensing element 51, a lower temperature sensing element 52, and a controller 43.

[0064] The water subsystem 1 includes a water tank 11 and a condenser 12 (microchannel heat exchanger). The water tank 11 is connected to the user side, and the condenser 12 is installed on the water tank 11. The upper part of the water tank 11 is provided with a water outlet path 14 and an upper temperature sensing element 51, and a water supply control element 42 is provided on the water outlet path 14. The lower part of the water tank 11 is provided with a water inlet path 13 and a lower temperature sensing element 52.

[0065] The refrigerant subsystem 2 includes a main refrigerant circulation path 21 and a branch refrigerant circulation path 22. The main refrigerant circulation path 21 contains a compressor 23, a four-way valve 24, an evaporator 25, a first filter 26, a throttling element 27, and a second filter 28. The throttling element 27 is an electronic expansion valve. The main refrigerant circulation path 21 also flows through a condenser 12, a third filter 210, a speed-increasing cooling element 29 (capillary tube), and a switching element 41. The branch refrigerant circulation path 22 flows through an agitator assembly 3.

[0066] The agitation assembly 3 includes an active turbine component, a driven turbine component, and a transmission component. The active turbine component includes a first volute 31 communicating with the refrigerant branch flow path 22, and a first turbine 32 disposed inside the first volute 31. The driven turbine component includes a second volute 33 communicating with the interior of the water tank 11, and a second turbine 34 disposed inside the second volute 33. The transmission component includes a drive shaft 35, a mounting joint 36, a first bearing 37, and a second bearing 38. The drive shaft 35 includes a raised intermediate shaft section, and a first shaft section and a second shaft section located on either side of the raised intermediate shaft section. The first shaft section passes through the first turbine 32, and the second shaft section passes through the second turbine 34. One end of the mounting joint 36 is fixedly connected to the side wall of the water tank 11, and the other end of the mounting joint 36 is fixedly connected to the first shaft section via a first fastener 39. The first bearing 37 is disposed between the first shaft section and the mounting joint 36, and the second bearing 38 is disposed between the second shaft section and the mounting joint 36. Furthermore, the fixed end of the second volute passes through the side wall of the water tank 11 and extends into the interior of the mounting joint 36, and the fixed end of the second volute is fixedly connected to the mounting joint 36 by a second fastener 310. In addition, a first sealing element 311 is provided between the mounting joint 36 and the protruding intermediate shaft section, a second sealing element 312 is provided between the second shaft section and the fixed end of the second volute, and a third sealing element 313 is provided in the area between the mounting joint 36 and the second volute 33 located inside the water tank 11.

[0067] Based on the above-described structure of the heat pump water heater system, its specific working principle is explained as follows:

[0068] When the refrigerant subsystem 2 is running, the compressor 23 is energized during heating. High-pressure, high-temperature gaseous refrigerant is discharged from the compressor 23's exhaust port, enters port D of the four-way valve 24, and flows out from port C, flowing through the connecting pipe into the water tank 11 and condenser 12 for condensation. After condensation, the high-pressure liquid refrigerant flows out of the condenser 12 and enters the capillary tube for primary throttling. Due to the pressure difference, the refrigerant flow rate increases after throttling, flowing to the three-way solenoid valve. When the logic judgment condition is met, the coil of the three-way solenoid valve is not energized, ports A and C are connected, and port B is disconnected. The refrigerant flows in from port A and out from port C, entering the active turbine component and driving the first turbine 32 to rotate. At the same time, the pressure and temperature of the throttled refrigerant decrease, absorbing heat from the air through the first turbine 32. After passing through the first turbine 32, the refrigerant passes through the second filter 28 to the electronic expansion valve for secondary throttling. The low-temperature, low-pressure liquid refrigerant after throttling enters the evaporator 25 for evaporation. The evaporated low-pressure, low-temperature gaseous refrigerant enters through port E of the four-way valve 24, flows out through port S, and then enters the air inlet of the compressor 23.

[0069] Meanwhile, the water subsystem 1 operates. When the first turbine 32 in the active turbine component rotates, it drives the second turbine 34 in the driven turbine component to rotate via the drive shaft 35. The rotation of the second turbine 34 circulates the water in the inner tank 11, increasing the contact between the water and the inner tank wall per unit time, thereby improving heat exchange efficiency and ensuring that the refrigerant is fully condensed in the condenser 12, keeping the system pressure low. When the logical judgment condition is met, the coil of the three-way solenoid valve is energized, connecting ports A and B and disconnecting from port C. The refrigerant flows in from port A and out from port B, returning to the outdoor unit. Without passing through the agitator 3, the turbine does not operate, and the water inside the water tank 11 does not circulate.

[0070] During the defrosting phase of refrigerant subsystem 2, compressor 23 is energized and operates, while four-way valve 24 is energized and reversed. At this time, high-pressure, high-temperature refrigerant gas is discharged from the compressor 23 exhaust port, enters port D of four-way valve 24, and flows out from port E, subsequently flowing into evaporator 25 for condensation. After condensation, high-pressure liquid refrigerant flows out of evaporator 25, passes through first filter 26, and then enters electronic expansion valve for primary throttling. The throttled refrigerant flows into second filter 28, and then through connecting pipe into active turbine component, driving first turbine 32 to reverse. Next, the refrigerant enters capillary tube for secondary throttling, and the low-pressure, low-temperature refrigerant after secondary throttling flows into condenser 12 of water tank 11 for evaporation. The evaporated low-pressure, low-temperature gaseous refrigerant enters from port C of four-way valve 24, flows out from port S, and then enters compressor 23 intake port.

[0071] Meanwhile, the water subsystem 1 is also in operation. When the first turbine 32 in the active turbine component reverses, it drives the second turbine 34 in the driven turbine component to reverse via the drive shaft 35. The turbine reversal causes the water in the inner tank 11 to circulate, increasing the contact between the water and the inner tank wall, thereby improving heat exchange efficiency, shortening defrosting time, increasing the system's heating time and frequency, and further improving heat exchange efficiency and system reliability.

[0072] like Figure 5 As shown, the system control section works as follows: In the initial state, when the water temperature inside water tank 11 is 5°C lower than the user-set temperature, the unit starts operating. The system monitors the upper temperature sensor T1, the lower temperature sensor T2, and the water flow switch signal in real time. When the temperature difference between T1 and T2 is greater than W (W is set to 3°C) or the water flow switch signal is in the closed (ON) state, the three-way solenoid valve is energized, connecting ports A and B and disconnecting from port C. At this time, the refrigerant does not flow through the agitator component 3. Conversely, when the temperature difference between T1 and T2 is less than or equal to W (W is set to 3°C) and the water flow switch signal is in the open (OFF) state, the three-way solenoid valve is not energized, connecting ports A and C and disconnecting from port B. The refrigerant then flows through the agitator component 3. Under these conditions, the water inside water tank 11 is circulated by the agitator component 3, thereby improving the system's heat exchange efficiency.

[0073] The above solutions aim to solve the problem that the water temperature at the top of the water tank 11 drops due to the turbine driving the water circulation during the user's water use process, which affects the user's water use experience; at the same time, it also effectively solves the problem that the temperature difference between the top and bottom of the water inside the water tank 11 is too low during system operation, resulting in poor heat exchange performance.

[0074] Compared to existing technologies, the main innovation of this invention lies in placing the driven turbine component inside the water tank and adding a flow switch, a three-way solenoid valve, and a system control unit. This invention effectively solves the problem of water temperature drop in the upper part of the tank due to the turbine driving water circulation during user water use, thus affecting the user's water experience. It also solves the problem of poor heat exchange performance caused by insufficient temperature difference between the upper and lower parts of the water inside the tank during system operation. This invention not only effectively improves the circulation efficiency of the water in the inner tank during heat exchange, thereby improving heat exchange efficiency and solving problems such as poor condenser heat exchange and high pressure, but also meets the comfort requirements of the unit in different usage scenarios.

[0075] In the description of this utility model, it should be understood that, unless otherwise expressly specified and limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it may be directly connected to or indirectly connected to the other element.

[0076] Furthermore, the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0077] 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.

[0078] Furthermore, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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 according to the specific circumstances.

[0079] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat pump water heater system, comprising a water subsystem connected to a user side, a refrigerant subsystem for static heat exchange with the water subsystem, and an agitation component for agitating the water in the water subsystem, characterized in that, Also includes: A switching element has a first working position and a second working position that can be switched between each other; when the switching element is in the first working position, the refrigerant in the refrigerant subsystem passes through the agitator to drive the agitator to agitate the water; while when the switching element is in the second working position, the refrigerant in the refrigerant subsystem does not pass through the agitator. A water supply control element, which controls the on / off state between the water subsystem and the user side through opening and closing operations; Specifically, when the water supply control element is disconnected, the switching element is in the first working position; when the water supply control element is closed, the switching element is in the second working position.

2. The heat pump water heater system as described in claim 1, characterized in that, The water subsystem includes a water tank connected to the user side and a condenser installed on the water tank; the refrigerant subsystem includes a main refrigerant circulation path that passes through the condenser and the switching element in sequence, and a branch refrigerant circulation path that passes through the agitation assembly, with the two ends of the branch refrigerant circulation path connected to the switching element and the main refrigerant circulation path, respectively.

3. The heat pump water heater system as described in claim 2, characterized in that, It also includes an upper temperature sensing element and a lower temperature sensing element respectively disposed on the upper and lower parts of the water tank; when the temperature difference measured by the upper temperature sensing element and the lower temperature sensing element is less than or equal to a preset temperature difference, the switching element is in the first working position.

4. The heat pump water heater system as described in claim 2, characterized in that, The agitation assembly includes an active turbine component disposed in the refrigerant branch flow path and a driven turbine component disposed inside the water tank. The active turbine component and the driven turbine component are connected through a transmission component.

5. The heat pump water heater system as described in claim 4, characterized in that, The active turbine component includes a first volute communicating with the refrigerant branch flow path and a first turbine disposed inside the first volute; the driven turbine component includes a second volute communicating with the interior of the water tank and a second turbine disposed inside the second volute; the transmission component includes a transmission shaft connecting the first turbine and the second turbine.

6. The heat pump water heater system as described in claim 5, characterized in that, The transmission component further includes a mounting joint, a first bearing, and a second bearing; the transmission shaft includes a raised intermediate shaft section, and a first shaft section and a second shaft section located on both sides of the raised intermediate shaft section, the first shaft section passing through the first turbine, and the second shaft section passing through the second turbine; one end of the mounting joint is fixedly connected to the side wall of the water tank, and the other end of the mounting joint is fixedly connected to the first shaft section by a first fastener; the first bearing is disposed between the first shaft section and the mounting joint, and the second bearing is disposed between the second shaft section and the mounting joint.

7. The heat pump water heater system as described in claim 6, characterized in that, The fixed end of the second volute passes through the side wall of the water tank and extends into the interior of the mounting joint, and the fixed end of the second volute is fixedly connected to the mounting joint by a second fastener.

8. The heat pump water heater system as described in claim 6, characterized in that, A first sealing element is provided between the mounting joint and the protruding intermediate shaft section, a second sealing element is provided between the second shaft section and the fixed end of the second volute, and a third sealing element is provided in the area between the mounting joint and the second volute and located inside the water tank.

9. The heat pump water heater system as described in claim 2, characterized in that, A speed-increasing and cooling element is provided in the main refrigerant circulation path between the condenser and the switching element.

10. The heat pump water heater system as described in claim 1, characterized in that, The switching element is a three-way solenoid valve. When the three-way solenoid valve is not energized, it is in the first working position; when the three-way solenoid valve is energized, it is in the second working position.

Images