Heat pump hot water unit and air heat pump system

Abstract

The utility model relates to the technical field of heat pump systems, and provides a heat pump hot water unit and an air heat pump system, the unit comprises a buffer water tank and a plurality of indoor tail ends, the water inlet ends of the plurality of indoor tail ends are communicated with the buffer water tank, and the water outlet ends of the plurality of indoor tail ends are communicated with the buffer water tank; main path control valves are arranged between the water inlet ends of the indoor tail ends and the buffer water tank, and each main path control valve can independently adjust the on-off state of the corresponding indoor tail end, so that the heating or refrigerating requirements of different areas are met according to the requirements; a water mixing valve is arranged between the water inlet end of at least one indoor tail end and the buffer water tank, the water mixing valve is connected between the water outlet end of the corresponding indoor tail end and the buffer water tank, the water supply temperature of the corresponding indoor tail end is adjusted through the water mixing valve, the differential temperatures of different indoor tail ends are achieved, and therefore the user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump system technology, and in particular to a heat pump water heater unit and an air heat pump system. Background Technology

[0002] An air source heat pump system is a highly efficient energy conversion device that extracts low-grade heat energy from the ambient air, raises its temperature using a compressor, and then transfers heat to the room to provide heating in winter. Its working principle is based on the reverse Carnot cycle and mainly consists of core components such as an evaporator, compressor, condenser, and expansion valve. In winter operation mode, the evaporator absorbs heat from the outdoor air, and the refrigerant evaporates into a low-temperature, low-pressure gas in the evaporator. After being compressed by the compressor into a high-temperature, high-pressure gas, it then exchanges heat with the indoor circulating water in the condenser, releasing heat to heat the water. Finally, the heat is supplied to the room through terminal heat dissipation devices (such as fan coil units, underfloor heating, and radiators).

[0003] In existing technologies, heat pump water heaters typically use a single heat source to supply multiple indoor terminals (such as fan coil units, underfloor heating, and radiators). However, due to differences in insulation performance, space size, and heat load requirements in different areas, the temperature regulation capacity of each area is limited. For example, in large buildings, areas far from the main unit may experience delayed heating or uneven temperature, while areas closer to the main unit may overheat, resulting in a poor user experience. Utility Model Content

[0004] This utility model provides a heat pump water heater unit and an air heat pump system to solve the defects of poor user experience in the prior art, realize differentiated temperature of different indoor terminals, and thus improve user experience.

[0005] This utility model provides a heat pump water heater unit, including:

[0006] Buffer water tank;

[0007] Multiple indoor terminals are provided, with their inlet terminals connected to the buffer water tank and their outlet terminals connected to the buffer water tank. A main control valve is provided between the inlet terminals of the indoor terminals and the buffer water tank. A mixing valve is provided between the inlet terminals of at least one indoor terminal and the buffer water tank, and the mixing valve is connected between the outlet terminal of the corresponding indoor terminal and the buffer water tank.

[0008] According to the present invention, a heat pump water heater unit is provided in which the water inlet ends of a plurality of indoor terminals are connected to the buffer water tank through a water supply pipeline;

[0009] The inlet end of the water supply pipeline is connected to the buffer water tank, and the outlet end of the water supply pipeline has multiple water supply branch pipes. Each of the multiple water supply branch pipes is connected to the inlet end of each of the multiple indoor terminals. Each water supply branch pipe is equipped with the main control valve.

[0010] According to the present invention, a heat pump water heater unit also includes a controller, and a main circuit temperature sensor is provided between the mixing valve and the indoor terminal. The controller is electrically connected to the main circuit temperature sensor and the mixing valve respectively.

[0011] According to the present invention, a heat pump water heater unit includes multiple indoor terminals, each of which includes a fan coil unit and a heating element, wherein the heating element includes a radiator and / or a floor heating coil.

[0012] The mixing valve is provided between the heating element and the buffer water tank.

[0013] According to the present invention, a heat pump water heater unit is provided, wherein there are multiple heating elements, and the multiple heating elements are connected to the corresponding water supply branch pipes through a diversion component, and the diversion component is used to adjust the flow rate of the multiple heating elements.

[0014] According to the present invention, a heat pump water heater unit includes a flow distribution component comprising:

[0015] The branch pipe has an inlet end connected to the water supply branch pipe and an outlet end with multiple branch pipes, each of which is connected to a corresponding heating component.

[0016] Multiple branch control valves are provided, one-to-one with each of the multiple branch pipes.

[0017] According to the present invention, a heat pump water heater unit is provided, wherein the heating component is equipped with a branch temperature sensor, and the controller is electrically connected to the branch temperature sensor and the branch control valve.

[0018] According to the present invention, the indoor terminal of a heat pump water heater unit further includes a ceiling coil.

[0019] According to the present invention, a heat pump water heater unit is provided with a heat-conducting layer on the outer wall of the heating element.

[0020] This utility model also provides an air heat pump system, including any one of the heat pump water heaters described above.

[0021] The heat pump water heater unit provided by this utility model forms an independent circulation loop by connecting multiple indoor terminals to a buffer water tank, and sets a main control valve at the water inlet of each indoor terminal. Each main control valve can independently adjust the on / off state of the corresponding indoor terminal, thereby meeting the heating or cooling needs of different areas according to requirements. Furthermore, by adding a mixing valve at the water inlet of at least one indoor terminal, the water supply temperature of the corresponding indoor terminal can be adjusted through the mixing valve to achieve differentiated temperatures for different indoor terminals, thereby improving the user experience. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is one of the structural schematic diagrams of the heat pump water heater unit provided by this utility model.

[0024] Figure 2 This is the second structural schematic diagram of the heat pump water heater unit provided by this utility model.

[0025] Figure 3 This is a structural schematic diagram of the air heat pump system provided by this utility model.

[0026] Figure label:

[0027] 01. Fan coil unit; 02. Radiator; 03. Underfloor heating coil; 04. Ceiling heating coil; 05. Water supply pipeline; 06. Return pipeline; 07. Branch control valve; 08. Diversion pipeline;

[0028] 1. Main unit; 2. Wired controller; 3. External electric heater; 4. Expansion tank; 5. Three-way reversing valve; 6. Solar panel water temperature sensor; 7. Solar panel; 8. Domestic hot water electric heater; 9. Domestic hot water tank; 10. Domestic hot water tank temperature sensor; 11. Hot water circuit temperature sensor; 12. Shower head; 13. Check valve; 14. Main water pump; 15. Buffer tank; 16. Water circuit temperature sensor; 17. Buffer tank temperature sensor;

[0029] 18. Main control valve for Zone 1; 19. Water pump for Zone 1; 20. Bypass valve; 21. Main control valve for Zone 2; 22. Mixing valve for Zone 2; 23. Water pump for Zone 2; 24. Temperature sensor for main line of Zone 2; 25. Main control valve for Zone 3; 26. Mixing valve for Zone 3; 27. Water pump for Zone 3; 28. Temperature sensor for main line of Zone 3; 29. ​​Thermostat for Zone 1; 30. Thermostat for Zone 2; 31. Branch temperature sensor for Zone 2; 32. Branch temperature sensor for Zone 3; 33. Thermostat for Zone 3. Detailed Implementation

[0030] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0031] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0033] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] The following is combined Figures 1-3 This invention describes a heat pump water heater unit.

[0036] The first aspect of this utility model provides a heat pump water heater unit, such as... Figure 1 As shown, the heat pump water heater unit includes a buffer tank 15 and multiple indoor terminals. The inlet of the multiple indoor terminals is connected to the buffer tank 15, and the outlet of the multiple indoor terminals is connected to the buffer tank 15, so that a fluid circulation loop is formed between each indoor terminal and the buffer tank 15.

[0037] A main control valve is provided between the water inlet of the indoor terminal and the buffer water tank 15; a mixing valve is provided between the water inlet of at least one indoor terminal and the buffer water tank 15, and the mixing valve is connected between the water outlet of the corresponding indoor terminal and the buffer water tank 15.

[0038] It is understandable that the heat pump water heater unit includes a buffer water tank 15 and multiple indoor terminals. The inlet and outlet of each indoor terminal are connected to the buffer water tank 15 to form an independent circulation loop. A main control valve is installed between the inlet of the indoor terminal and the buffer water tank 15 to regulate the on / off state of each indoor terminal.

[0039] It should be noted that each indoor terminal is equipped with a main control valve. Each main control valve can independently adjust the on / off status of its corresponding indoor terminal, enabling the system to provide differentiated heating or cooling according to actual needs. Furthermore, the main control valve on each indoor terminal allows for isolation and maintenance in case of a malfunction in a single indoor terminal, by closing the corresponding valve without affecting the normal operation of other indoor terminals.

[0040] It is understandable that a mixing valve is added to the inlet of at least one indoor terminal. This mixing valve is connected to the return water pipe between the outlet of the indoor terminal and the buffer water tank 15. By mixing in some return water through the mixing valve, the water supply temperature of the indoor terminal is adjusted, thereby meeting the differentiated temperature requirements of different indoor terminals and achieving precise temperature control.

[0041] For example, there are two indoor terminals, referred to as the first indoor terminal and the second indoor terminal. The indoor area corresponding to the first indoor terminal is referred to as Zone 1, and the indoor area corresponding to the second indoor terminal is referred to as Zone 2. A mixing valve is installed between the water inlet of the second indoor terminal and the buffer water tank 15, and the mixing valve is connected between the water outlet of the second indoor terminal and the buffer water tank 15. In heating mode, the water temperature output by the buffer water tank 15 is 35°, so the water temperature entering the first indoor terminal is 35°. Under the action of the mixing valve, the water temperature entering the second indoor terminal is reduced, for example, by 30°, thereby achieving a temperature difference between the corresponding areas of the first and second indoor terminals.

[0042] It should be noted that in cooling mode, the water temperature output by buffer tank 15 is 10°C, so the inlet water temperature entering the first indoor terminal is 10°C. Under the action of the mixing valve, the inlet water temperature entering the second indoor terminal is increased, for example, to 13°C.

[0043] The heat pump water heater unit provided in this embodiment of the utility model forms an independent circulation loop by connecting multiple indoor terminals to a buffer water tank 15, and sets a main control valve at the water inlet of each indoor terminal. Each main control valve can independently adjust the on / off state of the corresponding indoor terminal, thereby realizing the heating or cooling needs of different areas according to the requirements. Furthermore, by adding a mixing valve at the water inlet of at least one indoor terminal, the water supply temperature of the corresponding indoor terminal can be adjusted through the mixing valve to achieve differentiated temperatures for different indoor terminals, thereby improving the user experience.

[0044] In one embodiment of this utility model, such as Figure 1 As shown, the inlet of multiple indoor terminals is connected to the buffer water tank 15 through the water supply pipe 05, and the outlet of multiple indoor terminals is connected to the buffer water tank 15 through the return water pipe 06.

[0045] For example, the inlet of the water supply pipeline 05 is connected to the outlet of the buffer water tank 15, and the inlet of the water supply pipeline 05 is equipped with a main water pump 14; the outlet of the water supply pipeline 05 has multiple water supply branch pipes, the number of which is equal to the number of indoor terminals, and the multiple water supply branch pipes are connected to the inlet of the multiple indoor terminals one by one, and each water supply branch pipe is equipped with a main control valve.

[0046] The outlet of the return water pipe 06 is connected to the inlet of the buffer water tank 15. The inlet of the return water pipe 06 has multiple return water branch pipes. The number of return water branch pipes is equal to the number of indoor terminals. The multiple return water branch pipes are connected to the outlets of the multiple indoor terminals one by one.

[0047] Optionally, multiple indoor terminals include fan coil units 01 and heating components. The heating components can be radiators 02 or underfloor heating coils 03. Of course, the heating components can include both radiators 02 and underfloor heating coils 03. A mixing valve is provided between the heating components and the buffer water tank 15.

[0048] For example, there are three indoor terminals: the first indoor terminal, the second indoor terminal, and the third indoor terminal. The first indoor terminal includes a fan coil unit 01, the second indoor terminal includes a radiator 02, and the third indoor terminal includes a floor heating coil 03. The indoor area corresponding to the first indoor terminal is denoted as Zone 1, the indoor area corresponding to the second indoor terminal is denoted as Zone 2, and the indoor area corresponding to the third indoor terminal is denoted as Zone 3.

[0049] The outlet of water supply pipeline 05 has three water supply branch pipes, namely the first water supply branch pipe connected to the end of the first indoor unit, the second water supply branch pipe connected to the end of the second indoor unit, and the third water supply branch pipe connected to the end of the third indoor unit. A bypass valve 20 is installed between the first water supply branch pipe and the corresponding return water branch pipe. The main control valves on the first water supply branch pipe, the second water supply branch pipe, and the third water supply branch pipe are respectively designated as the main control valve 18 of area one, the main control valve 21 of area two, and the main control valve 25 of area three, which are used to control the opening and closing of the end of the first indoor unit, the end of the second indoor unit, and the end of the third indoor unit, respectively.

[0050] Mixing valves are also installed on the second and third water supply branch pipes, referred to as area two mixing valve 22 and area three mixing valve 26, respectively. Meanwhile, area two mixing valve 22 is connected to the return water branch pipe between the water outlet at the end of the second indoor unit and the buffer water tank 15, and area three mixing valve 26 is connected to the return water branch pipe between the water outlet at the end of the third indoor unit and the buffer water tank 15.

[0051] Each water supply branch pipe is equipped with a water pump. Specifically, the first water supply branch pipe is equipped with a zone one water pump 19, the second water supply branch pipe is equipped with a zone two water pump 23, and the third water supply branch pipe is equipped with a zone three water pump 27.

[0052] Understandably, the three main control valves can independently adjust the on / off status of the three indoor terminals, thereby controlling the working status of the three indoor terminals as needed; for example, it can realize the simultaneous operation of fan coil unit 01, radiator 02, and underfloor heating coil 03, or any one of fan coil unit 01, radiator 02, and underfloor heating coil 03, or any two of fan coil unit 01, radiator 02, and underfloor heating coil 03.

[0053] It should be noted that in traditional heat pump systems, radiators and underfloor heating coils typically operate in a simultaneous on / off control manner. While this allows for synchronized operation of the fan coil unit, radiators, and underfloor heating coils in heating mode, when the user only needs to activate the fan coil unit and underfloor heating coil combination, the system's forced linkage causes the radiators to turn on simultaneously, resulting in heat waste as areas that do not require heating (the areas corresponding to the radiators) are also forced to be heated. In contrast, the fan coil unit 01, radiator 02, and underfloor heating coil 03 of this application can be independently controlled via their respective main circuit control valves. This allows each of these units to be activated individually or in any combination. When the user only needs to activate the fan coil unit 01 and underfloor heating coil 03, the radiator 02 circuit can be shut off, preventing heating of areas that do not require heating.

[0054] It should be noted that in hot / cold mode, cooling can be achieved through fan coil unit 01, radiator 02, and underfloor heating coil 03. Each of these components can be operated individually or in any combination. Users who prefer direct cold air can select fan coil unit 01; users who do not prefer direct cold air can select radiator 02 or underfloor heating coil 03, or both radiator 02 and underfloor heating coil 03 can operate simultaneously.

[0055] It's worth noting that using radiators 02 and underfloor heating coils 03 for radiant cooling achieves a cool sensation without noticeable drafts, significantly enhancing user comfort. In particular, cooling via underfloor heating coils 03 not only provides even temperature distribution but also avoids the poor cooling effect caused by excessive distance in traditional airflow methods, resulting in a more even temperature drop throughout the space. Furthermore, this cooling method is quieter, producing no noticeable noise and creating a cool, comfortable, and tranquil indoor environment, achieving a gradual and subtle cooling experience.

[0056] In one embodiment of this utility model, the heat pump water heater unit further includes a controller, which is electrically connected to the main control valve and is used to control the opening and closing of the main control valve.

[0057] It should be noted that the controller can also control the opening of the main control valve to achieve dynamic regulation of the water flow at each indoor terminal, thereby achieving precise temperature control in each zone and improving the overall energy efficiency of the system.

[0058] Optionally, a main circuit temperature sensor is installed between the mixing valve and the indoor terminal, and the controller is electrically connected to the main circuit temperature sensor and the mixing valve respectively.

[0059] In this embodiment, as Figure 1As shown, the second and third water supply branch pipes are equipped with main line temperature sensors, namely the area two main line temperature sensor 24 and the area three main line temperature sensor 28, respectively. The area two main line temperature sensor 24 and the area three main line temperature sensor 28 are respectively installed on the second and third water supply branch pipes to monitor the water supply temperature after temperature adjustment by the corresponding mixing valve in real time.

[0060] The controller forms a closed-loop control system with the zone two mixing valve 22 and the zone two main circuit temperature sensor 24 via electrical connection. The controller acquires real-time measurement data from the zone two main circuit temperature sensor 24 and adjusts the supply and return water mixing ratio of the zone two mixing valve 22 based on the measurement data and the set value, so that the water supply temperature of the second indoor terminal is accurately at the set value. It should be noted that the water supply temperature adjustment principle of the third indoor terminal is the same as that of the second indoor terminal, and will not be described in detail here.

[0061] It should be noted that no mixing valve is installed on the first water supply branch pipe, so the water supply temperature at the end of the first indoor unit is the same as the outlet water temperature of the buffer water tank 15. Therefore, it is not necessary to install a main line temperature sensor on the first water supply branch pipe.

[0062] Furthermore, the buffer water tank 15 is equipped with a buffer water tank temperature sensor 17 to measure the water temperature inside the buffer water tank 15. This water temperature can be the outlet temperature of the buffer water tank 15, that is, the water supply temperature from the buffer water tank 15 to the indoor terminal.

[0063] In another embodiment of this utility model, an indoor terminal is electrically connected to a thermostat, which regulates the temperature of the indoor terminal. For example, the first indoor terminal is electrically connected to a zone one thermostat 29, the second indoor terminal is electrically connected to a zone two thermostat 30, and the third indoor terminal is equipped with a zone three thermostat 33.

[0064] In one embodiment of this utility model, such as Figure 1 As shown, there are multiple heating components, which are connected to corresponding water supply branch pipes through a diversion component. The diversion component is used to regulate the flow rate of the multiple heating components.

[0065] Optionally, the first indoor terminal includes multiple fan coil units 01, which are respectively connected to the first water supply branch pipe.

[0066] The second indoor terminal includes multiple radiators 02, which are connected to the second water supply branch pipe through a diversion component. The diversion component is used to adjust the flow rate of the multiple radiators 02 in order to adjust the temperature of the space corresponding to the multiple radiators 02.

[0067] The third indoor terminal includes multiple floor heating coils 03. The multiple floor heating coils 03 are connected to the third water supply branch pipe through a diversion component. The diversion component is used to adjust the flow rate of the multiple floor heating coils 03 in order to adjust the temperature of the space corresponding to the multiple floor heating coils 03.

[0068] Optionally, the diversion component includes a diversion pipe 08 and multiple branch control valves 07. The inlet end of the diversion pipe 08 is connected to the water supply branch pipe, and the outlet end of the diversion pipe 08 has multiple branch pipes. The multiple branch pipes are connected to multiple heating components one by one. The multiple branch control valves 07 are installed one by one on the multiple branch pipes. The flow rate of the branch pipes can be adjusted by the branch control valves 07, thereby adjusting the temperature of the multiple heating components to achieve differentiated temperature adjustment of the spaces corresponding to the multiple heating components.

[0069] Furthermore, the heating unit is equipped with a branch temperature sensor, and the controller is electrically connected to the branch temperature sensor and the branch control valve 07.

[0070] For example, the second indoor terminal includes multiple radiators 02, each radiator 02 is equipped with a zone two-branch temperature sensor 31. The controller forms a closed-loop control system with the branch control valve 07 and the zone two-branch temperature sensor 31 via electrical connection. The controller obtains the real-time measured temperature of the zone two-branch temperature sensor 31, and adjusts the opening of the branch control valve 07 based on the measured temperature and the set temperature value to make the measured temperature reach the set temperature value. Thus, by adjusting the opening of multiple branch control valves 07, the temperature of multiple radiators 02 is adjusted, thereby achieving different temperatures in the spaces corresponding to multiple radiators 02. It should be noted that each underfloor heating coil 03 in the third indoor terminal is equipped with a zone three-branch temperature sensor 32. The temperature adjustment method of the multiple underfloor heating coils 03 in the third indoor terminal is the same as the temperature adjustment method of the multiple radiators 02 in the second indoor terminal, and will not be described again here.

[0071] It should be noted that branch control valve 07 can also control the individual opening or closing of the corresponding heating element.

[0072] In this embodiment, the three indoor terminals correspond to Region 1, Region 2, and Region 3, respectively. The first indoor terminal includes three fan coil units 01, which are arranged in different spaces, such as three rooms. Thus, the three fan coil units 01 correspond to the three rooms in Region 1. The second indoor terminal includes three radiators 02, which correspond to the three rooms in Region 2. The third indoor terminal includes multiple underfloor heating coils 03, which correspond to the three rooms in Region 3.

[0073] It is understandable that the buffer tank 15 has a fixed temperature, so the temperature of Zone 1 corresponds to that of the buffer tank 15. Zones 2 and 3 have their own mixing valves, which can achieve different required temperatures.

[0074] For example, Zone 1, Zone 2, and Zone 3 can be set with different temperatures according to user preferences. For instance, Zone 1 uses fan coil unit 01 for cooling or heating, requiring a higher inlet water temperature for heating and a lower temperature for cooling; Zone 2 uses radiator 02 for heat dissipation, requiring a moderate heating and cooling temperature, with the heating inlet water temperature lower than the inlet water temperature of Zone 1 (temperature of buffer tank 15) and the cooling inlet water temperature higher than the inlet water temperature of Zone 1; Zone 3 uses underfloor heating, requiring only a lower water temperature for heating and a slightly higher inlet water temperature for cooling to achieve a comfortable cooling environment, thus requiring a lower heating inlet water temperature than the inlet water temperature of Zone 2 and a higher cooling inlet water temperature than the inlet water temperature of Zone 2.

[0075] The operating control principle of the heat pump water heater unit in this embodiment is as follows:

[0076] When operating in heating mode, the water in the buffer water tank 15 is heated by the main unit 1.

[0077] When fan coil unit 01 is selected for heating, the main control valve 18 of the control area is opened to heat the three rooms through the three fan coil units 01.

[0078] When radiator 02 is selected for heating, the main control valve 21 of zone two opens to heat three rooms through the three radiators 02. The three radiators 02 correspond to rooms 1, 2, and 3 respectively. The temperatures of the three rooms in zone two can be the same or different. When the temperatures are different, for example, room 1 is 25°C, room 2 is 35°C, and room 3 is 30°C, the opening of the branch control valve 07 corresponding to radiator 02 can be adjusted to achieve the desired temperature in the room corresponding to radiator 02.

[0079] When selecting underfloor heating coil 03 for heating, the main control valve 25 of zone three is opened to heat the three rooms through the three underfloor heating coils 03. The temperatures of the three rooms in zone three can be the same or different; the opening degree of the branch control valve 07 corresponding to underfloor heating coil 03 can be adjusted to adjust the temperature of the corresponding room to achieve the required temperature.

[0080] It should be noted that the operating principle of the cooling mode is the same as that of the heating mode (the difference lies in the outlet water temperature of the buffer water tank 15. When heating, high-temperature water, such as 35°C, is output; when cooling, low-temperature water, such as 10°C, is output). This utility model will not be described in detail here.

[0081] In one embodiment of this utility model, such as Figure 2As shown, the indoor end also includes a ceiling coil 04, which is installed at the top of the indoor space.

[0082] It should be noted that the ceiling heating coil 04 can adopt the same structure as the underfloor heating coil 03, and the ceiling heating coil 04 can also adopt a capillary network structure.

[0083] Understandably, in cooling mode, the ceiling coil 04 located at the top provides cooling, allowing the cold air to fall naturally, improving the user experience and enhancing the cooling effect.

[0084] Optionally, the underfloor heating coil 03 is installed at the bottom of the indoor space, and the ceiling coil 04 is installed at the top of the indoor space. When the main control valve of one of the ceiling coil 04 and the underfloor heating coil 03 is opened, the other corresponding main control valve of the ceiling coil 04 and the underfloor heating coil 03 is closed.

[0085] Understandably, the underfloor heating coil 03 is installed beneath the floor of the indoor space, typically laid within the floor structure layer, enabling heat exchange through the floor to achieve a uniform temperature distribution. The ceiling coil 04, on the other hand, is installed at the top of the indoor space, such as inside the ceiling or within the ceiling structure, primarily regulating indoor temperature through convection and radiation. During system operation, each circuit has a corresponding main control valve. When the main control valve of one circuit is open, the main control valve of the other circuit automatically closes, ensuring that they do not operate simultaneously. This design not only avoids mutual interference between the heat source and the cold source but also improves the system's energy efficiency and safety, making the switching between cooling and heating modes more flexible and reliable, meeting the needs of different seasons and usage scenarios.

[0086] Specifically, in heating mode, the main control valve corresponding to underfloor heating coil 03 is open, and the main control valve corresponding to ceiling coil 04 is closed; in cooling mode, the main control valve corresponding to underfloor heating coil 03 is closed, and the main control valve corresponding to ceiling coil 04 is open.

[0087] In one embodiment of this utility model, a heat-conducting layer is provided on the outer wall of the heating element.

[0088] It is understandable that a heat-conducting layer is installed on the outer wall of the radiator to enhance the heat transfer efficiency between the radiator surface and the surrounding air, so that heat can be transferred to the indoor environment more evenly and quickly.

[0089] A second aspect of this utility model provides an air heat pump system, such as... Figure 3 As shown, the heat pump system includes a main unit 1 and a heat pump water heater unit provided in any of the above embodiments.

[0090] In this embodiment, the main unit 1 is connected to the buffer water tank 15 through the pipeline system to form a heating circulation loop. The domestic hot water tank 9 is connected to the pipeline system through the three-way reversing valve 5. The three-way reversing valve 5 enables the connection between the buffer water tank 15 or the domestic hot water tank 9 and the main unit 1. When the domestic hot water tank 9 is connected to the main unit 1, the system can operate in hot water mode; when the buffer water tank 15 is connected to the main unit 1, the system can operate in heating mode or cooling mode.

[0091] Furthermore, the host 1 is connected to a wired controller 2, which is used for remote control and adjustment of system parameters, such as temperature and mode switching, to facilitate user operation.

[0092] The piping system includes an inlet pipe and an outlet pipe. The inlet pipe is connected between the outlet end of the main unit 1 and the buffer water tank 15, and the outlet pipe is connected between the inlet end of the main unit 1 and the buffer water tank 15. The inlet pipe is equipped with a water temperature sensor 16 to measure the water supply temperature.

[0093] The water inlet pipe is equipped with an external electric heater 3 as an auxiliary heating element to ensure the continuity and stability of hot water supply.

[0094] The water inlet pipe is connected to an expansion tank 4, which is used to stabilize the system pressure.

[0095] Optionally, the domestic hot water tank 9 is connected to a solar panel 7 for auxiliary heating, and the solar panel 7 is equipped with a solar panel water temperature sensor 6; the domestic hot water tank 9 is connected to a shower head 12, a check valve 13 is installed between the domestic hot water tank 9 and the shower head 12, and a hot water circuit temperature sensor 11 is installed on the pipeline between the domestic hot water tank 9 and the shower head 12.

[0096] The domestic hot water tank 9 is equipped with a domestic hot water tank temperature sensor 10 and a domestic hot water electric heater 8. The domestic hot water tank temperature sensor 10 measures the water temperature in the domestic hot water tank 9, and the domestic hot water electric heater 8 is used to heat the water in the domestic hot water tank 9.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat pump water heater unit, characterized in that, include: Buffer water tank; Multiple indoor terminals are provided, with their inlet terminals connected to the buffer water tank and their outlet terminals connected to the buffer water tank. A main control valve is provided between the inlet terminals of the indoor terminals and the buffer water tank. A mixing valve is provided between the inlet terminals of at least one indoor terminal and the buffer water tank, and the mixing valve is connected between the outlet terminal of the corresponding indoor terminal and the buffer water tank.

2. The heat pump water heater unit according to claim 1, characterized in that, The water inlets of the multiple indoor terminals are connected to the buffer water tank via water supply pipes; The inlet end of the water supply pipeline is connected to the buffer water tank, and the outlet end of the water supply pipeline has multiple water supply branch pipes. Each of the multiple water supply branch pipes is connected to the inlet end of each of the multiple indoor terminals. Each water supply branch pipe is equipped with the main control valve.

3. The heat pump water heater unit according to claim 2, characterized in that, It also includes a controller, and a main circuit temperature sensor is provided between the mixing valve and the indoor terminal. The controller is electrically connected to the main circuit temperature sensor and the mixing valve, respectively.

4. The heat pump water heater unit according to claim 3, characterized in that, The plurality of indoor terminals include fan coil units and heating components, wherein the heating components include radiators and / or underfloor heating coils; The mixing valve is provided between the heating element and the buffer water tank.

5. The heat pump water heater unit according to claim 4, characterized in that, The number of heating components is multiple, and the multiple heating components are connected to the corresponding water supply branch pipes through a diversion component. The diversion component is used to adjust the flow rate of the multiple heating components.

6. The heat pump water heater unit according to claim 5, characterized in that, The diversion component includes: The branch pipe has an inlet end connected to the water supply branch pipe and an outlet end with multiple branch pipes, each of which is connected to a corresponding heating component. Multiple branch control valves are provided, one-to-one with each of the multiple branch pipes.

7. The heat pump water heater unit according to claim 6, characterized in that, The heating element is equipped with a branch temperature sensor, and the controller is electrically connected to the branch temperature sensor and the branch control valve.

8. The heat pump water heater unit according to any one of claims 4 to 7, characterized in that, The indoor terminal also includes ceiling-mounted pipes.

9. The heat pump water heater unit according to any one of claims 4 to 7, characterized in that, The outer wall of the heating element is provided with a heat-conducting layer.

10. An air heat pump system, characterized in that, Including the heat pump water heater unit as described in any one of claims 1 to 9.

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