Wall-mounted fresh air heat pump structure

Abstract

The application relates to the technical field of heat exchange devices, in particular to a wall-mounted fresh air heat pump structure which comprises a main machine shell, a heat pump system, a fresh air system and a waterway system which are arranged in the main machine shell; the fresh air system is provided with multiple air inlets for introducing fresh air and discharging waste gas, a refrigerant circulating assembly of the heat pump system exchanges heat with an air source, the waterway system communicates with the heat pump system to transfer heat, and an air flow channel of the fresh air system passes through the refrigerant circulating assembly; the refrigerant circulating assembly, a four-way valve, components of the fresh air system and a filtering assembly are arranged. The application realizes wall-mounted installation, has the functions of fresh air introduction, waste gas discharge, heat exchange, refrigeration and heating mode conversion and air filtration, heat can be transferred outward through the waterway system, heating and hot water can be provided, and a comfortable air environment and suitable temperature can be provided for the indoor.

Description

Technical Field

[0001] This application relates to the technical field of heat exchange devices, and more particularly to a wall-mounted fresh air heat pump structure. Background Technology

[0002] Currently, in the residential and commercial HVAC sector, heating, cooling, hot water supply, and fresh air purification functions are typically achieved by multiple independent devices—air conditioning units are responsible for temperature regulation, independent fresh air units are responsible for ventilation, and water heaters are responsible for domestic hot water supply. This piecemeal approach not only occupies a large amount of indoor installation space, but also results in high overall energy consumption due to the independent operation of each system, making it difficult to form a unified indoor environmental control system.

[0003] Furthermore, independent fresh air systems in related technologies only possess basic ventilation functions. When introducing outdoor air into the room, they lack effective graded purification treatment, allowing particulate matter such as dust and pollen to easily enter the room directly. Simultaneously, the direct introduction of outdoor fresh air significantly increases the cooling and heating load of the air conditioning system, resulting in additional energy waste. In addition, existing heat pump products have exposed screws all around their casings, lacking aesthetic appeal and failing to meet the design requirements of modern home environments. Addressing these issues, how to integrate heating, cooling, hot water supply, and fresh air purification functions into a single device, achieving coordinated operation between systems, while simultaneously performing graded purification and energy recovery of the introduced fresh air, and improving the product's appearance quality, remains a pressing technical challenge. Summary of the Invention

[0004] In order to improve the problem that HVAC equipment cannot simultaneously provide multiple functions such as heating, cooling, hot water supply and fresh air purification, and that the independent operation of each system leads to high overall energy consumption, this application provides a wall-mounted fresh air heat pump structure.

[0005] This application provides a wall-mounted fresh air heat pump structure, which adopts the following technical solution:

[0006] A wall-mounted fresh air heat pump structure includes a main unit housing, and a heat pump system, a fresh air system, and a water system installed within the main unit housing. The fresh air system is provided with an indoor return air inlet, a fresh air inlet, an indoor supply air inlet, and an outdoor exhaust air inlet. The fresh air system is used to introduce outdoor fresh air into the main unit housing and exhaust indoor waste gas. The heat pump system is installed within the main unit housing and includes a refrigerant circulation component for exchanging heat with an air source. The water system is installed within the main unit housing and is connected to the heat pump system for transferring the heat generated by the heat pump system to the outside. The fresh air system is arranged adjacent to the heat pump system, and the airflow channel within the fresh air system passes through the refrigerant circulation component of the heat pump system.

[0007] By adopting the above technical solution, the heat pump system, fresh air system, and water system are integrated into the main unit casing, forming an integrated air conditioning and fresh air exchange device, realizing the miniaturization, modularization, and convenient installation of the equipment; the fresh air system can introduce outdoor fresh air into the main unit casing and exhaust indoor exhaust air, realizing indoor air renewal and replacement; the refrigerant circulation component of the heat pump system can exchange heat with the air source; the water system can transfer the heat generated by the heat pump system to the outside; the fresh air system is set adjacent to the heat pump system and the airflow channel passes through the refrigerant circulation component, so that the fresh air and the refrigerant exchange heat, effectively reducing the energy consumption of fresh air treatment.

[0008] Preferably, the refrigerant circulation assembly includes a compression unit, a first heat exchange unit, and a second heat exchange unit; the compression unit has an exhaust port and an exhaust port; the first heat exchange unit is disposed in the airflow channel of the fresh air system and is used to realize heat exchange between the refrigerant and the air source; the second heat exchange unit is disposed adjacent to the water system and is used to realize heat exchange between the refrigerant and the intermediate medium in the water system.

[0009] By adopting the above technical solution, it is clear that the refrigerant circulation component includes a compression unit, a first heat exchange unit, and a second heat exchange unit. The first heat exchange unit is set in the airflow channel of the fresh air system, which can realize the heat exchange between the refrigerant and the air source. The second heat exchange unit is set adjacent to the water system, which can realize the heat exchange between the refrigerant and the intermediate medium in the water system. This improves the heat exchange path of the heat pump system, enabling the equipment to more effectively utilize the air source for heat exchange and transfer the heat to the water system, thus meeting the needs of heating and hot water supply.

[0010] Preferably, the compression unit is connected to the first heat exchange unit and the second heat exchange unit via a four-way valve; the four-way valve has one inlet and three outlets, the exhaust port of the compression unit is connected to the inlet of the four-way valve, and the three outlets of the four-way valve are respectively connected to the return port of the compression unit, the first heat exchange unit and the second heat exchange unit. The four-way valve is used to switch the flow direction of the refrigerant to realize the conversion between heating mode and cooling mode.

[0011] By adopting the above technical solution, the heat pump system, fresh air system and water system are integrated in the main unit casing to achieve equipment miniaturization, modularization and convenient installation. The fresh air system is adjacent to the heat pump system and the airflow channel passes through the refrigerant circulation component, which can reduce the energy consumption of fresh air treatment. On this basis, the compression unit is connected to the first and second heat exchange units through a four-way valve. The four-way valve can switch the refrigerant flow direction to realize the conversion between heating and cooling modes, so that the equipment has the triple functions of heating, cooling and fresh air exchange.

[0012] Preferably, the fresh air system includes a partition component, an indoor air supply component, and an outdoor air supply component installed inside the main unit housing; the partition component is assembled on the top of the main unit housing and divides into a mixing chamber, an air supply chamber, and an exhaust chamber; one end of the mixing chamber is connected to an outdoor fresh air inlet and an indoor return air inlet, and the other end is connected to the air supply chamber and the exhaust chamber, respectively; the air supply chamber is connected to an indoor air supply outlet; the exhaust chamber is connected to an outdoor exhaust outlet; the indoor air supply component is located inside the air supply chamber and is used to deliver the mixed air to the room; the outdoor air supply component is located inside the exhaust chamber and is used to send the excess air to the outside.

[0013] By adopting the above technical solutions, multiple systems are integrated into the main unit housing to achieve miniaturization, modularization, and convenient installation; the partition component divides multiple chambers to reduce space, prevent mixed air leakage, and ensure the independence of air supply and exhaust; after outdoor fresh air and indoor return air are mixed in the mixing chamber, the mixed air is sent into the room through the indoor air supply component, and the outdoor air supply component exhausts indoor exhaust air to the outside, realizing indoor air renewal and replacement; the airflow channel of the fresh air system passes through the refrigerant circulation component of the heat pump system, so that the fresh air and the refrigerant exchange heat, reducing the energy consumption of fresh air treatment.

[0014] Preferably, the fresh air system further includes a fresh air temperature control component, which is installed inside the air supply cavity and connected to the heat pump system for pre-cooling or preheating the outdoor fresh air.

[0015] By adopting the above technical solution, the heat pump system, fresh air system, and water system are integrated into the main unit casing, achieving miniaturization, modularization, and convenient installation of the equipment. The fresh air system is equipped with an indoor return air inlet, a fresh air inlet, an indoor supply air outlet, and an outdoor exhaust air outlet, which can introduce outdoor fresh air into the main unit casing and exhaust indoor waste gas. Moreover, the airflow channel passes through the refrigerant circulation component of the heat pump system, allowing the fresh air to exchange heat with the refrigerant, effectively reducing the energy consumption of fresh air treatment. On this basis, a fresh air temperature control component connected to the heat pump system is installed in the air supply cavity, which can further pre-cool or preheat the outdoor fresh air, improving indoor comfort.

[0016] Preferably, the fresh air system further includes at least two sets of filter components, with at least one set of filter components installed on the airflow path between the indoor return air vent and the mixing chamber, and between the fresh air inlet and the mixing chamber; and at least one set of filter components installed on the airflow path between the mixing chamber and the indoor supply air vent.

[0017] By adopting the above technical solution, the heat pump system, fresh air system, and water system are integrated into the main unit casing, achieving miniaturization, modularization, and convenient installation of the equipment. The fresh air system is equipped with an indoor return air inlet, a fresh air inlet, an indoor supply air outlet, and an outdoor exhaust air outlet, which can introduce outdoor fresh air into the main unit casing and exhaust indoor waste gas. The refrigerant circulation component of the heat pump system can exchange heat with the air source, and the water system can transfer the heat generated by the heat pump system to the outside. The fresh air system is adjacent to the heat pump system, and the airflow channel passes through the refrigerant circulation component, which can enable the fresh air to exchange heat with the refrigerant and reduce the energy consumption of fresh air treatment. At least two sets of filter components are installed on the airflow paths between the indoor return air inlet and the mixing chamber, between the fresh air inlet and the mixing chamber, and between the mixing chamber and the indoor supply air outlet, which can filter the introduced air, remove impurities and particulate matter, and improve the quality of the indoor air.

[0018] Preferably, each group of filter components includes a pre-filter unit and a medium-efficiency filter unit. The pre-filter unit is installed at the indoor return air vent and fresh air inlet or at the indoor supply air vent. The medium-efficiency filter unit is installed on the side of the pre-filter unit closer to the heat pump system. The pre-filter unit is used to intercept large-diameter particles, and the medium-efficiency filter unit is used to intercept small-diameter particles.

[0019] By adopting the above technical solutions, the heat pump system, fresh air system, and water system are integrated into the main unit housing, achieving equipment miniaturization, modularization, and convenient installation. The fresh air system uses a partition component to separate the mixing chamber, supply air chamber, and exhaust air chamber to achieve indoor air renewal and replacement, and the airflow channel passes through the heat pump system's refrigerant circulation component to achieve heat exchange. The fresh air system is equipped with a fresh air temperature control component to pre-cool or preheat the outdoor fresh air, improving indoor comfort. On this basis, the primary filter unit of the filter component can intercept large-diameter particles, and the medium-efficiency filter unit can intercept small-diameter particles, performing graded purification of the introduced fresh air and indoor return air to reduce the entry of dust, pollen, and other particulate matter into the room.

[0020] Preferably, the fresh air system further includes a return air regulating component, which is disposed between the indoor space and the mixing chamber to regulate the air volume of the indoor return air; a backflow preventer is provided on the airflow path between the fresh air inlet and the indoor air outlet to prevent the airflow from flowing in the opposite direction.

[0021] By adopting the above technical solutions, a heat pump system, a fresh air system, and a water system are integrated into the main unit casing to achieve equipment miniaturization, modularization, and convenient installation. The airflow channel of the fresh air system reduces the energy consumption of fresh air treatment through the refrigerant circulation component of the heat pump system. On this basis, the return air regulating component can adjust the air volume of indoor return air, which can better control the return air volume entering the mixing chamber and optimize the mixing ratio of indoor and outdoor air. The anti-reverse component can prevent airflow from flowing in reverse, ensure that the airflow in the fresh air system flows in a predetermined direction, maintain stable airflow pressure inside the equipment, and ensure the continuous and smooth operation of the entire fresh air exchange process.

[0022] Preferably, the main unit housing includes multiple panels, and the connection between adjacent panels is achieved by the cooperation of fasteners and magnetic components, and the fasteners are concealed and installed on the inner side of the panels.

[0023] By adopting the above technical solution, the equipment integrates the heat pump system, fresh air system, and water system within the main unit casing, achieving miniaturization, modularization, and convenient installation. Meanwhile, adjacent panels are connected via fasteners and magnetic components, with the fasteners concealed inside the panels. Magnetic adsorption allows for pre-positioning of the panels, facilitating subsequent alignment and tightening of the fasteners. After installation, the magnetic adsorption also fills gaps, improving panel connection tightness. Furthermore, the concealed fasteners are not exposed on the main unit casing surface, ensuring the flatness of the casing's outer surface and preventing long-term exposure and corrosion that could affect panel connection stability.

[0024] Preferably, the water system includes a water pump and a hot water tank; the inlet of the water pump is connected to the outlet of the hot water tank, the outlet of the water pump is connected to the first heat exchange unit of the heat pump system, and the inlet of the hot water tank is connected to the first heat exchange unit, forming a water circulation loop; the hot water tank is provided with a heating water supply port and a heating water return port for connecting to an external heating terminal.

[0025] By adopting the above technical solution, the water pump drives the water in the hot water tank to circulate. The water absorbs the heat released by the refrigerant in the first heat exchange unit and then stores it in the hot water tank. The hot water tank is connected to the external heating terminal through the heating water supply port and the heating water return port, which can realize indoor heating and supply hot water at the same time.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By integrating the heat pump system, fresh air system, and water system into the main unit casing, this design addresses the issue that HVAC equipment cannot simultaneously provide multiple functions such as heating, cooling, hot water supply, and fresh air purification, and that the independent operation of each system leads to high overall energy consumption. It also improves upon the problem of multiple devices occupying significant indoor space, achieving equipment miniaturization and modularization for easier installation. Furthermore, the coordinated operation of each system reduces overall energy consumption.

[0028] 2. The airflow channel of the fresh air system passes through the refrigerant circulation component of the heat pump system, enabling the fresh air to exchange heat with the refrigerant, reducing the cooling and heating load of the air conditioning system, lowering the energy consumption of fresh air handling, and the fresh air temperature control component can pre-cool or preheat the outdoor fresh air, improving indoor comfort.

[0029] 3. The fresh air system is equipped with at least two sets of filter components, including a pre-filter and a medium-efficiency filter, which can perform graded purification of the introduced outdoor air, intercept large and small particles, and prevent dust, pollen, etc. from entering the room;

[0030] 4. The adjacent panels of the main unit housing are connected by fasteners and magnetic components. The fasteners are concealed, which not only ensures the flatness of the outer surface of the main unit housing, but also prevents the fasteners from being exposed and corroding, thereby improving the tightness of the panel connection and the appearance quality of the product.

[0031] 5. The compression unit is connected to the first and second heat exchange units through a four-way valve, which can switch the refrigerant flow direction to realize the conversion between heating and cooling modes, so that the equipment has the functions of heating, cooling and fresh air exchange. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of a wall-mounted fresh air heat pump structure disclosed in an embodiment of this application;

[0033] Figure 2 This is an isometric schematic diagram of a wall-mounted fresh air heat pump structure disclosed in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the compression unit in a wall-mounted fresh air heat pump structure disclosed in an embodiment of this application;

[0035] Figure 4 This is an exploded schematic diagram of a partial structure of a wall-mounted fresh air heat pump disclosed in an embodiment of this application;

[0036] Figure 5 This is a system schematic diagram of a wall-mounted fresh air heat pump structure disclosed in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Main unit casing; 11. Indoor return air vent; 12. Fresh air inlet; 13. Indoor supply air vent; 14. Outdoor exhaust air vent; 15. Mixing chamber; 16. Supply air chamber; 17. Exhaust air chamber; 18. Wall-mounted panel; 2. Heat pump system; 21. Compression unit; 210. Exhaust port; 211. Return air port; 212. Compressor; 213. Silencer cover; 22. First heat exchange unit; 23. Second heat exchange unit; 24. Four-way valve; 3. Fresh air system 31. Separation Components; 32. Indoor Air Supply Components; 33. Outdoor Air Supply Components; 34. Fresh Air Temperature Control Components; 35. Filter Components; 310. Return Air Regulator; 311. Anti-backflow Components; 4. Water System; 41. Heating Inlet; 42. Heating Outlet; 43. Water Inlet; 44. Hot Water Outlet; 45. Tap Water Inlet; 46. Water Pump; 47. Expansion Tank; 5. Control System; 51. Display Screen; 52. Electrical Control Components. Detailed Implementation

[0039] The present application will be further described in detail below with reference to the accompanying drawings.

[0040] This application discloses a wall-mounted fresh air heat pump structure. See also... Figure 1 The system includes a main unit housing 1, and a heat pump system 2, a fresh air system 3, a water system 4, and a control system 5 installed within the main unit housing 1. The fresh air system 3 has an indoor return air inlet 11, a fresh air inlet 12, an indoor supply air inlet 13, and an outdoor exhaust air inlet 14. These are arranged in a grid pattern on the main unit housing 1, and are located at the top of the main unit housing 1 vertically relative to the horizontal ground. The fresh air system 3 is used to introduce fresh outdoor air into the main unit housing 1 and exhaust indoor stale air. The heat pump system 2 is installed within the main unit housing 1 and includes a refrigerant circulation assembly for exchanging heat with the air source. The water system 4 is installed within the main unit housing 1 and is connected to the heat pump system 2, used to transfer the heat generated by the heat pump system 2 to the outside. The fresh air system 3 is arranged adjacent to the heat pump system 2, and the airflow channel within the fresh air system 3 passes through the refrigerant circulation assembly of the heat pump system 2.

[0041] In one embodiment, the main unit housing 1 includes multiple panels. Adjacent panels are connected using a combination of fasteners and magnetic components, with the fasteners concealed within the panels. In this embodiment, the fasteners can be bolts; in other embodiments, they can be self-tapping screws, clips, or other types of fasteners. The magnetic components are embedded within the panel's splicing edge, relying on magnetic attraction to pre-position the panel splicing area, facilitating subsequent alignment with mounting holes and fastening of the fasteners. After installation, the magnetic attraction also fills gaps in the splicing area, improving the tightness of the panel connection. The concealed fasteners are not exposed on the surface of the main unit housing 1, ensuring the flatness of the outer surface and preventing long-term exposure and corrosion that could affect the stability of the panel connection.

[0042] In one embodiment, the refrigerant circulation assembly includes a compression unit 21, a first heat exchange unit 22, and a second heat exchange unit 23. The compression unit 21 is provided with an exhaust port 210 and an exhaust port 211; the first heat exchange unit 22 is arranged in the airflow channel of the fresh air system 3 to realize heat exchange between the refrigerant and the air source. The second heat exchange unit 23 is arranged adjacent to the water system 4 to realize heat exchange between the refrigerant and the intermediate medium in the water system 4.

[0043] In one embodiment, the compression unit 21 is connected to the first heat exchange unit 22 and the second heat exchange unit 23 via a four-way valve 24. The four-way valve 24 has one inlet and three outlets. The exhaust port 210 of the compression unit 21 is connected to the inlet of the four-way valve 24, and the three outlets of the four-way valve 24 are respectively connected to the return port 211 of the compression unit 21, the first heat exchange unit 22, and the second heat exchange unit 23. The four-way valve 24 is used to switch the flow direction of the refrigerant to realize the conversion between heating mode and cooling mode.

[0044] In one embodiment, the compression unit 21 includes a compressor 212, an exhaust temperature sensor, a high-pressure switch, a high-pressure sensor, a return gas temperature sensor, a low-pressure switch, a low-pressure sensor, and a shut-off valve. The compressor 212 is fixedly mounted on the bottom of the main housing 1. The exhaust port 210 of the compressor 212 is connected to the inlet of the four-way valve 24 via a pipeline, and the return gas port 211 of the compressor 212 is connected to the first outlet of the four-way valve 24 via a pipeline. The exhaust temperature sensor, the high-pressure switch, and the high-pressure sensor are sequentially and alternately mounted on the pipeline between the exhaust port 210 of the compressor 212 and the inlet of the four-way valve 24. The return gas temperature sensor, the low-pressure switch, the low-pressure sensor, and the shut-off valve are sequentially and alternately mounted on the pipeline between the return gas port 211 of the compressor 212 and the first outlet of the four-way valve 24.

[0045] In one embodiment, the compressor 212 is covered with a noise muffler 213, which is fixed inside the main housing 1 and encloses the compressor 212 to absorb the noise generated by the operation of the compressor 212, thereby improving the user's comfort.

[0046] In other embodiments, the sound-absorbing cover 213 can also be a split structure, consisting of multiple pieces of sound-absorbing cotton spliced ​​together and wrapped around the outside of the compressor 212. The pieces of sound-absorbing cotton are fixed together by flame-retardant clips, which facilitates subsequent disassembly and maintenance of the compressor 212 and allows for adjustment of the fit according to the actual shape of the compressor 212, further improving the sound absorption and noise reduction effect. The inner layer of the sound-absorbing cover 213 can also be attached with a layer of sound-insulating damping felt, which can block the transmission of low- and mid-frequency noise and enhance the overall noise reduction effect.

[0047] In one embodiment, the first heat exchange unit 22 includes a plate heat exchanger, which is mounted on the inner bottom of the main housing 1 and located on one side of the compressor 212. The plate heat exchanger has a refrigerant inlet, a refrigerant outlet, a heat exchange side inlet, and a heat exchange side outlet. The refrigerant inlet of the plate heat exchanger is connected to the second outlet of the four-way valve 24, and the refrigerant outlet of the plate heat exchanger is connected to the second heat exchange unit 23 through an expansion valve. The heat exchange side of the plate heat exchanger is connected to the water system 4 for heat exchange between the refrigerant and the intermediate medium. In this embodiment, the plate heat exchanger is a brazed plate heat exchanger. In other embodiments, the plate heat exchanger may also be a high-efficiency tank evaporator or a shell-and-tube evaporator.

[0048] In one embodiment, the second heat exchange unit 23 includes an evaporator disposed within the airflow channel of the fresh air system 3 for heat exchange between the refrigerant and the air source. The refrigerant outlet of the evaporator is connected to the third outlet of the four-way valve 24. Simultaneously, the refrigerant outlet of the evaporator is also connected to the return air port 211 of the compressor 212 via the four-way valve 24, forming a complete refrigerant circulation loop. In this embodiment, the evaporator is a finned evaporator. In other embodiments, the evaporator may also be a microchannel evaporator or a tube-finned evaporator.

[0049] The refrigerant circulation assembly works as follows: In heating mode, compressor 212 compresses low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure refrigerant gas. This high-temperature, high-pressure refrigerant gas enters the plate heat exchanger via four-way valve 24. At this time, the plate heat exchanger acts as a condenser, releasing heat to the water system 4. After the refrigerant condenses into a liquid state, it is throttled and depressurized by the expansion valve, becoming a low-temperature, low-pressure gas-liquid two-phase mixture. It then enters the evaporator, where it absorbs heat from the air. After the refrigerant evaporates into a gaseous state, it returns to compressor 212 via four-way valve 24, completing one heating cycle. In cooling mode, four-way valve 24 switches the refrigerant flow direction. The high-temperature, high-pressure refrigerant gas enters the evaporator via four-way valve 24. At this time, the evaporator acts as a condenser, releasing heat to the air. After the refrigerant condenses into a liquid state, it is throttled and depressurized by the expansion valve, entering the plate heat exchanger. At this time, the plate heat exchanger acts as an evaporator, absorbing heat from the water system 4. After the refrigerant evaporates into a gaseous state, it returns to compressor 212 via four-way valve 24, completing one cooling cycle.

[0050] Specifically, the fresh air system 3 includes a partition assembly 31, an indoor air supply assembly 32, and an outdoor air supply assembly 33 installed inside the main unit housing 1. The partition assembly 31 is mounted on the top of the main unit housing 1 and divides the space into a mixing chamber 15, an air supply chamber 16, and an exhaust chamber 17. One end of the mixing chamber 15 is connected to the outdoor fresh air inlet and the indoor return air inlet 11, respectively, and the other end is connected to the air supply chamber 16 and the exhaust chamber 17, respectively. The air supply chamber 16 is connected to the indoor air supply outlet 13; the exhaust chamber 17 is connected to the outdoor exhaust outlet 14. The indoor air supply assembly 32 is located inside the air supply chamber 16 and is used to deliver the mixed air to the room. The outdoor air supply assembly 33 is located inside the exhaust chamber 17 and is used to deliver the excess air to the outside. In addition, each air chamber is connected to the installation space of the heat pump system 2, so that when the fresh air system 3 exhausts air, it can also simultaneously remove the heat generated by the compressor 212 in the heat pump system 2, extending its service life.

[0051] In one embodiment, the partition assembly 31 includes a cavity partition fixed inside the main unit housing 1 to divide the main unit housing 1 into multiple chambers. This design not only helps to reduce space but also prevents the mixed air in the mixing chamber 15 from leaking directly into the air supply channel, ensuring the independence of air supply and exhaust.

[0052] In one embodiment, the indoor air supply assembly 32 includes a fresh air fan, which is fixed inside the main unit housing 1 and located within the air supply cavity 16. The input end of the fresh air fan is connected to the air supply cavity 16, and the output end is connected to the indoor air outlet 13. During operation, the fresh air fan continuously draws in the mixed fresh air and return air from the mixing cavity 15, stabilizes and pressurizes the airflow, and then delivers it to the indoor space through the indoor air outlet 13, continuously replenishing the indoor air with fresh air and ensuring the freshness and oxygen content of the indoor air.

[0053] In one embodiment, the outdoor air supply assembly 33 includes an exhaust fan, which is fixed inside the main unit housing 1 and located within the exhaust cavity 17. The input end of the exhaust fan is connected to the exhaust cavity 17, and the output end is connected to the outdoor exhaust port 14. During operation, the exhaust fan draws in the stale air discharged from the room, pressurizes it stably, and then sends it to the outside through the outdoor exhaust port 14. A negative pressure environment is formed in the exhaust cavity 17, guiding the indoor return air to smoothly enter the equipment to complete the mixing and heat exchange, while maintaining stable airflow pressure inside the equipment, ensuring the continuous and smooth operation of the entire fresh air exchange process.

[0054] Furthermore, the fresh air system 3 also includes a fresh air temperature control component 34, which is installed in the air supply cavity 16 and is connected to the heat pump system 2 for pre-cooling or preheating the outdoor fresh air.

[0055] In one embodiment, the fresh air temperature control assembly 34 includes a surface cooler installed within the air supply cavity 16. The surface cooler is connected to the plate heat exchanger of the heat pump system 2 via a pipeline, and the cooling or heating generated by the plate heat exchanger is used to pre-cool or preheat the air flowing through the surface cooler.

[0056] In other embodiments, the surface cooler may also be connected to the plate heat exchanger via an intermediate medium circulation loop.

[0057] Furthermore, the fresh air system 3 also includes at least two sets of filter components 35. At least one set of filter components 35 is installed in the airflow path between the indoor return air inlet 11 and the mixing chamber 15, and between the fresh air inlet 12 and the mixing chamber 15. At least one set of filter components 35 is installed in the airflow path between the mixing chamber 15 and the indoor supply air inlet 13.

[0058] Each filter assembly 35 includes a pre-filter and a medium-efficiency filter. The pre-filter is installed on the side closest to the air outlet and is used to intercept large-diameter particles, such as dust, pollen, and flying insects. The medium-efficiency filter is installed on the side of the pre-filter closest to the heat pump system 2, that is, downstream of the pre-filter along the airflow direction, and is used to intercept small-diameter particles.

[0059] In one embodiment, the pre-filter unit uses a G5 pre-filter and the medium-efficiency filter unit uses an F9 medium-efficiency filter. In other embodiments, the filter assembly 35 may also use other combinations of levels, such as a combination of a G4 pre-filter and an F8 medium-efficiency filter, or an activated carbon filter layer or a HEPA high-efficiency filter layer may be added to the filter assembly 35.

[0060] In one embodiment, the filter assembly 35 installed in the air supply chamber 16 is located above the fresh air temperature control assembly 34. The filter assembly 35 installed in the mixing chamber 15 is located above the second heat exchange unit 23 and covers the indoor return air vent 11 and the fresh air inlet vent 12.

[0061] Furthermore, the fresh air system 3 also includes a return air regulating component 310, which is disposed between the indoor unit and the mixing chamber 15 to regulate the air volume of the indoor return air. At the same time, a backflow preventer 311 is provided on the airflow path between the fresh air inlet 12 and the indoor air outlet 13 to prevent the airflow from flowing in the opposite direction.

[0062] In one embodiment, the return air regulating component 310 includes a return air frame, multiple return air vanes, and a return air regulating motor. The return air frame is mounted on the frame of the filter assembly 35 and is positioned near the indoor return air inlet 11. The multiple return air vanes are spaced apart on the return air frame and are rotatably connected to it. Gears are fitted on the same rotating end of each return air vane, and the gears mesh with each other. The return air regulating motor is fixedly mounted on the return air frame, and one of the return air vanes is keyed to the output spindle of the return air regulating motor. When the return air regulating motor is running, it drives the multiple return air vanes to swing through gear linkage, thereby regulating the airflow rate entering the mixing chamber 15 from the indoor return air inlet 11.

[0063] In one embodiment, the structure of the anti-reverse component 311 is identical to that of the return air regulating component 310. The anti-reverse component 311 is mounted on the frame of the filter assembly 35 located in the air supply cavity 16, and adaptively adjusts the airflow according to the air supply volume of the indoor air supply assembly 32 to prevent the airflow from flowing in reverse.

[0064] The water system 4 includes a water pump 46 and a hot water tank. The inlet of the water pump 46 is connected to the outlet of the hot water tank, and the outlet of the water pump 46 is connected to the first heat exchange unit 22 of the heat pump system 2. The inlet of the hot water tank is connected to the first heat exchange unit 22, forming a water circulation loop. The hot water tank is equipped with a heating supply inlet and a heating return inlet for connecting to external heating terminals.

[0065] In one embodiment, the water system 4 further includes a heating coil, an expansion tank 47, an expansion vessel, a water flow sensor, inlet and outlet water temperature sensors, and piping components. The heating coil is installed inside the hot water tank to regulate the temperature of the hot water tank, as the water temperature after heat exchange in the first heat exchange unit 22 is insufficient to meet the demand for domestic hot water. The inlet of the water pump 46 is connected to the outlet of the hot water tank, and the outlet is connected to the heat exchange side inlet of the plate heat exchanger. The water pump 46 is used to drive the water to circulate in the water system 4. The heat exchange side outlet of the plate heat exchanger is connected to the inlet of the hot water tank, thus forming a water circulation loop. After absorbing the heat released by the refrigerant in the plate heat exchanger, the water flows into the hot water tank for storage under the drive of the water pump 46, and then connects to external heating terminals (such as underfloor heating coils or radiators) through the heating supply and return inlets of the hot water tank to achieve indoor heating. In addition, the hot water tank is equipped with a hot water outlet 44, a tap water inlet 45, and a water replenishment outlet 43. The hot water outlet 44 supplies domestic hot water, the tap water inlet 45 is used for backup and to replenish water to the hot water tank, and the water replenishment outlet 43 is used to replenish water to the water system 4.

[0066] In one embodiment, the expansion tank 47 and the expansion vessel are connected in the water system 4 to balance water pressure fluctuations in the water system 4. A water flow sensor and inlet / outlet water temperature sensors are respectively installed on the pipelines of the water system 4 to monitor water flow and supply / return water temperature, providing data support for the control system 5.

[0067] In one embodiment, the control system 5 includes an electronic control component 52 and a digital display screen 51. The electronic control component 52 is installed inside the main unit housing 1 and is electrically connected to the compressor 212, four-way valve 24, water pump 46, fresh air fan, exhaust fan, and various sensors, respectively, for coordinating and controlling the operation of the heat pump system 2, the fresh air system 3, and the water system 4. The electronic control component 52 supports independent settings and combined switching of multiple operating modes. Users can select a combination mode such as only fresh air mode, only heating mode, or simultaneous operation of fresh air and heating modes according to their needs. The digital display screen 51 is installed on the front panel of the main unit housing 1 and is used to display the system operating status and parameters.

[0068] In one embodiment, a wall-mounting plate 18 is provided on the back of the main unit housing 1 for suspending the entire unit against a wall. One horizontal edge of the wall-mounting plate 18 is fixedly connected to the upper part of the main body of the main unit housing 1, and the other end is snapped into a support bracket installed on the wall. Anti-slip and shock-absorbing pads are also provided at the contact point between the wall-mounting plate 18 and the support bracket, which can effectively buffer the vibration generated during equipment operation, reduce operating noise, and prevent the main unit housing 1 from sliding or shifting, thus improving the structural stability after installation. During installation, simply snapping the wall-mounting plate 18 on the main unit housing 1 into the support bracket on the wall completes the fixation, making disassembly and maintenance very convenient.

[0069] The working principle of a wall-mounted fresh air heat pump structure according to this application is as follows:

[0070] This wall-mounted fresh air heat pump integrates the heat pump system 2, fresh air system 3, water system 4, and control system 5 into a single main unit housing 1, forming a highly integrated air conditioning and fresh air exchange device. The heat pump system 2 achieves heat exchange through a refrigerant circulation assembly, which includes a compression unit 21, a first heat exchange unit 22, and a second heat exchange unit 23, connected by a four-way valve 24 to switch between heating and cooling modes. In heating mode, the compressor 212 compresses the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure gas, which enters the plate heat exchanger through the four-way valve 24, releases heat to the water system 4, condenses into a liquid, then passes through an expansion valve for throttling and pressure reduction, enters the evaporator to absorb heat from the air and evaporate into a gas, finally returning to the compressor 212 to complete the heating cycle. In cooling mode, the four-way valve 24 switches the refrigerant flow direction, allowing the evaporator to act as a condenser releasing heat to the air, and the plate heat exchanger to act as an evaporator absorbing heat from the water system 4, thus achieving a cooling cycle.

[0071] The fresh air system 3 is equipped with an indoor return air inlet 11, a fresh air inlet 12, an indoor supply air outlet 13, and an outdoor exhaust air outlet 14 arranged in a grid pattern on the top of the main unit housing 1. A partition component 31 divides the interior of the main unit housing 1 into a mixing chamber 15, a supply air chamber 16, and an exhaust air chamber 17. Outdoor fresh air and indoor return air mix in the mixing chamber 15. One path is pressurized and delivered into the room via the supply air chamber 16 by the indoor supply air component 32, while the other path is exhausted outdoors via the exhaust air chamber 17 by the outdoor supply air component 33, thus achieving indoor air renewal and replacement. The airflow channel of the fresh air system 3 passes through the refrigerant circulation component of the heat pump system 2, allowing heat exchange between the fresh air and the refrigerant. Simultaneously, the fresh air temperature control component 34 is connected to the heat pump system 2, enabling pre-cooling or preheating of the outdoor fresh air, further improving energy efficiency.

[0072] The water system 4 is driven by a water pump 46 to circulate water between the hot water tank and the plate heat exchanger. After absorbing heat released by the refrigerant in the plate heat exchanger, the water is stored in the hot water tank and then connected to the external heating terminals through the heating supply and return inlets, thus providing both indoor heating and hot water simultaneously. The control system 5 is electrically connected to all components and supports independent settings and combined switching of various operating modes.

[0073] This technology integrates the heat pump system 2, fresh air system 3, and water system 4 into a wall-mounted main unit housing 1, achieving miniaturization, modularization, and convenient installation of the equipment. The synergistic design of the fresh air system 3 and the heat pump system 2 allows the fresh air to exchange heat with the refrigerant before entering the room, effectively reducing the energy consumption of fresh air handling. At the same time, the fresh air temperature control component 34 further enhances indoor comfort. The introduction of the four-way valve 24 enables flexible switching between heating and cooling modes, giving the equipment three functions: heating, cooling, and fresh air exchange. The grid-shaped air outlet layout and wall-mounted installation design make the equipment compact, space-saving, and easy to disassemble and maintain.

[0074] This technical solution solves the problems of traditional fresh air system 3 and heat pump system 2 being set up independently, occupying a large space, being complicated to install and consuming a lot of energy; the problem that existing wall-mounted equipment has a single function and cannot simultaneously meet the needs of fresh air exchange and temperature regulation; and the problem that unreasonable airflow organization inside the equipment leads to low heat exchange efficiency and mutual interference between supply and exhaust air.

[0075] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 application, and should all be included within the protection scope of this application.

Claims

1. A wall-mounted fresh air heat pump structure, characterized in that: It includes a main unit housing (1), and a heat pump system (2), a fresh air system (3), and a water system (4) installed in the main unit housing (1); The fresh air system (3) is provided with an indoor return air inlet (11), a fresh air inlet (12), an indoor air supply outlet (13), and an outdoor exhaust outlet (14). The fresh air system (3) is used to introduce outdoor fresh air into the main unit housing (1) and exhaust indoor waste gas. The heat pump system (2) is installed inside the main unit housing (1). The heat pump system (2) includes a refrigerant circulation assembly, which is used to exchange heat with the air source. The water system (4) is installed inside the main unit housing (1). The water system (4) is connected to the heat pump system (2) and is used to transfer the heat generated by the heat pump system (2) to the outside. The fresh air system (3) is arranged adjacent to the heat pump system (2), and the airflow channel in the fresh air system (3) passes through the refrigerant circulation component of the heat pump system (2).

2. The wall-mounted fresh air heat pump structure according to claim 1, characterized in that: The refrigerant circulation assembly includes a compression unit (21), a first heat exchange unit (22), and a second heat exchange unit (23); The compression unit (21) has an exhaust port (210) and an air return port (211). The first heat exchange unit (22) is located in the airflow channel of the fresh air system (3) to realize heat exchange between the refrigerant and the air source. The second heat exchange unit (23) is arranged adjacent to the water system (4) to realize heat exchange between the refrigerant and the intermediate medium in the water system (4).

3. The wall-mounted fresh air heat pump structure according to claim 2, characterized in that: The compression unit (21) is connected to the first heat exchange unit (22) and the second heat exchange unit (23) via a four-way valve (24); The four-way valve (24) has one inlet and three outlets. The exhaust port (210) of the compression unit (21) is connected to the inlet of the four-way valve (24). The three outlets of the four-way valve (24) are respectively connected to the return port (211) of the compression unit (21), the first heat exchange unit (22) and the second heat exchange unit (23). The four-way valve (24) is used to switch the flow direction of the refrigerant to realize the conversion between heating mode and cooling mode.

4. The wall-mounted fresh air heat pump structure according to claim 1, characterized in that: The fresh air system (3) includes a partition component (31), an indoor air supply component (32), and an outdoor air supply component (33) installed in the main unit housing (1); The partition assembly (31) is mounted on the top of the main unit housing (1) and divides the mixing chamber (15), the air supply chamber (16), and the exhaust chamber (17). One end of the mixing chamber (15) is connected to the outdoor fresh air inlet and the indoor return air inlet (11), and the other end is connected to the air supply chamber (16) and the exhaust chamber (17). The air supply chamber (16) is connected to the indoor air supply outlet (13). The exhaust chamber (17) is connected to the outdoor exhaust outlet (14). The indoor air supply assembly (32) is located inside the air supply cavity (16) and is used to deliver the mixed air to the room; The outdoor air supply component (33) is located inside the exhaust cavity (17) and is used to send the residual air to the outside.

5. The wall-mounted fresh air heat pump structure according to claim 4, characterized in that: The fresh air system (3) also includes a fresh air temperature control component (34), which is installed in the air supply cavity (16) and is connected to the heat pump system (2) for pre-cooling or preheating the outdoor fresh air.

6. The wall-mounted fresh air heat pump structure according to claim 4, characterized in that: The fresh air system (3) also includes at least two sets of filter components (35), and at least one set of filter components (35) is provided on the airflow path between the indoor return air inlet (11) and the mixing chamber (15) and between the fresh air inlet (12) and the mixing chamber (15); At least one set of filter components (35) is provided on the airflow path between the mixing chamber (15) and the indoor air outlet (13).

7. The wall-mounted fresh air heat pump structure according to claim 6, characterized in that: Each of the filter components (35) includes a primary filter unit and a secondary filter unit. The primary filter unit is installed at the indoor return air inlet (11) and the fresh air inlet (12) or at the indoor supply air inlet (13). The secondary filter unit is installed on the side of the primary filter unit close to the heat pump system (2). The primary filter unit is used to intercept large-diameter particles, and the secondary filter unit is used to intercept small-diameter particles.

8. The wall-mounted fresh air heat pump structure according to claim 4, characterized in that: The fresh air system (3) also includes a return air regulating component (310), which is disposed between the room and the mixing chamber (15) and is used to regulate the air volume of the return air in the room; A backflow preventer (311) is provided on the airflow path between the fresh air inlet (12) and the indoor air outlet (13) to prevent airflow from flowing in the opposite direction.

9. The wall-mounted fresh air heat pump structure according to claim 1, characterized in that: The main unit housing (1) includes multiple panels. The connection between adjacent panels is achieved by fasteners and magnetic components, and the fasteners are concealed and installed on the inside of the panels.

10. The wall-mounted fresh air heat pump structure according to claim 1, characterized in that: The water system (4) includes a water pump (46) and a hot water tank; the inlet of the water pump (46) is connected to the outlet of the hot water tank, the outlet of the water pump (46) is connected to the first heat exchange unit (22) of the heat pump system (2), and the inlet of the hot water tank is connected to the first heat exchange unit (22), forming a water circulation loop; the hot water tank is provided with a heating water supply port and a heating water return port for connecting to an external heating terminal.

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