Fresh air conditioner

Abstract

The invention provides a fresh air conditioner. The fresh air conditioner comprises a shell (100), a first partition plate (830), a compressor assembly, a vibration reduction supporting assembly and a second partition plate (820). The shell (100) is provided with a mounting cavity, and a first air inlet (101), a second air inlet (104), a first air outlet (102) and a second air outlet (103) which are communicated with the mounting cavity; the first partition plate (830) is arranged in the mounting cavity and connected with the shell (100), one end of the first partition plate (830) is located between the first air inlet (101) and the first air outlet (102), and the other end of the first partition plate (830) is located between the second air outlet (103) and the second air inlet (104). The compressor assembly includes a compressor (500). The vibration reduction supporting assembly is arranged in the mounting cavity, and the compressor (500) is connected with the shell through the vibration reduction supporting assembly. The second partition plate (820) is arranged in the mounting cavity, and the second partition plate (820) is connected with the first partition plate (830) and the shell (100). The mounting cavity comprises a first sub-mounting cavity (1031) and a second sub-mounting cavity (1021); the first sub-mounting cavity (1031) is communicated with the second air outlet (103), and the second sub-mounting cavity (1021) is communicated with the first air outlet (102). The compressor assembly is disposed within the second sub-mounting cavity (1021).

Description

Fresh air air conditioner

[0001] This application claims priority to Chinese patent application No. 202310919765.4, filed on July 25, 2023, priority to Chinese patent application No. 202321971144.2, filed on July 25, 2023, priority to Chinese patent application No. 202321971240.7, filed on July 25, 2023; priority to Chinese patent application No. 202310919801.7, filed on July 25, 2023; and priority to Chinese patent application No. 202321971421.X, filed on July 25, 2023, and priority to Chinese patent application No. 202210465101.0, filed on April 29, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to a fresh air air conditioner. Background Art

[0003] Air conditioning has become a must-have appliance in every household. The air purification market has grown rapidly in recent years, and air conditioners used to regulate indoor air temperature and quality have also been continuously updated and improved. Compared to traditional air conditioners, fresh air air conditioners offer better air quality, combining air purification with dehumidification and humidification.

[0004] Summary of the Invention

[0005] In one aspect, a fresh air air conditioner is provided, comprising a housing, a first partition plate, a compressor assembly, a vibration-damping support assembly, and a second partition plate. The housing has an installation cavity and a first air inlet, a second air inlet, a first air outlet, and a second air outlet connected to the installation cavity. The first partition plate is disposed within the installation cavity and connected to the housing, with one end of the first partition plate located between the first air inlet and the first air outlet, and the other end of the first partition plate located between the second air outlet and the second air inlet. The compressor assembly comprises a compressor and a refrigerant pipe group connected to the compressor. The vibration-damping support assembly is disposed within the installation cavity, and the compressor is connected to the housing via the vibration-damping support assembly. The second partition plate is disposed within the installation cavity and is connected to the first partition plate and the housing, respectively. The installation cavity comprises a first sub-installation cavity and a second sub-installation cavity; the first sub-installation cavity is connected to the second air outlet, and the second sub-installation cavity is connected to the first air outlet. The compressor assembly is disposed in the second sub-installation cavity and is spaced apart from the second air outlet, so that a sound insulation cavity is formed between the second partition plate and the second air outlet.

[0006] In another aspect, a fresh air air conditioner is provided, comprising a housing and a heat exchange core. The housing has an installation cavity, comprising a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The first air inlet, the second air inlet, the first air outlet, and the second air outlet are respectively connected to the installation cavity. The installation cavity comprises a first sub-installation cavity, a second sub-installation cavity, a third sub-installation cavity, and a fourth sub-installation cavity. The first sub-installation cavity is connected to the second air outlet, the second sub-installation cavity is connected to the first air outlet, the third sub-installation cavity is connected to the first air inlet, and the fourth sub-installation cavity is connected to the second air inlet. The heat exchange core is disposed within the installation cavity and is located between the first and second air inlets. The housing comprises a first inspection port and a first inspection cover. The first inspection port is disposed below the heat exchange core and is connected to the third and fourth installation cavities. The first inspection cover cooperates with the first inspection port and is removably mounted over the first inspection port.

[0007] On the other hand, a fresh air air conditioner is provided, comprising a housing, a refrigerant pipeline, a heat exchanger group, an expansion valve group, a water receiving tray, a four-way valve, an ice melting unit, and a switch. The housing has an installation cavity; the compressor is disposed in the installation cavity; the refrigerant pipeline is disposed in the installation cavity, and the refrigerant pipeline includes a first refrigerant main line, a second refrigerant main line, a first refrigerant branch line, a second refrigerant branch line, a first refrigerant auxiliary line, and a second refrigerant auxiliary line. The heat exchanger group is disposed in the installation cavity, and the heat exchanger group includes a first heat exchanger, a second heat exchanger, and a third heat exchanger; the first heat exchanger and the second heat exchanger are disposed opposite each other along the length of the housing; the third heat exchanger is disposed side by side with the first heat exchanger and is located at one end of the air outlet of the first heat exchanger; the second heat exchanger is connected to the third heat exchanger via the first refrigerant branch line; and the third heat exchanger is connected to the second refrigerant branch line via the first refrigerant auxiliary line. The expansion valve group includes a first expansion valve and a second expansion valve. The first expansion valve is disposed in the first refrigerant branch, and the second expansion valve is disposed in the second refrigerant auxiliary circuit. The water collection pan is disposed below the heat exchanger group and is configured to collect condensed water generated by the heat exchanger group. The four-way valve is configured to switch the fresh air air conditioner between cooling mode, heating mode, and non-cooling dehumidification mode by changing the flow direction of the refrigerant within the refrigerant pipeline. The ice melting unit is disposed below the second heat exchanger, with at least a portion of the ice melting unit located within the water collection pan. The ice melting unit is connected to the second heat exchanger via the second refrigerant branch, and the ice melting unit is connected to the first heat exchanger via the second refrigerant auxiliary circuit. The switch is configured to control the on / off state of the second refrigerant branch and the flow direction of the refrigerant within the second refrigerant branch.

[0008] In another aspect, a fresh air air conditioner is provided, comprising a housing, refrigerant piping, a heat exchanger assembly, an expansion valve, a water receiving tray, a four-way valve, and a controller. The housing has a mounting cavity; the compressor is disposed within the mounting cavity; the refrigerant piping is disposed within the mounting cavity, and the refrigerant piping includes a first main refrigerant circuit, a second main refrigerant circuit, a first branch refrigerant circuit, a second branch refrigerant circuit, a third branch refrigerant circuit, a first auxiliary refrigerant circuit, a second auxiliary refrigerant circuit, and a third auxiliary refrigerant circuit. The heat exchanger group is disposed within the mounting cavity and includes a first heat exchanger, a second heat exchanger, and a third heat exchanger. The first and second heat exchangers are disposed opposite each other along the length of the housing. The third heat exchanger is disposed side by side with the first heat exchanger and is located at one end of the first heat exchanger where air flows out. The second heat exchanger is connected to the third heat exchanger via the first refrigerant branch line. The second heat exchanger is connected to the first heat exchanger via the second refrigerant branch line, and the third heat exchanger is connected to the first heat exchanger via the first refrigerant auxiliary line. The expansion valve includes a first expansion valve, a second expansion valve, and a third expansion valve. The first expansion valve is disposed in the first refrigerant branch line, the second expansion valve is disposed in the second refrigerant branch line, and the third expansion valve is disposed in the first refrigerant auxiliary line. The controller is configured to: if it is determined that the difference between the actual indoor humidity and the target humidity is greater than a preset humidity difference, control the fresh air air conditioner to operate in a dehumidification mode; if it is determined that the difference between the actual indoor humidity and the target humidity is less than or equal to the preset humidity difference, determine the relationship between the difference between the actual indoor temperature and the target indoor temperature and the preset humidity difference; if it is determined that the difference between the actual indoor temperature and the target indoor temperature is greater than the preset humidity difference, control the fresh air air conditioner to operate in a cooling mode; if it is determined that the difference between the actual indoor temperature and the target indoor temperature is less than or equal to the preset humidity difference, continue to determine the relationship between the difference between the actual indoor temperature and the target indoor temperature and a fourth preset temperature difference; if it is determined that the difference between the actual indoor temperature and the target indoor temperature is less than the fourth preset temperature difference, control the fresh air air conditioner to operate in a heating mode.

[0009] On the other hand, a fresh air air conditioner is provided, comprising a housing, an indoor gas detection component, an outdoor gas detection component, and an electrical control box. The housing has an installation cavity. The indoor gas detection component is disposed in the installation cavity and is configured to detect gas parameters of indoor return air. The indoor gas detection component includes a first power supply terminal, a first signal receiving terminal, and a first signal transmitting terminal; the indoor gas detection component includes a first communication address. The outdoor gas detection component is disposed in the installation cavity and is configured to detect gas parameters of outdoor fresh air. The outdoor gas detection component includes a second power supply terminal, a second signal receiving terminal, and a second signal transmitting terminal; the outdoor gas detection component includes a second communication address. The electrical control box is disposed in the installation cavity and comprises a main control board; the main control board comprises an MCU, a first power output circuit, a second power output circuit, a sensor receiving circuit, and a sensor transmitting circuit. The first power output circuit and the second power output circuit are respectively connected to the MCU, and the output terminal of the first power output circuit is connected to the first power supply terminal, and the output terminal of the second power output circuit is connected to the second power supply terminal. The MCU includes a signal receiving port and a signal sending port, the signal sending port is connected to the first signal receiving end and the second signal receiving end respectively through the sensor receiving circuit, and the first signal sending end and the second signal sending end are connected to the signal receiving end respectively through the sensor sending circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a structural diagram of a fresh air air conditioner in the related art;

[0011] FIG2 is a structural diagram of a fresh air air conditioner according to some embodiments;

[0012] FIG3 is another structural diagram of a fresh air air conditioner according to some embodiments;

[0013] FIG4 is another structural diagram of a fresh air air conditioner according to some embodiments;

[0014] FIG5 is a structural diagram of a cover according to some embodiments;

[0015] FIG6 is an exploded view of a cover body and a noise reduction portion according to some embodiments;

[0016] FIG7 is an exploded view of a vibration damping support assembly according to some embodiments;

[0017] FIG8 is a structural diagram of a first supporting portion according to some embodiments;

[0018] FIG9 is a partial structural diagram of a fresh air air conditioner according to some embodiments;

[0019] FIG10 is an installation diagram of a heat exchanger assembly and a water tray according to some embodiments;

[0020] FIG11A is another partial structural diagram of a fresh air air conditioner according to some embodiments;

[0021] FIG11B is another partial structural diagram of a fresh air air conditioner according to some embodiments;

[0022] FIG12 is a structural diagram of a water receiving tray according to some embodiments;

[0023] FIG13 is another partial structural diagram of a fresh air air conditioner according to some embodiments;

[0024] FIG14 is an installation diagram of a refrigerant pipe group of a compressor assembly according to some embodiments;

[0025] FIG15 is a partial enlarged view of the compressor assembly in FIG14;

[0026] FIG16 is a structural diagram of a first heat exchanger, a second heat exchanger, and a third heat exchanger according to some embodiments;

[0027] FIG17 is an exploded view of a first connecting portion, a second connecting portion, and a first fixing portion according to some embodiments;

[0028] FIG18 is another partial structural diagram of a fresh air air conditioner according to some embodiments;

[0029] FIG19 is an exploded view of an access panel according to some embodiments;

[0030] FIG20 is a diagram illustrating the installation of a heat exchange core according to some embodiments;

[0031] FIG21A is a structural diagram of a first partition plate according to some embodiments;

[0032] FIG21B is another structural diagram of a first partition plate according to some embodiments;

[0033] FIG21C is another structural diagram of a first partition plate according to some embodiments;

[0034] FIG22 is an exploded view of a first abutment portion according to some embodiments;

[0035] FIG23 is an exploded view of a second abutment portion according to some embodiments;

[0036] FIG24A is a block diagram of a first access opening according to some embodiments;

[0037] FIG24B is a block diagram of a first access cover according to some embodiments;

[0038] FIG25 is another partial structural diagram of a fresh air air conditioner according to some embodiments;

[0039] FIG26 is a structural diagram of a bridge assembly according to some embodiments;

[0040] FIG27 is an exploded view of a bridge assembly according to some embodiments;

[0041] FIG28 is an exploded view of a housing, an eighth support portion, and a ninth support portion according to some embodiments;

[0042] FIG29 is an exploded view of a blocking portion and a ninth supporting portion according to some embodiments;

[0043] FIG30 is a structural diagram of a ninth supporting portion according to some embodiments;

[0044] FIG31 is a structural diagram of another ninth supporting portion according to some embodiments;

[0045] FIG32 is a structural diagram of a blocking portion according to some embodiments;

[0046] FIG33 is an exploded view of a foam member, a wire-passing portion, and a housing according to some embodiments;

[0047] FIG34 is a structural diagram of a wire-passing portion according to some embodiments;

[0048] FIG35 is a planar structural diagram of a fresh air air conditioner according to some embodiments;

[0049] FIG36 is a cross-sectional view taken along line HH in FIG35;

[0050] FIG37 is a partial enlarged view of the circle Z in FIG36;

[0051] FIG38 is a structural diagram of another fresh air air conditioner according to some embodiments;

[0052] FIG39 is a schematic diagram of refrigerant flow in another fresh air air conditioner operating in a heating mode according to some embodiments;

[0053] FIG40 is a schematic diagram of refrigerant circulation in another fresh air air conditioner operating in cooling mode according to some embodiments;

[0054] FIG41 is a schematic diagram of refrigerant flow in another fresh air air conditioner operating in a dehumidification mode according to some embodiments;

[0055] FIG42 is a structural diagram of yet another fresh air air conditioner according to some embodiments;

[0056] FIG43 is a flow chart of a control method for a fresh air air conditioner according to some embodiments;

[0057] FIG44 is a schematic diagram of refrigerant flow in yet another fresh air air conditioner operating in a dehumidification mode according to some embodiments;

[0058] FIG45 is a flow chart of another control method of a fresh air air conditioner according to some embodiments;

[0059] FIG46 is a schematic diagram of refrigerant flow in yet another fresh air air conditioner operating in cooling mode according to some embodiments;

[0060] FIG47 is a flowchart of yet another method for controlling a fresh air air conditioner according to some embodiments;

[0061] FIG48 is a schematic diagram of refrigerant flow in yet another fresh air air conditioner operating in a heating mode according to some embodiments;

[0062] FIG49 is a structural diagram of yet another fresh air air conditioner according to some embodiments;

[0063] FIG50 is a partial enlarged view of the circle Y in FIG49;

[0064] FIG51 is another structural diagram of yet another fresh air air conditioner according to some embodiments;

[0065] FIG52 is a partial structural diagram of yet another fresh air air conditioner according to some embodiments;

[0066] FIG53 is a structural diagram of a first mounting portion according to some embodiments;

[0067] FIG54 is another structural diagram of the first mounting portion according to some embodiments;

[0068] FIG55 is a structural diagram of a main control board of a fresh air air conditioner according to some embodiments;

[0069] FIG56 is a diagram illustrating connections between a main control board, an indoor gas detection component, and an outdoor gas detection component of a fresh air air conditioner according to some embodiments;

[0070] FIG57 is a circuit diagram of a first power output circuit of a fresh air air conditioner according to some embodiments;

[0071] FIG58 is a circuit diagram of a second power output circuit of a fresh air air conditioner according to some embodiments;

[0072] FIG59 is a circuit diagram of a sensor receiving circuit of a fresh air air conditioner according to some embodiments;

[0073] FIG60 is a circuit diagram of a sensor transmitting circuit of a fresh air air conditioner according to some embodiments. DETAILED DESCRIPTION

[0074] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0075] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0076] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0077] As shown in FIG. 1 , in some embodiments, the fresh air air conditioner 1A includes an outdoor unit, an indoor unit, and a refrigerant pipeline.

[0078] The outdoor unit of fresh air air conditioner 1A (shown as the outdoor side in FIG1 ) includes a compressor 500A and a second heat exchanger 400A, while the indoor unit of fresh air air conditioner 1A (shown as the indoor side in FIG1 ) includes a first heat exchanger 300A. The refrigerant piping, also known as the circulation piping, connects the indoor and outdoor units to form a refrigerant circulation loop.

[0079] In some embodiments, the fresh air air conditioner 1A further includes an expansion valve, which may be disposed in at least one of the indoor unit or the outdoor unit.

[0080] The refrigerant cycle of fresh air air conditioner 1A is implemented by compressor 500A, condenser (first heat exchanger 300A or second heat exchanger 400A), expansion valve, and evaporator (second heat exchanger 400A or first heat exchanger 300A). The refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned cycle.

[0081] When fresh air air conditioner 1A operates in heating mode, the low-temperature, low-pressure gas-phase refrigerant is compressed by compressor 500A into a high-temperature, high-pressure gas-phase refrigerant. This high-temperature, high-pressure gas-phase refrigerant then flows into first heat exchanger 300A. First heat exchanger 300A condenses the high-temperature, high-pressure gas-phase refrigerant into a high-pressure liquid-phase refrigerant. Heat is released into the surrounding environment during the condensation process, thereby increasing the indoor air temperature. The expansion valve throttles and reduces the pressure of the high-pressure liquid-phase refrigerant, converting it into a low-pressure gas-liquid two-phase refrigerant. Second heat exchanger 400A evaporates this low-pressure gas-liquid two-phase refrigerant to form a low-temperature, low-pressure gas-phase refrigerant. This low-pressure, low-pressure gas-phase refrigerant then returns to compressor 500A, completing the heating cycle.

[0082] When fresh air air conditioner 1A operates in cooling mode, the high-temperature, high-pressure gaseous refrigerant discharged from compressor 500A flows into second heat exchanger 400A. Second heat exchanger 400A condenses the high-temperature, high-pressure gaseous refrigerant into a medium-temperature, high-pressure, subcooled liquid refrigerant. The expansion valve throttles and reduces the pressure of the medium-temperature, high-pressure, subcooled liquid refrigerant into a low-temperature, low-pressure gas-liquid two-phase refrigerant. The first heat exchanger 300A evaporates the low-temperature, low-pressure gas-liquid two-phase refrigerant to form a low-temperature, low-pressure gaseous refrigerant. The evaporation process absorbs heat from the surrounding environment, lowering the indoor air temperature. The low-temperature, low-pressure gaseous refrigerant returns to compressor 500A, completing the refrigeration cycle.

[0083] During the operation of the fresh air air conditioner 1A, the compressor 500A will generate noise due to vibration when providing power to the fresh air air conditioner 1A, and there is no barrier between the compressor 500A and the indoor side of the fresh air air conditioner 1A. This will cause the noise of the compressor 500A to be transmitted into the room, causing noise pollution and affecting the quality of life of the user.

[0084] In addition, the refrigerant pipeline runs through the indoor and outdoor sides of the fresh air air conditioner 1A, causing the airflow between the indoor and outdoor sides to circulate with each other, resulting in poor connection sealing, reducing the heat exchange effect of the fresh air air conditioner 1A, and affecting the sound insulation effect.

[0085] In order to solve the above problems, the present disclosure provides a fresh air air conditioner 1. As shown in FIG. 2 , FIG. 3 and FIG. 4 , the fresh air air conditioner 1 includes a housing 100 and a compressor assembly.

[0086] The housing 100 includes a first plate 110 (e.g., an upper cover plate), a second plate 130 (e.g., a lower cover plate), and a third plate 120 (e.g., a side plate). The third plate 120 is located between the first plate 110 and the second plate 130 and is connected to the first plate 110 and the second plate 130, respectively. The first plate 110, the second plate 130, and the third plate 120 enclose a mounting cavity, and the compressor 500 is disposed within the mounting cavity.

[0087] The first plate 110 is configured to be connected to the roof of a building so that the fresh air air conditioner 1 is hung as a whole in the building. The second plate 130 is located on the side of the fresh air air conditioner 1 away from the roof of the building, and the housing 100 includes a first inspection port 131 (as shown in FIG19 ) to facilitate the inspection of the interior of the fresh air air conditioner 1. The portion of the third plate 120 located in the outdoor unit includes a first air inlet 101 and a first air outlet 102, and the portion of the third plate 120 located in the indoor unit includes a second air outlet 103 and a second air inlet 104. The dotted arrows in FIG2 are the flow directions of the airflow. As shown by the dotted arrows in FIG2 , an air inlet channel is formed between the first air inlet 101 and the second air outlet 103, and an air outlet channel is formed between the second air inlet 104 and the first air outlet 102.

[0088] In some embodiments, as shown in FIG. 4 , the compressor assembly includes a compressor 500 and a refrigerant pipe group. The refrigerant pipe group is connected to the compressor 500 , and the refrigerant pipe group includes a plurality of refrigerant pipelines.

[0089] 2 and 3 , the fresh air air conditioner 1 further includes a first partition plate 830 and a second partition plate 820. The first partition plate 830 and the second partition plate 820 are disposed in the installation cavity.

[0090] The first partition plate 830 extends along the length direction of the shell 100 (such as direction A in Figure 3), and both ends of the first partition plate 830 extend to the indoor unit and the outdoor unit of the installation cavity. One end of the first partition plate 830 is connected between the first air inlet 101 and the first air outlet 102, and the other end is connected between the second air outlet 103 and the second air inlet 104 to achieve partitioning of the installation cavity.

[0091] As shown in Figures 3 and 4, the second partition plate 820 is arranged between the compressor 500 and the second exhaust port 103. In some embodiments, the second partition plate 820 includes a first end 821 (i.e., one end) and a second end 822 (i.e., the other end). The first end 821 is fixedly connected to one side of the first partition plate 830, and the second end 822 extends along the width direction of the shell 100 (such as direction B in Figure 3) and is connected to the third plate 120 to achieve partitioning of the installation cavity.

[0092] In some embodiments, as shown in Figure 3, the first partition plate 830, the second partition plate 820 and the shell 100 divide the installation cavity into a first sub-installation cavity 1031 and a second sub-installation cavity 1021; the first sub-installation cavity 1031 is connected to the second exhaust port 103, and the second sub-installation cavity 1021 is connected to the first exhaust port 102.

[0093] The second air outlet 103 is disposed on a side of the third plate 120 located within the first sub-mounting cavity 1031, away from the second partition plate 820. The compressor assembly is disposed within the second sub-mounting cavity 1021. Thus, the second partition plate 820 separates the compressor assembly from the second air outlet 103, forming a soundproof cavity between the second partition plate 820 and the second air outlet 103. This isolates the noise generated by the compressor assembly during operation and reduces the noise that enters the room from the second air outlet 103, thereby minimizing the impact on the user's quality of life.

[0094] In addition, in the compressor assembly, the refrigerant pipe group connected to the compressor 500 is centrally arranged in the second sub-installation cavity 1021, avoiding the problem of poor sealing of the circumferential side of the refrigerant pipe group caused by the refrigerant pipe in the refrigerant pipe group passing through the second partition plate 820. In addition, the second partition plate 820 separates the first sub-installation cavity 1031 and the second sub-installation cavity 1021, avoiding the air flow between the second sub-installation cavity 1021 and the first sub-installation cavity 1031, thereby ensuring the heat exchange effect of the fresh air air conditioner 1.

[0095] In some embodiments, the fresh air air conditioner 1 further includes a first buffer portion 823 disposed within the mounting cavity. The second end 822 of the second partition plate 820 is flexibly connected to the third plate 120 of the housing 100 via the first buffer portion 823. The first buffer portion is configured to reduce vibration at the connection between the second end 822 and the third plate 120. This prevents vibration from the compressor 500 from being transmitted to the housing 100, addressing the issue of low-frequency noise generated by vibration in the housing 100. Furthermore, the first buffer portion 823 enhances the sealing effect between the first sub-mounting cavity 1031 and the second sub-mounting cavity 1021.

[0096] As shown in FIG. 2 and FIG. 3 , in some embodiments, the fresh air air conditioner 1 further includes a heat exchange core 200 , which is disposed on a side of the first partition plate 830 away from the second partition plate 820 .

[0097] It should be noted that the heat exchange core 200 is an efficient and energy-saving heat recovery device, which preheats or precools the introduced fresh air by recovering the waste heat in the exhaust gas, and reduces or increases the enthalpy value of the fresh air before the fresh air is subjected to heat and moisture treatment, thereby effectively reducing the load of the fresh air air conditioner 1, saving the energy consumption and operating costs of the fresh air air conditioner 1, and improving the indoor air quality while also achieving energy saving of the fresh air air conditioner 1.

[0098] The heat exchange core 200 is connected to the third plate 120 and the first partition plate 830 at both ends of the housing 100 in the width direction. Thus, the heat exchange core 200, the third plate 120, and the first partition plate 830 divide the installation cavity into a third sub-installation cavity 1011 and a fourth sub-installation cavity 1041. The third sub-installation cavity 1011 communicates with the first air inlet 101, and the fourth sub-installation cavity 1041 communicates with the second air inlet 104.

[0099] As shown in Figures 2 and 3, in some embodiments, the fresh air air conditioner 1 further includes an air intake fan 600 and an exhaust fan 700. The air intake fan 600 is disposed in the first sub-mounting cavity 1031, and the exhaust fan 700 is disposed in the second sub-mounting cavity 1021. The air intake fan 600 drives outdoor airflow through the air intake channel to be transported indoors, and the exhaust fan 700 drives indoor airflow through the exhaust channel to be output outdoors.

[0100] In some embodiments, as shown in Figures 4 to 6, the compressor assembly further includes a cover 530, which is disposed in the second sub-mounting cavity 1021 and covers the compressor 500. In this way, the noise generated by the compressor 500 during operation can be further isolated from the room, thereby improving the noise reduction effect.

[0101] In some embodiments, as shown in FIG5 , the cover body 530 includes a first baffle 534, a second baffle 535, a third baffle 536, and a fourth baffle 537. A sixth flange 538 is formed on one end of the second baffle 535 that is adjacent to the second plate 130. The sixth flange 538 extends from the second baffle 535 toward a side away from the second partition plate 820. The cover body 530 is fixedly connected to the second plate 130 via the sixth flange 538.

[0102] In some embodiments, as shown in FIG5 , the cover 530 further includes a first opening 532, a second opening 533, and a third opening 531. The first opening 532 is provided on a side of the cover 530 away from the first baffle 534 and is closed by the second plate 130. The second opening 533 is provided on a side of the cover 530 away from the second baffle 535 and is closed by the second partition plate 820. The third opening 531 is provided on the third baffle 536, and the refrigerant pipe group of the compressor assembly can be connected to the compressor 500 through the third opening 531. This makes the compressor assembly structure simpler and can save costs.

[0103] It should be noted that the cover body 530 can be obtained by integrally welding sheet metal, or by fixed connection through a mechanical structure.

[0104] In some embodiments, as shown in Figures 5 and 6, the cover body 530 also includes a noise reduction portion (for example, a noise reduction layer) 540. The noise reduction portion 540 is arranged on the surface of the cover body 530 close to the compressor 500, and the noise reduction portion 540 is matched with the cover body 530. In this way, the sound insulation effect of the cover body 530 can be improved.

[0105] It should be noted that the material of the noise reduction part 540 is, for example, sound insulation cotton, felt or other textiles.

[0106] As shown in Figures 4 and 7, in some embodiments, the fresh air air conditioner 1 also includes a vibration damping component 510, which is arranged in the installation cavity. The compressor 500 is connected to the second plate 130 of the shell 100 through the vibration damping component 510. In this way, the vibration noise generated during the operation of the compressor 500 can be reduced, and the loss of the shell 100 due to the vibration of the compressor 500 can be avoided.

[0107] The vibration reduction assembly 510 includes a first support portion 512 and a second support portion 513. The first support portion 512 and the second support portion 513 are arranged in sequence in a direction perpendicular to the second plate 130, and the first support portion 512 is arranged farther away from the second plate 130 than the second support portion 513. The second support portion 513 is connected to the second plate 130 via fasteners.

[0108] In some embodiments, compressor 500 is, for example, a horizontal compressor, i.e., the cylinder centerline of compressor 500 is arranged parallel to second plate 130. As shown in FIG7 , vibration damping assembly 510 further includes at least one third support portion (e.g., a bracket) 511. The at least one third support portion 511 is disposed on a side of the first support portion 512 proximal to compressor 500. Compressor 500 is connected to the first support portion 512 via the at least one third support portion 511 to reduce vibration between compressor 500 and vibration damping assembly 510. When compressor 500 includes multiple third support portions 511, the multiple third support portions 511 are spaced apart.

[0109] In some embodiments, as shown in FIG7 , the vibration damping assembly 510 further includes at least one first vibration damping portion 5111, which is disposed at one end of the at least one third support portion 511 close to the first support portion 512, and the at least one third support portion 511 is connected to the first support portion 512 via the at least one first vibration damping portion 5111. In this manner, the vibration of the vibration damping assembly 510 caused by the vibration of the compressor 500 during operation, thereby reducing the noise generated.

[0110] In some embodiments, the vibration damping assembly 510 further includes at least one second vibration damping portion 5131 disposed on the second support portion 513. The at least one second vibration damping portion 5131 extends toward the first support portion 512 and abuts against the first support portion 512. When the vibration damping assembly 510 includes multiple second vibration damping portions 5131, the multiple second vibration damping portions 5131 are spaced apart. For example, the second vibration damping portions 5131 may be disposed at the four corners of the second support portion 513. This reduces wear caused by collision between the first support portion 512 and the second support portion 513, as well as noise generated by vibration.

[0111] It should be noted that the materials of the first vibration damping part 5111 and the second vibration damping part 5131 are, for example, rubber or damping rubber.

[0112] In some embodiments, as shown in FIG7 , the vibration-damping assembly 510 further includes a second buffer portion (e.g., a buffer layer) 514 and a third buffer portion (e.g., a buffer layer) 515. The second buffer portion 514 is disposed between the first support portion 512 and the second support portion 513, and the third buffer portion 515 is disposed between the second support portion 513 and the second plate 102. This reduces the up-and-down bumps and vibrations of the compressor 500 during transportation, as well as wear caused by collisions between the vibration-damping assembly 510 and the second plate 130. Furthermore, noise generated by vibrations caused by collisions between the vibration-damping assembly 510 and the second plate 130 can be reduced.

[0113] It should be noted that the material of the second buffer portion 514 and the third buffer portion 515 is, for example, a rubber material with a certain elasticity.

[0114] In some embodiments, as shown in FIG7 , the second buffer portion 514 includes at least one first avoidance portion 5141. The at least one first avoidance portion 5141 is, for example, a through-hole structure, and the at least one first avoidance portion 5141 cooperates with the at least one second vibration damping portion 5131. The at least one second vibration damping portion 5131 is connected to the at least one first support portion 512 via the at least one first avoidance portion 5141.

[0115] As shown in Figures 7 and 9, in some embodiments, the vibration reduction assembly 510 further includes a fourth support portion 520 (e.g., a protrusion), which is disposed on the second plate 130 and corresponds to the compressor 500. The fourth support portion 520 is configured to position and secure the vibration reduction assembly 510 on the second plate 130.

[0116] The fourth support portion 520 positions the vibration damping assembly 510, facilitating its installation. Furthermore, the fourth support portion 520 reduces noise generated by collisions between the vibration damping assembly 510 and the second plate 130. Furthermore, the fourth support portion 520 reduces contact between the compressor 500 and the second plate 130, thereby improving the installation efficiency of the fresh air air conditioner 1 and the structural strength of the housing 100.

[0117] In some embodiments, the fourth support portion 520 is fixed to the second plate 130 by welding or mechanical connection.

[0118] In some embodiments, the vibration damping assembly 510, the second plate 130 and the fourth support portion 520 jointly define a buffer cavity, and the third buffer portion 515 is disposed in the buffer cavity and matches the buffer cavity. When the installation is completed, the third buffer portion 515 is in contact and connected with the second support portion 513.

[0119] In some embodiments, as shown in Figures 1 and 10 , the fresh air air conditioner 1 further includes a heat exchanger assembly disposed within the mounting cavity. The heat exchanger assembly includes a second heat exchanger 400 (e.g., an outlet heat exchanger) and a first heat exchanger 300 (e.g., an inlet heat exchanger). The second heat exchanger 400 and the first heat exchanger 300 are arranged along the length of the housing 100 and are disposed on a first partition plate 830.

[0120] It should be noted that the connection between the second partition plate 820 and the first partition plate 830 is located at the part of the second partition plate 820 where the first heat exchanger 300 is provided. In this way, the refrigerant pipe group connected to the compressor 500 can be directly connected to the end of the first heat exchanger 300.

[0121] In this way, the integrity of the second partition plate 820 can be increased, the noise reduction effect of the second partition plate 820 can be enhanced, and it is helpful to prevent airflow from passing through, thereby improving the sealing performance of the second partition plate 820.

[0122] In some embodiments, as shown in Figures 10 to 13, the fresh air air conditioner 1 also includes a water receiving tray 900, which is arranged below the heat exchanger group. The water receiving tray 900 is configured to collect condensed water formed on the outer walls of the second heat exchanger 400 and the first heat exchanger 300.

[0123] It should be noted that during operation, condensed water may form on the outer wall of the compressor 500. As shown in FIG7 , in some embodiments, the first support portion 512 includes a water collecting portion 5122 and a flow guide portion 5123. The water collecting portion 5122 and the flow guide portion 5123 are configured to discharge the condensed water formed on the outer wall of the compressor 500.

[0124] The water collecting portion 5122 is connected to the flow guide portion 5123, and the end of the flow guide portion 5123 away from the water collecting portion 5122 extends above the water receiving pan 900. In some embodiments, the water collecting portion 5122 extends toward the second support portion 513 in a direction toward the flow guide portion 5123, and the flow guide portion 5123 extends downward away from the water collecting portion 5122. In this way, condensed water dripping from the outer wall of the compressor 500 is directed through the flow guide portion 5123 into the water receiving pan 900, preventing damage to the internal components of the fresh air air conditioner 1 caused by delayed condensed water discharge.

[0125] It should be noted that the direction of the water collecting portion 5122 and the guide portion 5123 toward the water receiving tray 900 is downward, the direction away from the water receiving tray 900 is upward, and the end of the water receiving tray 900 facing the heat exchanger group is upward.

[0126] As shown in Figure 7, in some embodiments, the water collecting portion 5122 is a press-type structure formed on the first support portion 512. At this time, the connection points of the first vibration damping portion 5111 and the second vibration damping portion 5131 with the first support portion 512 are located on the peripheral side of the water collecting portion 5122.

[0127] In other embodiments, as shown in FIG8 , the first support portion 512 further includes a muffler 5124. The muffler 5124 is formed by the bottom of the water collecting portion 5122, protruding toward the third support portion 511. In this case, condensed water in the water collecting portion 5122 is located around the muffler 5124. In this way, the first-order mode of the first support portion 512 can be greater than or equal to the maximum operating range of the compressor 500 (e.g., [15 Hz, 70 Hz]), so that the first support portion 512 avoids the resonance point with the compressor 500 during operation, thereby achieving vibration reduction and noise reduction.

[0128] In some embodiments, the silencer 5124 includes a second guide portion, which is arranged at the edge of the silencer 5124 and extends in a direction toward the first guide portion 5123, so as to facilitate the discharge of condensed water from the water collecting portion 5122 into the first guide portion 5123.

[0129] As shown in Figures 10, 11A, and 12, in some embodiments, the water receiving tray 900 includes a first water receiving area 901 and a second water receiving area 902. The first water receiving area 901 is disposed below the first heat exchanger 300 and is configured to collect condensed water formed on the surface of the first heat exchanger 300. The second water receiving area 902 is disposed below the second heat exchanger 400 and is configured to collect condensed water formed on the surface of the second heat exchanger 400 and condensed water discharged from the first water receiving area 901. It should be noted that the bottom of the first water receiving area 901 is farther away from the second plate 130 than the bottom of the second water receiving area 902. In this way, the influence of the air pressure difference between the first sub-installation cavity 1031 and the second sub-installation cavity 1021 on the discharge of condensed water when the air intake fan 600 and the exhaust fan 700 are turned on can be offset, and the condensed water in the first water receiving area 901 cannot be completely discharged into the second water receiving area 902 when the pressure in the second sub-installation cavity 1021 is greater than the pressure in the first sub-installation cavity 1031 can be avoided.

[0130] It should be noted that the lower side of the first heat exchanger 300 is the end thereof close to the second plate 130 , and the lower side of the second heat exchanger 400 is the end thereof close to the second plate 130 .

[0131] As shown in Figure 12, in some embodiments, the water receiving tray 900 further includes a tenth support portion 903 (e.g., a protrusion). The tenth support portion 903 is disposed on a side of the first water receiving area 901 and the second water receiving area 902 that is adjacent to the heat exchanger assembly and is configured to support the heat exchanger assembly. In some embodiments, the tenth support portion 903 protrudes from the bottom of the water receiving tray 900 by a predetermined height to facilitate supporting the heat exchanger assembly.

[0132] As shown in Figures 10 and 11A, in some embodiments, the water receiving tray 900 further includes a first barrier portion 910. The first barrier portion 910 is disposed between the first water receiving area 901 and the second water receiving area 902, and is located between the first heat exchanger 300 and the water receiving tray 900. The first barrier portion 910 is configured to block the airflow within the first sub-installation cavity 1031 and the airflow within the second sub-installation cavity 1021 from flowing through the water receiving tray 900. In the width direction of the first water receiving area 901 (e.g., the X direction in Figure 10), the length of the first barrier portion 910 matches the width of the first water receiving area 901, thereby separating the first sub-installation cavity 1031 from the second sub-installation cavity 1021.

[0133] In some embodiments, as shown in Figures 11A and 11B, the first blocking portion 910 includes a drainage channel 911 and a third avoidance portion 912. The drainage channel 911 is arranged between the third avoidance portion 912 and the water receiving tray 900 and is configured to drain the condensed water in the first water receiving area 901 into the second water receiving area 902.

[0134] As shown in Figures 14 and 15, in some embodiments, a compressor 500 includes an input end 501 and an output end 502. In the compressor unit, a refrigerant pipe group connected to the compressor 500 includes a first refrigerant pipe 550 and a second refrigerant pipe 560. The input end 501 of the compressor 500 is connected to the heat exchanger group via the first refrigerant pipe 550, and the heat exchanger group is connected to the output end 502 of the compressor 500 via the second refrigerant pipe 560.

[0135] It is understood that the vibration generated by the operation of the compressor 500 will be transmitted to the first refrigerant pipe 550 and the second refrigerant pipe 560. Among them, the first refrigerant pipe 550 is easily affected by the vibration of the compressor 500 during the process of transporting the refrigerant, thereby generating vibration.

[0136] As shown in FIG14 , in some embodiments, the first refrigerant pipe 550 output from the heat exchanger assembly is connected to the compressor 500 by passing through the bottom of the compressor 500. For example, the first refrigerant pipe 550 is connected to the compressor 500 after passing through the middle of the bottom of the compressor 500. This can reduce the distance between the first refrigerant pipe 550 and the vibration center of the compressor 500 (e.g., the center of its crankshaft), thereby reducing the vibration torque, which helps the first refrigerant pipe 550 absorb vibration energy, thereby reducing the vibration of the first refrigerant pipe 550 and reducing noise.

[0137] It should be noted that the bottom of the compressor 500 is the end thereof close to the second plate 130 .

[0138] In some embodiments, as shown in FIG14 , the second refrigerant pipe 560 is connected to the heat exchanger assembly after being connected to the compressor 500 at the bottom of one end in the longitudinal direction (e.g., the Y direction in FIG14 ) of the compressor 500. This prevents interference between the second refrigerant pipe 560 and the first refrigerant pipe 550, thereby preventing collision and contact heat exchange between the first refrigerant pipe 550 and the second refrigerant pipe 560.

[0139] In some embodiments, as shown in FIG15 , the first refrigerant pipe 550 includes a first refrigerant pipe body 552 and a first branch pipe 551; the second refrigerant pipe 560 includes a second refrigerant pipe body 562 and a second branch pipe 561. The first branch pipe 551 is connected to the first refrigerant pipe body 552, and the second branch pipe 561 is connected to the second refrigerant pipe body 562.

[0140] In some embodiments, as shown in FIG15 , the refrigerant tube assembly further includes a plug-in portion 570, which is disposed at the ends of the first branch tube 551 and the second branch tube 561. The first refrigerant tube body 552 is plugged into the first branch tube 551 via the plug-in portion 570, and the second refrigerant tube body 562 is plugged into the second branch tube 561 via the plug-in portion 570. During installation, after the aforementioned plug-in connection is completed, the outer peripheries of the connection portions between the plug-in portion 570 and the first and second refrigerant tube bodies 552, 562 are welded to securely connect the first branch tube 551 and the first refrigerant tube body 552, as well as the second branch tube 561 and the second refrigerant tube body 562, thereby increasing the structural strength of the refrigerant tube assembly.

[0141] As shown in FIG16 , in some embodiments, the heat exchanger assembly further includes a third heat exchanger 310 (e.g., an auxiliary heat exchanger). The third heat exchanger 310 is disposed within the mounting cavity and is configured to perform auxiliary heat exchange on the refrigerant flowing through the first heat exchanger 300 to increase the heat exchange efficiency of the fresh air air conditioner 1. The first heat exchanger 300 and the third heat exchanger 310 are disposed side by side, and the third heat exchanger 310 is located at the air outlet end of the first heat exchanger 300. Both ends of the first heat exchanger 300 are detachably connected to the third heat exchanger 310.

[0142] In some embodiments, during the installation of the heat exchanger assembly, the heat exchanger assembly is pre-installed outside the fresh air air conditioner 1 before being installed in the installation cavity. This improves the installation efficiency of each heat exchanger in the heat exchanger assembly and reduces installation errors between heat exchangers, compared to installing each heat exchanger individually in the installation cavity. This prevents interference with subsequent refrigerant piping installation and further avoids airflow leakage in the fresh air air conditioner 1.

[0143] In some embodiments, as shown in FIG16 , the heat exchanger assembly further includes a first connection portion 320 and a second connection portion 330. The first connection portion 320 is provided at both ends of the first heat exchanger 300 in the longitudinal direction (e.g., direction Q in FIG16 ), and the second connection portion 330 is provided at both ends of the third heat exchanger 310 in the longitudinal direction (e.g., direction Q in FIG16 ). The first heat exchanger 300 and the third heat exchanger 310 are connected via the first connection portion 320 and the second connection portion 330.

[0144] In some embodiments, as shown in FIG17 , the first connection portion 320 includes a first sub-connection portion 321, which extends from the first connection portion 320 toward the first heat exchanger 300 or away from the first heat exchanger 300. The second connection portion 330 includes a second sub-connection portion 331, which extends from the second connection portion 330 toward the third heat exchanger 310 or away from the third heat exchanger 310.

[0145] In some embodiments, as shown in FIG17 , the first connection portion 320 further includes at least one first clamping portion 3211 (e.g., a buckle), and the at least one first clamping portion 3211 is disposed on the first sub-connection portion 321. When multiple first clamping portions 3211 are included, the multiple first clamping portions 3211 are spaced apart along the height direction of the first connection portion 320 (e.g., the W direction in FIG17 ).

[0146] The second connecting portion 330 further includes at least one second clamping portion 3311 (e.g., a clamping hole), and the at least one second clamping portion 3311 is disposed on the second sub-connecting portion 331. In the case where the second connecting portion 330 includes multiple second clamping portions 3311, the multiple second clamping portions 3311 are spaced apart along the height direction of the second connecting portion 330 (e.g., the W direction in FIG. 17 ), and the at least one second clamping portion 3311 cooperates with the at least one first clamping portion 3211. The first connecting portion 320 and the second connecting portion 330 are connected via the at least one second clamping portion 3311 and the at least one first clamping portion 3211.

[0147] During the installation process, the third heat exchanger 310 moves in the direction toward the second plate 130. In the process of the third heat exchanger 310 moving toward the second plate 130, the second clamping parts 3311 at both ends of the third heat exchanger 310 are respectively clamped with the first clamping parts 3211 at both ends of the first heat exchanger 300 to achieve the connection and fixation of the third heat exchanger 310 and the first heat exchanger 300.

[0148] In some embodiments, as shown in FIG16 , the heat exchanger assembly further includes a first fixing portion 340 , which is disposed at ends of the first connecting portion 320 and the second connecting portion 330 away from the second plate 130 and is configured to further fix the first connecting portion 320 and the second connecting portion 330 . The first fixing portion 340 is, for example, a sheet metal structure.

[0149] In some embodiments, as shown in FIG17 , the first fixing portion 340 includes a third overlapping portion 341. The third overlapping portion 341 is disposed at both ends of the first fixing portion 340 in the length direction (e.g., the M direction in FIG17 ) and extends from the first fixing portion 340 toward the second plate 130. The third overlapping portion 341 is detachably connected to the first connecting portion 320 and the second connecting portion 330 via fasteners, respectively, to further securely connect the first heat exchanger 300 and the third heat exchanger 310.

[0150] In some embodiments, as shown in FIG16 , the heat exchanger assembly further includes a third connecting portion 420 and a second fixing portion 430. The third connecting portion 420 is disposed at both ends of the second heat exchanger 400 in its longitudinal direction (e.g., direction Q in FIG16 ). The second fixing portion 430 is disposed at an end of the third connecting portion 420 away from the second plate 130 and is detachably connected to the third connecting portion 420.

[0151] In some embodiments, the second fixing portion 430 includes a fourth overlapping portion 431, which is arranged at both ends of the second fixing portion 430 in the length direction (for example, the N direction in Figure 16), and extends from the second fixing portion 430 toward the second plate 130. The fourth overlapping portion 431 is detachably connected to the third connecting portion 420 through fasteners.

[0152] In some embodiments, as shown in FIG. 18 , the first partition plate 830 includes a fourth connection portion 831 , which is connected to the first fixing portion 340 and the second fixing portion 430 , respectively, to connect and fix the first heat exchanger 300 and the third heat exchanger 310 to the first partition plate 830 .

[0153] In some embodiments, the first connection part 320, the second connection part 330 and the third connection part 420 include connection holes, and the refrigerant pipeline in the heat exchanger group passes through the corresponding connection holes to achieve the connection and fixation between the first connection part 320 and the first heat exchanger 300, the first connection part 320 and the third heat exchanger 310, and the third heat exchanger and the second heat exchanger 400.

[0154] In some embodiments, as shown in Figures 19 and 24A, the third plate 120 of the housing 100 of the fresh air air conditioner 1 includes a first inspection port 131 for accessing components within the installation cavity. The first inspection port 131 is located below the heat exchange core 200, for example, directly below it, and communicates with the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041 on either side of the heat exchange core 200. This allows access to the heat exchange core 200 through the first inspection port 131, while also allowing access to some components within the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041. Furthermore, providing a single inspection port on the housing 100 avoids the impact of multiple inspection ports on the housing 100, which would otherwise be required near multiple components requiring maintenance. For example, the inspection port for accessing the compressor 500 can be eliminated, thereby improving the structural strength of the housing 100.

[0155] It should be noted that the lower side of the heat exchange core 200 is the side thereof close to the second plate 130 .

[0156] In some embodiments, as shown in Figures 18, 19 and 24B, in some embodiments, the shell 100 also includes a first inspection cover 111, which is detachably covered on the first inspection port 131 by fasteners to facilitate inspection of components in the installation cavity.

[0157] In some embodiments, as shown in FIG24A , first access opening 131 includes first stoppers 1311 (e.g., flanged structures) disposed at least on two opposing edges of first access opening 131. First stoppers 1311 are formed by recessing second plate 130 toward the mounting cavity to facilitate connection between first access opening 131 and first access cover 111. In the installed state, the outer surface of second plate 130 is flush with the outer surface of first access cover 111.

[0158] In some embodiments, the first limiting portion 1311 may be integrally formed with the second plate 130 to enhance the structural strength of the housing 100 .

[0159] In some embodiments, as shown in Figure 24A, the first inspection port 131 also includes a first protective portion 1312, which is arranged on the first protective portion 1312. For example, the first protective portion 1312 is a flange structure extending toward the heat exchange core 200, and a second protective portion 1313 is provided on the side of the first inspection port 131 facing the first inspection port 131 to prevent the inner edge of the first inspection port 131 from scratching the heat exchange core 200 during the inspection process, thereby affecting the service life of the heat exchange core 200.

[0160] In some embodiments, as shown in FIG. 24A , the first inspection port 131 further includes a second protective portion 1313 (eg, a protective layer). The second protective portion 1313 is disposed on a side of the first protective portion 1312 close to the heat exchange core 200 and is configured to further protect the heat exchange core 200 .

[0161] It should be noted that the material of the second protection portion 1313 is, for example, a rubber layer (EPDM layer) or a velvet layer, so as to reduce damage to the heat exchange core 200 during maintenance.

[0162] In some embodiments, as shown in Figure 24B, the first inspection cover 111 includes a first inspection cover body 1110 and a second limiting portion 1111. The second limiting portion 1111 is at least arranged on two opposite sides of the first inspection cover body 1110 and cooperates with the first limiting portion 1311 to facilitate the connection between the first inspection port 131 and the first inspection cover 111.

[0163] The second limiting portion 1111 includes a first bending portion 11111, which is formed by an end of the second limiting portion 1111 away from the first inspection cover body 1110, and is bent toward the structural center of the first inspection cover body 1110 along a plane parallel to the first inspection cover body 1110, so as to avoid damage to the second protective portion 1313 caused by the second limiting portion 1111 during the installation of the first inspection cover 111.

[0164] In some embodiments, as shown in FIG. 24B , the first inspection cover 111 further includes a first sealing portion 1112 , and the first sealing portion 1112 is disposed in the middle position of the second limiting portion 1111 .

[0165] In some embodiments, as shown in FIG24B , the first inspection cover 111 further includes a second sealing portion 150, which cooperates with the first sealing portion 1112, and both ends of the second sealing portion 150 in the length direction (for example, the O direction in FIG24B ) extend to the side of the first sealing portion 1112 away from the first inspection cover body 1110, so as to seal the installation gap between the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041 caused by the installation of the heat exchange core 200 and the first inspection cover 111.

[0166] In some embodiments, as shown in FIG21B , the first partition plate 830 further includes a second inspection port 832 disposed between the second heat exchanger 400 and the first heat exchanger 300 to facilitate inspection and maintenance of components within the first sub-installation cavity 1031 and the second sub-installation cavity 1021 of the installation cavity. For example, after removing the heat exchange core 200 from the first inspection port 131, the compressor 500 disposed in the second sub-installation cavity 1021 can be inspected and maintained.

[0167] In some embodiments, as shown in Figures 18 and 21A, the first partition plate 830 also includes a second inspection cover 833, which is detachably covered at the second inspection port 832 and is connected to the first sub-installation cavity 1031 and the second sub-installation cavity 1021 to facilitate inspection of components within the first sub-installation cavity 1031 and the second sub-installation cavity 1021 of the installation cavity.

[0168] In some embodiments, as shown in Figure 21C, the second inspection cover 833 includes a second inspection cover body 8330 and a second bending portion 8331. The second bending portion 8331 is bent from the second inspection cover body 8330 toward the heat exchange core 200 to facilitate the operator to disassemble the second inspection cover 833.

[0169] In some embodiments, the second inspection cover 833 further includes a first threading portion 8332 (e.g., a threading portion or through-hole) and a third sealing portion 8333 (e.g., a sealing plug). The first threading portion 8332 extends through the second inspection cover 833 and is configured to facilitate the passage of a wiring harness. The third sealing portion 8333 cooperates with the first threading portion 8332 and also defines a threading channel therethrough, allowing the wiring harness to pass through the channel while maintaining the seal of the second inspection cover 833. In some embodiments, the third sealing portion 8333 is made of, for example, rubber.

[0170] When the first threading portion 8332 is a virtual threading portion, the virtual threading portion can form a threading hole structure during maintenance, and the wiring harness after maintenance can be passed through this position. During the maintenance process, a sealing plug is also configured for it to improve the sealing of the first threading portion 8332 after the wiring harness passes through.

[0171] In some embodiments, as shown in Figures 20 and 21A, the fresh air air conditioner 1 further includes a connecting assembly 210, which is disposed within the mounting cavity and on a side of the first partition plate 830 away from the compressor assembly. The heat exchange core 200 is detachably connected to the second plate 130 via the connecting assembly 210.

[0172] In some embodiments, as shown in Figure 20, the connecting assembly 210 includes a first abutment portion (e.g., a fixed support member) 230 and a second abutment portion (e.g., a movable support member) 240, and the second abutment portion 240 and the first abutment portion 230 are arranged on the side of the first partition plate 830 away from the compressor assembly.

[0173] The first abutting portion 230 and the second abutting portion 240 are arranged relatively parallel to each other along the length direction of the housing 100. The first abutting portion 230 and the second abutting portion 240 are configured to fix and support the heat exchange core 200.

[0174] In some embodiments, as shown in FIG. 21A , the connecting assembly 210 further includes a third abutting portion 201 , which is disposed opposite to the first abutting portion 230 and the second abutting portion 240 .

[0175] In some embodiments, as shown in FIG20 , the heat exchange core 200 includes a fourth abutting portion 290. The third abutting portion 290 is disposed at both ends of the heat exchange core 200 along the length of the first partition plate 830. The fourth abutting portion 290 cooperates with the third abutting portion 201 to secure the heat exchange core 200. The fourth abutting portion 290 extends from the heat exchange core 200 toward the corresponding third abutting portion 201 in a decreasing direction. The third abutting portion 201 is an open structure and extends from at least one of the first abutting portion 230 or the second abutting portion 240 toward the heat exchange core 200 in an increasing direction to mate with the fourth abutting portion 290 of the heat exchange core 200.

[0176] In some embodiments, the fourth abutting portion 290 of the heat exchange core 200 is chamfered, that is, the corners of the fourth abutting portion 290 are processed to be rounded or beveled. This makes the surface of the fourth abutting portion 290 smoother, reduces stress concentration at the corners, and improves the reliability and durability of the fourth abutting portion 290.

[0177] In some embodiments, as shown in FIG20 , the heat exchange core 200 further includes at least two core assemblies 220 . These at least two core assemblies 220 are arranged along a longitudinal direction perpendicular to the first partition plate 830 , and the end faces of any two adjacent core assemblies 220 are in contact, for example, direct contact. Thus, the size of the first inspection opening 131 is greater than or equal to the size of any core assembly 220 . During disassembly, each core assembly 220 is removed separately. This reduces the size of the first inspection opening 131 while meeting maintenance requirements for the heat exchange core 200 , thereby increasing the structural strength of the housing 100 and reducing the difficulty of disassembly.

[0178] In some embodiments, as shown in FIG22 , the first abutment portion 230 includes a first sub-abutment portion 231 and a second sub-abutment portion 232. The first sub-abutment portion 231 and the second sub-abutment portion 232 are disposed opposite each other along the width direction of the first partition plate 830. The first sub-abutment portion 231 includes a first sub-abutment portion body and a first flange 270. The first flange 270 extends obliquely from the first sub-abutment portion body away from the second sub-abutment portion 232. The second sub-abutment portion 232 includes a second sub-abutment portion body and a second flange 260. The second flange 260 extends obliquely from the second sub-abutment portion body away from the first sub-abutment portion 231. The third abutment portion 201 is formed between the first flange 270 and the second flange 260.

[0179] In some embodiments, as shown in FIG23 , the second abutting portion 240 includes a third sub-abutting portion (e.g., a movable bracket) 241 and a fourth sub-abutting portion (e.g., a movable bracket) 242. The third sub-abutting portion 241 and the fourth sub-abutting portion 242 are disposed opposite each other along the width direction of the first partition plate 830. The third sub-abutting portion 241 includes a third sub-abutting portion body and a third flange 2411. The third flange 2411 extends obliquely from the third sub-abutting portion body toward a direction away from the fourth sub-abutting portion 242. The fourth sub-abutting portion 242 includes a fourth sub-abutting portion body and a fourth flange 2421. The fourth flange 2421 extends obliquely from the fourth sub-abutting portion body toward a direction away from the third sub-abutting portion 241. The third flange 2411 and the fourth flange 2421 form the third abutting portion 201 described above.

[0180] During the maintenance process, the fourth sub-abutment portion 242 needs to be disassembled to achieve the disassembly and maintenance of the core assembly 220 .

[0181] In some embodiments, as shown in FIG23 , the fourth sub-abutting portion 242 further includes a fifth sub-abutting portion 2423 and a sixth sub-abutting portion 2422. The sixth sub-abutting portion 2422 is fixedly connected to the first partition plate 830, and the fifth sub-abutting portion 2423 is detachably connected to the sixth sub-abutting portion 2422. The fifth sub-abutting portion 2423 is disposed on an end of the sixth sub-abutting portion 2422 away from the first partition plate 830.

[0182] The length of the fifth sub-abutment portion 2423 in a direction perpendicular to the first partition plate 830 is greater than or equal to the length of any core assembly 220 in a direction perpendicular to the first partition plate 830. In this way, during maintenance, the fifth sub-abutment portion 2423 can be removed from the sixth sub-abutment portion 2422 and then taken out from the first inspection opening 131 to disassemble and inspect each core assembly 220. For example, after the core assembly 220 close to the fifth sub-abutment portion 2423 in each core assembly 220 is disassembled and taken out from the first inspection opening 131, the core assembly 220 away from the fifth sub-abutment portion 2423 can be moved outward along the third abutment portion 201 to a position close to the fifth sub-abutment portion 2423 and taken out from the first inspection opening 131.

[0183] In some embodiments, as shown in Figure 23, at least one of the second abutting portion 240 or the first abutting portion 230 includes a second threading portion 250 (for example, a threading virtual portion or a through hole) and a fourth sealing portion 251 (for example, a sealing plug). The second threading portion 250 cooperates with the fourth sealing portion 251, and a threading channel is also formed on the fourth sealing portion 251 to facilitate the external wiring harness of the components in the fresh air air conditioner 1, and can ensure the sealing of the surrounding side of the wire harness while allowing the wire harness to pass through the threading channel.

[0184] In some embodiments, the first abutting portion 230 and the second abutting portion 240 further include a wire clamp, which is configured to fix the wire harness passing through the second wire threading portion 250 , so that the wiring of the wire harness is more standardized.

[0185] After the heat exchange core 200 is disassembled, the components (such as the air valve assembly and the electrical box) in the fourth sub-installation cavity 1041 and the third sub-installation cavity 1011 can be inspected directly through the first inspection port 131 .

[0186] In some embodiments, as shown in Figures 25 and 26, the fresh air air conditioner 1 further includes a bridge assembly 280, which is disposed between the first plate 110 and the heat exchange core 200, and the bridge assembly 280 is connected to the first partition plate 830 and the third plate 120 at both ends along its length direction (e.g., the S direction in Figure 26). The bridge assembly 280 is configured to carry a wiring harness so that part of the wiring harness of the components within the installation cavity of the fresh air air conditioner 1 can be externally connected to provide signal or power transmission for the fresh air air conditioner 1.

[0187] In some embodiments, as shown in Figures 26 and 27, the bridge assembly 280 includes a fourth plate 281 and a fifth plate 282, and the fourth plate 281 and the fifth plate 282 are detachably connected, and a wiring channel is formed between the fourth plate 281 and the fifth plate 282 to facilitate the passage of the wiring harness. In this way, the contact between the bridge assembly 280 and the heat exchange core 200 can be reduced, which is beneficial to the insulation between the bridge assembly 280 and the heat exchange core 200, increases the service life of the bridge assembly 280, and improves the safety of use of the fresh air air conditioner 1.

[0188] In some embodiments, the bridge assembly 280 further includes at least one wire clip, which is disposed in the wire passage to secure the wire harness passing through the wire passage.

[0189] In some embodiments, as shown in Figures 26 and 27, the bridge assembly 280 also includes an intermediate bridge 283, which is arranged between the fourth plate 281 and the fifth plate 282. The bridge assembly 280 is connected to the third plate 120 and the first partition plate 830 through the intermediate bridge 283. In this way, during the maintenance process, the fourth plate 281 is removed to facilitate disassembly and maintenance while preventing the wiring harness from falling. In some embodiments, as shown in Figure 26, the intermediate bridge 283 includes a bottom plate 2831 and a plurality of vertical plates 2832, and the bottom plate 2831 is in contact with the fourth plate 281. There is a gap between adjacent vertical plates 2832 in the plurality of vertical plates 2832 to facilitate the wiring harness to be connected from the corresponding gap.

[0190] In some embodiments, as shown in Figure 27, the intermediate bridge frame 283 also includes a fifth flange 2833, and the fifth flange 2833 is arranged at both ends of the connection between the bottom plate 2831 and the third plate 120 and the first partition plate 830. The fifth flange 2833 is detachably connected to the third plate 120 and the first partition plate 830 by fasteners to fix the intermediate bridge frame 283, thereby fixing the bridge frame assembly 280.

[0191] In some embodiments, as shown in FIG. 27 , the bottom plate 2831 includes at least one third access opening 2834 to facilitate access to the wiring harness passing through the bridge assembly 280 .

[0192] In some embodiments, as shown in FIG. 27 , the fourth plate 281 includes a plurality of ninth flanges 2811 , which are engaged with a plurality of vertical plates 2832 of the intermediate bridge 283 to engage the fourth plate 281 with the intermediate bridge 283 .

[0193] In some embodiments, as shown in FIG27 , the fifth plate 282 includes a plurality of third flanges 2821, which are engaged with a plurality of vertical plates 2832 of the intermediate bridge 283 to engage the fifth plate 282 with the intermediate bridge 283. Here, the length of the vertical plates 2832 in a direction perpendicular to the plane of the intermediate bridge 283 is greater than the sum of the lengths of the third flanges 2821 and the ninth flange 2811 in a direction perpendicular to the plane of the intermediate bridge 283, thereby preventing interference between the third flanges 2821 and the ninth flange 2811.

[0194] There are gaps between adjacent ninth flanges 2811 in the plurality of ninth flanges 2811 to facilitate the wiring harness to be connected from the corresponding gaps.

[0195] In other embodiments, the vertical plate 2832 of the intermediate bridge 283 is detachably connected to the fifth plate 282 via fasteners to improve the stability of the connection between the intermediate bridge 283 and the fifth plate 282. In this way, the ninth flange 2811 of the fifth plate 282 can be engaged with the intermediate bridge 283 or directly engaged with the third flange 2821 of the fifth plate 282. In this case, the length of the vertical plate 2832 in a direction perpendicular to the plane of the intermediate bridge 283 is less than the sum of the lengths of the third flange 2821 and the ninth flange 2811 in a direction perpendicular to the plane of the intermediate bridge 283, thereby achieving the engaged connection between the ninth flange 2811 and the third flange 2821.

[0196] In some embodiments, as shown in Figure 27, the bridge assembly 280 also includes a second blocking portion (for example, a sealing block) 285. The second blocking portion 285 is arranged between the middle bridge 283 and the fifth plate 282, and extends along the length direction of the middle bridge 283 to separate the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041, thereby preventing the airflow between the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041 from passing through the bridge assembly 280, thereby increasing the sealing effect of the bridge assembly 280.

[0197] During the installation process, after the heat exchange core 200 is installed, the fourth plate 281 and the intermediate bridge 283 are sequentially arranged on the surface of the heat exchange core 200 close to the first plate 110, and the ninth flange 2811 of the fourth plate 281 is engaged with the intermediate bridge 283, and the fifth flange 2833 of the intermediate bridge 283 is respectively connected and fixed to the first partition plate 830 and the third plate 120, and then the wiring harness is passed through the wiring channel and connected to the various components of the installation cavity. After the wiring is completed, the fifth plate 282 is covered on the end of the intermediate bridge 283 away from the fourth plate 281.

[0198] During maintenance, after removing the heat exchange core 200 from the first access port 131, the fourth plate 281 is removed from the intermediate bridge 283, and the wiring harness is accessed through the third access port on the intermediate bridge 283. During maintenance, some wiring harnesses may become detached from the threading channel, making reconnection difficult. In this case, these harnesses can be connected to the corresponding components through the first threading portion of the first partition plate 830 to complete the maintenance. This facilitates maintenance of the wiring harness within the installation cavity of the fresh air air conditioner 1, improving maintenance efficiency.

[0199] In some embodiments, as shown in Figures 28 and 29, the third plate 120 includes a first side plate 121, a second side plate 122, a third side plate 123, and a fourth side plate 124. The first side plate 121 and the second side plate 122 are disposed opposite each other. The second side plate 122 is disposed on the outdoor unit of the fresh air air conditioner 1, and the first air inlet 101 and the first air outlet 102 are disposed on the second side plate 122. The first side plate 121 is disposed on the indoor unit of the fresh air air conditioner 1, and the second air outlet 103 and the second air inlet 104 are disposed on the first side plate 121. The fourth side plate 124 is in contact with the end surface of the heat exchange core 200.

[0200] In some embodiments, the first side plate 121 , the second side plate 122 , the third side plate 123 and the fourth side plate 124 are integrally formed to improve the sealing effect of the housing 100 and reduce the installation process.

[0201] In some embodiments, as shown in Figure 28, the fresh air air conditioner 1 also includes an eighth support part 1100, which is arranged in the installation cavity. The eighth support part 1100 is, for example, a frame structure and can be connected to the inner surface of the second plate 130 by welding.

[0202] It should be noted that the inner surface of the second plate 130 is the side facing the installation cavity.

[0203] In some embodiments, the eighth support portion 1100 is constructed from multiple support beams connected by welding or mechanical connections. Reinforcement trusses may be added between the support beams to provide support for components within the mounting cavity. This improves the structural strength of the eighth support portion 1100. It should be noted that both the support beams and the reinforcement trusses are made of hollow steel to minimize weight while ensuring structural strength.

[0204] In some embodiments, as shown in Figures 28 and 29, the fresh air air conditioner 1 further includes at least one ninth support portion 1200, which is disposed within the installation cavity and at the connection between two adjacent side panels of the third plate 120. One end of the ninth support portion 1200 is fixedly connected to the eighth support portion 1100 to support the housing 100, thereby increasing the strength of the housing 100 in supporting the components within the installation cavity.

[0205] In some embodiments, the ninth support portion 1200 is fixed to the eighth support portion 1100 by welding to facilitate processing.

[0206] The fresh air air conditioner 1, for example, includes four ninth support parts 1200. At this time, the four ninth support parts 1200 are respectively arranged at the connection between the second side panel 122 and the fourth side panel 124, the connection between the second panel 130 and the third side panel 123, the connection between the first side panel 121 and the fourth side panel 124, and the connection between the first side panel 121 and the third side panel 123.

[0207] As shown in Figures 29 to 31, in some embodiments, at least one ninth support portion 1200 includes a seventh sub-support portion 1210 and an eighth sub-support portion 1220, which are arranged perpendicular to each other. The seventh sub-support portion 1210 is in contact with the first side panel 121 or the second side panel 122, and the eighth sub-support portion 1220 is in contact with the third side panel 123 or the fourth side panel 124.

[0208] In some embodiments, as shown in Figures 29 and 30, at least one ninth supporting portion 1200 further includes a first overlapping portion 1211 and a second overlapping portion 1221. The first overlapping portion 1211 is disposed at an end of the seventh sub-support portion 1210 away from the eighth sub-support portion 1220 and extends from this end toward the eighth sub-support portion 1220. The first overlapping portion 1211 is disposed parallel to the seventh sub-support portion 1210. The second overlapping portion 1221 is disposed at an end of the eighth sub-support portion 1220 away from the seventh sub-support portion 1210 and extends from this end toward the seventh sub-support portion 1210. The second overlapping portion 1221 is disposed parallel to the eighth sub-support portion 1220.

[0209] In some embodiments, the ninth support portion 1200 is formed integrally by bending a sheet metal part, so as to reduce assembly steps, improve work efficiency and the structural strength of the ninth support portion 1200 .

[0210] In some embodiments, as shown in Figures 28 and 32, the ninth support portion 1200 also includes a blocking portion 1300, which is disposed in the installation cavity and is detachably connected to the first overlapping portion 1211 and the second overlapping portion 1221, and is configured to block the side of the ninth support portion 1200 facing the installation cavity.

[0211] In some embodiments, as shown in FIG. 32 , the blocking portion 1300 includes two plates 1310 , which are disposed perpendicular to each other and are detachably connected to the first overlapping portion 1211 and the second overlapping portion 1221 via fasteners, respectively.

[0212] In some embodiments, the blocking portion 1300 is formed as an integral piece by bending a sheet metal part, so as to reduce the assembly process and improve the structural strength of the blocking portion 1300 .

[0213] In some embodiments, as shown in Figure 33, the fresh air air conditioner 1 also includes at least one hanging portion 1600, and the at least one hanging portion 1600 is arranged on the side of the shell 100 away from the installation cavity. The at least one hanging portion 1600 is configured to connect a hanging rope to hang the fresh air air conditioner 1 on the indoor roof through the hanging rope.

[0214] At least one hanging portion 1600 can be arranged on at least one of the second side panel 122 or the first side panel 121. In some embodiments, the hanging portion 1600 is connected and fixed to the ninth support portion 1200 at the corresponding position through the second side panel 122 and the first side panel 121 to ensure the connection stability and connection strength of the hanging portion 1600.

[0215] In some embodiments, as shown in FIG30 , the ninth support portion 1200 , the second side plate 122 and the first side plate 121 each include at least one fifth connection portion 1230 (eg, a through-hole structure), and the at least one fifth connection portion 1230 is configured to achieve connection between structures.

[0216] In some embodiments, as shown in Figure 29, the ninth support portion 1200 connected to the hanging portion 1600 includes a nut 1320, and the nut 1320 is arranged on the side of the ninth support portion 1200 facing the installation cavity. The ninth support portion 1200 is connected to the hanging portion 1600 through a fastener and a nut 1320. For example, the fastener passes through the fifth connecting portion 1230 and is connected to the nut 1320.

[0217] It should be noted that the ninth supporting portion 1200 may include a plurality of fifth connecting portions 1230 and a plurality of nuts 1320 to improve the connection stability between the ninth supporting portion 1200 and the hanging portion 1600 .

[0218] When the nut 1320 needs to be repaired, the sealing portion 1300 can be disassembled to repair or replace the nut 1320 .

[0219] In some embodiments, as shown in Figure 33, the hanging portion 1600 includes a first sub-hanging portion 151 and a second sub-hanging portion 152. The first sub-hanging portion 151 is in contact with and connected to the second side plate 122 or the first side plate 121, and the second sub-hanging portion 152 is connected to the first sub-hanging portion 151, and is arranged perpendicular to the first sub-hanging portion 151. In some embodiments, the second sub-hanging portion 152 is integrally formed with the first sub-hanging portion 151.

[0220] In some embodiments, the second sub-hanging portion 152 includes a hanging interface, which is configured to connect a hanging rope. During installation, the fresh air air conditioner 1 can be hung by fixing the hanging rope to the connection interface.

[0221] During installation, after the second plate 130 and the third plate 120 of the housing 100 are connected, the eighth support portion 1100 is connected and fixed to the second plate 130 . In addition, the eighth support portion 1100 can be connected and formed before installation to improve installation efficiency.

[0222] In some embodiments, as shown in Figure 33, the fresh air air conditioner 1 also includes a foam member 1400, which is arranged between the heat exchange core 200 and the third plate 120. The foam member 1400 is made of foam material, for example, and can absorb part of the noise generated by the components in the installation cavity to achieve a noise reduction function.

[0223] In some embodiments, as shown in Figure 33, the foam part 1400 includes at least one second avoidance portion 1410, and the second avoidance portion 1410 is set according to the connection direction of the wiring harness. For example, the second avoidance portion 1410 is set parallel to the second plate 130, or the second avoidance portion 1410 is set at a predetermined angle to the second plate 130.

[0224] In some embodiments, as shown in Figure 34, the fresh air air conditioner 1 also includes a wire passing portion 1500, which is arranged on the side of the second avoidance portion 1410 close to the installation cavity. The wire passing portion 1500 and the third plate 120 and the foam part 1400 are jointly arranged to form a wire passing channel. The two ends of the wire passing channel are respectively connected to the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041. The wiring harness passes through the wire passing channel to avoid direct contact between the wiring harness and the heat exchange core 200.

[0225] In some embodiments, the wire passing portion 1500 is an integrally formed sheet metal structure to facilitate processing and installation.

[0226] In some embodiments, as shown in Figure 34, the wire-passing portion 1500 includes a first wire-passing plate 1510, a second wire-passing plate 1511, and a third wire-passing plate 1512. The second wire-passing plate 1511 and the third wire-passing plate 1512 are disposed on both sides of the first wire-passing plate 1510 along its width direction (e.g., direction E in Figure 34), and the second wire-passing plate 1511 and the third wire-passing plate 1512 extend in opposite directions.

[0227] As shown in FIG. 35 to FIG. 37 , the wire-passing portion 1500 matches the avoidance portion 1401 , and the second wire-passing plate 1511 is connected to the third plate 120 by welding or mechanical connection such as fasteners.

[0228] The third wire-passing plate 1512 and the surface of the foam member 1400 close to the installation cavity are in the same plane, so that the third wire-passing plate 1512 and the foam member 1400 are in contact and connected with the heat exchange core 200, reducing the generation of connection gaps.

[0229] During the installation process, after the second wire-passing plate 1511 of the wire-passing portion 1500 is connected to the third plate 120 , the avoidance portion 1401 of the foam part 1400 is arranged corresponding to the wire-passing portion 1500 .

[0230] In some embodiments, a sealing strip is provided in the wire passage, and the sealing strip is, for example, a sealing rubber strip. After the wiring harness passes through the wire passage, the sealing strip is used to seal other areas in the wire passage to further improve the sealing between the third sub-installation cavity 1011 and the fourth sub-installation cavity 1041.

[0231] This prevents the wiring harness from creating gaps around the third plate 120 and the heat exchange core 200 when passing between them. This could allow airflow between the third sub-mounting cavity 1011 and the fourth sub-mounting cavity 1041 to flow through the gaps, potentially affecting the air conditioner's performance. Furthermore, this prevents the wiring harness from coming into direct contact with the heat exchange core 200, which could cause friction and wear between them and shorten their service life.

[0232] In some embodiments, the operation modes of the fresh air air conditioner 1 include, for example, a non-cooling dehumidification mode, a cooling mode, and a heating mode.

[0233] In some embodiments, as shown in Figure 38, the fresh air air conditioner 1 also includes a four-way valve 10, which is configured to realize the mutual conversion of the fresh air air conditioner 1 between cooling mode, heating mode and dehumidification mode by changing the flow direction of the refrigerant in the refrigerant pipeline of the fresh air air conditioner 1.

[0234] As shown in Figure 39, the four-way valve 10 includes a first port 11, a second port 12, a third port 13, and a fourth port 14. In some embodiments, the first port 11 is in communication with the second heat exchanger 400, the second port 12 is in communication with the first heat exchanger 300, the third port 13 is in communication with the input end 501 of the compressor 500, and the fourth port 14 is in communication with the output end 502 of the compressor 500.

[0235] In some embodiments, as shown in Figures 10 and 38, the fresh air air conditioner 1 further includes an ice melting unit 410, which is disposed below the second heat exchanger 400. The ice melting unit 410 includes an ice melting pipe (e.g., a copper pipe) for the refrigerant to pass through, and at least a portion of the ice melting unit 410 is located within the water receiving tray 900 so as to be as close as possible to the surface of the condensed water within the water receiving tray 900.

[0236] The ice melting unit 410 is configured to cool the condensed water in the water receiving pan 900 and the bottom of the second heat exchanger 400. This prevents the water receiving pan 900 from freezing due to the low temperature of the second heat exchanger 400 when the fresh air air conditioner 1 is operating in heating mode in winter, or softening and damaging the water receiving pan 900 when the fresh air air conditioner 1 is operating in cooling mode or non-cooling dehumidification mode in summer due to the second heat exchanger 400 being directly connected to the output terminal 502 of the compressor 500.

[0237] In some embodiments, as shown in Figure 38, the refrigerant pipeline includes a first refrigerant main line 21 and a second refrigerant main line 22, the second heat exchanger 400 is connected to the first interface 11 through the first refrigerant main line 21, and the first heat exchanger 300 is connected to the second interface 12 through the second refrigerant main line 22.

[0238] In some embodiments, as shown in Figure 38, the refrigerant pipeline also includes a first refrigerant branch 23 and a second refrigerant branch 24, the second heat exchanger 400 is connected to the third heat exchanger 310 through the first refrigerant branch 23, and the second heat exchanger 400 is connected to the ice melting part 410 through the second refrigerant branch 24.

[0239] In some embodiments, the refrigerant pipeline further includes a first refrigerant auxiliary line 25 and a second refrigerant auxiliary line 26. The third heat exchanger 310 is connected to the second refrigerant branch line 24 via the first refrigerant auxiliary line 25. That is, the refrigerant output from the third heat exchanger 310 can enter the ice melting unit 410 through the first refrigerant auxiliary line 25. The ice melting unit 410 is connected to the first heat exchanger 300 via the second refrigerant auxiliary line 26.

[0240] The fresh air air conditioner 1 further includes a switch component, which is provided on the second refrigerant branch 24 and configured to control the on-off state of the second refrigerant branch 24 and the flow direction of the refrigerant in the second refrigerant branch 24 .

[0241] In some embodiments, as shown in FIG38 , the switch element includes, for example, an on-off valve 40 and a one-way valve 50. The on-off valve 40 is disposed on the second refrigerant branch 24 and is configured to control the on-off of the second refrigerant branch 24. The one-way valve 50 is disposed between the on-off valve 40 and the ice melting unit 410 and is unidirectionally conductive in a direction from the on-off valve 40 toward the ice melting unit 410. The one-way valve 50 is configured to control the one-way flow of refrigerant from the second heat exchanger 400 toward the ice melting unit 410.

[0242] In some embodiments, as shown in FIG38 , the fresh air air conditioner 1 includes an expansion valve group, which includes a first expansion valve 31 and a second expansion valve 32. The first expansion valve 31 is provided on the first refrigerant branch line 23, and the second expansion valve 32 is provided on the second refrigerant auxiliary line 26. The first expansion valve 31 and the second expansion valve 32 are configured to expand a high-pressure liquid-phase refrigerant into a low-pressure gas-liquid two-phase refrigerant.

[0243] In some embodiments, as shown in Figure 38, the fresh air air conditioner 1 also includes a filter 70, which is arranged at both ends of the first expansion valve 31 and the second expansion valve 32, and is configured to filter impurities deposited when the refrigerant passes through the first expansion valve 31 and the second expansion valve 32 to ensure the smooth flow of the refrigerant pipeline.

[0244] In some embodiments, as shown in FIG38 , the fresh air air conditioner 1 further includes a filling valve 80 , which is disposed on the first refrigerant main line 21 and the first refrigerant branch line 23 and is configured to replenish refrigerant into the refrigerant pipeline.

[0245] As shown in Figure 39, when fresh air air conditioner 1 is operating in heating mode, first port 11 and third port 13 of four-way valve 10 are connected, second port 12 and fourth port 14 are connected, and second expansion valve 32 is fully open. At this time, first heat exchanger 300 and third heat exchanger 310 function as condensers, and second heat exchanger 400 functions as an evaporator.

[0246] The low-temperature, low-pressure gas-phase refrigerant is compressed by the compressor 500 into a high-temperature, high-pressure gas-phase refrigerant. This high-temperature, high-pressure gas-phase refrigerant then flows through the four-way valve 10, through the second main refrigerant path 22, and into the first heat exchanger 300. The first heat exchanger 300 condenses the high-temperature, high-pressure gas-phase refrigerant into a medium-temperature, high-pressure liquid-phase refrigerant, releasing heat into the surrounding environment during the condensation process. The medium-temperature, high-pressure liquid-phase refrigerant then flows through the second expansion valve 32 and the ice melting unit 410 and into the third heat exchanger 310. The third heat exchanger 310 further condenses the medium-temperature, high-pressure liquid-phase refrigerant and outputs it to the first expansion valve 31. First expansion valve 31 reduces the pressure and throttles the medium-temperature, high-pressure liquid refrigerant into a low-pressure, gas-liquid two-phase refrigerant. Second heat exchanger 400 absorbs heat from the surrounding environment and evaporates the low-pressure, gas-liquid two-phase refrigerant into a low-temperature, low-pressure gas-phase refrigerant. This low-temperature, low-pressure gas-phase refrigerant returns to compressor 500 via four-way valve 10, completing the heating cycle. The arrows in Figure 39 represent the refrigerant flow direction when fresh air air conditioner 1 is in heating mode.

[0247] At this time, since the second heat exchanger 400 is an evaporator, the internal pressure of the second heat exchanger 400 is lower than the first preset pressure, and the liquid refrigerant in the second heat exchanger 400 evaporates rapidly to absorb heat, so that the surface temperature of the second heat exchanger 400 is relatively low. The second heat exchanger 400 contacts the tenth support part 903 of the water receiving tray 900 for heat exchange, thereby causing the temperature of the water receiving tray 900 to drop, causing the condensed water in the water receiving tray 900 to freeze.

[0248] In some embodiments of the present disclosure, an ice melting section 410 is provided below the second heat exchanger 400, and the refrigerant passing through the ice melting section 410 is in a medium-temperature and high-pressure state, so that the condensed water in the water receiving tray 900 can be heated, thereby effectively preventing the condensed water in the water receiving tray 900 from freezing due to the surface temperature of the second heat exchanger 400 being too low.

[0249] As shown in Figure 40, when the fresh air air conditioner 1 is operating in the cooling mode, the first interface 11 of the four-way valve 10 is connected to the fourth interface 14, the second interface 12 is connected to the third interface 13, the switch valve 40 is opened, and the first expansion valve 31 is in the closed state. At this time, the third heat exchanger 310 is bypassed, the first heat exchanger 300 serves as an evaporator, and the second heat exchanger 400 serves as a condenser.

[0250] After being compressed by compressor 500, the low-temperature, low-pressure gas-phase refrigerant is converted into high-temperature, high-pressure gas-phase refrigerant. This high-temperature, high-pressure gas-phase refrigerant then flows through four-way valve 10, through the first refrigerant main path 21, and into the second heat exchanger 400. The second heat exchanger 400 condenses the high-temperature, high-pressure gas-phase refrigerant into medium-temperature, high-pressure liquid-phase refrigerant, releasing heat to the surrounding environment during the condensation process. The medium-temperature, high-pressure liquid-phase refrigerant then flows through the ice melting unit 410 and flows into the second expansion valve 32. The second expansion valve 32 throttles and reduces the pressure of the medium-temperature, high-pressure liquid-phase refrigerant, converting it into a low-pressure gas-liquid two-phase refrigerant. The first heat exchanger 300 absorbs heat from the surrounding environment and evaporates the low-pressure gas-liquid two-phase refrigerant to form low-temperature, low-pressure gas-phase refrigerant. This low-pressure gas-phase refrigerant then returns to compressor 500 through four-way valve 10, completing the refrigeration cycle. The arrows in FIG. 40 represent the direction of refrigerant flow when the fresh air air conditioner 1 is in cooling mode.

[0251] At this time, since the second heat exchanger 400 acts as a condenser, the compressor 500 outputs high-temperature and high-pressure gas-phase refrigerant into the second heat exchanger 400, and the internal pressure of the second heat exchanger 400 is greater than the second preset pressure. The gas-phase refrigerant in the second heat exchanger 400 quickly condenses and releases heat, causing the surface temperature of the second heat exchanger 400 to rise. The bottom of the second heat exchanger 400 contacts the tenth support part 903 of the water receiving tray 900 for heat exchange, causing the water receiving tray 900 to deform due to heat.

[0252] In some embodiments of the present disclosure, by providing an ice melting portion 410 below the second heat exchanger 400, direct contact between the water receiving pan 900 and the second heat exchanger 400 can be avoided, and the refrigerant passing through the ice melting portion 410 is in a medium-temperature and high-pressure state. In this way, the lower portion of the second heat exchanger 400 and the water receiving pan 900 can be cooled to prevent the water receiving pan 900 from being deformed by heat.

[0253] As shown in Figure 41, when the fresh air air conditioner 1 is operating in the non-cooling dehumidification mode, that is, when the fresh air air conditioner 1 is running and it is necessary to dehumidify the indoor air temperature without cooling it, the first interface 11 of the four-way valve 10 is connected to the fourth interface 14, the second interface 12 is connected to the third interface 13, the switch valve 40 is closed, and the first expansion valve 31 is fully open; at this time, the second heat exchanger 400 and the third heat exchanger 310 act as condensers, and the first heat exchanger 300 acts as an evaporator.

[0254] After being compressed by compressor 500, the low-temperature, low-pressure gas-phase refrigerant is converted into high-temperature, high-pressure gas-phase refrigerant. This high-temperature, high-pressure gas-phase refrigerant then flows through four-way valve 10, through the first main refrigerant path 21, and into second heat exchanger 400. Second heat exchanger 400 and third heat exchanger 310 condense the high-temperature, high-pressure gas-phase refrigerant into low-temperature, high-pressure liquid-phase refrigerant, releasing heat into the surrounding environment during the condensation process. The low-temperature, high-pressure liquid-phase refrigerant then flows through ice melting unit 410 and flows into second expansion valve 32. Second expansion valve 32 throttles and reduces the pressure of the low-temperature, high-pressure liquid-phase refrigerant, converting it into a low-pressure gas-liquid two-phase refrigerant. The first heat exchanger 300 absorbs heat from the surrounding environment and evaporates the low-pressure gas-liquid two-phase refrigerant to form low-temperature, low-pressure gas-phase refrigerant. This low-temperature, low-pressure gas-phase refrigerant then returns to compressor 500 through four-way valve 10, completing a non-cooling dehumidification cycle. The arrows in FIG41 indicate the flow direction of the refrigerant when the fresh air air conditioner 1 is in the non-cooling and dehumidifying mode.

[0255] At this time, since the second heat exchanger 400 is a condenser, the compressor 500 outputs high-temperature and high-pressure refrigerant into the second heat exchanger 400. The internal pressure of the second heat exchanger 400 is greater than the first preset pressure, causing the temperature of the second heat exchanger 400 to rise. The second heat exchanger 400 contacts and exchanges heat with the tenth support part 903 of the water receiving tray 900, causing the water receiving tray 900 to deform due to heat.

[0256] In some embodiments, the operation mode of the fresh air air conditioner 1 also includes a cooling and dehumidification mode. When the fresh air air conditioner 1 operates in the cooling and dehumidification mode, the refrigerant flow direction in the fresh air air conditioner 1 is consistent with the refrigerant flow direction in the cooling mode, as shown in FIG38.

[0257] In some embodiments of the present disclosure, by providing an ice melting portion 410 below the second heat exchanger 400, direct contact between the water receiving pan 900 and the second heat exchanger 400 can be avoided, and the refrigerant passing through the ice melting portion 410 is in a low-temperature and high-pressure state. In this way, the condensed water below the second heat exchanger 400 and in the water receiving pan 900 can be cooled to prevent the water receiving pan 900 from being deformed by heat.

[0258] 42 , the refrigerant pipeline further includes a third refrigerant branch 27 . The second heat exchanger 400 is connected to the third heat exchanger 310 via the first refrigerant branch 23 , and the second heat exchanger 400 is connected to the first heat exchanger 300 via the third refrigerant branch 27 .

[0259] In some embodiments, the refrigerant pipeline further includes a third refrigerant auxiliary line 28 and a fourth refrigerant auxiliary line 29. The third heat exchanger 310 is connected to the third refrigerant branch line 27 via the third refrigerant auxiliary line 28. One end of the fourth refrigerant auxiliary line 29 is connected to the junction of the third refrigerant branch line 27 and the third refrigerant auxiliary line 28, and the other end is connected to the first heat exchanger 300 to facilitate connection with the first heat exchanger 300.

[0260] 42 , the fresh air air conditioner 1 further includes a third expansion valve 33 and a fourth expansion valve 34. The third expansion valve 33 is provided on the third refrigerant branch line 27, and the fourth expansion valve 34 is provided on the third refrigerant auxiliary line 28.

[0261] The third heat exchanger 310 is connected in series with the second heat exchanger 400. In the cooling state, it can act as a condenser to achieve the purpose of dehumidification without cooling by heating the low-temperature air output from the first heat exchanger 300 (recovering sensible heat and cooling).

[0262] In some embodiments, the current indoor humidity is defined as RHi, the target humidity is defined as RHs, the actual indoor temperature is defined as Ti, and the target indoor temperature is defined as Ts.

[0263] In some embodiments, the fresh air air conditioner 1 further includes a controller 90, which is configured to: when the difference between the actual indoor humidity RHi and the target humidity RHs is greater than a preset humidity difference RH1, control the fresh air air conditioner 1 to operate in a dehumidification mode; otherwise, determine the temperature difference between the actual indoor temperature Ti and the target indoor temperature Ts; if the difference between the actual indoor temperature Ti and the target indoor temperature Ts is determined to be greater than a first preset temperature difference T1, control the fresh air air conditioner 1 to operate in a cooling mode; and if the difference between Ti and Ts is determined to be less than a second preset temperature difference T2, control the fresh air air conditioner 1 to operate in a heating mode. The first preset temperature difference T1 is greater than the second preset temperature difference T2.

[0264] In this way, the problem of the single operation mode of the fresh air air conditioner can be solved, and the operation mode of the fresh air air conditioner 1 can be switched according to needs, simplifying the mode switching of the fresh air air conditioner 1. In addition, the problem of the risk of shutdown when the fresh air air conditioner works under high pressure is also solved.

[0265] The present disclosure provides a control method for a fresh air air conditioner 1, which is applied to a controller 90. As shown in FIG43 , in some embodiments, the control method includes S10 to S17.

[0266] S10, the fresh air air conditioner 1 starts running.

[0267] S11. Determine whether the difference between the actual indoor humidity RHi and the target humidity RHs is greater than the preset humidity difference RH1. If so, execute S12; if not, execute S13.

[0268] S12: Control the fresh air air conditioner 1 to operate in the dehumidification mode.

[0269] If it is determined that the difference between the actual indoor humidity RHi and the target humidity RHs is greater than the preset humidity difference RH1, it indicates that the actual indoor humidity is higher than the preset humidity threshold RHset. At this time, the indoor air needs to be dehumidified first, and the fresh air air conditioner 1 operates in dehumidification mode.

[0270] As shown in Figure 44, when the fresh air air conditioner operates in dehumidification mode, the first port 11 of the four-way valve 10 is connected to the fourth port 14, the second port 12 is connected to the third port 13, the first expansion valve 31 is fully open, and the third expansion valve 33 is closed. In this case, the second heat exchanger 400 and the third heat exchanger 310 function as a condenser, and the first heat exchanger 300 functions as an evaporator.

[0271] At this time, the fourth expansion valve 34 adjusts parameters according to control requirements, and the first expansion valve 31 and the third expansion valve 33 are used to adjust the flow of the third heat exchanger 310.

[0272] In some embodiments, as shown in FIG. 45 , when the fresh air air conditioner 1 operates in the dehumidification mode, the high pressure value Pds is judged. At this time, S12 also includes S121 to S124 .

[0273] S121. Control the fresh air air conditioner 1 to operate in dehumidification mode.

[0274] S122 , determining whether the high pressure value Pds is less than or equal to the preset pressure value Pdmax; if so, executing S123 ; if not, executing S124 .

[0275] If it is determined that the high-pressure pressure value Pds is less than or equal to the preset pressure value Pdmax, it is considered that the high-pressure pressure value Pds of the fresh air air conditioner 1 is within the preset pressure range, and the components of the fresh air air conditioner 1 are operating normally. If it is determined that the high-pressure pressure value Pds is greater than the preset pressure value Pdmax, it is considered that the high-pressure pressure value Pds of the fresh air air conditioner 1 exceeds the preset pressure range.

[0276] S123. Determine whether the difference between the outlet air temperature To of the fresh air air conditioner 1 and the actual indoor temperature Ti is greater than a third preset temperature difference T3. If so, execute S1231; if not, execute S124.

[0277] S1231 . Increase the opening of the third expansion valve 33 to a first preset opening, and decrease the opening of the first expansion valve 31 to a second preset opening.

[0278] If the difference between the outlet air temperature To and the actual indoor temperature Ti is greater than the third preset temperature difference T3, the outlet air temperature To is deemed excessively high. In this case, the opening of the third expansion valve 33 is increased to the first preset opening, and the opening of the first expansion valve 31 is decreased to the second preset opening. This increases the amount of refrigerant flowing through the third expansion valve 33 while reducing the amount of refrigerant flowing through the third heat exchanger 310 to ensure a comfortable outlet air temperature To. It also allows the fresh air air conditioner 1 to switch between a non-cooling and dehumidifying mode and a cooling and dehumidifying mode.

[0279] S124: Keep the third expansion valve 33 closed and the first expansion valve 31 fully open.

[0280] When the difference between the outlet air temperature To and the actual indoor temperature Ti is less than or equal to the third preset temperature difference T3, the outlet air temperature To is considered to be within the preset temperature range. At this time, the third expansion valve 33 is kept closed and the first expansion valve 31 is fully opened, so that all refrigerant flows through the third heat exchanger 310 to fully utilize the third heat exchanger 310 and increase the volume and heat exchange area of ​​the refrigerant in the fresh air air conditioner 1.

[0281] When the high-pressure value Pds of the fresh air air conditioner 1 is greater than the preset pressure value Pdmax, the third expansion valve 33 is kept closed and the first expansion valve 31 is fully open, so that all the refrigerant flows through the third heat exchanger 310 for circulation, so as to increase the volume of the refrigerant in the fresh air air conditioner 1, avoid the fresh air air conditioner 1 from shutting down or causing damage to its internal components due to excessive pressure, and increase the dehumidification efficiency of the fresh air air conditioner 1.

[0282] S13. Determine whether the difference between the actual indoor temperature Ti and the target indoor temperature Ts is greater than the first preset temperature difference T1. If so, execute S14; if not, execute S15.

[0283] If it is determined that the difference between the actual indoor humidity RHi and the target humidity RHs is less than or equal to the preset humidity difference RH1, it indicates that the actual indoor humidity is less than or equal to the preset humidity threshold RHset, and the indoor air does not need to be dehumidified.

[0284] At this time, the difference between the actual indoor temperature Ti and the target indoor temperature Ts is compared with the first preset temperature difference T1.

[0285] S14: Control the fresh air air conditioner 1 to operate in cooling mode.

[0286] If it is determined that the difference between the actual indoor temperature Ti and the target indoor temperature Ts is greater than the first preset temperature difference T1, it indicates that the actual indoor temperature Ti is higher than the first preset temperature threshold Tset1. At this time, the indoor air needs to be cooled, and the fresh air air conditioner 1 operates in cooling mode.

[0287] As shown in Figure 46, when the fresh air air conditioner 1 is operating in cooling mode, the first port 11 of the four-way valve 10 is connected to the fourth port 14, and the second port 12 is connected to the third port 13. At this time, the first expansion valve 31 and the fourth expansion valve 34 are closed, the third expansion valve 33 is open, and the third heat exchanger 310 is bypassed to reduce the impact of the refrigerant flowing through the third heat exchanger 310 on the outlet air temperature To. The first heat exchanger 300 acts as an evaporator, and the second heat exchanger 400 acts as a condenser.

[0288] As shown in FIG. 47 , in some embodiments, when the fresh air air conditioner 1 operates in the cooling mode, the high pressure value Pds is judged. At this time, S14 also includes S141 to S144.

[0289] S141. Control the fresh air air conditioner 1 to operate in cooling mode.

[0290] S142 , determining whether the high pressure value Pds is less than or equal to the preset pressure value Pdmax; if so, executing S143 ; if not, executing S144 .

[0291] S143 , closing the first expansion valve 31 and the fourth expansion valve 34 , and controlling the opening of the third expansion valve 33 according to the parameters.

[0292] At this time, the controller 90 adjusts the opening of the third expansion valve 33 according to the parameters to control the parameters of the refrigerant system to ensure the cooling effect of the fresh air air conditioner 1.

[0293] In this way, the fresh air air conditioner 1 has a compact structure and does not require a liquid storage tank to store excess refrigerant.

[0294] S144 , reducing the opening degree of the third expansion valve 33 , and opening the first expansion valve 31 and the fourth expansion valve 34 to a preset opening degree.

[0295] When the high-pressure value Pds of the fresh air air conditioner 1 is greater than the preset pressure value Pdmax, the first expansion valve 31 and the third expansion valve 33 are opened to the preset opening to increase the refrigerant capacity of the fresh air air conditioner 1 to avoid the fresh air air conditioner 1 shutting down due to excessive pressure or causing damage to its internal components.

[0296] Moreover, after the first expansion valve 31 and the third expansion valve 33 are opened, the third heat exchanger 310 acts as a liquid storage container, which can effectively balance the high pressure in the fresh air air conditioner 1 and avoid problems such as frequency reduction and shutdown.

[0297] In addition, opening the first expansion valve 31 and the fourth expansion valve 34 to a preset opening degree can prevent the amount of refrigerant flowing through the third heat exchanger 310 from exceeding the preset refrigerant amount, thereby reducing the cooling effect of the fresh air air conditioner 1.

[0298] At this time, the third heat exchanger 310 is arranged between the first heat exchanger 300 (which serves as an evaporator at this time) and the air intake fan 600, which can avoid condensation of water mist and cause condensation on the surface of the air intake fan 600.

[0299] S15. Determine whether the difference between the actual indoor temperature Ti and the target indoor temperature Ts is less than a fourth preset temperature difference T4. If so, execute S16; if not, execute S17.

[0300] S16: Control the fresh air air conditioner 1 to operate in heating mode.

[0301] If it is determined that the difference between the actual indoor temperature Ti and the target indoor temperature Ts is less than the fourth preset temperature difference T4, it indicates that the actual indoor temperature Ti is lower than the second preset temperature threshold Tset2. At this time, the indoor air needs to be heated, and the fresh air air conditioner 1 operates in heating mode.

[0302] As shown in Figure 48, when fresh air air conditioner 1 is operating in heating mode, first port 11 and third port 13 of four-way valve 10 are connected, second port 12 and fourth port 14 are connected, and third expansion valve 33 is fully open. At this time, first heat exchanger 300 and third heat exchanger 310 function as condensers, and second heat exchanger 400 functions as an evaporator.

[0303] This increases the internal volume and heat exchange area of ​​the condenser, thereby enhancing the heating capacity of the fresh air air conditioner 1. Furthermore, the fresh air air conditioner 1 has a compact structure and eliminates the need for a liquid storage tank to store excess refrigerant. Furthermore, the surface temperature of the first heat exchanger 300 can be lowered, reducing wear and tear on components near the first heat exchanger 300 and extending its service life.

[0304] S17. Control the fresh air air conditioner 1 to shut down.

[0305] If it is determined that the indoor environment meets the requirements, the fresh air air conditioner 1 is controlled to shut down.

[0306] As long as the refrigerant flows through the third heat exchanger 310, it will be used as a condenser. After passing through the second heat exchanger 400 or the first heat exchanger 300, the refrigerant entering the third heat exchanger 310 is in a gas-liquid two-phase state. At this time, connecting the diverter capillary will have a throttling effect and increase the system resistance.

[0307] Therefore, in order to reduce flow resistance loss, two ends of the third heat exchanger 310 are connected to diversion pipes.

[0308] After the refrigerant is condensed by the condenser (such as the second heat exchanger 400 or the first heat exchanger 300), it enters the third heat exchanger 310. Therefore, the refrigerant entering the third heat exchanger 310 is in a gas-liquid two-phase state. The microchannel heat exchanger improves efficiency and reduces resistance.

[0309] In some embodiments, as shown in Figures 49 and 50, the first refrigerant branch 23 includes a first pipeline 233 and a second pipeline 234, which are respectively connected to the two ends of the first expansion valve 31, and the other ends of the first pipeline 233 and the second pipeline 234 away from the first expansion valve 31 are tied and fixed to the adjacent refrigerant pipeline by cable ties to improve the stability between the first refrigerant branch 30 and the adjacent refrigerant pipeline and reduce the generation of vibration.

[0310] In some embodiments, as shown in FIG51 , the fresh air air conditioner 1 further includes an indoor gas detection component 450 and an outdoor gas detection component 580. The indoor gas detection component 450 is disposed on the exhaust passage within the fourth sub-mounting cavity 1041 so that it can fully contact the indoor return air. The indoor gas detection component 450 is configured to detect gas parameters (e.g., temperature, humidity, PM2.5) of the indoor return air. The outdoor gas detection component 580 is disposed on the air inlet passage within the third sub-mounting cavity 1011 so that it can fully contact the outdoor fresh air. The outdoor gas detection component 580 is configured to detect gas parameters (e.g., temperature, humidity, PM2.5, CO2, VOC) of the outdoor fresh air.

[0311] It should be noted that the indoor gas detection component 450 and the outdoor gas detection component 580 can select sensor components based on the requirements for detecting gas parameters. For example, the detection component model TPM-7AIR-06 is configured to perform gas detection (such as detecting VOC, formaldehyde, CO2), as well as detecting PM2.5, PM1.0, and temperature and humidity; the detection component model PMS5003T is configured to detect PM2.5, temperature, and humidity.

[0312] In some embodiments, as shown in FIG52 , the fresh air air conditioner 1 further includes a first mounting portion 61 and a second mounting portion 62. The first mounting portion 61 is disposed on the exhaust passage within the fourth sub-mounting cavity 1041; the second mounting portion 62 is disposed on the intake passage within the third sub-mounting cavity 1011. The indoor gas detection assembly 450 is disposed on the first mounting portion 61, and the outdoor gas detection assembly 580 is disposed on the second mounting portion 62.

[0313] The first mounting portion 61 includes a bottom wall and side walls, wherein the bottom wall contacts the second plate 130 and the side walls surround the bottom wall. The second mounting portion 62 includes a bottom wall and side walls, wherein the bottom wall contacts the second plate 130 and the side walls surround the bottom wall.

[0314] In some embodiments, as shown in FIG. 53 and FIG. 54 , the first mounting portion 61 includes a third fixing portion 611 , which is obliquely disposed on a side wall of the first mounting portion 61 to obliquely fix the indoor gas detection assembly 450 .

[0315] In some embodiments, the first mounting portion 61 further includes at least one first filter assembly 612, which is positioned on the side of the indoor gas detection assembly 450 near the second air inlet 104 to filter the indoor return air. For example, as shown in FIG53 , the at least one first filter assembly 612 includes a first sub-filter assembly 6121 (e.g., a coarse filter) and a second sub-filter assembly 6122 (e.g., a medium filter). The first sub-filter assembly 6121 is positioned obliquely on the side of the indoor gas detection assembly 450 near the second air inlet 104, while the second sub-filter assembly 6122 is positioned obliquely on the side of the indoor gas detection assembly 450 away from the second air inlet 104. This increases the contact area between the at least one first filter assembly 612 and the indoor return air, achieving sufficient filtration of the indoor return air. Furthermore, it prevents contaminants in the indoor return air from affecting the heat exchange core 200 and the exhaust fan 700, thereby ensuring the operational reliability of the heat exchange core 200 and the exhaust fan 700.

[0316] It should be noted that the first sub-filter assembly 6121 is tilted toward the second air inlet, and the second sub-filter assembly 6122 is also tilted toward the second air inlet.

[0317] In some embodiments, as shown in Figures 53 and 54, the first mounting portion 61 also includes a first limiting portion 613 (for example, a limiting plate), and the first limiting portion 613 is arranged on the bottom wall of the first mounting portion 61 to limit the first filter assembly 420.

[0318] In some embodiments, as shown in Figures 53 and 54, the first mounting portion 61 also includes a seventh flange 614, which is arranged on the side wall or bottom wall of the first mounting portion 61 and extends from the side wall of the first mounting portion 61 toward the first filter assembly 612 to limit the first filter assembly 612.

[0319] In some embodiments, as shown in FIG. 51 and FIG. 52 , the second mounting portion 62 includes a fourth fixing portion 621 , which is obliquely disposed on a side wall of the second mounting portion 62 to obliquely fix the outdoor gas detection assembly 580 .

[0320] In some embodiments, as shown in FIG52 , the second mounting portion 62 further includes at least one second filter assembly 622. The at least one second filter assembly 622 is positioned on a side of the outdoor gas detection assembly 580 near the first air inlet 101 to filter the outdoor fresh air. For example, as shown in FIG52 , the at least one second filter assembly 622 includes a third sub-filter assembly 6221 (e.g., a coarse-efficiency filter) and a fourth sub-filter assembly 6222 (e.g., a medium-efficiency filter). The third sub-filter assembly 6221 is positioned obliquely on the side of the outdoor gas detection assembly 580 near the first air inlet 101, while the fourth sub-filter assembly 6222 is positioned obliquely on the side of the outdoor gas detection assembly 580 away from the first air inlet 101. This increases the contact area between the at least one second filter assembly 622 and the outdoor fresh air, achieving sufficient filtration of the outdoor fresh air. Furthermore, it prevents pollutants in the outdoor fresh air from affecting the heat exchange core 200 and the air intake fan 600, thereby ensuring the operational reliability of the heat exchange core 200 and the air intake fan 600.

[0321] It should be noted that the third sub-filter assembly 622 is tilted toward the first air inlet 101 , and the fourth sub-filter assembly 522 is also tilted toward the first air inlet 101 .

[0322] In some embodiments, as shown in FIG. 52 , the second mounting portion 62 further includes a second limiting portion 623 (eg, a limiting plate), which is disposed on the bottom wall of the second mounting portion 62 to limit the second filter assembly 622 .

[0323] In some embodiments, as shown in Figure 52, the second mounting portion 62 also includes an eighth flange 624, which is arranged on the side wall of the second mounting portion 62 and extends from the side wall of the second mounting portion 62 toward the second filter component 622 to limit the second filter component 622.

[0324] In some embodiments, as shown in Figure 51, the fresh air air conditioner 1 also includes an electrical control box 91, which is arranged in the installation cavity and is configured to control the components in the fresh air air conditioner 1, such as the indoor gas detection component 450 and the outdoor gas detection component 580.

[0325] In some embodiments, as shown in Figure 51 , the fresh air air conditioner 1 includes a first cover plate 460 and a second cover plate 540. The first cover plate 460 is disposed within the fourth sub-mounting cavity 1041, covering the first mounting portion 61. The second cover plate 540 is disposed within the third sub-mounting cavity 1011, covering the second mounting portion 62. The electrical control box 91 can be disposed above the first mounting portion 61 via the first cover plate 460, and can also be disposed above the second mounting portion 62 via the second cover plate 540.

[0326] It should be noted that the upper portion of the first mounting portion 61 is the end thereof close to the first plate 101 , and the upper portion of the second mounting portion 62 is the end thereof close to the first plate 101 .

[0327] In some embodiments, the sixth support portion 240 may be disposed on one of the second cover plate 540 and the first cover plate 460, and the fifth support portion 230 may be disposed on the other of the second cover plate 540 and the first cover plate 460. For example, as shown in FIG20 , the sixth support portion 240 is disposed on the first cover plate 460, and the fifth support portion 230 is disposed on the second cover plate 540.

[0328] In some embodiments, the indoor gas detection component 450 includes a first power supply terminal, a first signal transmitting terminal, a first signal receiving terminal RXD1, and a first communication address. The outdoor gas detection component 580 includes a second power supply terminal, a second signal transmitting terminal, a second signal receiving terminal RXD2, and a second communication address.

[0329] In some embodiments, the second communication address is different from the first communication address. The indoor gas detection component 450 and the outdoor gas detection component 530 use different communication addresses. After the MCU (Microcontroller Unit) of the electrical control box 91 recognizes them, the MCU acquires the respective gas parameters at different times, for example, as needed, to avoid communication conflicts.

[0330] In some embodiments, the first communication address of the indoor gas detection component 450 and the second communication address of the outdoor gas detection component 580 can be set, for example, by a DIP switch, where the DIP switch is an address switch that can be used for operation control.

[0331] In some embodiments, the electrical control box 91 includes a main control board configured to control the components of the fresh air air conditioner 1 to meet user needs. The main control board includes an MCU 916, a first power output circuit 917, a second power output circuit 918, a sensor receiving circuit 914, and a sensor transmitting circuit 915.

[0332] In some embodiments, as shown in FIG55 , the MCU916 includes a first control port P10, a second control port P11, a signal receiving port RXD, and a signal transmitting port TXD. The MCU916 is coupled to a first power output circuit 917 and a second power output circuit 918, respectively, to provide power to the indoor gas detection component 450 and the outdoor gas detection module 530. For example, the MCU916 is coupled to the first power output circuit 917 via the first control port P10 and to the second power output circuit 918 via the second control port P11. Furthermore, the MCU916 is connected to the sensor receiving circuit 914 and the sensor transmitting circuit 915, respectively, via a UART serial port (Universal Asynchronous Receiver / Transmitter), to enable communication between the MCU916 and the indoor gas detection component 450 and the outdoor gas detection module 530. For example, the MCU 916 is connected to the sensor receiving circuit 914 via the signal transmission port TXD (Transmit (tx) Data), and is connected to the sensor transmitting circuit 915 via the signal receiving port RXD (Receive (rx) Data).

[0333] In some embodiments, the first power output circuit 917 and the second power output circuit 918 may have the same circuit structure or different circuit structures.

[0334] In some embodiments, as shown in FIG. 56 , the input end of the first power output circuit 917 is connected to the first control port P10 , and the output end is connected to the first power supply end of the indoor gas detection component 450 .

[0335] The MCU 916 outputs a first control signal to the first power output circuit 917 through the first control port P10 to control the on / off of the circuit in the first power output circuit 917 . When the first power output circuit 917 is turned on, the indoor gas detection component 450 is powered on.

[0336] In some embodiments, the first power output circuit 917 includes a seventh switch control circuit and an eighth switch control circuit. The seventh switch control circuit includes an input terminal, an output terminal, and a control terminal. The control terminal of the seventh switch control circuit is connected to the first control port P10 of the MCU 916 and is configured to control the on / off state of the seventh switch control circuit. The seventh switch control circuit receives a first control signal output by the MCU 916 via the control terminal, thereby controlling the on / off state of the seventh switch control circuit according to instructions issued by the MCU 916.

[0337] The eighth switch control circuit includes an input terminal, an output terminal, and a control terminal. The control terminal of the eighth switch control circuit is connected to the output terminal of the seventh switch control circuit. The control terminal is configured to control the on / off operation of the eighth switch control circuit. The eighth switch control circuit is controlled to be on and off by the seventh switch control circuit. The output terminal of the eighth switch control circuit is connected to the first power supply terminal of the indoor gas detection component 450 to provide power to the indoor gas detection component 450.

[0338] In this way, the first power output circuit 917 can output electric energy to the first power supply terminal of the indoor gas detection component 450 by controlling the conduction of the seventh switch control circuit and the eighth switch control circuit.

[0339] In some embodiments, as shown in FIG. 56 , the input end of the second power output circuit 918 is coupled to the second control port P11 , and the output end is coupled to the second power supply end of the outdoor gas detection component 580 .

[0340] The MCU 916 outputs a second control signal to the second power output circuit 918 via the second control port P11 to control the on / off state of the circuit in the first power output circuit 917. When the second power output circuit 918 is on, the outdoor gas detection assembly 580 is powered on. In some embodiments, the second power output circuit 918 includes a ninth switch control circuit and a tenth switch control circuit. The ninth switch control circuit includes a control terminal coupled to the second control port P11 of the MCU 916 and configured to control the on / off state of the ninth switch control circuit. The ninth switch control circuit receives the second control signal output by the MCU 916 via the control terminal to control the on / off state of the ninth switch control circuit according to instructions issued by the MCU 916.

[0341] The control terminal of the tenth switch control circuit is connected to the output terminal of the ninth switch control circuit. The control terminal of the tenth switch control circuit is configured to control the on and off of the tenth switch control circuit. The output terminal of the tenth switch control circuit is connected to the second power supply terminal of the outdoor gas detection component 580 to provide power to the outdoor gas detection component 580.

[0342] In this way, the second power output circuit 918 can output electric energy to the second power supply terminal of the outdoor gas detection component 580 by controlling the conduction of the ninth switch control circuit and the tenth switch control circuit.

[0343] In some embodiments, the first power output circuit 917 and the second power output circuit 918 have the same circuit structure. As shown in Figures 57 and 58, when the first power output circuit 917 and the second power output circuit 918 have the same circuit structure, the MCU 916 controls the first power output circuit 917 to output power to power the indoor gas detection component 450, and controls the second power output circuit 918 to output power to power the outdoor gas detection component 580.

[0344] In some embodiments, the seventh switch control circuit includes a seventh switch element Q11. The seventh switch element Q11 is, for example, turned on at a high level. As shown in FIG57 , the seventh switch element Q11 is, for example, an NPN transistor Q11.

[0345] In some embodiments, the eighth switch control circuit includes an eighth switch element Q12. The eighth switch element Q12 is, for example, turned on at a low level. As shown in FIG57 , the eighth switch element Q12 is, for example, a PNP transistor Q12.

[0346] It should be noted that the seventh switching element Q11 and the eighth switching element Q12 each include an emitter, a base, and a collector, wherein the emitter is used to emit electrons, the base is used to control electrons, and the collector is used to collect electrons.

[0347] In some embodiments, the base of the seventh switch element Q11 includes a base current limiting resistor and a base pull-down resistor. The base of the seventh switch element Q11 is coupled to the first control port P10 via the base current limiting resistor. The seventh switch element Q11 is also grounded via the base pull-down resistor. The emitter of the seventh switch element Q11 is grounded.

[0348] In some embodiments, the first power output circuit 917 further includes a pull-up resistor, which includes a resistor R11 and a resistor R12, which are connected in series. One end of the resistor R11 is coupled to the collector of the seventh switching element Q11, and the other end is coupled to one end of the resistor R12. The other end of the resistor R12 is coupled to the power supply +5V.

[0349] A base of the eighth switching element Q12 is coupled to a location between the resistor R11 and the resistor R12 .

[0350] In some embodiments, the first power output circuit 917 further includes a pull-down resistor, including R13. The collector of the eighth switching element Q12 is coupled to the resistor R13, and the emitter thereof is coupled to the power supply +5V. The first power supply terminal 451 of the indoor gas detection component 450 is coupled to a position between the emitter of the eighth switching element Q12 and the resistor R13.

[0351] When the first control port P10 of MCU916 outputs a first level (for example, a high level), the seventh switch element Q11 of the seventh switch control circuit 321 is turned on, and the eighth switch element Q12 of the eighth switch control circuit 331 is also turned on. At this time, the +5V power supply is turned on to the first power supply terminal 451, and the indoor gas detection component 450 is powered on.

[0352] When the first control port P10 of MCU916 outputs a second level (for example, a low level), the seventh switch element Q11 is disconnected and the eighth switch element Q12 is also disconnected. At this time, the first power supply end 451 is at a low level, and the indoor gas detection component 450 is in an unpowered state.

[0353] It should be noted that, in some embodiments, the seventh switch element Q11 may also be a switch element that is turned on at a low level, and the eighth switch element Q12 may also be a switch element that is turned on at a high level.

[0354] In some embodiments, as shown in FIG58 , the structure of the second power output circuit 918 is similar to that of the first power output circuit 917 . However, unlike the first power output circuit 917 , the second power output circuit 918 includes a pull-up resistor and a pull-down resistor. The pull-up resistor includes a resistor R21 and a resistor R22 connected in series, and the pull-down resistor includes a resistor R23 . This disclosure does not elaborate on this.

[0355] In some embodiments, as shown in FIG. 59 and FIG. 60 , the sensor receiving circuit 914 includes a second input terminal, a first output terminal, and a second output terminal.

[0356] In some embodiments, as shown in Figure 59, the second input end of the sensor receiving circuit 914 is coupled to the signal sending port TXD of the MCU916, the first output end is coupled to the first signal receiving end RXD1 of the indoor gas detection component 450, and the second output end is coupled to the second signal receiving end RXD2 of the outdoor gas detection component 580.

[0357] When the main control board issues an instruction to obtain indoor return air gas parameters and / or outdoor fresh air gas parameters, the signal sending end TXD of MCU916 sends an addressed communication signal (for example, a square wave signal) to the sensor receiving circuit 914. The sensor receiving circuit 914 receives the communication signal through the input end, and transmits the communication signal to the indoor gas detection component 450 and the outdoor gas detection component 580 through the first output end and the second output end respectively, so that the indoor gas detection component 450 and the outdoor gas detection component 580 detect the indoor return air gas parameters and / or the outdoor fresh air gas parameters.

[0358] In some embodiments, the sensor receiving circuit 914 further includes a first switch control circuit, a second switch control circuit, and a third switch circuit.

[0359] The first switch control circuit includes a control terminal and an output terminal. The control terminal of the first switch control circuit is connected to the signal transmitting terminal TXD of the MCU 916 and is configured to control the on / off state of the first switch control circuit. The second switch control circuit includes a control terminal and an output terminal. The control terminal of the second switch control circuit is connected to the output terminal of the first switch control circuit and is configured to control the on / off state of the second switch control circuit. The output terminal of the second switch control circuit is coupled to the first signal receiving terminal RXD1. The third switch control circuit includes a control terminal and an output terminal. The control terminal of the third switch control circuit is coupled to the output terminal of the first switch control circuit and is configured to control the on / off state of the third switch control circuit. The output terminal of the third switch control circuit is coupled to the second signal receiving terminal RXD2.

[0360] In some embodiments, the first switch control circuit further includes a first switch element Q3. The first switch element Q3 is, for example, turned on at a high level. As shown in FIG59 , the first switch element Q3 is, for example, an NPN transistor Q3.

[0361] In some embodiments, the second switch control circuit further includes a second switch element Q4. The second switch element Q4 is, for example, turned on at a high level. As shown in FIG59 , the second switch element Q4 is, for example, an NPN transistor Q4.

[0362] In some embodiments, the third switch circuit further includes a third switch element Q5. The third switch element Q5 is, for example, turned on at a high level. As shown in FIG59 , the third switch element Q5 is, for example, an NPN transistor Q5.

[0363] It should be noted that the first switching element Q3 , the second switching element Q4 and the third switching element Q5 each include an emitter, a base and a collector.

[0364] In some embodiments, the base of the first switching element Q3 includes a base current-limiting resistor and a base pull-down resistor. The base of the first switching element Q3 is coupled to the signal transmitting terminal TXD via the base current-limiting resistor. The first switching element Q3 is also grounded via the base pull-down resistor. The emitter of the first switching element Q3 is grounded, and the collector is coupled to the power supply +5V via a resistor R11.

[0365] In some embodiments, the base of the second switching element Q4 includes a base current limiting resistor and a base pull-down resistor. The base of the second switching element Q4 is grounded through the base pull-down resistor, the emitter is grounded, and the collector is coupled to the power supply +5V through the resistor R12. The first signal receiving terminal RXD1 is coupled to the position where the emitter of the second switching element Q4 and the resistor R12 are connected.

[0366] The base current limiting resistor of the third switching element Q5 is coupled to a position between the resistor R11 and the collector of the first switching element Q3 .

[0367] In some embodiments, the base of the third switching element Q5 includes a base current limiting resistor and a base pull-down resistor. The base of the third switching element Q5 is grounded through the base pull-down resistor, the emitter is grounded, and the collector is coupled to the power supply +5V through the resistor R13. The second signal receiving terminal RXD2 is coupled to the position where the emitter of the third switching element Q5 and the resistor R13 are connected.

[0368] In some embodiments, as shown in FIG. 60 , the sensor transmitting circuit 915 includes a first input terminal, a third input terminal, and a third output terminal.

[0369] The first input terminal of the sensor sending circuit 915 is coupled to the first signal sending terminal TXD1 of the indoor gas detection component 450, the third input terminal is coupled to the second signal sending terminal TXD2 of the outdoor gas detection component 580, and the third output terminal is coupled to the signal receiving terminal RXD of the MCU916.

[0370] In some embodiments, the sensor transmitting circuit 915 further includes a fourth switch control circuit, a fifth switch control circuit, and a sixth switch circuit.

[0371] The fourth switch control circuit includes a control terminal and an output terminal. The control terminal of the fourth switch control circuit is coupled to the first signal transmitting terminal TXD1 and is configured to control the on / off state of the fourth switch control circuit. The fifth switch control circuit includes a control terminal and an output terminal. The control terminal of the fifth switch control circuit is coupled to the second signal transmitting terminal TXD2 and is configured to control the on / off state of the fifth switch control circuit. The sixth switch control circuit includes a control terminal and an output terminal. The control terminal of the sixth switch control circuit is coupled to the output terminal of the fourth switch control circuit and the output terminal of the fifth switch control circuit, respectively. The output terminal of the sixth switch control circuit is coupled to the signal receiving terminal RXD of the MCU 916.

[0372] In some embodiments, the fourth switch control circuit further includes a fourth switch element Q6. The fourth switch element Q6 is, for example, turned on at a high level. As shown in FIG60 , the fourth switch element Q6 is, for example, an NPN transistor Q6.

[0373] In some embodiments, the fifth switch control circuit further includes a fifth switch element Q7. The fifth switch element Q7 is, for example, turned on at a high level. As shown in FIG60 , the fifth switch element Q7 is, for example, an NPN transistor Q7.

[0374] In some embodiments, the sixth switch circuit further includes a sixth switch element Q8. The sixth switch element Q8 is, for example, turned on at a high level. As shown in FIG60 , the sixth switch element Q8 is, for example, an NPN transistor Q8.

[0375] It should be noted that the fourth switching element Q6 , the fifth switching element Q7 and the sixth switching element Q8 each include an emitter, a base and a collector.

[0376] In some embodiments, the base of the fourth switching element Q6 includes a base current limiting resistor and a base pull-down resistor. The base of the fourth switching element Q6 is coupled to the first signal transmitting terminal TXD1 via the base current limiting resistor. Furthermore, the fourth switching element Q6 is grounded via the base pull-down resistor. The emitter of the fourth switching element Q6 is grounded, and the collector is coupled to the first power supply terminal of the indoor gas detection assembly 450 via a resistor R21.

[0377] In some embodiments, the sensor transmitting circuit further includes a diode D1 (eg, a forward diode), and the base current limiting resistor of the sixth switch element Q8 is coupled to a position between the resistor R21 and the collector of the fourth switch element Q6 through the diode D1.

[0378] In some embodiments, the base of the fifth switching element Q7 includes a base current limiting resistor and a base pull-down resistor. The base of the fifth switching element Q7 is coupled to the second signal transmitting terminal TXD2 via the base current limiting resistor. Furthermore, the fifth switching element Q7 is grounded via the base pull-down resistor. The emitter of the fifth switching element Q7 is grounded, and the collector is coupled to the second power supply terminal of the outdoor gas detection assembly 580 via a resistor R22.

[0379] In some embodiments, the sensor transmitting circuit further includes a diode D2 (eg, a forward diode), and the base current limiting resistor of the sixth switch element Q8 is coupled to a position between the seventh resistor R22 and the collector of the fifth switch element Q7 through the diode D2.

[0380] In some embodiments, the base of the sixth switch element Q8 includes a base current limiting resistor and a base pull-down resistor. The base of the sixth switch element Q8 is grounded via the base pull-down resistor. The emitter of the sixth switch element Q8 is grounded, and the collector is coupled to a power supply +5V via a resistor R23. A signal receiving terminal RXD is coupled to the junction between the emitter of the sixth switch element Q8 and the resistor R23.

[0381] The main control board recognizes the address and can delay receiving data from different components according to the preset delay time to complete data reception of different components.

[0382] In some embodiments, as shown in Figure 56, the electrical control box 91 includes a first interface C11 and a second interface C12, and the first interface C11 and the second interface C12 are exposed on the surface of the electrical control box 91 to facilitate the coupling of the indoor gas detection component 450 and the outdoor gas detection component 580 with the MCU respectively.

[0383] In some embodiments, as shown in FIG56 , the first interface C11 includes a first terminal C11-1, a second terminal C11-2, a third terminal C11-3, and a fourth terminal C11-4. The first terminal C11-1 is grounded; the second terminal C11-2 is coupled to the first input terminal of the sensor transmitting circuit 915; the third terminal C11-3 is coupled to the first output terminal of the sensor receiving circuit 914; and the fourth terminal C11-4 is coupled to the output terminal of the first power output circuit 917.

[0384] When the main control board is coupled to the indoor gas detection component 450, the fourth terminal C11-4 is coupled to the first power supply terminal 451, the third terminal C11-3 is coupled to the first signal receiving terminal RXD1, the second terminal C11-2 is coupled to the first signal sending terminal TXD1, and the first terminal C11-1 is connected to the ground of the indoor gas detection component 450.

[0385] In some embodiments, as shown in FIG56 , the second interface includes a fifth terminal C12-1, a sixth terminal C12-2, a seventh terminal C12-3, and an eighth terminal C12-4. The fifth terminal C12-1 is grounded; the sixth terminal C12-2 is coupled to the third input terminal of the sensor transmitting circuit 915; the seventh terminal C12-3 is coupled to the second output terminal of the sensor receiving circuit 914; and the eighth terminal C12-4 is coupled to the output terminal of the second power output circuit 918.

[0386] When the main control board is connected to the outdoor gas detection component 580, the eighth terminal C12-4 is coupled to the second power supply end, the seventh terminal C12-3 is coupled to the second signal receiving end RXD2, the sixth terminal C12-2 is coupled to the second signal sending end TXD2, and the fifth terminal C12-1 is connected to the ground of the outdoor gas detection component 580.

[0387] In some embodiments, as shown in Figure 56, the indoor gas detection component 450 and the outdoor gas detection component 580 respectively include a first interface 360 ​​and a second interface 370, and the power supply and communication between the MCU 916 and the indoor gas detection component 450 and the outdoor gas detection component 580 can be completed by inserting the corresponding wiring harness into the first interface 360 ​​and the second interface 370.

[0388] The operator can inspect and repair components such as the electric control box 91 , the indoor gas detection module 450 , and the outdoor gas detection module 530 located next to the heat exchange core 200 through the first inspection port 131 .

[0389] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. A fresh air air conditioner, comprising: A housing having a mounting cavity and a first air inlet, a second air inlet, a first air outlet, and a second air outlet communicating with the mounting cavity; a first partition plate, disposed in the mounting cavity and connected to the housing, one end of the first partition plate being located between the first air inlet and the first air outlet, and the other end of the first partition plate being located between the second air outlet and the second air inlet; A compressor assembly, the compressor assembly comprising a compressor; A vibration reduction support assembly is arranged in the installation cavity, and the compressor is connected to the shell through the vibration reduction support assembly; as well as A second partition plate is disposed in the installation cavity, and the second partition plate is connected to the first partition plate and the shell respectively; Wherein, the installation cavity includes a first sub-installation cavity and a second sub-installation cavity; the first sub-installation cavity is connected to the second air outlet, and the second sub-installation cavity is connected to the first air outlet; The compressor assembly is disposed in the second sub-installation cavity and is spaced apart from the second air outlet, so that a soundproof cavity is formed between the second partition plate and the second air outlet.

2. The fresh air air conditioner according to claim 1, further comprising: A first buffer portion, the first buffer portion is disposed in the mounting cavity; Wherein, the other end of the second partition plate is connected to the shell through the first buffer portion.

3. The fresh air air conditioner according to claim 1 or 2, wherein: The compressor assembly further comprises a cover body and a refrigerant pipe group, wherein the cover body covers the compressor, and the refrigerant pipe group is connected to the compressor; The cover body includes a first opening, a second opening and a third opening; wherein the shell includes a first plate, a second plate and a third plate, the first plate, the second plate and the third plate jointly define the installation cavity, the second plate closes the first opening, the second partition plate closes the second opening, and the refrigerant pipe group is connected to the compressor through the third opening.

4. The fresh air air conditioner according to claim 3, wherein: The cover body also includes a main body and a noise reduction portion. The noise reduction portion is disposed on a surface of the main body close to the compressor and is configured to reduce noise generated by vibration of the compressor.

5. The fresh air air conditioner according to any one of claims 1 to 4, wherein: The vibration reduction support assembly comprises: a first support portion; A second supporting portion, wherein the first supporting portion and the second supporting portion are sequentially arranged along a direction perpendicular to the second plate of the housing; at least one third support portion, the third support portion being disposed on a side of the first support portion close to the compressor, the compressor being connected to the first support portion through the third support portion; and A fourth support portion is disposed on the second plate and is configured to position the vibration-damping support assembly and fix it to the housing.

6. The fresh air air conditioner according to claim 5, wherein: The vibration reduction support assembly also includes: at least one first vibration-damping portion, disposed at one end of the third supporting portion close to the first supporting portion, the third supporting portion being connected to the first supporting portion through the first vibration-damping portion; and At least one second vibration-damping portion is disposed on the second supporting portion, and the second vibration-damping portion extends toward the first supporting portion and abuts against the first supporting portion.

7. The fresh air air conditioner according to claim 5 or 6, wherein: The vibration reduction support assembly also includes: a second buffer portion, disposed between the first support portion and the second support portion; the second buffer portion includes at least one avoidance portion, the at least one avoidance portion cooperates with the second vibration reduction portion, and the second vibration reduction portion is connected to the first support portion through the avoidance portion; and The third buffer portion is disposed between the second support portion and the second plate of the shell.

8. The fresh air air conditioner according to any one of claims 5 to 7, wherein: The first supporting portion comprises: a water collecting portion extending toward the second supporting portion in a direction toward the flow guiding portion; The guide portion is connected to the water collecting portion, and one end of the guide portion away from the water collecting portion extends to above the water receiving tray; and A silencer portion protrudes from the bottom of the water collecting portion toward the third supporting portion.

9. The fresh air air conditioner according to any one of claims 1 to 8, further comprising a heat exchanger group, wherein the heat exchanger group is disposed in the installation cavity; the heat exchanger group comprises a first heat exchanger and a second heat exchanger; in, The first heat exchanger and the second heat exchanger are respectively connected to the first partition plate and arranged along the length direction of the shell; The connection between the first partition plate and the second partition plate is located at a position on the second partition plate where the first heat exchanger is disposed.

10. The fresh air air conditioner according to claim 9, wherein: The heat exchanger group further includes a third heat exchanger, which is arranged side by side with the first heat exchanger and is located at an air outlet end of the first heat exchanger; The third heat exchanger is configured to perform auxiliary heat exchange on the refrigerant flowing through the first heat exchanger.

11. The fresh air air conditioner according to claim 10, wherein: The heat exchanger group also includes: A first connection portion, disposed at both ends of the first heat exchanger along the length direction; The second connecting parts are arranged at two ends of the third heat exchanger along the length direction; The first heat exchanger is connected to the third heat exchanger through the first connection portion and the second connection portion.

12. The fresh air air conditioner according to any one of claims 9 to 11, further comprising a water receiving tray, the water receiving tray being disposed below the heat exchanger group and configured to collect condensed water formed by the second heat exchanger and the first heat exchanger; The water receiving tray comprises: A first water receiving area, located below the first heat exchanger; a second water receiving area, located below the second heat exchanger, and the bottom of the first water receiving area is farther away from the second plate of the shell than the bottom surface of the second water receiving area; The barrier is arranged between the first water receiving area and the second water receiving area, and is located between the first heat exchanger and the water receiving pan; the barrier includes a drainage channel, and the condensed water in the first water receiving area is discharged into the second water receiving area through the drainage channel.

13. The fresh air air conditioner according to any one of claims 1 to 12, further comprising: a heat exchange core, the heat exchange core being disposed in the installation cavity and located on a side of the first partition plate away from the second partition plate; Wherein, the two ends of the heat exchange core in the width direction of the shell are respectively connected to the third plate of the shell and the first partition plate; The installation cavity also includes a third sub-installation cavity and a fourth sub-installation cavity; wherein, the third sub-installation cavity is connected to the first air inlet, and the fourth sub-installation cavity is connected to the second air inlet; the heat exchange core includes at least two core assemblies, and the at least two core assemblies are arranged along a length direction perpendicular to the first partition plate, and the end faces of any two adjacent core assemblies among the at least two core assemblies are in contact.

14. The fresh air air conditioner according to claim 13, further comprising a connecting component, wherein the connecting component is disposed in the installation cavity; The heat exchange core is detachably connected to the third plate via the connecting assembly; in, The connection component comprises: A fifth support portion and a sixth support portion; the fifth support portion and the sixth support portion are arranged on a side of the first partition plate away from the compressor assembly, and are relatively parallel along the length direction of the shell; and The seventh support portion is arranged on the fifth support portion and the sixth support portion; both sides of the heat exchange core are connected to the connection assembly through the seventh support portion.

15. The fresh air air conditioner according to claim 14, wherein: The fifth supporting portion comprises: A first sub-support portion, comprising a first flange, wherein the first flange extends obliquely from the first sub-support portion toward a direction away from the second sub-support portion; and The second sub-support portion comprises a second flange, and the second flange extends obliquely from the second sub-support portion toward a direction away from the first sub-support portion; Wherein, the first sub-support portion and the second sub-support portion are arranged opposite to each other along the width direction of the first partition plate; The seventh supporting portion is formed between the first flange and the second flange.

16. The fresh air air conditioner according to claim 14, wherein: The sixth supporting portion includes a third sub-supporting portion; The fourth sub-support portion includes a fifth sub-support portion and a sixth sub-support portion, and the length of the fifth sub-support portion in a direction perpendicular to the first partition plate is greater than or equal to the length of any core assembly of the at least two core assemblies in a direction perpendicular to the first partition plate.

17. The fresh air air conditioner according to any one of claims 1 to 16, wherein: The housing further comprises: a first inspection port, the first inspection port being provided on a third plate of the housing; A first inspection cover is detachably arranged on the first inspection opening.

18. The fresh air air conditioner according to any one of claims 13 to 16, wherein: The housing comprises: A first inspection port, which is disposed below the heat exchange core and communicates with the third sub-installation cavity and the fourth sub-installation cavity on both sides of the heat exchange core; A first inspection cover is detachably arranged on the first inspection opening.

19. The fresh air air conditioner according to any one of claims 1 to 18, further comprising an eighth support portion, disposed in the installation cavity, the eighth support portion being connected to the inner surface of the second plate of the housing; and At least one ninth supporting portion is disposed in the mounting cavity and is disposed at a connection between two adjacent side plates of the third plate of the housing; One end of the at least one ninth supporting portion is fixedly connected to the eighth supporting portion.

20. The fresh air air conditioner according to claim 19, wherein: The at least one ninth support portion comprises: a seventh sub-support portion and an eighth sub-support portion, wherein the seventh sub-support portion and the eighth sub-support portion are arranged perpendicular to each other; A first overlapping portion, disposed at an end of the seventh sub-support portion away from the eighth sub-support portion and extending from the end toward the eighth sub-support portion, wherein the first overlapping portion is disposed parallel to the seventh sub-support portion; A second overlapping portion is provided at one end of the eighth sub-support portion away from the seventh sub-support portion and extends from the end toward the seventh sub-support portion, and the second overlapping portion is provided in parallel with the eighth sub-support portion; and The blocking portion is detachably connected to the first overlapping portion and the second overlapping portion, and is configured to block a side of the ninth supporting portion that faces the installation cavity.

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