Top air outlet type air conditioner outdoor unit

Abstract

The utility model discloses a top air outlet type air conditioner outdoor unit which comprises a machine shell comprising a base plate formed by splicing a first bottom plate and a second bottom plate. The outdoor heat exchanger is arranged on the base plate and defines a heat exchange space, and a notch is formed in the side wall of the outdoor heat exchanger and comprises a first notch section and a second notch section. The compressor is arranged in the heat exchange space, is arranged on the first bottom plate and is close to the first notch section; the gas-liquid separator is arranged on the second bottom plate and is close to the first bottom plate; the oil separator is arranged on the first bottom plate and located on the side, away from the first notch section, of the compressor. The stop valve is close to the first notch section relative to the gas-liquid separator, and the projection of the stop valve on the chassis is located on the second bottom plate; and the four-way valve is arranged on the side, away from the first notch section, of the stop valve, the height of the four-way valve is between the height of the stop valve and the height of the gas-liquid separator, reasonable layout of all parts of the outdoor unit in a limited space is achieved, and manufacturability and maintainability are both considered while the space utilization rate is increased.

Description

A top-discharge air conditioner outdoor unit Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a top-discharge type outdoor air conditioning unit. Background Technology

[0002] Top-discharge air conditioning outdoor units are a common type of air conditioning outdoor unit. In a top-discharge air conditioning outdoor unit, the outdoor air outlet is located at the top of the casing, the outdoor air inlet is located on the outer perimeter of the casing, the outdoor heat exchanger is installed along the height of the outdoor unit and extends along the inner peripheral wall of the casing, and the outdoor fan is located inside the casing and is positioned corresponding to the outdoor air outlet along the height of the casing. The outdoor heat exchanger is supported on the chassis of the casing, forming a semi-enclosed heat exchange space on the chassis, thus completing the function of heat exchange.

[0003] The current layout of top-discharge air conditioning outdoor units has several shortcomings. Firstly, while most outdoor units have a compact component layout, they fail to achieve a highly optimized configuration within a limited space. For example, the layout of key components such as the compressor, gas-liquid separator, oil separator, shut-off valve, and four-way valve often lacks effective overall planning, resulting in mutual obstruction and chaotic arrangement of components. Such a layout not only makes it difficult to further reduce the overall size of the unit but also increases transportation costs and installation space requirements. Secondly, the design and layout of outdoor heat exchangers also have limitations. Some existing technologies have limited heat exchange areas, making it difficult to improve heat exchange efficiency and meet the ever-increasing energy efficiency demands.

[0004] Furthermore, existing technologies have significant shortcomings in terms of ease of manufacturing and maintenance. The placement of some components is not rationally designed, causing considerable inconvenience during installation and prolonging the production cycle. During maintenance, the irrational component layout often makes it difficult for maintenance personnel to quickly and easily access faulty parts, increasing the difficulty and time cost of repairs. Simultaneously, the base plate design lacks innovation, resulting in high mold investment costs, which is detrimental to cost control and efficiency improvement.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore,

[0007] According to embodiments of this disclosure, a top-discharge air conditioning outdoor unit is provided, comprising:

[0008] The housing includes an outdoor air outlet and an outdoor air inlet, the outdoor air outlet being located on the top of the housing and the outdoor air inlet being located on the side wall of the housing, the housing including a chassis.

[0009] An outdoor fan is installed inside the casing, and the outdoor fan is located near the outdoor air outlet;

[0010] An outdoor heat exchanger is supported on the chassis and forms a semi-enclosed heat exchange space on the chassis. A notch communicating with the heat exchange space is provided on the circumferential sidewall of the outdoor heat exchanger. The notch includes:

[0011] The first notch segment is formed at one end in the width direction of the chassis;

[0012] The chassis is formed by splicing a first base plate and a second base plate arranged along the length of the chassis, and the splicing line between the first base plate and the second base plate is located on the center line of the chassis;

[0013] A compressor is located within the heat exchange space, and the compressor is placed on the first base plate and is located near the second base plate and the first notch section.

[0014] A gas-liquid separator is disposed on the second base plate and close to the first base plate, and the gas-liquid separator is disposed at the other end of the chassis in the width direction.

[0015] An oil separator is disposed on the first base plate and located on the side of the compressor away from the first notch section;

[0016] A shut-off valve is located near the first notch section, and the projection of the shut-off valve on the chassis is located on the second base plate.

[0017] A four-way valve is located on the side of the shut-off valve opposite to the first notch section. The projection of the four-way valve on the chassis is located on the second base plate. The height of the valve body of the four-way valve is greater than the height of the valve body of the shut-off valve, and the height of the valve body of the four-way valve is lower than the height of the gas-liquid separator.

[0018] The above technical solution has the following advantages or beneficial effects: The chassis is formed by splicing a first base plate and a second base plate, which can share most of the mold structure, reducing the number and cost of mold development and improving manufacturing efficiency. Based on the spliced ​​first and second base plates, the various components in the outdoor unit are rationally arranged, so that the compressor, shut-off valve, and four-way valve are relatively close to the first notch section, and present a layout that is lower in the front and higher in the back, with upper and lower layers, and no mutual obstruction, which improves space utilization, reduces wind resistance, and is more conducive to installation and maintenance.

[0019] According to embodiments of this disclosure, a plate heat exchanger is also included, mounted on the second base plate, the plate heat exchanger being located between the compressor and the shut-off valve, the plate heat exchanger being disposed near the first notch section and having a height lower than that of the four-way valve.

[0020] The above technical solution has the following advantages or beneficial effects: by centrally positioning the plate heat exchanger, the connecting pipelines to the compressor and shut-off valve are shortened, reducing refrigerant flow resistance. Simultaneously, the plate heat exchanger's location near the first notch section facilitates quick disassembly and assembly during maintenance, improving maintainability.

[0021] According to embodiments of this disclosure, the shut-off valve includes:

[0022] The first gas-side shut-off valve is located on the first gas pipe that connects the outdoor unit of the air conditioner to the outside.

[0023] The second gas-side shut-off valve is located on the second gas pipe that connects the outdoor unit of the air conditioner to the outside.

[0024] A liquid-side shut-off valve is installed on the liquid pipe that connects the outdoor unit of the air conditioner to the outside.

[0025] The above technical solution has the following advantages or beneficial effects: by setting two gas-side shut-off valves, the outdoor unit of the air conditioner can be a multi-pipe outdoor unit, which can connect to at least two indoor units of different types at the same time, thereby enhancing the multi-functional adaptability of the system and meeting the needs of diverse usage scenarios.

[0026] According to embodiments of this disclosure, the shut-off valve further includes;

[0027] The hydraulic module shut-off valve has one end connected to the exhaust port of the compressor and the other end connected to the hydraulic module.

[0028] The above technical solution has the following advantages or beneficial effects: by adding a hydraulic module shut-off valve, the air conditioning system and the hydraulic module can be linked to realize the hot water supply function, expand the application range of the unit, and improve the overall energy utilization efficiency.

[0029] According to embodiments of this disclosure, the four-way valve includes:

[0030] The first four-way valve is connected to the compressor, the outdoor heat exchanger, and the first gas pipe, and is used to control the outdoor heat exchanger to be used as a condenser or an evaporator.

[0031] The second four-way valve is connected to the compressor, the first four-way valve, and the second gas pipe, and is used to control the heating of at least two indoor air conditioning units.

[0032] The first four-way valve and the second four-way valve are spaced apart along the length of the chassis. The second four-way valve is closer to the compressor than the first four-way valve, and the height of the valve body of the second four-way valve is lower than the height of the valve body of the first four-way valve.

[0033] The above technical solution has the following advantages or beneficial effects: the first four-way valve and the second four-way valve cooperate to control the refrigerant flow direction and support complex operating condition switching. The staggered design of the first four-way valve and the second four-way valve avoids obstruction between valve bodies, optimizes airflow channels, and reduces wind resistance.

[0034] According to an embodiment of this disclosure, the valve body of the first four-way valve extends along the width direction of the chassis, and the valve body of the second four-way valve extends along the length direction of the chassis.

[0035] The above technical solution has the following advantages or beneficial effects: the above setting fully considers the spatial layout of the chassis, so that the valve body of the four-way valve can be reasonably placed in a limited space, further improving the space utilization rate and avoiding interference between components.

[0036] According to an embodiment of this disclosure, the notch further includes a second notch segment located at the end of the second base plate away from the first base plate; the width of the projection range of the compressor and the valve body of the shut-off valve on the chassis is smaller than the width of the second notch segment.

[0037] The above technical solution has the following advantages or beneficial effects: by setting a second gap section, not only is it ensured that the air flows smoothly in the heat exchange space, reducing airflow obstruction and improving heat exchange efficiency, but it also provides additional space for maintenance operations and improves maintainability.

[0038] According to an embodiment of this disclosure, the outdoor heat exchanger includes a heat exchanger body and a refrigerant pipe assembly. The refrigerant pipe assembly is connected to a heat exchange tube inside the heat exchanger body to allow the refrigerant to enter and exit the heat exchange tube. The projection of the refrigerant pipe assembly on the chassis is located on the second base plate and on the side of the four-way valve away from the first base plate.

[0039] The above technical solution has the following advantages or beneficial effects: the above arrangement allows the refrigerant pipe assembly to be located between the four-way valve and one end of the outdoor heat exchanger, shortening the pipe length, reducing pipe costs, reducing pipe bends, and reducing refrigerant flow resistance.

[0040] According to embodiments of this disclosure, the outdoor unit of a top-discharge air conditioner further includes a refrigerant heat dissipation module, which is located above the shut-off valve and connected to the plate heat exchanger.

[0041] The above technical solution has the following advantages or beneficial effects: by setting up a refrigerant heat dissipation module, the cooling capacity of the refrigerant can be used for heat dissipation, thereby realizing the heat dissipation of the outdoor unit's electrical control box and improving heat dissipation efficiency.

[0042] According to embodiments of this disclosure, a top-discharge air conditioning outdoor unit is also provided, comprising:

[0043] The housing includes an outdoor air outlet and an outdoor air inlet, the outdoor air outlet being located on the top of the housing and the outdoor air inlet being located on the side wall of the housing, the housing including a chassis.

[0044] An outdoor fan is installed inside the casing, and the outdoor fan is located near the outdoor air outlet;

[0045] An outdoor heat exchanger is supported on the chassis and forms a semi-enclosed heat exchange space on the chassis. A notch communicating with the heat exchange space is provided on the circumferential sidewall of the outdoor heat exchanger. The notch includes:

[0046] The first notch segment is formed at one end in the width direction of the chassis;

[0047] A compressor is located within the heat exchange space, and the compressor is placed on the chassis and positioned near the first notch section.

[0048] A gas-liquid separator is mounted on the chassis, with the gas-liquid separator located at the other end of the chassis in the width direction.

[0049] An oil separator is mounted on the chassis and located on the side of the compressor away from the first notch section;

[0050] The shut-off valve is positioned relative to the gas-liquid separator and close to the first notch section.

[0051] A four-way valve is located on the side of the shut-off valve opposite to the first notch section, and the height of the four-way valve body is greater than the height of the shut-off valve body.

[0052] The compressor and the oil separator are located on one side of the centerline in the width direction of the chassis, while the gas-liquid separator, the shut-off valve, and the four-way valve are located on the other side of the centerline. The compressor and the gas-liquid separator are arranged close to the centerline.

[0053] The above technical solution has the following advantages or beneficial effects: It allows for a rational layout of the compressor, gas-liquid separator, oil separator, four-way valve, and shut-off valve within a limited space, improving space utilization, reducing overall machine size, and lowering transportation safety and installation space requirements. Furthermore, placing critical components at openings not only reduces wind resistance but also facilitates installation and maintenance, reducing maintenance time and costs. Attached Figure Description

[0054] Figure 1 is an external view of the outdoor unit of the top-discharge air conditioner according to an embodiment of the present disclosure;

[0055] Figure 2 is a cross-sectional view of the outdoor unit of a top-discharge air conditioner according to an embodiment of the present disclosure;

[0056] Figure 3 is a schematic diagram of the assembly of the outdoor heat exchanger and the chassis according to an embodiment of the present disclosure;

[0057] Figure 4 is a top view of the assembly of the outdoor heat exchanger and the chassis according to an embodiment of the present disclosure;

[0058] Figure 5 is an assembly diagram of the outdoor heat exchanger and chassis according to another embodiment of the present disclosure;

[0059] Figure 6 is a schematic diagram of the internal structure of the outdoor unit of a top-discharge air conditioner according to another embodiment of the present disclosure;

[0060] Figure 7 is a schematic diagram of the internal structure of the outdoor unit of the top-discharge air conditioner according to an embodiment of the present disclosure, omitting the connecting pipes;

[0061] Figure 8 is a structural schematic diagram of Figure 7 from another perspective;

[0062] Figure 9 is a top view of Figure 7;

[0063] Figure 10 is a structural schematic diagram of the outdoor unit of a top-discharge air conditioner according to an embodiment of the present disclosure.

[0064] In the above figures:

[0065] Top-discharge air conditioner outdoor unit 100; casing 1; outdoor air inlet 11; outdoor air outlet 12; top cover 13; chassis 14; first base plate 1411; second base plate 142; mounting part 143; side plate 15; air outlet hood 16; electronic expansion valve 17; throttling device 18; outdoor fan 19; outdoor heat exchanger 2; heat exchanger body 21; refrigerant pipe assembly 22; heat exchange space 23; first notch section 31; second notch section 3 2; Outdoor fan 19; Compressor 4; Gas-liquid separator 5; Oil separator 6; Shut-off valve 7; First gas-side shut-off valve 71; Second gas-side shut-off valve 72; Liquid-side shut-off valve 73; Hydraulic module shut-off valve 74; Four-way valve 8; First four-way valve 81; Second four-way valve 82; Plate heat exchanger 9; First gas pipe 101; Second gas pipe 102; Third gas pipe 103; Liquid pipe 104; Refrigerant heat dissipation module 105; Silencer 106. Detailed Implementation

[0066] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0067] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0068] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0069] The terms “include” and “have”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0070] The top-discharge air conditioner outdoor unit provided in this application can have various implementation forms. Figures 1 to 10 show one specific embodiment of the top-discharge air conditioner outdoor unit of this application. In this embodiment, the top-discharge air conditioner outdoor unit serves as the outdoor unit of the air conditioner, used to carry indoor heat to the outside.

[0071] As shown in Figure 1, the top-discharge air conditioner outdoor unit provided in this application may include a housing 1. The housing 1 is installed outdoors, and the housing 1 forms the overall appearance of the air conditioner outdoor unit 100.

[0072] The housing 1 defines an installation cavity for installing and securing various components of the outdoor unit 100 of the air conditioner. Referring to Figure 1, the housing 1 has a top and a bottom, which are opposite ends of the housing 1 in the height direction.

[0073] The housing 1 may include an outdoor air outlet 12, which is located at the top of the housing 1. The outdoor air outlet 12 communicates with the mounting cavity and serves as an outlet for the heat-exchanged air to flow out from inside the housing 1.

[0074] The housing 1 may include an outdoor air inlet 11, which is located on the side wall of the outer periphery of the housing 1. The outdoor air inlet 11 communicates with the mounting cavity and serves as the inlet for external air to flow into the housing 1.

[0075] Referring to Figures 1 and 2, in this embodiment, the air outlet 12 is arranged to intersect with the air inlet 11.

[0076] As shown in Figure 1, the housing 1 may include a top cover 13, which is located at the top of the housing 1, and an outdoor air inlet 11 is formed on the top cover 13. In this embodiment, the outdoor air outlet 12 is rectangular.

[0077] Of course, in some other embodiments, the outdoor air outlet 12 may be circular and the outdoor air outlet 12 may be positioned opposite to the outdoor fan 19.

[0078] Referring again to Figure 1, the housing 1 may include a side panel 15, which surrounds the edge of the top cover 13. As shown in Figure 2, the side panel 15 is located below the top cover 13, and the outdoor air inlet 11 is opened on the side panel 15.

[0079] The top cover 13 can be detachably connected to the side plate 15 by means of bolts or screws.

[0080] In some embodiments, the top cover 13 is connected to an air guide ring, which is located at the outdoor air outlet 12.

[0081] The air guide ring internally defines a cavity extending along the height direction of the housing 1. The impeller of the outdoor fan 19 is located within the cavity. The air guide ring is used to guide the airflow within the installation cavity, enabling the outdoor fan 19 to better perform its air guiding function.

[0082] In some embodiments, the air guide ring can be integrally formed with the top cover 13 to facilitate the manufacturing and assembly of the outdoor unit of the air conditioner.

[0083] As shown in Figure 1, an air outlet shroud 16 is connected to the casing 1. The air outlet shroud 16 is located at the air outlet 12 and covers the outside of the air guide ring. The air outlet shroud 16 can guide the airflow to be discharged in a specific direction. By optimizing the airflow path, the air outlet shroud 16 ensures that the heat exchange air discharged by the air conditioner can be quickly dispersed, reducing the energy loss during the operation of the outdoor unit 100 of the air conditioner and improving the performance and energy efficiency of the air conditioning system.

[0084] In some embodiments of this application, the outdoor unit 100 of the air conditioner may include an outdoor fan 19. The outdoor fan 19 is disposed in the mounting cavity and is used to drive outdoor air outside the housing 1 into the mounting cavity through the outdoor air inlet 11, and drive the air in the mounting cavity to flow along the outdoor air inlet 11 toward the outdoor air outlet 12.

[0085] The outdoor fan 19 is correspondingly installed with the outdoor air outlet 12. Referring to Figure 2, the outdoor fan 19 is located inside the outdoor air outlet 12.

[0086] Outdoor fan 19 can be an axial flow fan. When an axial flow fan is used in the outdoor unit 100 of an air conditioner, its low aerodynamic noise and high air volume can improve the performance of the outdoor unit, thereby improving the performance of the entire air conditioning system.

[0087] The housing 1 may include a chassis 14, which is disposed opposite to the top cover 13 along the height direction of the housing 1. The chassis 14 is connected to the lower part of the side plate 15, and the chassis 14, the side plate 15 and the top cover 13 together define and enclose a mounting cavity.

[0088] In some embodiments of this application, referring to FIG4, the chassis 14 is formed by splicing a first base plate 141 and a second base plate 142 arranged along the length of the chassis 14. The splicing line between the first base plate 141 and the second base plate 142 is located on the centerline of the chassis 14. The first base plate 141 and the second base plate 142 can be connected by screw-like fasteners.

[0089] In this embodiment, the first base plate 141 and the second base plate 142 have basically the same shape, with only a slight difference in the installation position of the shut-off valve 7. Some molds can be shared during the manufacturing process, reducing the mold investment cost during the development process.

[0090] The chassis 14 is formed by splicing the first base plate 141 and the second base plate 142 arranged along the length direction, which provides a basis for the layout or balanced distribution of subsequent components, making the layout of the entire system components more regular and compact, avoiding mutual interference between components, and improving the coordination and rationality of the overall structure.

[0091] In some embodiments, the first base plate 141 and the second base plate 142 are sheet metal parts, which not only gives the chassis 14 high strength, but also reduces the production cost of the chassis 14.

[0092] In some embodiments of this application, as shown in FIG2, the outdoor unit of the top-discharge air conditioner may include an outdoor heat exchanger 2, which is disposed in the mounting cavity for heat exchange with the air inside the casing 1.

[0093] Referring to Figures 1 and 3, the outdoor heat exchanger 2 is supported on the chassis 14 and is positioned close to the outdoor air inlet 11. The outdoor heat exchanger 2 is installed inside the outdoor air inlet 11 to facilitate heat exchange with the outdoor air entering the mounting cavity through the outdoor air inlet 11.

[0094] The outdoor heat exchanger 2 extends along the inner peripheral wall of the casing 1 within the mounting cavity to increase the heat exchange area of ​​the outdoor heat exchanger 2 within the mounting cavity, thereby increasing the heat exchange effect of the outdoor heat exchanger 2.

[0095] Referring to Figures 4 and 5, the outdoor heat exchanger 2 forms a semi-enclosed heat exchange space 23 on the chassis 14. A notch communicating with the heat exchange space 23 is provided on the circumferential side wall of the outdoor heat exchanger 2. That is, in this embodiment, the outdoor heat exchanger 2 is a type G heat exchanger.

[0096] In some embodiments of this application, the outdoor heat exchanger 2 is integrally formed, making its pipeline structure compact, improving the overall manufacturing efficiency and reducing manufacturing costs.

[0097] In some embodiments of this application, referring to FIG5, the chassis 14 is provided with an upwardly protruding mounting portion 143 for providing mounting positions for the outdoor heat exchanger 2, compressor 4, gas-liquid separator 5, oil separator 6, plate heat exchanger 9, etc., to avoid being affected by condensate.

[0098] Referring to Figure 4, the notch may include a first notch segment 31, which is located at one end of the chassis 14 in the width direction. Specifically, the first notch segment 31 is located on the front side of the outdoor heat exchanger 2.

[0099] It should be noted that the directions described in the text are based on the direction the user faces when facing the outdoor unit of the air conditioner. Specifically, the side of the outdoor unit facing the user when in use is defined as the front side, and the opposite side is defined as the rear side. The left and right sides are distinguished by the direction the user faces when facing the outdoor unit.

[0100] Referring to Figure 6, the top-discharge air conditioner outdoor unit 100 may include a compressor 4, which is located in the heat exchange space 23 within the casing 1. The compressor 4 is mounted on the chassis 14 and positioned below the outdoor fan 19.

[0101] Referring to Figure 7, the compressor 4 is placed on the first base plate 141 and positioned close to the second base plate 142. That is, the compressor 4 is positioned close to the aforementioned centerline. This arrangement ensures that the compressor 4 is approximately centered, preventing excessive lateral shift of the unit's center of gravity from affecting transportation safety.

[0102] By setting the first notch section 31, operating space can be reserved to facilitate manufacturing and maintenance. Referring to Figures 4 and 7, the compressor 4 is positioned close to the first notch section 31, allowing for installation and maintenance of the compressor 4 through the first notch section 31, ensuring maintainability.

[0103] An air conditioner may include an indoor unit, also known as an indoor air conditioning unit, which is installed indoors and used for heat exchange with the indoor environment. The indoor air conditioning unit includes an indoor heat exchanger.

[0104] The air conditioner may include a throttling device 18 for flow control. The throttling device 18 may be located in the indoor unit of the air conditioner or in the outdoor unit 100 of a top-discharge air conditioner.

[0105] An air conditioner may include a refrigerant circuit. A refrigerant circuit is formed by connecting pipes between the indoor unit and the top-discharge outdoor unit 100 of the air conditioner to circulate the refrigerant. Through this refrigerant circuit, the air conditioner allows the refrigerant to circulate sequentially through the compressor 4, condenser, throttling device 18, and evaporator, enabling it to perform indoor cooling or heating. The indoor heat exchanger and outdoor heat exchanger 2 serve as either condensers or evaporators.

[0106] The refrigeration and heating cycles include compression, condensation, expansion, and evaporation processes. By absorbing and releasing heat through the refrigerant, they provide cooling or heating to the indoor space, thereby regulating the indoor temperature.

[0107] Compressor 4 compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas, which then flows into the condenser.

[0108] The condenser condenses the compressed, high-temperature, high-pressure gaseous refrigerant into liquid refrigerant, and the heat is released into the surrounding environment through the condensation process.

[0109] The liquid refrigerant flowing out of the condenser enters the throttling device 18, which expands the high-temperature and high-pressure liquid refrigerant after condensation in the condenser into a low-pressure liquid refrigerant.

[0110] The low-pressure liquid refrigerant flowing out from the throttling device 18 enters the evaporator. When the liquid refrigerant flows through the evaporator, it absorbs heat and evaporates into low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas returns to the compressor 4.

[0111] The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout this entire cycle, the air conditioner regulates the temperature of the indoor space.

[0112] In some embodiments of this application, the top-discharge outdoor unit 100 of the air conditioner may include a gas-liquid separator 5. The gas-liquid separator 5 is connected to the suction port of the compressor 4.

[0113] By setting up the gas-liquid separator 5, the refrigerant gas and liquid can be effectively separated, preventing the occurrence of liquid slugging in the compressor 4, protecting the compressor 4 from damage, and improving the reliability and service life of the compressor 4.

[0114] The gas-liquid separator 5 is mounted on the second base plate 142, and the gas-liquid separator 5 is located at the other end of the chassis 14 in the width direction.

[0115] Referring to Figure 9, the gas-liquid separator 5 is located in the middle of the unit, slightly to the right and rear. It works in conjunction with the compressor 4 to prevent the center of gravity of the outdoor unit from shifting too much to the left or right, thus improving transportation safety.

[0116] Referring to Figure 9, the gas-liquid separator 5 is positioned close to the first base plate 141, which optimizes space utilization, helps to shorten the connection pipeline between the gas-liquid separator 5 and the compressor 4, reduces refrigerant flow resistance, and improves separation efficiency.

[0117] The top-discharge air conditioner outdoor unit 100 may include an oil separator 6. The oil separator 6 is connected to the exhaust port of the compressor 4.

[0118] The oil separator 6 can separate the lubricating oil in the refrigerant discharged from the compressor 4 and return it to the compressor 4, ensuring that the compressor 4 has enough lubricating oil for lubrication and cooling, preventing damage to the compressor 4 due to insufficient lubricating oil, and improving the working efficiency and reliability of the compressor 4.

[0119] Referring to Figure 9, the oil separator 6 is mounted on the first base plate 141 and located on the side of the compressor 4 away from the first notch section 31. That is, the oil separator 6 is located on the rear side of the compressor 4.

[0120] By placing the oil separator 6 behind the compressor 4, the length of the connecting pipeline can be shortened, reducing pipeline costs, while also reducing the backflow resistance of lubricating oil in the pipeline and improving the lubricating oil return efficiency.

[0121] The top-discharge air conditioner outdoor unit 100 may include a shut-off valve 7, which is used to connect the outdoor unit to the outside.

[0122] The shut-off valve 7 provides reliable control over the external connection of the outdoor unit, facilitating the connection and coordinated operation of the outdoor unit with other air conditioning system components (such as the indoor unit, hydraulic module, etc.). At the same time, when repairing or replacing parts, closing the shut-off valve 7 can effectively isolate the system and ensure the safe conduct of maintenance work.

[0123] Referring to Figure 9, the projection of the shut-off valve 7 on the chassis 14 is located on the second base plate 142, and the shut-off valve 7 is closer to the first notch section 31 relative to the gas-liquid separator 5.

[0124] In this embodiment, the shut-off valve 7 is positioned close to the first notch section 31, making the shut-off valve 7 inside the outdoor unit closer to the interface area for external connection. This facilitates external pipe connection operations, reduces the length and complexity of the connection pipeline, and lowers the difficulty and cost of installation and maintenance.

[0125] The top-discharge air conditioner outdoor unit 100 may include a four-way valve 8, which is used to switch the refrigerant flow direction so that the air conditioning system has at least two working modes: cooling and heating.

[0126] The four-way valve 8 is located on the side of the shut-off valve 7 away from the first notch section 31, and the projection of the four-way valve 8 on the chassis 14 is located on the second base plate 142.

[0127] The four-way valve 8 is located between the gas-liquid separator 5 and the shut-off valve 7, so that the four-way valve 8 is roughly in the middle of the air conditioning unit, which can avoid obstruction by the electrical box.

[0128] In this embodiment, the height of the valve body of the four-way valve 8 is greater than the height of the valve body of the shut-off valve 7, and the height of the valve body of the four-way valve 8 is lower than the height of the gas-liquid separator 5.

[0129] In other words, the height of the four-way valve 8 is between the valve body of the shut-off valve 7 and the gas-liquid separator 5. This arrangement allows the various air conditioning components on the second base plate 142 to have a front-low and back-high, layered layout that does not obstruct each other, improving space utilization, reducing wind resistance, and making installation and maintenance more convenient.

[0130] In this embodiment, the compressor 4, oil separator 6, gas-liquid separator 5, four-way valve 8, and shut-off valve 7 are rationally arranged in conjunction with the gap of the outdoor heat exchanger 2 within a limited space. This approach balances manufacturability and maintainability while improving the compactness of the piping system structure and reducing the overall size of the unit. This not only saves on transportation costs but also reduces the installation space requirements of the top-discharge air conditioner outdoor unit 100.

[0131] In some embodiments of this application, referring to FIG9, the top-discharge air conditioner outdoor unit 100 may be a plate heat exchanger 9.

[0132] The plate heat exchanger 9 may include a first refrigerant flow path, which is connected in series with the outdoor heat exchanger 2. During cooling, after the refrigerant has undergone heat exchange in the outdoor heat exchanger 2, it continues to flow through the plate heat exchanger 9 for secondary heat exchange.

[0133] Referring to Figure 10, the plate heat exchanger 9 may include a second refrigerant flow path. One end of the second refrigerant flow path is connected to the end of the first refrigerant flow path away from the outdoor heat exchanger 2 via an electronic expansion valve 17. The other end of the second refrigerant flow path can be connected to the suction port of the compressor 4 via a silencer 106, or directly connected to the suction port of the compressor 4 via a gas-liquid separator 5.

[0134] The above configuration allows the refrigerant to return directly to the suction port of the compressor 4 after heat exchange in the plate heat exchanger 9, forming a closed loop. This ensures efficient recycling of the refrigerant and helps stabilize the suction state of the compressor 4, improving the working efficiency of the compressor 4 and the operational stability of the system.

[0135] In this embodiment, the plate heat exchanger 9 can be used as an evaporator or as a heat exchanger. It can function as an evaporator together with the outdoor heat exchanger 2, or as a condenser together, or one can be a condenser and the other an evaporator, to meet the cooling and heating needs of different usage scenarios, enhance the overall performance and functional versatility of the outdoor unit, and improve the heat exchange efficiency of the air conditioning system.

[0136] The plate heat exchanger 9 is installed on the second base plate 142, and the plate heat exchanger 9 is positioned relative to the gas-liquid separator 5 near the first notch section 31, which facilitates the installation, maintenance and repair of the pipeline. The plate heat exchanger 9 can be quickly disassembled and assembled during maintenance, improving maintainability.

[0137] Referring again to Figure 9, the plate heat exchanger 9 is located between the compressor 4 and the shut-off valve 7. By utilizing the empty space between the compressor 4 and the shut-off valve 7 to arrange the plate heat exchanger 9, not only is the space of the chassis 14 saved, but the connection distance between the plate heat exchanger 9 and the compressor 4 and the shut-off valve 7 is also shortened, reducing the refrigerant flow resistance.

[0138] Furthermore, the height of the plate heat exchanger 9 is set lower than that of the four-way valve 8, which can avoid obstructing the four-way valve 8 and affecting its installation and maintenance, thus improving the rationality of the overall layout.

[0139] In some embodiments of this application, referring to FIG10, the shut-off valve 7 may include a first gas-side shut-off valve 71, which is disposed on the first gas pipe 101 that connects the outdoor unit of the air conditioner to the outside.

[0140] In this embodiment, the first gas pipe 101 can be independently controlled by the first gas-side shut-off valve 71 to achieve precise adjustment of the cooling / heating mode switching, while isolating the outdoor side pipe from the indoor side pipe, which is convenient for maintenance or system vacuuming.

[0141] The shut-off valve 7 may include a second gas-side shut-off valve 72, which is located on the second gas pipe 102 that connects the outdoor unit of the air conditioner to the outside.

[0142] The second gas-side shut-off valve 72 has the same function as the first gas-side shut-off valve 71. By adding the second gas-side shut-off valve 72, the expansion needs of multi-split units or complex systems can be supported, and the adaptability of the outdoor unit can be improved.

[0143] In this embodiment, by setting two gas-side shut-off valves 7, the outdoor unit of the air conditioner is a multi-pipe outdoor unit. This outdoor unit can connect to at least two indoor units of different types at the same time, which enhances the multi-functional adaptability of the system and meets the needs of diverse usage scenarios.

[0144] The shut-off valve 7 may include a liquid-side shut-off valve 73, which is located on the liquid pipe 104 connecting the outdoor unit of the air conditioner to the outside. The liquid pipe 104 can be connected to the indoor unit and the hydraulic module. By setting the liquid-side shut-off valve 73, the flow of liquid refrigerant can be independently controlled, and in conjunction with the gas valve, high and low pressure sides of the system can be separated for management, improving operational safety.

[0145] It is understandable that the top-discharge outdoor unit and any indoor unit, as well as the hydraulic module, are connected via gas pipes and liquid pipes 104.

[0146] Furthermore, the shut-off valve 7 may include a hydraulic module shut-off valve 74, one end of which is connected to the exhaust port of the compressor 4 via a pipeline, and the other end is connected to the hydraulic module via a pipeline. In this embodiment, the hydraulic module shut-off valve 74 is disposed on the third gas pipe 103 connected to the hydraulic module.

[0147] It is understandable that the hydraulic module may include a hot water exchange tank. This hot water exchange tank has a refrigerant flow path, which can be connected to the refrigerant circulation loop of the air conditioning system. The hot water exchange tank also has a water flow path, which is connected to the water-using side via an outlet pipe and a return pipe.

[0148] The hydraulic module shut-off valve 74 can control the opening and closing of the pipeline between the hydraulic module and the compressor 4. In this embodiment, by adding the hydraulic module shut-off valve 74, the linkage between the air conditioning system and the hydraulic module can be realized, the hot water supply function can be realized, the application range of the unit can be expanded, and the overall energy utilization efficiency can be improved.

[0149] In some embodiments, a filter is provided between the plate heat exchanger 9 and the liquid-side shut-off valve to filter impurities in the refrigerant.

[0150] In some embodiments of this application, the four-way valve 8 may include a first four-way valve 81, which is connected to the compressor 4, the outdoor heat exchanger 2, and the first gas pipe 101, and is used to control the outdoor heat exchanger 2 to be used as a condenser or an evaporator.

[0151] Furthermore, the first four-way valve 81 can be connected to the hydraulic module shut-off valve 74.

[0152] Specifically, referring to Figure 10, the D port of the first four-way valve 81 is connected to one end of the hydraulic module shut-off valve 74 and the exhaust port of the compressor 4, the S port of the first four-way valve 81 is connected to the suction port of the compressor 4, the C port of the first four-way valve 81 is connected to the outdoor heat exchanger 2, and the E port of the first four-way valve 81 is connected to the first air pipe 101 and connected to one end of the first air-side shut-off valve 71 through the first air pipe 101.

[0153] The four-way valve 8 may include a second four-way valve 82, which is connected to the compressor 4, the first four-way valve 81, and the second gas pipe 102, and is used to control the heating of at least two indoor air conditioning units.

[0154] Referring to Figure 10, the D port of the second four-way valve 82 is connected between the D port of the first four-way valve 81 and the exhaust port of the compressor 4. The C port of the second four-way valve 82 is connected to the second air pipe 102 and then to the second air-side shut-off valve 72. The S port of the second four-way valve 82 and the E port of the second four-way valve 82 are short-circuited by a capillary tube and connected to the suction port of the compressor 4.

[0155] In this embodiment, the first four-way valve 81 and the second four-way valve 82 cooperate with each other to flexibly switch the refrigerant flow direction according to the operating requirements of the air conditioning system, realize the conversion of multiple operating modes, and improve the adaptability and multifunctionality of the system.

[0156] Furthermore, the first four-way valve 81 and the second four-way valve 82 are spaced apart along the length of the chassis 14. The second four-way valve 82 is closer to the compressor 4 than the first four-way valve 81, and the height of the valve body of the second four-way valve 82 is lower than the height of the valve body of the first four-way valve 81.

[0157] In this embodiment, the positions of the first four-way valve 81 and the second four-way valve 82 are reasonably set to reduce pipeline bends. At the same time, the staggered height design of the first four-way valve 81 and the second four-way valve 82 avoids obstruction between valve bodies, reduces air resistance, and facilitates maintenance.

[0158] In some embodiments of this application, the valve body of the first four-way valve 81 extends along the width direction of the chassis 14, and the valve body of the second four-way valve 82 extends along the length direction of the chassis 14.

[0159] In this embodiment, the spatial layout of the chassis 14 is fully considered, so that the valve body of the four-way valve 8 is reasonably placed in a limited space, which further improves the space utilization rate and avoids interference between components.

[0160] In some embodiments of this application, the notch may include a second notch segment 32, which is located at the end of the second base plate 142 away from the first base plate 141.

[0161] Among them, the width of the projection range of the valve bodies of compressor 4 and shut-off valve 7 on chassis 14 is smaller than the width of the second notch segment 32.

[0162] In this embodiment, by setting the second gap section 32, not only is it ensured that the air flows smoothly in the heat exchange space 23, reducing airflow obstruction and improving heat exchange efficiency, but it also provides additional space for maintenance operations, thereby improving maintainability.

[0163] In some embodiments of this application, the outdoor heat exchanger 2 may include a heat exchanger body 21, which is composed of fins and a plurality of heat exchange tubes passing through the fins. The heat exchange tubes are used to circulate refrigerant.

[0164] By utilizing the fins to fully exchange heat with the outside air, the heat exchange performance of the outdoor heat exchanger 2 is effectively improved, thereby enhancing the cooling and heating effect of the entire air conditioning system.

[0165] The outdoor heat exchanger 2 may include a refrigerant pipe assembly 22, which is connected to the heat exchange tubes inside the heat exchanger body 21 to allow refrigerant to enter and exit the heat exchange tubes.

[0166] The refrigerant pipe assembly 22 is projected onto the chassis 14 onto the second base plate 142 and is located on the side of the four-way valve 8 away from the first base plate 141.

[0167] In this embodiment, the refrigerant pipe assembly 22 is positioned between the four-way valve 8 and one end of the outdoor heat exchanger 2. This helps optimize the internal spatial layout of the outdoor unit, avoiding spatial conflicts and interference between the refrigerant pipe assembly 22 and other components such as the four-way valve 8, resulting in smoother and more rational connections between the components. Simultaneously, this layout also helps reduce bends and detours in the refrigerant piping, lowering pipe resistance and improving the efficiency of refrigerant flow, thereby enhancing the overall system performance and energy efficiency ratio.

[0168] In some embodiments of this application, the outdoor unit of a top-discharge air conditioner may include a refrigerant heat dissipation module, which is located above the shut-off valve 7 and connected to the plate heat exchanger 9.

[0169] Referring to Figure 10, the refrigerant heat dissipation module is connected in series with the liquid-side shut-off valve 73 to dissipate heat using the cooling capacity of the refrigerant.

[0170] In this embodiment, the refrigerant heat dissipation module 105 can be used to dissipate heat from the outdoor unit's electrical control box, thereby improving heat dissipation efficiency. The refrigerant heat dissipation module 105 is located above the shut-off valve 7, utilizing natural convection to enhance heat dissipation, preventing high temperatures from affecting valve performance, and improving system operational stability.

[0171] In some other embodiments, the chassis 14 can be a single, integrally formed chassis. The compressor 4 and the oil separator 6 are located on one side of the centerline along the length of the chassis 14, with the oil separator 6 located behind the compressor 4. The gas-liquid separator 5, the four-way valve 8, and the shut-off valve 7 are located on the other side of the centerline, with the compressor 4 and the gas-liquid separator 5 positioned close to the centerline.

[0172] In this embodiment, the centerline along the length of the chassis 14 is used as the basis for layout, and the various components in the outdoor unit are arranged in a reasonable manner. The compressor 4, the shut-off valve 7, and the four-way valve 8 are positioned relatively close to the first notch section 31, which not only reduces wind resistance but also facilitates installation and maintenance. The compressor 4 and the gas-liquid separator 5 are positioned close to the centerline to prevent excessive lateral shift of the unit's center of gravity, which could affect transportation safety. At the same time, the oil separator 6 is located behind the compressor 4, which can shorten the length of the connecting pipeline, reduce pipeline costs, and greatly improve space utilization.

[0173] In some embodiments, referring to FIG10, by controlling the four-way valve 8 and the shut-off valve 7, the air conditioning system can achieve at least one of the modes of cooling, heating, and hot water production.

[0174] When the air conditioning system is in cooling mode and the electronic expansion valve 17 is closed, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port of the compressor 4 flows to the outdoor heat exchanger 2 after passing through the first four-way valve 81. After condensation and heat release, it becomes a high-temperature and high-pressure liquid refrigerant. Then, after being throttled by the throttling device 18, it enters the first refrigerant flow path of the plate heat exchanger 9. Then, it flows to the indoor unit through the liquid-side shut-off valve 73 and the liquid pipe 104. After absorbing heat and evaporating in the indoor heat exchanger, it flows to the suction port of the compressor 4 through the first gas pipe 101 and / or the second gas pipe 102.

[0175] When the air conditioning system is operating in cooling mode and the electronic expansion valve 17 is open, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 4 flows to the outdoor heat exchanger 2 after passing through the first four-way valve 81. After condensation and heat release, it becomes a high-temperature, high-pressure liquid refrigerant. Then, after being throttled by the throttling device 18, it enters the first refrigerant flow path of the plate heat exchanger 9. At this time, the refrigerant in the first refrigerant flow path is divided into two paths. One path is throttled by the electronic expansion valve 17, absorbs heat and evaporates in the second refrigerant flow path, and then flows to the suction port of the compressor 4. The other path flows to the indoor unit through the liquid-side shut-off valve 73 and the liquid pipe 104, absorbs heat and evaporates in the indoor heat exchanger, and then flows to the suction port of the compressor 4 through the first gas pipe 101 and / or the second gas pipe 102.

[0176] When the air conditioning system is operating in heating mode and the electronic expansion valve 17 is closed, the high-temperature, high-pressure gaseous refrigerant discharged from the exhaust port of the compressor 4 flows to the indoor unit through the first four-way valve 81 and / or the second four-way valve 82 and the first gas pipe 101 and / or the second gas pipe 102. After condensing and releasing heat in the indoor heat exchanger, it becomes a high-temperature, high-pressure liquid refrigerant, which then flows to the outdoor unit through the liquid-side shut-off valve 73 and the liquid pipe 104. The high-temperature, high-pressure liquid refrigerant enters the first refrigerant flow path of the plate heat exchanger 9 and enters the outdoor heat exchanger 2 after being throttled by the throttling device 18. After absorbing heat and evaporating in the outdoor heat exchanger 2, it flows to the suction port of the compressor 4 through the first four-way valve 81.

[0177] When the air conditioning system is operating in heating mode and the electronic expansion valve 17 is open, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 4's exhaust port flows to the indoor unit via the first four-way valve 81 and / or the second four-way valve 82, and then through the first gas pipe 101 and / or the second gas pipe 102. After condensing and releasing heat in the indoor heat exchanger, it becomes a high-temperature, high-pressure liquid refrigerant, which then flows to the outdoor unit via the liquid-side shut-off valve 73 and the liquid pipe 104. The refrigerant flowing to the outdoor unit is divided into two paths: one path passes through the electronic expansion valve 17 into the second refrigerant flow path of the plate heat exchanger 9, absorbs heat and evaporates, and then flows to the compressor 4's suction port; the other path continues to release heat through the first refrigerant flow path of the plate heat exchanger 9, and after being throttled by the throttling device 18, it enters the outdoor heat exchanger 2, absorbs heat and evaporates in the outdoor heat exchanger 2, and then flows to the compressor 4's suction port via the first four-way valve 81.

[0178] When the air conditioning system is operating in cooling mode, it can be switched to hot water mode via the hydraulic module shut-off valve 74. In this mode, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 4 outlet passes through the first four-way valve 81 and the hydraulic module shut-off valve 74 into the hydraulic module, where it is heated by the water flow path, enabling it to produce hot water. The refrigerant flowing out of the hydraulic module, together with the refrigerant in the indoor heat exchanger, enters the outdoor unit through the liquid pipe 104 and the liquid-side shut-off valve 73, thus completing the circulation of the entire air conditioning system.

[0179] The top-discharge outdoor unit of the air conditioner provided in this embodiment rationally arranges the compressor 4, gas-liquid separator 5, oil separator 6, four-way valve 8, and shut-off valve 7 within a limited space, improving space utilization, reducing the overall size of the unit, and lowering transportation safety and installation space requirements. At the same time, placing important components at the openings not only reduces wind resistance but also facilitates installation and maintenance, reducing repair time and costs.

[0180] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0181] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of the embodiments suitable for specific application considerations.

Claims

1. A top-discharge outdoor unit for an air conditioner, characterized in that, include: The casing includes an outdoor air outlet and an outdoor air inlet. The outdoor air outlet is located on the top of the casing, and the outdoor air inlet is located on the side wall of the casing. The casing includes a chassis. The chassis is formed by splicing a first base plate and a second base plate arranged along the length of the chassis. The splicing line between the first base plate and the second base plate is located on the center line of the chassis. An outdoor fan is located inside the casing and is positioned near the outdoor air outlet. An outdoor heat exchanger is supported on the chassis and forms a semi-enclosed heat exchange space on the chassis. A notch communicating with the heat exchange space is provided on the circumferential side wall of the outdoor heat exchanger. The notch includes a first notch segment formed at one end in the width direction of the chassis. A compressor is located within the heat exchange space, situated on a first base plate and close to the second base plate and the first notch section; a gas-liquid separator is located on the second base plate and close to the first base plate, with the gas-liquid separator positioned at the other end of the chassis in the width direction; an oil separator is located on the first base plate and on the side of the compressor away from the first notch section; a shut-off valve is located near the first notch section, its projection on the chassis being located on the second base plate; a four-way valve is located on the side of the shut-off valve away from the first notch section, its projection on the chassis being located on the second base plate, the height of the four-way valve body being greater than the height of the shut-off valve body, and the height of the four-way valve body being lower than the height of the gas-liquid separator.

2. The top-discharge outdoor unit of an air conditioner according to claim 1, characterized in that, It also includes a plate heat exchanger installed on the second base plate, the plate heat exchanger being located between the compressor and the shut-off valve, the plate heat exchanger being positioned close to the first notch section and its height being lower than the height of the four-way valve.

3. The top-discharge outdoor unit of an air conditioner according to claim 2, characterized in that, The shut-off valve includes: a first gas-side shut-off valve, located on the first gas pipe connecting the outdoor unit of the air conditioner to the outside; a second gas-side shut-off valve, located on the second gas pipe connecting the outdoor unit of the air conditioner to the outside; and a liquid-side shut-off valve, located on the liquid pipe connecting the outdoor unit of the air conditioner to the outside.

4. The top-discharge outdoor unit of an air conditioner according to claim 3, characterized in that, The shut-off valve further includes a hydraulic module shut-off valve, one end of which is connected to the exhaust port of the compressor, and the other end is connected to the hydraulic module.

5. The top-discharge outdoor unit of an air conditioner according to claim 3, characterized in that, The four-way valve includes: a first four-way valve connected to the compressor, the outdoor heat exchanger, and the first gas pipe, used to control the outdoor heat exchanger to be used as a condenser or an evaporator; and a second four-way valve connected to the compressor, the first four-way valve, and the second gas pipe, used to control the heating of at least two indoor air conditioning units; the first four-way valve and the second four-way valve are spaced apart along the length of the chassis, the second four-way valve is closer to the compressor than the first four-way valve, and the height of the valve body of the second four-way valve is lower than the height of the valve body of the first four-way valve.

6. The top-discharge outdoor unit of an air conditioner according to claim 5, characterized in that, The valve body of the first four-way valve extends along the width direction of the chassis, and the valve body of the second four-way valve extends along the length direction of the chassis.

7. The top-discharge outdoor unit of an air conditioner according to claim 1, characterized in that, The notch also includes a second notch segment, which is located at the end of the second base plate away from the first base plate; the width of the projection range of the compressor and the valve body of the shut-off valve on the chassis is smaller than the width of the second notch segment.

8. The top-discharge outdoor unit of an air conditioner according to claim 1, characterized in that, The outdoor heat exchanger includes a heat exchanger body and a refrigerant pipe assembly. The refrigerant pipe assembly is connected to the heat exchange tubes inside the heat exchanger body to allow the refrigerant to enter and exit the heat exchange tubes. The projection of the refrigerant pipe assembly on the chassis is located on the second base plate and on the side of the four-way valve away from the first base plate.

9. The top-discharge outdoor unit of an air conditioner according to claim 2, characterized in that, It also includes a refrigerant heat dissipation module, which is located above the shut-off valve and connected to the plate heat exchanger.

10. A top-discharge outdoor unit for an air conditioner, characterized in that, include: The housing includes an outdoor air outlet and an outdoor air inlet. The outdoor air outlet is located on the top of the housing, and the outdoor air inlet is located on the side wall of the housing. The housing includes a chassis. An outdoor fan is located inside the housing and is positioned close to the outdoor air outlet. An outdoor heat exchanger is supported on a chassis and forms a semi-enclosed heat exchange space on the chassis. A notch communicating with the heat exchange space is provided on the circumferential sidewall of the outdoor heat exchanger. The notch includes: a first notch segment formed at one end of the chassis width direction; a compressor disposed within the heat exchange space, placed on the chassis and located near the first notch segment; a gas-liquid separator disposed on the chassis, located near the other end of the chassis width direction; an oil separator disposed on the chassis and located on the side of the compressor away from the first notch segment; a shut-off valve located relative to the gas-liquid separator and near the first notch segment; and a four-way valve located on the side of the shut-off valve away from the first notch segment, with the valve body height of the four-way valve greater than that of the shut-off valve. The compressor and the oil separator are located on one side of the centerline in the width direction of the chassis, while the gas-liquid separator, the shut-off valve, and the four-way valve are located on the other side of the centerline, with the compressor and the gas-liquid separator located near the centerline.

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