Dual-system air conditioning unit

Abstract

The utility model relates to a dual-system air conditioning unit, which belongs to the technical field of air conditioners and comprises a bottom plate, an external heat exchanger and a system component. Wherein the bottom plate is rectangular, and four edges of the bottom plate are respectively a first side edge, a second side edge, a third side edge and a fourth side edge in a clockwise or anticlockwise direction. The external heat exchanger is arranged on the bottom plate; the external heat exchanger comprises a first heat exchange section, a second heat exchange section, a third heat exchange section and a fourth heat exchange section which are connected in sequence; the first heat exchange section is arranged on the part of the first side edge; the second heat exchange section is arranged on the second side edge; the third heat exchange section is arranged on the third side edge; and the fourth heat exchange section is arranged on the part of the fourth side edge. A containing cavity is defined by the bottom plate and the external heat exchanger. The system assembly is arranged in the containing cavity, and the system assembly is close to a corner formed by the first side edge and the fourth side edge.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and more particularly to a dual-system air conditioning unit. Background Technology

[0002] Dual-system air conditioning units are a type of efficient and stable air conditioning system, widely used in large buildings and upscale venues such as office buildings, shopping malls, hotels, and computer rooms.

[0003] A dual-system air conditioning unit refers to an air conditioning system with dual refrigerant circuits. It typically consists of two refrigeration systems, including two compressors, dual fans, dual condensers, and other key components. These two systems can start and operate separately at different times as needed to meet different cooling or heating demands.

[0004] In existing technologies, due to cost considerations, top-discharge single-frame air handling units are trending towards larger sizes, with a single frame replacing multiple frame modules, resulting in significant cost competitiveness. Simultaneously, it's crucial to maximize frame utilization and achieve the highest possible capacity. Therefore, compressor displacement, heat exchanger size, and heat exchange efficiency become particularly important. Consequently, there is an urgent need for air handling units that can accommodate large-displacement compressors, increase heat exchanger size, and improve heat exchange efficiency within a limited frame size. Utility Model Content

[0005] This utility model solves, to at least a certain extent, one of the technical problems in the related art.

[0006] Therefore, this application aims to provide a dual-system air conditioning unit in which the first, second, third, and fourth heat exchange sections of the external heat exchanger largely cover the entire perimeter of the air conditioner, allowing heat exchange from all four sides, resulting in a better heat exchange area and efficiency. Furthermore, the system components are positioned at the gap between the first and fourth heat exchange sections of the external heat exchanger, making the design more rational and convenient for production, installation, disassembly, and maintenance.

[0007] To achieve the above objectives, this utility model provides a dual-system air conditioning unit, comprising:

[0008] The base plate is rectangular, and its four sides are designated as the first side, the second side, the third side, and the fourth side in a clockwise or counterclockwise direction, respectively.

[0009] An external heat exchanger is disposed on the base plate; the external heat exchanger includes a first heat exchange section, a second heat exchange section, a third heat exchange section, and a fourth heat exchange section connected in sequence; the first heat exchange section is disposed on a portion of a first side; the second heat exchange section is disposed on a second side; the third heat exchange section is disposed on a third side; and the fourth heat exchange section is disposed on a portion of a fourth side.

[0010] The base plate and the external heat exchanger form a receiving cavity;

[0011] A system component disposed within the receiving cavity, and the system component being located near the corner formed by the first side and the fourth side.

[0012] In this technical solution, the first, second, third, and fourth heat exchange sections of the external heat exchanger largely cover the entire perimeter of the air conditioner, allowing heat exchange from all four sides, resulting in a larger heat exchange area and higher efficiency. Furthermore, the system components are positioned at the gap between the first and fourth heat exchange sections of the external heat exchanger, making the design more rational and convenient for production, installation, disassembly, and maintenance.

[0013] In some embodiments of this application, the system components include:

[0014] A first compressor is disposed within the receiving cavity and near the end of the fourth heat exchange section;

[0015] The second compressor is disposed on one side of the first compressor along the length direction of the fourth side.

[0016] In the technical solution, the first compressor and the second compressor are located in the middle and front position of the dual-system air conditioning unit, which can prevent the center of gravity of the dual-system air conditioning from shifting too much to the left and right, thus affecting transportation safety.

[0017] In some embodiments of this application, the system components include:

[0018] A first shut-off valve is disposed on the side of the first compressor and the second compressor away from the third heat exchange section;

[0019] The second shut-off valve is located on the side of the first shut-off valve away from the third heat exchange section.

[0020] In the technical solution, the first and second shut-off valves are located at the notch of the external heat exchanger to facilitate external pipe connection operations.

[0021] In some embodiments of this application, the system components include:

[0022] A plate heat exchanger is disposed on the side of the second shut-off valve near the second heat exchange section.

[0023] In the technical solution, the part located behind the second shut-off valve, on the base plate, and at the front of the dual-system air conditioning unit, offers better manufacturability.

[0024] In some embodiments of this application, the system components include:

[0025] A four-way valve is disposed within the receiving cavity.

[0026] In the technical solution, the four-way valve is located near the middle of the base plate to reduce the possibility of it being blocked by other components.

[0027] In some embodiments of this application, the four-way valve is located near the plate heat exchanger.

[0028] The technical solution facilitates the connection of the four-way valve with the gas-liquid separator and heat exchanger.

[0029] In some embodiments of this application, the system components include:

[0030] The first oil separator is located on the side of the first compressor near the second heat exchange section;

[0031] The second oil separator is located on the side of the second compressor near the second heat exchange section.

[0032] In the technical solution, the first oil separator and the second oil separator are both located close to the corresponding first compressor and second compressor, which can shorten the length of the connecting pipe between the first compressor and the first oil separator, as well as shorten the length of the connecting pipe between the second compressor and the second oil separator, thereby reducing the cost of the connecting pipe.

[0033] In some embodiments of this application, the system components include:

[0034] A gas-liquid separator is disposed on the side of the first compressor and the second compressor near the second heat exchange section.

[0035] In the technical solution, the gas-liquid separator is located close to the first compressor and the second compressor, which can shorten the connection distance between the gas-liquid separator and the corresponding first compressor and second compressor, thereby saving the cost of the connecting pipe.

[0036] In some embodiments of this application, the base plate includes:

[0037] The first half-plate is rectangular;

[0038] The second half-plate is rectangular;

[0039] The first half plate and the second half plate are joined together to form the base plate.

[0040] In this technical solution, a single, larger base plate is formed by splicing together two smaller first and second halves, which is easier to manufacture and reduces the investment in molds during development. It also reduces transportation costs and facilitates transport.

[0041] In addition, this application also provides a dual-system air conditioning unit, which includes:

[0042] The base plate is rectangular;

[0043] An external heat exchanger is disposed on the base plate; the external heat exchanger is G-shaped; the notch of the external heat exchanger is located near one corner of the base plate;

[0044] System components are disposed within the area enclosed by the external heat exchanger.

[0045] In this technical solution, the external heat exchanger is G-shaped, thus covering most of the air conditioner's perimeter, allowing heat exchange from all four sides, resulting in a larger heat exchange area and higher efficiency. Furthermore, the system components are positioned at the notches in the external heat exchanger, making the design more rational and convenient for production, installation, disassembly, and maintenance.

[0046] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of a dual-system air conditioning unit according to an embodiment of this application;

[0048] Figure 2 This is a schematic diagram of the overall structure of a dual-system air conditioning unit according to an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of the overall structure of a dual-system air conditioning unit according to an embodiment of this application;

[0050] Figure 4 This is a schematic diagram of the internal structure of a dual-system air conditioning unit according to an embodiment of this application;

[0051] Figure 5 This is a top view of the internal structure of a dual-system air conditioning unit according to an embodiment of this application;

[0052] Figure 6 This is a top view of the base plate of a dual-system air conditioning unit according to an embodiment of this application;

[0053] Figure 7 This is a top view of the internal structure of a dual-system air conditioning unit according to an embodiment of this application;

[0054] Figure 8 This is a top view of the base plate of a dual-system air conditioning unit according to an embodiment of this application;

[0055] Figure 9 This is a schematic diagram of the external heat exchanger of a dual-system air conditioning unit according to an embodiment of this application;

[0056] Figure 10 This is a top view of the external heat exchanger of a dual-system air conditioning unit according to an embodiment of this application.

[0057] In the above figures: 100, base plate; 101, first half plate; 102, second half plate; 103, first side; 104, second side; 105, third side; 106, fourth side; 200, external heat exchanger; 201, first heat exchange section; 202, second heat exchange section; 203, third heat exchange section; 204, fourth heat exchange section; 300, first compressor; 400, second compressor; 500, first shut-off valve; 600, second shut-off valve; 700, plate heat exchanger; 800, four-way valve; 900, first oil separator; 110, second oil separator; 120, gas-liquid separator; 130, outer shell. Detailed Implementation

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0063] In this application, the dual-system air conditioning unit typically consists of two refrigeration systems, including two compressors, two fans, and two condensers, among other key components. The working principle of the dual-system air conditioning unit is based on these two refrigeration systems. When the air conditioner is operating normally, both systems perform either cooling or heating operations. By adjusting the operating intervals of the two systems, more efficient energy utilization and a more stable operating state can be achieved. When one system fails, the other system can promptly take over the task, ensuring the normal operation of the air conditioner; that is, the two systems can operate independently or simultaneously.

[0064] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0065] Please refer to all the accompanying drawings. In one schematic embodiment of the dual-system air conditioning unit of this utility model, the dual-system air conditioning unit includes: a base plate 100, which is rectangular in shape. During operation, the air conditioning unit will generate certain vibrations and noise. The base plate 100 provides a stable and robust support platform, ensuring smooth operation of the air conditioning unit and reducing the impact of vibration and noise on the surrounding environment.

[0066] In some embodiments, the four sides of the base plate 100 are respectively the first side 103, the second side 104, the third side 105, and the fourth side 106 in a clockwise direction.

[0067] In some embodiments, the four edges of the base plate 100 are, in counterclockwise directions, a first side 103, a second side 104, a third side 105, and a fourth side 106, respectively.

[0068] In some embodiments, the dual-system air conditioning unit further includes an external heat exchanger 200, which is mounted on the base plate 100. The external heat exchanger 200 can transfer heat absorbed from the refrigerant to the external environment, or transfer heat from the external environment to the system interior, through the circulating refrigerant, thereby achieving the purpose of regulating room temperature. In this process, the external heat exchanger 200 effectively utilizes the principle of heat transfer to realize the cooling or heating function of the air conditioning system.

[0069] In some embodiments, the external heat exchanger 200 includes a first heat exchange section 201, which is disposed on the base plate 100 and corresponds to the portion of the first side 103. Airflow from the direction of the first side 103 of the base plate 100 contacts the first heat exchange section 201 and exchanges heat, thereby cooling or heating the refrigerant in the first heat exchange section 201.

[0070] In some embodiments, the external heat exchanger 200 includes a second heat exchange section 202, which is disposed on a portion of a second side 104 of the base plate 100. Airflow from the direction of the second side 104 of the base plate 100 contacts the second heat exchange section 202 and exchanges heat, thereby cooling or heating the refrigerant within the second heat exchange section 202.

[0071] In some embodiments, the external heat exchanger 200 includes a third heat exchange section 203 connected in sequence, the third heat exchange section 203 being disposed on a third side 105 of the base plate 100. Airflow coming from the direction of the third side 105 of the base plate 100 contacts the third heat exchange section 203 and exchanges heat, thereby achieving cooling or heating of the refrigerant in the third heat exchange section 203.

[0072] In some embodiments, the external heat exchanger 200 includes a fourth heat exchange section 204 connected in sequence, the fourth heat exchange section 204 being disposed on a portion of a fourth side 106 on the base plate 100. Airflow coming from the direction of the fourth side 106 of the base plate 100 contacts the fourth heat exchange section 204 and exchanges heat, thereby achieving cooling or heating of the refrigerant within the fourth heat exchange section 204.

[0073] In some embodiments, the base plate 100 and the external heat exchanger 200 are arranged to form a receiving cavity. The gap formed between the fourth heat exchange section 204 and the first heat exchange section 201 is the gap in the receiving cavity.

[0074] In some embodiments, the dual-system air conditioning unit further includes a system component disposed within a receiving cavity and located near the corner formed by the first side 103 and the fourth side 106. The system component is a core component of the air conditioning unit, used to ensure the operation of the air conditioner.

[0075] With the above design, the first heat exchange section 201, the second heat exchange section 202, the third heat exchange section 203, and the fourth heat exchange section 204 of the external heat exchanger 200 largely cover the four sides of the air conditioner, allowing heat exchange from all four sides, resulting in a better heat exchange area and efficiency. Furthermore, the system components are positioned at the gap between the first heat exchange section 201 and the fourth heat exchange section 204 in the external heat exchanger 200, making the design more rational and convenient for production, installation, disassembly, and maintenance.

[0076] In some embodiments, the second side 104 and the fourth side 106 of the base plate 100 are long sides, and the first side 103 and the third side 105 are short sides.

[0077] In some embodiments, the direction of the fourth side 106 on the base plate 100 is the front of the dual-system air conditioning unit, and the direction of the second side 104 on the base plate 100 is the rear of the dual-system air conditioning unit. Alternatively, the fourth side 106 can be described as being in front of the dual-system air conditioning unit, and the second side 104 as being behind it.

[0078] In other embodiments, the first side 103 and the third side 105 of the base plate 100 are long sides, and the second side 104 and the fourth side 106 are short sides.

[0079] In some embodiments, the system component includes a first compressor 300 disposed within the receiving cavity and near the end of the fourth heat exchange section 204.

[0080] In some embodiments, the system component includes a second compressor 400 disposed on one side of the first compressor 300 along the length direction of the fourth side 106.

[0081] With the above scheme, the first compressor 300 and the second compressor 400 are located in the middle and front position of the dual-system air conditioning unit, which can prevent the center of gravity of the dual-system air conditioning from shifting too much to the left and right, thus affecting transportation safety.

[0082] In some embodiments, the first compressor 300 is closer to the third heat exchange section 203 than the second compressor 400. That is, the second compressor 400 is located on the side of the first compressor 300 away from the third heat exchange section 203.

[0083] In another embodiment, the second compressor 400 is closer to the third heat exchange section 203 than the first compressor 300. That is, the first compressor 300 is located on the side of the second compressor 400 away from the third heat exchange section 203.

[0084] In some embodiments, the system component includes a first shut-off valve 500 disposed at a notch in the external heat exchanger 200. Specifically, the first shut-off valve 500 is disposed at the corner formed by the first side 103 and the fourth side 106. Further, the first shut-off valve 500 is disposed on the side of the first compressor 300 and the second compressor 400 away from the third heat exchange section 203.

[0085] In some embodiments, the system component includes a second shut-off valve 600 disposed at a notch in the external heat exchanger 200. Specifically, the second shut-off valve 600 is disposed at the corner formed by the first side 103 and the fourth side 106. Further, the second shut-off valve 600 is disposed on the side of the first shut-off valve 500 away from the third heat exchange section 203.

[0086] With the above scheme, the first shut-off valve 500 and the second shut-off valve 600 are located at the notch of the external heat exchanger 200, which facilitates external pipe connection operations.

[0087] In some embodiments, the first compressor 300 is connected to a first pipeline, in which refrigerant flows, and a first shut-off valve 500 is disposed on the first pipeline to control the refrigerant flow rate in the first pipeline.

[0088] In some embodiments, the second compressor 400 is connected to a second pipeline, in which refrigerant flows, and a second shut-off valve 600 is disposed on the second pipeline to control the refrigerant flow rate in the second pipeline.

[0089] In some embodiments, the system component includes a plate heat exchanger 700 disposed on the side of the second shut-off valve 600 near the second heat exchange section 202. The plate heat exchanger 700 is located behind the second shut-off valve 600, on the base plate 100, and in a forward position of the dual-system air conditioning unit, which improves manufacturability.

[0090] In some embodiments, the external heat exchanger 200 is connected to the first compressor 300 via a pipeline. The external heat exchanger 200, the first compressor 300, and the first shut-off valve 500 form a first heat exchange system.

[0091] In some embodiments, the plate heat exchanger 700 is connected to the second compressor 400 via piping. The plate heat exchanger 700, the second compressor 400, and the second shut-off valve 600 form a second heat exchange system.

[0092] In some embodiments, the dual-system air conditioning unit further includes an indoor heat exchanger, which is disposed indoors and is used to exchange heat with indoor air.

[0093] In some embodiments, the indoor heat exchanger is connected to the outdoor heat exchanger 200, and the refrigerant flows between the outdoor heat exchanger 200 and the indoor heat exchanger to achieve the exchange of indoor and outdoor temperatures, thereby achieving cooling or heating of the indoor space.

[0094] In some embodiments, the indoor heat exchanger is connected to the plate heat exchanger 700, and the refrigerant flows between the plate heat exchanger 700 and the indoor heat exchanger to achieve the exchange of indoor and outdoor temperatures, thereby achieving cooling or heating of the indoor space.

[0095] In some embodiments, the indoor heat exchanger is connected to both the outdoor heat exchanger 200 and the plate heat exchanger 700.

[0096] In some embodiments, there are two indoor heat exchangers, namely a first indoor heat exchanger and a second indoor heat exchanger. The first indoor heat exchanger is connected to the external heat exchanger 200, and the second indoor heat exchanger is connected to the plate heat exchanger 700.

[0097] In some embodiments, the system component includes a four-way valve 800 disposed within a receiving cavity. The four-way valve 800 is located on the base plate 100 near the center to reduce the possibility of it being obstructed by other components.

[0098] In some embodiments, a four-way valve 800 is connected to the pipeline of the external heat exchanger 200. The refrigerant flow direction between the external heat exchanger 200 and the indoor heat exchanger is adjusted by the four-way valve 800, thereby changing the cooling or heating mode.

[0099] In some embodiments, a four-way valve 800 is connected to the pipeline of the plate heat exchanger 700. The refrigerant flow direction between the plate heat exchanger 700 and the indoor heat exchanger is adjusted by the four-way valve 800, thereby changing the cooling or heating mode.

[0100] In some embodiments, the four-way valve 800 is located near the plate heat exchanger 700. This facilitates connection of the four-way valve 800 to the gas-liquid separator 120 and the heat exchanger, wherein the heat exchanger is the plate heat exchanger 700, the external heat exchanger 200, or the internal heat exchanger.

[0101] In some embodiments, the system component includes a first oil separator 900, which is disposed on the side of the first compressor 300 near the second heat exchange section 202. The first oil separator 900 is connected to the pipeline containing the first compressor 300 and separates the lubricating oil from the high-pressure vapor discharged from the first compressor 300, ensuring that the lubricating oil does not accumulate in other parts of the refrigeration system, thereby maintaining the normal operation and high efficiency of the system.

[0102] In some embodiments, the system component includes a second oil separator 110, which is disposed on the side of the second compressor 400 near the second heat exchange section 202. The second oil separator 110 is connected to the pipeline containing the second compressor 400 and separates the lubricating oil from the high-pressure vapor discharged by the second compressor 400, ensuring that the lubricating oil does not accumulate in other parts of the refrigeration system, thereby maintaining the normal operation and high efficiency of the system.

[0103] With the above solution, the first oil separator 900 and the second oil separator 110 are both close to the corresponding first compressor 300 and second compressor 400, which can shorten the length of the connecting pipe between the first compressor 300 and the first oil separator 900, as well as the length of the connecting pipe between the second compressor 400 and the second oil separator 110, thereby reducing the cost of the connecting pipe.

[0104] In some embodiments, the system components include a gas-liquid separator 120, which is disposed on the side of the first compressor 300 and the second compressor 400 near the second heat exchange section 202. The gas-liquid separator 120 separates the gaseous and liquid refrigerant, ensuring that only gaseous refrigerant enters the first compressor 300 and / or the second compressor 400, thereby protecting the first compressor 300 and / or the second compressor 400 from the impact of liquid refrigerant. The proximity of the gas-liquid separator 120 to the first compressor 300 and the second compressor 400 shortens the connection distance between the gas-liquid separator 120 and the corresponding first compressor 300 and second compressor 400, thus saving on the cost of connecting pipes.

[0105] In some embodiments, the base plate 100 includes a first half plate 101, which is rectangular.

[0106] In some embodiments, the base plate 100 further includes a second half plate 102, which is rectangular, and the first half plate 101 and the second half plate 102 are joined together to form the base plate 100. A single, larger base plate 100 is formed by joining two smaller first half plates 101 and second half plates 102, which facilitates manufacturing and reduces the investment in molds during development. Additionally, it reduces transportation costs and facilitates transport.

[0107] In some embodiments, the first half-plate 101 and the second half-plate 102 have the same shape, which facilitates manufacturing. Furthermore, the first half-plate 101 and the second half-plate 102 have the same structure.

[0108] In some embodiments, a first compressor 300 is disposed on a first half plate 101, and a second compressor 400 is disposed on a second half plate 102. Alternatively, a first compressor 300 is disposed on a second half plate 102, and a second compressor 400 is disposed on a first half plate 101.

[0109] In some embodiments, one side of the first half plate 101 in the width direction is connected to one side of the second half plate 102 in the width direction to form a base plate 100.

[0110] In some embodiments, the dual-system air conditioning unit further includes a housing 130 disposed on the base plate 100, which covers the external heat exchanger 200 and system components. This protects the structure of the dual-system air conditioning unit.

[0111] Furthermore, referring to all the accompanying drawings, this application also provides a dual-system air conditioning unit, which includes a base plate 100, which is rectangular in shape. During operation, the air conditioning unit will generate some vibration and noise. The base plate 100 provides a stable and robust support platform, ensuring smooth operation of the air conditioning unit and reducing the impact of vibration and noise on the surrounding environment.

[0112] In some embodiments, the dual-system air conditioning unit further includes an external heat exchanger 200, which is mounted on the base plate 100. The external heat exchanger 200 can transfer heat absorbed in the refrigerant to the external environment, or transfer heat from the external environment to the system, thereby achieving the purpose of regulating room temperature. In this process, the external heat exchanger 200 effectively utilizes the principle of heat transfer to realize the cooling or heating function of the air conditioning system.

[0113] In some embodiments, the external heat exchanger 200 is G-shaped; the notch of the external heat exchanger 200 is located near one corner of the base plate 100.

[0114] System components are located within the area enclosed by the external heat exchanger 200.

[0115] With the above design, the external heat exchanger 200 is G-shaped, thus covering most of the air conditioner's perimeter, allowing heat exchange from all four sides, resulting in a better heat exchange area and efficiency. Furthermore, the system components are positioned at the notch in the external heat exchanger 200, making the design more rational and convenient for production, installation, disassembly, and maintenance.

[0116] In some embodiments, the system components include a first compressor 300 disposed on the base plate 100 and located at a notch in the external heat exchanger 200.

[0117] In some embodiments, the system component includes a second compressor 400 disposed on the base plate 100 and located at a notch in the external heat exchanger 200.

[0118] In some embodiments, both the first compressor 300 and the second compressor 400 are connected to the first shut-off valve 500 and the second shut-off valve 600, and both are connected to the external heat exchanger 200 and the plate heat exchanger 700. This allows the first shut-off valve 500, the second shut-off valve 600, the first compressor 300, the second compressor 400, the plate heat exchanger 700, the external heat exchanger 200, and the indoor heat exchanger to form a complete circuit. This constitutes a complete refrigeration system. The first compressor 300 and the second compressor 400 can operate simultaneously. If either the first compressor 300 or the second compressor 400 fails, the operation of the other compressor can ensure the normal operation of the refrigeration system.

[0119] The refrigerant passing through the first shut-off valve 500 is gaseous, while the refrigerant passing through the second shut-off valve 600 is liquid.

[0120] In this application, the first compressor 300 and the second compressor 400 can operate independently or together.

[0121] In some embodiments, the first compressor 300 forms a loop with the first shut-off valve 500, the external heat exchanger 200, and the indoor heat exchanger. The second compressor 400 forms a loop with the second shut-off valve 600, the plate heat exchanger 700, and the indoor heat exchanger, thereby forming two completely separate systems.

[0122] Through the above-mentioned scheme, the layout of the dual-system air conditioning unit presents a layout with a lower front and a higher back, and upper and lower layers.

[0123] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual-system air conditioning unit, characterized in that, It includes: The base plate is rectangular, and its four sides are designated as the first side, the second side, the third side, and the fourth side in a clockwise or counterclockwise direction, respectively. An external heat exchanger is disposed on the base plate; the external heat exchanger includes a first heat exchange section, a second heat exchange section, a third heat exchange section, and a fourth heat exchange section connected in sequence; the first heat exchange section is disposed on a portion of a first side; the second heat exchange section is disposed on a second side; the third heat exchange section is disposed on a third side; and the fourth heat exchange section is disposed on a portion of a fourth side. The base plate and the external heat exchanger form a receiving cavity; A system component disposed within the receiving cavity, and the system component being located near the corner formed by the first side and the fourth side.

2. The dual-system air conditioning unit according to claim 1, characterized in that, The system components include: A first compressor is disposed within the receiving cavity and near the end of the fourth heat exchange section; The second compressor is disposed on one side of the first compressor along the length direction of the fourth side.

3. The dual-system air conditioning unit according to claim 2, characterized in that, The system components include: A first shut-off valve is disposed at the corner formed by the first side and the fourth side; the first shut-off valve is disposed on the side of the first compressor and the second compressor away from the third heat exchange section; The second shut-off valve is located at the corner formed by the first side and the fourth side; the second shut-off valve is located on the side of the first shut-off valve away from the third heat exchange section.

4. The dual-system air conditioning unit according to claim 3, characterized in that, The system components include: A plate heat exchanger is disposed on the side of the second shut-off valve near the second heat exchange section.

5. The dual-system air conditioning unit according to claim 4, characterized in that, The system components include: A four-way valve is disposed within the receiving cavity; the four-way valve is located near the plate heat exchanger.

6. The dual-system air conditioning unit according to claim 2, characterized in that, The system components include: The first oil separator is located on the side of the first compressor near the second heat exchange section; The second oil separator is located on the side of the second compressor near the second heat exchange section.

7. The dual-system air conditioning unit according to claim 2, characterized in that, The system components include: A gas-liquid separator is disposed on the side of the first compressor and the second compressor near the second heat exchange section.

8. The dual-system air conditioning unit according to claim 2, characterized in that, The base plate includes: The first half-plate is rectangular; The second half-plate is rectangular; The first half plate and the second half plate are joined together to form the base plate.

9. The dual-system air conditioning unit according to claim 8, characterized in that, The first half-plate and the second half-plate have the same shape; The first compressor is disposed on the first half plate; the second compressor is disposed on the second half plate.

10. A dual-system air conditioning unit, characterized in that, It includes: The base plate is rectangular; An external heat exchanger is disposed on the base plate; the external heat exchanger is G-shaped; the notch of the external heat exchanger is located near one corner of the base plate; System components are disposed within the area enclosed by the external heat exchanger.

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