Air conditioning system

Abstract

The present invention provides an air conditioning system. The system includes a compressor, a first throttling device, a second throttling device, and a radiative-convective heat exchanger; and the radiative-convective heat exchanger includes: a radiative heat exchange part which is in a cylindrical shape with both ends open, absorbs heat or cold from its inner wall surface, and radiates heat or cold to the outside from its outer wall surface; a first convective heat exchange part which is arranged inside the radiative heat exchange part and is configured to transfer heat or cold to the air flowing through the inside of the radiative heat exchange part and transfer heat or cold to the inner wall surface of the radiative heat exchange part; and a second convective heat exchange part which is configured to perform heat exchange with the air flowing through it; and the first convective heat exchange part has a first refrigerant inlet and a first refrigerant outlet, the first refrigerant inlet is communicated with the first throttling device, and the first refrigerant outlet is communicated with the compressor; the second convective heat exchange part has a second refrigerant inlet and a second refrigerant outlet, the second refrigerant inlet is communicated with the second throttling device, and the second refrigerant outlet is communicated with the compressor.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration and heating, and particularly to an air conditioning system. Background Art

[0002] Existing air conditioning heat exchangers mainly heat or cool air in the form of forced convection heat transfer, and then transfer heat or cold to a room or a human body. However, this heat transfer in the form of convection heat transfer will reduce the thermal comfort of the human body. Especially when higher heating or cooling capacity is required, the high wind blown out inside the air conditioning heat exchanger is extremely likely to cause thermal discomfort to the human body. Summary of the Invention

[0003] The present invention aims to overcome at least one defect of the existing heat exchanger, and provides an air conditioning system which can significantly reduce the thermal discomfort of the human body when exchanging heat with the human body or a room.

[0004] To this end, the present invention proposes an air conditioning system, including a compressor, a first throttling device, a second throttling device, and a radiative-convective heat exchanger; and the radiative-convective heat exchanger includes:

[0005] A radiative heat transfer part, which is in the shape of a cylinder with both ends open, and is configured to absorb heat or cold from its inner wall surface and radiate heat or cold to the outside from its outer wall surface;

[0006] A first convective heat transfer part, which is arranged inside the radiative heat transfer part, and is configured to transfer heat or cold to the air flowing through the inside of the radiative heat transfer part, and transfer heat or cold to the inner wall surface of the radiative heat transfer part; and

[0007] A second convective heat transfer part, which is configured to exchange heat with the air flowing through it; and

[0008] The first convective heat transfer part has a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet is connected to the first throttling device, and the first refrigerant outlet is connected to the compressor;

[0009] The second convective heat transfer part has a second refrigerant inlet and a second refrigerant outlet. The second refrigerant inlet is connected to the second throttling device, and the second refrigerant outlet is connected to the compressor.

[0010] Optionally, the radiative heat transfer part is arranged above or below the second convective heat transfer part.

[0011] Optionally, the air conditioning system further includes a condenser. The inlet of the condenser is connected to the outlet of the compressor, and the outlet of the condenser is connected to the inlets of the first throttling device and the second throttling device.

[0012] Optionally, the radiative-convective heat exchanger further includes a first blower and a second blower;

[0013] The first blower is disposed outside one end of the radiative heat exchange part, so that air enters the radiative heat exchange part from the one end of the radiative heat exchange part, exchanges heat with the first convective heat exchange part, and then flows out from the other end of the radiative heat exchange part;

[0014] The second blower is disposed on one side of the second convective heat exchange part.

[0015] Optionally, the radiative-convective heat exchanger further includes a third blower, which is disposed outside one end of the radiative heat exchange part and configured to prompt part of the air to enter the radiative heat exchange part from the one end of the radiative heat exchange part, exchange heat with the first convective heat exchange part, and then flow out from the other end of the radiative heat exchange part; and to prompt part of the air to flow through the second convective heat exchange part.

[0016] Optionally, the total volume of the refrigerant flow-through space in the first convective heat exchange part is greater than the total volume of the refrigerant flow-through space in the second convective heat exchange part, so that the refrigerant flow rate in the first convective heat exchange part is greater than the refrigerant flow rate in the second convective heat exchange part.

[0017] Optionally, both the first convective heat exchange part and the second convective heat exchange part adopt a finned tube structure.

[0018] Optionally, the first convective heat exchange part includes a plurality of heat exchange plates having first refrigerant channels, and each heat exchange plate has a first edge and a second edge extending along the axial direction of the radiative heat exchange part; the first edge is disposed in the middle of the inner space of the radiative heat exchange part, and the second edge is connected to the inner wall surface of the radiative heat exchange part;

[0019] A plurality of heat dissipation fins are sequentially disposed between every two adjacent heat exchange plates along the radial direction of the radiative heat exchange part.

[0020] Optionally, the first convective heat exchange part includes a plurality of coaxially arranged heat exchange cylinders, and each heat exchange cylinder is coaxially arranged with the radiative heat exchange part;

[0021] A plurality of second refrigerant channels are provided on the cylinder wall of each heat exchange cylinder; a plurality of heat dissipation fins are provided on the outer wall surface of each heat exchange cylinder, and are thermally connected to the inner wall surface of the corresponding heat dissipation cylinder on the radial outer side of the heat exchange cylinder or the inner wall surface of the radiative heat exchange part.

[0022] Optionally, the outer contour of the cross section of the radiative heat exchange part is circular, semi-circular, square or fan-shaped.

[0023] In the air conditioning system of the present invention, since it has a radiation heat exchange part and a first convection heat exchange part, the cylindrical radiation plate undertakes part of the heating or cooling load. It can reduce the blowing feeling on the human body and increase the human thermal comfort on the premise of ensuring the heating or cooling capacity. Especially in winter heating, the radiation heat exchange can significantly increase the human thermal comfort. Further, the addition of the cylindrical radiation plate can reduce the number of refrigerant pipelines (such as finned tubes).

[0024] From the following detailed description of specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will become more clear about the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0026] Figure 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0027] Figure 2 is Figure 1 a schematic structural diagram of a radiation-convection heat exchanger in the air conditioning system shown;

[0028] Figure 3 is Figure 2 a schematic cross-sectional view of a radiation heat exchange part and a first convection heat exchange part in the radiation-convection heat exchanger shown;

[0029] Figure 4 is Figure 2 a schematic cross-sectional view of a radiation heat exchange part and a first convection heat exchange part in the radiation-convection heat exchanger shown;

[0030] Figure 5 is Figure 2 a schematic cross-sectional view of a partial structure of the radiation-convection heat exchanger shown;

[0031] Figure 6 is Figure 2 a schematic cross-sectional view of a partial structure of the radiation-convection heat exchanger shown;

[0032] Figure 7 is Figure 2 a schematic cross-sectional view of a radiation heat exchange part and a first convection heat exchange part in the radiation-convection heat exchanger shown;

[0033] Figure 8 is Figure 2 a schematic cross-sectional view of a radiation heat exchange part and a first convection heat exchange part in the radiation-convection heat exchanger shown;

[0034] Figure 9 is Figure 2 A schematic cross-sectional view of a radiation-convection heat exchanger showing a radiation heat exchange section and a first convection heat exchange section. Detailed implementation manners

[0035] Figure 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention. As Figure 1 shown and referring to Figures 2 to 9 , an embodiment of the present invention provides an air conditioning system. The air conditioning system may include a compressor 60, a first throttling device 81, a second throttling device 82, and a radiation-convection heat exchanger. The radiation-convection heat exchanger may include a radiation heat exchange section 20, a first convection heat exchange section 30, and a second convection heat exchange section 40. The radiation heat exchange section 20 and the first convection heat exchange section 30 may constitute a radiation-convection heat exchange section.

[0036] As Figure 2 shown, the radiation heat exchange section 20 is in a cylindrical shape with openings at both ends, configured to absorb heat or cold from its inner wall surface and radiate heat or cold to the outside from its outer wall surface. For example, the outer contour of the cross-section of the radiation heat exchange section 20 is circular, semi-circular, square, or fan-shaped. The first convection heat exchange section 30 is disposed inside the radiation heat exchange section 20, configured to generate heat or cold, transfer the heat or cold to the air flowing through the inside of the radiation heat exchange section 20, and transfer the heat or cold to the inner wall surface of the radiation heat exchange section 20. The radiation heat exchange section 20 is located on the outer shell surface of the radiation-convection heat exchange section and can directly serve as the outer shell of the radiation-convection heat exchange section. The second convection heat exchange section 40 is configured to generate heat or cold and perform heat exchange with the air flowing through it. The radiation heat exchange section is disposed above or below the second convection heat exchange section 40. Preferably, the radiation heat exchange section 20 is disposed above the second convection heat exchange section 40.

[0037] The first convection heat exchange section 30 has a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet is connected to the first throttling device 81, and the first refrigerant outlet is connected to the compressor 60. The second convection heat exchange section 40 may have a second refrigerant inlet and a second refrigerant outlet. The second refrigerant inlet is connected to the second throttling device 82, and the second refrigerant outlet is connected to the compressor 60.

[0038] Furthermore, the air conditioning system further includes a condenser 70. The inlet of the condenser 70 is connected to the outlet of the compressor 60, and the outlet of the condenser 70 is connected to the inlets of the first throttling device 81 and the second throttling device 82.

[0039] When the air - conditioning system in the embodiment of the present invention is working, the first convective heat - exchange part 30 generates heat or cold, exchanges heat with the air inside the radiative heat - exchange part 20, and exchanges heat with the inner wall surface of the radiative heat - exchange part 20. The air after heat - exchange can flow out of the radiative heat - exchange part 20 and is used for indoor or human body warmth or cooling. The outer wall surface of the radiative heat - exchange part 20 can radiate heat or cold outward and is used for indoor or human body warmth or cooling. The cylindrical radiation plate undertakes part of the heating or cooling load. It can reduce the blowing feeling of the human body and increase the human body's thermal comfort on the premise of ensuring the heating or cooling capacity; especially when heating in winter, radiative heat - exchange can significantly increase the human body's thermal comfort. And the radiative heat - exchange part 20 and the first convective heat - exchange part 30 mainly undertake sensible heat compounding; the second convective heat - exchange part 40 mainly undertakes latent heat load.

[0040] In some embodiments of the present invention, the first convective heat - exchange part 30 includes a refrigerant pipeline and heat - dissipating fins 33 arranged on the refrigerant pipeline. For example, the refrigerant pipeline includes a plurality of circular straight pipe segments and a plurality of connecting pipe segments respectively connecting two circular straight pipe segments; there are a plurality of heat - dissipating fins 33, which are installed on a plurality of straight pipe segments. That is, the first convective heat - exchange part 30 can be a conventional fin - tube heat exchanger. The second convective heat - exchange part 40 can be a conventional fin - tube heat exchanger.

[0041] In some preferred embodiments of the present invention, as Figure 3 and Figure 4 shown, the refrigerant pipeline includes a plurality of heat - exchange plates 31, and each heat - exchange plate 31 is provided with a plurality of first refrigerant channels 32 extending along the length direction or the width direction of the heat - exchange plate 31. There are a plurality of heat - dissipating fins 33, which are installed on a plurality of heat - exchange plates 31.

[0042] Furthermore, each heat - exchange plate 31 has a first edge and a second edge extending along the axial direction of the radiative heat - exchange part 20. The first edge is arranged in the middle of the inner space of the radiative heat - exchange part 20, and the second edge is connected to the inner wall surface of the radiative heat - exchange part 20. A plurality of heat - exchange plates 31 are evenly distributed along the circumferential direction of the radiative heat - exchange part 20. For example, in some embodiments, each heat - exchange plate 31 extends along the axial direction of the radiative heat - exchange part 20 and extends along the radial direction of the radiative heat - exchange part 20, as Figure 3 shown. In some other embodiments, each heat - exchange plate 31 is arranged cross -wise with respect to the radial direction of the radiative heat - exchange part 20 towards the second edge of the heat - exchange plate 31, as Figure 4 shown.

[0043] In some embodiments of the present invention, a plurality of heat dissipation fins 33 are disposed between every two adjacent heat exchange plates 31 and are sequentially arranged in the radial direction of the radiative heat exchange portion 20. One or more heat dissipation holes are formed in each heat dissipation fin 33, forming a hollow structure. Each first refrigerant channel 32 extends in the axial direction of the radiative heat exchange portion 20. The plurality of first refrigerant channels 32 in each heat exchange plate 31 are sequentially arranged from the first edge to the second edge.

[0044] In the radial direction of the radiative heat exchange portion 20, the interval between two adjacent heat dissipation fins 33 among the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 has a plurality of distance values, so that the arrangement density of the plurality of heat dissipation fins 33 is unequal. For example, in the radial direction of the radiative heat exchange portion 20, the plurality of distance values decrease sequentially, that is, the heat dissipation fins 33 are arranged sparsely first and then densely.

[0045] Specifically, the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 are arranged in multiple groups. Each group of heat dissipation fins 33 has at least two heat dissipation fins 33. The distance between every two adjacent heat dissipation fins 33 in each group of heat dissipation fins 33 is equal to one of the above distance values, so that the interval between the heat dissipation fins 33 between every two adjacent heat exchange plates 31 has a plurality of distance values. Two adjacent groups can share a heat dissipation fin 33, that is, grouping is carried out by using a shared heat dissipation fin 33.

[0046] In each heat exchange plate 31, in the direction from the first edge to the second edge, the plurality of first refrigerant channels 32 are sequentially arranged. The interval between two adjacent first refrigerant channels 32 has one or more spacing values. The plurality of spacing values decrease sequentially. The plurality of first refrigerant channels 32 on each heat exchange plate 31 are arranged in multiple groups. Each group of first refrigerant channels 32 has at least two first refrigerant channels 32. The distance between every two adjacent first refrigerant channels 32 in each group of first refrigerant channels 32 is equal to one of the above spacing values, so that the interval between the first refrigerant channels 32 on each heat exchange plate 31 has a plurality of spacing values. Two adjacent groups can share a first refrigerant channel 32, that is, grouping is carried out by using a shared first refrigerant channel 32.

[0047] In the direction from the first edge to the second edge, the ratio between the number of the first refrigerant channels 32 and the number of the heat dissipation fins 33 is 4 / 5 to 10 / 1, preferably 1 / 1 to 10 / 1. Each heat dissipation fin 33 is in an arc shape arched towards the outside of the radiation heat exchange part 20. The cross-sectional profile of each first refrigerant channel 32 is rectangular, circular or other regular or irregular shapes. The hydraulic radius of each first refrigerant channel 32 is 0.1 - 10 mm; the number of the first refrigerant channels 32 on each heat exchange plate 31 is 10 - 50. The number of the heat exchange plates 31 is 4 to 50. In some embodiments of the present invention, in the direction from the first edge to the second edge, there is one spacing between two adjacent first refrigerant channels 32, that is, multiple first refrigerant channels 32 are arranged at equal intervals. The distance between two adjacent heat dissipation fins 33 among the multiple heat dissipation fins 33 between every two adjacent heat exchange plates 31 is one, that is, the multiple heat dissipation fins 33 between every two adjacent heat exchange plates 31 are arranged at equal intervals.

[0048] In some alternative embodiments of the present invention, as Figure 5 shown, each heat dissipation fin 33 can be a flat sheet-shaped heat dissipation fin 34. On both sides of each heat exchange plate 31, the above-mentioned flat sheet-shaped heat dissipation fins 34 are sequentially arranged in the direction from the corresponding first edge to the second edge. Each heat dissipation fin 33 is perpendicular to the corresponding heat exchange plate 31. In some other alternative embodiments of the present invention, as Figure 6 shown, each heat dissipation fin 33 can be a needle-shaped heat dissipation fin 35, and on both sides of each heat exchange plate 31, multiple needle-shaped heat dissipation fins 35 perpendicular to the heat exchange plate 31 are arranged. In some alternative embodiments of the present invention, other types of heat dissipation fins can also be arranged on both sides of each heat exchange plate 31, such as tree-shaped heat dissipation fins, irregular-shaped heat dissipation fins, etc., as can be Figure 7 shown. Further, the heat exchange plate 31 is preferably integrally formed with the heat dissipation fin 33.

[0049] In some other preferred embodiments of the present invention, as Figure 8 and Figure 9 shown, the refrigerant pipeline includes multiple heat exchange cylinders 36 arranged coaxially, and each heat exchange cylinder 36 is coaxially arranged with the radiation heat exchange part 20. Multiple second refrigerant channels 37 are arranged inside the cylinder wall of each heat exchange cylinder 36. The number of the heat dissipation fins 33 is multiple. At least the outside of the innermost heat exchange cylinder 36 has multiple heat dissipation fins 33. For example, both the outside and the inside of the innermost heat exchange cylinder 36 have multiple heat dissipation fins 33. The inside of the outermost heat exchange cylinder 36 has multiple heat dissipation fins 33; and the outside of the outermost heat exchange cylinder 36 is thermally connected to the inner wall surface of the radiation heat exchange part 20 through multiple heat dissipation fins 33, or, the outer wall surface of the outermost heat exchange cylinder 36 is integrally formed with or in contact with the inner wall surface of the radiation heat exchange part 20.

[0050] Further, both the inner and outer sides of each intermediate heat exchange cylinder 36 have a plurality of heat dissipation fins 33. If there is no other structure between two adjacent heat exchange cylinders 36, the heat dissipation fins on the outer side of the inner heat exchange cylinder 36 and the heat dissipation fins on the inner side of the outer heat exchange cylinder 36 are the same heat exchange fins, which can be a fin layer. If there is other structure between two adjacent heat exchange cylinders 36, such as a support cylinder coaxially arranged with the heat exchange cylinder 36, the heat dissipation fins on the outer side of the inner heat exchange cylinder 36 and the heat dissipation fins on the inner side of the outer heat exchange cylinder 36 can form two fin layers, located on both sides of the support cylinder.

[0051] Each second refrigerant channel 37 extends along the axial direction of the radiative heat exchange part 20. A plurality of second refrigerant channels 37 in the cylinder wall of each heat exchange cylinder 36 are arranged in sequence along the circumferential direction of the heat exchange cylinder 36. The cross-sections of the plurality of second refrigerant channels 37 in the cylinder wall of each heat exchange cylinder 36 can include circles and polygons, and the polygon can be an approximately rectangular structure. The polygon second refrigerant channels and the circular second refrigerant channels are alternately arranged in sequence along the circumferential direction of the heat exchange cylinder 36. Each heat dissipation fin 33 extends along the axial direction of the radiative heat exchange part 20 to form an air flow channel extending along the axial direction of the radiative heat exchange part 20. One or more heat dissipation holes are provided on each heat dissipation fin 33.

[0052] In some embodiments of the present invention, the first convective heat exchange part 30 further includes at least one of the above support cylinders. Each support cylinder is arranged between two adjacent heat exchange cylinders 36 or on the inner side of the innermost heat exchange cylinder 36. There are heat dissipation fins 33 between each support cylinder and the heat exchange cylinder 36 on its inner or outer side. Further, the heat dissipation fin 33 can be integrally formed with the corresponding heat exchange cylinder or support cylinder on its inner side, and the outer side can be in contact and abutted against the corresponding heat exchange cylinder or support cylinder on its outer side.

[0053] In some embodiments of the present invention, among every two adjacent heat exchange cylinders 36, the cross-sectional area of each second refrigerant channel 37 on the outer heat exchange cylinder 36 is larger than the cross-sectional area of each second refrigerant channel 37 on the inner heat exchange cylinder 36. The heat dissipation fins 33 on each side of each heat exchange cylinder 36 can form a fin layer. Among every two adjacent fin layers, the length of the outer heat dissipation fin 33 extending along the radial direction of the radiative heat exchange part 20 is greater than the length of the inner heat dissipation fin 33 extending along the radial direction of the radiative heat exchange part 20. The wall thickness of each heat dissipation fin 33 is 0.2 - 1 mm, and the distance between every two adjacent heat dissipation fins 33 in each fin layer is 0.5 - 10 mm. The hydraulic radius of each second refrigerant channel 37 is 0.6 - 10 mm.

[0054] In some embodiments of the present invention, the first convective heat exchange part 30 defines a central channel 38 extending along the axial direction of the radiative heat exchange part 20, located in the center of the inner space of the radiative heat exchange part 20. The central channel 38 can be configured to circulate air or refrigerant. In other embodiments, closed structures are provided at both ends of the central channel 38, and the central channel 38 can also be configured to be provided with fittings such as shunt pipes. Each first refrigerant channel 32 / second refrigerant channel 37 is preferably a microchannel tube. The heat exchange plate 31, the heat exchange cylinder 36, and the radiative heat exchange part 20 can all be made of copper or aluminum.

[0055] In some embodiments of the present invention, for ease of processing and manufacturing, the first convective heat exchange part 30 is formed by an extrusion process. Or, the whole formed by the first convective heat exchange part 30 and the radiative heat exchange part 20 is formed by an extrusion process. As Figures 3 to 9 shown.

[0056] In some embodiments of the present invention, the refrigerant pipeline further has a total inlet pipe and a total outlet pipe; one end of each first refrigerant channel 32 / second refrigerant channel 37 is communicated with the total inlet pipe, and the other end is communicated with the total outlet pipe, so that a plurality of first refrigerant channels 32 / second refrigerant channels 37 are connected in parallel.

[0057] In other embodiments of the present invention, the radiative convective heat exchange part may have at least one parallel unit, and each parallel unit has a plurality of channel groups. Each channel group has at least one first refrigerant channel 32 / second refrigerant channel 37; the heads and tails of the plurality of channel groups of each parallel unit are connected in series in sequence. When there are multiple parallel units, the multiple parallel units are connected in parallel. Each channel group may have one of the above-mentioned heat exchange plates 31. For example, the number of heat exchange plates 31 is 16, and every 4 heat exchange plates 31 form 4 channel groups, which are connected in series in sequence from head to tail, that is, every 4 heat exchange plates 31 form a parallel unit, that is, a total of 4 parallel units, and these 4 parallel units are connected in parallel with each other. Further, a collecting inlet pipe and a collecting outlet pipe are provided at both ends of each heat exchange plate 31 to facilitate reasonable pipeline layout. The inlet of at least one parallel unit is connected to the total inlet pipe, and the outlet can be connected to the total outlet pipe.

[0058] In some embodiments of the present invention, the radiative convective heat exchanger further includes a first fan and a second fan; the first fan is arranged outside one end of the radiative heat exchange part, so that air enters the radiative heat exchange part from one end of the radiative heat exchange part, exchanges heat with the first convective heat exchange part, and then flows out from the other end of the radiative heat exchange part; the second fan is arranged on one side of the second convective heat exchange part 40. The first fan and the second fan can be controlled separately.

[0059] In some preferred embodiments of the present invention, as Figure 2As shown, the radiative convection heat exchanger further includes a third fan 50, which is disposed outside one end of the radiative heat exchange part and configured to cause part of the air to enter the radiative heat exchange part from one end of the radiative heat exchange part, flow out from the other end of the radiative heat exchange part after exchanging heat with the first convective heat exchange part; and cause part of the air to flow through the second convective heat exchange part 40.

[0060] Further, the total volume of the refrigerant flow-through space in the first convective heat exchange part is greater than the total volume of the refrigerant flow-through space in the second convective heat exchange part 40, so that the refrigerant flow rate in the first convective heat exchange part is greater than the refrigerant flow rate in the second convective heat exchange part 40.

[0061] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. An air conditioning system, characterized in that, It includes a compressor, a first throttling device, a second throttling device, and a radiative-convective heat exchanger; And the radiative-convective heat exchanger includes: A radiative heat exchange part which is in a cylindrical shape with both ends open, configured to absorb heat or cold from its inner wall surface and radiate heat or cold to the outside from its outer wall surface; A first convective heat exchange part arranged inside the radiative heat exchange part, configured to transfer heat or cold to the air flowing through the inside of the radiative heat exchange part and transfer heat or cold to the inner wall surface of the radiative heat exchange part; and A second convective heat exchange part configured to perform heat exchange with the air flowing through it; and The first convective heat exchange part has a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet is connected to the first throttling device, and the first refrigerant outlet is connected to the compressor; The second convective heat exchange part has a second refrigerant inlet and a second refrigerant outlet. The second refrigerant inlet is connected to the second throttling device, and the second refrigerant outlet is connected to the compressor; The first convective heat exchange part includes a plurality of heat exchange plates. Each heat exchange plate has a first edge and a second edge extending along the axial direction of the radiative heat exchange part. The first edge is arranged in the middle of the inner space of the radiative heat exchange part, and the second edge is connected to the inner wall surface of the radiative heat exchange part. A plurality of first refrigerant channels are arranged in each heat exchange plate. Each first refrigerant channel extends along the axial direction of the radiative heat exchange part. In each heat exchange plate, in the direction from the first edge to the second edge, the plurality of first refrigerant channels are arranged in sequence, and the interval sizes between two adjacent first refrigerant channels have a plurality of spacing values, and the plurality of spacing values decrease in sequence.

2. The air conditioning system according to claim 1, wherein The radiative heat exchange part is arranged above or below the second convective heat exchange part.

3. The air conditioning system according to claim 1 or 2, characterized in that, It further includes: A condenser. The inlet of the condenser is connected to the outlet of the compressor, and the outlet of the condenser is connected to the inlet of the first throttling device and the inlet of the second throttling device.

4. The air conditioning system according to claim 1 or 2, wherein The radiative-convective heat exchanger further includes a first fan and a second fan; The first fan is arranged outside one end of the radiative heat exchange part so that air enters the radiative heat exchange part from the one end of the radiative heat exchange part, exchanges heat with the first convective heat exchange part, and then flows out from the other end of the radiative heat exchange part; The second fan is arranged on one side of the second convective heat exchange part.

5. The air conditioning system according to claim 2, wherein The radiative-convective heat exchanger further includes a third fan. The third fan is arranged outside one end of the radiative heat exchange part, configured to cause part of the air to enter the radiative heat exchange part from the one end of the radiative heat exchange part, exchange heat with the first convective heat exchange part, and then flow out from the other end of the radiative heat exchange part; and cause part of the air to flow through the second convective heat exchange part.

6. The air conditioning system according to claim 1, wherein The total volume of the refrigerant flow-through space in the first convective heat exchange part is greater than the total volume of the refrigerant flow-through space in the second convective heat exchange part, so that the refrigerant flow rate in the first convective heat exchange part is greater than the refrigerant flow rate in the second convective heat exchange part.

7. The air conditioning system according to claim 1, wherein both the first convective heat exchange part and the second convective heat exchange part adopt a finned tube structure.

8. The air conditioning system according to claim 7, wherein a plurality of heat dissipation fins are arranged between every two adjacent heat exchange plates and are sequentially arranged along the radial direction of the radiation heat exchange part.

9. The air conditioning system according to claim 7, wherein the outer contour of the cross section of the radiation heat exchange part is circular, semicircular, square or fan-shaped.

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