Air conditioning system

Abstract

The present invention provides an air conditioning system. The air conditioning system includes a first compressor, a second 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 cylindrical, 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 first 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 second 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 form of heat transfer by convection 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 compression device, a first throttling device, a second throttling device, and a radiative-convective heat exchanger; and

[0005] the compression device includes an independent first cylinder and a second cylinder;

[0006] The radiative-convective heat exchanger includes:

[0007] 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;

[0008] 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

[0009] a second convective heat transfer part, which is configured to exchange heat with the air flowing through it; and

[0010] the first convective heat transfer 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 first cylinder;

[0011] the second convective heat transfer 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 second cylinder.

[0012] Optionally, the radiative heat transfer part is arranged above or below the second convective heat transfer part.

[0013] Optionally, the air conditioning system further includes a condenser, an inlet of the condenser is communicated with the first cylinder and the second cylinder, and an outlet of the condenser is communicated with an inlet of the first throttling device and an inlet of the second throttling device;

[0014] The compression device includes a first compressor having the first cylinder and a second compressor having the second cylinder.

[0015] Optionally, the radiation-convection heat exchanger further includes a first fan and a second fan;

[0016] The first fan is arranged outside one end of the radiation heat exchange part, so that air enters the radiation heat exchange part from the one end of the radiation heat exchange part, exchanges heat with the first convection heat exchange part and then flows out from the other end of the radiation heat exchange part;

[0017] The second fan is arranged on one side of the second convection heat exchange part.

[0018] Optionally, the radiation-convection heat exchanger further includes a third fan, the third fan is arranged outside one end of the radiation heat exchange part, configured to prompt part of the air to enter the radiation heat exchange part from the one end of the radiation heat exchange part, exchange heat with the first convection heat exchange part and then flow out from the other end of the radiation heat exchange part; and to prompt part of the air to flow through the second convection heat exchange part.

[0019] Optionally, the total volume of the refrigerant flow-through space in the first convection heat exchange part is greater than the total volume of the refrigerant flow-through space in the second convection heat exchange part, so that the refrigerant flow rate in the first convection heat exchange part is greater than the refrigerant flow rate in the second convection heat exchange part.

[0020] Optionally, both the first convection heat exchange part and the second convection heat exchange part adopt a finned tube structure.

[0021] Optionally, the first convection 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 radiation heat exchange part; the first edge is arranged in the middle of the inner space of the radiation heat exchange part, and the second edge is connected to the inner wall surface of the radiation heat exchange part;

[0022] A plurality of heat exchange fins are arranged between every two adjacent heat exchange plates and are arranged in sequence along the radial direction of the radiation heat exchange part.

[0023] Optionally, the first convective heat exchange part includes a plurality of heat exchange cylinders arranged coaxially, and each of the heat exchange cylinders is arranged coaxially with the radiative heat exchange part; a plurality of second refrigerant channels are arranged on the cylinder wall of each heat exchange cylinder. A plurality of heat dissipation fins are arranged 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 or the inner wall surface of the radiative heat exchange part on the radially outer side of the heat exchange cylinder.

[0024] Optionally, the outer contour of the cross-section of the radiative heat exchange part is circular, semi-circular, square or fan-shaped.

[0025] In the air conditioning system of the present invention, because there is a radiative heat exchange part and a first convective heat exchange part, the cylindrical radiation plate undertakes part of the heating or cooling load, which can reduce the blowing feeling of the human body and increase the thermal comfort of the human body on the premise of ensuring the heating or cooling capacity; especially in winter heating, the radiative heat exchange can significantly increase the thermal comfort of the human body. Further, the addition of the cylindrical radiation plate can reduce the number of refrigerant pipelines (such as finned tubes).

[0026] From the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more clear about the above and other objects, advantages and features of the present invention. Description of the Drawings

[0027] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an exemplary and non-limiting 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:

[0028] Figure 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0029] Figure 2 is Figure 1 a schematic structural diagram of a radiative convective heat exchanger in the air conditioning system shown;

[0030] Figure 3 is Figure 2 a schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the radiative convective heat exchanger shown;

[0031] Figure 4 is Figure 2 a schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the radiative convective heat exchanger shown;

[0032] Figure 5 is Figure 2 a schematic cross-sectional view of a partial structure of the radiative convective heat exchanger shown;

[0033] Figure 6 is Figure 2Schematic cross-sectional view of a partial structure of the shown radiative-convective heat exchanger;

[0034] Figure 7 is Figure 2 Schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the shown radiative-convective heat exchanger;

[0035] Figure 8 is Figure 2 Schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the shown radiative-convective heat exchanger;

[0036] Figure 9 is Figure 2 Schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the shown radiative-convective heat exchanger. Detailed implementation manners

[0037] 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 compression device, a first throttling device 81, a second throttling device 82, and a radiative-convective heat exchanger. The radiative-convective heat exchanger may include a radiative heat exchange part 20, a first convective heat exchange part 30, and a second convective heat exchange part 40. The radiative heat exchange part 20 and the first convective heat exchange part 30 may constitute a radiative-convective heat exchange part. The compression device may have an independent first cylinder and a second cylinder.

[0038] As Figure 2 shown, the radiative heat exchange part 20 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. For example, the outer contour of the cross-section of the radiative heat exchange part 20 is circular, semi-circular, square, or fan-shaped. The first convective heat exchange part 30 is disposed inside the radiative heat exchange part 20, configured to generate heat or cold, transfer the heat or cold to the air flowing through the inside of the radiative heat exchange part 20, and transfer the heat or cold to the inner wall surface of the radiative heat exchange part 20. The radiative heat exchange part 20 is located on the outer shell surface of the radiative-convective heat exchange part and can directly serve as the outer shell of the radiative-convective heat exchange part. The second convective heat exchange part 40 is configured to generate heat or cold and perform heat exchange with the air flowing through it. The radiative heat exchange part is disposed above or below the second convective heat exchange part 40. Preferably, the radiative heat exchange part 20 is disposed above the second convective heat exchange part 40.

[0039] The first convective heat exchange part 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 first cylinder. The second convective heat exchange part 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 second cylinder.

[0040] Further, the air-conditioning system further includes a condenser 70. The inlet of the condenser 70 communicates with the first cylinder and the second cylinder, and the outlet of the condenser 70 communicates with the inlets of the first throttling device 81 and the second throttling device 82. Specifically, the compression device includes a first compressor 61 and a second compressor 62.

[0041] 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 for indoor or human body warmth or cooling. The outer wall surface of the radiative heat exchange part 20 can radiate heat or cold to the outside for indoor or human body warmth or cooling. The cylindrical radiation plate undertakes part of the heating or cooling load, can reduce the blowing feeling of the human body and increase the human body thermal comfort on the premise of ensuring the heating or cooling capacity; especially when heating in winter, the radiative heat exchange can significantly increase the human body 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. Using two independent cylinders is convenient for independently controlling the sensible heat load and the latent heat load.

[0042] In some embodiments of the present invention, the first convective heat exchange part 30 includes a refrigerant pipeline and heat dissipation 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 the two circular straight pipe segments; there are a plurality of heat dissipation fins 33, which are installed on the plurality of straight pipe segments. That is, the first convective heat exchange part 30 can be a conventional finned tube heat exchanger. The second convective heat exchange part 40 can be a conventional finned tube heat exchanger.

[0043] In some preferred embodiments of the present invention, such 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 dissipation fins 33, which are installed on the plurality of heat exchange plates 31.

[0044] Further, 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. The 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 crosswise with respect to the radial direction of the radiative heat exchange part 20 facing the second edge of the heat exchange plate 31, asFigure 4 as shown

[0045] In some embodiments of the present invention, a plurality of heat dissipation fins 33 are arranged between every two adjacent heat exchange plates 31 in sequence along the radial direction of the radiative heat exchange portion 20. One or more heat dissipation holes are provided on each heat dissipation fin 33, forming a hollow structure. Each first refrigerant channel 32 extends along the axial direction of the radiative heat exchange portion 20. A plurality of first refrigerant channels 32 in each heat exchange plate 31 are arranged in sequence from the first edge to the second edge.

[0046] Along the radial direction of the radiative heat exchange portion 20, the interval sizes between two adjacent heat dissipation fins 33 among the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 have a plurality of distance values, so that the arrangement densities of the plurality of heat dissipation fins 33 are different. For example, along the radial direction of the radiative heat exchange portion 20, the plurality of distance values decrease in sequence, that is, the heat dissipation fins 33 are arranged from sparse to dense.

[0047] 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 sizes between the heat dissipation fins 33 between every two adjacent heat exchange plates 31 have a plurality of distance values. Two adjacent groups can share one heat dissipation fin 33, that is, grouping is carried out by using a shared heat dissipation fin 33.

[0048] In each heat exchange plate 31, a plurality of first refrigerant channels 32 are arranged in sequence from the first edge to the second edge. The interval sizes between two adjacent first refrigerant channels 32 have one or more spacing values. The plurality of spacing values decrease in sequence. 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 sizes between the first refrigerant channels 32 on each heat exchange plate 31 have a plurality of spacing values. Two adjacent groups can share one first refrigerant channel 32, that is, grouping is carried out by using a shared first refrigerant channel 32.

[0049] 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, a plurality of first refrigerant channels 32 are arranged at equal intervals. The distance between two adjacent heat dissipation fins 33 among the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 is one, that is, the plurality of heat dissipation fins 33 between every two adjacent heat exchange plates 31 are arranged at equal intervals.

[0050] In some alternative embodiments of the present invention, as Figure 5 shown, each heat dissipation fin 33 can be a flat sheet-like heat dissipation fin 34. On both sides of each heat exchange plate 31, the above-mentioned flat sheet-like 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-like heat dissipation fin 35, and a plurality of needle-like heat dissipation fins 35 perpendicular to the heat exchange plate 31 are arranged on both sides of each heat exchange plate 31. In some alternative embodiments of the present invention, other types of heat dissipation fins, such as tree-like heat dissipation fins, irregular-shaped heat dissipation fins, etc., can also be arranged on both sides of each heat exchange plate 31, as Figure 7 shown. Further, the heat exchange plate 31 and the heat dissipation fin 33 are preferably integrally formed.

[0051] In some other preferred embodiments of the present invention, as Figure 8 and Figure 9 shown, the refrigerant pipeline includes a plurality of heat exchange cylinders 36 arranged coaxially, and each heat exchange cylinder 36 is coaxially arranged with the radiation heat exchange part 20. A plurality of 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 a plurality of heat dissipation fins 33. For example, both the outside and the inside of the innermost heat exchange cylinder 36 have a plurality of heat dissipation fins 33. The inside of the outermost heat exchange cylinder 36 has a plurality of 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 a plurality of 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.

[0052] Further, both the inner and outer sides of each heat exchange cylinder 36 in the middle are provided with 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.

[0053] Each second refrigerant channel 37 extends along the axial direction of the radiation 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 may include circles and polygons, and the polygon may be an approximate 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 radiation heat exchange part 20 to form an air flow channel extending along the axial direction of the radiation heat exchange part 20. One or more heat dissipation holes are provided on each heat dissipation fin 33.

[0054] 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 arranged inside 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.

[0055] 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 radiation heat exchange part 20 is greater than the length of the inner heat dissipation fin 33 extending along the radial direction of the radiation 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.

[0056] 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.

[0057] In some embodiments of the present invention, for the convenience 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.

[0058] 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.

[0059] 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 first and last 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 the first to the last, 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 collector inlet pipe and a collector outlet pipe are provided at both ends of each heat exchange plate 31 to facilitate the reasonable layout of the pipeline. 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.

[0060] 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.

[0061] In some preferred embodiments of the present invention, as Figure 2As shown, the radiative-convective heat exchanger further includes a third blower 50 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.

[0062] 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.

[0063] 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 compression device, a first throttling device, a second throttling device, and a radiation-convection heat exchanger; and The compression device includes an independent first cylinder and a second cylinder; The radiation-convection heat exchanger includes: A radiation 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 convection heat exchange part, which is arranged inside the radiation heat exchange part, configured to transfer heat or cold to the air flowing through the inside of the radiation heat exchange part, and transfer heat or cold to the inner wall surface of the radiation heat exchange part; and A second convection heat exchange part, configured to exchange heat with the air flowing through it; and The first convection 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 first cylinder; The second convection 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 second cylinder; The first convection 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 radiation heat exchange part; the first edge is arranged in the middle of the inner space of the radiation heat exchange part, and the second edge is connected to the inner wall surface of the radiation 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 radiation 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 radiation heat exchange part is arranged above or below the second convection 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 first cylinder and the second cylinder, and the outlet of the condenser is connected to the inlet of the first throttling device and the inlet of the second throttling device; The compression device includes a first compressor having the first cylinder and a second compressor having the second cylinder.

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

5. The air-conditioning system according to claim 2, wherein The radiative-convective heat exchanger further includes a third fan, which is arranged 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 the 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.

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 exchange fins are arranged between every two adjacent heat exchange plates and are arranged in sequence in the radial direction of the radiative heat exchange part.

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

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