Radiation-convection heat exchanger and air conditioner having the same

Abstract

The present invention relates to a radiation-convection heat exchanger and an air conditioner having the same. Specifically, the radiation-convection heat exchanger includes: a radiation heat exchange part, which is in a cylindrical shape 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; a first convection heat exchange part, which is disposed inside the radiation heat exchange part, and is configured to generate heat or cold, transfer the heat or cold to the air flowing through the inside of the radiation heat exchange part, and transfer the heat or cold to the inner wall surface of the radiation heat exchange part; and a second convection heat exchange part, which is configured to generate heat or cold and perform heat exchange with the air flowing through it; the radiation heat exchange part is disposed above or below the second convection heat exchange part. It is possible to reduce the blowing feeling on the human body and increase the thermal comfort of the human body on the premise of ensuring the heating or cooling capacity. The radiation heat exchange part and the first convection heat exchange part mainly undertake sensible heat combination; the second convection heat exchange part mainly undertakes latent heat load.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration and heating, and particularly to a radiative-convective heat exchanger and an air conditioner having the same. Background Art

[0002] Existing air conditioner 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 conditioner heat exchanger is extremely likely to cause thermal discomfort to the human body. Summary of the Invention

[0003] An object of the first aspect of the present invention is to overcome at least one defect of the existing heat exchanger, and to provide a radiative-convective heat exchanger, which can significantly reduce the thermal discomfort of the human body when exchanging heat with the human body or a room.

[0004] An object of the second aspect of the present invention is to provide an air conditioner having the above-mentioned radiative-convective heat exchanger.

[0005] According to the first aspect of the present invention, the present invention provides a radiative-convective heat exchanger, which includes:

[0006] A radiative heat transfer part, the radiative heat transfer part is in a cylindrical shape 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;

[0007] A first convective heat transfer part, which is arranged inside the radiative heat transfer part, and is configured to generate heat or cold, 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

[0008] A second convective heat transfer part, which is configured to generate heat or cold and perform heat exchange with the air flowing through it;

[0009] The radiative heat transfer part is arranged above or below the second convective heat transfer part.

[0010] Optionally, at least one first refrigerant flow path is provided inside the first convective heat transfer part; at least one second refrigerant flow path is provided in the second convective heat transfer part; at least one of the first refrigerant flow paths and at least one of the second cold quantity flow paths are connected in series, in parallel or in a mixed connection.

[0011] Optionally, the first convective heat transfer part is connected in series with the second convective heat transfer part; and the first convective heat transfer part is arranged upstream of the second convective heat transfer part.

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

[0013] The first blower 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 convective heat exchange part, and then flows out from the other end of the radiation heat exchange part;

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

[0015] Optionally, the radiation-convection heat exchanger further includes: a third blower, which is arranged outside one end of the radiation heat exchange part and is 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 convective 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 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 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; or,

[0019] 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 radiation heat exchange part; a plurality of second refrigerant channels are arranged on the cylinder wall of each heat exchange cylinder.

[0020] According to the second aspect of the present invention, the present invention provides an air conditioner, which includes an evaporator and a condenser, and the evaporator and / or the condenser adopt any one of the above-mentioned radiation-convection heat exchangers.

[0021] Optionally, the air conditioner further includes a compressor and a throttling device; the evaporator adopts any one of the above-mentioned radiation-convection heat exchangers, and the first convective heat exchange part and the second convective heat exchange part are connected in series; and the first convective heat exchange part is arranged upstream of the second convective heat exchange part, the inlet of the first convective heat exchange part is communicated with the outlet of the throttling device, and the outlet of the second convective heat exchange part is communicated with the inlet of the compressor.

[0022] In the radiative-convective heat exchanger and air conditioner of the present invention, since there are a radiative heat exchange part, a first convective heat exchange part and a second convective heat exchange part, the cylindrical radiation plate undertakes part of the heating or cooling load, which 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 during winter heating, the radiative heat exchange can significantly increase the human thermal comfort.

[0023] Furthermore, in the radiative-convective heat exchanger of the present invention, the radiative heat exchange part and the first convective heat exchange part mainly undertake the sensible heat composite; the second convective heat exchange part mainly undertakes the latent heat load.

[0024] Furthermore, the addition of the cylindrical radiation plate can reduce the number of refrigerant pipelines (such as finned tubes).

[0025] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an illustrative 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:

[0027] Figure 1 is a schematic structural diagram of a radiative-convective heat exchanger according to an embodiment of the present invention;

[0028] Figure 2 is Figure 1 a schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the shown radiative-convective heat exchanger;

[0029] Figure 3 is Figure 1 a schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the shown radiative-convective heat exchanger;

[0030] Figure 4 is a schematic cross-sectional view of a partial structure of a radiative-convective heat exchanger according to an embodiment of the present invention;

[0031] Figure 5 is a schematic cross-sectional view of a partial structure of a radiative-convective heat exchanger according to an embodiment of the present invention;

[0032] Figure 6 is Figure 1 a schematic cross-sectional view of the radiative heat exchange part and the first convective heat exchange part in the shown radiative-convective heat exchanger;

[0033] Figure 7 is Figure 1Schematic cross-sectional view of the radiation heat exchange part and the first convection heat exchange part in the shown radiation-convection heat exchanger;

[0034] Figure 8 is Figure 1 Schematic cross-sectional view of the radiation heat exchange part and the first convection heat exchange part in the shown radiation-convection heat exchanger;

[0035] Figure 9 Schematic system diagram of an air conditioner according to an embodiment of the present invention. Detailed implementation manners

[0036] Figure 1 Schematic structural diagram of a radiation-convection heat exchanger according to an embodiment of the present invention. As Figure 1 shown and referring to Figures 2 to 8 , an embodiment of the present invention provides a radiation-convection heat exchanger, which may include a radiation heat exchange part 20, a first convection heat exchange part 30, and a second convection heat exchange part 40. The radiation heat exchange part 20 and the first convection heat exchange part 30 may form a radiation-convection heat exchange part.

[0037] The radiation 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 radiation heat exchange part 20 is circular, semi-circular, square, or fan-shaped. The first convection heat exchange part 30 is disposed inside the radiation heat exchange part 20, configured to generate heat or cold, transfer the heat or cold to the air flowing through the inside of the radiation heat exchange part 20, and transfer the heat or cold to the inner wall surface of the radiation heat exchange part 20. The radiation heat exchange part 20 is located on the outer shell surface of the radiation-convection heat exchange part and can directly serve as the outer shell of the radiation-convection heat exchange part. The second convection heat exchange part 40 is configured to generate heat or cold and perform heat exchange with the air flowing through it. The radiation heat exchange part is disposed above or below the second convection heat exchange part 40. Preferably, the radiation heat exchange part 20 is disposed above the second convection heat exchange part 40.

[0038] When the radiation-convection heat exchanger in the embodiment of the present invention is working, the first convection heat exchange part 30 generates heat or cold, performs heat exchange with the air inside the radiation heat exchange part 20, and performs heat exchange with the inner wall surface of the radiation heat exchange part 20. The air after heat exchange can flow out of the radiation heat exchange part 20 for indoor or human body warming or cooling. The outer wall surface of the radiation heat exchange part 20 can radiate heat or cold to the outside for indoor or human body warming 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 radiation heat exchange can significantly increase the human body thermal comfort. And the radiation heat exchange part 20 and the first convection heat exchange part 30 mainly undertake sensible heat composite; the second convection heat exchange part 40 mainly undertakes latent heat load.

[0039] 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 two circular straight pipe segments; there are a plurality of heat dissipation 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 finned tube heat exchanger. The second convective heat exchange part 40 can be a conventional finned tube heat exchanger.

[0040] In some preferred embodiments of the present invention, as Figure 2 and Figure 3 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 a plurality of heat exchange plates 31.

[0041] 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 2 shown. In some other embodiments, each heat exchange plate 31 is arranged crosswise with the radial direction of the radiative heat exchange part 20 facing the second edge of the heat exchange plate 31, as Figure 3 shown.

[0042] In some embodiments of the present invention, a plurality of heat dissipation fins 33 arranged in sequence along the radial direction of the radiative heat exchange part 20 are provided between every two adjacent heat exchange plates 31, and 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 part 20. The plurality of first refrigerant channels 32 in each heat exchange plate 31 are arranged in sequence from the direction of the first edge pointing to the second edge.

[0043] Along the radial direction of the radiative heat exchange part 20, there are multiple distance values for the intervals between two adjacent heat dissipation fins 33 among the multiple heat dissipation fins 33 between every two adjacent heat exchange plates 31, so that the arrangement density of the multiple heat dissipation fins 33 is different. For example, along the radial direction of the radiative heat exchange part 20, the multiple distance values gradually decrease in sequence, that is, the heat dissipation fins 33 are arranged first sparsely and then densely.

[0044] Specifically, multiple 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 multiple 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.

[0045] In each heat exchange plate 31, in the direction from the first edge to the second edge, multiple first refrigerant channels 32 are arranged in sequence. The interval size between two adjacent first refrigerant channels 32 has one or more spacing values. The multiple spacing values decrease in sequence. The multiple 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 multiple 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.

[0046] 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, the 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.

[0047] In some alternative embodiments of the present invention, as Figure 4 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 flat sheet-like heat dissipation fins 34 are arranged in sequence 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 5As shown, each heat dissipation fin 33 can be a needle-shaped heat dissipation fin 35, and a plurality of needle-shaped 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-shaped heat dissipation fins, irregular-shaped heat dissipation fins, etc., can also be arranged on both sides of each heat exchange plate 31, as can be seen Figure 6 shown. Further, the heat exchange plate 31 is preferably integrally formed with the heat dissipation fin 33.

[0048] In some other preferred embodiments of the present invention, as Figure 7 and Figure 8 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. There are a plurality of heat dissipation fins 33. At least the outer side of the innermost heat exchange cylinder 36 has a plurality of heat dissipation fins 33. For example, both the outer side and the inner side of the innermost heat exchange cylinder 36 have a plurality of heat dissipation fins 33. The inner side of the outermost heat exchange cylinder 36 has a plurality of heat dissipation fins 33; and the outer side 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.

[0049] Further, both the inner side and the outer side 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 and 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 on both sides of the support cylinder.

[0050] Each second refrigerant channel 37 extends along the axial direction of the radiation heat exchange part 20. A plurality of second refrigerant channels 37 inside 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 inside 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 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 arranged on each heat dissipation fin 33.

[0051] In some embodiments of the present invention, the first convective heat exchange part 30 further includes at least one of the above-mentioned support cylinders, each support cylinder is disposed between two adjacent heat exchange cylinders 36, or disposed inside the innermost heat exchange cylinder 36, and there are heat dissipation fins 33 between each support cylinder and the heat exchange cylinder 36 inside or outside thereof. Further, the heat dissipation fins 33 can be integrally formed with the corresponding heat exchange cylinder or support cylinder inside thereof, and the outside can be in contact and abutted against the corresponding heat exchange cylinder or support cylinder outside thereof.

[0052] 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 fins 33 extending along the radial direction of the radiation heat exchange part 20 is greater than the length of the inner heat dissipation fins 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 spacing 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.

[0053] 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 radiation heat exchange part 20, located at the center of the inner space of the radiation 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 radiation heat exchange part 20 can all be made of copper or aluminum materials.

[0054] 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 radiation heat exchange part 20 is formed by an extrusion process. As Figures 2 to 8 shown.

[0055] 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 in parallel.

[0056] In some 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 arranged 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 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 arranged 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 main inlet pipe, and the outlet may be connected to the main outlet pipe.

[0057] In some embodiments of the present invention, the first convective heat exchange part 30 is connected in series with the second convective heat exchange part 40; and the first convective heat exchange part 30 is arranged upstream of the second convective heat exchange part 40. In some alternative embodiments of the present invention, the first convective heat exchange part 30 has at least one first refrigerant flow path; the second convective heat exchange part 40 has at least one second refrigerant flow path; at least one first refrigerant flow path and at least one second refrigerant flow path are connected in series, in parallel or in a combined series-parallel connection.

[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 1 shown, the radiative convective heat exchanger further includes a third fan 50, and the third fan 50 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 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 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] The embodiments of the present invention also provide an air conditioner, as Figure 9As shown, the air conditioner may include a compressor 60, a condenser 70, a throttling device 80, and an evaporator. The evaporator and / or the condenser 70 employs the radiation-convection heat exchanger in any of the above embodiments. Preferably, only the evaporator employs the radiation-convection heat exchanger in any of the above embodiments. Further, the first convection heat exchange part 30 is connected in series with the second convection heat exchange part 40; and the first convection heat exchange part 30 is disposed upstream of the second convection heat exchange part 40, the inlet of the first convection heat exchange part 30 is communicated with the outlet of the throttling device, and the outlet of the second convection heat exchange part 40 is communicated with the inlet of the compressor. The throttling device 80 may be located on the indoor side or the outdoor side.

[0062] When the air conditioner operates, such as during refrigeration, the refrigerant first passes through the first convection heat exchange part 30 and then through the second convection heat exchange part 40; the temperature of the second convection heat exchange part 40 is relatively low and can be used for dehumidification, and the temperature of the first convection heat exchange part 30 is slightly higher and is mainly used for refrigeration. During heating, the first convection heat exchange part 30 transfers heat to the room in the form of thermal radiation and convection heat exchange, and the second convection heat exchange part 40 can be used for spray humidification.

[0063] At this point, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with 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. A radiative-convective heat exchanger, characterized in that, Comprising: A radiation heat exchange part, which is in the shape of a cylinder with openings at both ends, 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; A first convective heat exchange part, which is arranged inside the radiation heat exchange part, and is configured to generate heat or cold, transfer the heat or cold to the air flowing through the inside of the radiation heat exchange part, and transfer the heat or cold to the inner wall surface of the radiation heat exchange part; And A second convective heat exchange part, which is configured to generate heat or cold and exchange heat with the air flowing through it; The radiation heat exchange part is arranged above or below the second convective heat exchange part; The total volume of the refrigerant flow-through space inside the first convective heat exchange part is greater than the total volume of the refrigerant flow-through space inside the second convective heat exchange part, so that the refrigerant flow rate inside the first convective heat exchange part is greater than the refrigerant flow rate inside the second convective heat exchange part; The first convective heat exchange part and the second convective heat exchange part are connected in series; and the first convective heat exchange part is arranged upstream of the second convective heat exchange part; The first convective heat exchange part includes a plurality of heat exchange plates having first refrigerant channels. 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; in each heat exchange plate, in the direction from the first edge to the second edge, a plurality of the 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 radiative-convective heat exchanger according to claim 1, wherein There is at least one first refrigerant flow path inside the first convective heat exchange part; there is at least one second refrigerant flow path in the second convective heat exchange part; At least one of the first refrigerant flow paths and at least one of the second refrigerant flow paths are connected in series, in parallel or in a hybrid connection.

3. The radiative convective heat exchanger according to claim 1, characterized in that, It 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 convective 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 convective heat exchange part.

4. The radiant convection heat exchanger according to claim 1, characterized in that, It further includes: A third fan, which is arranged outside one end of the radiation heat exchange part, and is configured to cause 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 convective heat exchange part, and then flow out from the other end of the radiation heat exchange part; and cause part of the air to flow through the second convective heat exchange part.

5. The radiative-convective heat exchanger according to claim 1, wherein Both the first convective heat exchange part and the second convective heat exchange part adopt a finned tube structure.

6. An air conditioner, comprising an evaporator and a condenser, characterized in that, The evaporator and / or the condenser adopts the radiative-convective heat exchanger according to any one of claims 1 to 5.

7. The air conditioner according to claim 6, characterized in that It further includes a compressor and a throttling device; The evaporator adopts the radiative convection heat exchanger described in claims 1 to 5, and the first convection heat exchange part is connected in series with the second convection heat exchange part; and the first convection heat exchange part is arranged upstream of the second convection heat exchange part, the inlet of the first convection heat exchange part is communicated with the outlet of the throttling device, and the outlet of the second convection heat exchange part is communicated with the inlet of the compressor.

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