Radiant 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 portion, which is in the shape of a cylinder with openings at both ends, configured to absorb heat or cold from its inner wall surface, and radiate heat or cold outward from its outer wall surface; and a convection heat exchange portion, which is arranged on the inner side of the radiation heat exchange portion; and the convection heat exchange portion has a plurality of heat exchange plates, each of which extends along the axial direction of the radiation heat exchange portion, and along the radial direction of the radiation heat exchange portion, and is connected to the inner wall surface of the radiation heat exchange portion; and one or more refrigerant channels are arranged in each of the heat exchange plates. The cylindrical radiation plate bears a part of the heating or cooling load, which can reduce the human body's sense of being blown by the wind and increase the thermal comfort of the human body under the premise of ensuring the heating or cooling capacity; especially when heating in winter, radiation heat exchange can significantly increase the thermal comfort of the human body.

Description

Technical Field

[0001] The invention relates to the field of refrigeration and heating, and in particular to a radiation convection heat exchanger and an air conditioner having the same. Background Art

[0002] Existing heat exchangers for air conditioners, especially indoor heat exchangers, mainly heat or cool the air in the form of forced convection heat exchange, and then transfer the heat or cold to the room or the human body. However, this form of heat transfer by convection heat exchange will reduce the thermal comfort of the human body. Especially when higher heating or cooling capacity is required, the high wind blown out from the air conditioner heat exchanger can easily cause thermal discomfort to the human body. Summary of the invention

[0003] The first aspect of the present invention aims to overcome at least one defect of the existing heat exchanger and provide a radiation convection heat exchanger that can significantly reduce the thermal discomfort of the human body when exchanging heat with the human body or the room.

[0004] A second aspect of the present invention aims to provide an air conditioner having the above-mentioned radiation convection heat exchanger.

[0005] According to a first aspect of the present invention, the present invention provides a radiation convection heat exchanger, comprising:

[0006] a radiation heat exchange portion, the radiation heat exchange portion being in the shape of a cylinder with openings at both ends, configured to absorb heat or cold from its inner wall surface and radiate heat or cold outward from its outer wall surface; and

[0007] The convection heat exchange part is arranged on the inner side of the radiation heat exchange part; and the convection heat exchange part has a plurality of heat exchange plates, each of which extends along the axial direction of the radiation heat exchange part, extends along the radial direction of the radiation heat exchange part, and is connected to the inner wall surface of the radiation heat exchange part; each of the heat exchange plates is provided with one or more refrigerant channels.

[0008] Optionally, each of the refrigerant channels extends along the axial direction of the radiation heat exchange portion; each of the heat exchange plates has a plurality of the refrigerant channels, and the plurality of the refrigerant channels are sequentially arranged along the radial direction of the radiation heat exchange portion.

[0009] Optionally, the plurality of heat exchange plates are evenly distributed along the circumferential direction of the radiation heat exchange portion;

[0010] A plurality of heat exchange fins arranged in sequence along the radial direction of the radiation heat exchange portion are arranged between every two adjacent heat exchange plates.

[0011] Optionally, along the radial direction of the radiation heat exchange portion, the ratio between the number of the refrigerant channels and the number of the heat exchange fins is 4 / 5 to 10 / 1.

[0012] Optionally, along the radial direction of the radiation heat exchange portion, a plurality of the heat exchange fins are arranged at equal intervals.

[0013] Optionally, the cross-sectional profile of each of the refrigerant channels is rectangular or circular;

[0014] The hydraulic radius of each refrigerant channel is 0.1 to 10 mm;

[0015] The number of the refrigerant channels on each of the heat exchange plates is 10 to 50.

[0016] Optionally, the convection heat exchange part is formed by an extrusion process.

[0017] Optionally, the convection heat exchange part and the radiation heat exchange part are integrally formed by an extrusion process.

[0018] Optionally, the convection heat exchange portion defines a central channel extending along the axial direction of the radiation heat exchange portion and is located at the center of the inner space of the radiation heat exchange portion; closed structures are provided at both ends of the central channel.

[0019] According to a second aspect of the present invention, the present invention further provides an air conditioner, comprising an evaporator and a condenser, wherein the evaporator and / or the condenser adopts any one of the above-mentioned radiation convection heat exchangers.

[0020] In the radiation convection heat exchanger and air conditioner of the present invention, since there are a radiation heat exchange part and a convection heat exchange part, the cylindrical radiation plate bears a part of the heating or cooling load, which can reduce the human body's feeling of being blown by the wind and increase the human body's thermal comfort while ensuring the heating or cooling capacity; especially when heating in winter, the radiation heat exchange can significantly increase the human body's thermal comfort.

[0021] Based on 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 aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0023] Figure 1 is a schematic cross-sectional view of a radiation convection heat exchanger according to one embodiment of the present invention. DETAILED DESCRIPTION

[0024] Figure 1 FIG. 1 is a schematic cross-sectional view of a radiation convection heat exchanger according to an embodiment of the present invention. Figure 1As shown, an embodiment of the present invention provides a radiation convection heat exchanger, including a radiation heat exchange part 20 and a convection heat exchange part 30. The radiation heat exchange part 20 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 outward from its outer wall surface. For example, the outer contour of the cross section of the radiation heat exchange part 20 is circular, semicircular, square or fan-shaped. The convection heat exchange part 30 is arranged on the inner side of the radiation heat exchange part 20, and is configured to generate heat or cold, and transfer the heat or cold to the air flowing through the inner side 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 exchanger, and can be directly used as the outer shell.

[0025] When the radiation convection heat exchanger in the embodiment of the present invention is working, the convection heat exchange part 30 generates heat or cold, exchanges heat with the air inside the radiation heat exchange part 20, and exchanges heat 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 to keep the room or the human body warm or cool. The outer wall surface of the radiation heat exchange part 20 can radiate heat or cold to the outside to keep the room or the human body warm or cool. The cylindrical radiation plate bears part of the heating or cooling load, which can reduce the human body's sense of blowing and increase the thermal comfort of the human body under the premise of ensuring the heating or cooling capacity; especially when heating in winter, the radiation heat exchange can significantly increase the thermal comfort of the human body.

[0026] In particular, the countercurrent heat exchange portion 30 includes a plurality of heat exchange plates 31, each of which extends in the axial direction of the radiation heat exchange portion 20 and in the radial direction of the radiation heat exchange portion 20. Each heat exchange plate 31 has a first edge and a second edge extending in the axial direction of the radiation heat exchange portion 20. The first edge is arranged in the middle of the inner space of the radiation heat exchange portion 20, and the second edge is connected to the inner wall surface of the radiation heat exchange portion 20. A refrigerant channel or a plurality of refrigerant channels 32 extending in the length direction or width direction of the heat exchange plate 31 are arranged in each heat exchange plate 31. Preferably, the plurality of heat exchange plates 31 are evenly distributed in the circumferential direction of the radiation heat exchange portion 20.

[0027] In some embodiments of the present invention, a plurality of heat dissipation fins 33 are arranged in sequence along the radial direction of the radiation heat exchange portion 20 between every two adjacent heat exchange plates 31. Each heat dissipation fin 33 is provided with one or more heat dissipation holes to form a hollow structure. Each refrigerant channel 32 extends in the axial direction of the radiation heat exchange portion 20. The plurality of refrigerant channels 32 in each heat exchange plate 31 are arranged in sequence from the first edge to the second edge.

[0028] Along the radial direction of the radiation heat exchange portion 20, the interval between two adjacent heat fins 33 in the plurality of heat 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 fins 33 is different. For example, along the radial direction of the radiation heat exchange portion 20, the plurality of distance values ​​become smaller in sequence, that is, the arrangement of the heat fins 33 is sparse first and then dense.

[0029] Specifically, the multiple heat dissipation fins 33 between every two adjacent heat exchange plates 31 are arranged into multiple groups, each group of heat dissipation fins 33 has at least two heat dissipation fins 33, and the distance between every two adjacent heat dissipation fins 33 in each group of heat dissipation fins 33 is equal to the above-mentioned distance value, so that the interval size between the heat dissipation fins 33 between every two adjacent heat exchange plates 31 has multiple distance values, and two adjacent groups can share one heat dissipation fin 33, that is, use one common heat dissipation fin 33 for grouping.

[0030] In each heat exchange plate 31, multiple refrigerant channels 32 are arranged in sequence from the first edge to the second edge, and the spacing between two adjacent refrigerant channels 32 has one or more spacing values. The multiple spacing values ​​are successively smaller. The multiple refrigerant channels 32 on each heat exchange plate 31 are arranged into multiple groups, each group of refrigerant channels 32 has at least two refrigerant channels 32, and the distance between every two adjacent refrigerant channels 32 in each group of refrigerant channels 32 is equal to one of the above spacing values, so that the spacing between the refrigerant channels 32 on each heat exchange plate 31 has multiple spacing values, and two adjacent groups can share one refrigerant channel 32, that is, grouping is performed using one shared refrigerant channel 32.

[0031] In the direction from the first edge to the second edge, the ratio between the number of refrigerant channels 32 and the number of 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 that arches toward the outside of the radiation heat exchange portion 20. The cross-sectional profile of each refrigerant channel 32 is a rectangle or a circle or other regular or irregular shape. The hydraulic radius of each refrigerant channel 32 is 0.1 to 10 mm; the number of refrigerant channels 32 on each heat exchange plate 31 is 10 to 50. The number of 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, the spacing between two adjacent refrigerant channels 32 is one, that is, multiple 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.

[0032] In some embodiments of the present invention, the convection heat exchange portion 30 defines a central channel 38 extending along the axial direction of the radiation heat exchange portion 20, which is located in the center of the inner space of the radiation heat exchange portion 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 accessories such as a shunt pipe. Each refrigerant channel 32 is preferably a microchannel tube. The heat exchange plate 31 and the radiation heat exchange portion 20 can be made of copper or aluminum.

[0033] In some embodiments of the present invention, in order to facilitate processing and manufacturing, the convection heat exchange part 30 is formed by an extrusion process, that is, the convection heat exchange part is preferably an integrated machined part. Or, the whole formed by the convection heat exchange part 30 and the radiation heat exchange part 20 is formed by an extrusion process. In other words, the whole formed by the convection heat exchange part and the radiation heat exchange part 20 is an integrated machined part. In the extruded integrated machined part, the heat dissipation fins 33 are directly connected to the wall of the refrigerant channel 32 and belong to the same component. There is no problem of contact thermal resistance between the two, which can significantly reduce the heat transfer resistance between the refrigerant and the air and increase the heat exchange performance.

[0034] In some embodiments of the present invention, the refrigerant pipeline also has a main inlet pipe and a main outlet pipe; one end of each refrigerant channel 32 is connected to the main inlet pipe, and the other end is connected to the main outlet pipe, so that multiple refrigerant channels 32 are connected in parallel. In some other embodiments of the present invention, the radiation convection heat exchanger may have at least one parallel unit, and each parallel unit has multiple channel groups. Each channel group has at least one refrigerant channel 32; the head and tail of the multiple 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-mentioned heat exchange plates 31. For example, the number of heat exchange plates 31 is 20, wherein every 5 heat exchange plates 31 constitute 5 channel groups, which are arranged in series in sequence from head to tail, that is, every 5 heat exchange plates 31 constitute a parallel unit, that is, a total of 4 parallel units, and these 4 parallel units are connected in parallel with each other. Furthermore, each heat exchange plate 31 is also provided with a collecting inlet pipe and a collecting outlet pipe at both ends to facilitate the reasonable arrangement of the pipeline.

[0035] The embodiment of the present invention further provides an air conditioner, which may include a compressor, a condenser, a throttling device and an evaporator. The evaporator and / or the condenser adopts the radiation convection heat exchanger in any of the above embodiments. Preferably, only the evaporator adopts the radiation convection heat exchanger in any of the above embodiments. Furthermore, a fan may be provided at one end of the radiation heat exchange portion 20 to force air to enter the inner side of the radiation heat exchange portion 20 and perform heat exchange with the convection heat exchange portion.

[0036] 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 based on 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 radiation convection heat exchanger, It is characterized in that include: A radiation heat exchange portion, the radiation heat exchange portion is in the shape of a cylinder with two ends open, and is configured to absorb heat or cold from its inner wall surface and radiate heat or cold outward from its outer wall surface; and A convection heat exchange portion is arranged on the inner side of the radiation heat exchange portion; and the convection heat exchange portion has a plurality of heat exchange plates, each of which has a first edge and a second edge extending along the axial direction of the radiation heat exchange portion; the first edge is arranged in the middle of the inner space of the radiation heat exchange portion, and the second edge is connected to the inner wall surface of the radiation heat exchange portion; a plurality of refrigerant channels are arranged in each of the heat exchange plates, and each of the refrigerant channels extends along the axial direction of the radiation heat exchange portion; in each of the heat exchange plates, a plurality of refrigerant channels are arranged in sequence from the first edge to the second edge, and the interval between two adjacent refrigerant channels has a plurality of spacing values, and the plurality of spacing values ​​become smaller in sequence.

2. The radiation convection heat exchanger according to claim 1, It is characterized in that The plurality of heat exchange plates are evenly distributed along the circumferential direction of the radiation heat exchange portion; A plurality of heat exchange fins arranged in sequence along the radial direction of the radiation heat exchange portion are arranged between every two adjacent heat exchange plates.

3. The radiation convection heat exchanger according to claim 2, It is characterized in that Along the radial direction of the radiation heat exchange portion, the ratio between the number of the refrigerant channels and the number of the heat exchange fins is 4 / 5 to 10 / 1.

4. The radiation convection heat exchanger according to claim 2, It is characterized in that Along the radial direction of the radiation heat exchange portion, a plurality of heat exchange fins are arranged at equal intervals.

5. The radiation convection heat exchanger according to claim 1, It is characterized in that The cross-sectional profile of each refrigerant channel is rectangular or circular; The hydraulic radius of each refrigerant channel is 0.1 to 10 mm; The number of the refrigerant channels on each of the heat exchange plates is 10 to 50.

6. The radiation convection heat exchanger according to claim 1, It is characterized in that The convection heat exchange part is formed by an extrusion process.

7. The radiation convection heat exchanger according to claim 1, It is characterized in that The convection heat exchange part and the radiation heat exchange part are integrally formed by an extrusion process.

8. The radiation convection heat exchanger according to claim 1, It is characterized in that The convection heat exchange portion defines a central channel extending along the axial direction of the radiation heat exchange portion and is located at the center of the inner space of the radiation heat exchange portion; closed structures are provided at both ends of the central channel.

9. An air conditioner comprising an evaporator and a condenser, It is characterized in that The evaporator and / or the condenser employs the radiation convection heat exchanger according to any one of claims 1 to 8.

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