CN111435017A - Radiant convection heat exchanger and air conditioner having the same - Google Patents

Abstract

The present invention relates to a radiant convection heat exchanger and an air conditioner having the same. Specifically, the radiation convection heat exchanger includes: a radiation heat exchange part, the radiation heat exchange part is in the shape of a cylinder with both ends open, and is configured to absorb heat or cold from its inner wall and radiate heat or cold outward from its outer wall. and a convective heat exchange portion, disposed inside the radiation heat exchange portion, configured to generate heat or cold, and to transfer the heat or cold to the air flowing through the inside of the radiation heat exchange, and to transfer the heat or cold the inner wall surface of the radiation heat exchange part; and the convection heat exchange part includes a refrigerant pipeline and a plurality of heat dissipation fins arranged on the refrigerant pipeline; each heat dissipation fin is a needle fin. On the premise of ensuring the heating or cooling capacity, the wind blowing sensation of the human body can be reduced, and the thermal comfort of the human body can be increased.

Description

Radiant convection heat exchanger and air conditioner having the same

technical field

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

Background technique

The heat exchanger of the existing air conditioner mainly heats or cools the air in the form of forced convection heat exchange, and then transfers the heat or cold to the room or the human body. Thermal comfort, especially when higher heating or cooling capacity is required, the high wind blowing from the heat exchanger of the air conditioner can easily cause thermal discomfort to the human body.

SUMMARY OF THE INVENTION

The purpose of the first aspect of the present invention is to overcome at least one defect of the existing heat exchanger, and to provide a radiation convection heat exchanger, which can significantly reduce the thermal discomfort of the human body when exchanging heat with the human body or room.

The object of the second aspect of the present invention is to provide an air conditioner having the above-mentioned radiation convection heat exchanger.

According to the first aspect of the present invention, the present invention proposes a radiation convection heat exchanger, which includes:

a radiant heat exchange part, the radiant heat exchange part having a cylindrical shape with both ends open, configured to absorb heat or cold from its inner wall and to radiate heat or cold outward from its outer wall; and

The convection heat exchange part is arranged inside the radiation heat exchange part, and is configured to generate heat or cold energy, transfer the heat or cold energy to the air flowing through the inside of the radiation heat exchange part, and transfer the heat or cold energy transferred to the inner wall surface of the radiation heat exchange part; and

The convection heat exchange part includes a refrigerant pipeline and a plurality of cooling fins arranged on the refrigerant pipeline;

Each of the heat dissipation fins is a pin-shaped fin.

Optionally, the refrigerant pipeline includes a plurality of heat exchange plates; each of the heat exchange plates has a first edge and a second edge extending along the axial direction of the radiation heat exchange portion; the first edge arranged in the middle of the inner space of the radiation heat exchange part, the second edge is connected to the inner wall surface of the radiation heat exchange part; a plurality of the heat exchange plates are arranged in sequence along the circumferential direction of the radiation heat exchange part ;

Both sides of each of the heat exchange plates are provided with a plurality of the heat dissipation fins.

Optionally, each of the heat exchange plates is disposed intersecting the radial direction of the radiation heat exchange portion toward the second edge of the heat exchange plate; or

Each of the heat exchange plates extends in the axial direction of the radiation heat exchange portion, and extends in the radial direction of the radiation heat exchange portion.

Optionally, each of the heat dissipation fins is perpendicular to the corresponding heat exchange plate.

Optionally, each of the heat exchange plates has a plurality of first refrigerant passages, and each of the first refrigerant passages extends along the axial direction of the radiation heat exchange portion, and

In each of the heat exchange plates, from the first edge to the direction of the second edge, a plurality of the first refrigerant passages are arranged in sequence;

The cross-sectional profile of each of the first refrigerant passages is rectangular or circular.

Optionally, the refrigerant pipeline includes a plurality of cylindrical structures arranged coaxially, and each of the cylindrical structures is arranged coaxially with the radiation heat exchange part;

The cylindrical structure includes at least one heat exchange cylinder, and one or more second refrigerant passages are provided on the cylinder wall of each of the heat exchange cylinders; and

A fin layer is disposed between every two adjacent cylindrical structures, and each of the fin layers has a plurality of the heat dissipation fins.

Optionally, a fin layer is provided between the outermost cylindrical structure and the inner wall surface of the radiation heat exchange part; or, the outer wall surface of the outermost cylindrical structure and the inner wall surface of the radiation heat exchange part. The wall surface is integrally formed or contacted;

The root of each of the heat dissipation fins is connected to the cylindrical structure on the inner side thereof.

Optionally, the convection heat exchange part is an integral piece, and is formed by extrusion process; or,

The convective heat exchange portion and the radiation heat exchange portion are integrally formed as an integral piece, and are formed by an extrusion process.

According to the 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.

In the radiation convection heat exchanger and the air conditioner of the present invention, because of the radiation heat exchange part and the convection heat exchange part, the cylindrical radiant plate bears a part of the heating or cooling load, and can ensure the heating or cooling capacity under the premise of ensuring the heating or cooling capacity. It reduces the blowing sensation of the human body and increases the thermal comfort of the human body; especially when heating in winter, the radiant heat transfer can significantly increase the thermal comfort of the human body.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic cross-sectional view of a radiant convection heat exchanger according to one embodiment of the present invention;

2 is a schematic cross-sectional view of a partial structure of a radiant convection heat exchanger according to an embodiment of the present invention.

Detailed ways

Figure 1 is a schematic cross-sectional view of a radiant convection heat exchanger according to one embodiment of the present invention. As shown in FIG. 1 , an embodiment of the present invention provides a radiation convection heat exchanger, which includes a radiation heat exchange part 20 and a convection heat exchange part 30 . The radiation heat exchange portion 20 has a cylindrical shape with both ends open, and is configured to absorb heat or cooling from its inner wall and radiate heat or cooling outward from its outer wall. For example, the outer contour of the cross section of the radiation heat exchange part 20 is a circle, a semicircle, a square or a fan shape. The convection heat exchange part 30 is disposed inside the radiation heat exchange part 20, and is configured to generate heat or cold energy, and transfer the heat or cold energy to the air flowing through the inner side of the radiation heat exchange part 20, and to transfer the heat or cold energy to the air passing through the inner side of the radiation heat exchange part 20. 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.

When the radiant convection heat exchanger in the embodiment of the present invention is in operation, the convection heat exchange part 30 generates heat or cold energy, performs heat exchange with the air inside the radiant heat exchange part 20 , and exchanges heat with the inner wall of the radiant heat exchange part 20 . Heat exchange is performed, and the air after heat exchange can flow out of the radiation heat exchange part 20 to keep warm or cool the room or the human body. Cool down. The cylindrical radiant panel bears a part of the heating or cooling load, which can reduce the blowing sensation 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 radiation heat transfer can significantly increase the human body. Thermal comfort.

In particular, as shown in FIG. 1 and FIG. 2 , the convection heat exchange unit 30 includes a refrigerant pipe and radiating fins 35 provided on the refrigerant pipe. Each of the cooling fins 35 is preferably a pin fin.

In some preferred embodiments of the present invention, as shown in FIG. 1 and FIG. 2 , the refrigerant pipeline includes a plurality of heat exchange plates 31 , and each heat exchange plate 31 is provided with a plurality of heat exchange plates 31 along the length direction of the heat exchange plate 31 . Or the first refrigerant channel 32 extending in the width direction. The plurality of heat dissipation fins 35 are attached to the plurality of heat exchange plates 31 .

Further, 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 disposed 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 . The plurality of heat exchange plates 31 are uniformly distributed along the circumferential direction of the radiation heat exchange portion 20 . For example, in some embodiments, each heat exchange plate 31 extends in the axial direction of the radiation heat exchange portion 20 and extends in the radial direction of the radiation heat exchange portion 20 , as shown in FIG. 1 . In other embodiments, each heat exchange plate 31 is disposed intersecting with the radial direction of the radiation heat exchange portion 20 toward the second edge of the heat exchange plate 31 .

In some embodiments of the present invention, a plurality of the heat dissipation fins 35 are provided on both sides of each heat exchange plate 31 , and each heat dissipation fin 35 is perpendicular to the corresponding heat exchange plate 31 . Optionally, the distance between two adjacent heat dissipation fins 35 among the plurality of heat dissipation fins 35 on each side of each heat exchange plate 31 has a plurality of distance values, so that the arrangement density of the plurality of heat dissipation fins 35 is not wait. For example, along the radial direction of the radiation heat exchange portion 20 , the distance values become smaller in sequence, that is, the radiating fins 35 are arranged sparsely and then densely. Specifically, the plurality of heat dissipation fins 35 on each side of each heat exchange plate 31 are arranged in multiple groups, the direction from the corresponding first edge to the second edge, and each group of heat dissipation fins 35 has at least two rows of heat dissipation fins 35 , the distance between every two rows of adjacent radiating fins 35 in each group of radiating fins 35 is equal to the above-mentioned distance value, so that the radiating fins 35 on each side of each heat exchange plate 31 point from the corresponding first edge to the second edge. The distance between the directions has a plurality of distance values, and adjacent two groups can share a row of heat dissipation fins 35 , that is, use a row of common heat dissipation fins 35 for grouping.

Each of the first refrigerant passages 32 extends in the axial direction of the radiation heat exchange portion 20 . In each heat exchange plate 31, in the direction from the first edge to the second edge, a plurality of first refrigerant passages 32 are arranged in sequence, and the interval between two adjacent first refrigerant passages 32 has one or more spacing values . Multiple spacing values decrease in turn. The plurality of first refrigerant passages 32 on each heat exchange plate 31 are arranged in multiple groups, each group of first refrigerant passages 32 has at least two first refrigerant passages 32 , and every two phases in each group of first refrigerant passages 32 The distance between the adjacent first refrigerant passages 32 is equal to the above-mentioned spacing value, so that the interval between the first refrigerant passages 32 on each heat exchange plate 31 has multiple spacing values, and the adjacent two groups can share one first refrigerant. The channels 32 are grouped by using a common first refrigerant channel 32 .

The cross-sectional profile of each first refrigerant passage 32 is rectangular or circular or other regular or irregular shapes. Preferably, the cross-sectional profile of each first refrigerant passage 32 is rectangular or circular. The hydraulic radius of each first refrigerant passage 32 is 0.1-10 mm; the number of the first refrigerant passages 32 on each heat exchange plate 31 is 10-50. 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 distance between two adjacent first refrigerant passages 32 is one, that is, the plurality of first refrigerant passages 32 are arranged at equal intervals.

In other preferred embodiments of the present invention, the refrigerant pipeline of the convection heat exchange part 30 includes one or more cylindrical structures arranged coaxially, and each cylindrical structure is arranged coaxially with the radiation heat exchange part 20 . The cylindrical structure includes at least one heat exchange cylinder, and one or more second refrigerant passages are arranged on the cylinder wall of each heat exchange cylinder.

Further, the cylindrical structure may further include at least one support cylinder, each support cylinder is arranged between two adjacent heat exchange cylinders, or is arranged on the inner side of the innermost heat exchange cylinder, or is arranged on the outermost heat exchange cylinder. and the radiation heat exchange part 20 .

In order to facilitate heat transfer between the convection heat exchange portion 30 and the radiation heat exchange portion 20 , in some embodiments, a fin layer is provided between the outermost cylindrical structure and the inner wall surface of the radiation heat exchange portion 20 . In other embodiments, the outer wall surface of the outermost cylindrical structure and the inner wall surface of the radiation heat exchange part 20 are integrally formed or contacted against each other. The outermost cylindrical structure is preferably a heat exchange cylinder. In some embodiments of the present invention, there are multiple cylindrical structures, a fin layer is also disposed between every two adjacent cylindrical structures, and each fin layer has a plurality of heat dissipation fins 35 .

In some embodiments of the present invention, there are preferably at least two fin layers. In every two adjacent fin layers, the height of the radiating fins 35 on the outer side extending in the radial direction of the radiation heat exchange portion 20 is greater than that of the radiating fins 35 on the inner side extending in the radial direction of the radiation heat exchange portion 20 the height of. The root of each heat dissipation fin 33 is connected to the cylindrical structure inside thereof. Further, the heat dissipation fins 35 may be integrally formed with the corresponding cylindrical structures on the inner side, and the outer side may be in contact with the corresponding cylindrical structures on the outer side. The air flows in the airflow channel between the cooling fins 35, and the total number of the cooling fins 35 should meet the following requirements: the total outer surface of the cooling fins 35 should provide sufficient heat exchange surface for the heat exchange between the air and the refrigerant; The total number of rings in the sheet layer is preferably 1-20.

In some embodiments of the present invention, each of the second refrigerant passages extends along the axial direction of the radiation heat exchange portion 20 . The plurality of second refrigerant passages in the cylinder wall of each heat exchange cylinder are uniformly distributed along the circumferential direction of the heat exchange cylinder. The cross-sections of the plurality of second refrigerant passages in the cylinder wall of each heat exchange cylinder may include circles and polygons, and the polygons may be rectangular or approximately rectangular structures. The circumferential directions of the heat cylinders are alternately arranged in sequence. The hydraulic radius of each second refrigerant channel is 0.6-10 mm.

The cylindrical structure includes at least two heat exchange cylinders. In every two adjacent heat exchange cylinders, the height of each second refrigerant passage on the outer heat exchange cylinder extending in the radial direction of the radiation heat exchange portion 20 is greater than that of each second refrigerant passage on the inner heat exchange cylinder The height extending in the radial direction of the radiation heat exchange portion 20 .

In some embodiments of the present invention, the convection heat exchange portion 30 defines a central channel 38 extending in the axial direction of the radiation heat exchange portion 20 and located in the center of the space inside the radiation heat exchange portion 20 . The central channel 38 may be configured to circulate air or refrigerant. In other embodiments, both ends of the central channel 38 are provided with closed structures, and the central channel 38 can also be configured to be provided with fittings such as a shunt pipe. Each first refrigerant channel 32/second refrigerant channel is preferably a microchannel tube. The heat exchange plate 31 , the heat exchange cylinder, the support cylinder, and the radiation heat exchange part 20 can all be made of copper material or aluminum material. The pin fins allow a greater extension of the outer surface of the refrigerant passage.

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 integral piece. Or, the whole formed by the convection heat exchange part 30 and the radiation heat exchange part 20 is formed by extrusion process. That is to say, the whole of the convection heat exchange part and the radiation heat exchange part 20 constitutes a one-piece workpiece. Extruded one-piece processed parts, the heat dissipation fins 35 are directly connected with the walls of the first refrigerant passage 32/the second refrigerant passage, and belong to the same part. There is no problem of contact thermal resistance between the two, which can significantly reduce refrigerant and air. The heat transfer resistance between them increases the heat transfer performance.

In some embodiments of the present invention, the refrigerant pipeline further has a main inlet pipe and a main outlet pipe; one end of each first refrigerant passage 32/second refrigerant passage is communicated with the main inlet pipe, and the other end is communicated with the main outlet pipe, In order to connect a plurality of first refrigerant passages 32/second refrigerant passages in parallel.

In other embodiments of the invention, the radiant convection heat exchanger may have at least one parallel unit, each parallel unit having a plurality of channel groups. Each channel group has at least one first refrigerant channel 32/second refrigerant channel; 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 heat exchange plate 31 as described above. For example, the number of heat exchange plates 31 is 8, wherein every 2 heat exchange plates 31 constitute 2 channel groups, which are arranged in series in sequence, that is, every 2 heat exchange plates 31 constitute a parallel unit, that is, a total of 4 parallel units , the four parallel units are connected in parallel with each other. Further, both ends of each heat exchange plate 31 are also provided with a collector inlet pipe and a collector outlet pipe, so as to facilitate the rational arrangement of pipelines.

Embodiments of the present invention also provide an air conditioner, which may include a compressor, a condenser, a throttling device, and an evaporator. The evaporator and/or the condenser adopts the radiant convection heat exchanger in any of the above embodiments. Preferably, only the evaporator adopts the radiant convection heat exchanger in any of the above embodiments. Further, a fan may be provided at one end of the radiation heat exchange portion 20 to promote air to enter the inner side of the radiation heat exchange portion 20 to perform heat exchange with the convection heat exchange portion.

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A radiant convective heat exchanger comprising:

a radiant heat exchanging part having a cylindrical shape with both ends open, configured to absorb heat or cold from an inner wall surface thereof, and radiate the heat or cold outward from an outer wall surface thereof; and

a convection heat exchanging part disposed at an inner side of the radiation heat exchanging part, configured to generate heat or cold, and to transfer the heat or cold to air flowing through the inner side of the radiation heat exchanging part and to transfer the heat or cold to an inner wall surface of the radiation heat exchanging part; and is

The heat convection part comprises a refrigerant pipeline and a plurality of radiating fins arranged on the refrigerant pipeline;

each heat dissipation fin is a pin fin.

2. Radiation convection heat exchanger of claim 1,

the refrigerant pipeline comprises a plurality of heat exchange plates; each heat exchange plate has a first edge and a second edge extending in an axial direction of the radiant heat exchange portion; the first edge is arranged in the middle of the space inside the radiation heat exchange part, and the second edge is connected to the inner wall surface of the radiation heat exchange part; the heat exchange plates are sequentially arranged along the circumferential direction of the radiation heat exchange part;

and a plurality of radiating fins are arranged on two sides of each heat exchange plate.

3. Radiation convection heat exchanger of claim 2,

and each heat exchange plate and the radial direction of the radiation heat exchange part facing to the second edge of the heat exchange plate are arranged in a crossed mode.

4. Radiation convection heat exchanger of claim 2,

each heat exchange plate extends along the axial direction of the radiant heat exchange part and extends along the radial direction of the radiant heat exchange part.

5. Radiation convection heat exchanger of claim 2,

each heat dissipation fin is perpendicular to the corresponding heat exchange plate.

6. Radiation convection heat exchanger of claim 5,

each heat exchange plate is internally provided with a plurality of first refrigerant channels, each first refrigerant channel extends along the axial direction of the radiation heat exchange part, and

in each heat exchange plate, the first edge points to the direction of the second edge, and a plurality of first refrigerant channels are arranged in sequence;

the cross section of each first refrigerant channel is rectangular or circular.

7. Radiation convection heat exchanger of claim 1,

the refrigerant pipeline comprises a plurality of coaxially arranged cylindrical structures, and each cylindrical structure is coaxially arranged with the radiation heat exchange part;

the cylindrical structure comprises at least one heat exchange cylinder, and one or more second refrigerant channels are arranged on the wall of each heat exchange cylinder; and is

A fin layer is arranged between every two adjacent cylindrical structures, and each fin layer is provided with a plurality of radiating fins.

8. A radiation convection heat exchanger as set forth in claim 7,

a fin layer is arranged between the cylindrical structure at the outermost side and the inner wall surface of the radiation heat exchange part; or the outer wall surface of the outermost cylindrical structure and the inner wall surface of the radiation heat exchange part are integrally formed or abut against each other in a contact manner;

the root of each radiating fin is connected to the cylindrical structure on the inner side of the radiating fin.

9. Radiation convection heat exchanger of claim 1,

the convection heat exchange part is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the whole formed by the convection heat exchange part and the radiation heat exchange part is an integrated workpiece and is formed by adopting an extrusion process.

10. An air conditioner comprises an evaporator and a condenser, and is characterized in that,

the evaporator and/or the condenser employ the radiation convection type heat exchanger as claimed in claims 1 to 9.

Images