CN212058426U

CN212058426U - Heat exchanger

Info

Publication number: CN212058426U
Application number: CN202020454286.1U
Authority: CN
Inventors: 童仲尧
Original assignee: Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Current assignee: Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-01
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses a heat exchanger, the heat exchanger includes first pipe, second pipe and a plurality of heat exchange tubes, and a plurality of heat exchange tubes include first heat exchange tube and the second heat exchange tube that quantity is less than first heat exchange tube, at least part body of first heat exchange tube is by panel fold forming, the body of second heat exchange tube is formed by one shot forming processing, first pipe includes two at least terminal surfaces, the second heat exchange tube includes relative first side and the second side of arranging on the length direction of first pipe, the first side of second heat exchange tube with distance between a terminal surface of first pipe be less than the first side of this second heat exchange tube with distance between another terminal surface of first pipe. The utility model discloses a heat exchanger can improve the welding quality of heat exchanger.

Description

Heat exchanger

Technical Field

The utility model relates to a heat transfer technical field, more specifically relates to a heat exchanger.

Background

In the related art, a multichannel heat exchanger includes collecting pipes, a plurality of heat exchange tubes connected between two collecting pipes, and fins provided between adjacent heat exchange tubes. According to the knowledge of the inventor, a heat exchange tube applied to a multi-channel heat exchanger is formed by folding a plate, a brazing layer is arranged on the surface of the heat exchange tube, and the brazing layer is melted in the welding process of the heat exchanger, so that the thickness of the heat exchange tube is reduced, a smaller welding gap cannot be achieved through compression, and the welding quality of the heat exchanger is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a heat exchanger, this heat exchanger can improve the welding quality of heat exchanger.

According to the utility model discloses a heat exchanger of embodiment of first aspect includes: the first pipe and the second pipe are arranged at intervals; a plurality of heat exchange tubes arranged at intervals in a length direction of the first tube, one end portion of the heat exchange tube being inserted into the first tube to be connected to the first tube, the other end portion of the heat exchange tube being inserted into the second tube to be connected to the second tube, the heat exchange tube including a channel communicating the first tube and the second tube, the plurality of heat exchange tubes including a plurality of first heat exchange tubes and at least one second heat exchange tube, at least a part of a tube body of the first heat exchange tube being formed by folding a sheet material, a tube body of the second heat exchange tube being processed by one-time forming, the number of the second heat exchange tubes being smaller than the number of the first heat exchange tubes, the second heat exchange tubes being arranged at intervals with the first heat exchange tubes in the length direction of the first tube, the first tube including at least two end faces in the length direction thereof, the second heat exchange tube comprises a first side surface and a second side surface which are oppositely arranged in the length direction of the first tube, and the distance between the first side surface of at least one second heat exchange tube and one end surface of the first tube is smaller than the distance between the first side surface of the second heat exchange tube and the other end surface of the first tube.

According to the utility model discloses a heat exchanger, through set up at least part body between first pipe and second pipe by the first heat exchange tube of panel fold forming and the second heat exchange tube that the body formed by one shot forming processing, the quantity of first heat exchange tube is more than the second heat exchange tube, and the distance between the first side of second heat exchange tube and the terminal surface of first pipe is compared in the distance between the first side of this second heat exchange tube and another terminal surface of this first pipe little, in other words, a terminal surface of the neighbouring first pipe of this second heat exchange tube. Compared with the heat exchanger in the prior art, the heat exchange tube is a heat exchanger formed by folding plates, and the welding quality of the heat exchanger is improved.

In some embodiments the ratio of the distance from the first side of the second heat exchange tube to the one end face of the first tube to the length of the first tube is less than or equal to 1: 5.

In some embodiments, the at least two end surfaces of the first tube include a first end surface and a second end surface, the number of the second heat exchange tubes is at least two, a distance between a first side surface of one of the second heat exchange tubes and the first end surface of the first tube is smaller than a distance between the first side surface of the one of the second heat exchange tubes and the second end surface of the first tube, and the one of the second heat exchange tubes is located at one outermost side of the plurality of heat exchange tubes in the length direction of the first tube; the distance between the first side surface of the other second heat exchange tube and the second end surface of the first tube is smaller than the distance between the first side surface of the other second heat exchange tube and the first end surface of the first tube, and the other second heat exchange tube is positioned at the other outermost side of the heat exchange tubes in the length direction of the first tube.

In some embodiments, the heat exchanger further comprises a solid plate, one end of the solid plate is connected to the first tube, the other end of the solid plate is connected to the second tube, the solid plate and the first heat exchange tube are arranged at a distance in the length direction of the first tube, the solid plate and the second heat exchange tube are arranged at a distance in the length direction of the first tube, the solid plate comprises a first side surface and a second side surface which are oppositely arranged in the length direction of the first tube, and the distance between the first side surface of the solid plate and one end surface of the first tube is smaller than the distance between the first side surface of the solid plate and the other end surface of the first tube.

According to the utility model discloses a heat exchanger of the embodiment of second aspect includes: the first pipe and the second pipe are arranged at intervals; a plurality of heat exchange tubes arranged at intervals in a length direction of the first tube, one end portions of the heat exchange tubes being inserted into the first tube to be connected to the first tube, the other end portions of the heat exchange tubes being inserted into the second tube to be connected to the second tube, the heat exchange tubes including channels communicating the first tube and the second tube, the plurality of heat exchange tubes including a plurality of first heat exchange tubes and at least one second heat exchange tube, at least a part of tube bodies of the first heat exchange tubes being formed by folding a sheet material, tube bodies of the second heat exchange tubes being formed by one-time forming processing, the number of the second heat exchange tubes being smaller than the number of the first heat exchange tubes, the second heat exchange tubes being arranged at intervals with the first heat exchange tubes in the length direction of the first tube, the first tube including first segments and second segments, the first segments and the second segments of the first tube being spaced apart in the length direction of the first tube by first spacers, the first spacer comprises a first side surface and a second side surface which are oppositely arranged in the length direction of the first tube, the first tube comprises a first end surface and a second end surface, the first section of the first tube comprises the first end surface of the first tube, the first section of the first tube comprises an opening, at least one second heat exchange tube is connected with the first section of the first tube, the second heat exchange tube comprises a first side surface and a second side surface which are oppositely arranged in the length direction of the first tube, and the distance between the first side surface of the at least one second heat exchange tube and the first end surface of the first tube is smaller than the distance between the first side surface of the second heat exchange tube and the first side surface of the first spacer.

According to the utility model discloses heat exchanger, through set up at least partly rich ampere between first pipe and second pipe and carry the second heat exchange tube that is formed by sheet material fold forming's first heat exchange tube and body and quantity are less than first heat exchange tube by one shot forming processing, and first pipe includes first section and the second part that separates through first distance piece, and wherein the first section of first pipe includes the first terminal surface of this first pipe, and at least one second heat exchange tube links to each other with the first section of first pipe, at least one distance between the first side of second heat exchange tube and the first terminal surface of first pipe is less than the distance between the first side of this second heat exchange tube and the first side of first distance piece. Compared with the heat exchanger in the prior art, the heat exchange tube is a heat exchanger formed by folding plates, and the welding quality of the heat exchanger can be improved.

In some embodiments, the ratio of the distance from the first side of the second heat exchange tube to the first end face of the first tube to the length of the first tube is less than or equal to 1: 2.

In some embodiments, the channels of the heat exchange tubes have cross-sections, and the sum of the cross-sectional areas of the channels of the first heat exchange tube is greater than or less than the sum of the cross-sectional areas of the channels of the second heat exchange tube.

In some embodiments, the second section of the first tube comprises a second end surface of the first tube, the second section of the first tube comprises an opening, the second heat exchange tubes are multiple, at least one second heat exchange tube is connected with the first section of the first tube, a distance between a first side surface of the at least one second heat exchange tube and the first end surface of the first tube is smaller than a distance between a first side surface of the second heat exchange tube and the first side surface of the first spacer, at least one other second heat exchange tube is connected with the second section of the first tube, and a distance between a second side surface of the at least one other second heat exchange tube and the second end surface of the first tube is smaller than a distance between a second side surface of the second heat exchange tube and the second side surface of the first spacer.

In some embodiments, the second tube includes a first section and a second section, the first section of the second tube is spaced apart from the first section of the first tube in a length direction of the first tube, the first section and the second section of the second tube are spaced apart in the length direction of the second tube by a second spacer, the second spacer includes a first side surface and a second side surface oppositely disposed in the length direction of the first tube, the second tube includes a first end surface and a second end surface, the first section of the second tube includes a first end surface of the second tube, the first section of the second tube includes an opening, the second heat exchange tube is plural, at least one second heat exchange tube is connected to the first section of the first tube, and a distance between the first side surface of the at least one second heat exchange tube and the first end surface of the first tube is smaller than a distance between the first side surface of the second heat exchange tube and the first side surface of the first spacer, at least one other second heat exchange tube is connected with the first section of the second tube, and the distance between the second side surface of the at least one other second heat exchange tube and the second end surface of the second tube is smaller than the distance between the second side surface of the second heat exchange tube and the second side surface of the second spacer.

In some embodiments, the channels of the second heat exchange tubes have cross-sections, and the sum of the cross-sectional areas of the channels of at least one of the second heat exchange tubes is greater than or less than the sum of the cross-sectional areas of the channels of at least one other of the second heat exchange tubes.

In some embodiments, the heat exchanger further comprises a solid plate, one end of the solid plate is connected to the first section of the first tube, the other end of the solid plate is connected to the second tube, the solid plate and the first heat exchange tube are arranged at a distance in the length direction of the first tube, the solid plate comprises a first side face and a second side face which are oppositely arranged in the length direction of the first tube, and the distance between the first side face of the solid plate and the first end face of the first tube is smaller than the distance between the first side face of the solid plate and the first side face of the first spacer.

In some embodiments, the heat exchange tube comprises first and second sides disposed in opposing parallel and third and fourth sides disposed in opposing parallel, the distance between the first and second sides of the heat exchange tube being less than the distance between the third and fourth sides of the heat exchange tube, the second heat exchange tube having a thickness greater than the thickness of the first heat exchange tube.

Drawings

Fig. 1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention.

Fig. 2 is a front view of the heat exchanger of fig. 1.

Fig. 3 is a cross-sectional view of the heat exchanger of fig. 1.

Fig. 4 is a schematic structural diagram of a heat exchanger according to another embodiment of the present invention.

Fig. 5 is a front view of the heat exchanger of fig. 4.

Fig. 6 is a cross-sectional view of the heat exchanger of fig. 4.

Fig. 7 is a cross-sectional view of a heat exchanger according to yet another embodiment of the present invention.

Reference numerals:

the heat exchanger comprises a first pipe 1, a second pipe 2, a first section 11 of the first pipe or the second pipe, a second section 12 of the first pipe or the second pipe, a heat exchange pipe 3, a first heat exchange pipe 31, a second heat exchange pipe 32, a fin 4 and a first spacer 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element holder referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

A heat exchanger according to an embodiment of an aspect of the present invention is described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, a heat exchanger according to an embodiment of the present invention includes a first tube 1, a second tube 2, and a plurality of heat exchange tubes 3. The first tube 1 and the second tube 2 are arranged at intervals. As shown in fig. 2, the first pipe 1 and the second pipe 2 are spaced apart in the up-down direction. Specifically, the first tube 1 and the second tube 2 are arranged in parallel. As shown in fig. 1, the first pipe 1 and the second pipe 2 each extend substantially in the left-right direction, i.e., the longitudinal direction of the first pipe 1 and the longitudinal direction of the second pipe 2 are both in the left-right direction.

A plurality of heat exchange tubes 3 are arranged at intervals along the length direction of the first tube 1. As shown in fig. 2, a plurality of heat exchange tubes 3 are arranged at intervals in the left-right direction. Specifically, a plurality of heat exchange tubes 3 are arranged in parallel with each other, as shown in fig. 2, the length directions of the plurality of heat exchange tubes 3 are substantially uniform, and the length directions of the heat exchange tubes 3 are the up-down directions.

One end of the heat exchange tube 3 is inserted into the first tube 1 to be connected to the first tube 1, the other end of the heat exchange tube 3 is inserted into the second tube 2 to be connected to the second tube 2, and the heat exchange tube 3 includes a channel communicating the first tube 1 and the second tube 2. As shown in fig. 2, each heat exchange tube 3 has a lower end inserted into the first tube 1 to be connected to the first tube 1, and an upper end inserted into the second tube 2 to be connected to the second tube 2, thereby communicating the first tube 1 and the second tube 2 through the plurality of heat exchange tubes 3.

As shown in fig. 3, the plurality of heat exchange tubes 3 includes a plurality of first heat exchange tubes 31 and at least one second heat exchange tube 32, wherein at least a part of the tubes of the first heat exchange tubes 31 are formed by folding a plate material, and are referred to as folded flat tubes in the art; the tube body of the second heat exchange tube 32 is formed by one-step forming process, and is referred to as an extruded flat tube in the art. The number of the second heat exchanging pipes 32 is smaller than that of the first heat exchanging pipes 31, and the second heat exchanging pipes 32 are spaced apart from the first heat exchanging pipes 31 in the length direction of the first pipe 1. As shown in fig. 3, the heat exchanger includes folding flat tubes and extruding flat tubes, and the number of the extruding flat tubes is smaller than that of the folding flat tubes.

The first tube 1 includes at least two end surfaces, the second heat exchange tube 32 includes a first side surface and a second side surface oppositely arranged in a length direction of the first tube 1, and a distance between the first side surface of the second heat exchange tube 32 and one end surface of the first tube 1 is smaller than a distance between the first side surface of the second heat exchange tube 32 and the other end surface of the first tube 1. As shown in fig. 2 and 3, the number of the second heat exchange tubes 32 is two, and the second heat exchange tubes 32 include left and right side surfaces which are oppositely arranged, wherein the distance between the left side surface of one second heat exchange tube 32 and the left end surface of the first tube 1 in the left-right direction is smaller than the distance between the left side surface of the second heat exchange tube 32 and the right end surface of the first tube 1 in the left-right direction, that is, the one second heat exchange tube 32 is connected with the left side of the first tube 1; the distance in the left-right direction between the left side surface of the other second heat exchange tube 32 and the right end surface of the first tube 1 is smaller than the distance in the left-right direction between the left side surface of the other second heat exchange tube 32 and the left end surface of the first tube 1, that is, the other second heat exchange tube 32 is connected to the left side of the first tube 1.

According to the utility model discloses a heat exchanger, through set up at least some body between first pipe 1 and second pipe 2 by the first heat exchange tube 31 of panel fold forming and the second heat exchange tube 32 that body one shot forming processing formed, the quantity of first heat exchange tube 31 is more than second heat exchange tube 32, and the distance between the first side of second heat exchange tube 32 and a terminal surface of first pipe 1 is less than the distance between the first side of this second heat exchange tube 32 and another terminal surface of first pipe 1. Compared with the heat exchanger in the prior art, the heat exchange tube is a heat exchanger formed by folding plates, and the welding quality of the heat exchanger is improved.

In some embodiments, the ratio of the distance between the first side of the second heat exchange tube 32 to the one end face of the first tube 1 to the length of the first tube 1 is 1:5 or less.

As shown in fig. 2 and 3, the distance in the left-right direction between the left side surface of one second heat exchange tube 32 located on the left side and the left end surface of the first tube 1 occupies 0 (excluding) -20% (including) of the length of the first tube 1, and the distance in the left-right direction between the left side surface of the other second heat exchange tube 32 located on the right side and the right end surface of the first tube 1 occupies 0 (excluding) -20% (including) of the length of the first tube 1. Thereby, the welding quality of the heat exchanger can be improved by controlling the position of the second heat exchanging pipe 32 within the above range of the first pipe 1.

In some embodiments, the at least two end faces of the first tube 1 include a first end face and a second end face, the number of the second heat exchange tubes 32 is at least two, a distance between a first side face of one second heat exchange tube 32 and the first end face of the first tube 1 is smaller than a distance between the first side face of the one second heat exchange tube 32 and the second end face of the first tube 1, and the one second heat exchange tube 32 is located at one outermost side of the plurality of heat exchange tubes 3 in the length direction of the first tube; the distance between the first side face of the other second heat exchange tube 32 and the second end face of the first tube 1 is smaller than the distance between the first side face of the other second heat exchange tube 32 and the first end face of the first tube 1, and the other second heat exchange tube 32 is located on the other outermost side of the plurality of heat exchange tubes 3 in the length direction of the first tube 1.

As shown in fig. 2 and 3, among the plurality of heat exchange tubes 3, there are two second heat exchange tubes 32 and a plurality of first heat exchange tubes 31, one second heat exchange tube 32 being located at the leftmost side among the plurality of heat exchange tubes 3, and the other heat exchange tube 32 being located at the rightmost side among the plurality of heat exchange tubes 3. In other words, the second heat exchange tubes 32 are disposed at both sides of the heat exchanger. The second heat exchange tubes 32 are thus installed on both sides of the heat exchanger so that no internal erosion occurs due to the high temperature in this region. And when the second heat exchange tubes 32 are installed on both sides of the heat exchanger, the number of the second heat exchange tubes 32 can be adjusted according to the welding process, thereby solving the problem of internal erosion caused by the higher temperature in the area.

In some embodiments, the heat exchanger further comprises a solid plate (not shown), one end of which is connected to the first tube 1, the other end of which is connected to the second tube 2, the solid plate is arranged at a distance from the first heat exchange tube 31 in the length direction of the first tube 1, the solid plate is arranged at a distance from the second heat exchange tube 32 in the length direction of the first tube 1, the solid plate comprises a first side surface and a second side surface which are oppositely arranged in the length direction of the first tube 1, and the distance between the first side surface of the solid plate and one end surface of the first tube 1 is smaller than the distance between the first side surface of the solid plate and the other end surface of the first tube 1. For example, the length direction of the solid plate coincides with the length direction of the heat exchange tube 3 and is the up-down direction, the lower end portion of the solid plate is inserted into the first tube 1 to be connected with the first tube 1, and the upper end portion of the solid plate is inserted into the second tube 2 to be connected with the second tube 2. The solid plates are arranged in parallel and spaced apart from the first heat exchange pipe 31 in the left-right direction, and/or in parallel and spaced apart from the second heat exchange pipe 32 in the left-right direction.

In some embodiments, as shown in fig. 1 and 2, the heat exchanger further comprises fins 4, the fins 4 being provided between adjacent heat exchange tubes 3 in the length direction of the first tube 1. The arrangement of the fins 4 can improve the heat exchange area of the two adjacent heat exchange tubes 1, and the heat exchange efficiency of the heat exchanger is improved. In addition, by providing the first heat exchange tube 31 having at least a part of the tube body formed by folding a plate and the second heat exchange tube 32 having a tube body formed by one-step forming between the first tube 1 and the second tube 2, it is also possible to improve the welding quality of the first heat exchange tube 31 and the fin 4 by reducing the fitting clearance caused by the height reduction of the first heat exchange tube 31 having a plate folded shape.

Specifically, the second heat exchange tubes 32 adjacent in the length direction of the first tubes 1 are spaced apart by the fins 4 and the first heat exchange tubes 31, and/or the second heat exchange tubes 32 adjacent in the length direction of the first tubes 1 are spaced apart by only the fins 4.

In some embodiments, the heat exchange tube 3 comprises first and second sides arranged in opposite and parallel and third and fourth sides arranged in opposite and parallel, the distance between the first and second sides of the heat exchange tube 3 being smaller than the distance between the third and fourth sides of the heat exchange tube. In other words, the heat exchange tube 3 has a width and a thickness, and the heat exchange tube 3 includes a first side and a second side which are arranged oppositely and in parallel in a thickness direction thereof, wherein a distance between the first side and the second side is the thickness of the heat exchange tube 3. The heat exchange tube 3 further comprises a third side and a fourth side which are arranged in parallel and are opposed in the width direction thereof, wherein the distance between the third side and the fourth side is the width of the heat exchange tube 3. In other words, the heat exchange tubes 3 are what is known in the art as flat tubes.

As shown in fig. 1 to 3, the first heat exchange tube 31 and the second heat exchange tube 32 each have a width and a thickness, and each heat exchange tube 3 has a width greater than a thickness. The thickness direction of the first heat exchange tube 31 is the same as the thickness direction of the second heat exchange tube 32 and is the left-right direction, and the width direction of the first heat exchange tube 31 is the same as the width direction of the second heat exchange tube 32 and is the direction perpendicular to the left-right direction and the up-down direction.

In some specific embodiments, the thickness of the second heat exchange tube 32 may be slightly greater than that of the first heat exchange tube 31, which may further reduce the distortion of the heat exchanger and improve the quality of the heat exchanger. Specifically, the tube wall and the internal reinforcing ribs of the second heat exchange tube 32 are thickened, so that the strength of the second heat exchange tube 32 is increased, and the strength of the whole heat exchanger is improved.

In some embodiments, the heat exchanger further comprises a tube sleeve (not shown) disposed outside the second heat exchange tube 32 and between the first tube 1 and the second tube 2. Specifically, the pipe sleeve is an aluminum pipe sleeve, and the length of the aluminum pipe sleeve is less than or equal to the distance between the first pipe 1 and the second pipe 2, so that the second heat exchange pipe 32 can be protected, the welding quality of the second heat exchange pipe 32 and the first pipe 1 and/or the second pipe 2 can be improved, and the quality of the heat exchanger can be improved.

In some embodiments, the second heat exchange tube 32 comprises a first section, an intermediate section, and a second section, the first section of the second heat exchange tube 32 being inserted into the first tube 1, and the second section of the second heat exchange tube 32 being inserted into the second tube 2. In other words, the second heat exchange tube 32 has an intermediate section between the first tube 1 and the second tube 2, and a second section inserted into the first tube 1 and the second tube 2.

The thickness of the first section of the second heat exchange tube 32 is less than the thickness of the middle section of the second heat exchange tube 32, and the thickness of the second section of the second heat exchange tube 32 is less than the thickness of the middle section. The thickness of the middle section of the second heat exchange tube 32 is properly increased, so that the effect of pressing the fins 4 can be achieved, and the welding quality of the heat exchange tube 3 and the fins 4 is improved.

A heat exchanger according to an embodiment of another aspect of the present invention is described below with reference to fig. 4 to 7.

As shown in fig. 4 to 7, a heat exchanger according to an embodiment of the present invention includes a first tube 1, a second tube 2, and a plurality of heat exchange tubes 3. The first tube 1 and the second tube 2 are arranged at intervals. As shown in fig. 5, the first pipe 1 and the second pipe 2 are spaced apart in the up-down direction. Specifically, the first tube 1 and the second tube 2 are arranged in parallel. As shown in fig. 5, the first pipe 1 and the second pipe 2 each extend substantially in the left-right direction, that is, both the longitudinal direction of the first pipe 1 and the longitudinal direction of the second pipe 2 are in the left-right direction.

A plurality of heat exchange tubes 3 are arranged at intervals along the length direction of the first tube 1. As shown in fig. 5, a plurality of heat exchange tubes 3 are arranged at intervals in the left-right direction. Specifically, a plurality of heat exchange tubes 3 are arranged in parallel with each other, and as shown in fig. 5, the length directions of the plurality of heat exchange tubes 3 are substantially uniform, and the length directions of the heat exchange tubes 3 are the up-down directions.

One end of the heat exchange tube 3 is inserted into the first tube 1 to be connected to the first tube 1, and the other end of the heat exchange tube 3 is inserted into the second tube 2 to be connected to the first tube 1. The heat exchange tube 3 includes a channel communicating the first tube 1 and the second tube 2. As shown in fig. 5, each heat exchange tube 3 has a lower end inserted into the first tube 1 to be connected to the first tube 1, and an upper end inserted into the second tube 2 to be connected to the second tube 2, thereby communicating the first tube 1 and the second tube 2 through the plurality of heat exchange tubes 3.

As shown in fig. 6 and 7, the plurality of heat exchange tubes 3 includes a plurality of first heat exchange tubes 31 and at least one second heat exchange tube 32, at least a part of the tubes of the first heat exchange tubes 31 are folded and formed from a plate material, and are referred to as folded flat tubes in the art; the tube body of the second heat exchange tube 32 is formed by one-step forming process, and is referred to as an extruded flat tube in the art. The number of the second heat exchanging pipes 32 is smaller than that of the first heat exchanging pipes 31, and the second heat exchanging pipes 32 are spaced apart from the first heat exchanging pipes 31 in the length direction of the first pipe 1. As shown in fig. 6 and 7, the heat exchanger includes the folding flat tubes and the extruding flat tubes, and the number of the extruding flat tubes is smaller than that of the folding flat tubes.

The first pipe 1 comprises a first section 11 and a second section 12, the first section 11 and the second section 12 of the first pipe 1 being spaced apart in the length direction of the first pipe 1 by a first spacer 5. In other words, the first spacer 5 is provided between the first section 11 and the second section 12 of the first tube 1 so that the first section 11 and the second section 12 are not directly communicated in the length direction of the first tube 1, and the heat exchanger includes at least two flow paths. Wherein the first spacer 5 comprises a first side and a second side arranged opposite each other in the length direction of the first tube 1.

The first tube 1 comprises a first end face and a second end face, and the first section 11 of the first tube 1 comprises the first end face of the first tube 1. The first section 11 of the first tube 1 comprises an opening. At least one second heat exchange tube 32 is connected to the first section 11 of the first tube, the second heat exchange tube 32 including first and second side surfaces oppositely arranged in the length direction of the first tube 1, and the distance between the first side surface of the at least one second heat exchange tube 32 and the first end surface of the first tube 1 is smaller than the distance between the first side surface of the second heat exchange tube 32 and the first side surface of the first spacer 5.

As shown in fig. 6 and 7, the first pipe 1 includes a first segment 11 and a second segment 12 that are connected in sequence from right to left, and the first segment 11 and the second segment 12 are spaced apart by a first spacer 5. The outer end face of the first segment 11 is the right end face of the first tube 1. The first section 11 of the first tube 1 includes an opening, the second heat exchange tube 32 includes left and right side surfaces, and the first spacer 5 includes left and right side surfaces. Wherein there is at least one second heat exchange tube 32 whose distance between the right side surface thereof and the right end surface of the first tube 1 is smaller than the distance between the right side surface of the second heat exchange tube 32 and the right side surface of the first spacer 5.

It will be appreciated that the present application is not limited to the case where the first pipe 1 comprises only two segments as shown in fig. 6 and 7, for example, the second segment 12 of the first pipe 1 comprises a plurality of sub-segments, adjacent ones of which are spaced apart by the first spacers 5; or the first pipe 1 further comprises a third section and/or a fourth section and the like, and every two adjacent sections in the first pipe 1 are separated by the first spacing piece 5.

According to the heat exchanger of the embodiment of the present invention, by disposing the first heat exchanging pipe 31 in which at least a part of the pipe body is folded and formed of a plate material and the second heat exchanging pipe 32 in which the pipe body is formed by one-time forming and processing and the number of the pipe bodies is smaller than that of the first heat exchanging pipe 31 between the first pipe 1 and the second pipe 2, and the first tube 1 of the first and second tubes 1, 2 comprises a first section 11 and a second section 12 separated by a first spacer 5, wherein the first section 11 of the first tube 1 comprises one end face of the first tube 1, at least one second heat exchange tube 32 is connected to the first section 11 of the first tube 1, and a distance between one side surface of the at least one second heat exchange tube 32 and the one end surface of the first tube 1 is smaller than a distance between the second heat exchange tube 32 and one side surface of the first spacer 5, in other words, the at least one second heat exchange tube 32 is disposed adjacent to the one end surface of the first tube 1. Compared with the heat exchanger in the prior art, the heat exchange tube is a heat exchanger formed by folding plates, and the welding quality of the heat exchanger can be improved.

In some embodiments, the ratio of the distance from the first side of the second heat exchange tube 32 to the first end face of the first tube 1 to the length of the first tube 1 is less than or equal to 1: 2. As shown in fig. 6 and 7, the first tube 1 includes a first stage 11, and an opening is provided at the first stage 11 of the first tube 1, the outer end face of the first stage 11 is the right end face of the first tube 1, and the distance from the right side face of the second heat exchange tube 32 to the right end face of the first tube 1 in the left-right direction occupies 0 (excluding) -50% (including) of the length of the first tube 1.

In some embodiments, the channels of the heat exchange tubes 3 have cross-sections, and the sum of the cross-sectional areas of the channels of the first heat exchange tube 31 is greater than or less than the sum of the cross-sectional areas of the channels of the second heat exchange tube 32.

In some embodiments, the second section 12 of the first tube 1 comprises a second end face of the first tube 1, the second section 12 of the first tube 1 also comprising an opening. Thus, the heat exchanger comprises an even number of passes. Specifically, the first pipe 1 is constituted by connecting a first segment 11 and a second segment 12 in this order from right to left. The first tube 1 comprises two openings 101, one opening 101 being a refrigerant inlet and being arranged at the second section 12 of the first tube 1, and the other opening 101 being a refrigerant outlet and being arranged at the first section 11 of the first tube 1.

In some specific embodiments, the second heat exchange tube 32 is plural, and the plural second heat exchange tubes 32 are connected to the first section 11 of the first tube 1 and are arranged at intervals from each other in the length direction of the first tube 1. As shown in fig. 6, a plurality of second heat exchange tubes 32 are connected to the first section 11 of the first tube 11 at a distance from each other in the left-right direction, and the distance between the right side surface of at least one of the plurality of second heat exchange tubes 32 and the right end surface of the first tube 1 is smaller than the distance between the right side surface of the second heat exchange tube 32 and the right side surface of the first spacer 5.

When the heat exchanger is used as a condenser, the sum of the cross-sectional areas of the channels of the second heat exchange tube 32 is smaller than the sum of the cross-sectional areas of the channels of the first heat exchange tube 31. The refrigerant on the refrigerant outlet side is condensed into a liquid phase, and the flow resistance is relatively small, so that the sum of the cross-sectional areas of the channels of the second heat exchange tubes 32 provided on the refrigerant outlet side of the first tubes 1 is relatively small. Wherein, the channel of the second heat exchange tube 32 can be provided with a turbulent flow structure, which improves the heat exchange efficiency. In addition, the width of the second heat exchange pipe 32 may be smaller than that of the first heat exchange pipe 31, and the thickness of the second heat exchange pipe 32 may also be smaller than that of the first heat exchange pipe 31. Therefore, the product cost can be reduced while the system performance is ensured.

When the heat exchanger is used as an evaporator, the sum of the cross-sectional areas of the channels of the second heat exchange tube 32 is larger than the sum of the cross-sectional areas of the channels of the first heat exchange tube 31. The refrigerant at the refrigerant outlet side is condensed into a gaseous state, and the circulation resistance is large, so that the sum of the cross sectional areas of the channels of the second heat exchange tubes 32 arranged at the refrigerant outlet side of the first tube 1 is relatively large, the whole circulation resistance of the heat exchanger is reduced, and the heat exchange efficiency is improved. In addition, the width of the second heat exchange pipe 32 may be greater than that of the first heat exchange pipe 31, and the thickness of the second heat exchange pipe 32 may also be greater than that of the first heat exchange pipe 31.

The arrangement of the second heat exchange tubes 32 of the present application is not limited to the embodiment shown in fig. 6, for example, in other embodiments, the second heat exchange tubes 32 are plural, at least one second heat exchange tube 32 is connected to the first section 11 of the first tube 1, and the distance between the first side of the at least one second heat exchange tube 32 and the first end surface of the first tube 1 is smaller than the distance between the first side of the second heat exchange tube 32 and the first side of the first spacer 5; at least one other second heat exchange tube 32 is connected to the second section 12 of the first tube 1, and the distance between the second side surface of the at least one other second heat exchange tube 32 and the second end surface of the first tube is smaller than the distance between the second side surface of the second heat exchange tube and the second side surface of the first spacer.

As shown in fig. 7, a portion of the plurality of second heat exchange tubes 32 is disposed at a left portion of the first tube 1 with a space therebetween, i.e., the portion of the second heat exchange tubes 32 is disposed at the refrigerant inlet side of the first tube 1, and at least one second heat exchange tube 32 is present among the portion of the second heat exchange tubes 32, and a distance between a left side surface of the second heat exchange tube 32 and a left end surface of the first tube 1 is smaller than a distance between a left side surface of the second heat exchange tube 32 and a left side surface of the first spacer 5. Another portion of the plurality of second heat exchange tubes 32 is disposed at a right portion of the first tube 1 with a space therebetween, i.e., the another portion of the second heat exchange tubes 32 is disposed at a refrigerant outlet side of the first tube 1, and at least another one of the another portion of the second heat exchange tubes 32 is present in the another portion of the second heat exchange tubes 32, and a distance between a right side surface of the second heat exchange tube 32 and a right end surface of the first tube 1 is smaller than a distance between the right side surface of the second heat exchange tube 32 and a right side surface of the second spacer 5.

The second heat exchange tubes 32 are thus installed on both sides of the heat exchanger so that no internal erosion occurs due to the high temperature in this region. And when the second heat exchange tubes 32 are installed on both sides of the heat exchanger, the number of the second heat exchange tubes 32 can be adjusted according to the welding process, thereby solving the problem of internal erosion caused by the higher temperature in the area.

When the heat exchanger is used as a condenser, the sum of the cross-sectional areas of the channels of each of the second heat exchange tubes 32 in the above-mentioned part of the second heat exchange tubes 32 is larger than the sum of the cross-sectional areas of the channels of the first heat exchange tubes 31. The refrigerant at the refrigerant outlet side is condensed into a gaseous state, and the circulation resistance is relatively large, so that the sum of the cross sectional areas of the channels of the second heat exchange tubes 32 arranged at the refrigerant inlet side of the first tube 1 is relatively large, the overall circulation resistance of the heat exchanger is reduced, and the heat exchange efficiency is improved. Further, the width of each of the portion of the second heat exchange tubes 32 may be greater than the width of the first heat exchange tube 31, and the thickness of each of the portion of the second heat exchange tubes 32 may also be greater than the thickness of the first heat exchange tube 31.

The sum of the cross sectional areas of the channels of each of the other portions of the second heat exchange tubes 32 is smaller than the sum of the cross sectional areas of the channels of the first heat exchange tubes 31. The refrigerant on the refrigerant outlet side is condensed into a liquid phase, and the flow resistance is relatively small, so that the sum of the cross-sectional areas of the channels of the second heat exchange tubes 32 provided on the refrigerant outlet side of the first tubes 1 is relatively small. Wherein, the channel of the second heat exchange tube 32 can be provided with a turbulent flow structure, which improves the heat exchange efficiency. Further, each of the other portions of the second heat exchange tubes 32 may have a width smaller than that of the first heat exchange tube 31, and each of the other portions of the second heat exchange tubes 32 may have a thickness smaller than that of the first heat exchange tube 31. Therefore, the product cost can be reduced while the system performance is ensured.

When the heat exchanger is used as an evaporator, the sum of the cross-sectional areas of the channels of each of the second heat exchange tubes 32 in the above-mentioned part of the second heat exchange tubes 32 is smaller than the sum of the cross-sectional areas of the channels of the first heat exchange tubes 31. The refrigerant is condensed into a liquid phase at the refrigerant outlet side, and the flow resistance is relatively small, so that the sum of the cross-sectional areas of the channels of the second heat exchange tubes 32 provided at the refrigerant inlet side of the first tube 1 is relatively small. Wherein, the channel of the second heat exchange tube 32 can be provided with a turbulent flow structure, which improves the heat exchange efficiency. Further, the width of each of the portion of the second heat exchange tubes 32 may be smaller than the width of the first heat exchange tube 31, and the thickness of each of the portion of the second heat exchange tubes 32 may be smaller than the thickness of the first heat exchange tube 31. Therefore, the product cost can be reduced while the system performance is ensured.

The sum of the cross sectional areas of the channels of each of the other portions of the second heat exchange tubes 32 is larger than the sum of the cross sectional areas of the channels of the first heat exchange tubes 31. The refrigerant at the refrigerant outlet side is condensed into a gaseous state, and the circulation resistance is large, so that the sum of the cross sectional areas of the channels of the second heat exchange tubes 32 arranged at the refrigerant outlet side of the first tube 1 is relatively large, the whole circulation resistance of the heat exchanger is reduced, and the heat exchange efficiency is improved. Further, the width of each of the portion of the second heat exchange tubes 32 may be greater than the width of the first heat exchange tube 31, and the thickness of the width of each of the portion of the second heat exchange tubes 32 may also be greater than the thickness of the first heat exchange tube 31.

Further, the openings are not limited to being provided only on the first pipe 1, for example, in some embodiments, the second pipes 2 each include a first section 11 and a second section 12, and the first section 11 of the second pipe 2 and the first section 11 of the first pipe 1 are arranged at intervals in the length direction of the first pipe 1. In other words, the first section 11 of the second tube 2 and the first section 11 of the first tube 1 are connected to different heat exchange tubes 3, for example, the first section 11 of the second tube 2 is connected to a part of the heat exchange tubes and the first section 11 of the first tube 1 is connected to another part of the heat exchange tubes.

The first and

second sections

11, 12 of the second tube 2 are spaced apart in the length direction of the second tube 1 by a second spacer (not shown). In other words, the second tube 2 is provided with a second spacer between the first segment 11 and the second segment 12 of the first tube 1 such that the first segment 11 and the second segment 12 of the second tube 2 do not directly communicate in the longitudinal direction of the second tube 2. Wherein the first spacer 5 comprises a first side and a second side arranged opposite each other in the length direction of the first tube 1. The second tube 1 comprises a first end face and a second end face and the first section 11 of the second tube 2 comprises the first end face of the second tube 2. The first section 11 of the second tube 2 comprises an opening. In other words, the first tube 1 and the second tube 2 are separated by the spacer, and the heat exchanger includes an odd number of flow paths.

For example, the first section 11 and the second section 12 of the first pipe 1 are connected in turn from left to right, and the first section 11 and the second section 12 of the second pipe 2 are arranged in turn from right to left. The first pipe 1 and the second pipe 2 are spaced apart in the up-down direction, and the first section 11 of the first pipe 1 and the first section 11 of the second pipe 2 are spaced apart in the left-right direction. The first tube 1 includes an opening and is a refrigerant inlet, and the opening 101 is disposed at the first section 11 of the first tube 1. The second tube 2 comprises a further opening 101 in the first section 11 of the second tube 2 and is a refrigerant outlet.

In some specific embodiments, the second heat exchange tube 32 is plural, at least one second heat exchange tube 32 is connected to the first section 11 of the first tube 1, and a distance between a first side of the at least one second heat exchange tube 32 and the first end surface of the first tube 1 is smaller than a distance between the first side of the second heat exchange tube 32 and the first side of the first spacer 5. At least one other second heat exchange tube 32 is connected to the first section 11 of the second tube 2, and the distance between the second side of the at least one other second heat exchange tube 32 and the second end face of the second tube 2 is smaller than the distance between the second side of the second heat exchange tube 32 and the second side of the second spacer.

For example, the first section 11 and the second section of the first tube 1 are sequentially connected from left to right, the first section 11 and the second section of the second tube 2 are sequentially arranged from right to left, at least one second heat exchange tube 32 is connected to the first section 11 of the first tube 1, and the distance between the left side surface of the second heat exchange tube 32 and the left end surface of the first tube 1 is smaller than the distance between the left side surface of the second heat exchange tube 32 and the left side surface of the first spacer 5. At least one other second heat exchange tube 32 is connected to the first section 11 of the second tube 2, and the distance between the right side surface of the second heat exchange tube 32 and the right end surface of the second tube 2 is smaller than the distance between the right side surface of the second heat exchange tube 32 and the right side surface of the second spacer.

Further, the sum of the cross-sectional areas of the channels of at least one of the second heat exchange tubes 32 is greater than or less than the sum of the cross-sectional areas of the channels of at least one other of the second heat exchange tubes 32.

In some embodiments, the heat exchanger further comprises fins 4, the fins 4 being provided between adjacent heat exchange tubes 3 in the length direction of the first tube 1. The arrangement of the fins 4 can improve the heat exchange area of the two adjacent heat exchange tubes 1, and the heat exchange efficiency of the heat exchanger is improved. In addition, by providing the first heat exchange tube 31 having at least a part of the tube body formed by folding a plate and the second heat exchange tube 32 having a tube body formed by one-step forming between the first tube 1 and the second tube 2, it is also possible to improve the welding quality of the first heat exchange tube 31 and the fin 4 by reducing the fitting clearance caused by the height reduction of the first heat exchange tube 31 having a plate folded shape.

Specifically, the second heat exchange tubes 32 adjacent in the length direction of the first tubes 1 are spaced apart by fins and the first heat exchange tubes 31, and/or the second heat exchange tubes 32 adjacent in the length direction of the first tubes 1 are spaced apart by fins only.

In some embodiments, the heat exchange tube 3 comprises first and second sides arranged in opposite and parallel and third and fourth sides arranged in opposite and parallel, the distance between the first and second sides of the heat exchange tube 3 being smaller than the distance between the third and fourth sides of the heat exchange tube, the heat exchange tube 3 comprising at least one channel, the channel communicating the first tube 1 and the second tube. In other words, the heat exchange tube 3 has a width and a thickness, and the heat exchange tube 3 includes a first side and a second side which are arranged oppositely and in parallel in a thickness direction thereof, wherein a distance between the first side and the second side is the thickness of the heat exchange tube 3. The heat exchange tube 3 further comprises a third side and a fourth side which are arranged in parallel and are opposed in the width direction thereof, wherein the distance between the third side and the fourth side is the width of the heat exchange tube 3. In other words, the heat exchange tubes 3 are what is known in the art as flat tubes.

As shown in fig. 5 to 7, the first heat exchange tube 31 and the second heat exchange tube 32 each have a width and a thickness, and each heat exchange tube 3 has a width greater than a thickness. The thickness direction of the first heat exchange tube 31 is the same as the thickness direction of the second heat exchange tube 32 and is the left-right direction, and the width direction of the first heat exchange tube 31 is the same as the width direction of the second heat exchange tube 32 and is the direction perpendicular to the left-right direction and the up-down direction.

In some embodiments, the second heat exchange tube 32 comprises a first section, an intermediate section, and a second section, the first section of the second heat exchange tube 32 being inserted into the first tube 1, and the second section of the second heat exchange tube 32 being inserted into the second tube 2. In other words, the second heat exchange tube 32 has an intermediate section between the first tube 1 and the second tube 2, and a second section inserted into the first tube 1 and the second tube 2. Specifically, the pipe sleeve is sleeved outside the middle section of the second heat exchange pipe 32.

In some embodiments, the heat exchanger further includes a solid plate (not shown), one end of which is inserted into the first section 11 of the first tube 1 to be connected to the first section 11 of the first tube 1, the other end of which is inserted into the second tube 2 to be connected to the second tube 2, the solid plate being arranged at a distance from the first heat exchange tube 31 in the length direction of the first tube 1, the solid plate being arranged at a distance from the second heat exchange tube 32 in the length direction of the first tube 1, the solid plate including first and second sides arranged opposite to each other in the length direction of the first tube 1, the distance between the first side of the solid plate and the first end face of the first tube 1 being smaller than the distance between the first side of the solid plate and the first side of the first spacer 5. As shown in fig. 5 to 7, the length direction of the solid plate coincides with the length direction of the heat exchange tubes 3 and is the up-down direction, the lower end of the solid plate is inserted into the first tube 1 to be connected with the first tube 1, and the upper end of the solid plate is inserted into the second tube 2 to be connected with the second tube 2. The solid plates are arranged in parallel and spaced from the first heat exchange pipe 31 in the left-right direction, and in parallel and spaced from the second heat exchange pipe 32 in the left-right direction. Further, a solid plate is connected to the right portion of the first pipe 1, and the distance between the right side surface of the solid plate and the right end surface of the first pipe 1 is smaller than the distance between the right side surface of the solid plate and the right side surface of the first spacer 5, as shown in fig. 6; or at least one solid plate is arranged at the left side part of the first pipe 1, at least another solid plate is connected with the right side part of the first pipe 1, as shown in fig. 7, the distance between the left side surface of the at least one solid plate and the left end surface of the first pipe 1 is smaller than the distance between the left side surface of the solid plate and the left side surface of the first spacer 5, and the distance between the right side surface of the at least another solid plate and the right end surface of the first pipe 1 is smaller than the distance between the right side surface of the solid plate and the right side surface of the first spacer 5.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A heat exchanger, comprising:

the first pipe and the second pipe are arranged at intervals;

a plurality of heat exchange tubes arranged at intervals in a length direction of the first tube, one end portions of the heat exchange tubes being inserted into the first tube to be connected to the first tube, the other end portions of the heat exchange tubes being inserted into the second tube to be connected to the second tube, the heat exchange tubes including channels communicating the first tube and the second tube,

a plurality of the heat exchange tubes include a plurality of first heat exchange tubes and at least one second heat exchange tube, at least part of the tube body of the first heat exchange tube is formed by folding and forming a plate, the tube body of the second heat exchange tube is formed by one-step forming and processing, the quantity of the second heat exchange tubes is smaller than that of the first heat exchange tubes, the second heat exchange tubes and the first heat exchange tubes are arranged at intervals in the length direction of the first tubes, the first tubes comprise at least two end faces in the length direction of the first tubes, the second heat exchange tubes comprise a first side face and a second side face which are oppositely arranged in the length direction of the first tubes, and the distance between the first side face of the second heat exchange tube and one end face of the first tube is smaller than the distance between the first side face of the second heat exchange tube and the other end face of the first tube.

2. A heat exchanger according to claim 1 wherein the ratio of the distance from the first side of the second heat exchange tube to the one end face of the first tube to the length of the first tube is less than or equal to 1: 5.

3. The heat exchanger according to claim 1 or 2, wherein the at least two end faces of the first tube comprise a first end face and a second end face, the number of the second heat exchange tubes is at least two, wherein the distance between the first side face of one second heat exchange tube and the first end face of the first tube is smaller than the distance between the first side face of the one second heat exchange tube and the second end face of the first tube, and the one second heat exchange tube is located at one outermost side of the plurality of heat exchange tubes in the length direction of the first tube; the distance between the first side surface of the other second heat exchange tube and the second end surface of the first tube is smaller than the distance between the first side surface of the other second heat exchange tube and the first end surface of the first tube, and the other second heat exchange tube is positioned at the other outermost side of the heat exchange tubes in the length direction of the first tube.

4. The heat exchanger as recited in claim 1 or 2, further comprising a solid plate having one end connected to the first tube and the other end connected to the second tube, the solid plate being arranged at a distance from the first heat exchange tube in the longitudinal direction of the first tube, the solid plate being arranged at a distance from the second heat exchange tube in the longitudinal direction of the first tube, the solid plate including first and second side surfaces arranged oppositely in the longitudinal direction of the first tube, the distance between the first side surface of the solid plate and one end surface of the first tube being smaller than the distance between the first side surface of the solid plate and the other end surface of the first tube.

5. A heat exchanger, comprising:

the first pipe and the second pipe are arranged at intervals;

a plurality of heat exchange tubes arranged at intervals in a length direction of the first tube, one end portions of the heat exchange tubes being inserted into the first tube to be connected to the first tube, the other end portions of the heat exchange tubes being inserted into the second tube to be connected to the second tube, the heat exchange tubes including channels communicating the first tube and the second tube, the plurality of heat exchange tubes including a plurality of first heat exchange tubes and at least one second heat exchange tube, at least a part of tube bodies of the first heat exchange tubes being formed by folding a sheet material, tube bodies of the second heat exchange tubes being formed by one-time forming, the number of the second heat exchange tubes being smaller than that of the first heat exchange tubes, the second heat exchange tubes being arranged at intervals with the first heat exchange tubes in the length direction of the first tubes;

the first tube including a first section and a second section, the first and second sections of the first tube being spaced apart by a first spacer in a length direction of the first tube, the first spacer includes first and second sides oppositely disposed in a lengthwise direction of the first tube, the first tube comprising a first end face and a second end face, the first section of the first tube comprising the first end face of the first tube, the first section of the first tube including an opening, at least one of the second heat exchange tubes being connected to the first section of the first tube, the second heat exchange tube comprises a first side surface and a second side surface which are oppositely arranged in the length direction of the first tube, and the distance between the first side surface of at least one second heat exchange tube and the first end surface of the first tube is smaller than the distance between the first side surface of the second heat exchange tube and the first side surface of the first spacer.

6. The heat exchanger of claim 5, wherein the ratio of the distance from the first side of the second heat exchange tube to the first end face of the first tube to the length of the first tube is less than or equal to 1: 2.

7. The heat exchanger according to claim 5 or 6, wherein the channels of the heat exchange tubes have cross-sections, and the sum of the cross-sectional areas of the channels of the first heat exchange tube is greater than or less than the sum of the cross-sectional areas of the channels of the second heat exchange tube.

8. The heat exchanger of claim 6, wherein the second section of the first tube comprises a second end face of the first tube, the second section of the first tube comprising an opening,

the second heat exchange tubes are multiple, at least one second heat exchange tube is connected with the first section of the first tube, the distance between the first side face of the at least one second heat exchange tube and the first end face of the first tube is smaller than the distance between the first side face of the second heat exchange tube and the first side face of the first spacer, at least one other second heat exchange tube is connected with the second section of the first tube, and the distance between the second side face of the at least one other second heat exchange tube and the second end face of the first tube is smaller than the distance between the second side face of the second heat exchange tube and the second side face of the first spacer.

9. The heat exchanger of claim 6, wherein the second tube comprises a first section and a second section, the first section of the second tube being spaced apart from the first section of the first tube in a lengthwise direction of the first tube, the first section and the second section of the second tube being spaced apart in the lengthwise direction of the second tube by a second spacer, the second spacer comprising a first side and a second side oppositely disposed in the lengthwise direction of the first tube, the second tube comprising a first end face and a second end face, the first section of the second tube comprising the first end face of the second tube, the first section of the second tube comprising the opening,

the second heat exchange tubes are multiple, at least one second heat exchange tube is connected with the first section of the first tube, the distance between the first side face of the at least one second heat exchange tube and the first end face of the first tube is smaller than the distance between the first side face of the second heat exchange tube and the first side face of the first spacing piece, at least one other second heat exchange tube is connected with the first section of the second tube, and the distance between the second side face of the at least one other second heat exchange tube and the second end face of the second tube is smaller than the distance between the second side face of the second heat exchange tube and the second side face of the second spacing piece.

10. A heat exchanger according to claim 8 or 9 wherein the channels of the second heat exchange tubes have cross-sections, the sum of the cross-sectional areas of the channels of at least one of the second heat exchange tubes being greater than or less than the sum of the cross-sectional areas of the channels of at least one other of the second heat exchange tubes.

11. The heat exchanger as recited in claim 5 further comprising a solid plate having one end connected to the first section of the first tube and the other end connected to the second tube, the solid plate being spaced from the first heat exchange tube in the direction of the length of the first tube, the solid plate being spaced from the second heat exchange tube in the direction of the length of the first tube, the solid plate including first and second sides oppositely disposed in the direction of the length of the first tube, the distance between the first side of the solid plate and the first end face of the first tube being less than the distance between the first side of the solid plate and the first side of the first spacer.

12. The heat exchanger according to claim 1 or 5, wherein the heat exchange tube comprises first and second sides arranged in opposite and parallel and third and fourth sides arranged in opposite and parallel, a distance between the first and second sides of the heat exchange tube is smaller than a distance between the third and fourth sides of the heat exchange tube, and the second heat exchange tube has a thickness greater than that of the first heat exchange tube.