Heat exchanger and air conditioner

Abstract

The embodiment of the invention provides a heat exchanger and an air conditioner, and relates to the technical field of air conditioners. The air conditioner comprises a heat exchanger, and the heat exchanger comprises a heat exchange body, a plurality of first heat exchange pipes, a first refrigerant pipe and a second refrigerant pipe. The multiple first heat exchange pipes are located in the heat exchange body and arranged at intervals in the length direction of the heat exchange body, each first heat exchange pipe comprises a first branch pipe, a second branch pipe, a third branch pipe and a three-way piece, and the first branch pipe, the second branch pipe and the third branch pipe are connected with three openings of the three-way piece correspondingly. The ends, away from the three-way piece, of the third branch pipes are connected with the second refrigerant pipe. Through the arrangement of the three-way piece, the density of the heat exchange pipes can be increased to reduce the flow length of a refrigerant in the first heat exchange pipe. Therefore, the refrigerant is prevented from being overheated in advance to reduce heat exchange temperature difference and cause pressure loss when flowing in the first heat exchange tube, and the heat exchange efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a heat exchanger and an air conditioner. Background Art

[0002] Air conditioners use different refrigerants, and should choose heat exchangers with matching tube diameters to improve heat exchange efficiency. For example, R22 refrigerant has a large pressure loss, and is usually used in φ7 and φ9 tube heat exchangers. For R32 and R410A refrigerants, the pressure loss is small, and matching with φ7 and φ5 tube heat exchangers can improve heat exchange efficiency.

[0003] The inventors have found that if an evaporator with a φ5 tube is used in a large-capacity air-cooled cabinet, the evaporation process in the heat exchange tube may be too long during cooling, causing the refrigerant to overheat prematurely, thereby reducing the heat exchange efficiency. Summary of the invention

[0004] An object of the present invention is to provide a heat exchanger and an air conditioner, which can improve the heat exchange efficiency of the heat exchanger.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In a first aspect, the present invention provides a heat exchanger, comprising:

[0007] Heat exchange body;

[0008] A plurality of first heat exchange tubes, the plurality of first heat exchange tubes are located in the heat exchange body and are arranged at intervals along the length direction of the heat exchange body, each first heat exchange tube comprises a first branch tube, a second branch tube, a third branch tube and a tee, the first branch tube, the second branch tube and the third branch tube are respectively connected to the three openings of the tee;

[0009] A first refrigerant pipe, and ends of the plurality of first branch pipes away from the tee are all connected to the first refrigerant pipe;

[0010] A second refrigerant pipe, one end of each of the plurality of second branch pipes away from the tee is connected to the second refrigerant pipe, and one end of each of the plurality of third branch pipes away from the tee is connected to the second refrigerant pipe;

[0011] The first branch pipe, the second branch pipe and the third branch pipe are φ5 pipes.

[0012] Through the above arrangement, the density of the heat exchange tube can be increased to reduce the flow length of the refrigerant in the first heat exchange tube, thereby avoiding premature overheating of the refrigerant when flowing in the first heat exchange tube to cause pressure loss, thereby ensuring heat exchange efficiency.

[0013] In an optional embodiment, the first refrigerant pipe and the second refrigerant pipe are located on the same side of the heat exchange body.

[0014] Through the above arrangement, when plugging the first refrigerant pipe 30 and the second refrigerant pipe, it only needs to be completed on one side of the heat exchange body, which can make the heat exchanger more convenient to install.

[0015] In an optional embodiment, the second branch pipe and the third branch pipe are arranged at intervals along the length direction.

[0016] The above arrangement can avoid interference between the second branch pipe and the third branch pipe in the heat exchange body, and the heat exchange effect of the heat exchanger in the length direction can be ensured by the arrangement of the second branch pipe and the third branch pipe.

[0017] In an optional embodiment, the heat exchanger also includes a second heat exchange tube and a temperature sensing package arranged in the heat exchange body, the two ends of the second heat exchange tube are respectively connected to the first refrigerant tube and the second refrigerant tube, and the temperature sensing package is arranged on the second heat exchange tube.

[0018] Since the first heat exchange tube is provided with a tee, the thickness of the tube at the connection between the first heat exchange tube and the tee is relatively thin, so the temperature sensing package provided on the first heat exchange tube is likely to cause the first heat exchange tube to rupture due to the thin thickness of the tube. Through the above arrangement, the second heat exchange tube can be prevented from rupturing due to the thin thickness of the tube, and the normal operation of the temperature sensing package is ensured.

[0019] In an optional embodiment, the second heat exchange tube is spaced apart from the plurality of first heat exchange tubes along the length direction, and the second heat exchange tube is located on one side of the plurality of first heat exchange tubes.

[0020] Through the above settings, the temperature sensing package can detect the extreme temperature of the heat exchanger.

[0021] In an optional embodiment, the plurality of first heat exchange tubes are divided into two groups, the first refrigerant tubes are liquid refrigerant tubes, and the first refrigerant tubes include two first refrigerant branch tubes and a first refrigerant main tube connected to the two first refrigerant branch tubes;

[0022] One end of the two first refrigerant branch pipes away from the first refrigerant main pipe is respectively connected to a plurality of first branch pipes in the two groups.

[0023] Through the above arrangement, the length of the capillary tube connected to the first branch tube in each group of first heat exchange tubes can be better distributed, so that the flow length of the refrigerant is more uniform, thereby improving the heat exchange uniformity of the heat exchanger.

[0024] In an optional embodiment, the tee is disposed on a side of the heat exchange body close to the first refrigerant pipe, and the tee includes a first pipeline, a second pipeline, and a third pipeline that are interconnected;

[0025] The first branch pipe, the second branch pipe and the third branch pipe are all U-shaped pipes. The two ends of the first branch pipe are respectively connected to the first refrigerant pipe and the first pipeline, the two ends of the second branch pipe are respectively connected to the second pipeline and the second refrigerant pipe, and the two ends of the third branch pipe are respectively connected to the third pipeline and the second refrigerant pipe.

[0026] Through the above arrangement, when the refrigerant flows from the first refrigerant tube in the first heat exchange tube to the second refrigerant tube, it will reciprocate twice in the heat exchange body, that is, the flow of the refrigerant is about 4m. This can avoid premature overheating of the refrigerant when it flows in the first heat exchange tube, thereby ensuring the heat exchange effect.

[0027] In an optional embodiment, the heat exchange body has a first end and a second end opposite to each other in the length direction of the heat exchange body, and an end of the first branch pipe close to the first refrigerant pipe is opposite to the first end of the first pipeline close to the first end.

[0028] Through the above arrangement, the liquid refrigerant can flow from the first refrigerant pipe into the first branch pipe, and when the first branch pipe flows to the first pipeline, the flow resistance of the liquid refrigerant from top to bottom is relatively small.

[0029] In an optional embodiment, one end of the second branch pipe close to the second refrigerant pipe is closer to the first end than one end of the second pipeline close to the second branch pipe; one end of the third branch pipe close to the second refrigerant pipe is closer to the first end than one end of the third pipeline close to the third branch pipe.

[0030] Through the above arrangement, when the proportion of gaseous refrigerant further increases, the gaseous refrigerant has a flow trend from bottom to top when flowing in the second branch or the third branch, so that the resistance to the flow of the gaseous refrigerant will be smaller, thereby increasing the heat exchange efficiency of the heat exchanger.

[0031] In a second aspect, the present invention provides an air conditioner, comprising a heat exchange device, a pipeline, and the heat exchanger of any one of the aforementioned embodiments, wherein the heat exchange device is connected to the first refrigerant pipe or the second refrigerant pipe through the pipeline.

[0032] The beneficial effect of the embodiment of the present invention is as follows: the embodiment of the present invention provides a heat exchanger and an air conditioner, the air conditioner includes a heat exchanger, the heat exchanger includes a heat exchange body, a plurality of first heat exchange tubes, a first refrigerant tube and a second refrigerant tube. The plurality of first heat exchange tubes are located in the heat exchange body and are arranged at intervals along the length direction of the heat exchange body, each first heat exchange tube includes a first branch tube, a second branch tube, a third branch tube and a tee, and the first branch tube, the second branch tube and the third branch tube are respectively connected to the three openings of the tee. The ends of the plurality of first branches away from the tee are all connected to the first refrigerant tube, the ends of the plurality of second branches away from the tee are all connected to the second refrigerant tube, and the ends of the plurality of third branches away from the tee are all connected to the second refrigerant tube. The first branch tube, the second branch tube and the third branch tube are all φ5 tubes. By setting the tee, the density of the heat exchange tube can be increased to reduce the flow length of the refrigerant in the first heat exchange tube. Thereby avoiding premature overheating of the refrigerant when flowing in the first heat exchange tube, reducing the heat exchange temperature difference and causing pressure loss, thereby ensuring the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the connection between the first heat exchange tube, the second heat exchange tube, the first refrigerant tube and the second refrigerant tube in the heat exchanger provided in an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A partial enlarged view of

[0036] Figure 3 A schematic structural diagram of a heat exchanger provided by an embodiment of the present invention at a first viewing angle;

[0037] Figure 4 A schematic structural diagram of a heat exchanger provided in an embodiment of the present invention at a second viewing angle.

[0038] Icons: 1-heat exchanger; 10-heat exchange body; 11-first end; 12-second end; 13-first surface; 14-second surface; 20-first heat exchange tube; 21-first branch pipe; 22-second branch pipe; 23-third branch pipe; 24-tee; 241-first pipeline; 242-second pipeline; 243-third pipeline; 30-first refrigerant pipe; 31-first refrigerant branch pipe; 32-first refrigerant main pipe; 40-second refrigerant pipe; 50-temperature sensing package; 60-second heat exchange tube. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the heat exchanger, the greater the flow resistance loss of the refrigerant, the lower the heat exchange efficiency of the heat exchanger. The pressure drop characteristics of different refrigerants flowing in the heat exchange tubes vary greatly. The resistance loss caused by the flow of the refrigerant increases with the increase of dryness. This is because the greater the dryness, the greater the specific volume of the refrigerant, the faster the flow rate, and the greater the resistance loss. The resistance loss is R22>R290>R410A>R32. The flow resistance loss of R410A is slightly greater than that of R32. For R32 or R410A refrigerants, φ7 or φ5 tubes can be matched.

[0046] The inventor has found that the φ5 heat exchanger has been used in the industry for small cooling capacity models, such as 1P-5P models, and is less used in large cooling capacity models. For example, in the 10P air-cooled cabinet model, the body width is about 900-1100mm, and the height of the heat exchanger is generally designed to be about 950-1000mm. If φ5 tubes are used, the density of the heat exchange tubes in the heat exchanger needs to be increased to increase the heat exchange intensity. In the case of refrigeration, if the evaporator process is too long, the refrigerant may be overheated in advance, resulting in a reduction in the heat exchange temperature difference and pressure loss, which reduces the heat exchange efficiency. For example, most existing heat exchangers use one-in-one-out type heat exchange tubes. When this type of heat exchange tube is in the heat exchange body of a heat exchanger with a large cooling capacity, it is necessary to pass back and forth through the opposite sides of the heat exchange body for many times, that is, to make a certain number of bends in the heat exchange body, so that the heat exchange tube is fully arranged in the heat exchange body in the thickness direction to ensure the heat exchange effect of the heat exchanger. However, it will also increase the width of the heat exchange tube in the heat exchange body, that is, it will increase the flow rate of the refrigerant in the heat exchange body, thereby reducing the heat exchange efficiency.

[0047] In view of the above problems, an embodiment of the present invention provides a heat exchanger 1 , which can effectively ensure the heat exchange efficiency of the heat exchanger 1 .

[0048] The specific structure of a heat exchanger 1 provided by an embodiment of the present invention and the corresponding technical effects thereof are described in detail below in conjunction with the patent drawings.

[0049] Please refer to Figure 1-Figure 4 A heat exchanger 1 provided in an embodiment of the present invention includes a heat exchange body 10 , a plurality of first heat exchange tubes 20 , a first refrigerant tube 30 and a second refrigerant tube 40 .

[0050] The plurality of first heat exchange tubes 20 are located in the heat exchange body 10 and are arranged at intervals along the length direction of the heat exchange body 10. Each first heat exchange tube 20 includes a first branch tube 21, a second branch tube 22, a third branch tube 23 and a tee 24. The first branch tube 21, the second branch tube 22 and the third branch tube 23 are respectively connected to the three openings of the tee 24. The ends of the plurality of first branch tubes 21 away from the tee 24 are connected to the first refrigerant tube 30, the ends of the plurality of second branch tubes 22 away from the tee 24 are connected to the second refrigerant tube 40, and the ends of the plurality of third branch tubes 23 away from the tee 24 are connected to the second refrigerant tube 40. The first branch tube 21, the second branch tube 22 and the third branch tube 23 are all φ5 tubes.

[0051] It should be noted that the φ5 tube refers to a tube with an outer diameter of 5 mm. The length direction mentioned in this embodiment is the extension direction of the heat exchanger 1 installed in the air cooling cabinet. Figure 1 For reference, the length direction refers to the a direction, the width direction refers to the b direction, and the thickness direction refers to the direction perpendicular to both the length direction and the width direction.

[0052] In this embodiment, through the arrangement of the tee piece 24, when the heat exchanger 1 is used as an evaporator, the first refrigerant pipe 30 is a liquid refrigerant pipe, and the second refrigerant pipe 40 is a gaseous refrigerant pipe. The refrigerant can be divided into the second branch pipe 22 and the third branch pipe 23 after passing through the first branch pipe 21. In other words, the first heat exchange pipe 20 in this embodiment is in the form of "one inlet and two outlets", that is, one first heat exchange pipe 20 has a second branch pipe 22 and a third branch pipe 23 connected to the second refrigerant pipe 40, which are two heat exchange branch pipes.

[0053] When the heat exchanger 1 is an evaporator, in this embodiment, the first refrigerant tube 30 is a liquid refrigerant tube, and the second refrigerant tube 40 is a gaseous refrigerant tube, that is, the first branch tube 21 is an inlet tube. Multiple heat exchange tubes will be arranged in sequence in the height direction of the heat exchange body 10. For the "one-in-one-out" type of heat exchange tubes, it is generally necessary to ensure the spacing between adjacent "inlet tubes" connected to the capillary tubes, that is, it is generally necessary to ensure the spacing between the first branch tubes 21. Therefore, the number of "one-in-one-out" heat exchange tubes in the length direction of the heat exchange body 10 is limited. In order to ensure that the heat exchange tubes are fully arranged in the heat exchange body 10 in the thickness direction to ensure the heat exchange effect of the heat exchanger 1, the "one-in-one-out" heat exchange tubes need to pass through the opposite sides of the heat exchange body 10 many times. However, this will increase the flow of the refrigerant in the heat exchange body 10, thereby reducing the heat exchange efficiency.

[0054] In the same space of the heat exchange body 10, the first heat exchange tube 20 of the "one in and two out" form has more tubes connected to the second refrigerant tube 40 than the heat exchange tube of the "one in and one out" form, so the density of the heat exchange tube can be increased to reduce the flow length of the refrigerant in the first heat exchange tube 20. This prevents the refrigerant from being overheated in advance when flowing in the first heat exchange tube 20, thereby reducing the heat exchange temperature difference and causing pressure loss, thereby ensuring the heat exchange efficiency.

[0055] Further, in this embodiment, the first refrigerant tube 30 and the second refrigerant tube 40 are located on the same side of the heat exchange body 10. It should be noted that when the heat exchanger 1 in this embodiment is an evaporator, the first refrigerant tube 30 is a liquid refrigerant tube, and the second refrigerant tube 40 is a gaseous refrigerant tube. In other words, the gaseous refrigerant tube and the liquid refrigerant tube are located on the same side of the heat exchange body 10, so when plugging the first refrigerant tube 30 and the second refrigerant tube 40, it only needs to be completed on one side of the heat exchange body 10, which can make the heat exchanger 1 more convenient to install.

[0056] It is easy to understand that since the first refrigerant tube 30 and the second refrigerant tube 40 are located on the same side of the heat exchange body 10, the first heat exchange tube 20 penetrates into the heat exchange body 10 from the side close to the first refrigerant tube 30 in the heat exchange body 10 and reciprocates between the side of the heat exchange body 10 where the first refrigerant tube 30 is set and the side of the heat exchange body 10 opposite to the first refrigerant tube 30 and the second refrigerant tube 40, and finally passes back from the side of the heat exchange body 10 away from the first refrigerant tube 30 to the side of the heat exchange body 10 close to the first refrigerant tube 30.

[0057] The inventor has found through research that the length of the internal flow path of the evaporator using a φ5 tube is about 4 meters, which is more reasonable. In other words, the length of the first heat exchange tube 20 inside the heat exchanger 1 is 4 meters.

[0058] It is easy to understand that for the heat exchanger 1 with "one-in-one-out" heat exchange tubes, the number of heat exchange tubes arranged in the length direction of the heat exchange body 10 is limited. Therefore, in order to ensure that the heat exchange tubes are fully arranged in the heat exchange body 10 in the thickness direction, the heat exchange effect of the heat exchanger 1 is guaranteed. The heat exchange body 10 has a first surface 13 and a second surface 14 opposite to each other, wherein the distance between the first surface 13 and the second surface 14 is the length of the heat exchange body 10. The "one-in-one-out" heat exchange tube will pass from the first surface 13 to the second surface 14, and then turn around on the second surface 14 and pass to the first surface 13, then pass from the first surface 13 to the second surface 14, then turn around and pass from the second surface 14 to the first surface 13, then turn around and pass from the first surface 13 to the second surface 14, and finally turn around and pass from the second surface 14 to the first surface 13. The "one-in-one-out" type will be reciprocated and passed between the first surface 13 and the second surface 14 for three circles. Since the width of the heat exchanger 1 of the 10P large cooling capacity air-cooled cabinet is about 900-1100mm, the length of the "one-in-one-out" heat exchange tube that goes back and forth between the first surface 13 and the second surface 14 for three turns is about 6m. This is much longer than the reasonable length of 4m when using a φ5 tube. Therefore, the refrigerant may be overheated in advance, resulting in a reduction in the heat exchange temperature difference and a large resistance of excessive gas in the pipeline, resulting in a large pressure loss.

[0059] In this embodiment, one inlet tube corresponds to two outlet tubes, and the density of the heat exchange tubes in the heat exchange body 10 can be increased by using the two outlet tubes. Thus, the number of turns that the refrigerant reciprocates in the heat exchange body 10 through the first heat exchange tube 20 can be reduced. Therefore, for example, in this embodiment, the number of turns that the refrigerant reciprocates in the heat exchange body 10 through the first heat exchange tube 20 is two.

[0060] Specifically, in the present embodiment, the tee 24 is arranged on one side of the heat exchange body 10 close to the first refrigerant pipe 30, and the tee 24 includes a first pipeline 241, a second pipeline 242 and a third pipeline 243 which are interconnected. That is to say, the first branch pipe 21, the second branch pipe 22 and the third branch pipe 23 are all U-shaped pipes, and the two ends of the first branch pipe 21 are respectively connected to the first refrigerant pipe 30 and the first pipeline 241, and the two ends of the second branch pipe 22 are respectively connected to the second pipeline 242 of the tee 24 and the second refrigerant pipe 40. Similarly, the two ends of the third branch pipe 23 are respectively connected to the third pipeline 243 and the second refrigerant pipe 40.

[0061] It is easy to understand that when the refrigerant flows from the first branch pipe 21 to the first pipeline 241, it reciprocates in the heat exchange body 10 for one circle, and is divided from the tee 24, and flows through the second pipeline 242 and the second pipeline 242 through the second branch pipe 22 and the third branch pipe 23 respectively. When the refrigerant flows to the second refrigerant pipe 40 through the second branch pipe 22, it reciprocates in the heat exchange body 10 for one circle, and when the refrigerant flows to the second refrigerant pipe 40 through the third branch pipe 23, it reciprocates in the heat exchange body 10 for one circle, that is, when the refrigerant flows from the first refrigerant pipe 30 in the first heat exchange pipe 20 to the second refrigerant pipe 40, it will reciprocate in the heat exchange body 10 for two circles, that is, the flow of the refrigerant is about 4m. In this way, it can avoid the situation that the refrigerant is overheated in advance when it circulates in the first heat exchange pipe 20. Thereby ensuring the heat exchange effect.

[0062] Furthermore, the second branch pipe 22 and the third branch pipe 23 are arranged at intervals along the length direction of the heat exchange body 10 .

[0063] It is easy to understand that since the second branch pipe 22 and the third branch pipe 23 are arranged at intervals along the length direction of the heat exchange body 10, interference between the second branch pipe 22 and the third branch pipe 23 in the heat exchange body 10 can be avoided. In addition, the heat exchange effect of the heat exchanger 1 in the length direction can be ensured by the arrangement of the second branch pipe 22 and the third branch pipe 23.

[0064] Specifically, in this embodiment, the heat exchange body 10 has an opposite first end 11 and a second end 12 in the length direction of the heat exchange body 10. An end of the first branch pipe 21 close to the first refrigerant pipe 30 is closer to the first end 11 than the first pipeline 241.

[0065] It should be noted that when the heat exchanger 1 is installed in an air-cooled cabinet as an evaporator, the second end 12 is installed at the bottom on the installation base plate of the air-cooled cabinet.

[0066] That is, when the heat exchanger 1 is installed in the air-cooled cabinet as an evaporator, the height of the end of the first branch pipe 21 close to the first refrigerant pipe 30 is higher than the first pipeline 241. Therefore, when the liquid refrigerant flows from the first refrigerant pipe 30 into the first branch pipe 21 and flows from the first branch pipe 21 to the first pipeline 241, the flow resistance of the liquid refrigerant from top to bottom is small.

[0067] It should be noted that when the heat exchanger 1 provided in this embodiment is an evaporator, and the first refrigerant pipe 30 is a liquid refrigerant pipe, and the second refrigerant pipe 40 is a gaseous refrigerant pipe, when the refrigerant flows in the first heat exchange pipe 20 with a diameter of φ5, the flow rate is about 2m after passing through the first branch pipe 21, and the proportion of gaseous refrigerant in the refrigerant increases, and the resistance also begins to increase. After passing through the tee 24, it is divided into two paths by the second pipeline 242 and the third pipeline 243, which can reduce the refrigerant flow resistance. The refrigerant in the second pipeline 242 and the third pipeline 243 of the tee 24 flows to the second branch pipe 22 and the third branch pipe 23 respectively, and the proportion of gaseous refrigerant flowing in the second branch pipe 22 and the third branch pipe 23 is further increased, and the flow resistance of the refrigerant is also further increased.

[0068] Furthermore, one end of the second branch pipe 22 close to the second refrigerant pipe 40 is closer to the first end 11 than one end of the second pipe 242 close to the second branch pipe 22, and one end of the third branch pipe 23 close to the second refrigerant pipe 40 is closer to the first end 11 than one end of the third pipe 243 close to the third branch pipe 23. That is, when the heat exchanger 1 is installed in the air-cooled cabinet as an evaporator, the height of one end of the second branch pipe 22 close to the second refrigerant pipe 40 is higher than one end of the second pipe 242 close to the second branch pipe 22, and the height of one end of the third branch pipe 23 close to the second refrigerant pipe 40 is higher than one end of the third pipe 243 close to the third pipe 243.

[0069] Therefore, when the proportion of gaseous refrigerant further increases, the gaseous refrigerant has a flow trend from bottom to top when flowing in the second branch pipe 22 or the third branch pipe 23, so that the resistance to the flow of the gaseous refrigerant will be smaller, thereby increasing the heat exchange efficiency of the heat exchanger 1.

[0070] The heat exchanger 1 further includes a second heat exchange tube 60 and a temperature-sensing package 50 disposed in the heat exchange body 10. The two ends of the second heat exchange tube 60 are respectively connected to the first refrigerant tube 30 and the second refrigerant tube 40, and the temperature-sensing package 50 is disposed on the second heat exchange tube 60. In other words, the second heat exchange tube 60 is a "one-in-one-out" type heat exchange tube, and the temperature-sensing package 50 is disposed on the second heat exchange tube 60. Since the first heat exchange tube 20 is provided with a tee piece 24, the thickness of the tube at the connection between the first heat exchange tube 20 and the tee piece 24 is relatively thin. Therefore, the temperature-sensing package 50 is disposed on the first heat exchange tube 20, which easily causes the first heat exchange tube 20 to rupture due to the thin tube thickness.

[0071] It should be noted that Figure 3-Figure 4 For reference, the refrigerant can reciprocate three times in the heat exchange body 10 through the "one-in-one-out" second heat exchange tube 60. That is, in some embodiments, the heat exchange body 10 only has the "one-in-one-out" second heat exchange tube 60 similar to the present embodiment.

[0072] In the present embodiment, a temperature sensing package 50 is disposed on the second heat exchange tube 60 , which can prevent the second heat exchange tube 60 from being broken due to the thin thickness of the tube, thereby ensuring the normal operation of the temperature sensing package 50 .

[0073] Of course, in some optional embodiments, the temperature sensing package 50 can also be arranged at the place where the first heat exchange tube 20 is not connected to the tee piece 24, so as to avoid the first heat exchange tube 20 from being broken due to the thin tube thickness.

[0074] Furthermore, the second heat exchange tube 60 is arranged at intervals with the plurality of first heat exchange tubes 20 along the length direction, and the second heat exchange tube 60 is located on one side of the plurality of first heat exchange tubes 20. Specifically, the second heat exchange tube 60 is located on one side of the plurality of first heat exchange tubes 20 close to the second end 12 of the heat exchange body 10. In other words, the temperature sensing package 50 is arranged on one side of the heat exchange body 10 close to the second end 12. It should be noted that when cooling, the temperature close to the second end 12 of the heat exchange body 10 is the lowest, and when heating, the temperature close to the second end 12 of the heat exchange body 10 is the highest. Therefore, through the above arrangement, the temperature sensing package 50 can detect the limit temperature of the heat exchanger 1.

[0075] Furthermore, the multiple first heat exchange tubes 20 are divided into two groups, the first refrigerant tube 30 is a liquid refrigerant tube, the first refrigerant tube 30 includes two first refrigerant branch pipes 31 and a first refrigerant main pipe 32 connected to the two refrigerant branch pipes, and one end of the two first refrigerant straight pipes away from the first refrigerant main pipe 32 is respectively connected to the multiple first branch pipes 21 in the two groups.

[0076] It should be noted that the first refrigerant pipe 30 also includes two groups of capillary tubes respectively connected to the two first refrigerant branch pipes 31. The two ends of the capillary tube are respectively connected to the first refrigerant branch pipe 31 and the first branch pipe 21. In other words, by providing two first refrigerant branch pipes 31, the length of the capillary tube connected to the first branch pipe 21 in each group of the first heat exchange tubes 20 can be better distributed. The flow length of the refrigerant is more uniform, so as to improve the heat exchange uniformity of the heat exchanger 1.

[0077] It should be noted that in this embodiment, the first refrigerant tube 30 and the second refrigerant tube 40 are both located on the first surface 13 of the heat exchange body 10. To avoid interference between the first refrigerant tube 30 and the second refrigerant tube 40, the first refrigerant tube 30 and the second refrigerant tube 40 are located on both sides of the first surface 13 in the thickness direction.

[0078] The embodiment of the present invention further provides an air conditioner, comprising a heat exchange device, a pipeline and the above-mentioned heat exchanger 1, wherein the heat exchange device is connected to the first refrigerant pipe 30 or the second refrigerant pipe 40 through the pipeline. In this embodiment, the air conditioner is an air-cooled cabinet, the heat exchanger 1 is an evaporator, the heat exchange device is a condenser, the first refrigerant pipe 30 is a liquid refrigerant pipe, and the second refrigerant pipe 40 is a gaseous refrigerant pipe. The heat exchange device is connected to the first refrigerant pipe 30 through the pipeline.

[0079] In summary, the embodiment of the present invention provides a heat exchanger 1 and an air conditioner, the air conditioner comprising a heat exchanger 1, the heat exchanger 1 comprising a heat exchange body 10, a plurality of first heat exchange tubes 20, a first refrigerant tube 30 and a second refrigerant tube 40. The plurality of first heat exchange tubes 20 are located in the heat exchange body 10 and are arranged at intervals along the length direction of the heat exchange body 10, each of the first heat exchange tubes 20 comprises a first branch tube 21, a second branch tube 22, a third branch tube 23 and a tee 24, the first branch tube 21, the second branch tube 22 and the third branch tube 23 are respectively connected to the three openings of the tee 24. The ends of the plurality of first branch tubes 21 away from the tee 24 are all connected to the first refrigerant tube 30, the ends of the plurality of second branch tubes 22 away from the tee 24 are all connected to the second refrigerant tube 40, and the ends of the plurality of third branch tubes 23 away from the tee 24 are all connected to the second refrigerant tube 40. The first branch tube 21, the second branch tube 22 and the third branch tube 23 are all φ5 tubes. By setting the tee 24, the density of the heat exchange tube can be increased to reduce the flow length of the refrigerant in the first heat exchange tube 20. This prevents the refrigerant from being overheated in advance when flowing in the first heat exchange tube 20, thereby reducing the heat exchange temperature difference and causing pressure loss, thereby ensuring the heat exchange efficiency.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that: include: Heat exchange body (10); a plurality of first heat exchange tubes (20), the plurality of first heat exchange tubes (20) being located in the heat exchange body (10) and arranged at intervals along the length direction of the heat exchange body (10), each of the first heat exchange tubes (20) comprising a first branch tube (21), a second branch tube (22), a third branch tube (23) and a tee (24), the first branch tube (21), the second branch tube (22) and the third branch tube (23) being respectively connected to three openings of the tee (24); A first refrigerant pipe (30), wherein one end of each of the plurality of first branch pipes (21) away from the tee piece (24) is connected to the first refrigerant pipe (30); A second refrigerant pipe (40), wherein one end of each of the plurality of second branch pipes (22) away from the tee piece (24) is connected to the second refrigerant pipe (40), and one end of each of the plurality of third branch pipes (23) away from the tee piece (24) is connected to the second refrigerant pipe (40); The first branch pipe (21), the second branch pipe (22) and the third branch pipe (23) are φ5 pipes.

2. The heat exchanger according to claim 1, characterized in that: The first refrigerant pipe (30) and the second refrigerant pipe (40) are located on the same side of the heat exchange body (10).

3. The heat exchanger according to claim 1, characterized in that: The second branch pipe (22) and the third branch pipe (23) are arranged at intervals along the length direction.

4. The heat exchanger according to claim 1, characterized in that: The heat exchanger also includes a second heat exchange tube (60) and a temperature sensing package (50) arranged in the heat exchange body (10), the two ends of the second heat exchange tube (60) are respectively connected to the first refrigerant tube (30) and the second refrigerant tube (40), and the temperature sensing package (50) is arranged on the second heat exchange tube (60).

5. The heat exchanger according to claim 4, characterized in that: The second heat exchange tube (60) and the plurality of the first heat exchange tubes (20) are arranged at intervals along the length direction, and the second heat exchange tube (60) is located on one side of the plurality of the first heat exchange tubes (20).

6. The heat exchanger according to claim 1, characterized in that: The plurality of first heat exchange tubes (20) are divided into two groups, the first refrigerant tube (30) is a liquid refrigerant tube, and the first refrigerant tube (30) includes two first refrigerant branch tubes (31) and a first refrigerant main tube (32) connected to the two first refrigerant branch tubes (31); One end of the two first refrigerant branch pipes (31) away from the first refrigerant main pipe (32) is respectively connected to a plurality of the first branch pipes (21) in two groups.

7. The heat exchanger according to claim 1, characterized in that: The three-way piece (24) is arranged on a side of the heat exchange body (10) close to the first refrigerant pipe (30), and the three-way piece (24) includes a first pipeline (241), a second pipeline (242) and a third pipeline (243) which are interconnected; The first branch pipe (21), the second branch pipe (22) and the third branch pipe (23) are all U-shaped pipes. The two ends of the first branch pipe (21) are respectively connected to the first refrigerant pipe (30) and the first pipeline (241), the two ends of the second branch pipe (22) are respectively connected to the second pipeline (242) and the second refrigerant pipe (40), and the two ends of the third branch pipe (23) are respectively connected to the third pipeline (243) and the second refrigerant pipe (40).

8. The heat exchanger according to claim 7, characterized in that: In the length direction of the heat exchange body (10), the heat exchange body (10) has a first end (11) and a second end (12) opposite to each other, and an end of the first branch pipe (21) close to the first refrigerant pipe (30) is relatively close to the first end (11) of the first pipeline (241).

9. The heat exchanger according to claim 8, characterized in that: One end of the second branch pipe (22) close to the second refrigerant pipe (40) is closer to the first end (11) than one end of the second pipeline (242) close to the second branch pipe (22); one end of the third branch pipe (23) close to the second refrigerant pipe (40) is closer to the first end (11) than one end of the third pipeline (243) close to the third branch pipe (23).

10. An air conditioner, characterized in that: It comprises a heat exchange device, a pipeline and the heat exchanger according to any one of claims 1 to 9, wherein the heat exchange device is connected to the first refrigerant pipe (30) or the second refrigerant pipe (40) through the pipeline.

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