Heat exchanger and vehicle

Abstract

The utility model relates to the technical field of air conditioning systems, and provides a heat exchanger and a vehicle. The heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of flat pipes arranged between the first collecting pipe and the second collecting pipe side by side, the flat pipes are communicated with the first collecting pipe and the second collecting pipe respectively, a refrigerant inlet and a refrigerant outlet are formed in the first collecting pipe, a connecting support is arranged on the first collecting pipe, and the connecting support is connected with the flat pipes. An air inlet channel, a liquid outlet channel and a heat insulation structure located between the air inlet channel and the liquid outlet channel are integrated on the connecting support, the air inlet channel communicates with the refrigerant inlet, the liquid outlet channel communicates with the refrigerant outlet, and the heat insulation structure is used for limiting heat transfer between the air inlet channel and the liquid outlet channel. According to the heat exchanger, arrangement of an air conditioner pipeline in a vehicle is facilitated, the phenomenon that the supercooling degree of a refrigerant of the liquid outlet channel is low after heat absorption can be avoided, and therefore the refrigeration efficiency of an air conditioner system can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning system technical field, especially a kind of heat exchanger.It further relates to a vehicle with the heat exchanger. BACKGROUND

[0002] The heat exchanger is an indispensable component in air conditioning system, which exchanges heat between refrigerant and air to realize air cooling or heating in vehicle or room. As an important component of heat exchanger, the condenser cools and condenses high-temperature and high-pressure gaseous refrigerant discharged by air conditioner compressor into liquid refrigerant for subsequent circulation in air conditioning system. In the prior art, the condenser has low subcooling degree and low air conditioning system efficiency under low gear or low load working condition. Moreover, due to the extremely limited space of vehicle front end module, it is difficult to arrange the inlet and outlet pipelines of condenser. SUMMARY

[0003] Therefore, the utility model aims to provide a heat exchanger to facilitate the arrangement of air conditioning pipeline in vehicle and improve the refrigeration efficiency of air conditioning system.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A heat exchanger includes a first header pipe and a second header pipe arranged vertically, and a plurality of flat tubes arranged side by side between the first header pipe and the second header pipe, each of the flat tubes being in communication with the first header pipe and the second header pipe.

[0006] The first header pipe is provided with a refrigerant inlet and a refrigerant outlet, and a connecting bracket is arranged on the first header pipe, and the connecting bracket is integrated with an air inlet channel and a liquid outlet channel, and a heat insulation structure between the air inlet channel and the liquid outlet channel.

[0007] The air inlet channel is in communication with the refrigerant inlet, the liquid outlet channel is in communication with the refrigerant outlet, and the heat insulation structure is used to limit the heat transfer between the air inlet channel and the liquid outlet channel.

[0008] Further, the refrigerant inlet is located above the refrigerant outlet.

[0009] The connecting bracket is arranged close to the refrigerant inlet, and the connecting bracket includes a bracket body connected to the first header pipe, and a connecting block integrally formed on the bracket body.

[0010] The air inlet channel and the liquid outlet channel are arranged on the connecting block.

[0011] Further, the heat insulation structure comprises a heat insulation groove formed on the connecting block; the gas inlet channel and the liquid outlet channel are located on two sides of the heat insulation groove.

[0012] Further, the support body comprises a first support arm and a second support arm, one end of the first support arm and the second support arm are connected together, and the other end of the first support arm and the second support arm are connected with the connecting block; the second support arm is in a bent shape, and the first support arm, the second support arm and the connecting block are connected to form a polygonal structure.

[0013] Further, a plurality of first partition plates are arranged in the first header pipe, and a plurality of second partition plates are arranged in the second header pipe; the plurality of first partition plates and the plurality of second partition plates separate the refrigerant heat exchange paths in the heat exchanger into a supercooling zone and a plurality of non-supercooling zones above the supercooling zone; along the flow direction of the refrigerant, the number of the flat tubes in the plurality of non-supercooling zones gradually decreases.

[0014] Further, the ratio i of the number of the flat tubes in the supercooling zone to the total number of the flat tubes in the heat exchanger satisfies: 14%≤i≤16%.

[0015] Further, a liquid storage and drying cylinder in communication with the second header pipe is further included; the inlet and the outlet of the liquid storage and drying cylinder are arranged close to the bottom end of the second header pipe, and the highest position of the connecting point between the liquid storage and drying cylinder and the second header pipe is close to the middle part of the second header pipe.

[0016] Further, the first edge plate is located above the plurality of flat tubes, and the second edge plate is located below the plurality of flat tubes.

[0017] Further, at least one of the first edge plate and the adjacent flat tube, the adjacent two flat tubes, and the second edge plate and the adjacent flat tube is provided with a heat dissipation fin.

[0018] Compared with the prior art, the heat exchanger has the following advantages:

[0019] The heat exchanger comprises a connecting support arranged on the first header pipe, and the gas inlet channel and the liquid outlet channel are integrated on the connecting support, so that the inlet and outlet of the refrigerant are integrated and arranged on the connecting support, and the arrangement of the air conditioner pipeline in the vehicle is facilitated. At the same time, the heat insulation structure arranged on the connecting support can separate the gas inlet channel and the liquid outlet channel, prevent heat conduction between the gas inlet channel and the liquid outlet channel, avoid the low supercooling degree of the refrigerant in the liquid outlet channel after heat absorption, and thus improve the refrigeration efficiency of the air conditioning system.

[0020] In addition, the refrigerant inlet is arranged above the refrigerant outlet, which is conducive to the smooth flow of the condensed refrigerant downward; the connecting bracket is arranged close to the refrigerant inlet, so that the length of the refrigerant inlet pipe is shortened, and the gaseous refrigerant at high temperature and high pressure flows into the flat tube through a shorter path for heat exchange, which is conducive to improving the heat exchange effect; the connecting bracket comprises a bracket main body and a connecting block, which is conducive to the reliable connection of the connecting bracket and the first header, and is conducive to the arrangement and forming of the gas inlet channel and the liquid outlet channel.

[0021] Secondly, the heat insulation structure adopts a heat insulation groove formed on the connecting block, which has a simple structure and is easy to manufacture and process, and can better separate the gas inlet channel and the liquid outlet channel and prevent the high temperature of the gas inlet channel from being transferred to the low temperature of the liquid outlet channel. The bracket main body comprises a first branch arm and a second branch arm, and one end of the first branch arm and the second branch arm is connected together, and the other end of the first branch arm and the second branch arm is connected to the connecting block, and the first branch arm, the second branch arm and the connecting block form a polygonal structure. Compared with the traditional structure which adopts a separate right-angle bent plate structure, the stability and strength of the connecting bracket can be increased, the connection is more stable, and cracks and fractures at the connection position during use due to vibration can be prevented.

[0022] Furthermore, the first and second partition plates can divide the heat exchanger into a supercooling zone and a plurality of non-supercooling zones above the supercooling zone, and the number of flat tubes in the non-supercooling zones decreases along the flow direction of the refrigerant, so that the heat exchange area is more reasonable and the optimization of the heat exchange process is facilitated. The ratio of the number of flat tubes in the supercooling zone to the total number of flat tubes in the heat exchanger is limited to 14% to 16%, so that the supercooling degree of the refrigerant at the refrigerant outlet can be improved, thereby improving the refrigeration efficiency of the air conditioning system.

[0023] In addition, the liquid storage and drying cylinder in communication with the second header can absorb moisture in the refrigerant, prevent moisture from damaging the system, filter impurities and pollutants in the refrigeration system, ensure normal operation of the system, store liquid refrigerant, and ensure the continuity and stability of the refrigerant flow. Moreover, the highest position of the connection point between the liquid storage and drying cylinder and the second header is arranged close to the middle of the second header, which can avoid the heat at the upper position of the second header being transferred to the liquid storage and drying cylinder through the connection point, causing the temperature of the refrigerant in the drying cylinder to rise, the specific volume to increase, and the formation of supercooling degree and the liquid storage function to be affected.

[0024] In addition, the first side plate and the second side plate are arranged, which can protect the upper flat tube and the lower flat tube, and can also increase the overall structural strength of the heat exchanger. The heat dissipation fins are arranged at least at one position between the first side plate and the adjacent flat tube, between the adjacent two flat tubes, and between the second side plate and the adjacent flat tube, which is beneficial to further improve the heat exchange effect.

[0025] Another purpose of the utility model lies in providing a vehicle, wherein the air conditioning system of the vehicle is provided with the heat exchanger.

[0026] The vehicle of the utility model, by adopting the heat exchanger, the inlet and outlet of refrigerant are arranged on the connecting support, which can facilitate the arrangement of the air conditioning pipeline in the vehicle, and the heat insulation structure on the connecting support can effectively separate the gas inlet channel and the liquid outlet channel, prevent heat conduction between the gas inlet channel and the liquid outlet channel, avoid the low supercooling degree of the refrigerant in the liquid outlet channel after heat absorption, thereby improving the refrigeration efficiency of the air conditioning system, and further improving the use performance of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings that form part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0028] Figure 1 The structure schematic view of the first perspective of the heat exchanger described in the utility model embodiment is shown in the figure;

[0029] Figure 2 The structure schematic view of the second perspective of the heat exchanger described in the utility model embodiment is shown in the figure;

[0030] Figure 3 The structure schematic view of the third perspective of the heat exchanger described in the utility model embodiment is shown in the figure;

[0031] Figure 4 The structure schematic view of the connecting support and the first header pipe in the matching state described in the utility model embodiment is shown in the figure;

[0032] Figure 5 The structure schematic view of the drying cylinder and the second header pipe in the matching state described in the utility model embodiment is shown in the figure;

[0033] Figure 6 The structure schematic view of the first perspective of the connecting support described in the utility model embodiment is shown in the figure;

[0034] Figure 7 The structure schematic view of the second perspective of the connecting support described in the utility model embodiment is shown in the figure;

[0035] Mark explanation:

[0036] 1, first manifold; 2, second manifold; 3, flat tube; 4, first side plate; 5, second side plate; 6, connecting support; 7, liquid storage drying cylinder;

[0037] 100, communication hole; 101, first partition plate a; 102, first partition plate b; 103, first upper sealing plate; 104, first lower sealing plate; 201, second partition plate a; 202, second partition plate b; 203, second upper sealing plate; 204, second lower sealing plate; 61, support main body; 62, connecting block body; 611, first supporting arm; 612, second supporting arm; 613, connecting end plate; 621, heat insulation groove; 701, first connecting block; 702, second connecting block; 703, third connecting block; 10, refrigerant inlet pipe; 20, refrigerant outlet pipe; 11, inlet passage; 22, outlet passage. DETAILED DESCRIPTION

[0038] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first", "second", etc. appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connection", "connecting", "connecting member" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0041] In addition, it should be noted that, in the description of the utility model, it should be noted that, in the embodiment used in the embodiment, the orientation words such as "up, down, left, right, front, back" are defined with the up-down direction, left-right direction and front-back direction of the automobile as the reference. Among them, the up-down direction of the automobile is also the height direction of the automobile, the front-back direction of the automobile is also the length direction of the automobile, and the left-right direction of the automobile is also the width direction of the automobile. "Inside, outside" is defined with the contour of the corresponding component as the reference, for example, the inside and outside of the vehicle are defined with the contour of the vehicle as the reference, the side close to the middle of the vehicle is "inside", and vice versa is "outside".

[0042] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] Embodiment one

[0044] The embodiment relates to a heat exchanger which can facilitate the arrangement of an air conditioner in a vehicle and also facilitate the improvement of the refrigeration efficiency of the air conditioning system.

[0045] In the overall structure, referring to Figures 1 to 3 The heat exchanger of the embodiment comprises a first header 1 and a second header 2 arranged vertically, and a plurality of flat tubes 3 arranged side by side between the first header 1 and the second header 2, and each flat tube 3 is in communication with the first header 1 and the second header 2.

[0046] Among them, the first header 1 is provided with a refrigerant inlet and a refrigerant outlet, and the first header 1 is provided with a connecting bracket 6, and the connecting bracket 6 is integrated with an air inlet channel 11 and a liquid outlet channel 22, and a heat insulation structure between the air inlet channel 11 and the liquid outlet channel 22. And, the air inlet channel 11 is in communication with the refrigerant inlet, the liquid outlet channel 22 is in communication with the refrigerant outlet, and the heat insulation structure is used to limit the heat transfer between the air inlet channel 11 and the liquid outlet channel 22.

[0047] At this time, as in the structure above, the connecting bracket 6 is arranged on the first header 1, so that the air inlet channel 11 and the liquid outlet channel 22 are integrated on the connecting bracket 6, the air inlet channel 11 is used for the high-temperature and high-pressure gaseous refrigerant to flow into the first header 1 through the refrigerant inlet on the first header 1, and the liquid outlet channel 22 is used for the low-temperature liquid refrigerant to flow out. In this way, the inlet and outlet of the refrigerant can be arranged integrally on the connecting bracket 6, so that the arrangement of the air conditioner pipeline in the vehicle can be facilitated. At the same time, the connecting bracket 6 is provided with a heat insulation structure, which can separate the air inlet channel 11 and the liquid outlet channel 22, prevent heat conduction between the air inlet channel 11 and the liquid outlet channel 22, avoid the refrigerant in the liquid outlet channel 22 from being overheated and the supercooling degree being too low, and thus facilitate the improvement of the refrigeration efficiency of the air conditioning system.

[0048] Based on the overall structure as above, in detail, continuing to refer to Figures 1 to 3 , and in combination withFigure 5 As shown in the drawings, the heat exchanger, i.e. the condenser, of the present embodiment comprises a first header 1, a second header 2 and a plurality of flat tubes 3. The first header 1 and the second header 2 are arranged vertically, and the plurality of flat tubes 3 are arranged side by side between the first header 1 and the second header 2. Moreover, a plurality of communication holes 100 are arranged at intervals on the wall surfaces of the first header 1 and the second header 2 which are arranged opposite to each other, and the two ends of each flat tube 3 are in communication with the communication holes 100 on the first header 1 and the corresponding communication holes 100 on the second header 2, respectively.

[0049] In some possible embodiments, the upper and lower ends of the first header 1 are fixedly connected with a first upper sealing plate 103 and a first lower sealing plate 104, respectively, which are used to seal the two ends of the first header 1. The upper and lower ends of the second header 2 are also fixedly connected with a second upper sealing plate 203 and a second lower sealing plate 204, respectively, which are used to seal the two ends of the second header 2.

[0050] In the present embodiment, as a preferred embodiment, a first side plate 4 and a second side plate 5 are connected between the first header 1 and the second header 2. The two ends of the first side plate 4 are fixedly connected to the first header 1 and the second header 2, respectively, and the two ends of the second side plate 5 are also fixedly connected to the first header 1 and the second header 2, respectively. Moreover, the first side plate 4 is located above the plurality of flat tubes 3, and the second side plate 5 is located below the plurality of flat tubes 3. At this time, the arrangement of the first side plate 4 and the second side plate 5 can not only protect the flat tubes 3 above and below, respectively, but also increase the overall structural strength of the heat exchanger.

[0051] As a further preferred embodiment, in the present embodiment, heat dissipation fins (not shown in the drawings) are arranged between the first side plate 4 and the adjacent flat tubes 3, between the adjacent two flat tubes 3, and between the second side plate 5 and the adjacent flat tubes 3. The arrangement of the heat dissipation fins is conducive to further improving the heat exchange effect. In specific implementation, the heat dissipation fins can be, for example, brazed between the first side plate 4 and the adjacent flat tubes 3, between the adjacent two flat tubes 3, and between the second side plate 5 and the adjacent flat tubes 3, so as to facilitate heat transfer between the flat tubes 3 and the heat dissipation fins.

[0052] It is worth mentioning that, in addition to being provided between the first side plate 4 and the adjacent flat tube 3, between the adjacent two flat tubes 3, and between the second side plate 5 and the adjacent flat tube 3, the heat dissipation fins can also be provided only between the first side plate 4 and the adjacent flat tube 3, or only between the adjacent two flat tubes 3, or only between the second side plate 5 and the adjacent flat tube 3, or between any two of the first side plate 4 and the adjacent flat tube 3, the adjacent two flat tubes 3, and the second side plate 5 and the adjacent flat tube 3.

[0053] In the embodiment, the upper end and the lower end of the first header 1 are respectively welded with a refrigerant inlet pipe 10 and a refrigerant outlet pipe 20, the end of the refrigerant inlet pipe 10 away from the first header 1 constitutes a refrigerant inlet, and the end of the refrigerant outlet pipe 20 away from the first header 1 constitutes a refrigerant outlet. In addition, the first header 1 is provided with a connecting bracket 6, the connecting bracket 6 is integrated with an inlet channel 11 and an outlet channel 22, the inlet channel 11 is in communication with the refrigerant inlet, and the outlet channel 22 is in communication with the refrigerant outlet. At the same time, the connecting bracket 6 is also provided with a heat insulation structure between the inlet channel 11 and the outlet channel 22 to prevent heat conduction between the inlet channel 11 and the outlet channel 22 and to avoid that the refrigerant in the outlet channel 22 is overheated and has a low supercooling degree.

[0054] As a preferred embodiment, referring to Figures 1 to 4 , and combining Figure 6 and Figure 7 shown, in the embodiment, the refrigerant inlet is located above the refrigerant outlet, which is beneficial to the smooth downward flow of the condensed refrigerant. The connecting bracket 6 of the embodiment is arranged close to the refrigerant inlet, and the connecting bracket 6 includes a bracket body 61 connected with the first header 1 and a connecting block 62 integrally formed on the bracket body 61, wherein the inlet channel 11 and the outlet channel 22 are arranged on the connecting block 62.

[0055] At this time, the bracket body 61 can facilitate the reliable connection of the connecting bracket 6 with the first header 1, and the connecting block 62 can provide a layout basis for the inlet channel 11 and the outlet channel 22 and also facilitate the molding and preparation of the inlet channel 11 and the outlet channel 22.

[0056] Specifically, as a preferred embodiment, referring to Figure 6 and Figure 7 shown, the bracket body 61 of the embodiment includes a connecting end plate 613 fixedly connected with the first header 1. The connecting end plate 613 can be pre-fixed on the first header 1 by riveting and then fixedly connected with the first header 1 by brazing.

[0057] The support body 61 of the embodiment also comprises a first support arm 611 and a second support arm 612, one end of the first support arm 611 and the second support arm 612 are connected together and connected with the connecting end plate 613, the other end of the first support arm 611 and the second support arm 612 are connected with the connecting block 62. Moreover, the second support arm 612 is in a bent shape, the first support arm 611, the second support arm 612 and the connecting block 62 are connected to form a polygonal structure. It is worth mentioning here that the polygonal structure can be a triangle, a quadrilateral or other polygonal structure.

[0058] At this time, the support body 61 adopts the above structure, and by means of the polygonal structure formed, compared with the structure of a single right-angled bent plate in the conventional structure, not only the stability and strength of the connecting support 6 can be increased, but also the connection is more stable, and the leakage caused by cracks and fractures at the connection position due to vibration during use can be prevented.

[0059] As a more preferred embodiment, in the embodiment, the heat insulation structure comprises a heat insulation groove 621 formed on the connecting block 62, and the gas inlet channel 11 and the liquid outlet channel 22 are located on both sides of the heat insulation groove 621. The heat insulation structure adopts the heat insulation groove 621, which has a simple structure, is easy to manufacture and process, and can better separate the gas inlet channel 11 and the liquid outlet channel 22 to prevent the high temperature of the gas inlet channel 11 from being transmitted to the low temperature of the liquid outlet channel 22.

[0060] In the embodiment, as preferred, a plurality of first partition plates are arranged in the first header 1, and a plurality of second partition plates are arranged in the second header 2, the plurality of first partition plates and the plurality of second partition plates separate the refrigerant heat exchange path in the heat exchanger into a supercooling area and a plurality of non-supercooling areas above the supercooling area. Moreover, along the flow direction of the refrigerant, the number of the flat tubes 3 in the plurality of non-supercooling areas gradually decreases. In this way, the heat exchange area is more reasonable, thereby facilitating the optimization of the heat exchange process.

[0061] Specifically, referring to Figures 1 to 5 In the embodiment, two first partition plates, i.e., a first partition plate a101 and a first partition plate b102, are arranged on the first header 1. Two second partition plates, i.e., a second partition plate a201 and a second partition plate b202, are arranged on the second header 2. The position of the first partition plate a101 is higher than that of the second partition plate a201, and the first partition plate b102 and the second partition plate b202 are arranged at the same height.

[0062] In this way, the refrigerant heat exchange path is divided into three non-supercooling zones located above and a supercooling zone located below, that is, from top to bottom, the first non-supercooling zone, the second non-supercooling zone, the third non-supercooling zone, and the supercooling zone. And along the flow direction of the refrigerant, the number of flat tubes 3 in the first non-supercooling zone, the second non-supercooling zone, and the third non-supercooling zone decreases in turn.

[0063] In specific implementation, the first and second collecting pipes 1 and 2 are each provided with a partition groove, and the first partition a101 and the first partition b102, and the second partition a201 and the second partition b202 are respectively riveted in the corresponding partition groove. The first partition a101 and the first partition b102, and the second partition a201 and the second partition b202 can be in a round sheet structure or an approximate round sheet structure, as long as they can block the space above and below in the first and second collecting pipes 1 and 2.

[0064] It is also worth pointing out here that the first upper sealing plate 103, the first lower sealing plate 104, and the second upper sealing plate 203 and the second lower sealing plate 204 can also be in a round sheet structure or an approximate round sheet structure like the multiple partitions, and then be connected by riveting with the corresponding mounting slots and be respectively and fixedly connected at both ends of the first and second collecting pipes 1 and 2.

[0065] As a further preferred embodiment, in the embodiment, the ratio i of the number of flat tubes 3 in the supercooling zone to the total number of flat tubes 3 in the heat exchanger satisfies: 14%≤i≤16%. At this time, the ratio of the number of flat tubes 3 in the supercooling zone to the total number of flat tubes 3 in the heat exchanger is limited, which can improve the supercooling degree of the refrigerant at the outlet of the refrigerant, thereby improving the refrigeration efficiency of the air conditioning system.

[0066] Since the refrigerant becomes a supercooled liquid after passing through the flat tubes 3 in the supercooling zone, when the number of flat tubes 3 in the supercooling zone is small, the refrigerant after passing through the flat tubes 3 in the supercooling zone can be a gas-liquid two-phase medium, a saturated liquid, or a liquid with a low supercooling degree. At this time, by appropriately increasing the proportion of the number of flat tubes 3 in the supercooling zone, the supercooling degree of the refrigerant after flowing through the supercooling zone will be improved. Generally, the proportion of the number of flat tubes 3 in the supercooling zone is about 10%-12%, and in the embodiment, the number of flat tubes 3 in the supercooling zone is increased to 14%-16%, which can improve the supercooling degree of the refrigerant at the outlet. In specific implementation, the proportion of the number of flat tubes 3 in the supercooling zone can be, for example, 14%, 14.5%, 15%, 15.5%, or 16%, etc.

[0067] In addition, the heat exchanger of the embodiment further comprises a liquid storage drying cylinder 7 in communication with the second header 2. The inlet and outlet of the liquid storage drying cylinder 7 are arranged close to the bottom end of the second header 2, and the highest position of the connecting point between the liquid storage drying cylinder 7 and the second header 2 is close to the middle of the second header 2. At this time, the liquid storage drying cylinder 7 in communication with the second header 2 can absorb the moisture in the refrigerant, prevent the damage of moisture to the system, filter the impurities and pollutants in the refrigeration system, ensure the normal operation of the system, and also can store the liquid refrigerant, ensure the continuity and stability of the refrigerant flow.

[0068] Moreover, the highest position of the connecting point between the liquid storage drying cylinder 7 and the second header 2 is arranged close to the middle of the second header 2, compared with being arranged at the upper position of the second header 2, the heat at the upper position of the second header 2 can be avoided to be transferred to the liquid storage drying cylinder 7 through the connecting point, so that the temperature of the refrigerant in the drying cylinder is not increased, the specific volume is not changed, and the formation of the supercooling degree and the play of the liquid storage function are not affected.

[0069] Referring to Figure 5 , and combining Figures 1 to 3 shown, in the embodiment, the first connecting block 701, the second connecting block 702 and the third connecting block 702 are sequentially arranged on the cylinder wall of the liquid storage drying cylinder 7 from top to bottom, and the liquid storage drying cylinder 7 is brazed to the second header 2 through the first connecting block 701, the second connecting block 702 and the third connecting block 703.

[0070] In the traditional structure, the first connecting block 701 is usually located at the uppermost part of the liquid storage drying cylinder 7, at this time, the position of the first connecting block 701 connected with the second header 2 is just in the first non-supercooling area, and the refrigerant in this area is high-temperature and high-pressure superheated steam, the heat of which can be transferred to the gas-liquid two-phase refrigerant in the liquid storage drying cylinder 7 through the first connecting block 701, so that the temperature of the refrigerant stored in the liquid storage drying cylinder 7 after passing through the three non-supercooling areas is increased, the specific volume is changed, and the formation of the supercooling degree and the play of the liquid storage function are affected.

[0071] Therefore, in the embodiment, the highest position of the connecting point between the liquid storage drying cylinder 7 and the second header 2 is arranged close to the middle of the second header 2. That is, the position of the first connecting block 701 is adjusted to the second non-supercooling area, so that the heat conduction between the second header 2 and the refrigerant in the liquid storage drying cylinder 7 is reduced, and the supercooling degree is improved.

[0072] In the embodiment, the second connecting block 702 and the third connecting block 703 are arranged close to the bottom end of the second header 2, and the second connecting block 702 is provided with an inlet communicated with the liquid storage drying cylinder 7, and the third connecting block 703 is provided with an outlet communicated with the liquid storage drying cylinder 7, when the second connecting block 702 and the third connecting block 703 are connected to the second header 2, the inlet and the outlet are respectively communicated with the communication ports formed on the second header 2, so that the refrigerant flowing into the second header 2 flows to the liquid storage drying cylinder 7, and then flows to the flat tube 3, the first header 1, and then flows out through the refrigerant outlet pipe 20.

[0073] In the working process of the heat exchanger of the embodiment, the flow path of the refrigerant is as shown by arrows in the figure, the high-temperature and high-pressure gaseous refrigerant delivered by the compressor enters into the first header 1 through the gas inlet passage 11 on the connecting bracket 6 and the refrigerant inlet pipe 10, and then flows into the second header 2 through the flat tube 3 in the first non-supercooling area, and then flows through the flat tube 3 in the second non-supercooling area, the first header 1, the flat tube 3 in the third non-supercooling area, the second header 2 and the second connecting block 702 in sequence, flows into the liquid storage drying cylinder 7, and then flows out through the third connecting block 703, and then flows through the flat tube 3 in the supercooling area, the first header 1 and the refrigerant outlet pipe 20 in sequence, flows into the liquid outlet passage 22 on the connecting bracket 6, and finally is discharged from the liquid outlet passage 22, thereby completing a complete heat exchange path. Figure 3

[0074] Embodiment two

[0075] The embodiment relates to a vehicle, and the air conditioning system of the vehicle is provided with the heat exchanger of the embodiment one.

[0076] In the vehicle of the embodiment, the heat exchanger of the embodiment one is adopted, the inlet and the outlet of the refrigerant are arranged on the connecting bracket 6, the arrangement of the air conditioning pipeline in the vehicle is facilitated, the heat insulation structure on the connecting bracket 6 can effectively separate the gas inlet passage 11 and the liquid outlet passage 22, the heat conduction between the gas inlet passage 11 and the liquid outlet passage 22 is prevented, the supercooling degree of the refrigerant in the liquid outlet passage 22 after heat absorption is low, and therefore the refrigeration efficiency of the air conditioning system is improved, and the use performance of the vehicle is improved.

[0077] The above only describes preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.​

Claims

1. A heat exchanger, characterized in that: a first header (1) and a second header (2) are arranged vertically, and a plurality of flat tubes (3) are arranged side by side between the first header (1) and the second header (2), each of the flat tubes (3) being in communication with the first header (1) and the second header (2) respectively; the first header (1) is provided with a refrigerant inlet and a refrigerant outlet, and the first header (1) is provided with a connecting bracket (6), the connecting bracket (6) is integrated with an air inlet channel (11) and a liquid outlet channel (22), and a heat insulation structure between the air inlet channel (11) and the liquid outlet channel (22); the air inlet channel (11) is in communication with the refrigerant inlet, the liquid outlet channel (22) is in communication with the refrigerant outlet, and the heat insulation structure is used to limit the heat transfer between the air inlet channel (11) and the liquid outlet channel (22).

2. The heat exchanger according to claim 1, characterized in that: the refrigerant inlet is located above the refrigerant outlet; the connecting bracket (6) is arranged close to the refrigerant inlet, and the connecting bracket (6) comprises a bracket body (61) connected with the first header (1), and a connecting block (62) integrally formed on the bracket body (61); the air inlet channel (11) and the liquid outlet channel (22) are arranged on the connecting block (62).

3. The heat exchanger according to claim 2, characterized in that: the heat insulation structure comprises a heat insulation groove (621) formed on the connecting block (62); the air inlet channel (11) and the liquid outlet channel (22) are located on both sides of the heat insulation groove (621).

4. The heat exchanger according to claim 2, characterized in that: the bracket body (61) comprises a first branch arm (611) and a second branch arm (612), one end of the first branch arm (611) and the second branch arm (612) is connected together, the other end of the first branch arm (611) and the second branch arm (612) is connected with the connecting block (62); the second branch arm (612) is in a bent shape, and the first branch arm (611), the second branch arm (612) and the connecting block (62) form a polygonal structure.

5. The heat exchanger according to claim 1, characterized in that: a plurality of first partition plates are arranged in the first header (1), and a plurality of second partition plates are arranged in the second header (2); the refrigerant heat exchange paths in the heat exchanger are divided into a supercooling zone and a plurality of non-supercooling zones above the supercooling zone by the plurality of first partition plates and the plurality of second partition plates; the number of the flat tubes (3) in the plurality of non-supercooling zones gradually decreases in the flow direction of the refrigerant.

6. The heat exchanger according to claim 5, characterized in that: the ratio i of the number of the flat tubes (3) in the supercooling zone to the total number of the flat tubes (3) in the heat exchanger satisfies 14%≤i≤16%. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The heat exchanger according to claim 1, characterized in that: a liquid storage and drying cylinder (7) is further arranged in communication with the second header (2); the inlet and outlet of the liquid storage and drying cylinder (7) are arranged close to the bottom end of the second header (2), and the highest point of the connecting point between the liquid storage and drying cylinder (7) and the second header (2) is close to the middle of the second header (2).

8. The heat exchanger according to any one of claims 1 to 7, characterized in that: a first side plate (4) and a second side plate (5) are arranged between the first header (1) and the second header (2); the first side plate (4) is arranged above a plurality of the flat tubes (3), and the second side plate (5) is arranged below a plurality of the flat tubes (3).

9. The heat exchanger according to claim 8, characterized in that: at least one of the following is provided with a heat dissipation fin: between the first side plate (4) and the adjacent flat tube (3), between two adjacent flat tubes (3), and between the second side plate (5) and the adjacent flat tube (3).

10. A vehicle, characterized in that: the air conditioning system of the vehicle is provided with the heat exchanger according to any one of claims 1 to 9.

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