Heat exchanger and vehicle-mounted refrigerator

Abstract

The utility model relates to a heat exchanger and a vehicle-mounted refrigerator, the heat exchanger comprises a first collecting pipe, a second collecting pipe, a third collecting pipe, a heat exchange pipe, a first connector and a second connector, and the first collecting pipe and the second collecting pipe are arranged at an interval; the third header, the first header and the second header are arranged at intervals, the third header comprises a first pipe section and a second pipe section, and the first pipe section and the second pipe section are arranged in the length direction of the third header; the heat exchange pipes comprise a plurality of first heat exchange pipes and a plurality of second heat exchange pipes, and the first heat exchange pipes communicate with the first collecting pipe and the third collecting pipe; the plurality of second heat exchange pipes are communicated with the second header and the third header; the first connector is located on the first pipe section. The second connector is located on the second pipe section. The heat exchanger has a more uniform heat exchange effect during working.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a heat exchanger and a vehicle refrigerator. Background Art

[0002] With the development of the electric vehicle market, some high-end models have been equipped with car refrigerators. Car refrigerators are small in size, and correspondingly require smaller heat exchangers to meet the heat exchange needs of car refrigerators. In related technologies, the heat exchangers of car refrigerators mostly include two headers and heat exchange tubes arranged between the two headers. When the heat exchanger is running, the refrigerant flows in a single-flow multi-flow path between the two headers to achieve heat exchange. However, because the heat exchanger is small in size and the refrigerant charge is less, the single-flow multi-flow flow mode will cause the heat exchange effect of the refrigerant in the rear part of the heat exchanger to be more significantly reduced. The heat exchange between the front part and the rear part of the heat exchanger is uneven, which affects the cooling effect of the car refrigerator. Utility Model Content

[0003] A first aspect of the present application provides a heat exchanger, which has a more uniform heat exchange effect when working.

[0004] A heat exchanger provided in a first aspect of the present application includes: a first header and a second header, wherein the first header and the second header are arranged at intervals;

[0005] a third header, the third header being arranged at intervals with the first header and the second header, the third header comprising a first pipe section and a second pipe section, the third header further comprising a first interface and a second interface, the first interface being located in the first pipe section, and the second interface being located in the second pipe section;

[0006] The heat exchange tubes include a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, wherein the plurality of first heat exchange tubes are connected to the first header and the third header; and the plurality of second heat exchange tubes are connected to the second header and the third header.

[0007] The beneficial effects of this application are:

[0008] When the heat exchanger of the present application is actually working, the refrigerant can enter the first pipe section from the first interface, and then be divided in the first pipe section. A part of the refrigerant can enter the first header through the first heat exchange tube, and after the first header converges, it flows to the second pipe section through the connected first heat exchange tube; another part of the refrigerant can enter the second header through the second heat exchange tube, and after the second header converges, it flows to the second pipe section through the connected second heat exchange tube. In such a flow process, the refrigerant is divided into two paths in the first pipe section and flows and exchanges heat separately, shortening the process that the refrigerant needs to go through when flowing in the heat exchanger, thereby making the heat exchange effect of the heat exchanger more uniform.

[0009] A second aspect of the present application provides a vehicle-mounted refrigerator having a more uniform cooling effect.

[0010] The vehicle refrigerator provided in the second aspect of the present application includes an inner tank and a heat exchanger, wherein the heat exchanger is the heat exchanger in the embodiment of the first aspect, the first header and the second header are respectively located on opposite sides of the inner tank, and the heat exchange tube is attached to the outer wall of the inner tank.

[0011] The beneficial effects of this application are:

[0012] The vehicle refrigerator of the present application includes the heat exchanger in the first aspect embodiment. Since the heat exchanger in the first aspect embodiment has a more uniform heat exchange effect, the vehicle refrigerator also has a more uniform cooling effect accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the overall structure of a heat exchanger provided in the present application in a specific embodiment;

[0014] Figure 2 for Figure 1 A-direction structural schematic diagram;

[0015] Figure 3 for Figure 1 Schematic diagram of the B-direction structure;

[0016] Figure 4 A schematic cross-sectional view of a heat exchange tube provided in the present application in a specific embodiment;

[0017] Figure 5 A schematic diagram of a partially enlarged structure of a heat exchange tube provided in this application;

[0018] Figure 6 A schematic diagram of the three-dimensional structure of the inner tank and heat exchanger of the vehicle refrigerator provided in this application;

[0019] Figure 7 for Figure 6 A schematic diagram of the side structure of one side;

[0020] Figure 8 for Figure 6 A schematic diagram of the side structure of one side.

[0021] Figure numerals: first header 1, second header 2, third header 3, first pipe section 31, second pipe section 32, heat exchange tube 4, first heat exchange tube 41, first sub-segment 411, second sub-segment 412, first bent section 413, second heat exchange tube 42, third sub-segment 421, fourth sub-segment 422, second bent section 423, third bent section 43, channel 44, necking section 45, transition section 46, first interface 5, second interface 6, barrier 7, inner liner 8.

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0023] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0024] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0026] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0028] With the development of the electric vehicle market, some high-end models have been equipped with car refrigerators. Electric vehicles are usually equipped with large-capacity batteries and efficient energy management systems, which can continuously provide power for the car refrigerator. Moreover, since the power of the car refrigerator is relatively low, the power consumed is negligible compared to the total power of the vehicle, and it has almost no impact on the vehicle's range. In addition, new energy vehicles can also power the car refrigerator through the power battery when parked, achieving long-term uninterrupted refrigeration or insulation functions. With the development of electric vehicle intelligence, the car refrigerator can be better integrated with the vehicle system to achieve remote control, temperature setting and other functions, becoming part of the in-vehicle ecosystem, and is expected to become a standard configuration of electric vehicles.

[0029] At present, there are mainly two types of car refrigerators: semiconductor refrigerators and compressor refrigerators. Among them, semiconductor car refrigerators have obvious shortcomings such as weak refrigeration capacity, inability to achieve low-temperature freezing effect in high-temperature environment, high maintenance cost, lack of stable heating function, short life, etc., and are not suitable for large-scale promotion in electric vehicles. Therefore, economical, compact and reliable compressor car refrigerators are still the clearest development direction of car refrigerators.

[0030] like Figure 1-5 As shown, the first aspect of the embodiment of the present application provides a heat exchanger, which can be used as an important component of a car refrigerator and is better adapted to the car refrigerator. This article also takes the application of the heat exchanger in the car refrigerator as an example to describe the technical solution and technical effects. Of course, the application field of the heat exchanger in the embodiment of the present application is not limited to the description in this article, and can also be used in other systems, such as water heaters, household air conditioners, household refrigerators and other refrigeration systems.

[0031] like Figure 1-5 As shown, the heat exchanger provided in the first aspect of the embodiment of the present application mainly includes a first header 1, a second header 2, a third header 3, a heat exchange tube 4, a first interface 5 and a second interface 6. Specifically, the first header 1 is arranged at intervals with the second header 2; the third header 3 is arranged at intervals with the first header 1 and the second header 2, and the third header 3 includes a first pipe section 31 and a second pipe section 32, and the first pipe section 31 and the second pipe section 32 are arranged along the length direction of the third header 3; the heat exchange tube 4 includes a plurality of first heat exchange tubes 41 and a plurality of second heat exchange tubes 42, and the plurality of first heat exchange tubes 41 connect the first header 1 and the third header 3; the plurality of second heat exchange tubes 42 connect the second header 2 and the third header 3; the first interface 5 is located at the first pipe section 31, and the second interface 6 is located at the second pipe section 32. During the operation of the heat exchanger, the first interface 5 and the second interface 6 are the inlet and outlet of the refrigerant.

[0032] In this embodiment, the first header 1, the second header 2, and the third header 3 are arranged at intervals, that is, there is a certain interval between the first header 1, the second header 2, and the third header 3, and the distance and position of the interval mainly depend on the overall size and shape of the heat exchanger. For example, in this embodiment, the first header 1, the second header 2, the third header 3 and the heat exchange tube 4 are roughly U-shaped after the connection is completed. The first header 1, the second header 2, the third header 3 and the heat exchange tube 4 are fixedly connected by brazing. The first header 1 and the second header 2 are respectively located at the two ends of the U-shaped structure, and the third header 3 is located at the bottom of the U-shaped structure. In addition, the first header 1, the second header 2 and the third header 3 are arranged roughly in parallel, but in some other embodiments, in order to adapt to the installation environment or under some other working conditions, the first header 1 and the second header 2 can also be tilted relative to the third header 3, which is not specifically limited in this article.

[0033] The first pipe section 31 and the second pipe section 32 of the third header 3 are isolated from each other. The isolation mentioned here means that the first pipe section 31 and the second pipe section 32 are not connected to each other, that is, in the absence of other connecting parts connecting the two, the refrigerants in the first pipe section 31 and the second pipe section 32 cannot flow to each other. The first pipe section 31 and the second pipe section 32 can be formed by welding two pipes, or can be separated by a pipe, which will be explained in subsequent embodiments of this article. In addition, the lengths of the first pipe section 31 and the second pipe section 32 can also be allocated and set according to actual needs. For example, when the second pipe section 32 needs to be divided into more independent cavities so that the heat exchanger has more processes, the length of the first pipe section 31 can be reduced. However, in general, when the heat exchanger is applied to a car refrigerator, because the overall volume of the car refrigerator is small, the volume of the corresponding heat exchanger is also small, so it is not necessary to divide the first pipe section 31 and the second pipe section 32 into too many processes.

[0034] like Figure 3 As shown, in this embodiment, the cross-sectional shape of the third header 3 is roughly rectangular, so that it can better fit the outer wall of the heat exchange component and is more convenient for connecting the heat exchange tubes 4 on both sides with the third header 3. The cross-sectional shape of the first header 1 and the second header 2 can be circular, or other shapes such as rectangle. In addition, the flow cross-sectional area of ​​the third header 3 is larger than the flow cross-sectional area of ​​the first header 1 and the second header 2, so that the refrigerant flow rate in the third header 3 can be increased, thereby ensuring that the refrigerant flow rate after diversion can better meet the heat exchange requirements. It should be noted that the cross-sectional shapes of the first header 1, the second header 2 and the third header 3 can also be other shapes, such as polygons or irregular shapes set according to the installation environment, etc., which will not be described one by one in this article.

[0035] When the heat exchanger of this embodiment is working, the refrigerant enters the first pipe section 31 from the first interface 5, and then is divided in the first pipe section 31. A part of the refrigerant enters the first header 1 through the first heat exchange tube 41, and after converging in the first header 1, it flows to the second pipe section 32 through the connected first heat exchange tube 41; another part of the refrigerant enters the second header 2 through the second heat exchange tube 42, and after converging in the second header 2, it flows to the second pipe section 32 through the connected second heat exchange tube 42, and then flows out from the second interface 6. In such a flow process, the refrigerant is divided into two paths in the first pipe section 31 and flows and exchanges heat separately, shortening the process that the refrigerant needs to go through when flowing in the heat exchanger, thereby making the heat exchange effect of the heat exchanger more uniform.

[0036] It should be noted that the method of heat exchange by diverting the third header 3 increases the flow path of the refrigerant, so that the refrigerant charge can be appropriately increased, thereby improving the heat exchange efficiency of the heat exchanger. The heat exchange performance of the small-volume heat exchanger is greatly improved, and when it is applied to a car refrigerator, it can also make the car refrigerator have a better cooling effect.

[0037] like Figure 3 As shown, in a specific embodiment, the first heat exchange tube 41 includes a first sub-segment 411, a second sub-segment 412 and a first curved segment 413, the first curved segment 413 connects the first sub-segment 411 and the second sub-segment 412, the first sub-segment 411 is connected to the first header 1, and the second sub-segment 412 is connected to the third header 3; and / or, the second heat exchange tube 42 includes a third sub-segment 421, a fourth sub-segment 422 and a second curved segment 423, the second curved segment 423 connects the third sub-segment 421 and the fourth sub-segment 422, the third sub-segment 421 is connected to the second header 2, and the fourth sub-segment 422 is connected to the third header 3. If the length direction of the first sub-segment 411 or the third sub-segment 421 is defined as the first direction, the third header 3 is located on the same side of the first header 1 and the second header 2 in the first direction.

[0038] In this embodiment, the first sub-segment 411, the second sub-segment 412 and the first curved segment 413 are combined to form the first heat exchange tube 41. Generally speaking, the first sub-segment 411, the second sub-segment 412 and the first curved segment 413 are formed by bending a whole first heat exchange tube 41. The lengths of the first sub-segment 411 and the second sub-segment 412 can be preset according to the actual installation size. For example, according to the size of the vehicle refrigerator, the length of the first sub-segment 411 can be greater than the length of the second sub-segment 412, and of course, it can also be less than or equal to the length of the second sub-segment 412. This article does not make specific restrictions on this.

[0039] In addition, the third sub-segment 421, the fourth sub-segment 422 and the second curved segment 423 are combined to form the second heat exchange tube 42. The third sub-segment 421, the fourth sub-segment 422 and the second curved segment 423 can also be formed by bending a whole first heat exchange tube 41. Similarly, its length can also be preset and adjusted according to actual needs. It should be noted that the size specifications of the first heat exchange tube 41 and the second heat exchange tube 42 can be the same or different. Generally speaking, when the heat exchanger is applied to a car refrigerator, the size specifications and structure of the first heat exchange tube 41 and the second heat exchange tube 42 are the same.

[0040] like Figure 4As shown, in a specific embodiment, the heat exchange tube 4 has a plurality of channels 44, and the plurality of channels 44 are arranged at intervals along the width direction of the heat exchange tube 4; if the width of the heat exchange tube 4 is defined as a, the thickness of the heat exchange tube 4 is defined as b, the width of the channel 44 is defined as f, the height of the channel 44 is defined as h, the number of channels 44 in one heat exchange tube 4 is defined as n, and the bending radius of the first bending section 413 or the second bending section 423 is defined as x, then x satisfies: 0.03≤(ab-fhn) / (0.785*x²)≤0.79.

[0041] In the present embodiment, the heat exchange tube 4 is a microchannel flat tube (i.e., the first heat exchange tube 41 and the second heat exchange tube 42 are both microchannel flat tubes), which are generally flat in shape. The circulation heat exchange method of multiple channels 44 helps to improve the distribution uniformity of the refrigerant during the heat exchange process and avoid local overheating or overcooling. Moreover, the microchannel structure has a higher heat exchange area and volume ratio, which can achieve a greater heat exchange effect in a smaller space, which is in line with the trend of compactness and lightweight of electric vehicle onboard electrical appliances.

[0042] In addition, taking the first heat exchange tube 41 as an example, because the first heat exchange tube 41 has a first bending section 413, and the angle between the first sub-segment 411 and the second sub-segment 412 is approximately 90° to adapt to the shape of the vehicle refrigerator, the first bending section 413 needs to have a certain bending radius to avoid bending causing the flow cross-sectional area of ​​the channel 44 at the first bending section 413 to be too small and affect the flow of the refrigerant. The bending radius of the first bending section 413 mainly depends on the proportion of the channel 44 to the first heat exchange tube 41. If the flow cross-sectional area of ​​the channel 44 is large and accounts for a high proportion in the first heat exchange tube 41, the wall of the first heat exchange tube 41 becomes thinner accordingly, and it is more likely to expose the ribs or the internal channel 44 is severely deformed when bending, affecting the flow of the refrigerant; however, when the flow cross-sectional area of ​​the channel 44 is small or the number is small, and the proportion in the first heat exchange tube 41 is low, the wall of the first heat exchange tube 41 will be thicker accordingly, which will cause the first heat exchange tube 41 to be too heavy and the flow cross-sectional area of ​​the channel 44 to be too small, thus affecting the heat exchange. In addition, it will also increase the manufacturing cost, reduce the performance of the heat exchanger, and make the refrigeration effect of the vehicle refrigerator worse. Therefore, when the above parameters meet: 0.03≤(ab-fhn) / (0.785*x²)≤0.79, the effect is better.

[0043] Similarly, the second curved section 423 of the second heat exchange tube 42 will also have a similar situation when bending. Therefore, the second curved section 423 of the second heat exchange tube 42 has a better effect when it meets the above parameter conditions, which will not be described in detail herein.

[0044] It should be noted that after the product size of the heat exchange tube 4 (the first heat exchange tube 41 and the second heat exchange tube 42) is finalized, the width a of the heat exchange tube 4, the thickness b of the heat exchange tube 4, the width f of the channel 44, the height h of the channel 44, and the number n of the channels 44 in one heat exchange tube 4 are all fixed values ​​that can be measured. Therefore, it is only necessary to determine the bending radius range of the heat exchange tube of this model according to the preset range and then apply it to different scenarios, or calculate the suitable model of the heat exchange tube 4 according to the bending radius x of the bending section.

[0045] like Figure 4 As shown, in a specific embodiment, the number n of channels 44 in a heat exchange tube 4 and the width a of the heat exchange tube 4, the width f of the channel 44, and the bending radius x of the first curved section 413 and / or the second curved section 423 satisfy: 0.014≤(a-fn) / (n+1) / x≤0.07. If the above ratio is less than 0.014, the heat exchange tube 4 may have exposed ribs and internal flow channel deformation after bending. If it is greater than 0.07, the product will be too heavy and the flow area of ​​the flat tube will be too small. Therefore, the refrigerant flow rate at the curved section 413 can only be guaranteed when it is kept within a certain range.

[0046] like Figure 5 As shown, in a specific embodiment, the heat exchange tube 4 includes a necking section 45, the necking section 45 is located at one end of the second sub-segment 412 away from the curved section 413, and / or the necking section 45 is located at one end of the fourth sub-segment 422 away from the second curved section 423,

[0047] The cross-sectional area of ​​the tapered section 45 is smaller than the cross-sectional area of ​​the second sub-segment 412 or the fourth sub-segment 422 ; if the length of the tapered section 45 is defined as d, and the inner cavity length of the third manifold 3 in the second direction is j, then: 1.2≤j / 2d≤2.4, and the second direction is the length direction of the second sub-segment 412 or the fourth sub-segment 422 .

[0048] Taking the first heat exchange tube 41 in the heat exchange tube 4 as an example, the depth of the first heat exchange tube 41 inserted into the third header 3 can be better controlled by setting the necking section 45. Because the first heat exchange tube 41 and the second heat exchange tube 42 are inserted on both sides of the third header 3 and are respectively connected to the first header 1 and the second header 2, that is, the third header 3 has two heat exchange tubes 4 inserted at the same height, so the insertion depth of the heat exchange tube 4 is particularly important for the distribution of the third header 3. If it is inserted too deep, the remaining space between the two heat exchange tubes 4 will be too small, affecting the distribution of the refrigerant. The necking section 45 can intuitively control the insertion depth of the first heat exchange tube 41. Generally speaking, the inner cavity length j of the third header 3 in the second direction and the necking section length d have a certain difference, that is, 1.2≤j / 2d≤2.4 in this embodiment.

[0049] If the ratio between the inner cavity length j of the third header 3 in the second direction and the length d of the necking section is less than 1.2, it will cause uneven flow distribution inside the heat exchanger and even the refrigerant cannot enter the flow channel, reducing the performance of the heat exchanger. If it is greater than 2.4, it will cause the solder to enter the flow channel along the heat exchange tube 4, resulting in blockage of the flow channel. In addition, a necking section 45 can also be provided at one end of the first sub-segment 411 away from the first curved section 413, so as to control the depth of the first heat exchange tube 41 inserted into the first header 1. Similarly, the layout and design of the same structure as the first heat exchange tube 41 can also be performed on the second heat exchange tube 42. Since the structures of the first heat exchange tube 41 and the second heat exchange tube 42 can be the same, they will not be elaborated in this article.

[0050] like Figure 5 As shown, in a specific embodiment, the heat exchange tube 4 further includes a transition section 46, the transition section 46 connects the second subsection 412 and the necking section 45, and / or the transition section 46 connects the fourth subsection 422 and the necking section 45, the width of the transition section 46 decreases linearly from the second subsection 412 or the fourth subsection 422 to the necking section 45, that is, the side of the transition section is a slope surface that gradually decreases from the second subsection 412 to the necking section 45, if the angle between the transition section 46 and the second subsection 412, or the angle between the transition section 46 and the fourth subsection 422 is defined as α, then 30°≤α<90°. The transition section 46 can increase the contact area of ​​the connection between the heat exchange tube 4 and the corresponding header, so that the connection of the heat exchanger is more stable and firm after brazing connection.

[0051] In a specific embodiment, if the cross-sectional radius of the first header 1 or the second header 2 is defined as r, then r and the inner cavity length j of the third header 3 in the second direction satisfy: 0.6≤2πr² / j²≤1.3. As mentioned above, the refrigerant first enters the third header 3 and then flows into the heat exchange tubes 4 connected to the first header 1 or the second header 2. Therefore, the flow cross-sectional area of ​​the third header 3 needs to be larger than the flow cross-sectional area of ​​the first header 1 or the second header 2. When the ratio of the two is less than 0.6, the local resistance of the refrigerant in the system will increase. If it is greater than 1.3, the unnecessary refrigerant charge will increase, which is not in line with the lightweight and future environmental protection trends of vehicle refrigerators.

[0052] like Figure 1-3As shown, in a specific embodiment, the heat exchanger further includes a barrier 7, the barrier 7 is at least partially located on the third header 3, the first pipe section 31 and the second pipe section 32 are respectively located on both sides of the barrier 7; or there are multiple barriers 7, and the multiple barriers 7 are respectively located on the first header 1, the second header 2 and the third header 3. The heat exchanger can be divided into multiple processes by the barrier 7, but as mentioned above, the vehicle refrigerator is small in size. If there are more processes, the refrigerant heat exchange capacity of the latter half of the process is weak. Therefore, generally speaking, it is sufficient to divide the entire heat exchanger into 2-3 processes.

[0053] In this embodiment, the tube cavity of the third header 3 can be blocked by the blocking member 7 to form a first tube section 31 and a second tube section 32 that are isolated from each other. The blocking member 7 can be a partition or a blocking block. It should be noted that at least part of the blocking member 7 here means that the blocking member 7 can be completely located in the tube cavity of the third header 3, for example, the outer wall of the entire blocking member 7 is fixedly connected to the inner wall of the third header 3 by welding, so that the entire blocking member 7 is completely located in the tube cavity of the third header 3; in addition, the blocking member 7 can also be only partially located in the tube cavity of the third header 3, and the other part extends out of the tube cavity of the third header 3. For example, when the blocking member 7 is set in the third header 3 by plugging, the area of ​​the blocking member 7 needs to be slightly larger than the cross section of the third header 3 to ensure the stable cooperation between the blocking member 7 and the third header 3, that is, the blocking member 7 is partially located in the tube cavity of the third header 3.

[0054] The heat exchanger has an evaporation condition when working. In the evaporation condition, the length direction of the third header 3 is parallel to the gravity direction, the second pipe section 32 is located above the first pipe section 31, and the refrigerant enters from the first interface 5 and flows out from the second interface 6.

[0055] like Figure 6-8 As shown, the second aspect of the embodiment of the present application provides a vehicle refrigerator, which includes an inner tank 8 and a heat exchanger, the heat exchanger is the heat exchanger in the first aspect embodiment, the first header 1 and the second header 2 are respectively located on opposite sides of the inner tank 8, and the heat exchange tube 4 is attached to the outer wall of the inner tank 8. The vehicle refrigerator in this embodiment includes the heat exchanger in the first aspect embodiment, and since the heat exchanger in the first aspect embodiment has a more uniform and better heat exchange effect, the vehicle refrigerator also has a better cooling effect, and the cooling is more uniform.

[0056] In addition, the heat exchanger in the vehicle refrigerator also includes an inlet pressure plate connector and an outlet pressure plate connector, wherein the inlet pressure plate connector is connected to the first interface 5, and the outlet pressure plate connector is connected to the second interface 6, and then connected to the heat exchange system of the whole machine. In addition, the vehicle refrigerator also includes a compressor, a condenser, a throttling component and a thermostat, etc., because this article does not involve the improvement of these parts, so it will not be described in detail.

[0057] like Figure 6-8 As shown, in a specific embodiment, the heat exchange tube 4 includes a third curved section 43, and the third curved section 43 is located at one end of the heat exchange tube 4 close to the first header 1 and / or the second header 2. Specifically, the third curved section 43 gradually inclines toward the inner tank 8 from one side of the first header 1 or the second header 2 to one side of the third header 3. The third curved section 43 arranged on the heat exchange tube 4 can ensure the contact area between the heat exchange tube 4 and the inner tank 8, thereby improving the heat transfer between the heat exchange tube 4 and the inner tank 8.

[0058] like Figure 6-8 As shown, in a specific embodiment, a brazing material or a heat conductive adhesive is provided between at least one of the first header 1, the second header 2, the third header 3 and the heat exchange tube 4 and the outer wall of the inner tank 8, and the brazing material or the heat conductive adhesive connects the inner tank 8 and at least one of the first header 1, the second header 2, the third header 3 and the heat exchange tube 4. By connecting the heat exchanger and the inner tank 8 by brazing material or the heat conductive adhesive, the contact area between the two can be increased, thereby improving the heat transfer efficiency and further improving the heat exchange effect.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchanger, characterized in that: include: A first header (1) and a second header (2), wherein the first header (1) and the second header (2) are arranged at an interval; a third header (3), the third header (3) being arranged at intervals from the first header (1) and the second header (2), the third header (3) comprising a first pipe section (31) and a second pipe section (32); the third header (3) comprising a first interface (5) and a second interface (6), the first interface (5) being located in the first pipe section (31), and the second interface (6) being located in the second pipe section (32); A heat exchange tube (4), the heat exchange tube (4) comprising a plurality of first heat exchange tubes (41) and a plurality of second heat exchange tubes (42), the plurality of first heat exchange tubes (41) being connected to the first header (1) and the third header (3); and the plurality of second heat exchange tubes (42) being connected to the second header (2) and the third header (3).

2. The heat exchanger according to claim 1, characterized in that: The first heat exchange tube (41) comprises a first subsection (411), a second subsection (412) and a first bent section (413); the first bent section (413) is connected to the first subsection (411) and the second subsection (412); the first subsection (411) is connected to the first header (1); and the second subsection (412) is connected to the third header (3); And / or, the second heat exchange tube (42) comprises a third sub-segment (421), a fourth sub-segment (422) and a second bent segment (423), the second bent segment (423) being connected to the third sub-segment (421) and the fourth sub-segment (422), the third sub-segment (421) being connected to the second header (2), and the fourth sub-segment (422) being connected to the third header (3).

3. The heat exchanger according to claim 2, characterized in that: The length direction of the first subsection (411) or the third subsection (421) is defined as a first direction, and the third header (3) is located on the same side of the first header (1) and the second header (2) in the first direction.

4. The heat exchanger according to claim 2 or 3, characterized in that: The heat exchange tube (4) has a plurality of channels (44), and the plurality of channels (44) are arranged at intervals along the width direction of the heat exchange tube (4); The width of the heat exchange tube (4) is defined as a, the thickness of the heat exchange tube (4) is defined as b, the width of the channel (44) is defined as f, the height of the channel (44) is defined as h, the number of the channels (44) in one heat exchange tube (4) is defined as n, and the bending radius of the first bending section (413) and / or the second bending section (423) is defined as x, then x satisfies: 0.03≤(ab-fhn) / (0.785*x²)≤0.

79.

5. The heat exchanger according to claim 4, characterized in that: The number n of the channels (44) in a heat exchange tube (4) and the width a of the heat exchange tube (4), the width f of the channels (44), and the bending radius x of the first bending section (413) and / or the second bending section (423) satisfy the following relationship: 0.014≤(a-fn) / (n+1) / x≤0.

07.

6. The heat exchanger according to claim 2, 3 or 5, characterized in that: The heat exchange tube (4) comprises a necked section (45), the necked section (45) being located at one end of the second sub-segment (412) away from the first curved section (413), and / or the necked section (45) being located at one end of the fourth sub-segment (422) away from the second curved section (423), and the cross-sectional area of ​​the necked section (45) being smaller than the cross-sectional area of ​​the second sub-segment (412) or the fourth sub-segment (422); the length of the necked section (45) is defined as d, and the inner cavity length of the third header (3) in the second direction is defined as j, then: 1.2≤j / 2d≤2.4, and the second direction is the length direction of the second sub-segment (412) or the fourth sub-segment (422).

7. The heat exchanger according to claim 6, characterized in that The heat exchange tube (4) further comprises a transition section (46), wherein the transition section (46) connects the second sub-section (412) and the necking section (45), and / or the transition section (46) connects the fourth sub-section (422) and the necking section (45), and the width of the transition section (46) decreases linearly in a direction from the second sub-section (412) or the fourth sub-section (422) to the necking section (45), and an angle between the transition section (46) and the second sub-section (412) or the fourth sub-section (422) is defined as α, and 30°≤α<90°.

8. The heat exchanger according to claim 6, characterized in that The cross-sectional radius of the first header (1) or the second header (2) is defined as r, and the relationship between r and the inner cavity length j of the third header (3) in the second direction satisfies: 0.6≤2πr² / j²≤1.

3.

9. The heat exchanger according to any one of claims 1-3 or 7-8, characterized in that: The heat exchanger further comprises a barrier (7), wherein the barrier (7) is at least partially located on the third header (3), and the first pipe section (31) and the second pipe section (32) are respectively located on both sides of the barrier (7); Or the number of the blocking members (7) is plural, and the plural blocking members (7) are respectively located on the first header (1), the second header (2) and the third header (3); When the heat exchanger is in operation, the first interface (5) is a refrigerant inlet, and the second interface (6) is a refrigerant outlet.

10. A vehicle refrigerator, characterized in that: The vehicle refrigerator comprises an inner tank (8) and a heat exchanger, wherein the heat exchanger is a heat exchanger according to any one of claims 1 to 9, wherein the first header (1) and the second header (2) are respectively located on opposite sides of the inner tank (8), and the heat exchange tube (4) is attached to the outer wall of the inner tank (8).

11. The vehicle refrigerator according to claim 10, characterized in that: The heat exchange tube (4) comprises a third bent section (43), and the third bent section (43) is located at one end of the heat exchange tube (4) close to the first header (1) and / or the second header (2).

12. The vehicle refrigerator according to claim 10 or 11, characterized in that: A solder or a heat-conducting adhesive is provided between the outer wall of the inner liner (8) and at least one of the first header (1), the second header (2), the third header (3) and the heat exchange tube (4); the solder or the heat-conducting adhesive connects the inner liner (8) and at least one of the first header (1), the second header (2), the third header (3) and the heat exchange tube (4).

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