CN222635278U

CN222635278U - Heat exchanger and vehicle-mounted refrigerator

Info

Publication number: CN222635278U
Application number: CN202420539896.XU
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Current assignee: Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Priority date: 2024-03-19
Filing date: 2024-03-19
Publication date: 2025-03-18
Anticipated expiration: 2034-03-19

Abstract

The present application relates to a heat exchanger and a vehicle refrigerator, the heat exchanger comprising a first header, a second header, a third header, a heat exchange tube, a first interface and a second interface, the first header and the second header are arranged at intervals; the third header and the first header and the second header are arranged at intervals, the third header comprises a first pipe section and a second pipe section, the first pipe section and the second pipe section are arranged along the length direction of the third header; the heat exchange tube comprises a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, the plurality of first heat exchange tubes are connected to the first header and the third header; the plurality of second heat exchange tubes are connected to the second header and the third header; the first interface is located in the first pipe section, and the second interface is located in the second pipe section; the heat exchanger has a more uniform heat exchange effect when working.

Description

Heat exchanger and vehicle-mounted refrigerator

Technical Field

The application relates to the technical field of heat exchange, in particular to a heat exchanger and a vehicle-mounted refrigerator.

Background

With the development of electric automobile markets, some high-end car models are provided with vehicle-mounted refrigerators on the car, the volume of the vehicle-mounted refrigerators is smaller, and the heat exchanger with smaller volume is correspondingly required to meet the heat exchange requirement of the vehicle-mounted refrigerators. In the related art, a heat exchanger of a vehicle-mounted refrigerator mostly comprises two collecting pipes and heat exchange pipes arranged between the two collecting pipes, when the heat exchanger operates, refrigerant flows in a plurality of flows of a single flow path between the two collecting pipes to realize heat exchange, but because the volume of the heat exchanger is smaller, the filling quantity of the refrigerant is less, the heat exchange effect of the refrigerant in the rear part flow path of the heat exchanger is obviously reduced due to a flow mode of the single flow path and the plurality of flows, the heat exchange of the front part flow path and the rear part flow path of the heat exchanger is uneven, and the refrigerating effect of the vehicle-mounted refrigerator is influenced.

Disclosure of utility model

The first aspect of the present application provides a heat exchanger which has a more uniform heat exchange effect in operation.

The heat exchanger provided by the first aspect of the application comprises a first header and a second header, wherein the first header and the second header are arranged at intervals;

A third header spaced from the first header and the second header, the third header including a first tube segment and a second tube segment, the third header further including a first interface and a second interface, the first interface being located in the first tube segment and the second interface being located in the second tube segment;

The heat exchange tubes comprise a plurality of first heat exchange tubes and a plurality of second heat exchange tubes, the plurality of first heat exchange tubes are communicated with the first header and the third header, and the plurality of second heat exchange tubes are communicated with the second header and the third header.

The beneficial effects of the application are as follows:

When the heat exchanger of the application actually works, the refrigerant can enter the first pipe section from the first connector, then is split in the first pipe section, one part of the refrigerant can enter the first header through the first heat exchange pipe, flows to the second pipe section through the communicated first heat exchange pipe after the first header is converged, and the other part of the refrigerant can enter the second header through the second heat exchange pipe, and flows to the second pipe section through the communicated second heat exchange pipe after the second header is converged. In the flowing process, the refrigerant is divided into two paths in the first pipe section and flows for heat exchange respectively, so that the flow path of the refrigerant when flowing in the heat exchanger is shortened, and the heat exchange effect of the heat exchanger is more uniform.

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

The vehicle-mounted refrigerator provided by the second aspect of the application comprises an inner container and a heat exchanger, wherein the heat exchanger is the heat exchanger in the embodiment of the first aspect, the first collecting pipe and the second collecting pipe are respectively positioned on opposite sides of the inner container, and the heat exchange pipe is attached to the outer wall of the inner container.

The beneficial effects of the application are as follows:

the vehicle-mounted refrigerator comprises the heat exchanger in the embodiment of the first aspect, and the heat exchanger in the embodiment of the first aspect has more uniform heat exchange effect, so that the vehicle-mounted refrigerator also has more uniform refrigeration effect correspondingly.

Drawings

FIG. 1 is a schematic view of the overall structure of a heat exchanger according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of the A-direction of FIG. 1;

FIG. 3 is a schematic view of the B-direction structure of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a heat exchange tube according to one embodiment of the present application;

FIG. 5 is a schematic view of a heat exchange tube according to the present application;

Fig. 6 is a schematic perspective view of a liner and a heat exchanger of the vehicle-mounted refrigerator provided by the application;

FIG. 7 is a schematic side elevational view of one side of FIG. 6;

Fig. 8 is a schematic side view of one side of fig. 6.

Reference numerals are first header 1, second header 2, third header 3, first tube segment 31, second tube segment 32, heat exchange tube 4, first heat exchange tube 41, first sub-segment 411, second sub-segment 412, first curved segment 413, second heat exchange tube 42, third sub-segment 421, fourth sub-segment 422, second curved segment 423, third curved segment 43, channel 44, necking segment 45, transition segment 46, first interface 5, second interface 6, barrier 7, and liner 8.

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

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely an association relationship describing the associated object, and means that there may be three relationships, e.g., a and/or B, and that there may be three cases where a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

With the development of electric automobile markets, some high-end car-type disputes are equipped with on-vehicle refrigerators on the cars. Electric vehicles are generally equipped with a high-capacity battery and an efficient energy management system, can continuously provide power for the vehicle-mounted refrigerator, and because the power of the vehicle-mounted refrigerator is relatively low, the consumed electric quantity is very small for the total electric quantity of the vehicle, and the continuous voyage mileage of the vehicle is hardly affected. In addition, the new energy automobile can supply power for the vehicle-mounted refrigerator through the power battery under the parking state, so that the long-time uninterrupted refrigeration or heat preservation function is realized. With the development of the intellectualization of the electric automobile, the vehicle-mounted refrigerator can be better integrated with the whole automobile system, the functions of remote control, temperature setting and the like are realized, and the vehicle-mounted refrigerator becomes a part of the in-vehicle ecological system and is expected to become the standard configuration of the electric automobile.

At present, a vehicle-mounted refrigerator mainly comprises a semiconductor refrigerator and a compressor refrigerator, wherein the semiconductor vehicle-mounted refrigerator has weak refrigerating capacity, cannot achieve a low-temperature freezing effect in a high-temperature environment, is high in maintenance cost, does not have a stable heating function, has a short service life and other obvious short plates, and does not have the condition of large-area popularization on an electric automobile. Therefore, an economical, compact and reliable compressor-mounted refrigerator is still a relatively clear development direction of the on-board refrigerator.

As shown in fig. 1 to 5, the first aspect of the embodiment of the present application provides a heat exchanger, which can be used as an important component in a vehicle-mounted refrigerator, and is better adapted to the vehicle-mounted refrigerator, and the technical scheme and the technical effect are described herein by taking the application of the heat exchanger in the vehicle-mounted refrigerator as an example, and of course, the application field of the heat exchanger in the embodiment of the present application is not limited to the description herein, and can also be used in other systems, such as a water heater, a domestic air conditioner, a domestic refrigerator, and other refrigeration systems.

As shown in fig. 1 to 5, the heat exchanger provided in the first aspect of the embodiment of the present application mainly comprises a first header 1, a second header 2, a third header 3, heat exchange tubes 4, a first port 5 and a second port 6. Specifically, the first header 1 and the second header 2 are arranged at intervals, the third header 3 and the first header 1 and the second header 2 are arranged at intervals, the third header 3 comprises a first pipe section 31 and a second pipe section 32, 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 pipe 4 comprises a plurality of first heat exchange pipes 41 and a plurality of second heat exchange pipes 42, the plurality of first heat exchange pipes 41 are communicated with the first header 1 and the third header 3, the plurality of second heat exchange pipes 42 are communicated with the second header 2 and the third header 3, the first interface 5 is positioned on the first pipe section 31, the second interface 6 is positioned on the second pipe section 32, and the first interface 5 and the second interface 6 are inlets and outlets of refrigerant during the working process of the heat exchanger.

In this embodiment, the first header 1, the second header 2 and the third header 3 are all arranged at intervals, i.e. there is a certain interval between the first header 1, the second header 2 and the third header 3, and the distance and the position of the interval mainly depend on the overall size and shape of the heat exchanger. For example, in the present embodiment, the first header 1, the second header 2, the third header 3 and the heat exchange tubes 4 are substantially U-shaped after the connection is completed, the first header 1, the second header 2, the third header 3 and the heat exchange tubes 4 are fixedly connected by brazing, the first header 1 and the second header 2 are respectively located at both 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 substantially in parallel, but in some other embodiments, the first header 1, the second header 2 may be inclined with respect to the third header 3 in order to adapt to the installation environment or in some other working condition, which is not particularly limited herein.

The first tube segment 31 and the second tube segment 32 of the third header 3 are isolated from each other, and reference herein to isolated from each other means that the first tube segment 31 and the second tube segment 32 are not in communication with each other, i.e., the refrigerant in the first tube segment 31 and the second tube segment 32 cannot flow to each other without the other communicating members communicating both. The first tube section 31 and the second tube section 32 may be formed by welding two tubes or may be formed by dividing one tube, as will be described in the following embodiments. In addition, the lengths of the first pipe section 31 and the second pipe section 32 may be set according to actual requirements, for example, when the second pipe section 32 needs to be divided into more independent cavities to make the heat exchanger have more flows, the length of the first pipe section 31 may be reduced, but in general, when the heat exchanger is applied to a vehicle-mounted refrigerator, because the overall volume of the vehicle-mounted refrigerator is smaller, the volume of the corresponding heat exchanger is smaller, so that the first pipe section 31 and the second pipe section 32 do not need to be divided into too many flows.

As shown in fig. 3, in the present embodiment, the cross-sectional shape of the third header 3 is substantially rectangular, so that the third header 3 can be more favorably bonded to the outer wall of the heat-exchanged member, and the connection between the heat exchange tubes 4 on both sides and the third header 3 is facilitated, and the cross-sectional shapes of the first header 1 and the second header 2 may be circular, rectangular, or other shapes. In addition, the flow cross section area of the third header 3 is larger than the flow cross sections of the first header 1 and the second header 2, so that the refrigerant flow in the third header 3 can be increased, and the split refrigerant flow can be ensured to better meet the heat exchange requirement. It should be noted that the cross-sectional shapes of the first header 1, the second header 2, and the third header 3 may be other shapes, for example, polygonal shapes, irregular shapes according to the installation environment, or the like, which will not be described in detail herein.

In operation of the heat exchanger of this embodiment, refrigerant enters the first tube segment 31 from the first junction 5, is then split in the first tube segment 31, and a portion of the refrigerant enters the first header 1 through the first heat exchange tubes 41, flows to the second tube segment 32 through the first heat exchange tubes 41 that are in communication after the first header 1 merges, and another portion of the refrigerant enters the second header 2 through the second heat exchange tubes 42, flows to the second tube segment 32 through the second heat exchange tubes 42 that are in communication after the second header 2 merges, and then flows out from the second junction 6. In such a flow process, the refrigerant is divided into two paths in the first pipe section 31 and flows to exchange heat respectively, so that the flow path required by the refrigerant flowing in the heat exchanger is shortened, and the heat exchange effect of the heat exchanger is more uniform.

It should be noted that, the flow path of the refrigerant is increased by the way of the third header 3 for shunting heat exchange, so that the filling amount of the refrigerant can be properly increased, the heat exchange efficiency of the heat exchanger is improved, the heat exchange performance of the heat exchanger with small volume is greatly improved, and the vehicle-mounted refrigerator can have better refrigerating effect when the heat exchanger is applied to the vehicle-mounted refrigerator.

As shown in fig. 3, in one embodiment, the first heat exchange tube 41 includes a first sub-segment 411, a second sub-segment 412, and a first bent segment 413, the first bent segment 413 communicates with the first sub-segment 411 and the second sub-segment 412, the first sub-segment 411 communicates with the first header 1, the second sub-segment 412 communicates with 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 bent segment 423, the second bent segment 423 communicates with the third sub-segment 421 and the fourth sub-segment 422, the third sub-segment 421 communicates with the second header 2, and the fourth sub-segment 422 communicates with the third header 3. As defined the length direction of the first sub-section 411 or the third sub-section 421 is 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.

In the present embodiment, the first sub-section 411, the second sub-section 412 and the first curved section 413 are combined to form the first heat exchange tube 41, and in general, the first sub-section 411, the second sub-section 412 and the first curved section 413 are formed by bending an entire first heat exchange tube 41. The lengths of the first sub-section 411 and the second sub-section 412 may be preset according to actual installation dimensions, for example, according to different dimensions of the vehicle-mounted refrigerator, the length of the first sub-section 411 may be greater than the length of the second sub-section 412, and of course may be less than or equal to the length of the second sub-section 412, which is not specifically limited herein.

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, and the third sub-segment 421, the fourth sub-segment 422, and the second curved segment 423 may be formed by bending a single first heat exchange tube 41. Similarly, the length of the device can be preset and adjusted according to actual requirements. The dimensions of the first heat exchange tube 41 and the second heat exchange tube 42 may be the same or different, and generally, when the heat exchanger is applied to a vehicle-mounted refrigerator, the dimensions and the structures of the first heat exchange tube 41 and the second heat exchange tube 42 are the same.

As shown in FIG. 4, in one embodiment, the heat exchange tube 4 has a plurality of channels 44, the plurality of channels 44 are arranged at intervals along the width direction of the heat exchange tube 4, and 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 channels 44 is defined as f, the height of the channels 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 or the second bending section 423 is defined as x, x satisfies that 0.03.ltoreq (ab-fhn)/(0.785 x 2). Ltoreq.0.79.

In this embodiment, the heat exchange tube 4 is a micro-channel flat tube (i.e. the first heat exchange tube 41 and the second heat exchange tube 42 are all micro-channel flat tubes), and is approximately flat, and the flow heat exchange manner of the channels 44 helps to improve the distribution uniformity of the refrigerant in the heat exchange process, avoid local overheating or supercooling, and the micro-channel structure has a higher heat exchange area and volume ratio, so that a larger heat exchange effect can be realized in a smaller space, and accords with the trend of compactification and light weight of the vehicle-mounted electric appliance of the electric automobile.

In addition, taking the first heat exchange tube 41 as an example, since the first heat exchange tube 41 has the first curved section 413, and the angle between the first sub-section 411 and the second sub-section 412 is approximately 90 ° to adapt to the shape of the vehicle refrigerator, the first curved section 413 needs to have a certain bending radius to avoid that the bending causes the flow cross-sectional area of the channel 44 at the first curved section 413 to be too small to affect the flow of the refrigerant. The bending radius of the first bending section 413 mainly depends on the ratio of the channel 44 to the first heat exchange tube 41, if the flow cross-sectional area of the channel 44 is larger, the wall portion of the first heat exchange tube 41 is correspondingly thinner if the flow cross-sectional area of the channel 44 is larger, the condition that exposed ribs or the internal channel 44 is seriously deformed during bending is easier to occur, and the flow of the refrigerant is influenced, but when the flow cross-sectional area of the channel 44 is smaller or the quantity of the channel 44 is smaller, the wall portion of the first heat exchange tube 41 is correspondingly thicker if the flow cross-sectional area of the first heat exchange tube 41 is smaller, and the heat exchange is influenced if the flow cross-sectional area of the channel 44 is too heavy, and in addition, the manufacturing cost is increased, the performance of the heat exchanger is reduced, and the refrigerating effect of the vehicle-mounted refrigerator is poor. Therefore, the effect is better when the above parameters are satisfied that 0.03.ltoreq.ab-fhn)/(0.785 x 2). Ltoreq.0.79.

Similarly, the second curved section 423 of the second heat exchange tube 42 may be similarly bent, so that the second curved section 423 of the second heat exchange tube 42 has better effect when meeting the above parameter conditions, which is not described herein in detail.

After the product sizes of the heat exchange tubes 4 (the first heat exchange tube 41 and the second heat exchange tube 42) are shaped, 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 which can be obtained through calculation, so that the bending radius interval of the heat exchange tube with the model is only determined according to a preset range and then applied to different scenes, or the model of the adapted heat exchange tube 4 is calculated according to the bending radius x of the bending section.

As shown in FIG. 4, in one embodiment, the number n of channels 44 within a heat exchange tube 4 is 0.014.ltoreq.a-fn/(n+1)/x.ltoreq.0.07 with the width a of the heat exchange tube 4, the width f of the channels 44, the bending radius x of the first bending section 413 and/or the second bending section 423. If the ratio is less than 0.014, the heat exchange tube 4 may have exposed ribs and deformed internal flow channels after bending, and if the ratio is greater than 0.07, the product is too heavy and the flat tube flow area is too small, so that the refrigerant flow at the bending section 413 can be ensured when the ratio is kept in a certain interval.

As shown in fig. 5, in one embodiment, the heat exchange tube 4 includes a reduced mouth section 45, the reduced mouth section 45 being located at an end of the second sub-section 412 remote from the curved section 413, and/or the reduced mouth section 45 being located at an end of the fourth sub-section 422 remote from the second curved section 423,

The cross-sectional area of the necking segment 45 is smaller than that of the second subsection 412 or the fourth subsection 422, and if the length of the necking segment 45 is defined as d and the length of the inner cavity of the third header 3 in the second direction is defined as j, j/2d is not less than 1.2 and not more than 2.4, the second direction is the length direction of the second subsection 412 or the fourth subsection 422.

Also taking the first heat exchange tube 41 of the heat exchange tubes 4 as an example, the depth of insertion of the first heat exchange tube 41 into the third header 3 can be better controlled by providing the reduced-diameter section 45. Since the first heat exchange tube 41 and the second heat exchange tube 42 are inserted into both sides of the third header 3 and are connected to the first header 1 and the second header 2, respectively, i.e., the third header 3 is inserted with two heat exchange tubes 4 at the same height, the insertion depth of the heat exchange tubes 4 is particularly important for the distribution of the third header 3, and if the insertion depth is too deep, the remaining space between the two heat exchange tubes 4 is too small, which affects the distribution of the refrigerant. The necking section 45 can intuitively regulate and control the insertion depth of the first heat exchange tube 41, and generally, a certain difference exists between the inner cavity length j of the third header 3 in the second direction and the necking section length d, namely, 1.2 j/2d is less than or equal to 2.4 in the embodiment.

If the ratio between the length j of the inner cavity of the third header 3 in the second direction and the length d of the reduced section is less than 1.2, uneven flow distribution inside the heat exchanger and even failure of the refrigerant to enter the flow passage may be caused, and the heat exchanger performance is reduced, and if it is more than 2.4, the flow passage may be caused to be blocked by the solder entering the flow passage along the heat exchange tube 4. In addition, a reduced diameter section 45 may also be provided at the end of the first subsection 411 remote from the first curved section 413 to control the depth of insertion of the first heat exchange tube 41 into the first header 1. In the same manner, the second heat exchange tube 42 may be laid out and designed in the same structure as the first heat exchange tube 41, and the first heat exchange tube 41 and the second heat exchange tube 42 may have the same structure, so that the description thereof will not be repeated herein.

In a specific embodiment, as shown in fig. 5, the heat exchange tube 4 further includes a transition section 46, where the transition section 46 connects the second sub-section 412 and the necking section 45, and/or where the transition section 46 connects the fourth sub-section 422 and the necking section 45, the width of the transition section 46 decreases linearly from the second sub-section 412 or the fourth sub-section 422 to the necking section 45, that is, the side edge of the transition section is a slope gradually decreasing from the second sub-section 412 to the necking section 45, where the included angle between the transition section 46 and the second sub-section 412, or the included angle between the transition section 46 and the fourth sub-section 422 is α, is 30 ° +.. The transition section 46 can increase the contact area between the heat exchange tube 4 and the corresponding header, so that the heat exchanger can be connected more stably and firmly after brazing.

In a specific embodiment, if the radius of the cross section of the first header 1 or the second header 2 is defined as r, then the ratio between r and the length j of the inner cavity of the third header 3 in the second direction is 0.6.ltoreq.2pi.r2/j2.ltoreq.1.3. As mentioned above, the refrigerant is first introduced into the third header 3 and then split into the heat exchange tubes 4 communicating with the first header 1 or the second header 2, respectively, so that the cross-sectional area of the third header 3 needs to be larger than that of the first header 1 or the second header 2, and when the ratio of the two is smaller than 0.6, the local resistance of the refrigerant in the system is increased, and if the ratio is larger than 1.3, the unnecessary refrigerant charge amount is increased, which is not in line with the light weight and future environmental protection trend of the on-vehicle refrigerator.

In a specific embodiment, as shown in fig. 1-3, the heat exchanger further comprises a baffle 7, the baffle 7 being at least partially located in the third header 3, the first tube section 31 and the second tube section 32 being located on either side of the baffle 7, respectively, or the number of baffles 7 being plural, the plurality of baffles 7 being located in the first header 1, the second header 2 and the third header 3, respectively. The heat exchanger can be divided into a plurality of flows by the blocking member 7, but as mentioned above, the volume of the vehicle-mounted refrigerator is small, and if the flow is large, the refrigerant heat exchanging capacity of the latter half of the flow is weak, so that in general, the whole heat exchanger is divided into 2 to 3 flows.

In this embodiment, the lumen of the third header 3 may be blocked by the blocking member 7 to form the first tube segment 31 and the second tube segment 32 that are blocked from each other, and the blocking member 7 may be a partition or a blocking block. It should be noted that at least part of the present invention means that the blocking member 7 may be completely located in the lumen of the third header 3, for example, the outer wall of the blocking member 7 is fixedly connected to the inner wall of the third header 3 by welding or the like, so that the entire portion of the blocking member 7 is completely located in the lumen of the third header 3, and further, the blocking member 7 may be located in the lumen of the third header 3 only partially, and the other portion extends out of the lumen of the third header 3, for example, when the blocking member 7 is disposed in the lumen of the third header 3 by plugging or the like, the area of the blocking member 7 needs to be slightly larger than the cross section of the third header 3, so that stable fit between the blocking member 7 and the third header 3 is ensured, that is, the blocking member 7 is located in the lumen of the third header 3 partially.

The heat exchanger has the evaporation operating mode during operation, and during the evaporation operating mode, the length direction of third collector 3 is parallel to gravity direction, and second pipe section 32 is located first pipe section 31 top, and the refrigerant gets into from first interface 5, flows out from second interface 6.

As shown in fig. 6 to 8, a second aspect of the embodiment of the present application provides a vehicle-mounted refrigerator, which includes an inner container 8 and a heat exchanger in the embodiment of the first aspect, where the first header 1 and the second header 2 are respectively located on opposite sides of the inner container 8, and the heat exchange tube 4 is attached to an outer wall of the inner container 8. The vehicle-mounted refrigerator in the embodiment comprises the heat exchanger in the embodiment of the first aspect, and the heat exchanger in the embodiment of the first aspect has a more uniform and better heat exchange effect, so that the vehicle-mounted refrigerator also has a better refrigerating effect and is more uniform in refrigeration.

In addition, the heat exchanger in the vehicle-mounted refrigerator further comprises an inlet pressing plate connector and an outlet pressing plate connector, wherein the inlet pressing plate connector is connected with the first connector 5, and the outlet pressing plate connector is connected with the second connector 6 and then connected into the whole machine heat exchange system. In addition, the in-vehicle refrigerator further includes a compressor, a condenser, a throttle assembly, a thermostat, and the like, and since improvements of such parts are not referred to herein, a description will not be given.

6-8, In one particular embodiment, the heat exchange tube 4 includes a third curved section 43, the third curved section 43 being located at an end of the heat exchange tube 4 adjacent the first header 1 and/or the second header 2. Specifically, the third curved section 43 gradually slopes from the side of the first header 1 or the second header 2 to the side of the third header 3 toward the inner container 8, and the contact area of the heat exchange tube 4 and the inner container 8 can be ensured by the third curved section 43 arranged on the heat exchange tube 4, thereby improving heat transfer between the heat exchange tube 4 and the inner container 8.

As shown in fig. 6 to 8, in a specific embodiment, a solder 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 tubes 4 and the outer wall of the inner container 8, and connects the inner container 8 and at least one of the first header 1, the second header 2, the third header 3, and the heat exchange tubes 4. The mode of connecting the heat exchanger and the inner container 8 through brazing filler metal or heat conducting glue can increase the contact area between the heat exchanger and the inner container, so that the heat transfer efficiency is improved, and the heat exchange effect is further improved.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heat exchanger, comprising:

A first header (1) and a second header (2), the first header (1) being spaced apart from the second header (2);

A third header (3), the third header (3) being spaced apart from the first header (1) and the second header (2), the third header (3) comprising a first tube section (31) and a second tube 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 tube section (31) and the second interface (6) being located in the second tube section (32);

The heat exchange tube (4) comprises a plurality of first heat exchange tubes (41) and a plurality of second heat exchange tubes (42), wherein the first heat exchange tubes (41) are communicated with the first header (1) and the third header (3), and the second heat exchange tubes (42) are communicated with the second header (2) and the third header (3).

2. The heat exchanger according to claim 1, wherein the first heat exchange tube (41) comprises a first sub-section (411), a second sub-section (412) and a first curved section (413), the first curved section (413) communicating the first sub-section (411) and the second sub-section (412), the first sub-section (411) communicating with the first header (1), the second sub-section (412) communicating with the third header (3);

And/or, the second heat exchange tube (42) comprises a third sub-section (421), a fourth sub-section (422) and a second bending section (423), the second bending section (423) is communicated with the third sub-section (421) and the fourth sub-section (422), the third sub-section (421) is communicated with the second header (2), and the fourth sub-section (422) is communicated with the third header (3).

3. The heat exchanger according to claim 2, wherein a length direction of the first sub-section (411) or the third sub-section (421) is defined as a first direction, the third header (3) being located on the same side of the first header (1) and the second header (2) in the first direction.

4. A heat exchanger according to claim 2 or 3, wherein the heat exchange tube (4) has a plurality of channels (44), the plurality of channels (44) being arranged at intervals in the width direction of the heat exchange tube (4);

Defining the width of the heat exchange tube (4) as a, the thickness of the heat exchange tube (4) as b, the width of the channel (44) as f, the height of the channel (44) as h, the number of the channels (44) in one heat exchange tube (4) as n, and the bending radius of the first bending section (413) and/or the second bending section (423) as x, wherein x is less than or equal to 0.03 and less than or equal to (ab-fhn)/(0.785 x 2) and less than or equal to 0.79.

5. The heat exchanger according to claim 4, wherein the number n of channels (44) in one heat exchange tube (4) is 0.014 +.a-fn)/(n+1)/x +.0.07 between the width a of the heat exchange tube (4), the width f of the channels (44), the bending radius x of the first bending section (413) and/or the second bending section (423).

6. The heat exchanger according to claim 2, 3 or 5, wherein the heat exchange tube (4) comprises a reduced mouth section (45), the reduced mouth section (45) being located at an end of a second sub-section (412) remote from the first curved section (413), and/or the reduced mouth section (45) being located at an end of the fourth sub-section (422) remote from the second curved section (423), the reduced mouth section (45) having a smaller cross-sectional area than the second sub-section (412) or the fourth sub-section (422), the reduced mouth section (45) having a length d, the third header (3) having an inner chamber length j in a second direction, 1.2 j/2d being less than 2.4, the second direction being the length of the second sub-section (412) or the fourth sub-section (422).

7. The heat exchanger according to claim 6, wherein the heat exchange tube (4) further comprises a transition section (46), the transition section (46) connecting the second sub-section (412) and the reduced mouth section (45), and/or the transition section (46) connecting the fourth sub-section (422) and the reduced mouth section (45), the width of the transition section (46) decreasing linearly from the second sub-section (412) or the fourth sub-section (422) to the reduced mouth section (45), defining an angle α between the transition section (46) and the second sub-section (412) or the fourth sub-section (422), then 30 ° - α <90 °.

8. The heat exchanger according to claim 6, wherein a cross-sectional radius r of the first header (1) or the second header (2) is defined, and r is satisfied with an inner chamber length j of the third header (3) in the second direction of 0.6.ltoreq.2ρr2/j2.ltoreq.1.3.

9. A heat exchanger according to any one of claims 1-3 or 7-8, further comprising a baffle (7), the baffle (7) being at least partially located in the third header (3), the first tube section (31) and the second tube section (32) being located on either side of the baffle (7), respectively;

Or the number of the blocking pieces (7) is a plurality, and the blocking pieces (7) are respectively positioned 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-mounted refrigerator, characterized in that the vehicle-mounted refrigerator comprises an inner container (8) and a heat exchanger, wherein the heat exchanger is a heat exchanger as claimed in any one of claims 1-9, the first header (1) and the second header (2) are respectively located on opposite sides of the inner container (8), and the heat exchange tube (4) is attached to the outer wall of the inner container (8).

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

12. The vehicle-mounted refrigerator according to claim 10 or 11, wherein a brazing filler metal 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 container (8), and the brazing filler metal or the heat conductive adhesive connects the inner container (8) and at least one of the first header (1), the second header (2), the third header (3) and the heat exchange tube (4).