Heat exchange core and heat exchanger

Abstract

The application provides a heat exchange core and a heat exchanger. The heat exchange core comprises a first header, a second header, a plurality of condensing pipes and a spacer. The first header and the second header are filled with a working medium. The plurality of condensing pipes are arranged in parallel and used for connecting the first header and the second header. The spacer is fixed between two adjacent condensing pipes and used for blocking the flow of fluid between the two adjacent condensing pipes along the length direction of the condensing pipes. The heat exchange core blocks the flow of fluid between the two adjacent condensing pipes along the length direction of the condensing pipes through the spacer, effectively isolates the upper region and the lower region, avoids the rain in the external air from flowing to the lower part through the gap between the adjacent condensing pipes, reduces the equipment failure rate and prolongs the service life of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation technology, in particular to a heat exchange core and a heat exchanger. BACKGROUND

[0002] Some devices, such as transformer photovoltaic inverters, etc., are often provided with a sealed shell to protect the internal key components. The sealed shell can prevent dust, moisture and other external factors from entering the device to affect the normal operation of the device or shorten the service life of the device. Higher requirements of the device, also filled with special fluid in the shell, to ensure the stable and reliable operation of the device.

[0003] These devices often generate heat when running, and the sealed shell makes it difficult for internal heat to dissipate to the outside, causing the air temperature in the shell to become higher and higher, which in turn affects the normal operation of the device and shortens the service life of the device. It is necessary to add a heat dissipation device to these devices to keep the air temperature in the shell within a certain range to avoid affecting the normal operation of the device.

[0004] In related solutions, a parallel flow heat exchanger is provided in the heat dissipation device, but the partition plates on both sides of the parallel flow heat exchanger can only be simply attached to the condensing pipes, and cannot exert excessive attachment force, otherwise the condensing pipes and fins will be deformed, making it difficult to reliably isolate the air between the upper and lower regions, and rainwater in the external air will flow into the lower region connected to the sealed shell, thereby causing device failure or shortening the service life of the device. SUMMARY

[0005] To solve the problem that the upper and lower regions in the heat dissipation device cannot be reliably isolated, the present application provides a heat exchange core and a heat exchanger that can effectively isolate the upper and lower regions and thereby reduce the device failure rate and extend the service life of the device.

[0006] A heat exchange core, comprising a first header, a second header, a plurality of condensing pipes and a spacer;

[0007] The first header and the second header;

[0008] A plurality of condensing pipes arranged side by side for connecting the first header and the second header; the condensing pipes are filled with a working fluid in the sealed space formed by connecting the first header and the second header;

[0009] The spacer is fixed between two adjacent condensing pipes to block the flow of fluid between the two adjacent condensing pipes along the length direction of the condensing pipes.

[0010] Further, the heat exchange core further comprises a first partition plate and a second partition plate;

[0011] The first partition plate and the second partition plate are fixed at two ends of the spacer, respectively, for blocking fluid from flowing through two ends of the spacer and two sides of the plurality of condensing tubes arranged side by side.

[0012] Further, the spacer comprises a first part and a second part fixed to each other;

[0013] The first part and the first partition plate are an integral structure processed from the same plate;

[0014] The second part and the second partition plate are an integral structure processed from the same plate.

[0015] The application further provides a heat exchanger comprising a shell, an upper baffle, a lower baffle and the heat exchange core of any one of the above;

[0016] The shell is provided with a first outer circulation air outlet and an outer circulation air inlet for communicating with external air, for internally mounting and fixing the heat exchange core;

[0017] The upper baffle is fixed to the inner wall of the shell and the first collecting pipe, for separating the first outer circulation air outlet and the outer circulation air inlet;

[0018] The lower baffle is fixed to the second collecting pipe, for making the space between the lower baffle inside the shell and the first partition plate communicate with the air outlet of the sealed box, and making the space between the lower baffle inside the shell and the second partition plate communicate with the air inlet of the sealed box.

[0019] Further, the heat exchanger further comprises an additional heat exchange core; the additional heat exchange core is fixed in the shell side by side with the heat exchange core, and the additional heat exchange core is located on the side of the heat exchange core away from the first outer circulation air outlet;

[0020] The additional heat exchange core comprises an additional first collecting pipe, an additional second collecting pipe, an additional condensing tube, an additional spacer, an additional first partition plate and an additional second partition plate;

[0021] The additional condensing tube has a plurality of and is arranged side by side, for communicating the additional first collecting pipe and the additional second collecting pipe;

[0022] The additional spacer is fixed between two adjacent additional condensing tubes, for blocking fluid from flowing through the two adjacent additional condensing tubes along the length direction of the additional condensing tube;

[0023] The additional first partition plate and the additional second partition plate are fixed at two ends of the plurality of additional spacers, respectively, for blocking fluid from flowing through two ends of the additional spacer and two sides of the plurality of additional condensing tubes arranged side by side;

[0024] The second partition is fixedly connected with the added first partition to block the up-and-down flow of fluid between the heat exchange core and the added heat exchange core.

[0025] Further, the heat exchanger further comprises a half partition, an added upper baffle and an added lower baffle.

[0026] The half partition is fixed to the side of the added heat exchange core away from the heat exchange core, below the added second partition, for separating the air inlet of the closed box body from the air outlet of the closed box body; the space between the half partition and the added second partition is used for connecting the air inlet of the closed box body.

[0027] The added upper baffle is fixed to the added first header for separating the external circulation air inlet from the second external circulation air outlet on the shell; the space between the added upper baffle and the added second partition is connected to the second external circulation air outlet.

[0028] The added lower baffle is fixedly connected with the lower baffle and the added second header for separating the air outlet of the closed box body from the space between the heat exchange core and the added heat exchange core.

[0029] Further, the heat exchanger further comprises an added upper baffle, an added lower baffle and a damping plate.

[0030] The added upper baffle is fixed to the added first header for separating the external circulation air inlet from the second external circulation air outlet on the shell; the space between the added upper baffle and the added second partition is connected to the second external circulation air outlet.

[0031] The added lower baffle is fixed to the added second header for separating the air outlet of the closed box body from the air inlet of the closed box body; the space between the added lower baffle and the added second partition is used for connecting the air inlet of the closed box body.

[0032] The edge of the lower baffle away from the second header is fixedly connected with the added second header, and the lower baffle is provided with a through hole for allowing part of the fluid to enter the space between the heat exchange core and the added heat exchange core from the air outlet of the closed box body.

[0033] Further, the lower baffle and the added lower baffle are an integral structure.

[0034] Further, the heat exchanger further comprises a bolt fastener.

[0035] The second partition and the added first partition are an integral connecting partition.

[0036] The two side edges of the connecting partition plate are respectively bent downward into a bent edge capable of being fitted with the spacer and the additional spacer;

[0037] The bent edge is provided with a fixing hole corresponding to the mounting hole on the spacer and the mounting hole on the additional spacer respectively;

[0038] The bolt fastener is threaded through the fixing holes on the two side bent edges of the connecting partition plate, the mounting hole on the spacer and the mounting hole on the additional spacer, so as to fasten the heat exchange core, the connecting partition plate and the additional heat exchange core.

[0039] Further, the shell comprises a shell body and a rear cover;

[0040] The shell body is in a groove shape, and the first outer circulation air outlet is provided on the shell body;

[0041] The rear cover is fixed at the groove opening of the shell body, so that a space for mounting the heat exchange core is formed between the shell body and the rear cover; the rear cover is provided with an inner circulation air inlet and an inner circulation air outlet; the inner circulation air inlet is used for communicating with the air outlet of the sealed box body; and the inner circulation air outlet is used for communicating with the air inlet of the sealed box body;

[0042] The outer circulation air inlet is provided on the rear cover.

[0043] Further, the heat exchanger further comprises a first fan for promoting the flow of air from the outer circulation air inlet to the first outer circulation air outlet and a second fan for promoting the flow of fluid from the inner circulation air inlet to the inner circulation air outlet.

[0044] From the above technical solution, the present application has at least the following advantages and positive effects:

[0045] The present application provides a heat exchange core, by fixing a spacer between two adjacent condensing pipes, so that the spacer blocks the flow of fluid along the length direction of the condensing pipe between the two adjacent condensing pipes, thereby effectively isolating the upper region and the lower region, avoiding the rain in the external air flowing to the lower part through the gap between the adjacent condensing pipes, reducing the equipment failure rate and prolonging the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a schematic diagram of the heat exchange core in the related scheme.

[0047] Figure 2 is a partial front view structure schematic diagram of the fin fixed between the adjacent condensing pipes in the related scheme.

[0048] Figure 3is a disassembled structure diagram of a heat exchange core in an embodiment of the present application.

[0049] Figure 4 is a three-dimensional structure diagram of the heat exchange core after assembly in an embodiment of the present application.

[0050] Figure 5 and Figure 6 is a three-dimensional structure diagram of the spacer in two embodiments of the present application.

[0051] Figure 7 is a three-dimensional structure diagram of the arrangement of multiple spacers in the heat exchange core in an embodiment of the present application.

[0052] Figure 8 is Figure 7 is an enlarged structure diagram at A.

[0053] Figure 9 is a three-dimensional diagram of the comb plate structure in which the first spacer plate and the multiple first parts are made of the same metal plate in an embodiment of the present application.

[0054] Figure 10 is Figure 9 is a partial enlarged structure diagram of

[0055] Figure 11 is a disassembled structure diagram of the heat exchanger in which only one heat exchange core is arranged inside in an embodiment of the present application.

[0056] Figure 12 and Figure 13 is a three-dimensional structure diagram of the heat exchanger in which only one heat exchange core is arranged inside in an embodiment of the present application.

[0057] Figure 14 is a gas flow diagram in the working process of the heat exchanger in which only one heat exchange core is arranged inside in an embodiment of the present application.

[0058] Figure 15 is a gas flow diagram of the heat exchange of the gas in the sealed box by the heat exchanger in which only one heat exchange core is arranged inside in an embodiment of the present application.

[0059] Figure 16 is a three-dimensional structure diagram of the half spacer arranged on the additional heat exchange core in an embodiment of the present application.

[0060] Figure 17 is a three-dimensional structure diagram of the fixed connection of the heat exchange core and the additional heat exchange core with the half spacer in an embodiment of the present application.

[0061] Figure 18 is a disassembled three-dimensional structure diagram of the heat exchanger in which the heat exchange core, the half spacer and the additional heat exchange core are arranged in an embodiment of the present application.

[0062] Figure 19 Fig. 1 is a perspective view of a heat exchanger with heat exchange cores, half partitions and additional heat exchange cores according to an embodiment of the present application.

[0063] Figure 20 Fig. 2 is a schematic diagram of internal gas flow in a heat exchanger with heat exchange cores, half partitions and additional heat exchange cores during operation according to an embodiment of the present application.

[0064] Figure 21 Fig. 3 is a perspective view of a second collecting pipe of a heat exchange core and a second collecting pipe of an additional heat exchange core connected by a lower baffle with through holes according to an embodiment of the present application.

[0065] Figure 22 Fig. 4 is a schematic diagram of an integrated structure of a lower baffle with through holes and an additional lower baffle made by stamping and bending from the same sheet according to an embodiment of the present application.

[0066] Figure 23 Fig. 5 is a schematic diagram of a disassembled structure of a heat exchanger with heat exchange cores and additional heat exchange cores and a lower baffle with through holes according to an embodiment of the present application.

[0067] Figure 24 Fig. 6 is a schematic diagram of internal gas flow in a heat exchanger with heat exchange cores and additional heat exchange cores and a lower baffle with through holes during operation according to an embodiment of the present application.

[0068] Figure 25 Fig. 7 is a schematic diagram of a structure in which heat exchange cores and additional heat exchange cores are fixedly connected by an integrated connecting partition according to an embodiment of the present application.

[0069] Figure 26 Fig. 8 is a schematic diagram of a heat exchanger with heat exchange cores and additional heat exchange cores according to an embodiment of the present application. Figure 25 Fig. 9 is an enlarged structural schematic diagram at B.

[0070] The reference signs are explained as follows:

[0071] 1. first collecting pipe;

[0072] 2. second collecting pipe;

[0073] 3. condensing pipe;

[0074] 4. spacer; 41. mounting hole; 42. first part;

[0075] 5. first partition;

[0076] 6. second partition;

[0077] 7, shell; 71, shell main body; 711, front plate; 7111, first outer circulation air outlet; 712, left side plate; 7121, second outer circulation air outlet; 713, right side plate; 72, back cover; 721, outer circulation air inlet; 722, inner circulation air inlet; 723, inner circulation air outlet;

[0078] 8, upper baffle;

[0079] 9, lower baffle;

[0080] 10, closed box;

[0081] 11, additional upper baffle;

[0082] 12, additional lower baffle;

[0083] 13, half partition;

[0084] 14, additional first flow collecting pipe;

[0085] 15, additional second flow collecting pipe;

[0086] 16, additional condensing pipe;

[0087] 17, additional first partition;

[0088] 18, additional second partition;

[0089] 19, connecting partition;

[0090] 20, bolt fastener;

[0091] a, parallel flow heat exchanger; b, partition; c, fin; d, heat exchange core; e, additional heat exchange core. DETAILED DESCRIPTION

[0092] The typical embodiments embodying the features and advantages of the present application are described in detail herein. It should be appreciated that the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0093] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, which 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 indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0094] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection or electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0095] Referring to Figure 1 and Figure 2 , in the related scheme, a parallel flow heat exchanger a is arranged in the heat dissipation device as a heat exchange unit. However, the baffle b on both sides of the parallel flow heat exchanger a can only be simply attached to the condensing pipe 3, and excessive attachment force cannot be applied, otherwise the condensing pipe 3 and the fin c will be deformed, it is difficult to realize reliable air isolation between the upper and lower areas, and rainwater in the external air will flow to the lower area communicated with the closed shell, thereby causing equipment failure or shortening the service life of the equipment.

[0096] Referring to Figure 3 and Figure 4 , the heat exchange core provided by the embodiment of the present application comprises a first header pipe 1, a second header pipe 2, a plurality of condensing pipes 3, a spacer 4, a first baffle 5 and a second baffle 6.

[0097] After the heat exchange core is vacuumized, the working medium is filled, and the filling amount of the working medium is such that the liquid level of the working medium in the condensing pipe 3 is near the same height as the first baffle 5 and the second baffle 6.

[0098] The first header pipe 1 is located above the second header pipe 2. The first header pipe 1 and the second header pipe 2 are both arranged substantially horizontally.

[0099] The condensing pipe 3 is a flat pipe with multiple thin channels arranged in parallel inside.

[0100] Multiple condensing pipes 3 are arranged vertically in parallel, and the upper and lower ends of the condensing pipes 3 are respectively connected to the first and second collecting pipes 1 and 2. The working medium can flow between the first and second collecting pipes 1 and 2 through the channels in the condensing pipes 3.

[0101] Referring to Figure 5 , Figure 6 , Figure 7 and Figure 8 , the spacer 4 can be a block structure, a rectangular frame structure with a hollow middle, or other structure forms, and the spacer 4 can be made of aluminum metal material. One spacer 4 is fixed between every two adjacent condensing pipes 3, so as to avoid the flow of gas and rainwater between the two adjacent condensing pipes 3.

[0102] Mounting holes 41 are formed at the two ends of the spacer 4. The first and second partitions 5 and 6 can be fixed at the two ends of the spacer 4 through screws and the mounting holes 41 at the two ends of the spacer 4.

[0103] Multiple spacers 4 are arranged in parallel at the same height, so as to be fixed to the first and second partitions 5 and 6 at the same time.

[0104] The first partition 5 is fixed at one end of the multiple spacers 4 in the same direction, and is fixed to one side of the multiple condensing pipes 3 arranged vertically in parallel in the corresponding direction, so as to divide the side into two areas in which the fluid cannot flow up and down.

[0105] The first partition 5 and the spacer 4 can be detachably fixed through the screws and the mounting holes 41, or can be fixed by welding or adhesion.

[0106] The second partition 6 is fixed at the other end of the multiple spacers 4 in the same direction, and is fixed to one side of the multiple condensing pipes 3 arranged vertically in parallel in the corresponding direction, so as to divide the side into two areas in which the fluid cannot flow up and down.

[0107] The second partition 6 and the spacer 4 can be detachably fixed through the screws and the mounting holes 41, or can be fixed by welding or adhesion.

[0108] The fluid on the left and right sides of the vertically and parallelly arranged plurality of condensing tubes 3 can flow left and right through the gaps between adjacent condensing tubes 3 in the upper region of the first partition plate 5 and the second partition plate 6. The fluid on the left and right sides of the vertically and parallelly arranged plurality of condensing tubes 3 can also flow left and right through the gaps between adjacent condensing tubes 3 in the lower region of the first partition plate 5 and the second partition plate 6. Thus, the space around the vertically arranged plurality of condensing tubes 3 is divided into two regions in which the fluid can flow left and right but cannot flow up and down.

[0109] In some embodiments, one spacer 4 is formed by joining a first part 42 and a second part together. A plurality of spacers 4 are formed by joining a corresponding number of first parts 42 and second parts together.

[0110] With reference to Figure 9 and Figure 10 , the first part 42 and the first partition plate 5 are comb plate structures formed by shearing a rectangular metal plate, for example. The first part 42 is formed by shearing one side edge of the rectangular metal plate to form a plurality of parallel comb teeth.

[0111] The second part and the second partition plate 6 are comb plate structures formed by shearing a rectangular metal plate, for example. The second part is formed by shearing one side edge of the rectangular metal plate to form a plurality of parallel comb teeth.

[0112] The heat exchange core of the present application can be installed in a heat exchanger housing to form a heat exchanger for dissipating heat from the interior of an enclosed box through the air inlet and air outlet of the enclosed box. Even the lower half of the heat exchange core of the present application can be directly inserted into an opening formed in the enclosed box, so that the opening of the enclosed box is sealed to the spacer 4, and thus the upper half of the heat exchange core is located outside the enclosed box, while the lower half of the heat exchange core is located inside the enclosed box, so that the heat in the enclosed box is exchanged to the ambient air outside.

[0113] With reference to Figure 11 , Figure 12 and Figure 13 , the present application further provides a heat exchanger. The heat exchanger comprises a housing 7, an upper baffle 8, a lower baffle 9, and the heat exchange core d in the above embodiments.

[0114] The housing 7 comprises a housing body 71 and a rear cover 72. The rear cover 72 is arranged on the housing body 71, so that a receiving space for receiving and installing the heat exchange core d and other components is formed between the housing body 71 and the rear cover 72.

[0115] The shell body 71 is in the shape of a groove surrounded by a front plate 711, a left side plate 712, a right side plate 713, a top plate and a bottom plate. The front plate 711 is provided with a first outer circulation air outlet 7111 for discharging the air with heat after heat exchange.

[0116] The upper part of the back cover 72 is provided with an outer circulation air inlet 721 for serving as an inlet of the ambient air into the heat exchanger.

[0117] The lower part of the back cover 72 is provided with an inner circulation air inlet 722 for connecting the air outlet of the sealed box body, so as to pass the gas with higher temperature in the sealed box body into the heat exchanger.

[0118] The back cover 72 is also provided with an inner circulation air outlet 723 for connecting the air inlet of the sealed box body, so as to pass the gas with lower temperature after cooling into the sealed box body 10.

[0119] The inner circulation air outlet 723 is arranged above the inner circulation air inlet 722 and between the outer circulation air inlet 721 and the inner circulation air inlet 722.

[0120] In some embodiments, the shell 7 can only include the shell body 71. In use, the shell body 71 is directly fixed at the corresponding position on the sealed box body, and a part of the sealed box body 10 serves as the back cover 72, so that the back cover 72 does not need to be specially arranged.

[0121] For example, the shell body 71 is buckled and fixed on the side wall of the sealed box body 10, and a part of the shell body 71 above the opening is higher than the top of the sealed box body 10. The part of the shell body 71 above the opening of the sealed box body 10 serves as the outer circulation air inlet 721. The air outlet of the sealed box body 10 replaces the inner circulation air inlet 722 on the back cover 72, and the air inlet of the sealed box body 10 replaces the inner circulation air outlet 723 on the back cover 72.

[0122] One edge of the upper baffle 8 is fixed on the first header pipe 1 of the heat exchange core. The other edge of the upper baffle 8 is fixed on the inner side of the front plate 711 of the shell body 71 and above the first outer circulation air outlet 7111.

[0123] The edge of the first partition plate 5 away from the condenser pipe 3 is fixed below the first outer circulation air outlet 7111, so that the space between the upper baffle 8 and the first partition plate 5 is connected to the first outer circulation air outlet 7111.

[0124] The edge of the second partition plate 6 away from the condenser pipe 3 is fixed on the inner side of the back cover 72 and between the outer circulation air inlet 721 and the inner circulation air outlet 723, so that the space above the second partition plate 6 is connected to the outer circulation air inlet 721.

[0125] One edge of the lower baffle 9 is fixed to the second header pipe 2 of the heat exchange core. The other edge of the lower baffle 9 is fixed to the inner side of the rear cover 72 between the inner circulation air outlet 723 and the inner circulation air inlet 722, so that the space between the second baffle 6 and the lower baffle 9 is communicated with the inner circulation air outlet 723, and the space below the lower baffle 9 is communicated with the inner circulation air inlet.

[0126] With reference to Figure 14 and Figure 15 , in operation, the hot air in the sealed box 10 enters the shell 7 from the air outlet of the sealed box 10 and the inner circulation air inlet 722. Under the blocking and guiding of the lower baffle 9 and the first baffle 5, the hot air first reaches the lower region of the first baffle 5. Then, the hot air passes through the gaps between the plurality of condensing pipes 3 laterally and transfers heat to the liquid working medium in the condensing pipes 3 in the process of passing through the gaps between the plurality of condensing pipes 3, so that the working medium evaporates and rises to the upper segment of the condensing pipes 3. Thus, the hot air becomes cold air with lower temperature and reaches the region between the first baffle 5 and the lower baffle 9, and then enters the sealed box 10 through the inner circulation air outlet 723 and the air inlet of the sealed box 10, so as to achieve the purpose of reducing the temperature in the sealed box 10.

[0127] The external air enters from the outer circulation air inlet 721 and passes through the gaps between the condensing pipes 3 above the spacer 4. When the air passes through the gaps between the condensing pipes 3 above the spacer 4, the working medium evaporated and rising in the condensing pipes 3 exchanges heat with the air, and then transfers heat to the air. The air is heated and enters the region between the upper baffle 8 and the first baffle 5 and is finally discharged from the air outlet.

[0128] The working medium evaporated in the condensing pipes 3 and in the upper segment is condensed into liquid state after cooling, and flows back to the segment of the condensing pipes 3 below the spacer 4 under the action of gravity. Thus, the heat of the hot air discharged from the sealed box 10 is continuously transferred to the external air through evaporation and condensation, and the inside of the sealed box 10 is continuously cooled.

[0129] In some embodiments, in addition to the heat exchange core d, the upper baffle 8 and the lower baffle 9, the shell 7 is further provided with an additional heat exchange core e, an additional upper baffle 11, an additional lower baffle 12 and a half baffle 13, so as to improve the heat exchange efficiency.

[0130] With reference to Figure 16 and Figure 17 , the additional heat exchange core e includes an additional first header pipe 14, an additional second header pipe 15, an additional condensing pipe 16, an additional spacer, an additional first baffle 17 and an additional second baffle 18.

[0131] A second outer circulation air outlet 7121 is further formed in the left side plate 712 and the right side plate 713 of the shell body 71 near the rear cover 72.

[0132] The structure and working principle of the added heat exchange core e are basically the same as those of the heat exchange core d.

[0133] The plurality of added condensing pipes 16 are arranged side by side, and the upper and lower ends of each added condensing pipe 16 are respectively communicated with the added first header pipe 14 and the added second header pipe 15. The added spacer is fixed between the adjacent two added condensing pipes 16, so as to block the flow of fluid between the adjacent two added condensing pipes 16 along the length direction of the added condensing pipe 16. The added first baffle 17 and the added second baffle 18 are respectively fixed at the two ends of the plurality of added spacers, so as to block the flow of fluid from the two ends of the added spacer and the two sides of the plurality of added condensing pipes 16 arranged side by side.

[0134] The second baffle 6 is overlapped with the added first baffle 17 to block the flow of fluid between the heat exchange core and the added heat exchange core e in the up-down direction. The specific overlapping and fixing mode of the second baffle 6 and the added first baffle 17 can be that the edges of the second baffle 6 and the added first baffle 17 are fixed after being overlapped in the up-down direction, or the edges of the second baffle 6 and the added first baffle 17 are buckled in opposite directions after being overlapped.

[0135] The added lower baffle 12 is fixedly connected with the lower baffle 9 and the added second header pipe 15, so as to separate the space between the air outlet of the sealed box body 10 and the heat exchange core d and the added heat exchange core e, and avoid the fluid from entering between the heat exchange core d and the added heat exchange core e from the lower side.

[0136] The added lower baffle 12 and the lower baffle 9 are connected to form a "V" shape with a lower sharp and an upper wide cross section, so as to facilitate guiding the fluid to flow to both sides.

[0137] Referring to Figure 18 and Figure 19 The space between the half baffle 13 and the added second baffle 18 is communicated with the inner circulating air outlet 723 and the air inlet of the sealed box body 10, so as to return the gas with lower temperature after heat exchange to the sealed box body 10.

[0138] The half baffle 13 is fixed on the added spacer, located on the side of the added heat exchange core e away from the heat exchange core d, and below the added second baffle 18, for separating the air inlet (and the corresponding inner circulating air outlet 723) of the sealed box body 10 and the air outlet (and the corresponding inner circulating air inlet 722) of the sealed box body 10, so as to avoid the hot gas flowing out from the air outlet of the sealed box body 10 directly flowing back to the sealed box body 10 from the air inlet of the sealed box body 10 without being heat exchanged.

[0139] The added upper baffle 11 is fixed on the added first manifold 14. The added upper baffle 11 is used to separate the outer circulation air inlet 721 and the second outer circulation air outlet 7121 formed on the shell 7, so as to avoid the air flowing from the outer circulation air inlet 721 directly flowing out from the second outer circulation air outlet 7121 without heat exchange.

[0140] The space between the added upper baffle 11 and the added second baffle 18 is communicated with the second outer circulation air outlet 7121, so that the air heated after heat exchange flows out from the second outer circulation air outlet 7121.

[0141] Referring to Figure 20 , in operation, the hot air entering the air outlet of the closed box 10 and the inner circulation air inlet 722 is divided by the added lower baffle 12 and the lower baffle 9, and then enters the space surrounded by the condenser tube 3, the added condenser tube 16, the second baffle 6, the added first baffle 17, the lower baffle 9 and the added lower baffle 12 after heat exchange by the heat exchange core and the added heat exchange core e, and then enters the space between the added second baffle 18 and the half baffle 13 through the added heat exchange core e near the first added baffle, and finally the cooled air flows back to the closed box 10 through the inner circulation air outlet 723 and the air inlet of the closed box 10.

[0142] The air entering the outer circulation air inlet 721 enters the space between the condenser tube 3 above the second baffle 6 and the added condenser tube 16, and then is divided into two parts to flow in opposite directions through the gaps between the plurality of condenser tubes 3 and the gaps between the plurality of added condenser tubes 16 for heat exchange, and the air heated after heat exchange flows back to the outside air from the first outer circulation air outlet 7111 and the second outer circulation air outlet 7121 respectively.

[0143] In some embodiments, in addition to the heat exchange core, the upper baffle 8 and the lower baffle 9 arranged in the shell 7, the added heat exchange core e, the added upper baffle 11 and the added lower baffle 12 are also arranged to improve the heat exchange efficiency.

[0144] Referring to Figure 21 , the added heat exchange core e has the same structure as the added heat exchange core e in the above embodiment, the connection relationship between the second baffle 6 and the added first baffle 17 is the same as that in the above embodiment, the arrangement and connection relationship of the upper baffle 8 are the same as those in the above embodiment, and the arrangement and connection relationship of the added upper baffle 11 are the same as those in the above embodiment, which will not be described here.

[0145] Referring to Figure 22 , the two side edges of the lower baffle 9 are fixedly connected to the second manifold 2 and the added second manifold 15 respectively, and the lower baffle 9 is provided with a through hole. The through hole formed on the lower baffle 9 allows part of the fluid to enter between the heat exchange core and the added heat exchange core e from the air outlet of the closed box 10.

[0146] The lower baffle 9 is in a shape of a "V" with a lower tip and a higher top, so as to facilitate the diversion of the fluid to two sides respectively.

[0147] Referring to Figure 23 , one side edge of the added lower baffle 12 is fixed to the added second collecting pipe 15. The opposite side edge of the added lower baffle 12 is fixed to the inner side of the rear cover 72 between the inner circulation air inlet 722 and the inner circulation air outlet 723, so as to separate the inner circulation air inlet 722 and the inner circulation air outlet 723, and avoid the hot air entering from the air outlet of the closed box 10 and the inner circulation air inlet 722 directly flowing back to the closed box 10 from the inner circulation air outlet 723 and the air inlet of the closed box 10 without heat exchange.

[0148] The added lower baffle 12 and the lower baffle 9 can be a sheet metal part formed by one-piece stamping and bending of the same metal sheet.

[0149] Referring to Figure 24 , during operation, the hot air entering from the air outlet of the closed box 10 and the inner circulation air inlet 722 is introduced into the area between the condensing pipe 3 and the added condensing pipe 16 and the area between the condensing pipe 3 of the heat exchange core d and the front plate 711 of the shell body 71 by the lower baffle 9 with through holes.

[0150] The hot air flowing into the area between the condensing pipe 3 and the added condensing pipe 16, after transversely passing through the gaps between the plurality of added condensing pipes 16 in parallel, is introduced into the area between the added second partition plate 18 and the added lower baffle 12, and then flows back to the closed box 10 through the inner circulation air outlet 723 and the air inlet of the closed box 10.

[0151] The hot air flowing into the area between the condensing pipe 3 and the front plate 711, after transversely passing through the gaps between the plurality of condensing pipes 3 in parallel, is introduced into the area between the added second partition plate 18 and the added lower baffle 12 together with the hot air flowing into the area between the condensing pipe 3 and the added condensing pipe 16 from the through holes of the lower baffle 9, and then flows back to the closed box 10 through the inner circulation air outlet 723 and the air inlet of the closed box 10.

[0152] In some embodiments, the heat exchanger further comprises a first fan (not shown in the figure) for facilitating the flow of air from the outer circulation air inlet 721 to the first outer circulation air outlet 7111 and a second fan (not shown in the figure) for facilitating the flow of fluid from the inner circulation air inlet 722 to the inner circulation air outlet 723. The first fan and the second fan can be arranged inside the shell 7 or outside the shell 7.

[0153] Referring to Figure 25 and Figure 26In some embodiments, the second partition plate 6 and the additional first partition plate 17 can be made into an integrated connection partition plate 19. Alternatively, the connection partition plate 19 is a special form of the second partition plate 6, and the additional first partition plate 17 is omitted.

[0154] Specifically, the two side edges of the connection partition plate 19 can be bent downward to form a folded edge that can be attached to the spacer 4 and the additional spacer. The side of the first partition plate 5 attached to the spacer 4 and the side of the additional second partition plate 18 attached to the additional spacer also have corresponding folded edges. Corresponding fixing holes are formed in the two side folded edges of the connection partition plate 19 and the folded edges of the first partition plate 5 and the additional second partition plate 18.

[0155] The bolt fastener 20 includes a nut and a bolt with a nut at one end. The rod of the bolt is sequentially inserted into the fixing hole of the folded edge of the first partition plate 5, the mounting hole of the spacer 4, the fixing hole of the two side folded edges of the connection partition plate 19, the mounting hole of the additional spacer, and the fixing hole of the folded edge of the additional second partition plate 18 in one direction, and the nut is screwed on the rod of the bolt, so that the nut presses the additional second partition plate 18, and then the nut of the bolt presses the folded edge of the first partition plate 5 through tension.

[0156] The bolt fastener 20 can also include two or more nuts and a threaded rod with a threaded circumferential surface, so that the clamping and fixing can be achieved by screwing the nuts from the front side of the folded edge of the first partition plate 5 and the rear side of the folded edge of the additional second partition plate 18. The tension generated on the bolt fastener 20 after the nut is tightened causes the folded edge of the first partition plate 5, the folded edge of the additional second partition plate 18, the heat exchange core d, and the additional heat exchange core e to be clamped and fixed to the two sides of the connection partition plate 19.

[0157] In some embodiments, the lower baffle plate 9 with a through hole fixedly connected to the second manifold 2 and the additional second manifold 15 can also be designed as a flat plate structure flush with the additional lower baffle plate 12.

[0158] Although the present application has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive terms. Since the present application can be embodied in many different forms without departing from the spirit or essential characteristics thereof, it is understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be construed broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds, are therefore intended to be embraced by the appended claims.

Claims

1. A heat exchange core, characterized by, The application relates to a heat exchange core, which comprises a first collecting pipe and a second collecting pipe; a plurality of condensing pipes arranged in parallel and used for connecting the first collecting pipe and the second collecting pipe; a closed space formed by the condensing pipes connecting the first collecting pipe and the second collecting pipe, which is filled with working medium; a spacer fixed between two adjacent condensing pipes and used for preventing fluid from flowing between the two adjacent condensing pipes along the length direction of the condensing pipes; first and second partition plates fixed at the two ends of the spacer, which are detachably connected with the mounting holes on the spacer and are fixed on one side of the plurality of condensing pipes arranged vertically and in parallel, so that the condensing pipes are divided into two areas in which fluid cannot flow up and down. The application further relates to a heat exchange device, which comprises a shell, an upper baffle, a lower baffle and the heat exchange core. The shell is provided with a first external circulation air outlet and an external circulation air inlet for connecting external air, and the heat exchange core is fixed in the shell. The upper baffle is fixed on the inner wall of the first collecting pipe and the shell, and is used for separating the first external circulation air outlet and the external circulation air inlet. The lower baffle is fixed on the second collecting pipe, and is used for connecting the space between the lower baffle and the first partition plate in the shell with the air outlet of the closed box, and connecting the space between the lower baffle and the second partition plate in the shell with the air inlet of the closed box. The application further relates to an additional heat exchange core, which is fixed in the shell in parallel with the heat exchange core and is located on the side of the heat exchange core away from the first external circulation air outlet.

2. A heat exchanger, characterized by, The additional heat exchange core comprises an additional first collecting pipe, an additional second collecting pipe, additional condensing pipes, an additional spacer, an additional first partition plate and an additional second partition plate. The additional condensing pipes are arranged in parallel and are used for connecting the additional first collecting pipe and the additional second collecting pipe. The additional spacer is fixed between two adjacent additional condensing pipes and is used for preventing fluid from flowing between the two adjacent additional condensing pipes along the length direction of the additional condensing pipes. The additional first partition plate and the additional second partition plate are respectively fixed at the two ends of the additional spacer, and are used for preventing fluid from flowing from the two ends of the additional spacer and the two sides of the plurality of additional condensing pipes arranged in parallel.

3. The heat exchanger of claim 2, wherein The second partition plate is fixedly connected with the additional first partition plate, so as to prevent fluid from flowing up and down between the heat exchange core and the additional heat exchange core. The application further relates to a half partition plate, an additional upper baffle and an additional lower baffle. The half partition plate is fixed on the side of the additional heat exchange core away from the heat exchange core and is located below the additional second partition plate, and is used for separating the air inlet of the closed box and the air outlet of the closed box; the space between the half partition plate and the additional second partition plate is used for connecting the air inlet of the closed box. ​ ​ ​ 4. The heat exchanger of claim 3, wherein ​ ​ The added upper baffle is fixed on the added first collecting pipe, and is used for separating the outer circulation air inlet from a second outer circulation air outlet on the shell; and a space between the added upper baffle and the added second partition plate is communicated with the second outer circulation air outlet. The added lower baffle is fixedly connected with the lower baffle and the added second collecting pipe, and is used for separating the air outlet of the closed box from a space between the heat exchange core and the added heat exchange core.

5. The heat exchanger of claim 3, wherein The added upper baffle and the added lower baffle are further included. The added upper baffle is fixed on the added first collecting pipe, and is used for separating the outer circulation air inlet from a second outer circulation air outlet on the shell; and a space between the added upper baffle and the added second partition plate is communicated with the second outer circulation air outlet. The added lower baffle is fixed on the added second collecting pipe, and is used for separating the air outlet of the closed box from an air inlet of the closed box; and a space between the added lower baffle and the added second partition plate is used for communicating the air inlet of the closed box. The lower baffle is fixedly connected with the added second collecting pipe at an edge of the lower baffle away from the second collecting pipe; and a through hole is formed in the lower baffle, and is used for allowing part of fluid to enter the space between the heat exchange core and the added heat exchange core from the air outlet of the closed box.

6. The heat exchanger of claim 5, wherein, The lower baffle and the added lower baffle are in an integrated structure.

7. The heat exchanger of claim 3, wherein A bolt fastener is further included. The second partition plate and the added first partition plate are in an integrated connecting partition plate. Two side edges of the connecting partition plate are respectively bent downward to be folded edges capable of being fitted with the spacing body and the added spacing body. Fixed holes are formed in the folded edges, and correspond to the mounting holes of the spacing body and the added spacing body respectively. The bolt fastener is arranged in the fixed holes of the folded edges of the connecting partition plate, the mounting holes of the spacing body and the added spacing body, so as to fasten the heat exchange core, the connecting partition plate and the added heat exchange core.

8. The heat exchanger of claim 2, wherein, The shell includes a shell body and a rear cover. The shell body is in a groove shape, and the first outer circulation air outlet is formed in the shell body. The rear cover is fixed at a groove opening of the shell body, so that a space for arranging the heat exchange core is formed between the shell body and the rear cover; the rear cover is provided with an inner circulation air inlet and an inner circulation air outlet; the inner circulation air inlet is used for communicating the air outlet of the closed box; and the inner circulation air outlet is used for communicating the air inlet of the closed box. The outer circulation air inlet is formed in the rear cover.

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