Plate heat exchanger

Abstract

A plate heat exchanger comprises two end plates which are oppositely arranged in the set direction, at least two heat exchange plates are further arranged between the two end plates, the heat exchange plates, adjacent to the end plates, in the heat exchange plates are adjacent heat exchange plates, adjacent communicating holes are formed in the adjacent heat exchange plates, and heat exchange sub-channels are arranged between the adjacent heat exchange plates and the corresponding end plates. The adjacent communicating holes can communicate with the heat exchange sub-channels; a reinforcing part is arranged between at least one adjacent heat exchange plate and the corresponding end plate, the reinforcing part comprises an annular part, the annular part is arranged around the central axis of the adjacent communicating hole, the annular part comprises a base plate part and a concave plate part which are alternately arranged in the circumferential direction, the base plate part is connected with the adjacent heat exchange plate, and the concave plate part sinks towards the corresponding end plate relative to the base plate part; the concave plate parts are connected with the corresponding end plates, first communicating channels are defined by the concave plate parts and the adjacent heat exchange plates, the first communicating channels communicate with the corresponding heat exchange sub-channels, and the first communicating channels further communicate with the adjacent communicating holes. The damage risk of the plate heat exchanger is relatively low.

Description

[0001] The present application claims priority to the utility model patent application No. 202423143756X filed in the China Patent Office on December 19, 2024, and entitled "Plate Heat Exchanger". TECHNICAL FIELD

[0002] The utility model relates to heat exchanger technical field, concretely relates to a plate heat exchanger. BACKGROUND

[0003] Plate heat exchangers are widely used in refrigeration and heating systems due to their compact structure, high heat transfer coefficient, high reliability, and low refrigerant charge. Plate heat exchangers typically include two end plates and multiple heat exchange plates located between the two end plates. In normal use, the two end plates of the plate heat exchanger have relatively low pressure-bearing strength, which poses a risk of damage to the plate heat exchanger.

[0004] Therefore, how to provide a scheme to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a plate heat exchanger, at least one end plate of which has relatively high pressure-bearing strength, thereby reducing the risk of damage to the plate heat exchanger.

[0006] To solve the above technical problems, the utility model provides a plate heat exchanger, which includes two end plates arranged opposite to each other along a specified direction, at least two heat exchange plates arranged between the two end plates, each heat exchange plate arranged along the specified direction, and each heat exchange plate adjacent to the end plate being an adjacent heat exchange plate. The adjacent heat exchange plate is provided with an adjacent communication hole, and the adjacent heat exchange plate and the corresponding end plate include a heat exchange sub-channel, and the adjacent communication hole can communicate the heat exchange sub-channel. At least one adjacent heat exchange plate and the corresponding end plate are provided with a reinforcing component, the reinforcing component includes a ring-shaped part, the ring-shaped part is arranged around the central axis of the adjacent communication hole, the ring-shaped part includes a base plate part and a recessed plate part alternately arranged in the circumferential direction, the base plate part is connected to the adjacent heat exchange plate, the recessed plate part is recessed towards the corresponding end plate relative to the base plate part, the recessed plate part is connected to the corresponding end plate, a first communication channel is formed between the recessed plate part and the adjacent heat exchange plate, the first communication channel is connected to the corresponding heat exchange sub-channel, and the first communication channel is also connected to the adjacent communication hole.

[0007] In the above scheme, the utility model embodiment selects to set the reinforcing component between at least one adjacent heat exchange plate and corresponding end plate, the annular part of the reinforcing component can be arranged around the central axis of adjacent communication hole, and can be connected with corresponding adjacent heat exchange plate and end plate, to support end plate, so that the end plate can be reinforced, the risk of cracking and other forms of damage of end plate in use can be reduced, to facilitate prolonging the service life of plate heat exchanger.

[0008] And, the recessed plate part of the reinforcing component and the adjacent heat exchange plate also form a first communication channel, the first communication channel can be connected with the corresponding heat exchange subchannel and the adjacent communication hole, to reduce the influence on the internal conduction performance of the plate heat exchanger.

[0009] Optionally, the reinforcing component further comprises a convex plate part, the convex plate part is located on the inner side of the annular part, the convex plate part is connected with the annular part or is integrally formed, and the convex plate part protrudes from the end plate towards the corresponding adjacent heat exchange plate.

[0010] Optionally, the convex plate part is a spherical plate.

[0011] Optionally, the base plate part has a first connecting surface, at least part of the first connecting surface is connected with the adjacent heat exchange plate, in the set direction, the convex plate part comprises a first part protruding from the first connecting surface in a direction away from the corresponding end plate, the adjacent communication hole has a first projection area in the set direction corresponding to the end plate, the first part has a second projection area in the set direction corresponding to the end plate, the first projection area can cover the second projection area, and each section of the outer boundary of the first projection area and the outer boundary of the second projection area has a spacing.

[0012] Optionally, the convex plate part has a third projection area in the set direction corresponding to the end plate, and the first projection area can also cover the third projection area.

[0013] Optionally, in the set direction, the ratio of the size h1 of the convex plate part to the size h2 of the annular part is between 1.4 and 1.6.

[0014] Optionally, the convex plate part is provided with at least one opening; the recessed plate part comprises a bottom plate part and two side plate parts, the base plate part is located between the two adjacent side plate parts in the circumferential direction, the base plate part, and the two side plate parts adjacent to the base plate part in the circumferential direction and the corresponding end plate enclose a second communication channel, the second communication channel is connected with the corresponding heat exchange subchannel, and the second communication channel is also connected with the opening.

[0015] Optionally, the reinforcing component only comprises the annular portion, the concave plate portion comprises a base plate portion and two side plate portions, the base plate portion is located between two adjacent side plate portions in the circumferential direction, the base plate portion, the two side plate portions adjacent to the base plate portion in the circumferential direction and the corresponding end plate enclose a second communication channel, the second communication channel is in communication with the corresponding heat exchange sub-channel, and the second communication channel is also in communication with the adjacent communication hole.

[0016] Optionally, the base plate portion has a first connecting surface, the first connecting surface has a first region, the first region is welded with the adjacent heat exchange plate, the concave plate portion has a second connecting surface, the second connecting surface has a third region, and the third region is welded with the corresponding end plate.

[0017] Optionally, an inner hole wall of the adjacent communication hole forms a reference pattern in the projection of the corresponding end plate along the set direction, the reference pattern has a center point, a straight line passing through the center point is a reference line, a fourth projection region of the first region in the projection of the corresponding end plate along the set direction is greater than or equal to 2.5 mm in size on the reference line, and a fifth projection region of the third region in the projection of the corresponding end plate along the set direction is greater than or equal to 2.5 mm in size on the reference line. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A partial structure diagram of a plate heat exchanger is provided in the utility model.

[0019] Figure 2 For Figure 1 A partial enlarged view at the first inlet and outlet;

[0020] Figure 3 For Figure 1 A partial enlarged view at the second inlet and outlet;

[0021] Figure 4 A structure schematic diagram of a reinforcing component;

[0022] Figure 5 For Figure 4 A top view;

[0023] Figure 6 For Figure 4 A relative position diagram of the reinforcing component and the second adjacent communication hole in the utility model;

[0024] Figure 7 A partial structure diagram of a second adjacent heat exchange plate;

[0025] Figure 8 A structure schematic diagram of another reinforcing component;

[0026] Figure 9 A partial structure diagram of another plate heat exchanger provided by the utility model;

[0027] Figure 10 For Figure 9 A partial enlarged view at the second inlet and outlet;

[0028] Figure 11 A structure schematic diagram of still another reinforcing component.

[0029] Reference signs:

[0030] 1000 - first end plate; 1100 - first inlet and outlet; 1200 - second inlet and outlet; 1300 - corrugation;

[0031] 2000 - second end plate;

[0032] 3000 - heat exchange plate; 3000A - first communication hole; 3000B - second communication hole; 3100 - first adjacent heat exchange plate; 3110 - first adjacent communication hole; 3200 - second adjacent heat exchange plate; 3210 - second adjacent communication hole;

[0033] 4000 - annular gasket;

[0034] 5000 - reinforcing component; 5100 - annular portion; 5110 - base plate portion; 5111 - first connecting surface; 5111A - first region; 5111B - second region; 5120 - recessed plate portion; 5121 - bottom plate portion; 5121A - second connecting surface; 5121A1 - third region; 5121A2 - fourth region; 5122 - side plate portion; 5200 - protruding plate portion; 5210 - first portion; 5220 - second portion; 5230 - opening;

[0035] A - first heat exchange passage; B - second heat exchange passage; B1 - first heat exchange sub-passage; B2 - second heat exchange sub-passage; C - first communication passage; D - second communication passage; P - set direction; Q1 - first central axis; Q2 - second central axis. DETAILED DESCRIPTION

[0036] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0037] In the description of the embodiments of the utility model, the terms "first", "second", "third", "fourth", "fifth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third", "fourth", "fifth" can explicitly or implicitly include one or more of the features.

[0038] In the description of the embodiments of the utility model, need explanation, unless another explicit provision and limitation, term " install ", " link ", " connection " should do broad sense understanding, for example, " connection " can be detachable connection, also can be un detachable connection, can be direct connection, also can be indirectly connected through intermediate medium.

[0039] In the description of the embodiments of the utility model, the term " includes ", " contains " or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence " including a … " does not exclude that there is another same element in the process, method, article or device including the element.

[0040] Please refer to Figures 1-8 , Figure 1 A partial structure diagram of the plate heat exchanger is provided in the utility model; Figure 2 For Figure 1 The partial enlarged view at the first inlet and outlet; Figure 3 For Figure 1 The partial enlarged view at the second inlet and outlet; Figure 4 For the structural diagram of a reinforcing component; Figure 5 For Figure 4 The top view; Figure 6 For Figure 4 The relative position diagram of the reinforcing component and the second adjacent communication hole in the second adjacent heat exchange plate; Figure 7 For the partial structure diagram of the second adjacent heat exchange plate; Figure 8 For the structural diagram of another reinforcing component.

[0041] As Figures 1-3 Indicated, the utility model embodiment provides a plate heat exchanger, it has set direction P. The set direction P is specifically the normal of plate heat exchanger, that is the thickness direction of plate heat exchanger.

[0042] The plate heat exchanger includes two end plates, is first end plate 1000 and second end plate 2000 respectively, first end plate 1000 and second end plate 2000 are oppositely arranged along set direction P, refer to Figure 1The first end plate 1000 is specifically an upper end plate, and the second end plate 2000 is specifically a lower end plate. In addition, the plate heat exchanger is provided with at least two heat exchange plates 3000 between the first end plate 1000 and the second end plate 2000, and each heat exchange plate 3000 is arranged in a stacking manner along a set direction P. In the set direction P, two adjacent heat exchange plates 3000 are connected to each other, for example, by welding. The first end plate 1000, the second end plate 2000 and each heat exchange plate 3000 are provided with corrugations 1300 for improving the strength and heat exchange performance of the corresponding plate body.

[0043] In the embodiment of the utility model, the heat exchange plates 3000 adjacent to the end plates in the set direction P in each heat exchange plate 3000 are defined as adjacent heat exchange plates. Since the number of end plates is two, the number of adjacent heat exchange plates is also two, which are a first adjacent heat exchange plate 3100 and a second adjacent heat exchange plate 3200. The first adjacent heat exchange plate 3100 is arranged adjacent to the first end plate 1000 in the set direction P and is connected to the first end plate 1000 by welding or the like. The second adjacent heat exchange plate 3200 is arranged adjacent to the second end plate 2000 in the set direction P and is connected to the second end plate 2000 by welding or the like.

[0044] After the connection is completed, the plate heat exchanger forms a first heat exchange channel A and a second heat exchange channel B which are isolated from each other. The second heat exchange channel B includes a first heat exchange sub-channel B1 between the first end plate 1000 and the first adjacent heat exchange plate 3100, and a second heat exchange sub-channel B2 between the second end plate 2000 and the second adjacent heat exchange plate 3200. Correspondingly, the first heat exchange channel A is not connected to the first heat exchange sub-channel B1 and the second heat exchange sub-channel B2.

[0045] Please continue to refer to Figure 1 The first end plate 1000 is provided with a first inlet and outlet 1100 and a second inlet and outlet 1200. The first inlet and outlet 1100 is connected to the first heat exchange channel A to introduce the first working medium into the first heat exchange channel A or to lead the first working medium out of the first heat exchange channel A. The second inlet and outlet 1200 is connected to the second heat exchange channel B to introduce the second working medium into the second heat exchange channel B or to lead the second working medium out of the second heat exchange channel B. In this way, the heat exchange between the first working medium and the second working medium is realized.

[0046] In the set direction P, each heat exchange plate 3000 and the first inlet and outlet 1100 correspond to a position provided with a first communication hole 3000A, and each first communication hole 3000A is connected to the first heat exchange channel A.

[0047] In combination with Figure 2For the first adjacent heat exchange plate 3100, the region for opening the first communicating hole 3000A and the region for arranging the first inlet and outlet 1100 in the first end plate 1000 are directly connected, and the first communicating hole 3000A and the first inlet and outlet 1100 are directly connected. In this way, the first inlet and outlet 1100 and the first heat exchange sub-channel B1 are isolated, and the connection reliability of the region for arranging the first inlet and outlet 1100 in the first end plate 1000 and the region for opening the first communicating hole 3000A in the first adjacent heat exchange plate 3100 can be improved. For the second adjacent heat exchange plate 3200, the region for opening the first communicating hole 3000A and the second end plate 2000 are connected through the annular gasket 4000. In this way, the first communicating hole 3000A and the second heat exchange sub-channel B2 are isolated; meanwhile, the annular gasket 4000 can also be used to improve the connection reliability of the second adjacent heat exchange plate 3200 at the first communicating hole 3000A and the second end plate 2000.

[0048] In this way, the region for arranging the first inlet and outlet 1100 in the first end plate 1000 and the first adjacent heat exchange plate 3100 support each other, the reliability is high, and the region for arranging the first inlet and outlet 1100 in the first end plate 1000 is not prone to damage. The second adjacent heat exchange plate 3100 is supported by the annular gasket 4000 at the first communicating hole 3000A and the second end plate 2000, the reliability is also high, and the region of the second end plate 2000 opposite the first communicating hole 3000A of the second adjacent heat exchange plate 3200 is also not prone to damage.

[0049] It should be understood that, for the first adjacent heat exchange plate 3100, the region for opening the first communicating hole 3000A and the region for arranging the first inlet and outlet 1100 in the first end plate 1000 can also be provided with the annular gasket 4000, which can also achieve isolation between the first inlet and outlet 1100 and the first heat exchange sub-channel B1; for the second adjacent heat exchange plate 3200, the region for opening the first communicating hole 3000A and the second end plate 2000 can also be directly connected, which can also achieve isolation between the first communicating hole 3000A and the second heat exchange sub-channel B2.

[0050] Along the set direction P, each heat exchange plate 3000 is provided with a second communicating hole 3000B at a position corresponding to the second inlet and outlet 1200, and each second communicating hole 3000B is connected with the second heat exchange channel A. For the convenience of description, in the embodiment of the utility model, the second communicating hole 3000B of the first adjacent heat exchange plate 3100 is referred to as the first adjacent communicating hole 3110, and the second communicating hole 3000B of the second adjacent heat exchange plate 3200 is referred to as the second adjacent communicating hole 3210.

[0051] In combination with Figure 3For the first adjacent heat exchange plate 3100, the region for opening the first adjacent communication hole 3110 and the region for arranging the second inlet and outlet 1200 on the first end plate 1000 have a spacing in the set direction P. In this way, the second inlet and outlet 1200 and the first adjacent communication hole 3110 can both be in communication with the first heat exchange sub-channel B1, so as not to affect the conduction performance of the second heat exchange channel B. Similarly, for the second adjacent heat exchange plate 3200, the region for opening the second adjacent communication hole 3210 and the second end plate 2000 also have a spacing in the set direction P. In this way, the second adjacent communication hole 3210 can also be in communication with the second heat exchange sub-channel B2, so as not to affect the conduction performance of the second heat exchange channel B.

[0052] In this way, the region for arranging the second inlet and outlet 1200 on the first end plate 1000 and the region for opening the first adjacent communication hole 3110 on the first adjacent heat exchange plate 3100 lack effective support, so that the strength of the region for arranging the second inlet and outlet 1200 on the first end plate 1000 is weak, and cracking and other forms of damage are prone to occur. Similarly, the region of the second end plate 2000 opposite the second adjacent communication hole 3210 also lacks effective support, and because of the arrangement of the corrugation 1300, the thickness of the region of the second end plate 2000 opposite the second adjacent communication hole 3210 is relatively thin, so that the strength of the second end plate 2000 at this region is also weak; at the same time, the second end plate 2000 at this region also directly bears the fluid impact of the second working medium from the second adjacent communication hole 3210; therefore, for the second end plate 2000, the region opposite the second adjacent communication hole 3210 in the set direction P is also prone to cracking and other forms of damage.

[0053] To this end, the plate heat exchanger provided in the embodiments of the present application further comprises a reinforcing component 5000, which can be arranged between the first end plate 1000 and the first adjacent heat exchange plate 3100, or can also be arranged between the second end plate 2000 and the second adjacent heat exchange plate 3200, or can also be arranged between the first end plate 1000 and the first adjacent heat exchange plate 3100 and between the second end plate 2000 and the second adjacent heat exchange plate 3200, so as to at least reinforce one of the first end plate 1000 and the second end plate 2000, thereby reducing the risk of cracking and other forms of damage of the plate heat exchanger at the end plate, and effectively prolonging the service life of the plate heat exchanger.

[0054] In actual use, the possibility of the second end plate 2000 cracking or other forms of damage is higher than that of the first end plate 1000. Therefore, in a preferred implementation manner of the embodiment of the utility model, the reinforcing component 5000 can be arranged only between the second end plate 2000 and the second adjacent heat exchange plate 3200, so as to reinforce the structural strength of the second end plate 2000 in a targeted manner, and meanwhile, the use quantity of the reinforcing component 5000 can be reduced, so as to simplify the structural complexity of the plate heat exchanger provided by the embodiment of the utility model and reduce the assembly difficulty.

[0055] As shown in Figures 4-6 The reinforcing component 5000 comprises a ring-shaped portion 5100.

[0056] The ring-shaped portion 5100 comprises base plate portions 5110 and recessed plate portions 5120 arranged alternately in the circumferential direction, and the number of the base plate portions 5110 and the recessed plate portions 5120 is not limited herein. The base plate portions 5110 are used to be connected with adjacent heat exchange plates, and the specific connection manner is, for example, welding or the like. The recessed plate portions 5120 are recessed relative to the base plate portions 5110 towards the corresponding end plate, and the recessed plate portions 5120 are connected with the corresponding end plate, and the specific connection manner is, for example, also welding or the like. The recessed plate portions 5120 and the adjacent heat exchange plates surround to form first communication channels C, the first communication channels C are connected with the corresponding heat exchange sub-channels, and the first communication channels C are also connected with the corresponding adjacent communication holes, so as not to affect the overall conduction performance of the second heat exchange channels B.

[0057] For detailed description, the foregoing Figure 3For the reinforcing component 5000 arranged between the first end plate 1000 and the first adjacent heat exchange plate 3100, the annular portion 5100 is arranged around the first central axis Q1 of the first adjacent communication hole 3110, the base plate portion 5110 is connected with the first adjacent heat exchange plate 3100, and the concave plate portion 5120 is recessed relative to the base plate portion 5110 towards the first end plate 1000 and is used for connecting with the first end plate 1000; meanwhile, the first communication passage C is enclosed between the concave plate portion 5120 and the first adjacent heat exchange plate 3100, and the first communication passage C is in communication with the second inlet and outlet 1200, the first adjacent communication hole 3110 and the first heat exchange sub-passage B1. For the reinforcing component 5000 arranged between the second end plate 2000 and the second adjacent heat exchange plate 3200, the annular portion 5100 is arranged around the second central axis Q2 of the second adjacent communication hole 3210, the base plate portion 5110 is connected with the second adjacent heat exchange plate 3200, and the concave plate portion 5120 is recessed relative to the base plate portion 5110 towards the second end plate 2000 and is used for connecting with the second end plate 2000; meanwhile, the first communication passage C is also enclosed between the concave plate portion 5120 and the second adjacent heat exchange plate 3200, and the first communication passage C is in communication with the second adjacent communication hole 3210 and the second heat exchange sub-passage B2.

[0058] The concave plate portion 5120 is a smooth transition curved plate portion, for example, an arc plate portion.

[0059] Alternatively, the concave plate portion 5120 is also a bent plate portion formed by combining a plurality of sub-plate portions; for example, see Figure 4 The concave plate portion 5120 includes a bottom plate portion 5121 and two side plate portions 5122, and the two side plate portions 5122 are respectively located on the two sides of the bottom plate portion 5121 in the circumferential direction. In this implementation, the concave plate portion 5120 is an integral structure formed integrally, for example, integrally stamped or integrally cast. Alternatively, each sub-plate portion in the concave plate portion 5120 is prepared separately and then assembled, for example, by welding. Each sub-plate portion is a flat plate portion or a curved plate portion.

[0060] Similarly, each base plate portion 5110 and concave plate portion 5120 in the annular portion 5100 is an integral structure formed integrally or is prepared separately and then assembled by welding.

[0061] Please continue to refer to Figures 4-6 The reinforcing component 5000 further includes a convex plate portion 5200.

[0062] The convex plate part 5200 is located at the inner side of the annular part 5100. The convex plate part 5200 and the annular part 5100 are prepared respectively, and then connected through welding or the like; or the convex plate part 5200 and the annular part 5100 are also an integral structure integrally formed. The convex plate part 5200 protrudes from the end plate towards the corresponding adjacent heat exchange plate. The convex plate part 5200 is used to improve the structural strength of the reinforcing part 5000, thereby being able to improve the reinforcing effect of the reinforcing part 5000 on the first end plate 1000 and the second end plate 2000, and the convex plate part 5200 can also better play a buffering effect on the second working medium, being able to disperse the impact pressure of the second working medium, so as to weaken the impact of the second working medium on the second end plate 2000, and more favorably reduce the risk of damage of the first end plate 1000 and the second end plate 2000.

[0063] In combination Figure 3 The reinforcing part 5000 provided with the convex plate part 5200 is specifically arranged between the second end plate 2000 and the second adjacent heat exchange plate 3200, which can avoid blocking the second inlet and outlet 1200 and the second communication holes 3000B of each heat exchange plate 3000, so as to ensure the overall conduction performance of the second heat exchange channel B; at the same time, the convex plate part 5200 can better play a role in buffering and dispersing the impact pressure of the second working medium, so as to weaken the impact of the second working medium on the second end plate 2000. Based on this installation mode, the convex plate part 5200 specifically protrudes towards the second adjacent heat exchange plate 3200 relative to the second end plate 2000.

[0064] Here, the specific shape of the convex plate part 5200 is not limited in the embodiments of the present application, and can be selected by those skilled in the art according to specific needs in actual application, as long as it can meet the use requirements. For example, the convex plate part 5200 is a spherical plate, which can better buffer the second working medium to reduce the impact force of the second working medium, and can guide the second working medium to be relatively uniformly dispersed into each first communication channel C.

[0065] The base plate part 5110 has a first connecting surface 5111, at least part of the first connecting surface 5111 being connected with the second adjacent heat exchange plate 3200. Similarly, the concave plate part 5120 has a second connecting surface 5121A, which is specifically a surface of the bottom plate part 5121 facing away from the second adjacent heat exchange plate 3200; the second connecting surface 5121A has a third region for being connected with the second end plate 2000, and in the present implementation mode, the second connecting surface 5121A is entirely the third region.

[0066] In the set direction P, the convex plate part 5200 comprises a first part 5210 which protrudes from the first connecting surface 5111 in a direction away from the second end plate 2000. In this way, the size of the convex plate part 5200 in the set direction P is relatively large, and the convex plate part 5200 further improves the structural strength of the reinforcing component 5000, so as to further improve the reinforcing effect of the reinforcing component 5000 on the second end plate 2000. More importantly, the increase in the size of the convex plate part 5200 in the set direction P can also improve the buffering performance of the convex plate part 5200 on the second working medium, so as to increase the buffering space, better reduce the fluid impact force, and more effectively protect the second end plate 2000.

[0067] It should be understood that, in addition to the first part 5210 described above, the convex plate part 5200 also has a second part 5220, which specifically refers to the part of the convex plate part 5200 which does not protrude from the first connecting surface 5111 in the set direction P. As shown in the figure, the second part 5220 can be used to connect with the annular part 5100. Figure 4

[0068] The projection of the second adjacent communication hole 3210 on the second end plate 2000 in the set direction P is a first projection area. The projection of the first part 5210 on the second end plate 2000 in the set direction P is a second projection area. The first projection area can cover the second projection area, and each section of the outer boundary of the first projection area and the outer boundary of the second projection area has a spacing. In this way, the first part 5210 will not block the second adjacent communication hole 3210, and the conduction state between the second adjacent communication hole 3210, the first communication channel C and the second heat exchange sub-channel B2 can be ensured.

[0069] Taking the first projection area and the second projection area as circular areas as an example, that is, the second adjacent communication hole 3210 is a circular hole. In combination with Figure 5 , the first projection area is approximately a dashed line surrounding area, the radial dimension of which is denoted as Φ, and the second projection area is approximately a red line surrounding area, the radial dimension of which is denoted as Φ1, Φ1<Φ. In this way, the first part 5210 avoids blocking the second adjacent communication hole 3210.

[0070] It should be understood that the first projection area and the second projection area described above are not necessarily circular areas, that is, the second adjacent communication hole 3210 is not necessarily a circular hole. In fact, the embodiments of the present application do not limit the specific shape of the first projection area and the second projection area described above, and in actual application, a person skilled in the art can flexibly design according to specific needs, as long as the requirements described above can be met.

[0071] ​The first connecting surface 5111 is divided into a first region 5111A and a second region 5111B. The second region 5111B is covered by the aforementioned first projection region in the projection of the second end plate 2000, and therefore the second region 5111B is not used to connect with the second adjacent heat exchange plate 3200. In the first connecting surface 5111, only the first region 5111A is used to connect with the second adjacent heat exchange plate 3200. It is reflected that Figure 5 that is, the first region 5111A is located outside the dashed line, and the second region 5111B is located inside the dashed line. In actual application, the second region 5111B and the convex plate part 5200 jointly constitute a flow guiding part of the first communication channel C, so as to disperse the second working medium and guide the second working medium into each first communication channel C.

[0072] In order to ensure the reliability of the connection, the size of the first region 5111A needs to be controlled. In the embodiment of the utility model, the inner hole wall of the second adjacent communication hole 3210 along the set direction P forms a reference pattern in the projection of the second end plate. The reference pattern has a center point, and a straight line passing through the center point is a reference line. The projection of the first region 5111A along the set direction P in the second end plate 2000 is a fourth projection region. The size of any one part in the fourth projection region on the reference line can be greater than or equal to 2.5 mm. That is, in the direction of the reference line, the welding size of the first region 5111A and the second adjacent heat exchange plate 3200 can be greater than 2.5 mm, so that the welding quality of the first connecting surface 5111 and the second adjacent heat exchange plate 3200 can be better ensured, so as to reduce the problem of connection failure between the two.

[0073] It is reflected that Figure 5 The reference pattern is specifically a pattern formed by a dashed line, that is, a circle, the center point of which is the center point of the circle, and the reference line is any line passing through the center point. The fourth projection region is approximately the annular region between the blue line and the dashed line. The region enclosed by the blue line is the projection of the entire reinforcing part 5000 along the set direction P in the second end plate 2000, and the radial dimension is Φ3, and Φ3-Φ can be greater than or equal to 2.5 mm.

[0074] In combination with Figure 7 In actual use, due to the influence of the corrugation 1300 provided on the second adjacent heat exchange plate 3200, the region of the second adjacent heat exchange plate 3200 used to connect with the first connecting surface 5111 is usually limited. That is, for the reinforcing part 5000, the projection thereof along the set direction P in the second end plate 2000 is range-limited, and is usually determined. It is reflected that Figure 5That is, Φ3 is basically determined, and correspondingly, the size of Φ3-Φ is also determined. That is, the upper limit value of the size of the fourth projection area on the reference line is associated with the position of the set corrugation 1300 of the second adjacent heat exchange plate 3200, which is not explicitly limited here.

[0075] The embodiment of the utility model also controls the size of the convex plate part 5200, specifically, the projection of the convex plate part 5200 along the set direction P on the second end plate 2000 is a third projection area, the first projection area can also cover the third projection area, that is, the third projection area is also entirely located on the inner side of the first projection area or consistent with the first projection area. In this way, the size of the bottom plate part 5121 can be ensured, and the size of the second connecting surface 5121A is further ensured, so as to facilitate the improvement of the connection size of the second connecting surface 5121A and the second end plate 2000.

[0076] Still taking Figure 5 as reference, the third projection area is also a circular area, which is approximately surrounded by the green line area, and its radial size is Φ2, Φ2≤Φ. In this way, the size of the second connecting surface 5121A of the bottom plate part 5121 on the reference line is greater than or equal to the first area 5111A, so that the bottom plate part 5121 and the second end plate 2000 are also reliably connected.

[0077] It should be understood that the third projection area is not necessarily a circular area, and in actual application, those skilled in the art can flexibly design according to specific needs as long as the foregoing requirements are met.

[0078] Combined with Figure 6 , along the set direction P, the ratio of the size h1 of the convex plate part 5200 and the size h2 of the annular part 5100 is between 1.4 and 1.6, for example, 1.5. In this way, the size of the first part 5210 of the convex plate part 5200 protruding from the first connecting surface 5111 in the set direction P is controlled.

[0079] It should be understood that h1 / h2 is not limited to the above-mentioned 1.4 to 1.6, and in actual application, those skilled in the art can also set h1 / h2 to other values, which are not limited here. In fact, in some other implementations of the embodiment of the utility model, h1 / h2 is also set to be less than 1, that is, the convex plate part 5200 does not protrude from the first connecting surface 5111 along the set direction P, which is also feasible.

[0080] In some optional implementations, as Figure 8 shown, the reinforcing part 5000 also only includes the annular part 5100.

[0081] In the present implementation, the inner side of the annular part 5100 naturally forms a passage and does not block the second working medium in the second heat exchange passage B, so the installation position of the reinforcing part 5000 is diverse, which is installed between the first end plate 1000 and the first adjacent heat exchange plate 3100, or installed between the second end plate 2000 and the second adjacent heat exchange plate 3200, which is not limited here.

[0082] Taking the case that the reinforcing part 5000 is arranged between the first end plate 1000 and the first adjacent heat exchange plate 3100, in combination with Figure 3 , the base plate part 5110 and the two side plate parts 5122 adjacent to the base plate part 5110 in the circumferential direction and the first end plate 1000 form a second communication passage D. The second communication passage D and the first heat exchange sub-passage B1 are in communication, and the second communication passage D also communicates with the first adjacent communication hole 3110, so that the communication performance between the second inlet and outlet 1200, the first heat exchange sub-passage B1 and the first adjacent communication hole 3110 is better.

[0083] Since the first end plate 1000 is provided with the second inlet and outlet 1200, for the reinforcing part 5000 including only the annular part 5100, the second connecting surface 5121A of the bottom plate part 5121 is not all connected with the first end plate 1000. For the convenience of description, the second connecting surface 5121A is divided into a third region 5121A1 and a fourth region 5121A2. Among them, the third region 5121A1 is used to connect with the first end plate 1000.

[0084] In the embodiment of the present application, the inner hole wall of the first adjacent communication hole 3110 also forms a reference pattern in the projection of the first end plate 1000 along the set direction P. The reference pattern has a center point, and the straight line passing through the center point is the reference line. The projection of the third region 5121A1 along the set direction P in the first end plate 1000 is a fifth projection region. The size of any one part in the fifth projection region on the reference line is between 2.5mm-4mm. That is, in the direction of the reference line, the welding size of the third region 5121A1 and the first end plate 1000 is between 2.5mm and 4mm, so that the welding quality of the second connecting surface 5121A and the first end plate 1000 can be better guaranteed.

[0085] It should be understood that in the present implementation, the second connecting surface 5121A also only includes the third region 5121A1, that is, the second connecting surface 5121A is also all welded with the first end plate 1000, which is also feasible.

[0086] Please refer to Figures 9-11 , Figure 9 is a partial structure diagram of another plate heat exchanger provided by the present application; Figure 10 is Figure 9A local enlarged view of the second inlet / outlet; Figure 11 A schematic view of yet another reinforcing member structure.

[0087] As Figures 9-11 shown, for the reinforcing member 5000 comprising the tab portion 5200, in some optional implementations, the tab portion 5200 is further provided with at least one opening 5230, which is capable of communicating both sides of the tab portion 5200 in the set direction P. By so providing, the reinforcing member 5000 also does not block the second working medium, so that the reinforcing member 5000 also has diversity in the installation position selection.

[0088] For example, the reinforcing member 5000 is installed between the first end plate 1000 and the first adjacent heat exchange plate 3100, due to the communication effect of the opening 5230, it does not block the first heat exchange sub-channel B1 and the second communication hole 3000B of each heat exchange plate 3000, and can ensure the overall conduction performance of the second heat exchange channel B. For another example, the reinforcing member 5000 is also installed between the second end plate 2000 and the second adjacent heat exchange plate 3200, which is described with reference to Figure 8 and Figure 9 Due to the conduction effect of the opening 5230, the flow resistance of the second working medium inside the second heat exchange channel B can be effectively reduced to reduce the pressure drop; and the setting of the opening 5230 can also reduce the impact force of the second working medium on the tab portion 5200, which can reduce the possibility of damage to the tab portion 5200.

[0089] Taking the reinforcing member 5000 arranged between the second end plate 2000 and the second adjacent heat exchange plate 3200 as an example, in combination with Figure 10 , the base plate portion 5110 and the two side plate portions 5122 adjacent to the base plate portion 5110 in the circumferential direction and the second end plate 2000 enclose to form a second communication channel D. The second communication channel D and the second heat exchange sub-channel B2 are in communication, and the second communication channel D is also in communication with the second adjacent communication hole 3210, so that the communication performance between the second heat exchange sub-channel B2 and the second adjacent communication hole 3210 is better.

[0090] The number of openings 5230 provided on the tab portion 5200 can not be limited. In specific processing, each opening 5230 can be relatively uniformly distributed on the tab portion 5200, so as to relatively uniformly reduce the impact pressure at each region on the tab portion 5200.

[0091] The above is only the preferred implementation manner of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the present application, and these improvements and refinements should also be regarded as the protection range of the present application.

Claims

1. A plate heat exchanger, characterized in that, The device includes two end plates arranged opposite each other along a set direction, and at least two heat exchange plates are provided between the two end plates. Each heat exchange plate is arranged along the set direction. The heat exchange plate that is adjacent to the end plate is an adjacent heat exchange plate. The adjacent heat exchange plate is provided with an adjacent connecting hole. A heat exchange sub-channel is included between the adjacent heat exchange plate and the corresponding end plate. The adjacent connecting hole can connect the heat exchange sub-channel. A reinforcing member is provided between at least one of the adjacent heat exchange plates and the corresponding end plate. The reinforcing member includes an annular portion arranged around the central axis of the adjacent connecting hole. The annular portion includes a base plate portion and a concave plate portion alternately arranged in the circumferential direction. The base plate portion is connected to the adjacent heat exchange plate. The concave plate portion is recessed relative to the base plate portion toward the corresponding end plate. The concave plate portion is connected to the corresponding end plate. A first connecting channel is formed between the concave plate portion and the adjacent heat exchange plate. The first connecting channel is connected to the corresponding heat exchange sub-channel and is also connected to the adjacent connecting hole.

2. The plate heat exchanger according to claim 1, characterized in that, The reinforcing component also includes a protruding plate portion, which is located inside the annular portion. The protruding plate portion and the annular portion are connected or integrally formed, and the protruding plate portion protrudes from the end plate toward the adjacent heat exchange plate.

3. The plate heat exchanger according to claim 2, characterized in that, The convex plate portion is a spherical panel.

4. The plate heat exchanger according to claim 2, characterized in that, The substrate portion has a first connecting surface, at least a portion of which is connected to the adjacent heat exchange plate. In the set direction, the protruding plate portion includes a first portion that protrudes from the first connecting surface in a direction away from the end plate. The projection of the adjacent connecting holes onto the corresponding end plate along the set direction is the first projection area, and the projection of the first part onto the corresponding end plate along the set direction is the second projection area. The first projection area can cover the second projection area, and each segment in the outer boundary of the first projection area and the outer boundary of the second projection area have a gap.

5. The plate heat exchanger according to claim 4, characterized in that, The projection of the convex portion onto the end plate along the set direction is a third projection area, and the first projection area can also cover the third projection area.

6. The plate heat exchanger according to claim 4, characterized in that, Along the set direction, the ratio of the size h1 of the convex portion to the size h2 of the annular portion is between 1.4 and 1.

6.

7. The plate heat exchanger according to claim 2, characterized in that, The protruding plate portion is provided with at least one opening; The concave plate portion includes a bottom plate portion and two side plate portions. The base plate portion is located between two adjacent side plate portions in the circumferential direction. The base plate portion, the two side plate portions adjacent to the base plate portion in the circumferential direction, and the corresponding end plate enclose each other to form a second connecting channel. The second connecting channel is connected to the corresponding heat exchange sub-channel, and the second connecting channel is also connected to the opening.

8. The plate heat exchanger according to claim 1, characterized in that, The reinforcing component includes only the annular portion. The concave portion includes a base plate portion and two side plate portions. The base plate portion is located between two adjacent side plate portions in the circumferential direction. The base plate portion, the two side plate portions adjacent to the base plate portion in the circumferential direction, and the corresponding end plate enclose each other to form a second connecting channel. The second connecting channel is connected to the corresponding heat exchange sub-channel, and the second connecting channel is also connected to the adjacent connecting hole.

9. The plate heat exchanger according to any one of claims 1-8, characterized in that, The substrate portion has a first connecting surface, the first connecting surface has a first region, the first region is welded to the adjacent heat exchange plate, the concave plate portion has a second connecting surface, the second connecting surface has a third region, the third region is welded to the corresponding end plate.

10. The plate heat exchanger according to claim 9, characterized in that, The inner wall of the adjacent connecting hole is projected onto the corresponding end plate along the set direction to form a reference pattern. The reference pattern has a center point, and the straight line passing through the center point is a reference line. The projection of the first region onto the corresponding end plate along the set direction is a fourth projection region, and the projection of the third region onto the corresponding end plate along the set direction is a fifth projection region. The size of any part of the fourth projection region and the fifth projection region on the reference line is greater than or equal to 2.5 mm.

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