Plate heat exchanger

Abstract

The utility model relates to heat exchanger technical field provides a plate heat exchanger, the utility model provides a plate heat exchanger includes plate piece subassembly and water route board subassembly, the plate piece subassembly includes a plurality of layers of the plate piece of setting, and the interplate flow channel is formed between adjacent plate piece, water route board subassembly is connected in the side portion of plate piece subassembly, water route board subassembly has the water connection of interplate flow channel for connecting, the axial direction of water connection is perpendicular with the interlaminating direction of plate piece. In this plate heat exchanger, the water connection directly horizontally communicates corresponding interplate flow channel, and the interplate flow channel does not need to turn when heat exchange fluid flows into the interplate flow channel and flows out the interplate flow channel, and then can reduce the water inflow resistance and water outflow resistance of plate heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a plate heat exchanger. Background Technology

[0002] A plate heat exchanger consists of several metal heat exchange fins with a certain corrugated structure stacked together, allowing hot and cold fluids to alternately pass between the plates to achieve heat exchange. Specifically, the fluids flowing on either side of the plates are a high-temperature fluid and a low-temperature fluid, respectively, and heat exchange occurs between the two fluids through the metal heat exchange fins. Traditional plate heat exchangers typically have water entering and exiting from a direction perpendicular to the heat exchange fins, requiring a 90° turn in the path, resulting in relatively high flow resistance. Utility Model Content

[0003] This utility model proposes a plate heat exchanger, which aims to change the inlet and outlet water directions of the plate heat exchanger to reduce the inlet and outlet water flow resistance.

[0004] The plate heat exchanger provided by this utility model includes a plate assembly and a water channel plate assembly. The plate assembly includes a plurality of stacked plates, and an inter-plate flow channel is formed between adjacent plates. The water channel plate assembly is connected to the side of the plate assembly and has a water flow connection part for connecting the inter-plate flow channel. The axial direction of the water flow connection part is perpendicular to the stacking direction of the plates.

[0005] In one embodiment, the inter-plate flow channels include alternately arranged odd-numbered and even-numbered inter-plate flow channels. The water channel plate assembly includes a first water channel plate and a second water channel plate, which are respectively disposed at opposite ends in the length or width direction of the plate assembly. The water flow connection includes a first inlet connector and a first outlet connector for inserting into the odd-numbered inter-plate flow channels. One of the first inlet connector and the first outlet connector is disposed in the first water channel plate, and the other is disposed in the second water channel plate. The water flow connection also includes a second inlet connector and a second outlet connector for inserting into the even-numbered inter-plate flow channels. One of the second inlet connector and the second outlet connector is disposed in the first water channel plate, and the other is disposed in the second water channel plate. The axial directions of the first inlet connector, the first outlet connector, the second inlet connector, and the second outlet connector are perpendicular to the stacking direction of the plates.

[0006] In one embodiment, the first inlet connector and the second outlet connector are disposed on the first water circuit board, and the first outlet connector and the second inlet connector are disposed on the second water circuit board; the end of the first water circuit board away from the plate assembly is provided with a first external connector communicating with the first inlet connector and a second external connector communicating with the second outlet connector, and the axes of the inlet connector, the second outlet connector, the first external connector and the second external connector are arranged in parallel; the end of the second water circuit board away from the plate assembly is provided with a third external connector communicating with the first outlet connector and a fourth external connector communicating with the second inlet connector, and the axes of the first outlet connector, the second inlet connector, the third external connector and the fourth external connector are arranged in parallel.

[0007] In one embodiment, the first external connector is provided individually, the number of the first water inlet connectors is consistent with the number of flow channels between odd-numbered layers, the first water channel is provided inside the first water channel, the first water channel includes a first main channel and a plurality of first branch channels branching from the first main channel, the first main channel connects the first external connector and one of the first water inlet connectors, the end of the first branch channel away from the first main channel is connected to a first water inlet connector, and the first main channel and the first branch channels are respectively arranged in a straight line or an arc.

[0008] In one embodiment, the second external connector is provided individually, the number of the second water outlet connectors is consistent with the number of flow channels between even-numbered layers, the first water channel plate is provided with a second water flow channel, the second water flow channel includes a second main channel and a plurality of second branch channels branching from the second main channel, the second main channel connects the second external connector and one of the second water outlet connectors, the end of the second branch channel away from the second main channel connects to a second water outlet connector, and the second main channel and the second branch channels are respectively arranged in a straight line or an arc.

[0009] In one embodiment, the third external connector is provided individually, the number of the first water outlet connectors is odd and the number of inter-layer flow channels is the same, the second water channel plate is provided with a third water flow channel, the third water flow channel includes a third main channel and several third branches branching from the third main channel, the third main channel connects the third external connector and one of the first water outlet connectors, the end of the third branch away from the third main channel connects to one of the first water outlet connectors, and the third main channel and the third branch are respectively arranged in a straight line or an arc.

[0010] In one embodiment, the fourth external connector is provided individually, the number of the second water inlet connectors is consistent with the number of flow channels between even-numbered layers, the second water channel plate is provided with a fourth water flow channel, the fourth water flow channel includes a fourth main channel and a number of fourth branch channels branching from the fourth main channel, the fourth main channel connects the fourth external connector and one of the second water inlet connectors, the end of the fourth branch channel away from the fourth main channel is connected to a second water inlet connector, and the fourth main channel and the fourth branch channels are respectively arranged in a straight line or an arc.

[0011] In one embodiment, the first water inlet connector and the second water inlet connector are arranged opposite to each other, and the first water outlet connector and the second water outlet connector are arranged opposite to each other.

[0012] In one embodiment, the plate heat exchanger further includes a first fixing plate and a second fixing plate. The first fixing plate is disposed on the top surface of the plate assembly in the stacking direction, one end of the first fixing plate is fixedly connected to the first water channel plate, and the other end of the first fixing plate is fixedly connected to the second water channel plate. The second fixing plate is disposed on the bottom surface of the plate assembly in the stacking direction, one end of the second fixing plate is fixedly connected to the first water channel plate, and the other end of the second fixing plate is fixedly connected to the second water channel plate.

[0013] In one embodiment, the water flow connection is a connector, and the connector is interference-fitted with the upper and lower adjacent plates.

[0014] This utility model relates to a plate heat exchanger with a water channel plate assembly connected to the side of the plate assembly along its length or width. The water channel plate assembly has a water flow connection for insertion into the inter-plate flow channels. The axis of the water flow connection is perpendicular to the stacking direction of the plates, meaning the water flow connection directly and horizontally connects to the corresponding inter-plate flow channels. The water channel plate assembly delivers heat exchange fluid to and discharges heat exchange fluid from the inter-plate flow channels through the water flow connection. Because the axis of the water flow connection is along the length or width of the plate heat exchanger, the heat exchange fluid does not need to turn when flowing into and out of the inter-plate flow channels, thus reducing the inlet and outlet flow resistance of the plate heat exchanger. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a top view of an embodiment of the plate heat exchanger provided by this utility model; Figure 2 yes Figure 1 Cross-sectional view at point AA; Figure 3 yes Figure 2 Exploded view; Figure 4 yes Figure 1 Cross-sectional view of BB in the middle; Figure 5 yes Figure 4 Exploded view.

[0017] Explanation of reference numerals in the attached figures: 1. Plate assembly; 11. Plate; 12. Odd-numbered layer inter-plate flow channel; 13. Even-numbered layer inter-plate flow channel; 21. First water channel plate; 211. First external connector; 212. Second external connector; 213. First water flow channel; 2131. First main channel; 2132. First branch channel; 214. Second water flow channel; 2141. Second main channel; 2142. Second branch channel; 22. Second water channel plate; 221. Third external connector 222, Fourth external connector; 223, Third water flow channel; 2231, Third main channel; 2232, Third branch channel; 224, Fourth water flow channel; 2241, Fourth main channel; 2242, Fourth branch channel; 23, Water flow connection part; 231, First water inlet connector; 232, First water outlet connector; 233, Second water inlet connector; 234, Second water outlet connector; 3, First fixing plate; 4, Second fixing plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0020] Furthermore, in embodiments of this utility model, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure, feature, device, or element referred to must have a specific orientation or positional relationship, nor that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0021] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.

[0022] This utility model proposes a plate heat exchanger, which aims to change the inlet and outlet water directions of the plate heat exchanger to reduce the inlet and outlet water flow resistance.

[0023] like Figures 1 to 5 As shown, the embodiment of the plate heat exchanger proposed in this utility model includes a plate assembly 1 and a water channel plate assembly. The plate assembly 1 includes a plurality of stacked plates 11, and an inter-plate flow channel is formed between adjacent plates 11. The water channel plate assembly is connected to the side of the plate assembly 1 and has a water flow connection part 23 for connecting the inter-plate flow channel. The axial direction of the water flow connection part 23 is perpendicular to the stacking direction of the plates 11.

[0024] In a specific embodiment, the flow connection part 23 can be a connector, which is directly inserted into the inter-plate flow channel to achieve connection. Alternatively, the flow connection part 23 can be a connection port, with the plate assembly 1 having a connector corresponding to the inter-plate flow channel. The axial direction of the connector is perpendicular to the stacking direction of the plate 11, and the connector is inserted into the connection port to achieve connection. The following description uses the flow connection part 23 as a connector.

[0025] Specifically, this plate heat exchanger embodiment includes several metal stamped plates 11, each plate 11 having a corrugated structure. The plates 11 are stacked and can be fixed together by welding, screws, or other methods. Interplate channels are formed between adjacent plates 11 for the passage of heat exchange fluid, with the fluid undulating periodically along the corrugation direction within these channels. The heat exchange fluid can be either gas or liquid. One of the odd-numbered interplate channels 12 and the even-numbered interplate channels 13 carries a relatively high-temperature heat exchange fluid, while the other carries a relatively low-temperature heat exchange fluid, facilitating heat exchange. Traditional plate heat exchangers typically have water entering and exiting from a direction perpendicular to the plates, requiring a 90° turn in the path and resulting in significant flow resistance. In contrast, this invention features a water channel plate assembly connected to the side of the plate assembly 1 along its length or width. The water channel plate assembly has a water flow connection portion 23 for insertion into the inter-plate flow channels. The axis of the water flow connection portion 23 is perpendicular to the stacking direction of the plates 11, meaning the water flow connection portion 23 directly and horizontally connects to the corresponding inter-plate flow channels. The water channel plate assembly delivers heat exchange fluid to and discharges heat exchange fluid from the inter-plate flow channels through the water flow connection portion 23. Because the axis of the water flow connection portion 23 is along the length or width of the plate heat exchanger, the heat exchange fluid does not need to turn when flowing into and out of the inter-plate flow channels, thus reducing the inlet and outlet flow resistance of the plate heat exchanger.

[0026] The inter-plate flow channels include alternately arranged odd-numbered inter-plate flow channels 12 and even-numbered inter-plate flow channels 13. After several plates 11 are stacked and assembled, the inter-plate flow channels of the first, third, fifth, and seventh layers (odd-numbered layers, etc.) arranged from bottom to top or top to bottom are the odd-numbered inter-plate flow channels 12, and the inter-plate flow channels of the second, fourth, sixth, and eighth layers (even-numbered layers, etc.) are the even-numbered inter-plate flow channels 13. The water channel plate assembly includes a first water channel plate 21 and a second water channel plate 22, which are respectively disposed at opposite ends in the length or width direction of the plate assembly 1. The water flow connection 23 includes a first inlet connector 231 and a first outlet connector 232 for insertion into the odd-numbered inter-layer flow channels 12. One of the first inlet connector 231 and the first outlet connector 232 is located on the first water channel plate 21, and the other is located on the second water channel plate 22. The water flow connection 23 also includes a second inlet connector 233 and a second outlet connector 234 for insertion into the even-numbered inter-layer flow channels 13. One of the second inlet connector 233 and the second outlet connector 234 is located on the first water channel plate 21, and the other is located on the second water channel plate 22. The axial directions of the first inlet connector 231, the first outlet connector 232, the second inlet connector 233, and the second outlet connector 234 are perpendicular to the stacking direction of the plates 11.

[0027] Specifically, the number of first inlet connectors 231 and first outlet connectors 232 are respectively consistent with the number of odd-numbered inter-layer flow channels 12. A first inlet connector 231 is at least partially horizontally inserted into an odd-numbered inter-layer flow channel 12, and a first outlet connector 232 is at least partially horizontally inserted into an odd-numbered inter-layer flow channel 12. The first inlet connector 231 is used to supply the first heat exchange fluid to the odd-numbered inter-layer flow channel 12, and the first outlet connector 232 is used to discharge the first heat exchange fluid from the odd-numbered inter-layer flow channel 12. When the first inlet connector 231 is located on the first water circuit plate 21, the first outlet connector 232 is located on the second water circuit plate 22; when the first inlet connector 231 is located on the second water circuit plate 22, the first outlet connector 232 is located on the first water circuit plate 21. The first inlet connector 231 and the first outlet connector 232 are respectively inserted into the odd-numbered inter-plate flow channel 12 in the horizontal direction. The inlet and outlet directions of the odd-numbered inter-plate flow channel 12 are both horizontal. The first heat exchange fluid does not need to turn when flowing into and out of the odd-numbered inter-plate flow channel 12, thus avoiding the water flow resistance caused by the turning of the flow channel.

[0028] Similarly, the number of second inlet connectors 233 and second outlet connectors 234 are respectively consistent with the number of even-numbered inter-plate channels 13. A second inlet connector 233 is at least partially horizontally inserted into an even-numbered inter-plate channel 13, and a second outlet connector 234 is at least partially horizontally inserted into an even-numbered inter-plate channel 13. The second inlet connector 233 is used to supply the second heat exchange fluid to the even-numbered inter-plate channels 13, and the second outlet connector 234 is used to discharge the second heat exchange fluid from the even-numbered inter-plate channels 13. When the second inlet connector 233 is located on the first water circuit plate 21, the second outlet connector 234 is located on the second water circuit plate 22; when the second inlet connector 233 is located on the second water circuit plate 22, the second outlet connector 234 is located on the first water circuit plate 21. The second inlet connector 233 and the second outlet connector 234 are respectively inserted into the even-numbered inter-plate flow channel 13 in the horizontal direction. The inlet and outlet directions of the even-numbered inter-plate flow channel 13 are both horizontal. The second heat exchange fluid is located at a bend when it flows into and out of the even-numbered inter-plate flow channel 13, so as to avoid water flow resistance caused by the bend of the flow channel.

[0029] The first water inlet connector 231 and the second water inlet connector 233 can be arranged in the same direction, and the first water outlet connector 232 and the second water outlet connector 234 can be arranged in the same direction. At this time, the water inlet direction and the water outlet direction of the odd-numbered inter-layer flow channel 12 and the even-numbered inter-layer flow channel 13 are the same.

[0030] exist Figures 1 to 5In the embodiment shown, the first water inlet connector 231 and the second water outlet connector 234 are disposed on the first water circuit plate 21, and the first water outlet connector 232 and the second water inlet connector 233 are disposed on the second water circuit plate 22. The first water inlet connector 231, the first water outlet connector 232, the second water inlet connector 233 and the second water outlet connector 234 are respectively inserted into the corresponding inter-plate flow channels in the horizontal direction. Figure 3 and Figure 5 The dotted lines with arrows indicate the inlet and outlet directions of the flow channels 12 and 13 between odd-numbered and even-numbered layers. At this point, the first inlet connector 231 and the second outlet connector 234 are aligned in the same direction, as are the first outlet connector 232 and the second inlet connector 233. The inlet and outlet directions of the flow channels 12 and 13 between odd-numbered and even-numbered layers are opposite, and the first and second heat exchange fluids exchange heat through convection. Furthermore, the end of the first water channel plate 21 furthest from the plate assembly 1 is provided with a first external connector 211 communicating with the first inlet connector 231, and a second external connector 212 communicating with the second outlet connector 234. The axes of the first inlet connector 231, the second outlet connector 234, the first external connector 211, and the second external connector 212 are parallel. That is, the axial directions of the first inlet connector 231, the second outlet connector 234, the first external connector 211, and the second external connector 212 are all horizontal. Similarly, the end of the second water channel plate 22 furthest from the plate assembly 1 is provided with a third external connector 221 that communicates with the first water outlet connector 232, and a fourth external connector 222 that communicates with the second water inlet connector 233. The axes of the first water outlet connector 232, the second water inlet connector 233, the third external connector 221, and the fourth external connector 222 are arranged in parallel. That is to say, the axial directions of the first water outlet connector 232, the second water inlet connector 233, the third external connector 221, and the fourth external connector 222 are all horizontal.

[0031] Using the first and second heat exchange fluids as liquids, the first external connector 211 and the fourth external connector 222 are used to connect the first inlet pipe and the second inlet pipe, respectively. The third external connector 221 and the second external connector 212 are used to connect the first drain pipe and the second drain pipe, respectively. The first inlet pipe and the first drain pipe are used to input and discharge the first heat exchange fluid, respectively, and the second inlet pipe and the second drain pipe are used to input and discharge the second heat exchange fluid, respectively. The first water circuit plate 21 has a first water flow channel 213 that connects the first external connector 211 and several first inlet connectors 231, and a second water flow channel 214 that connects the second external connector 212 and several second outlet connectors 234. The second water circuit plate 22 has a third water flow channel 223 that connects the third external connector 221 and several first outlet connectors 232, and a fourth water flow channel 224 that connects the fourth external connector 222 and the second inlet connector 233.

[0032] In practical applications, the number of first inlet connectors 231 is the same as the number of flow channels 12 between odd-numbered layers. The number of first outer connectors 211 and first water flow channels 213 can be the same as the number of first inlet connectors 231. In this case, a first water flow channel 213 connects a first inlet connector 231 and a first outer connector 211 in a straight line or arc. The number of first outlet connectors 232 is the same as the number of flow channels 12 between odd-numbered layers. The number of third outer connectors 221 and third water flow channels 223 can be the same as the number of first outlet connectors 232. In this case, a third water flow channel 223 connects a first outlet connector 232 and a third outer connector 221 in a straight line or arc. The number of second inlet connectors 233 is the same as the number of even-numbered inter-layer flow channels 13. The number of fourth external connectors 222 and fourth water flow channels 224 can be the same as the number of second inlet connectors 233. In this case, a fourth water flow channel 224 connects a second inlet connector 233 and a fourth external connector 222 in a straight line or arc. The number of second outlet connectors 234 is the same as the number of even-numbered inter-layer flow channels 13. The number of second external connectors 212 and second water flow channels 214 can be the same as the number of second outlet connectors 234. In this case, a second water flow channel 214 connects a second outlet connector 234 and a second external connector 212 in a straight line or arc. In this embodiment, each inlet connector and outlet connector is connected to the corresponding external connector through a single water flow channel. Each water flow channel is equipped with a control valve to control the flow path opening and closing. The water flow channels are arranged in a straight line or arc, which can avoid the first heat exchange fluid and the second heat exchange fluid from making a 90° turn in the water circuit board, thereby avoiding the local resistance caused by the turn.

[0033] Or, such as Figures 1 to 5As shown, each of the first external connector 211, the second external connector 212, the third external connector 221, and the fourth external connector 222 is provided individually. At this time, the first water flow channel 213 includes a first main channel 2131 and several first branch channels 2132 branching from the first main channel 2131. The first main channel 2131 connects the first external connector 211 and one of the first water inlet connectors 231. The end of the first branch channel 2132 away from the first main channel 2131 is connected to a first water inlet connector 231. The first main channel 2131 and the first branch channel 2132 are respectively arranged in a straight line or an arc. The second water flow channel 214 includes a second main channel 2141 and several second branch channels 2142 branching from the second main channel 2141. The second main channel 2141 connects to the second external connector 212 and one of the second water outlet connectors 234. The end of the second branch channel 2142 away from the second main channel 2141 connects to the second water outlet connector 234. The second main channel 2141 and the second branch channel 2142 are respectively arranged in a straight line or an arc. The third water flow channel 223 includes a third main channel 2231 and several third branch channels 2232 branching from the third main channel 2231. The third main channel 2231 connects to the third external connector 221 and one of the first water outlet connectors 232. The end of the third branch channel 2232 away from the third main channel 2231 connects to the first water outlet connector 232. The third main channel 2231 and the third branch channel 2232 are respectively arranged in a straight line or an arc. The fourth water flow channel 224 includes a fourth main channel 2241 and several fourth branch channels 2242 branching from the fourth main channel 2241. The fourth main channel 2241 connects to the fourth external connector 222 and one of the second water inlet connectors 233. The end of the fourth branch channel 2242 away from the fourth main channel 2241 is connected to the second water inlet connector 233. The fourth main channel 2241 and the fourth branch channel 2242 are respectively arranged in a straight line or an arc.

[0034] In this embodiment, the first external connector 211, the second external connector 212, the third external connector 221, and the fourth external connector 222 are individually configured. Each water flow channel is connected to all corresponding inlet or outlet connectors through several branches. The first main channel 2131, the second main channel 2141, the third main channel 2231, and the fourth main channel 2241 are each equipped with a control valve to control the flow path opening and closing. In this embodiment, only the opening and closing of the main channel needs to be controlled to control the opening and closing of all water paths in the odd-numbered inter-layer channels 12 or the even-numbered inter-layer channels 13. Compared with multiple independently configured water flow channels, each with a control valve, the number of control valves can be reduced. Furthermore, each main channel and each branch channel is arranged in a straight line or arc, which can avoid the first and second heat exchange fluids from making a 90° turn within the water channel plate, thereby avoiding local resistance caused by the turn.

[0035] Based on the convective heat exchange between the first and second heat exchange fluids, the first inlet connector 231 and the first outlet connector 232 can be arranged opposite each other, and the second inlet connector 233 and the second outlet connector 234 can be arranged opposite each other. In this case, the line connecting the first inlet connector 231 and the first outlet connector 232 is parallel to the line connecting the second inlet connector 233 and the second outlet connector 234, allowing the first and second heat exchange fluids to flow in and out directly. Alternatively, as... Figures 1 to 5 As shown, the first inlet connector (231) and the second inlet connector (233) are arranged opposite to each other, and the first outlet connector (232) and the second outlet connector (234) are arranged opposite to each other. At this time, the line connecting the first inlet connector 231 and the first outlet connector 232 intersects the line connecting the second inlet connector 233 and the second outlet connector 234. On the one hand, this can extend the heat exchange path of the first heat exchange fluid and the second heat exchange fluid, so as to promote full heat exchange between the two fluids. On the other hand, it can make the first heat exchange fluid and the second heat exchange fluid have a composite flow mode of counter-current flow and cross-flow, which can further improve the heat exchange efficiency.

[0036] To ensure the stability of the stacked plates 11, the embodiment of this plate heat exchanger may further include a first fixing plate 3 and a second fixing plate 4. The first fixing plate 3 is disposed on the top surface of the plate assembly 1 in the stacking direction. One end of the first fixing plate 3 is fixedly connected to the first water channel plate 21, and the other end of the first fixing plate 3 is fixedly connected to the second water channel plate 22. The second fixing plate 4 is disposed on the bottom surface of the plate assembly 1 in the stacking direction. One end of the second fixing plate 4 is fixedly connected to the first water channel plate 21, and the other end of the second fixing plate 4 is fixedly connected to the second water channel plate 22.

[0037] Specifically, the first fixing piece 3 is disposed on the top surface of the plurality of plates 11 in the stacking direction and is in contact with and attached to the topmost plate 11. The second fixing piece 4 is disposed on the bottom surface of the plurality of plates 11 in the stacking direction and is in contact with and attached to the bottommost plate 11. The lengths of the first fixing piece 3 and the second fixing piece 4 are greater than the lengths of the plates 11. The two ends of the first fixing piece 3 and the second fixing piece 4 are respectively fixed to the first water channel plate 21 and the second water channel plate 22. The fixing method can be screw fixing, welding fixing, adhesive fixing, etc., thereby pressing the plurality of fixing pieces together in the stacking direction, thereby ensuring the connection strength of the plurality of plates 11 and improving the overall stability of the plate heat exchanger.

[0038] In this technical solution, the first inlet connector 231, the first outlet connector 232, the second inlet connector 233, and the second outlet connector 234 can be interference-fitted with the upper and lower adjacent plates 11. That is, when the first inlet connector 231, the first outlet connector 232, the second inlet connector 233, and the second outlet connector 234 are inserted into the corresponding inter-plate flow channels, the outer side wall of the connector is at least partially in close contact with the upper and lower adjacent plates 11, and stability is maintained by the clamping force and friction between the connector and the plate 11. The interference fit structure is simple and easy to assemble.

[0039] Furthermore, in order to ensure the sealing of the joint connection and prevent the heat exchange fluid in the inter-plate flow channel from leaking from the joint connection, the periphery of the first water inlet joint 231, the first water outlet joint 232, the second water inlet joint 233 and the second water outlet joint 234 can be fitted with sealing rings (not shown), and then interfere with the upper and lower adjacent plates 11.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plate heat exchanger, characterized in that, include: A plate assembly, the plate assembly comprising a plurality of stacked plates, with inter-plate flow channels formed between adjacent plates; A water channel board assembly is connected to the side of the plate assembly. The water channel board assembly has a water flow connection portion for connecting the flow channels between the plates. The axial direction of the water flow connection portion is perpendicular to the stacking direction of the plates.

2. The plate heat exchanger as described in claim 1, characterized in that, The inter-plate flow channel includes alternately arranged odd-numbered inter-plate flow channels and even-numbered inter-plate flow channels. The water channel plate assembly includes a first water channel plate and a second water channel plate, which are respectively disposed at opposite ends of the length or width direction of the plate assembly. The water flow connection includes a first water inlet connector and a first water outlet connector for insertion into the flow channel between odd-numbered layers, wherein one of the first water inlet connector and the first water outlet connector is disposed on the first water channel plate, and the other is disposed on the second water channel plate; The water flow connection part further includes a second water inlet connector and a second water outlet connector for insertion into the flow channel between even-numbered layers, wherein one of the second water inlet connector and the second water outlet connector is disposed on the first water circuit plate, and the other is disposed on the second water circuit plate; The axial directions of the first water inlet connector, the first water outlet connector, the second water inlet connector, and the second water outlet connector are perpendicular to the stacking direction of the plates.

3. The plate heat exchanger as described in claim 2, characterized in that, The first water inlet connector and the second water outlet connector are disposed on the first water circuit board, and the first water outlet connector and the second water inlet connector are disposed on the second water circuit board; The first water circuit board has a first external connector that communicates with the first water inlet connector and a second external connector that communicates with the second water outlet connector at one end away from the board assembly. The axes of the first water inlet connector, the second water outlet connector, the first external connector and the second external connector are arranged in parallel. The second water circuit board has a third external connector that communicates with the first water outlet connector and a fourth external connector that communicates with the second water inlet connector at one end away from the board assembly. The axes of the first water outlet connector, the second water inlet connector, the third external connector and the fourth external connector are arranged in parallel.

4. The plate heat exchanger as described in claim 3, characterized in that, The first external connector is provided individually, and the number of the first water inlet connectors is the same as the number of flow channels between odd-numbered layers. The first water channel is provided inside the first water channel, which includes a first main channel and several first branch channels branching from the first main channel. The first main channel connects the first external connector and one of the first water inlet connectors. The end of the first branch channel away from the first main channel is connected to a first water inlet connector. The first main channel and the first branch channels are respectively arranged in a straight line or an arc.

5. The plate heat exchanger as described in claim 3, characterized in that, The second external connector is provided individually, and the number of the second water outlet connectors is the same as the number of flow channels between even-numbered layers. The first water channel plate is provided with a second water flow channel, which includes a second main channel and several second branch channels branching from the second main channel. The second main channel connects the second external connector and one of the second water outlet connectors. The end of the second branch channel away from the second main channel is connected to a second water outlet connector. The second main channel and the second branch channel are respectively arranged in a straight line or an arc.

6. The plate heat exchanger as described in claim 3, characterized in that, The third external connector is provided individually. The number of the first water outlet connectors is odd and the number of flow channels between the layers is the same. The second water channel plate is provided with a third water flow channel. The third water flow channel includes a third main channel and several third branches branching from the third main channel. The third main channel connects the third external connector and one of the first water outlet connectors. The end of the third branch away from the third main channel is connected to a first water outlet connector. The third main channel and the third branch are respectively arranged in a straight line or an arc.

7. The plate heat exchanger as described in claim 3, characterized in that, The fourth external connector is provided individually. The number of the second water inlet connectors is the same as the number of flow channels between even-numbered layers. The second water channel plate is provided with a fourth water flow channel. The fourth water flow channel includes a fourth main channel and several fourth branch channels branching from the fourth main channel. The fourth main channel connects the fourth external connector and one of the second water inlet connectors. The end of the fourth branch channel away from the fourth main channel is connected to a second water inlet connector. The fourth main channel and the fourth branch channel are respectively arranged in a straight line or an arc.

8. The plate heat exchanger as described in claim 3, characterized in that, The first water inlet connector and the second water inlet connector are arranged opposite to each other, and the first water outlet connector and the second water outlet connector are arranged opposite to each other.

9. The plate heat exchanger as described in claim 2, characterized in that, The plate heat exchanger further includes a first fixing plate and a second fixing plate. The first fixing plate is disposed on the top surface of the plate assembly in the stacking direction. One end of the first fixing plate is fixedly connected to the first water channel plate, and the other end of the first fixing plate is fixedly connected to the second water channel plate. The second fixing piece is disposed on the bottom surface of the plate assembly in the stacking direction. One end of the second fixing piece is fixedly connected to the first water channel plate, and the other end of the second fixing piece is fixedly connected to the second water channel plate.

10. The plate heat exchanger according to any one of claims 1 to 9, characterized in that, The water flow connection part is a connector, and the connector is interference-fitted with the upper and lower adjacent plates.

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