Core plate and plate heat exchanger
By setting up multiple refrigerant diversion grooves on the core plate of the plate heat exchanger, the refrigerant is evenly distributed in the upper and lower half of the core plate, solving the problem of poor heat exchange effect caused by uneven refrigerant distribution, and achieving more efficient heat exchange effect.
Patent Information
- Application Number
- CN202420152266.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-22
AI Technical Summary
In existing plate heat exchangers, the refrigerant is unevenly distributed in the heat exchange chambers on both sides of the core plate, resulting in poor heat exchange effect.
A core plate is designed, by providing a plurality of refrigerant diversion grooves on the first side surface of the core plate, the outlet of the flow channel faces the sides of the core plate, ensuring that the refrigerant is distributed more in the upper and lower half of the refrigerant flow chamber. Even.
Through this design, the refrigerant is distributed more evenly in the upper and lower half of the core plate, which significantly improves the heat exchange effect.
Smart Images
Figure CN222481229U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of heat exchange technology, and in particular to a core plate and a plate heat exchanger. Background Art
[0002] Plate heat exchangers are usually used in heat pump air conditioning systems or other systems that require heat exchange, and the refrigerant and coolant exchange heat in the plate heat exchanger.
[0003] The plate heat exchanger includes two end plates and a plurality of core plates between the two end plates, and a heat exchange cavity for fluid flow is formed between the core plates and between the core plates and the end plates. When the plate heat exchanger is in operation, the refrigerant and the coolant flow in the heat exchange cavity on both sides of the core plate, so that the refrigerant and the coolant exchange heat through the core plate.
[0004] The core plate is provided with a refrigerant inlet hole, a refrigerant outlet hole, a coolant inlet hole and a coolant outlet. The refrigerant inlet hole and the refrigerant outlet hole are generally located on the same side of the center line of the core plate along the length direction. In this way, the amount of refrigerant entering the other side of the center line of the core plate along the length direction is small, resulting in uneven distribution of refrigerant in the heat exchange cavity and poor heat exchange effect. Utility Model Content
[0005] The purpose of the present application is to provide a core plate and a plate heat exchanger to make the refrigerant distribution in the refrigerant flow cavity more uniform and improve the heat exchange effect.
[0006] In order to achieve the above objectives, this application provides the following technical solutions:
[0007] A core plate, the core plate comprising a first liquid inlet and outlet area, a heat exchange area, and a second liquid inlet and outlet area arranged in sequence along a first direction, the first liquid inlet and outlet area is provided with a refrigerant inlet hole and a first coolant hole, the second liquid inlet and outlet area is provided with a refrigerant outlet hole and a second coolant hole, two edges of the core plate opposite to each other along a second direction are respectively a first edge and a second edge, and the distance between the center of the refrigerant inlet hole and the first edge is smaller than the distance between the center of the refrigerant inlet hole and the second edge;
[0008] The first side surface of the core plate is used to form a refrigerant flow cavity, and a plurality of refrigerant inlet guide grooves are arranged on the side of the refrigerant inlet hole of the first side surface facing the heat exchange area, at least some of the outlets of the refrigerant inlet guide grooves face the second edge, and at least some of the outlets of the refrigerant inlet guide grooves face the first edge.
[0009] In one implementation, two edges of the core plate that are opposite to each other along the first direction are respectively a third edge and a fourth edge, and the first liquid inlet and outlet area is arranged close to the third edge;
[0010] The area of the first side surface opposite to the gap between the refrigerant inlet hole and the first coolant hole and close to the third edge is a transition guide area, and a guide recess is provided between the refrigerant inlet hole and the transition guide area, and the transition guide area is used to guide the refrigerant to the side of the first coolant hole away from the heat exchange area.
[0011] Among them, at least part of the outlet of the refrigerant inlet guide groove faces the second edge, that is, the part of the refrigerant inlet guide groove gradually approaches the second edge from the inlet to the outlet, so that the refrigerant entering the part of the refrigerant inlet guide groove flows out toward the second edge after passing through the refrigerant guide groove, so that more refrigerant enters the lower half of the refrigerant flow cavity; at least part of the outlet of the refrigerant inlet guide groove faces the first edge, that is, the part of the refrigerant inlet guide groove gradually approaches the first edge from the inlet to the outlet, so that the refrigerant entering the part of the refrigerant inlet guide groove flows out toward the first edge after passing through the refrigerant guide groove. After passing through multiple refrigerant inlet guide grooves, part of the refrigerant flows to the upper half of the refrigerant flow cavity, and the other part of the refrigerant flows to the lower half of the refrigerant flow cavity, so that after the refrigerant passes through multiple refrigerant inlet guide grooves, the amount of refrigerant entering the upper and lower parts of the refrigerant flow cavity is more uniform, thereby improving the heat exchange effect.
[0012] In one implementation, a plurality of arc-shaped guide grooves are provided in the transition guide area, the arc-shaped guide grooves are concave toward the refrigerant inlet hole, the plurality of arc-shaped guide grooves are arranged in sequence in a direction away from the refrigerant inlet hole, and through grooves are provided between the plurality of arc-shaped guide grooves; and / or,
[0013] The angle between the center line of the guide concave hole and the third edge is 30°-60°; and / or,
[0014] The first side surface is also provided with an arc-shaped channel surrounding the first coolant hole on one side away from the heat exchange area and on the side close to the second edge, one end of the arc-shaped channel is connected to the arc-shaped guide groove and the other end faces the heat exchange area.
[0015] In one implementation, the second side surface of the core plate is used to form a cooling liquid cavity, and a plurality of cooling liquid guide grooves are provided on the side of the first cooling liquid hole of the second side surface facing the heat exchange area, and the notches of at least some of the cooling liquid guide grooves face the second edge, and the notches of at least some of the cooling liquid guide grooves face the first edge;
[0016] The plurality of coolant guide grooves are arranged in sequence along a V-shape, and the opening of the V-shape faces the first coolant hole; and / or, at least some of the plurality of coolant guide grooves have different lengths along their own center lines.
[0017] In one implementation, a plurality of refrigerant inlet guide grooves are arranged in sequence along a V-shape, and the opening of the V-shape faces the refrigerant inlet hole; and / or,
[0018] At least some of the plurality of refrigerant inlet guide grooves have different lengths along their center lines; and / or,
[0019] A raised ring is disposed around the first coolant hole and the second coolant hole on the first side surface, and the raised rings of two adjacent core plates forming a coolant flow cavity abut against each other and seal to prevent the first coolant hole and the second coolant hole from being connected to the coolant flow cavity; and / or,
[0020] A recessed ring is provided around the refrigerant inlet hole and the refrigerant outlet hole of the first side surface, and the recessed rings of two adjacent core plates forming the cooling liquid cavity are abutted and sealed to prevent the refrigerant inlet hole and the refrigerant outlet hole from being connected to the cooling liquid cavity; and / or,
[0021] The first liquid inlet and outlet area and the second liquid inlet and outlet area are symmetrically arranged.
[0022] In one implementation, the core plate is provided with a plurality of protrusions arranged in a matrix, recesses are formed between adjacent protrusions, and the top surfaces of the protrusions and the bottom surfaces of the recesses are connected by a transition surface;
[0023] The top surface of the raised portion is a convex top surface, and the bottom surface of the recessed portion is a concave bottom surface. The multiple convex top surfaces on the core plate are distributed in multiple rows and columns, multiple columns of convex top surfaces are arranged in sequence along a first direction, and multiple rows of convex top surfaces are arranged in sequence along a second direction. There is a row of concave bottom surfaces between two adjacent rows of convex top surfaces, and there is a row of concave bottom surfaces between two adjacent columns of convex top surfaces.
[0024] In one implementation, the two sides of the Nth column of convex top surfaces on the core plate are respectively the first column of concave bottom surfaces and the second column of concave bottom surfaces, two adjacent concave bottom surfaces in the first column of concave bottom surfaces are opposite to the gap between any two adjacent convex top surfaces in the Nth column of convex top surfaces, and two adjacent concave bottom surfaces in the second column of concave bottom surfaces are opposite to the gap between any two adjacent convex top surfaces in the Nth column of convex top surfaces; and / or,
[0025] The two sides of the Nth row of convex top surfaces on the core plate are respectively the first row of concave bottom surfaces and the second row of concave bottom surfaces, two adjacent concave bottom surfaces in the first row of concave bottom surfaces are opposite to the gap between any two adjacent convex top surfaces in the Nth row of convex top surfaces, and two adjacent concave bottom surfaces in the second row of concave bottom surfaces are opposite to the gap between any two adjacent convex top surfaces in the Nth row of convex top surfaces;
[0026] In two adjacent columns of convex top surfaces, the gap between two adjacent convex top surfaces in one column is opposite to a convex top surface in the other column; and / or, in two adjacent rows of convex top surfaces, the gap between two adjacent convex top surfaces in one row is opposite to a convex top surface in the other row; and / or,
[0027] Any two adjacent rows of concave bottom surfaces are symmetrically arranged; and / or,
[0028] Any two adjacent rows of concave bottom surfaces are symmetrically arranged.
[0029] In one implementation, the concave bottom surface is an ellipse, and the length direction of the ellipse has an angle with the first edge; and / or the shape of the convex top surface is a rounded square; and / or the distance between the centers of two adjacent convex top surfaces in the same column and / or row of convex top surfaces is 4mm-8mm; and / or the distance between the centers of two adjacent concave bottom surfaces in the same column and / or row of concave bottom surfaces is 4mm-8mm; and / or the depth of the recessed portion and / or the height of the raised portion is 0.8mm-1.2mm.
[0030] In one implementation, the thickness of the core plate is 0.2mm-0.3mm; and / or the edge of the core plate is provided with a flange, and the flanges of adjacent core plates are overlapped and fixedly connected; and / or the volumes of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of the core plate are different; and / or the ratio of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of the core plate is 0.75-1.
[0031] A plate heat exchanger comprises a plurality of core plates as described above. Compared with the prior art, the beneficial effects of the plate heat exchanger provided in the embodiment of the present application are the same as those of the core plates described above, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0033] Figure 1 A schematic diagram of a first side surface of a core plate provided in an embodiment of the present application;
[0034] Figure 2 A schematic diagram of a first side surface of a first liquid inlet and outlet area provided in an embodiment of the present application;
[0035] Figure 3 A schematic diagram of a second side surface of a first liquid inlet and outlet area provided in an embodiment of the present application;
[0036] Figure 4 A schematic diagram of a first side surface of a second liquid inlet and outlet area provided in an embodiment of the present application;
[0037] Figure 5 A schematic diagram of a portion of the first side surface of the heat exchange area provided in an embodiment of the present application.
[0038] Reference numerals:
[0039] A-first liquid inlet and outlet area, B-heat exchange area, C-second liquid inlet and outlet area, a-first edge, b-second edge, c-third edge, d-fourth edge, e-transition guide area;
[0040] 1-refrigerant inlet hole, 2-refrigerant outlet hole, 3-first coolant hole, 4-second coolant hole, 5-refrigerant inlet guide groove, 6-guide concave hole, 7-recessed ring, 8-arc guide groove, 9-through groove, 10-arc channel, 11-raised ring, 12-coolant guide groove, 13-convex top surface, 14-concave bottom surface. DETAILED DESCRIPTION
[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.
[0044] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.
[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0046] See also Figure 1 The core plate provided in the embodiment of the present application includes a first liquid inlet and outlet area A, a heat exchange area B and a second liquid inlet and outlet area C arranged in sequence along a first direction, that is, the heat exchange area B is located between the first liquid inlet and outlet area A and the second liquid inlet and outlet area C, and the first liquid inlet and outlet area A and the second liquid inlet and outlet area C are respectively located at both ends of the core plate along the first direction.
[0047] The first inlet and outlet area is provided with a refrigerant inlet hole 1 and a first coolant hole 3, and the second inlet and outlet area C is provided with a refrigerant outlet hole 2 and a second coolant hole 4. The first coolant hole 3 can be any one of the coolant inlet and the coolant outlet, and the second coolant hole 4 can be the other of the coolant inlet and the coolant outlet, that is, when the first coolant hole 3 is the coolant inlet, the second coolant hole 4 is the coolant outlet. Preferably, the first coolant hole 3 is the coolant outlet, and the second coolant hole 4 is the coolant inlet, so that the flow directions of the coolant and the refrigerant are opposite, thereby improving the heat exchange effect. The coolant can be an antifreeze or cooling water, etc.
[0048] The two edges of the core plate opposite to each other along the second direction are the first edge a and the second edge b. The two edges of the core plate opposite to each other along the first direction are the third edge c and the fourth edge d. That is, the core plate as a whole is square, the first edge a and the second edge b are parallel, and the extension direction of the first edge a and the second edge b is parallel to the first direction. The third edge c and the fourth edge d are parallel, and the extension direction of the third edge c and the fourth edge d is parallel to the second direction. In the first liquid inlet and outlet area A, the distance from the center of the refrigerant inlet hole 1 to the first edge a is smaller than the distance from the center of the refrigerant inlet hole 1 to the second edge b, that is, the refrigerant inlet hole 1 is closer to the first edge a. The distance from the first coolant hole 3 to the second edge b is smaller than the distance from the center of the first coolant hole 3 to the first edge a, that is, the first coolant hole 3 is closer to the second edge b. In the second liquid inlet and outlet area C, the refrigerant outlet hole 2 can be arranged closer to the first edge a than the second cooling liquid hole 4, and the second cooling liquid hole 4 can be arranged closer to the second edge b than the refrigerant outlet hole 2; or, the second cooling liquid hole 4 can be arranged closer to the first edge a than the refrigerant outlet hole 2, and the refrigerant outlet hole 2 can be arranged closer to the second edge b than the second cooling liquid hole 4.
[0049] The first direction may be the length direction of the core plate, and the second direction may be the width direction of the core plate; or the first direction may be the width direction of the core plate, and the second direction may be the length direction of the core plate. Preferably, the first direction may be the length direction of the core plate, and the second direction may be the width direction of the core plate, so that the flow path of the refrigerant and the coolant is longer and the heat exchange effect is better. The following embodiments are described with the first direction being the length direction of the core plate, and the second direction being the width direction of the core plate.
[0050] The first side surface of the core plate is used to form a refrigerant flow cavity, that is, the first side surfaces of two adjacent core plates together enclose the refrigerant flow cavity, and the first side surface forms the inner wall of the refrigerant flow cavity. A plurality of refrigerant inlet guide grooves 5 are provided on the side of the refrigerant inlet hole 1 of the first side surface facing the heat exchange area B, and the inlets of the plurality of refrigerant inlet guide grooves 5 face the refrigerant inlet hole 1, and the refrigerant entering the refrigerant flow cavity from the refrigerant inlet hole 1 will enter the plurality of refrigerant inlet guide grooves 5 respectively.
[0051] like Figure 1 As shown, at least part of the outlet of the refrigerant inlet guide groove 5 is toward the second edge b, that is, the part of the refrigerant inlet guide groove 5 gradually approaches the second edge b from the inlet to the outlet, so that the refrigerant entering the part of the refrigerant inlet guide groove 5 flows out toward the second edge b after passing through the refrigerant guide groove, so that more refrigerant enters the lower half of the refrigerant flow cavity; at least part of the outlet of the refrigerant inlet guide groove 5 is toward the first edge a, that is, the part of the refrigerant inlet guide groove 5 gradually approaches the first edge a from the inlet to the outlet, so that the refrigerant entering the part of the refrigerant inlet guide groove 5 flows out toward the first edge a after passing through the refrigerant guide groove 5. After passing through multiple refrigerant inlet guide grooves 5, part of the refrigerant flows to the upper half of the refrigerant flow cavity, and the other part of the refrigerant flows to the lower half of the refrigerant flow cavity, so that after the refrigerant passes through multiple refrigerant inlet guide grooves 5, the amount of refrigerant entering the upper and lower parts of the refrigerant flow cavity is more uniform, thereby improving the heat exchange effect.
[0052] The first liquid inlet and outlet area A is arranged close to the third edge c, and the second liquid inlet and outlet area C is arranged close to the fourth edge d. Figure 1 and Figure 2As shown, the area of the first side surface opposite to the gap between the refrigerant inlet hole 1 and the first coolant hole 3 and close to the third edge c is the transition guide area e, that is, the transition guide area e is located in the first liquid inlet and outlet area A, the transition guide area e is located on the first side surface, and the transition guide area e is opposite to the gap between the refrigerant inlet hole 1 and the first coolant hole 3, and the transition guide area e is located on the side of the gap between the refrigerant inlet hole 1 and the first coolant hole 3 facing the third edge c. In addition, a guide concave hole 6 is provided between the refrigerant inlet hole 1 and the transition guide area e, and the transition guide area e is used to guide the refrigerant to the side of the first coolant hole 3 away from the heat exchange area B. That is, the refrigerant entering the refrigerant inlet hole 1 enters the transition guide area e after passing through the guide concave hole 6, and the refrigerant in the transition guide area e is guided to the side of the first coolant hole 3 away from the heat exchange area B, so that a part of the refrigerant flows through the side of the first coolant hole 3 away from the heat exchange area B, so as to avoid the formation of a heat exchange blind area there.
[0053] like Figure 2 As shown, further, a plurality of arc-shaped guide grooves 8 are provided in the transition guide area e, and the arc-shaped guide grooves 8 are concave toward the refrigerant inlet hole 1, that is, the side of the arc-shaped guide grooves 8 close to the refrigerant inlet hole 1 is the concave side, and the extension direction of the plurality of arc-shaped guide grooves 8 can be parallel to the circumference of the refrigerant inlet hole 1. The plurality of arc-shaped guide grooves 8 are arranged in sequence along the direction away from the refrigerant inlet hole 1. Specifically, the plurality of arc-shaped guide grooves 8 can be arranged in parallel with each other, and through grooves 9 are provided between the plurality of arc-shaped guide grooves 8, that is, the refrigerant in one arc-shaped guide groove 8 can flow to another adjacent arc-shaped guide groove 8 through the through grooves 9. In this embodiment, the refrigerant entering the refrigerant inlet hole 1 can enter the transition guide area e through the guide recess 6, and the refrigerant in the transition guide area e flows through the plurality of arc-shaped guide grooves 8 and the through grooves 9 between the plurality of arc-shaped guide grooves 8. Such an arrangement can make the refrigerant more evenly distributed in the transition guide area e, and prevent the formation of a heat exchange blind area in this area. Of course, a plurality of guide grooves extending along a straight line, or guide grooves of any other shape may also be provided in the transition guide area e, which is not limited here.
[0054] In the above embodiment, considering that the transitional flow guiding area e is located in the obliquely lower area of the refrigerant inlet hole 1, the angle between the center line of the flow guiding concave hole 6 and the third edge c is 30°-60°, so that a part of the refrigerant can flow into the transitional flow guiding area e through the flow guiding concave hole 6. Exemplarily, the angle between the center line of the flow guiding concave hole 6 and the third edge c is 30°, 35°, 40°, 45°, 50°, 55° or 60°.
[0055] In addition, the first side surface is also provided with an arc-shaped channel 10 surrounding the side of the first coolant hole 3 away from the heat exchange area B and the side close to the second edge b, one end of the arc-shaped channel 10 is connected to the arc-shaped guide groove 8 and the other end faces the heat exchange area B. Specifically, the arc-shaped channel 10 extends from the gap between the first coolant hole 3 and the third edge c to the gap between the first coolant hole 3 and the second edge b, that is, the arc-shaped channel 10 half surrounds the first coolant hole 3, so that the refrigerant flows through the side of the first coolant hole 3 close to the second edge b and the third edge c, further improving the uniformity of the refrigerant distribution and the heat exchange effect.
[0056] In another embodiment, the second side surface of the core plate is used to form a cooling liquid cavity, the second side surfaces of adjacent core plates form the inner wall of the cooling liquid cavity, and the cooling liquid cavity is formed between the second side surfaces of adjacent core plates. Figure 3 As shown, a plurality of coolant guide grooves 12 are provided on the side of the first coolant hole 3 on the second side surface facing the heat exchange region B, and the coolant flowing through the first coolant hole 3 also flows through the plurality of coolant guide grooves 12 respectively. The notches of at least part of the coolant guide grooves 12 face the second edge b, one end of the coolant guide grooves 12 faces the first coolant hole 3 and the other end faces the second edge b, that is, the coolant guide grooves 12 gradually approach the second edge b along the direction away from the first coolant hole 3; the notches of at least part of the coolant guide grooves 12 face the first edge a, one end of the coolant guide grooves 12 faces the first coolant hole 3 and the other end faces the first edge a, that is, the coolant guide grooves 12 gradually approach the first edge a along the direction away from the first coolant hole 3. As shown Figure 3 As shown, if the first coolant hole 3 is the coolant outlet, more coolant in the upper part can enter the first coolant hole 3, making the coolant amount in the upper and lower parts of the coolant cavity more uniform, thereby improving the heat exchange effect.
[0057] Specifically, the plurality of coolant guide grooves 12 are arranged in sequence along a V-shape, and the opening of the V-shape faces the first coolant hole 3, that is, the plurality of coolant guide grooves 12 are arranged in sequence along a V-shaped fold line, the V-shaped fold line includes a first line segment and a second line segment intersecting, and the opening of the V-shaped fold line faces, such a setting makes the arrangement of the plurality of coolant guide grooves 12 more uniform. Of course, the plurality of coolant guide grooves can also be arranged in sequence along an arc.
[0058] In addition, at least some of the multiple coolant guide grooves have different lengths along their own center lines, so the length of the coolant guide groove can be set according to the different distances from the first coolant hole 3, thereby ensuring the guiding effect of the coolant guide groove. Of course, the lengths of the multiple coolant guide grooves can also be completely equal, which is not limited here.
[0059] like Figure 2As shown, a plurality of refrigerant inlet guide grooves 5 are arranged in sequence along a V-shape, and the opening of the V-shape faces the refrigerant inlet hole 1. That is, a plurality of refrigerant inlet guide grooves 5 are arranged in sequence along a V-shaped fold line, and the V-shaped fold line includes a first line segment and a second line segment intersecting each other, and the opening of the V-shaped fold line faces, so that the arrangement of the plurality of refrigerant inlet guide grooves 5 is more uniform. Of course, the plurality of refrigerant inlet guide grooves 5 can also be arranged in sequence along an arc line.
[0060] Alternatively, at least some of the multiple refrigerant inlet guide grooves 5 have different lengths along their own center lines, so that the lengths of the refrigerant inlet guide grooves 5 can be set according to the different distances between the refrigerant inlet guide grooves 5 and the refrigerant inlet hole 1, thereby ensuring the guiding effect of the refrigerant inlet guide grooves 5. Of course, the lengths of the multiple refrigerant inlet guide grooves 5 can also be completely equal, which is not limited here.
[0061] like Figure 2 As shown, since the refrigerant flow cavity and the cooling liquid cavity are not connected, in order to prevent the first cooling liquid hole 3 and the second cooling liquid hole 4 from being connected to the refrigerant flow cavity, a raised ring 11 can be set around the first cooling liquid hole 3 and the second cooling liquid hole 4 on the first side surface, and the raised rings 11 of the two adjacent core plates forming the refrigerant flow cavity abut against and seal to prevent the first cooling liquid hole 3 and the second cooling liquid hole 4 from being connected to the refrigerant flow cavity. If a refrigerant flow cavity is formed between the first core plate and the second core plate, the raised ring 11 of the first core plate abuts against and seals against the raised ring 11 of the second core plate, thereby isolating the first cooling liquid hole 3 and the second cooling liquid hole 4 from the refrigerant flow cavity by using the raised ring 11, so that the first cooling liquid hole 3 and the second cooling liquid hole 4 are not connected to the refrigerant flow cavity.
[0062] like Figure 2 As shown, similarly, recessed rings 7 are provided around the refrigerant inlet hole 1 and the refrigerant outlet hole 2 on the first side surface, and the recessed rings 7 of the two adjacent core plates that form the cooling liquid cavity abut against each other and are sealed so that the refrigerant inlet hole 1 and the refrigerant outlet hole 2 are not connected to the cooling liquid cavity. If a cooling liquid cavity is formed between the second core plate and the third core plate, the recessed ring 7 of the second core plate abuts against and is sealed with the recessed ring 7 of the third core plate, thereby isolating the refrigerant inlet hole 1 and the refrigerant outlet hole 2 from the cooling liquid cavity by the recessed ring 7, so that the refrigerant inlet hole 1 and the refrigerant outlet hole 2 are not connected to the cooling liquid cavity.
[0063] like Figure 4As shown, in the second liquid inlet and outlet area C, a plurality of refrigerant outlet guide grooves may also be provided on the side of the refrigerant outlet hole 2 on the first side surface facing the heat exchange area B, and the inlet of at least part of the refrigerant outlet guide grooves faces the second edge b, that is, the part of the refrigerant outlet guide grooves gradually moves away from the second edge b from the inlet to the outlet, so that more refrigerant in the lower half of the refrigerant flow cavity enters the refrigerant outlet hole 2; the inlet of at least part of the refrigerant outlet guide grooves faces the first edge a, that is, the part of the refrigerant outlet guide grooves gradually moves away from the first edge a from the inlet to the outlet, so that the refrigerant in the refrigerant flow cavity flows evenly into the refrigerant outlet hole 2. In this embodiment, the plurality of refrigerant outlet guide grooves and the plurality of refrigerant inlet guide grooves 5 on the first side surface may be symmetrically arranged.
[0064] In addition, in the second liquid inlet and outlet area C, a plurality of coolant guide grooves are also arranged around the second coolant hole 4 on the first side surface. In the second liquid inlet and outlet area C, the notches of at least part of the coolant guide grooves face the second edge b, one end of the part of the coolant guide grooves faces the second coolant hole 4 and the other end faces the second edge b, that is, the part of the coolant guide grooves gradually approaches the second edge b along the direction away from the second coolant hole 4; the notches of at least part of the coolant guide grooves face the first edge a, one end of the part of the coolant guide grooves faces the first coolant hole 3 and the other end faces the first edge a, that is, the part of the coolant guide grooves gradually approaches the first edge a along the direction away from the second coolant hole 4, so that the coolant in the coolant cavity flows more evenly. In this embodiment, on the first side surface, the plurality of coolant guide grooves in the first liquid inlet and outlet area A and the plurality of coolant guide grooves in the second liquid inlet and outlet area C can be symmetrically arranged.
[0065] Preferably, the first liquid inlet and outlet area A and the second liquid inlet and outlet area C can be symmetrically arranged, so that the refrigerant and the coolant flow symmetrically in the first liquid inlet and outlet area A and the second liquid inlet and outlet area C, thereby improving the flow stability of the refrigerant and the coolant. Specifically, the second liquid inlet and outlet area C can also be provided with a transition guide area e, and an arc guide groove 8 and a through groove 9 are arranged in the transition guide area e. Of course, the first liquid inlet and outlet area A and the second liquid inlet and outlet area C can also be arbitrarily provided with guide grooves, etc. according to actual conditions, which are not limited here.
[0066] In addition, it should be noted that the protrusion formed on the first side surface of the core plate can simultaneously form a groove on the second side surface, and the groove formed on the first side surface can simultaneously form a protrusion on the second side surface, and the first side surface and the second side surface of the core plate are complementary in concave and convex. The core plate can be formed by stamping or by machining.
[0067] like Figure 5As shown, a plurality of protrusions arranged in a matrix are arranged on the first side surface or the second side surface of the core plate, and recesses are formed between adjacent protrusions. The top surface of the protrusion and the bottom surface of the recess are connected by a transition surface. In order to make the flow of the fluid smoother, the top surface of the protrusion and the bottom surface of the recess are connected by a transition curved surface, so that the fluid flows along the curved surface, and the overall resistance is small. Of course, in the actual processing process, due to the processing operation, some edges and corners may also exist on the transition surface.
[0068] Among them, the top surface of the raised portion is a convex top surface 13, and the bottom surface of the recessed portion is a concave bottom surface 14. The multiple convex top surfaces 13 on the core plate are distributed in multiple rows and columns, multiple columns of convex top surfaces 13 are arranged in sequence along the first direction, and multiple rows of convex top surfaces 13 are arranged in sequence along the second direction. There is a row of concave bottom surfaces 14 between two adjacent rows of convex top surfaces 13, and there is a row of concave bottom surfaces 14 between two adjacent rows of convex top surfaces 13. In this way, the raised portions and recessed portions on the core plate are staggered so that the refrigerant or coolant is constantly disturbed by the raised portions and recessed portions when flowing, which is conducive to sufficient heat exchange of the refrigerant or coolant.
[0069] In the above embodiment, the protrusions on the first side surface of the core plate form recesses on the second side surface, and the recesses on the first side surface of the core plate form protrusions on the second side surface.
[0070] If the two sides of the Nth column of convex top surfaces 13 on the core plate are the first column of concave bottom surfaces 14 and the second column of concave bottom surfaces 14 respectively, the two adjacent concave bottom surfaces 14 in the first column of concave bottom surfaces 14 are opposite to the gap between any two adjacent convex top surfaces 13 in the Nth column of convex top surfaces 13, and the two adjacent concave bottom surfaces 14 in the second column of concave bottom surfaces 14 are opposite to the gap between any two adjacent convex top surfaces 13 in the Nth column of convex top surfaces 13. Specifically, the gap between two adjacent convex top surfaces 13 in the same column is opposite to the two concave bottom surfaces 14 in the same column. It should be noted that, in this embodiment, the centers of the two adjacent concave bottom surfaces 14 in the first column of concave bottom surfaces 14 are opposite to the gap between the centers of any two adjacent convex top surfaces 13 in the Nth column of convex top surfaces 13, and the centers of the two adjacent concave bottom surfaces 14 in the second column of concave bottom surfaces 14 are opposite to the gap between the centers of any two adjacent convex top surfaces 13 in the Nth column of convex top surfaces 13. The center of the convex top surface 13 refers to its center position, and the center of the concave bottom surface 14 refers to its center position. In the first direction or the second direction, the concave bottom surface 14 and the convex top surface 13 may partially overlap. In this way, the concave bottom surface 14 in the same row can guide the refrigerant or coolant to the gap between the convex top surfaces 13 in adjacent rows, so that the refrigerant or coolant can continuously change the flow path when flowing, thereby extending the flow path of the refrigerant or coolant and improving the heat exchange effect.
[0071] Similarly, the two sides of the Nth row of convex top surfaces 13 on the core plate are the first row of concave bottom surfaces 14 and the second row of concave bottom surfaces 14, respectively. Two adjacent concave bottom surfaces 14 in the first row of concave bottom surfaces 14 are opposite to the gap between any two adjacent convex top surfaces 13 in the Nth row of convex top surfaces 13, and two adjacent concave bottom surfaces 14 in the second row of concave bottom surfaces 14 are opposite to the gap between any two adjacent convex top surfaces 13 in the Nth row of convex top surfaces 13. Specifically, the gap between two adjacent convex top surfaces 13 in the same row is opposite to the two concave bottom surfaces 14 in the same row. It should be noted that in this embodiment, the centers of the two adjacent concave bottom surfaces 14 in the first row of concave bottom surfaces 14 are opposite to the gap between the centers of any two adjacent convex top surfaces 13 in the Nth row of convex top surfaces 13, and the centers of the two adjacent concave bottom surfaces 14 in the second row of concave bottom surfaces 14 are opposite to the gap between the centers of any two adjacent convex top surfaces 13 in the Nth row of convex top surfaces 13. The center of the convex top surface 13 refers to its center position, and the center of the concave bottom surface 14 refers to its center position. In the first direction or the second direction, the concave bottom surface 14 and the convex top surface 13 may partially overlap. In this way, the concave bottom surface 14 in the same row can guide the refrigerant or coolant to the gap between the convex top surfaces 13 in the adjacent rows, so that the refrigerant or coolant can continuously change the flow path when flowing, thereby extending the flow path of the refrigerant or coolant and improving the heat exchange effect.
[0072] like Figure 4 As shown, in the above embodiment, four concave bottom surfaces 14 can be arranged around the convex top surface 13, that is, concave bottom surfaces 14 are arranged at the upper right, upper left, lower right and lower left of the convex top surface 13, further increasing the turbulent effect on the refrigerant or coolant.
[0073] Furthermore, in two adjacent rows of convex top surfaces 13, the gap between two adjacent convex top surfaces 13 in one row is opposite to one convex top surface 13 in the other row. That is, the convex top surfaces 13 in two adjacent rows are staggered, which is more convenient for arranging the concave bottom surface 14 in the gap between the convex top surfaces 13, and at the same time increases the turbulence effect on the refrigerant or coolant.
[0074] In two adjacent rows of convex top surfaces 13, the gap between two adjacent convex top surfaces 13 in one row is opposite to one convex top surface 13 in the other row. That is, the convex top surfaces 13 in two adjacent rows are staggered, which is more convenient for arranging the concave bottom surface 14 in the gap between the convex top surfaces 13, and at the same time increases the turbulence effect on the refrigerant or coolant.
[0075] like Figure 4As shown, any two adjacent columns of concave bottom surfaces 14 are symmetrically arranged, and / or any two adjacent rows of concave bottom surfaces 14 are symmetrically arranged. By arranging the concave bottom surfaces 14 in this way, the concave bottom surfaces 14 around the convex top surface 13 can be evenly distributed, so that the multiple concave bottom surfaces 14 can more evenly drain the refrigerant or coolant around the convex top surface 13. Of course, any two adjacent columns of concave bottom surfaces 14 and any two adjacent rows of concave bottom surfaces 14 can also be asymmetrically arranged.
[0076] In addition, the concave bottom surface 14 can be an ellipse, and there is an angle between the length direction of the ellipse and the first edge a. Specifically, the angle between the length direction of the ellipse and the first edge a is 30°-60°, specifically 30°, 35°, 40°, 45°, 50°, 55° or 60°, preferably 45°. In this solution, the resistance on both sides of the concave bottom surface 14 along the length direction is smaller, so that the refrigerant or coolant flows to the two sides of the length direction of the concave bottom surface 14 with smaller resistance, thereby improving the heat exchange effect along the flow path of the refrigerant or coolant. Of course, the concave bottom surface 14 can also be other shapes, such as strips, rounded rectangles, etc.
[0077] The convex top surface 13 is in the shape of a rounded square, and the length direction of the concave bottom surface 14 can be parallel to an edge of the convex top surface 13. Specifically, the length directions of the four concave bottom surfaces 14 around the convex top surface 13 are respectively parallel to the four edges of the convex top surface 13, so that the refrigerant or coolant is evenly distributed around the convex top surface 13, the fluidity of the refrigerant or coolant is more stable, and the flow path of the refrigerant or coolant is extended.
[0078] The distance between the centers of two adjacent convex top surfaces 13 in the same column and / or row of convex top surfaces 13 is 5mm-5.6mm, that is, the gap between two adjacent convex top surfaces 13 is 4mm-8mm, specifically 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm or 5.6mm, preferably 5.3mm. In addition, the distance between the centers of two adjacent concave bottom surfaces 14 in the same column and / or row of concave bottom surfaces 14 is 4mm-8mm, that is, the gap between two adjacent concave bottom surfaces 14 is 5mm-5.6mm, specifically 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm or 5.6mm, preferably 5.3mm. In this way, it is possible to ensure that the gap between two adjacent convex top surfaces 13 or two concave bottom surfaces 14 is moderate, thereby extending the flow path of the refrigerant or coolant and ensuring the smoothness of the flow of the refrigerant or coolant.
[0079] The depth of the concave portion and / or the height of the convex portion is 0.8 mm-1.2 mm, specifically, the depth of the concave portion and / or the height of the convex portion is 0.8 mm, 0.9 mm, 1 mm, 1.1 mm or 1.2 mm, preferably 1 mm. The width of the refrigerant flow cavity or the coolant cavity can be changed by adjusting the depth of the concave portion and / or the height of the convex portion, so the depth of the concave portion and / or the height of the convex portion can be set according to actual conditions.
[0080] In another specific embodiment, considering that if the thickness of the core plate is too small, the mechanical strength is insufficient, and if the thickness of the core plate is too large, the raw materials are wasted, the thickness of the core plate is 0.2 mm-0.3 mm. Exemplarily, the thickness of the core plate is 0.2 mm, 0.22 mm, 0.25 mm, 0.28 mm or 0.3 mm, preferably 0.25 mm.
[0081] The edge of the core plate is provided with a flange, and the flanges of two adjacent core plates are overlapped and fixedly connected. Specifically, the flanges of two adjacent core plates are overlapped and sleeved together, and then the flanges of the two adjacent core plates are welded to achieve the sealing and fixing of the two adjacent core plates. Of course, the two core plates can also be fixedly connected by other methods, which are not limited here.
[0082] The volumes of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of the core plate are different, or the ratio of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of the core plate is 0.75-1. Exemplarily, the volume ratio of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of a heat exchange plate is 0.75, 0.8, 0.82, 0.85, 0.88, 0.9, 0.92, 0.95, 0.98 or 1. In this way, the volume of the refrigerant flow cavity is smaller and the volume of the cooling liquid cavity is larger, which can reduce the pressure drop on the water side and reduce the amount of refrigerant charged.
[0083] The present application also provides a plate heat exchanger, which includes a plurality of core plates as provided in any of the above embodiments. Compared with the prior art, the plate heat exchanger provided in the present application has the same beneficial effects as the above core plates, which will not be described in detail here.
[0084] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.
[0085] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A core board, characterized in that: The core plate comprises a first liquid inlet and outlet area, a heat exchange area and a second liquid inlet and outlet area arranged in sequence along a first direction, the first liquid inlet and outlet area is provided with a refrigerant inlet hole and a first coolant hole, the second liquid inlet and outlet area is provided with a refrigerant outlet hole and a second coolant hole, two edges of the core plate opposite to each other along the second direction are respectively a first edge and a second edge, and the distance between the center of the refrigerant inlet hole and the first edge is smaller than the distance between the center of the refrigerant inlet hole and the second edge; The first side surface of the core plate is used to form a refrigerant flow cavity, and a plurality of refrigerant inlet guide grooves are arranged on the side of the refrigerant inlet hole of the first side surface facing the heat exchange area, at least some of the outlets of the refrigerant inlet guide grooves face the second edge, and at least some of the outlets of the refrigerant inlet guide grooves face the first edge.
2. The core plate according to claim 1, characterized in that: The two edges of the core plate opposite to each other along the first direction are respectively a third edge and a fourth edge, and the first liquid inlet and outlet area is arranged close to the third edge; The area of the first side surface opposite to the gap between the refrigerant inlet hole and the first coolant hole and close to the third edge is a transition guide area, and a guide recess is provided between the refrigerant inlet hole and the transition guide area, and the transition guide area is used to guide the refrigerant to the side of the first coolant hole away from the heat exchange area.
3. The core plate according to claim 2, characterized in that: A plurality of arc-shaped guide grooves are arranged in the transition guide area, the arc-shaped guide grooves are concave toward the refrigerant inlet hole, the plurality of arc-shaped guide grooves are arranged in sequence in a direction away from the refrigerant inlet hole, and through grooves are arranged between the plurality of arc-shaped guide grooves; and / or, The angle between the center line of the guide concave hole and the third edge is 30°-60°; and / or, The first side surface is also provided with an arc-shaped channel surrounding the first coolant hole on one side away from the heat exchange area and on the side close to the second edge, one end of the arc-shaped channel is connected to the arc-shaped guide groove and the other end faces the heat exchange area.
4. The core plate according to claim 1, characterized in that: The second side surface of the core plate is used to form a cooling liquid cavity, and a plurality of cooling liquid guide grooves are arranged on the side of the first cooling liquid hole of the second side surface facing the heat exchange area, and at least some of the cooling liquid guide grooves have their notches facing the second edge, and at least some of the cooling liquid guide grooves have their notches facing the first edge; A plurality of coolant guide grooves are arranged in sequence along a V-shape, and the opening of the V-shape faces the first coolant hole; And / or, at least some of the plurality of coolant guide grooves have different lengths along their center lines.
5. The core plate according to claim 1, characterized in that: A plurality of refrigerant inlet guide grooves are arranged in sequence along a V-shape, and the opening of the V-shape faces the refrigerant inlet hole; and / or, At least some of the plurality of refrigerant inlet guide grooves have different lengths along their center lines; and / or, A raised ring is disposed around the first coolant hole and the second coolant hole on the first side surface, and the raised rings of two adjacent core plates forming a coolant flow cavity abut against each other and seal to prevent the first coolant hole and the second coolant hole from being connected to the coolant flow cavity; and / or, A recessed ring is provided around the refrigerant inlet hole and the refrigerant outlet hole of the first side surface, and the recessed rings of two adjacent core plates forming the cooling liquid cavity are abutted and sealed to prevent the refrigerant inlet hole and the refrigerant outlet hole from being connected to the cooling liquid cavity; and / or, The first liquid inlet and outlet area and the second liquid inlet and outlet area are symmetrically arranged.
6. The core plate according to claim 1, characterized in that: The core plate is provided with a plurality of protrusions arranged in a matrix, and concave portions are formed between adjacent protrusions, and the top surface of the protrusion and the bottom surface of the concave portion are connected by a transition surface; The top surface of the raised portion is a convex top surface, and the bottom surface of the recessed portion is a concave bottom surface. The multiple convex top surfaces on the core plate are distributed in multiple rows and columns, multiple columns of convex top surfaces are arranged in sequence along a first direction, and multiple rows of convex top surfaces are arranged in sequence along a second direction. There is a row of concave bottom surfaces between two adjacent rows of convex top surfaces, and there is a row of concave bottom surfaces between two adjacent columns of convex top surfaces.
7. The core plate according to claim 6, characterized in that: The two sides of the Nth column of convex top surfaces on the core plate are respectively the first column of concave bottom surfaces and the second column of concave bottom surfaces, two adjacent concave bottom surfaces in the first column are opposite to the gap between any two adjacent convex top surfaces in the Nth column of convex top surfaces, and two adjacent concave bottom surfaces in the second column are opposite to the gap between any two adjacent convex top surfaces in the Nth column of convex top surfaces; and / or, The two sides of the Nth row of convex top surfaces on the core plate are respectively the first row of concave bottom surfaces and the second row of concave bottom surfaces, two adjacent concave bottom surfaces in the first row of concave bottom surfaces are opposite to the gap between any two adjacent convex top surfaces in the Nth row of convex top surfaces, and two adjacent concave bottom surfaces in the second row of concave bottom surfaces are opposite to the gap between any two adjacent convex top surfaces in the Nth row of convex top surfaces; In two adjacent columns of convex top surfaces, the gap between two adjacent convex top surfaces in one column is opposite to a convex top surface in the other column; and / or, in two adjacent rows of convex top surfaces, the gap between two adjacent convex top surfaces in one row is opposite to a convex top surface in the other row; and / or, Any two adjacent rows of concave bottom surfaces are symmetrically arranged; and / or, Any two adjacent rows of concave bottom surfaces are symmetrically arranged.
8. The core plate according to claim 7, characterized in that: The concave bottom surface is an ellipse, and the length direction of the ellipse has an angle with the first edge; and / or the shape of the convex top surface is a rounded square; and / or the distance between the centers of two adjacent convex top surfaces in the same column and / or row of convex top surfaces is 4mm-8mm; and / or the distance between the centers of two adjacent concave bottom surfaces in the same column and / or row of concave bottom surfaces is 4mm-8mm; and / or the depth of the recessed portion and / or the height of the raised portion is 0.8mm-1.2mm.
9. The core plate according to claim 1, characterized in that: The thickness of the core plate is 0.2mm-0.3mm; and / or the edge of the core plate is provided with a flange, and the flanges of adjacent core plates are overlapped and fixedly connected; and / or the volumes of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of the core plate are different; and / or the ratio of the refrigerant flow cavity and the cooling liquid cavity formed on both sides of the core plate is 0.75-1.
10. A plate heat exchanger, characterized in that: The invention comprises a plurality of core plates according to any one of claims 1 to 9.