Plate heat exchanger

Abstract

The invention relates to the technical field of automobile heat management, in particular to a plate heat exchanger which comprises a plurality of circulation plate assemblies which are sequentially arranged in a stacked mode, each circulation plate assembly comprises a first plate piece and a second plate piece which are the same in structure, and the second plate piece is stacked with the first plate piece after rotating by 180 degrees. The first plate sheet is provided with a rectangular body part, the center position of the body part is provided with flow dividing protrusions, the flow dividing protrusions comprise the first type of protrusions, the second type of protrusions and the third type of protrusions, and the first type of protrusions, the second type of protrusions and the third type of protrusions divide the first circulation space into a plurality of V-shaped flow channels. Therefore, fluid can flow from the first side of the first plate sheet to the other side through the V-shaped flow channel and then flow back to the first side in a baffling mode, the fluid is evenly distributed, and the heat exchange effect is good. In addition, fluid can be strongly disturbed through the first type of protrusions, the second type of protrusions and the third type of protrusions, so that the purpose of enhancing heat exchange is achieved, and the heat exchange efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of automobile thermal management, and in particular to a plate heat exchanger. Background Art

[0002] The plate heat exchanger is a core component of the battery thermal management system of new energy vehicles and is often used as a battery cooler and liquid cooling condenser. Among them, the main function of the battery cooler is to absorb the heat on the coolant side through the evaporation of the refrigerant, thereby reducing the temperature of the coolant entering the battery liquid cooling plate, thereby cooling the power battery. The main function of the liquid cooling condenser is to release heat to the coolant through the condensation of the refrigerant. After the temperature of the coolant rises, it enters the heater core in the air conditioning box. The high-temperature coolant increases the temperature of the air flowing through the heater core, thereby heating the passenger compartment. In general, the cooling or heating function is achieved through the heat exchange between the refrigerant and the coolant.

[0003] However, in the current plate heat exchangers, the fluid (refrigerant or coolant) tends to flow on the side with smaller flow resistance (i.e., the inlet and outlet sides) when flowing in the interlayer flow channel, and the fluid on the other side is significantly reduced, the fluid flow distribution is uneven, the flow rate is relatively slow, and the heat exchange efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a plate heat exchanger, in which the fluid flows more evenly in the space between adjacent plates, the disturbance of the fluid flow is larger, and the heat exchange efficiency is high.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a plate heat exchanger, which comprises:

[0007] A circulation plate assembly, the circulation plate assembly comprising a first plate and a second plate of the same structure, the second plate being stacked with the first plate after being rotated 180°, a first circulation space for accommodating fluid flow being formed between the first plate and the second plate; a plurality of the circulation plate assemblies are provided, the plurality of the circulation plate assemblies are stacked in sequence, a second circulation space for accommodating fluid flow is formed between two adjacent circulation plate assemblies, and the first circulation space and the second circulation space are not connected to each other;

[0008] The first plate has a rectangular main body, two first through holes are provided on one side of the main body along the first direction, and two second through holes are provided on the other side of the main body along the first direction, and the first through holes and the second through holes are both arranged near a corner of the main body; a diverter protrusion is provided at the center of the main body, and the diverter protrusion includes a first type of protrusion, a second type of protrusion and a third type of protrusion, and the first type of protrusion, the second type of protrusion and the third type of protrusion divide the first circulation space into a plurality of V-shaped flow channels, and the two ends of the plurality of the V-shaped flow channels are respectively connected to one of the first through holes.

[0009] Optionally, the first type of protrusions and the second type of protrusions are both in the shape of long strips, and the first type of protrusions and the second type of protrusions are inclined toward each other compared to the axis e of the main body along the first direction;

[0010] An included angle α is formed between the axis of the first type of protrusion in the length direction and the axis of the second type of protrusion in the length direction, and the value range of α is 50°≤α≤130°.

[0011] Optionally, the first type of protrusions and the second type of protrusions are both provided in plurality, the plurality of the first type of protrusions are arranged in an array on one side of the main body along the second direction, and the plurality of the second type of protrusions are arranged in an array on the other side of the main body along the second direction;

[0012] Along the second direction, the distance between two adjacent protrusions of the first type and the distance between two adjacent protrusions of the second type are both L, and the value range of L is 1mm≤L≤6mm.

[0013] Optionally, along the first direction, the distance between two adjacent protrusions of the first type and the distance between two adjacent protrusions of the second type are both W, and the value range of W is 2mm≤W≤11mm.

[0014] Optionally, the third type of protrusion comprises a first guide segment, a second guide segment and a stop segment, and the first guide segment and the second guide segment are respectively connected to one end of the stop segment;

[0015] The main body portion includes two first side edges arranged opposite to each other and two second side edges arranged opposite to each other, the first side edges extend along the second direction, the second side edges extend along the first direction, the stop section is parallel to the first side edges, and the first guide section and the second guide section are inclined toward each other compared to the axis e of the main body portion along the first direction.

[0016] Optionally, the first guide segment and the second guide segment are both in the shape of long strips, and an angle β is formed between an axis in the length direction of the first guide segment and an axis in the length direction of the second guide segment, and a value range of β is 50°≤β≤130°.

[0017] Optionally, along a third direction, the first type of protrusions, the second type of protrusions and the third type of protrusions have the same height, and the third direction is perpendicular to both the first direction and the second direction;

[0018] Along the third direction, the heights of the first type of protrusions, the second type of protrusions and the third type of protrusions are all H, and the value range of H is 0.6mm≤H≤2mm.

[0019] Optionally, the plate heat exchanger includes an end plate and a bottom plate, and a plurality of the flow plate assemblies are clamped between the end plate and the bottom plate; a first inlet and a first outlet are provided on the end plate, and the first inlet and the first outlet are both connected to the first flow space; a second inlet and a second outlet are also provided on the end plate, and the second inlet and the second outlet are both connected to the second flow space.

[0020] Optionally, an annular rib is provided around the second through hole of the first plate, the annular rib abuts against the main body of the adjacent second plate around the first through hole, and the inner side of the connection position between the annular rib and the main body forms a connecting channel.

[0021] Optionally, a connecting portion is provided on the circumference of the main body, and two connecting portions stacked up and down are connected by welding.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a plate heat exchanger, which includes a plurality of flow plate assemblies stacked in sequence, each flow plate assembly includes a first plate and a second plate of the same structure, the second plate is stacked with the first plate after being rotated 180 degrees, and a first flow space for accommodating fluid flow is formed between the first plate and the second plate. A second flow space for accommodating fluid flow is formed between two adjacent flow plate assemblies, the first flow space and the second flow space are not connected to each other, and heat exchange between the two fluids is achieved by injecting fluids of different temperatures into the first flow space and the second flow space respectively.

[0024] The first plate has a rectangular main body, and a diverter protrusion is provided at the center of the main body. The diverter protrusion includes a first type of protrusion, a second type of protrusion and a third type of protrusion. The first type of protrusion, the second type of protrusion and the third type of protrusion divide the first circulation space into a plurality of V-shaped flow channels, and the two ends of the plurality of V-shaped flow channels are respectively connected to a first through hole. When injecting fluid into the first circulation space, the fluid can enter through one of the first through holes, and then flow along the V-shaped flow channel to the side where the second through hole is located, and then flow back to the side where the first through hole is located, and flow out from another first through hole. In this way, the flow path and flow resistance, two factors that cause the flow distribution of the fluid, are balanced, and the distribution of the fluid in the first circulation space is relatively uniform, so that the interlayer temperature distribution between the first plate and the second plate is uniform, the heat exchange is uniform, and the heat exchange effect is good. In addition, the first type of protrusion, the second type of protrusion and the third type of protrusion can also strongly disturb the fluid, thin the flow boundary layer and the thickness of the thermal boundary layer of the fluid, thereby achieving the purpose of strengthening heat exchange, and the heat exchange efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 An exploded view of a plate heat exchanger provided in an embodiment of the present invention;

[0027] Figure 2 The cross-sectional structure of the plate heat exchanger provided in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0029] Figure 4 The cross-sectional structure of the plate heat exchanger provided in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0031] Figure 6 It is a schematic structural diagram of the first plate (second plate) provided in an embodiment of the present invention;

[0032] Figure 7 A top view of a first plate (second plate) provided in an embodiment of the present invention;

[0033] Figure 8 A front view of a first plate (second plate) provided in an embodiment of the present invention;

[0034] Fig. 9 for Figure 8 A partial enlarged view of point C in the middle.

[0035] In the figure:

[0036] 101, first circulation space; 201, second circulation space;

[0037] 10. first plate; 11. main body; 1101. first side; 1102. second side; 111. first through hole; 112. second through hole; 1121. annular rib; 113. first type of protrusion; 114. second type of protrusion; 115. third type of protrusion; 1151. first guide section; 1152. second guide section; 1153. stop section; 12. connecting portion;

[0038] 20. Second plate; 30. End plate; 31. First inlet; 32. First outlet; 33. Second inlet; 331. Refrigerant inlet connector; 34. Second outlet; 341. Refrigerant outlet connector; 40. Bottom plate; 50. Mounting plate; 51. Through hole; 52. Fixing hole. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] like Figure 1-Figure 5As shown, this embodiment provides a plate heat exchanger, which includes a plurality of flow plate assemblies stacked in sequence. Each flow plate assembly includes a first plate 10 and a second plate 20 of the same structure. The second plate 20 is stacked with the first plate 10 after rotating 180°, and a first flow space 101 for fluid flow is formed between the first plate 10 and the second plate 20. A second flow space 201 for fluid flow is formed between two adjacent flow plate assemblies. The first flow space 101 and the second flow space 201 are not connected to each other. Along the height direction ( Figure 1 The two first circulation spaces 101 arranged at intervals along the Z-axis direction (as shown in FIG. 1 ) are connected to each other, and the two second circulation spaces 201 arranged at intervals along the height direction of the plate heat exchanger are connected to each other. Fluids of different temperatures are respectively injected into the first circulation space 101 and the second circulation space 201, thereby achieving heat exchange between the two fluids.

[0047] As an optional solution, this embodiment is illustrated by taking the example of injecting refrigerant into the first circulation space 101 and injecting cooling liquid into the second circulation space 201, and the refrigerant can exchange heat with the cooling liquid. Of course, in other embodiments, cooling liquid can also be injected into the first circulation space 101 and refrigerant can be injected into the second circulation space 201, which is not limited here.

[0048] Furthermore, the first plate 10 has a rectangular body portion 11, and the body portion 11 is along the first direction ( Figure 1 Two first through holes 111 are provided on one side of the main body 11 along the Y-axis direction shown in the figure, that is, the width direction of the main body 11, and two second through holes 112 are provided on the other side of the main body 11 along the first direction. The first through holes 111 and the second through holes 112 are both provided near a corner of the main body 11. A diverter protrusion is provided at the center of the main body 11, and the diverter protrusion includes a first type of protrusion 113, a second type of protrusion 114 and a third type of protrusion 115. The first type of protrusion 113 and the second type of protrusion 114 are located at the third type of protrusion 115 along the second direction ( Figure 1 On both sides of the X-axis direction shown in the figure, that is, the length direction of the main body 11), the first type of protrusions 113, the second type of protrusions 114 and the third type of protrusions 115 divide the first flow space 101 into a plurality of V-shaped flow channels, and the two ends of the plurality of V-shaped flow channels are respectively connected to a first through hole 111.

[0049] When the refrigerant is injected into the first circulation space 101, the refrigerant can enter through one of the first through holes 111, then flow along the V-shaped flow channel to the side where the second through hole 112 is located, and then flow back to the side where the first through hole 111 is located, and flow out from the other first through hole 111. As a result, part of the refrigerant can flow to the side where the second through hole 112 is located, reducing the situation where the refrigerant directly flows out from the other first through hole 111 after entering from the first through hole 111, balancing the flow path and flow resistance, two factors that cause the flow distribution of the fluid, and the distribution of the refrigerant in the first circulation space 101 is relatively uniform, so that the interlayer temperature distribution between the first plate 10 and the second plate 20 is uniform, the heat exchange is uniform, and the heat exchange effect is good. In addition, the refrigerant can also be strongly disturbed by the first type of protrusions 113, the second type of protrusions 114 and the third type of protrusions 115, and the flow boundary layer and thermal boundary layer thickness of the fluid (refrigerant) are thinned, thereby achieving the purpose of strengthening heat exchange, and the heat exchange efficiency is high.

[0050] See also Figure 6 and Figure 7 The distribution and shape of the first type of protrusions 113, the second type of protrusions 114 and the third type of protrusions 115 have a great influence on the heat exchange performance and the pressure drop, which will be specifically described below with a preferred implementation method.

[0051] Optionally, a plurality of the first type protrusions 113 and the second type protrusions 114 are provided, and the plurality of first type protrusions 113 are arranged in an array on one side of the body portion 11 along the second direction, and the plurality of second type protrusions 114 are arranged in an array on the other side of the body portion 11 along the second direction. The first type protrusions 113 and the second type protrusions 114 are both in the shape of long strips, and the first type protrusions 113 and the second type protrusions 114 are arranged in an array on the other side of the body portion 11 along the second direction. Figure 7The central axis e) shown in is inclined toward each other. Among them, there is an angle α between the axis in the length direction of the first type of protrusion 113 and the axis in the length direction of the second type of protrusion 114, and the value range of α is 50°≤α≤130°. For example, the value of α can be 50°, 60°, 80°, 100°, 120° or 130°, etc. By controlling the value of α within the above range, the first type of protrusion 113 and the second type of protrusion 114 can provide good guidance for the flow of the fluid, so that the fluid can flow along the side wall in the width direction of the first type of protrusion 113 and the side wall in the width direction of the second type of protrusion 114, reducing flow resistance, reducing pressure drop, while increasing disturbance and enhancing heat exchange. If the value of α is less than 50°, the flow resistance of the first type protrusion 113 and the second type protrusion 114 to the fluid along the first direction increases, the pressure drop is large, and it is not conducive to enhancing heat exchange; if the value of α is greater than 130°, the first type protrusion 113 and the second type protrusion 114 have a poor guiding effect on the fluid, and the fluid is more distributed on the side where the first through hole 111 is located, and less distributed on the side where the second through hole 112 is located, which is not conducive to the uniformity of heat exchange and the heat exchange effect is poor.

[0052] Furthermore, along the second direction ( Figure 7 The distance between two adjacent first-type protrusions 113 and the distance between two adjacent second-type protrusions 114 are both L, and the value range of L is 1mm≤L≤6mm. For example, the value of L can be 1mm, 2mm, 3mm, 4mm, 5mm or 6mm. Along the first direction ( Figure 7 ), the distance between two adjacent first-type protrusions 113 and the distance between two adjacent second-type protrusions 114 are both W, and the value range of W is 2mm≤W≤11mm. For example, the value of W can be 2mm, 4mm, 6mm, 8mm, 10mm or 11mm. By controlling the values ​​of L and W within the above range, on the one hand, it is to enable the first-type protrusions 113 and the second-type protrusions 114 to guide the fluid well, so that the fluid can flow along the preset trajectory, ensuring that the fluid is evenly distributed in the first circulation space 101; on the other hand, it can also enhance the disturbance while relatively reducing the pressure drop and improving the heat exchange effect. Otherwise, when the values ​​of L and W are small, the first-type protrusions 113 and the second-type protrusions 114 have a large flow resistance to the fluid. Although the disturbance is severe, the pressure drop is obvious, which is not conducive to heat exchange; when the values ​​of L and W are large, the first-type protrusions 113 and the second-type protrusions 114 have a poor guiding effect on the fluid, and the fluid is unevenly distributed, which is not conducive to heat exchange.

[0053] Furthermore, in this embodiment, a third type of protrusion 115 is provided between the first type of protrusion 113 and the second type of protrusion 114, and a plurality of the third type of protrusions 115 are also provided, and the plurality of third type of protrusions 115 are arranged at intervals along the first direction. The distance between two adjacent third type of protrusions 115 is also W, and the value range of W is 2mm≤W≤11mm. By providing the third type of protrusion 115, the flow direction of the fluid can be changed, and the flow of the fluid can also be guided, so that the fluid changes from flowing toward the side where the second through hole 112 is located to flowing away from the side where the second through hole 112 is located, that is, after flowing out of one of the first through holes 111, it turns and enters another first through hole 111.

[0054] Optionally, the third type of protrusion 115 includes a first guide section 1151, a second guide section 1152 and a stop section 1153, wherein the first guide section 1151 and the second guide section 1152 are respectively connected to one end of the stop section 1153. The main body 11 includes two first side edges 1101 and two second side edges 1102 arranged opposite to each other, wherein the first side edge 1101 extends along the second direction, and the second side edge 1102 extends along the first direction, and the stop section 1153 is parallel to the first side edge 1101, and the first guide section 1151 and the second guide section 1152 are inclined toward each other compared to the axis e of the main body 11 along the first direction. Through the cooperation of the first guide section 1151, the second guide section 1152 and the stop section 1153, the fluid can flow along a preset track, which has a good guiding effect, and at the same time reduces the flow resistance and the pressure drop.

[0055] Exemplarily, the first guide segment 1151 and the second guide segment 1152 are both in the shape of long strips, and there is an angle β between the axis of the length direction of the first guide segment 1151 and the axis of the length direction of the second guide segment 1152, and the value range of β is 50°≤β≤130°. For example, the value of β can be 50°, 60°, 80°, 100°, 120° or 130°, etc. By controlling the value of β within the above range, the first guide segment 1151 and the second guide segment 1152 can provide good guidance for the flow of the fluid and reduce the flow resistance of the fluid. It should be noted that as a preferred solution, the value of β can be set to be equal to the value of α to make the flow of the fluid smoother.

[0056] Furthermore, the length of the stop section 1153 along the second direction is F, and the value range of F is 2mm≤F≤7mm. For example, the value of F can be 2mm, 3mm, 4mm, 5mm, 6mm or 7mm. By controlling the value of F within the above range, it is possible to avoid stagnation of the fluid at the third type of protrusion 115, thereby ensuring smoother flow of the fluid, less resistance in the fluid flow path, and less pressure drop. Otherwise, if the value of F is too small, the fluid is likely to stagnate at the third type of protrusion 115, resulting in greater resistance to the flow of the fluid and poor guiding effect; if the value of F is too large, the structural strength of the main body 11 is affected, and the processing and manufacturing accuracy is reduced, resulting in a low yield rate.

[0057] See 8 and Fig. 9 , along the third direction ( Figure 8 In the Z-axis direction shown in , that is, the thickness direction of the main body 11), the first type of protrusions 113, the second type of protrusions 114 and the third type of protrusions 115 have the same height, and the third direction is perpendicular to the first direction and the second direction. The heights of the first type of protrusions 113, the second type of protrusions 114 and the third type of protrusions 115 are all H, and the value range of H is 0.6mm≤H≤2mm. For example, the value of H can be 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm or 2.0mm, etc. By controlling the value of H within the above range, it can be ensured that the first circulation space 101 and the second circulation space 201 are sufficient, avoiding excessive flow resistance of the fluid in the first circulation space 101 or the second circulation space 201, and at the same time thinning the flow boundary layer and thermal boundary layer thickness of the fluid, thereby achieving the purpose of enhancing heat exchange.

[0058] Continue to see Figure 1-Figure 3 The plate heat exchanger in this embodiment includes an end plate 30 and a bottom plate 40, and a plurality of circulation plate assemblies are sandwiched between the end plate 30 and the bottom plate 40. The end plate 30 is provided with a first inlet 31 and a first outlet 32, and the first inlet 31 and the first outlet 32 ​​are both connected to the first circulation space 101; the end plate 30 is also provided with a second inlet 33 and a second outlet 34, and the second inlet 33 and the second outlet 34 are both connected to the second circulation space 201.

[0059] Taking the first circulation plate assembly close to the end plate 30 as an example, the second plate 20 of the first circulation plate assembly is adjacent to the end plate 30, and the second through hole 112 of the second plate 20 is circumferentially provided with an annular rib 1121. Along the third direction, the height of the annular rib 1121 is the same as the heights of the first type of protrusion 113, the second type of protrusion 114 and the third type of protrusion 115. The annular rib 1121 abuts against the end surface of the second inlet 33 or the second outlet 34 on the end plate 30 circumferentially close to the circulation plate assembly, thereby forming a connecting channel on the inner side of the connection position between the annular rib 1121 and the end plate 30, and the refrigerant can enter the first circulation space 101 through the connecting channel.

[0060] Further, see Figure 4 and Figure 5 , taking the first circulation plate assembly close to the end plate 30 as an example, the second plate 20 of the first circulation plate assembly is adjacent to the end plate 30, and the two first through holes 111 on the second plate 20 are respectively opposite to the first inlet 31 and the first outlet 32 ​​on the end plate 30 and are connected to each other. The second through hole 112 of the first plate 10 is circumferentially provided with an annular convex rib 1121, and the annular convex rib 1121 abuts against the end surface of the first through hole 111 on the second plate 20 in the circumferential direction close to the first plate 10, thereby forming a connecting channel on the inner side of the connecting position between the annular convex rib 1121 and the main body 11 of the second plate 20, and the coolant can enter the second circulation space 201 through the connecting channel.

[0061] Optionally, the plate heat exchanger further comprises a mounting plate 50, a coolant inlet joint, a coolant outlet joint, a refrigerant inlet joint 331 and a refrigerant outlet joint 341, and the mounting plate 50 is provided with four through holes 51, and the coolant inlet joint passes through the mounting plate 50 in the width direction ( Figure 1 The coolant outlet connector passes through the mounting plate 50 in the width direction (in the Y-axis direction shown in FIG. 1 ) and is connected to the first inlet 31 on the end plate 30. Figure 1 The refrigerant inlet connector 331 passes through the mounting plate 50 in the width direction (Y-axis direction shown in FIG. 1 ) and is connected to the first outlet 32 ​​on the end plate 30; Figure 1 The refrigerant outlet connector 341 passes through the mounting plate 50 in the width direction (Y-axis direction shown in FIG. 1 ) and is connected to the second inlet 33 on the end plate 30. Figure 1 The other through hole 51 on the second side (in the Y-axis direction shown in FIG. 1 ) is connected to the second outlet 34 on the end plate 30. At this time, the refrigerant and the coolant are discharged from the plate heat exchanger in the length direction (in the Y-axis direction shown in FIG. 1 ). Figure 1 The first circulation space 101 and the second circulation space 201 are entered from the same side (in the X-axis direction shown in FIG. 1 ) respectively.

[0062] Of course, in other embodiments, the coolant inlet joint and the coolant outlet joint may be exchanged, and the refrigerant and the coolant enter the first circulation space 101 and the second circulation space 201 from both sides of the length direction of the plate heat exchanger, respectively, and the refrigerant and the coolant are in countercurrent heat exchange. Alternatively, the refrigerant inlet joint 331 and the refrigerant outlet joint 341 may be exchanged, and the refrigerant and the coolant also enter the first circulation space 101 and the second circulation space 201 from both sides of the length direction of the plate heat exchanger, respectively, and the refrigerant and the coolant are in countercurrent heat exchange.

[0063] Furthermore, the mounting plate 50 is provided with a plurality of fixing holes 52, which can be used to mount the plate heat exchanger 50. For example, bolts or screws are passed through the fixing holes 52 and then threadedly connected to the vehicle frame, thereby integrating the plate heat exchanger on the vehicle.

[0064] Continue to see Figure 1 In this embodiment, the end plate 30, the bottom plate 40, the main body 11 of the first plate 10, and the main body 11 of the second plate 20 are all provided with connecting parts 12 in the circumferential direction. The end plate 30, the first plate 10, the second plate 20 and the bottom plate 40 are stacked in an up-and-down manner, and the mounting plate 50 is placed above the end plate 30. The above parts are assembled and pressed and then sent into a brazing furnace. After high-temperature brazing, the solder on the surface of each part melts and flows to the gaps between adjacent parts through capillary action to fill the gaps. After that, the solder cools and solidifies to firmly connect the various parts together to form a plate heat exchanger product.

[0065] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0066] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A plate heat exchanger, characterized in that: include: A circulation plate assembly, the circulation plate assembly comprising a first plate (10) and a second plate (20) of the same structure, the second plate (20) being stacked with the first plate (10) after being rotated 180 degrees, and a first circulation space (101) capable of accommodating fluid flow is formed between the first plate (10) and the second plate (20); the circulation plate assembly is provided in plurality, the plurality of circulation plate assemblies being stacked in sequence, and a second circulation space (201) capable of accommodating fluid flow is formed between two adjacent circulation plate assemblies, and the first circulation space (101) and the second circulation space (201) are not connected to each other; The first plate (10) has a rectangular main body (11); two first through holes (111) are provided on one side of the main body (11) along a first direction; two second through holes (112) are provided on the other side of the main body (11) along the first direction; the first through holes (111) and the second through holes (112) are both arranged close to a corner of the main body (11); a flow diversion protrusion is provided at the center of the main body (11); the flow diversion protrusion comprises a first type of protrusion (113), a second type of protrusion (114) and a third type of protrusion (115); the first type of protrusion (113), the second type of protrusion (114) and the third type of protrusion (115) divide the first circulation space (101) into a plurality of V-shaped flow channels; the two ends of the plurality of V-shaped flow channels are respectively connected to one of the first through holes (111).

2. The plate heat exchanger according to claim 1, characterized in that: The first type of protrusions (113) and the second type of protrusions (114) are both in the shape of long strips, and the first type of protrusions (113) and the second type of protrusions (114) are inclined towards each other along an axis e of the first direction relative to the main body (11); An included angle α is formed between the axis of the first type of protrusion (113) in the length direction and the axis of the second type of protrusion (114) in the length direction, and the value range of α is 50°≤α≤130°.

3. The plate heat exchanger according to claim 2, characterized in that: A plurality of the first-type protrusions (113) and a plurality of the second-type protrusions (114) are provided, the plurality of the first-type protrusions (113) are arranged in an array on one side of the main body (11) along the second direction, and the plurality of the second-type protrusions (114) are arranged in an array on the other side of the main body (11) along the second direction; Along the second direction, the distance between two adjacent protrusions (113) of the first type, and the distance between two adjacent protrusions (114) of the second type are both L, and the value range of L is 1mm≤L≤6mm.

4. The plate heat exchanger according to claim 3, characterized in that: Along the first direction, the distance between two adjacent protrusions (113) of the first type and the distance between two adjacent protrusions (114) of the second type are both W, and the value range of W is 2mm≤W≤11mm.

5. The plate heat exchanger according to claim 1, characterized in that: The third type protrusion (115) comprises a first guide segment (1151), a second guide segment (1152) and a stop segment (1153), wherein the first guide segment (1151) and the second guide segment (1152) are respectively connected to one end of the stop segment (1153); The main body (11) comprises two first side edges (1101) arranged opposite to each other and two second side edges (1102) arranged opposite to each other, the first side edges (1101) extending along the second direction, the second side edges (1102) extending along the first direction, the stop section (1153) being parallel to the first side edge (1101), and the first guide section (1151) and the second guide section (1152) being inclined towards each other relative to an axis e of the main body (11) along the first direction.

6. The plate heat exchanger according to claim 5, characterized in that: The first guide section (1151) and the second guide section (1152) are both in the shape of long strips, and an angle β is formed between the axis of the first guide section (1151) in the length direction and the axis of the second guide section (1152) in the length direction; The value range of β is 50°≤β≤130°.

7. The plate heat exchanger according to claim 1, characterized in that: Along the third direction, the first type of protrusions (113), the second type of protrusions (114) and the third type of protrusions (115) have the same height, and the third direction is perpendicular to both the first direction and the second direction; Along the third direction, the heights of the first type of protrusions (113), the second type of protrusions (114) and the third type of protrusions (115) are all H, and the value range of H is 0.6mm≤H≤2mm.

8. The plate heat exchanger according to claim 7, characterized in that: The plate heat exchanger comprises an end plate (30) and a bottom plate (40), and a plurality of the circulation plate assemblies are sandwiched between the end plate (30) and the bottom plate (40); the end plate (30) is provided with a first inlet (31) and a first outlet (32), and the first inlet (31) and the first outlet (32) are both connected to the first circulation space (101); the end plate (30) is also provided with a second inlet (33) and a second outlet (34), and the second inlet (33) and the second outlet (34) are both connected to the second circulation space (201).

9. The plate heat exchanger according to claim 1, characterized in that: An annular convex rib (1121) is provided in the circumference of the second through hole (112) of the first plate (10), and the annular convex rib (1121) abuts against the main body (11) in the circumference of the first through hole (111) of the adjacent second plate (20), and the inner side of the connection position between the annular convex rib (1121) and the main body (11) forms a communicating channel.

10. The plate heat exchanger according to claim 1, characterized in that: A connecting portion (12) is provided in the circumferential direction of the main body portion (11), and two connecting portions (12) stacked up and down are connected by welding.

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