Heat exchange plate assembly and heat exchanger

Abstract

The utility model relates to a heat exchange plate assembly and a heat exchanger, and belongs to the technical field of heat exchange equipment, the heat exchange plate assembly comprises a group of first heat exchange plates and a group of second heat exchange plates, and the first heat exchange plates and the second heat exchange plates are alternately stacked, so that first layered spaces and second layered spaces which are alternately arranged are formed between the adjacent heat exchange plates; the first heat exchange plate and the second heat exchange plate are each provided with a first liquid inlet and a first liquid outlet, and the first heat exchange plate and the second heat exchange plate are each provided with two second liquid inlets and a second liquid outlet. After entering the heat exchange plate assembly, a water body and a refrigerant flow into each layered space in a staggered manner for heat exchange, and the layered space corresponding to the refrigerant is provided with two liquid inlets and one liquid outlet, so that the flow uniformity of the refrigerant at each part of the heat exchange plate assembly can be improved, the flow resistance is reduced, the enough heat exchange area is ensured, and the heat exchange effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange equipment, and particularly relates to a heat exchange plate assembly and a heat exchanger. Background Art

[0002] Plate heat exchangers are widely used in both industrial and residential applications, offering advantages such as high efficiency, compactness, and flexible structure. They transfer heat through multiple stacked heat exchange plates. Different fluids flow through distinct flow paths formed between the plates, ensuring isolation and effective heat exchange. Heat exchanger plates can be customized based on factors such as fluid type, temperature requirements, and flow rate, making them widely used in industries such as air conditioning, chemicals, and petroleum.

[0003] However, existing plate heat exchangers have the problem of uneven flow in actual applications. Since the fluid at the heat exchange plate inlet contains more gas phase and has a large flow resistance, while the gas phase component of the fluid at the outlet is relatively small, traditional heat exchangers are prone to poor heat exchange due to this phenomenon. In addition, during the assembly process, the placement direction of the heat exchange plate may sometimes be incorrect, resulting in the fluid flow direction not being consistent with the design, further affecting the heat exchange effect and equipment performance. These problems not only reduce the overall efficiency of the heat exchanger, but may also increase the maintenance cost of the equipment and shorten its service life. Therefore, it is urgent to design a heat exchange plate assembly and heat exchanger with better heat exchange effect and less prone to assembly errors. Utility Model Content

[0004] The purpose of the present utility model is to provide a heat exchange plate assembly and a heat exchanger in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A heat exchange plate assembly includes a group of first heat exchange plates and a group of second heat exchange plates, characterized in that the first heat exchange plates and the second heat exchange plates are alternately stacked so that first layered spaces for the passage of a first fluid and second layered spaces for the passage of a second fluid are formed between adjacent heat exchange plates in an alternating arrangement. The first heat exchange plates and the second heat exchange plates are both provided with a first liquid inlet and a first liquid outlet, and the first liquid outlet and the first liquid inlet are located at different ends of the first heat exchange plate and the second heat exchange plate, and the first heat exchange plate and the second heat exchange plate are both provided with two second liquid inlets and one second liquid outlet, and the second liquid outlet and the second liquid inlet are located at different ends of the first heat exchange plate and the second heat exchange plate. The first fluid is water, and the second fluid is a refrigerant that carries heat. The first fluid is used to replace the heat absorbed by the refrigerant.

[0007] During the heat exchange process, water flows into the heat exchange plate assembly from the first liquid inlet on the top layer, and the refrigerant flows into the heat exchange plate assembly from the two second liquid inlets on the top layer. Afterwards, the refrigerant and water flow alternately into each layered space, exchange heat, and finally flow out from the first liquid outlet and the second liquid outlet on the top layer. There are two second liquid inlets, which makes the refrigerant flow on the front and back sides of the heat exchange plate assembly more uniform. Since the refrigerant at the second liquid inlet has more gaseous components, while the refrigerant at the second liquid outlet has less gaseous components, if only one second liquid inlet is provided, a large flow resistance is likely to be generated at the second liquid inlet. If two second liquid inlets are provided on the heat exchange plate, the flow resistance at the second liquid inlet can be reduced, making the flow rate at each location in the heat exchange plate assembly more uniform. And since the refrigerant at the second liquid outlet has less gaseous components, only one second liquid outlet is provided, which can increase the heat exchange area and further improve the heat exchange effect.

[0008] As a further optimization solution of the present invention, the first liquid inlet, the first liquid outlet, the second liquid inlet and the second liquid outlet are all waist holes.

[0009] As a further optimization scheme of the present invention, a first flange is provided at the edge of the first liquid inlet and the first liquid outlet, and the first flange is used to separate the first fluid from the second layered space. A second flange is provided at the edge of the second liquid inlet and the second liquid outlet, and the second flange is used to separate the second fluid from the first layered space.

[0010] As a further optimization solution of the present invention, a first notch is provided on the edge of the first heat exchange plate, a second notch is provided on the edge of the second heat exchange plate, and the second notch and the first notch are staggered with each other.

[0011] As a further optimization solution of the present invention, both the first heat exchange plate and the second heat exchange plate are provided with protruding ribs, and the protruding ribs are used to provide support for the heat exchange plates.

[0012] As a further optimization solution of the present invention, the inner sides of the first heat exchange plate and the second heat exchange plate are both provided with a plurality of corrugated grooves along the length direction, and the corrugated grooves have 2 to 14 folding angles.

[0013] As a further optimization solution of the present invention, the bending angle of the corrugated groove is within the range of 100° to 110°.

[0014] As a further optimization scheme of the present invention, a joint assembly is provided on one side of the heat exchange plate assembly, and the joint assembly includes a first liquid inlet joint and a first liquid outlet joint connected to the first layered space, and a second liquid inlet joint and a second liquid outlet joint connected to the second layered space.

[0015] A heat exchanger comprising a heat exchange plate assembly, the heat exchanger also comprising a joint assembly arranged on one side of the heat exchange plate assembly, the joint assembly comprising a first liquid inlet joint and a first liquid outlet joint communicating with the first layered space, and a second liquid inlet joint and a second liquid outlet joint communicating with the second layered space.

[0016] The beneficial effects of the present invention are:

[0017] 1) After the water and refrigerant enter the heat exchange plate assembly, the utility model flows into each layered space in a staggered manner and performs heat exchange. The layered space corresponding to the refrigerant has two liquid inlets and one liquid outlet, which can improve the uniformity of the refrigerant flow rate at each location of the heat exchange plate assembly and avoid the phenomenon of high flow resistance at the liquid inlet due to a large amount of gas phase components at the liquid inlet. Since the refrigerant gas phase components at the liquid outlet are relatively small, only one liquid outlet is provided, which can increase the heat exchange area and improve the heat exchange effect.

[0018] 2) The first liquid inlet, second liquid inlet, first liquid outlet and second liquid outlet of the first and second heat exchange plates are all configured as waist holes in the present invention, which can reduce the flow resistance at both ends of each layered space of the heat exchange plate assembly and further improve the heat exchange effect;

[0019] 3) The present invention provides staggered first and second notches on different sides of the edge of the first heat exchange plate and the edge of the second heat exchange plate. After the heat exchange plate assembly is stacked, the distribution of the notches can be observed or detected to determine whether the heat exchange plate assembly is in the wrong direction. This prevents the fluid flow direction from being inconsistent with the design due to incorrect placement.

[0020] 4) In the first layered space, the second flanges on the first and second heat exchange plates block the refrigerant, and in the second layered space, the first flanges on the first and second heat exchange plates abut against each other to block the water, thereby preventing the water and the refrigerant from mixing and ensuring smooth heat exchange.

[0021] 5) The utility model provides corrugated grooves along the length direction on the inner sides of the first heat exchange plate and the second heat exchange plate, and corrugated ridges corresponding to the corrugated grooves on the outer sides of the first heat exchange plate and the second heat exchange plate, which can increase the fluid heat exchange area and improve the heat exchange efficiency;

[0022] 6) The utility model provides two first protruding ribs and two second protruding ribs at the four corners of the heat exchange plate. The first protruding ribs and the second protruding ribs on adjacent heat exchange plates abut against each other. The abutting ribs are fixedly connected together after welding, which can reinforce the liquid inlet and the liquid outlet, and can improve the strength of the heat exchange plate assembly and the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the disassembled structure of the heat exchange plate assembly of the present utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the first heat exchange plate of the present invention;

[0025] Figure 3 This is a schematic diagram of the external structure of the first heat exchange plate of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the second heat exchange plate of the present invention;

[0027] Figure 5 This is a schematic diagram of the external structure of the second heat exchange plate of the present invention;

[0028] Figure 6 This is a schematic diagram of the assembly structure of the heat exchange plate assembly of the utility model;

[0029] Figure 7 yes Figure 6 Middle AA section view;

[0030] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0031] Figure 9 yes Figure 7 Enlarged view of point D in the middle;

[0032] Figure 10 yes Figure 6 Middle BB cross-section;

[0033] Figure 11 yes Figure 10 Enlarged view of point E in the middle;

[0034] Figure 12 yes Figure 11 Enlarged view of point F in the middle;

[0035] Figure 13 It is a schematic diagram of the overall structure of the heat exchanger of the present utility model.

[0036] In the figure: 1. first heat exchange plate; 2. second heat exchange plate; 3. first liquid inlet; 4. first liquid outlet; 5. second liquid inlet; 6. second liquid outlet; 7. first flange; 8. second flange; 9. first notch; 10. second notch; 11. first rib; 12. second rib; 13. corrugated groove; F1. first fluid; F2. second fluid; R1. first layered space; R2. second layered space; J. joint assembly; J1. first liquid inlet joint; J2. first liquid outlet joint; J3. second liquid inlet joint; J4. second liquid outlet joint; S. sealing assembly. DETAILED DESCRIPTION

[0037] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] First embodiment

[0039] like Figure 1 As shown, this embodiment relates to a heat exchange plate assembly comprising a plurality of heat exchange plates, each of which has a bottom wall and an edge surrounding the bottom wall. The heat exchange plates are divided into a group of first heat exchange plates 1 and a group of second heat exchange plates 2. In this embodiment, the number of first heat exchange plates 1 is the same as the number of second heat exchange plates 2. In other embodiments, an additional first heat exchange plate 1 or an additional second heat exchange plate 2 may be provided. When the heat exchange plate assembly is assembled, the first heat exchange plates 1 and the second heat exchange plates 2 are alternately stacked, forming alternating first layered spaces R1 for the passage of a first fluid F1 and second layered spaces R2 for the passage of a second fluid F2 between adjacent heat exchange plates. A first liquid inlet 3 and a first liquid outlet 4 are provided on each of the first heat exchange plate 1 and the second heat exchange plate 2, with the first liquid outlet 4 and the first liquid inlet 3 being located at different ends of the first heat exchange plate 1 and the second heat exchange plate 2. The first heat exchange plate 1 and the second heat exchange plate 2 are both provided with two second liquid inlets 5 and one second liquid outlet 6, and the second liquid outlet 6 and the second liquid inlet 5 are arranged at different ends of the first heat exchange plate 1 and the second heat exchange plate 2. Figure 1 From the perspective of FIG, the first liquid inlet 3 and the second liquid inlet 5 are located at the left end of the bottom wall of the heat exchange plate, and the first liquid outlet 4 and the second liquid outlet 6 are located at the right end of the bottom wall of the heat exchange plate.

[0040] The heat exchange plate assembly comprises a plurality of heat exchange plates, which are divided into a plurality of first heat exchange plates 1 and a plurality of second heat exchange plates 2. When assembling the heat exchange plate assembly, the first heat exchange plates 1 and the second heat exchange plates 2 are arranged alternately and stacked from bottom to top. After the edges of the heat exchange plates are fixed and sealed together, interlaced first layered spaces R1 and second layered spaces R2 are formed. The ends of each first layered space R1 are connected to a first liquid inlet 3 and a first liquid outlet 4, respectively. The ends of each second layered space R2 are connected to two second liquid inlets 5 and a second liquid outlet 6, respectively. The topmost heat exchange plate is connected to the heat exchanger connector, and the bottommost heat exchange plate is sealed. The heat exchange plate assembly can then be used for fluid heat exchange. The first fluid F1 is water, and the second fluid F2 is a heat-carrying refrigerant. The first fluid F1 is used to displace the heat absorbed by the refrigerant. In other embodiments, the first fluid F1 can also be replaced with other coolants.

[0041] During the heat exchange process, water flows into the heat exchange plate assembly from the topmost first liquid inlet 3, and refrigerant flows into the heat exchange plate assembly from the topmost two second liquid inlets 5. Within the heat exchange plate assembly, the water is divided into multiple streams corresponding to each first layered space R1. Each stream flows from the first liquid inlet 3 corresponding to the first layered space R1 to the first liquid outlet 4 corresponding to the first layered space R1, flows upward, and ultimately flows out of the heat exchange plate assembly through the topmost first liquid outlet 4. The refrigerant is also divided into multiple streams within the heat exchange plate assembly. These multiple streams correspond to each second layered space R2. Each stream flows from the second liquid inlet 5 corresponding to the second layered space R2 to the second liquid outlet 6 corresponding to the second layered space R2, flows upward, and ultimately flows out of the heat exchange plate assembly through the topmost second liquid outlet 6.

[0042] The water flow in the first layered space R1 absorbs the heat of the refrigerant in the adjacent second layered space R2, thereby achieving heat exchange. There are two second liquid inlets 5, which make the refrigerant flow on the front and rear sides of the heat exchange plate assembly more uniform. Since the refrigerant at the second liquid inlet 5 has more gaseous components, while the refrigerant at the second liquid outlet 6 has less gaseous components, when only one second liquid inlet 5 is provided, a large flow resistance is likely to be generated at the second liquid inlet 5. When two second liquid inlets 5 are provided on the heat exchange plate, the flow resistance at the second liquid inlet 5 can be reduced, making the flow at various locations in the heat exchange plate assembly more uniform. And since the refrigerant gaseous components at the second liquid outlet 6 are less, only one second liquid outlet 6 is provided, which can increase the heat exchange area and further improve the heat exchange effect.

[0043] Specifically, if Figure 2-5 As shown, the first liquid inlet 3, the first liquid outlet 4, the second liquid inlet 5, and the second liquid outlet 6 are all waist holes. The first liquid inlet 3 and the first liquid outlet 4 of the first heat exchange plate 1, as well as the first liquid inlet 3 and the first liquid outlet 4 of the second heat exchange plate 2, are all provided with a first flange 7, which is used to separate the first fluid F1 from the second layered space R2. The second liquid inlet 5 and the second liquid outlet 6 of the first heat exchange plate 1, as well as the second liquid inlet 5 and the second liquid outlet 6 of the second heat exchange plate 2, are all provided with a second flange 8, which is used to separate the second fluid F2 from the first layered space R1.

[0044] See also Figure 6-11The first flange 7 on the first heat exchange plate 1 is positioned downward, while the first flange 7 on the second heat exchange plate 2 is positioned upward. The two pairs of first flanges 7 on adjacent first and second heat exchange plates 1 and 2 abut against each other. The second flange 8 on the first heat exchange plate 1 is positioned upward, while the second flange 8 on the second heat exchange plate 2 is positioned downward. The two pairs of second flanges 8 on adjacent first and second heat exchange plates 1 and 2 abut against each other. Within the first layered space R1, the abutting second flanges 8 on the first and second heat exchange plates 1 and 2 block the refrigerant. Within the second layered space R2, the abutting first flanges 7 on the first and second heat exchange plates 1 and 2 block the water, preventing mixing of water and refrigerant and ensuring smooth heat exchange.

[0045] The inner sides of both the first and second heat exchange plates 1 and 2 are provided with a plurality of corrugated grooves 13 along their lengths. These grooves 13 have 2 to 14 bends. The bend angles of the corrugated grooves 13 range from 100° to 110°. The outer sides of the first and second heat exchange plates 1 and 2 are provided with corrugated ridges corresponding to the corrugated grooves 13. In this embodiment, the corrugated grooves 13 are preferably 14-fold grooves, each with a bend angle of preferably 105°. The corrugated grooves 13 and the corresponding corrugated ridges increase the fluid heat exchange area and improve heat exchange efficiency.

[0046] Furthermore, a first notch 9 is provided on the edge of the first heat exchange plate 1, and a second notch 10 is provided on the edge of the second heat exchange plate 2, and the second notch 10 and the first notch 9 are interlaced. It should be noted that in this embodiment, the second notch 10 is interlaced with the first notch 9 in both the length and width directions of the heat exchange plate. In other embodiments, the second notch 10 and the first notch 9 may be interlaced only in the length or width direction of the heat exchange plate. The interlaced first notches 9 and second notches 10 allow the distribution of the notches to be analyzed by observation or camera image recognition after the heat exchange plate assembly is stacked, and to determine whether the heat exchange plate assembly is incorrectly assembled, thereby avoiding fluid flow direction that is inconsistent with the design due to incorrect placement direction.

[0047] In addition, if Figure 6-11As shown, the first heat exchange plate 1 and the second heat exchange plate 2 are both provided with protruding ribs, and the protruding ribs are divided into first protruding ribs 11 and second protruding ribs 12. Specifically, two first protruding ribs 11 are provided on one side of the first heat exchange plate 1 and one side of the second heat exchange plate 2, and two second protruding ribs 12 are provided on the other side of the first heat exchange plate 1 and the second heat exchange plate 2. The two first protruding ribs 11 are respectively arranged adjacent to the first liquid inlet 3 and the first liquid outlet 4, and the first protruding ribs 11 are arranged opposite to the first flange 7. The two second protruding ribs 12 are respectively arranged adjacent to the second liquid inlet 5 and the second liquid outlet 6, and the second protruding ribs 12 are arranged opposite to the second flange 8. After fusion welding, the first protruding ribs 11 on the adjacent first heat exchange plates 1 and the second heat exchange plates 2 that are against each other are welded together, and the second protruding ribs 12 on the adjacent first heat exchange plates 1 and the second heat exchange plates 2 that are against each other are welded together. The first liquid inlet 3 and the first liquid outlet 4 as well as the second liquid inlet 5 and the second liquid outlet 6 are reinforced by the abutting first protruding ribs 11 and the abutting second protruding ribs 12, thereby improving the strength of the heat exchange plate assembly.

[0048] Second embodiment

[0049] This embodiment relates to a heat exchanger that includes the heat exchange plate assembly of the previous embodiment. The heat exchanger also includes a joint assembly J provided on one side of the heat exchange plate assembly, and a sealing assembly S provided on the other side of the heat exchange plate assembly. The sealing assembly S is a base that surrounds the edge of the bottom heat exchange plate from below. In some other embodiments, the sealing assembly S may also be other sealing structures that seal the bottom heat exchange plate, or a heat exchange plate without a liquid inlet and a liquid outlet. The edges of the heat exchange plates of the heat exchange assembly are fixed together by welding. The joint assembly J includes a first liquid inlet joint J1 connected to the first liquid inlet 3, a first liquid outlet joint J2 connected to the first liquid outlet 4, a second liquid inlet joint J3 connected to the two second liquid inlets 5, and a second liquid outlet joint J4 connected to the second liquid outlet 6. In this embodiment, the topmost heat exchange plate is the second heat exchange plate 2. The first liquid inlet joint J1, the first liquid outlet joint J2, the second liquid inlet joint J3, and the second liquid outlet joint J4 are all sealed and connected to an assembly plate. The edge of the assembly plate is welded to the edge of the topmost second heat exchange plate 2, and a gap is formed between the assembly plate and the second heat exchange plate 2. The lower end of the first liquid inlet joint J1 passes through the assembly plate and is welded to the first liquid inlet 3 of the topmost second heat exchange plate 2. The lower end of the first liquid outlet joint J2 passes through the assembly plate and is welded to the first liquid outlet 4 of the topmost second heat exchange plate 2. A gap is formed between the second liquid inlet joint J3 and the second liquid outlet joint J4 and the topmost second heat exchange plate 2. The first fluid F1 flows into the first liquid inlet joint J1 and flows out of the first liquid outlet joint J2. The second fluid F2 flows into the second liquid inlet joint J3 and flows out of the second liquid outlet joint J4.

[0050] In addition, in other embodiments, the topmost heat exchange plate may also be the first heat exchange plate 1. In this case, the second liquid inlet joint J3 and the second liquid outlet joint J4 are welded to the second liquid inlet 5 and the second liquid outlet 6, respectively. The internal flow channel of the second liquid inlet joint J3 is in an inverted Y shape, and is connected to the two second liquid inlets 5, respectively. A certain gap is formed between the first liquid inlet joint J1 and the first liquid outlet joint J2 and the first liquid inlet 3 and the first liquid outlet 4.

[0051] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A heat exchange plate assembly, comprising a set of first heat exchange plates (1) and a set of second heat exchange plates (2), characterized in that: The first heat exchange plates (1) and the second heat exchange plates (2) are stacked alternately, so that alternately arranged first layered spaces for the passage of the first fluid and second layered spaces for the passage of the second fluid are formed between adjacent heat exchange plates; The first heat exchange plate (1) and the second heat exchange plate (2) are both provided with a first liquid inlet (3) and a first liquid outlet (4), and the first liquid outlet (4) and the first liquid inlet (3) are respectively arranged at different ends of the first heat exchange plate (1) and the second heat exchange plate (2); the first heat exchange plate (1) and the second heat exchange plate (2) are both provided with two second liquid inlets (5) and one second liquid outlet (6), and the second liquid outlet (6) and the second liquid inlet (5) are respectively arranged at different ends of the first heat exchange plate (1) and the second heat exchange plate (2).

2. The heat exchange plate assembly according to claim 1, characterized in that: The first liquid inlet (3), the first liquid outlet (4), the second liquid inlet (5) and the second liquid outlet (6) are all waist holes.

3. The heat exchange plate assembly according to claim 1, characterized in that: The first liquid inlet (3) and the first liquid outlet (4) are both provided with a first flange (7) at their edges, and the first flange (7) is used to separate the first fluid from the second layered space. The second liquid inlet (5) and the second liquid outlet (6) are both provided with a second flange (8) at their edges, and the second flange (8) is used to separate the second fluid from the first layered space.

4. The heat exchange plate assembly according to claim 1, characterized in that: A first notch (9) is provided on the edge of the first heat exchange plate (1), and a second notch (10) is provided on the edge of the second heat exchange plate (2), and the second notch (10) and the first notch (9) are staggered with each other.

5. The heat exchange plate assembly according to claim 1, characterized in that: Both the first heat exchange plate (1) and the second heat exchange plate (2) are provided with protruding ribs, and the protruding ribs are used to provide support for the heat exchange plates.

6. The heat exchange plate assembly according to claim 1, characterized in that: The inner sides of the first heat exchange plate (1) and the second heat exchange plate (2) are both provided with a plurality of corrugated grooves (13) along the length direction, and the corrugated grooves (13) have 2 to 14 folding angles.

7. The heat exchange plate assembly according to claim 6, characterized in that: The folding angle of the corrugated groove (13) is within the range of 100° to 110°.

8. A heat exchanger comprising the heat exchange plate assembly according to any one of claims 1 to 7, characterized in that: The heat exchanger also includes a joint assembly arranged on one side of the heat exchange plate assembly, and the joint assembly includes a first liquid inlet joint and a first liquid outlet joint communicating with the first layered space, and a second liquid inlet joint and a second liquid outlet joint communicating with the second layered space.

Images