Plate heat exchanger and distributor

Abstract

The invention provides a plate heat exchanger which is provided with an inlet, a first channel and a second channel, the inlet communicates with the first channel, the first channel communicates with the second channel, and the second channel communicates with a distribution flow channel; the plate heat exchanger comprises a first partition part and a second partition part, and at least part of the first partition part is separated from the second partition part; the first partition part and the second partition part are both partial walls of the distribution flow channel, the first partition part is partial walls of the first channel, and the second partition part is partial walls of the second channel; in the first direction, the first channel and the second channel are located on the two sides of the distribution flow channel respectively. The first channel and the second channel are additionally arranged in the plate heat exchanger, part of fluid enters the second channel from the first channel and then enters the distribution flow channel from the second channel to be distributed, the flowing path of the fluid to the distribution flow channel is increased, the accumulation phenomenon of the fluid at the tail end of the distribution flow channel is relieved, and the distribution uniformity of a refrigerant is improved.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and in particular to a plate heat exchanger and distributor applicable to refrigeration, heating, power, chemical, petroleum, and pharmaceutical industries. Background Technology

[0002] Plate heat exchangers are devices used to transfer heat between different fluids, playing a vital role in industrial production, energy utilization, and environmental control. A plate heat exchanger consists of multiple plates stacked to form multiple inter-plate channels. Fluids at different temperatures flow into these channels from the outside of the heat exchanger, exchanging heat through the temperature differences between the plates. To improve the heat exchange uniformity of the plate heat exchanger, distribution channels are installed at the fluid inlet of the plates. The flow cross-section of these distribution channels can gradually decrease, reducing the formation of vortex zones in the refrigerant at the end of the distribution section, thereby improving the uniformity of fluid distribution across the multiple inter-plate channels. However, the installation of these distribution channels can cause accumulation of fluids with significant phase differences between the gas and liquid phases at the end of the distribution channels, further affecting the uniformity of fluid distribution. Summary of the Invention

[0003] Therefore, this application provides a plate heat exchanger, including a plurality of plates stacked along the height direction of the plate heat exchanger. The plate heat exchanger has a distribution channel, a first inter-plate channel, and at least two second inter-plate channels, all of which are connected to the distribution channel. The plate heat exchanger has an inlet, a first channel, and a second channel. The inlet is connected to the first channel, the first channel is connected to the second channel, and the second channel is connected to the distribution channel. The plate heat exchanger includes a first partition and a second partition, the first partition being at least partially separated from the second partition. Both the first partition and the second partition are partial walls of the distribution channel, the first partition being a partial wall of the first channel, and the second partition being a partial wall of the second channel. The plate heat exchanger has a first direction perpendicular to the height direction of the plate heat exchanger, and along the first direction, the first channel and the second channel are located on opposite sides of the distribution channel.

[0004] The plate heat exchanger includes a distribution channel, a first channel, and a second channel. The first channel and the second channel are connected, and the second channel is connected to the distribution channel. This allows some fluid to enter the second channel from the first channel and then enter the distribution channel for distribution. This increases the flow path of the fluid to the distribution channel, alleviates the accumulation of fluid at the end of the distribution channel, and improves the uniformity of fluid distribution.

[0005] This application provides a dispenser, including a housing, the dispenser having a dispensing channel, a second through hole, a first channel, and a dispensing hole, the dispensing channel communicating with the dispensing hole, the first channel communicating with the second channel, and the second channel communicating with the dispensing channel; the first partition and the second partition are both partial walls of the dispensing channel, the first partition being a partial wall of the first channel, and the second partition being a partial wall of the second channel; perpendicular to the height direction of the dispenser, the first channel and the second channel are respectively located on both sides of the dispensing channel.

[0006] The distributor includes a first channel and a second channel, which are connected. The second channel is connected to the distribution channel. Some fluid enters the second channel from the first channel and then enters the distribution channel from the second channel for distribution. This increases the flow path of the fluid from the first channel to the distribution channel, alleviates the accumulation of fluid at the end of the distribution channel, and improves the uniformity of fluid distribution. Attached Figure Description

[0007] Figure 1 A cross-sectional schematic diagram of a plate heat exchanger is provided for one embodiment of this application;

[0008] Figure 2 for Figure 1 A three-dimensional schematic diagram of the distributor;

[0009] Figure 3 for Figure 1 A cross-sectional view of the distributor;

[0010] Figure 4 for Figure 1 Explosion-proof diagram of the middle distributor;

[0011] Figure 5 for Figure 1 A cross-sectional view of the distributor from another angle;

[0012] Figure 6 A perspective view of a dispenser is provided for one embodiment of this application;

[0013] Figure 7 for Figure 6 Explosion-proof diagram of the middle distributor;

[0014] Figure 8 for Figure 6 A schematic diagram of the explosion from another angle of the distributor;

[0015] Figure 9 for Figure 6 Schematic diagram of the cross-section of the distributor;

[0016] Figure 10 for Figure 1A three-dimensional schematic diagram of the plug in a plate heat exchanger;

[0017] Figure 11 for Figure 1 An exploded view of the distributor in a plate heat exchanger. Detailed Implementation

[0018] To better understand the technical solution of this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0019] It should be understood that the described embodiments are only some embodiments of this application, and not all embodiments. Based on the technical solutions in this application, all other technical solutions obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] A plate heat exchanger includes multiple plates stacked to form multiple inter-plate channels. Fluids of different temperatures flow into these channels from the outside of the plate heat exchanger and exchange heat through the different temperatures of the plates. Specifically, the fluid is generally a refrigerant. In related plate heat exchangers, a distribution channel is provided at the refrigerant inlet of the plate. The flow cross-section of the distribution channel can gradually decrease to reduce the formation of a vortex region at the end of the distribution section, thereby improving the uniformity of refrigerant distribution to the multiple inter-plate channels. However, the distribution channel can cause refrigerant to accumulate at the end of the distribution channel, thus affecting the uniformity of refrigerant distribution. The plate heat exchanger 100 in this application includes multiple plates 101 stacked along the height direction H of the plate heat exchanger 100. The plate heat exchanger 100 has a distribution channel 2, a first inter-plate channel 102, and at least two second inter-plate channels 103, all of which are connected to the distribution channel 2. The plate heat exchanger 100 has an inlet 110, a first channel 3, and a second channel 4. The inlet 110 and the first channel 3 are connected, and the refrigerant enters the first channel 3 directly from the inlet 110. The first channel 3 and the second channel 4 are connected, and the second channel 4 is connected to the distribution channel 2.

[0021] The plate heat exchanger 100 includes a first partition 5 and a second partition 6, with the first partition 5 at least partially separated from the second partition 6. Both the first partition 5 and the second partition 6 are part of the wall of the distribution channel 2, with the first partition 6 being part of the wall of the first channel 3 and the second partition 6 being part of the wall of the second channel 4. The plate heat exchanger 100 has a first direction Y, which is perpendicular to the height direction H of the plate heat exchanger. Along the first direction Y, the first channel 100 and the second channel 100 are located on both sides of the distribution channel 2. The addition of the first channel 3 and the second channel 4 to the plate heat exchanger 100 allows the refrigerant to enter the second channel 4 from the first channel 3 and then enter the distribution channel 2 for distribution. This increases the flow path of the refrigerant to the distribution channel 2, alleviating the accumulation of refrigerant at the end of the distribution channel 2 and improving the uniformity of refrigerant distribution. In other words, the first channel 3, the second channel 4, and the distribution channel 2 are arranged side-by-side, not in an enclosing arrangement.

[0022] Specifically, in one embodiment, the plane perpendicular to the height direction H of the plate heat exchanger 100 is defined as the projection plane, and the first direction Y is parallel to the orthographic projection of the third partition 7 onto the projection plane. For example... Figure 3 As shown, the plate heat exchanger 100 includes a third partition 7, with the first partition 5 and the second partition 6 both connected to the third partition 7. At least a portion of the first partition 5 and at least a portion of the second partition 6 are separated from the third partition 7. The third partition 7 is a partial wall of the first channel 3 and a partial wall of the second channel 4. The first partition 5, the second partition 6, and the third partition 7 are at angles to each other. In another embodiment, as... Figure 1 and Figure 4 As shown, the first partition 5, the second partition 6, and the third partition 7 are all plate-shaped.

[0023] The plate heat exchanger 100 has a first through-hole 61 that penetrates the second partition 6 and connects the second channel 4 and the distribution channel 2; thus, refrigerant can flow into the distribution channel 2 from the second channel 4. The third partition 7 has a first hole 71 that connects the first channel 3 and the second channel 4. In this way, the refrigerant enters the first channel 3 from the inlet 110, enters the second channel 4 through the first hole 71, and then enters the distribution channel 2 through the first through-hole 61. Therefore, compared to the refrigerant directly entering the distribution channel 2, the flow path of the refrigerant into the distribution channel 2 is significantly longer.

[0024] To further improve the refrigerant flow path, in one embodiment, such as Figure 4 As shown, at least a portion of the first hole 71 is located away from the entrance 110 relative to the first through hole 61. The shapes of the first hole 71 and the first through hole 61 are not defined here.

[0025] In one implementation, such as Figure 2 and Figure 4 As shown, the plate heat exchanger 100 includes a plug 81 and a base plate 82. Along the height direction H of the plate heat exchanger, the plug 81 and the base plate 82 are located at both ends of the first partition 5. The shapes of the plug 81 and the base plate 82 are not defined here.

[0026] Wherein, plug 81 is a portion of the wall of inlet 110, plug 81 is a portion of the wall of the second channel 4, and plug 81 is a portion of the wall of the distribution channel 2; specifically, in one embodiment, as... Figure 10 As shown, the plug 81 includes a first wall surface 811, a second wall surface 812, and a third wall surface 813. The first wall surface 811 is part of the wall of the inlet 110, the second wall surface 812 is part of the wall of the second channel 4, and the third wall surface 813 is part of the wall of the distribution channel 2. The first partition 5 and the second partition 6 are both connected to the plug 81, and the first partition 5, the second partition 6, and the third partition 7 all abut against the plug 81. The first partition 5 and the second partition 6 are both connected to the base plate 82, and the first partition 5, the second partition 6, and the third partition 7 all abut against the plug 81. In one embodiment, as... Figure 5 As shown, the base plate 82 is part of the wall of the first hole 71.

[0027] In one implementation, such as Figure 5 As shown, along the height direction H of the plate heat exchanger 100, the distance between the plug 81 and the bottom plate 82 is h1. Further, as... Figure 10 and Figure 11 As shown, the plug 81 includes a fourth wall surface 814, which is away from the base plate 82 relative to the second wall surface 812. The base plate 82 includes a fifth wall surface 821 and a sixth wall surface 822, with the fifth wall surface 821 being away from the plug 81 relative to the sixth wall surface 822. The fifth wall surface 821 extends to the fourth wall surface 814. The height of the first hole 71 is h2. Further, as... Figure 5 As shown, h2 is the height of the first hole 71. In one embodiment, h2 < 1 / 3h1, which can increase the refrigerant flow path.

[0028] In one implementation, such as Figure X As shown, the flow area of ​​the first channel 3 is greater than or equal to the flow area of ​​the second channel 4, and the flow area of ​​the second channel 4 is greater than or equal to the flow area of ​​the distribution channel 2. Specifically, the flow surfaces of the first channel 3, the second channel 4, and the distribution channel 2 are all fan-shaped. In one embodiment, as shown... Figure 3 and Figure 4As shown, the first partition 5, the second partition 6, and the third partition 7 are integral parts. Furthermore, there are angles between the first partition 5, the second partition 6, and the third partition 7. Specifically, in one embodiment, the angle between the first partition 5 and the second partition 6, the angle between the second partition 6 and the third partition 7, and the angle between the third partition 7 and the first partition 5 can be 360°.

[0029] In one implementation, such as Figure 4 As shown, when the plate heat exchanger 100 has a first through hole 61, the first through hole 61 has a first height h3 along the height direction H of the plate heat exchanger 100, and the second partition 6 has a second height h4, wherein 60%h4≤h3≤95%h4; furthermore, the first through hole 61 can be circular, square or other shapes, and the first height h3 is the farthest distance of the first through hole 61 in the height direction H of the plate heat exchanger 100.

[0030] In another embodiment, such as Figure 4 As shown, the plate heat exchanger 100 has two or more first through holes 61. Along the height direction of the plate heat exchanger 100, the distance between the two first through holes 61 is a third height h5, wherein 60%h4≤h5≤95%h4. Specifically, along the height direction H of the plate heat exchanger 100, one of the two first through holes 61 is the first through hole 61 closest to the bottom plate 82, and the other is the first through hole 61 closest to the inlet 110.

[0031] In another embodiment, such as Figure 6 and Figure 7 As shown, the plane perpendicular to the height direction H of the plate heat exchanger 100 is defined as the projection plane. The first direction is parallel to the orthographic projection of the second partition 6 onto the projection plane. The first channel 3 and the second channel 4 are separate. Along the first direction, the distribution channel 2 is located between the first channel 3 and the second channel 4. In other words, the first channel 3 and the second channel 4 are not connected.

[0032] Specifically, such as Figure 7 As shown, the plate heat exchanger 100 includes a connecting block 83. The first partition 5 and the second partition 6 are both connected to the connecting block 83. The connecting block 83 is away from the inlet 110 relative to the first partition 5. The connecting block 83 is part of the wall of the distribution channel 2. The connecting block 83 is used to connect the first partition 5 and the second partition 6. On the other hand, the connecting block 83 plays a fixing role.

[0033] The connecting block 83 has a second hole 831, which connects the first channel 3 and the second channel 4. Specifically, as shown... Figure 8As shown, the connecting block 83 is connected to the base plate 82. The connecting block 83 is part of the wall of the second hole 831, and the base plate 82 is part of the wall of the second hole 831. In one embodiment, the connecting block 83 and the base plate 82 are an integral piece.

[0034] In one implementation, such as Figure 9 As shown, the first partition 5 and the second partition 6 are arranged in parallel; the first channel 3, the second channel 4, and the distribution channel 2 are arranged side by side and in parallel. At this time, the flow area of ​​the first channel 3 is equal to the flow area of ​​the second channel 4. The first partition 5 has a second through hole 51, and the second partition 6 has a first through hole 61. Refrigerant enters the first channel 3 from the inlet 110, part of the refrigerant enters the distribution channel 2 through the second through hole 51, and part of the refrigerant enters the second channel 4 through the second hole 831, and then enters the distribution channel 2 through the first through hole 61. This increases the flow path of the refrigerant into the distribution channel 2.

[0035] In one implementation, such as Figure 2 As shown, the plate heat exchanger 100 includes a distributor 9, which includes a housing 91, a first partition 5, and a second partition 6. Both the first partition 5 and the second partition 6 are located within the housing 91 and are connected to it. The housing 91 has a distribution hole 92, which connects the distribution channel 2 and the second inter-plate channel 103. The distributor 9 has a first channel 3, a second channel 4, and the distribution channel 2. The housing 91 forms part of the wall of the distribution channel 2, part of the wall of the first channel 3, and part of the wall of the second channel 4. Further, as... Figure 2 and Figure 3 As shown, the outer casing 91 is cylindrical and is sealed to the bottom plate 82. The bottom plate 82 is part of the wall of the first channel 3 and part of the wall of the second channel 4. In this case, the flow surfaces of the first channel 3, the second channel 4, and the distribution channel 2 can form a circle. In another embodiment, the connection between the outer casing 91 and the plug 81 is sealed.

[0036] In another embodiment, such as Figure 7 As shown, the first partition 5 has a second through hole 51, which connects the first channel 3 and the distribution channel 2. In this way, the refrigerant enters the first channel 3 through the inlet 110, and part of the refrigerant enters the distribution channel 2 through the second through hole 51 for distribution, thereby improving the refrigerant distribution efficiency.

[0037] When the first partition 5 and the second partition 6 are integrated, in order to promote the mixing of the two-phase refrigerant, in one embodiment, such as Figure 3As shown, the connection between the first partition 5 and the second partition 6 is a connecting part 567. The surface between the connecting part 567 and the distribution hole 92 is a first surface 5671. The first partition 5 and the second partition 6 have an included angle β. The bisector of the included angle β is a second surface 5672. The included angle between the first surface 5671 and the second surface 5672 is greater than or equal to 120°.

[0038] A dispenser 9 according to this application includes a housing 91. The dispenser 9 has a dispensing channel 2, a second through hole 51, a first channel 3, and a dispensing hole 92, with the dispensing hole 92 penetrating through the housing 91. The dispensing channel 2 communicates with the dispensing hole 92, the first channel 3 communicates with the second channel 4, and the second channel 4 communicates with the dispensing channel 2. The first partition 5 and the second partition 6 are both partial walls of the dispensing channel 2, with the first partition 5 being a partial wall of the first channel 3 and the second partition 6 being a partial wall of the second channel 4. Perpendicular to the height direction of the dispenser 9, the first channel 100 and the second channel 100 are located on both sides of the dispensing channel 2.

[0039] In one implementation, such as Figure 2 As shown, the number of distributing holes 92 can be multiple, and the multiple distributing holes are arranged along the height direction of the distributor 9, which is beneficial to improving the distributing efficiency. In another embodiment, multiple second through holes 51 are arranged along the height direction of the distributor 9, and multiple first through holes 61 are arranged along the height direction of the distributor 9.

[0040] In one implementation, such as Figure 4 As shown, the dispenser 9 has a groove 911 located inside the housing 91. The groove 911 is recessed from the housing 91 in a direction away from the connecting portion 567. There are multiple grooves 911. The grooves 911 are used for connecting the first dividing portion 5, the second dividing portion 6, and the third dividing portion 7 to the housing 91. The connection points between the first dividing portion 5, the second dividing portion 6, and the third dividing portion 7 and the housing 91 are located in the grooves 911. The plug 81 includes a snap-fit ​​portion 815, which is partially located in the groove 911. The groove 911 is used for connecting the plug 81 to the housing 91.

[0041] Although the technical solutions of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these technical solutions without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A plate heat exchanger (100) comprising a plurality of plates (101) stacked along the height direction of the plate heat exchanger (100), the plate heat exchanger (100) having a distribution channel (2), a first inter-plate channel (102) and at least two second inter-plate channels (103), the at least two second inter-plate channels (103) being in communication with the distribution channel (2), characterized in that: The plate heat exchanger (100) has an inlet (110), a first channel (3) and a second channel (4), the inlet (110) and the first channel (3) are connected, the first channel (3) and the second channel (4) are connected, and the second channel (4) is connected to the distribution channel (2); The plate heat exchanger (100) includes a first partition (5) and a second partition (6), wherein the first partition (5) is at least partially separated from the second partition (6); the first partition (5) and the second partition (6) are both part walls of the distribution channel (2), the first partition (5) is part wall of the first channel (3), and the second partition (6) is part wall of the second channel (4); The plate heat exchanger (100) has a first direction, which is perpendicular to the height direction of the plate heat exchanger (100). Along the first direction, the first channel (100) and the second channel (100) are located on both sides of the distribution channel (2).

2. The plate heat exchanger according to claim 1, characterized in that, The plate heat exchanger (100) includes a third partition (7), the first partition (5) and the second partition (6) are both connected to the third partition (7), the first partition (5) and the second partition (6) are at least partially separated from the third partition (7), the third partition (7) is a part of the wall of the first channel (3), and the third partition (7) is a part of the wall of the second channel (4); A plane perpendicular to the height direction of the plate heat exchanger (100) is defined as the projection plane, and the first direction is parallel to the orthographic projection of the third partition (7) on the projection plane; the plate heat exchanger (100) has a first through hole (61), the first through hole (61) penetrates the second partition (6), and the first through hole (61) connects the second channel (4) and the distribution channel (2); The third partition (7) has a first hole (71) that connects the first channel (3) and the second channel (4).

3. The plate heat exchanger according to claim 2, characterized in that, The flow surfaces of the first channel (3), the second channel (4), and the distribution channel (2) are all fan-shaped, and the first partition (5), the second partition (6), and the third partition (7) are integral parts.

4. The plate heat exchanger according to claim 2, characterized in that, Along the height direction of the plate heat exchanger (100), the first through hole (61) has a first height h3, and the second partition (6) has a first height h4, wherein 60%h4≤h3≤95%h4; Alternatively, the plate heat exchanger (100) has two or more first through holes (61), and the distance between two first through holes (61) along the height direction of the plate heat exchanger (100) is a third height h5, wherein 60%h4≤h5≤95%h4.

5. The plate heat exchanger according to claim 1, characterized in that, The plate heat exchanger (100) includes a plug (81) and a base plate (82). Along the height direction of the plate heat exchanger (100), the plug (81) and the base plate (82) are located at both ends of the first partition (5). The plug (81) is part of the wall of the inlet (110), part of the wall of the second channel (4), and part of the wall of the distribution channel (2). The first partition (5) and the second partition (6) are both connected to the plug (81), and the first partition (5) and the second partition (6) are both connected to the base plate (82); Along the height direction of the plate heat exchanger (100), the distance between the plug (81) and the bottom plate (82) is h1, and the height of the first hole (71) is h2, where h2 < 1 / 3h1.

6. The plate heat exchanger according to claim 1, characterized in that, The flow area of ​​the first channel (3) is greater than or equal to the flow area of ​​the second channel (4), and the flow area of ​​the second channel (4) is greater than or equal to the flow area of ​​the distribution channel (2).

7. The plate heat exchanger according to claim 1, characterized in that, The plane perpendicular to the height direction of the plate heat exchanger (100) is defined as the projection plane. The first direction is parallel to the orthographic projection of the second partition (6) on the projection plane. The first channel (3) and the second channel (4) are separated. Along the first direction, the distribution channel (2) is located between the first channel (3) and the second channel (4). The plate heat exchanger (100) includes a connecting block (83), the first partition (5) and the second partition (6) are both connected to the connecting block (83), the connecting block (83) is away from the inlet (110) relative to the first partition (5), and the connecting block (83) is part of the wall of the distribution channel (2); The connecting block (83) has a second hole (831) that connects the first channel (3) and the second channel (4).

8. The plate heat exchanger according to claim 7, characterized in that, The first partition (5) and the second partition (6) are arranged in parallel; The connecting block (83) is connected to the base plate (82), and the connecting block (83) and the base plate (82) are an integral part, and the base plate (82) is part of the wall of the second hole (831).

9. The plate heat exchanger according to any one of claims 1-8, characterized in that, The plate heat exchanger (100) includes a distributor (9), which includes a housing (91), a first partition (5), and a second partition (6). The first partition (5) and the second partition (6) are both located inside the housing (91) and are connected to the housing (91). The housing (91) has a distribution hole (92) that connects the distribution channel (2) to the second interplate channel (103). The dispenser (9) has a first channel (3), a second channel (4) and a dispensing channel (2), the outer shell (91) is a part of the wall of the dispensing channel (2), the outer shell (91) is a part of the wall of the first channel (3), and the outer shell (91) is a part of the wall of the second channel (4).

10. The plate heat exchanger according to claim 9, characterized in that, The outer shell (91) is cylindrical and is sealed to the bottom plate (82). The bottom plate (82) is part of the wall of the first channel (3). The first partition (5) has a second through hole (51) that connects the first channel (3) and the distribution channel (2). The first partition (5) and the second partition (6) are integral parts. The connection between the first partition (5) and the second partition (6) is a connecting part (567). A first surface (5671) is defined. The line connecting the connecting part (567) to the distribution hole (92) is located on the first surface (5671). There is an included angle β between the first partition (5) and the second partition (6). The angle bisector of the included angle β is the second surface (5672). The included angle between the first surface (5671) and the second surface (5672) is greater than or equal to 120°.

11. A dispenser, characterized in that, The dispenser (9) includes a housing (91), and has a dispensing channel (2), a second through hole (51), a first channel (3), and a dispensing hole (92). The dispensing channel (2) communicates with the dispensing hole (92), the first channel (3) communicates with the second channel (4), and the second channel (4) communicates with the dispensing channel (2). The first partition (5) and the second partition (6) are both partial walls of the dispensing channel (2), the first partition (5) is a partial wall of the first channel (3), and the second partition (6) is a partial wall of the second channel (4). Along a direction perpendicular to the height of the distributor (9), the first channel (100) and the second channel (100) are located on both sides of the distribution channel (2).

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