Fluid uniform distribution device for heat exchanger and plate heat exchanger thereof

Abstract

The utility model provides a fluid uniform distribution device for a heat exchanger and a plate heat exchanger thereof, and belongs to the technical field of heat exchanger equipment. A fluid uniform distribution device for a heat exchanger comprises a distribution pipe, the distribution pipe is provided with a distribution channel, the distribution pipe is provided with a pipe body and a limiting ring part, and the pipe body is provided with a plurality of distribution holes communicated with the distribution channel; the pipe body is used for being inserted into a corner hole structure of the plate heat exchanger, and the distribution holes can correspond to and communicate with inlets of refrigerant channels in the plate heat exchanger one to one. The distribution structure has the advantages that different charging amounts of the same refrigerant and the like have different adaptation requirements on the size of the distribution structure.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchanger equipment, and in particular to a fluid distribution device for heat exchangers and its plate heat exchanger. Background Technology

[0002] Plate heat exchangers consist of several heat exchange plates pressed with special design patterns. Multiple inter-plate channels are formed between the heat exchange plates. The medium flowing in the inter-plate channels exchanges heat through the middle plates. The heat exchanger has the characteristics of high heat transfer efficiency, compact structure, low heat loss and small footprint. It is widely used in refrigeration and air conditioning, heat pumps, energy storage and other fields.

[0003] The refrigerant flows into the heat exchanger from the inlet and then into the channels between the plates. Typically, a distributor is designed at the refrigerant inlet to evenly distribute the refrigerant into each channel, maximizing the utilization of the heat transfer area and ensuring uniform heat exchange. Under normal operating conditions, the refrigerant enters the heat exchanger in a gas-liquid two-phase state. Current technology usually employs a throttling structure designed on the plates to control the flow rate of the refrigerant entering each channel through primary throttling. However, theoretically, different types of refrigerants, different states of the same refrigerant, and different charge amounts of the same refrigerant all require different sizes of distribution structures. Currently, the distribution structure designed on the plates is integrated with the plates themselves. If different distributor structures and sizes are needed, the plates must be redesigned and molded, resulting in high costs and making it impractical. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a fluid distribution device for heat exchangers and its plate heat exchanger, which solves the problem that different refrigerant charge amounts require different sizes of the distribution structure for adaptation.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A fluid distribution device for a heat exchanger includes: a distribution pipe, the distribution pipe having a distribution channel, the distribution pipe having a pipe body and a limiting ring, the pipe body having a plurality of distribution holes communicating with the distribution channel, wherein the pipe body is used to insert into the corner hole structure of a plate heat exchanger, and the distribution holes are able to correspond one-to-one with and communicate with the inlet of the refrigerant flow channel in the plate heat exchanger.

[0007] In the above-mentioned fluid distribution device for heat exchangers, a limiting notch is provided on the limiting ring.

[0008] In the fluid distribution device for the heat exchanger described above, the distribution holes on the tube body are of the same size.

[0009] In the above-mentioned fluid distribution device for heat exchangers, the size of the distribution holes on the tube body decreases sequentially along the refrigerant flow direction.

[0010] In the above-mentioned fluid distribution device for heat exchangers, the limiting ring is formed by flanging one end of the tube body.

[0011] In the above-mentioned fluid distribution device for heat exchangers, the distribution pipe also has an inlet pipe, and the pipe body, the inlet pipe and the limiting ring are integrally structured.

[0012] A plate heat exchanger, comprising:

[0013] A heat exchange plate bundle, wherein the heat exchange plate bundle has alternating refrigerant flow channels and coolant flow channels, the heat exchange plate bundle has a corner hole structure that penetrates the heat exchange plate bundle and communicates with the refrigerant flow channels, and a limiting part is provided on the heat exchange plate bundle;

[0014] A fluid distribution device includes a distribution pipe. The pipe body is inserted into the corner hole structure, and the distribution holes on the pipe body correspond one-to-one with and communicate with the inlets of the refrigerant flow channels in the heat exchange plate bundle. The limiting notch of the limiting ring engages with the limiting part to position the distribution holes of the pipe body.

[0015] The heat exchanger consists of a top plate and a bottom plate. The bottom plate is fixed to one side of the heat exchanger plate bundle and closes the corner hole structure. The top plate is fixed to the other side of the heat exchanger plate bundle. The bottom plate has a recessed hole corresponding to the corner hole structure, and the top plate has an inlet hole corresponding to the corner hole structure. The tube is inserted into the corner hole structure and the recessed hole to restrict the radial movement of the tube. The inlet hole communicates with the distribution channel. The limiting ring is located between the top plate and the heat exchanger plate bundle.

[0016] The plate heat exchanger described above also includes a liquid inlet pipe, which is inserted into the inlet hole.

[0017] In the above-mentioned plate heat exchanger, the limiting ring is welded and fixed to the heat exchange plate bundle.

[0018] A plate heat exchanger, comprising:

[0019] A heat exchange plate bundle, the heat exchange plate bundle having alternately arranged refrigerant flow channels and coolant flow channels, the heat exchange plate bundle having corner hole structures penetrating the heat exchange plate bundle and communicating with the refrigerant flow channels, and

[0020] A fluid distribution device includes a distribution pipe, the pipe body of which is inserted into the corner hole structure, and the distribution holes on the pipe body correspond one-to-one with and are connected to the inlets of the refrigerant flow channels in the heat exchange plate bundle; and

[0021] The top plate and bottom plate are provided. The bottom plate is fixed to one side of the heat exchange plate bundle and closes the corner hole structure. The top plate is fixed to the other side of the heat exchange plate bundle. The bottom plate has a recessed hole corresponding to the corner hole structure. The top plate has an inlet hole corresponding to the corner hole structure. The tube body is inserted into the inlet hole, the corner hole structure, and the recessed hole to restrict the radial movement of the tube body. The limiting ring of the distribution tube is located on the side of the top plate away from the heat exchange plate bundle.

[0022] In the above-mentioned plate heat exchanger, the limiting ring is welded and fixed to the top plate.

[0023] In the above-mentioned plate heat exchanger, the center line of the distribution hole and the corner hole structure are connected, and the connection line forms an angle α with the length direction of the heat exchange plate bundle, and the angle α is 0-90°.

[0024] Compared with the prior art, this application has the following advantages:

[0025] In this application, a separate fluid distribution device is designed. According to different types of refrigerants, different states of the same refrigerant, different charge amounts of the same refrigerant, etc., distribution holes of corresponding sizes are opened on the distribution pipe. The fluid distribution device is inserted into the existing plate heat exchanger, thereby realizing the adjustment of various situations such as different types of refrigerants, different states of the same refrigerant, and different charge amounts of the same refrigerant. There is no need to redesign the plates and re-open the mold, which greatly reduces the cost. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the distribution pipe in the first embodiment of this application;

[0027] Figure 2 This is a three-dimensional structural diagram of the first embodiment of this application applied to a plate heat exchanger;

[0028] Figure 3 yes Figure 2 A magnified view of a specific area;

[0029] Figure 4 This is a three-dimensional structural diagram of the distribution pipe in the second embodiment of this application;

[0030] Figure 5 This is a three-dimensional structural diagram of the second embodiment of this application applied to a plate heat exchanger;

[0031] Figure 6 yes Figure 5 A magnified view of a specific area;

[0032] Figure 7 This is a structural diagram of the distribution pipe installed in the heat exchanger plate bundle in this application;

[0033] In the picture,

[0034] 2. Distribution pipe; 21. Pipe body; 211. Distribution channel; 212. Distribution hole; 22. Limiting ring; 221. Limiting notch; 23. Inlet pipe;

[0035] 3. Plate heat exchanger; 31. Heat exchange plate bundle; 311. Refrigerant flow channel; 312. Coolant flow channel; 313. Limiting part; 314. Corner hole structure;

[0036] 4. Top plate; 41. Inlet hole;

[0037] 5. Base plate; 51. Recessed hole. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 and Figure 4 As shown, a fluid distribution device for a plate heat exchanger 3 includes: a distribution pipe 2, a specific distribution channel 211, the distribution pipe 2 having a pipe body 21 and a limiting ring 22, and a plurality of distribution holes 212 communicating with the distribution channel 211 on the pipe body 21; wherein, the pipe body 21 is used to insert into the corner hole structure 314 of the plate heat exchanger 3, and the distribution holes 212 can correspond one-to-one with and communicate with the inlet of the refrigerant channel in the plate heat exchanger 3.

[0040] In this application, when the plate heat exchanger 3 is applied in refrigeration and other fields, it is often used as an evaporator. The refrigerant enters the refrigerant channel of the plate heat exchanger 3 in a gas-liquid two-phase flow state. In order to achieve uniform distribution of the gas-liquid two-phase refrigerant in different refrigerant channels and maximize the utilization of the heat exchange area, the refrigerant channel inlet is usually designed with a distribution structure. After the plates are stacked, they generally form throttling orifices or throttling slits to control the pressure change of the fluid, thereby controlling the distribution of fluid flow in different channels. However, theoretically, different types of refrigerants, different states of the same refrigerant, and different charge amounts of the same refrigerant have different adaptation requirements for the size of the distribution structure. However, the distribution structure currently designed on the plate is integrated with the plate. If different distributor structures and sizes need to be adapted, the plates need to be redesigned and molded, which is costly and not feasible.

[0041] In this application, a separate fluid distribution device is designed. According to different types of refrigerants, different states of the same refrigerant, different charge amounts of the same refrigerant, etc., distribution holes 212 of corresponding sizes are opened on the distribution pipe 2. The fluid distribution device is inserted into the existing plate heat exchanger 3, thereby realizing the adjustment of various situations such as different types of refrigerants, different states of the same refrigerant, and different charge amounts of the same refrigerant. There is no need to redesign the plates and re-open the mold, which greatly reduces the cost.

[0042] The working principle of this application is to insert the distribution pipe 2 into the corner hole structure 314 of the plate heat exchanger 3 and lower it to replace the traditional distributor. The refrigerant flows into the distribution channel 211 and is distributed through the distribution hole 212, thereby achieving the effect of the traditional distributor. If the plate heat exchanger 3 itself has a distributor, then after inserting the distribution pipe 2, an additional throttling effect can be achieved. The distribution hole 212 performs one throttling, while the distributor performs a second throttling.

[0043] Specifically, a limit notch 221 is provided on the limit ring 22.

[0044] Specifically, the distribution holes 212 on the tube body 21 are of the same size.

[0045] The plate heat exchanger 3 itself does not have a distributor; the distribution function is accomplished solely by the distribution pipe 2, and the distribution holes 212 on the distribution pipe 2 are all the same size.

[0046] Specifically, the size of the distribution hole 212 on the tube body 21 decreases sequentially along the refrigerant flow direction.

[0047] Because there are unavoidable phase differences and flow non-uniformity between the end and the front of the distribution channel 211, in order to achieve the adjustability of the distribution, the diameter of the distribution hole 212 on the distribution pipe 2 decreases sequentially along the flow direction.

[0048] Specifically, the limiting ring 22 is formed by flanging one end of the tube body 21.

[0049] Specifically, the distribution pipe 2 also has an integrated structure of inlet pipe 23, pipe body 21, inlet pipe 23 and limiting ring 22.

[0050] like Figure 2 and Figure 3As shown, a plate heat exchanger 3 includes: a heat exchange plate bundle 31, a fluid distribution device, a top plate 4, and a bottom plate 5. The heat exchange plate bundle 31 has alternating refrigerant channels 311 and coolant channels 312. The heat exchange plate bundle 31 has a corner hole structure 314 that penetrates the heat exchange plate bundle 31 and communicates with the refrigerant channels 311. A limiting part 313 is provided on the heat exchange plate bundle 31. The fluid distribution device has a distribution pipe 2. The pipe body 21 of the distribution pipe 2 is inserted into the corner hole structure 314, and the distribution holes 212 on the pipe body 21 correspond one-to-one with and communicate with the inlets of the refrigerant channels in the heat exchange plate bundle 31. A limiting ring is provided. The limiting notch 221 of tube 22 engages with the limiting part 313 to position the distribution hole 212 of tube 21. The bottom plate 5 is fixed to one side of the heat exchange plate bundle 31 and closes the corner hole structure 314. The top plate 4 is fixed to the other side of the heat exchange plate bundle 31. The bottom plate 5 has a recessed hole 51 corresponding to the corner hole structure 314. The top plate 4 has an inlet hole 41 corresponding to the corner hole structure 314. Tube 21 is inserted into the corner hole structure 314 and the recessed hole 51 to restrict the radial movement of tube 21. The inlet hole 41 is connected to the distribution channel 211. The limiting ring part 22 is located between the top plate 4 and the heat exchange plate bundle 31.

[0051] In this application, after the pipe body 21 of the distribution pipe 2 in the fluid distribution device is inserted into the corner hole structure 314, the limiting notch 221 on the limiting ring 22 engages with the limiting part 313 to accurately position the distribution hole 212 on the pipe body 21, avoiding incorrect angle installation during installation. After installation, the distribution hole 212 on the distribution pipe 2 can directly access the refrigerant channel. By inserting the lower end of the pipe body 21 into the recessed hole 51, one end of the pipe body 21 can be positioned. Subsequently, the distribution pipe 2 and the heat exchange plate bundle 31 are fixed by welding the limiting ring 22 to them. After fixing, the distribution pipe 2 can be used as a distributor.

[0052] Specifically, it also includes a liquid inlet connector, which is inserted into the inlet hole 41.

[0053] The design features a separate distribution pipe 2 and inlet pipe, making it easier to install the distribution pipe 2.

[0054] like Figure 5 and Figure 6As shown, a plate heat exchanger 3 includes: a heat exchange plate bundle 31, a fluid distribution device, a top plate 4, and a bottom plate 5. The heat exchange plate bundle 31 has alternating refrigerant channels 311 and coolant channels 312. The heat exchange plate bundle 31 has a corner hole structure 314 that penetrates the heat exchange plate bundle 31 and communicates with the refrigerant channels 311. The fluid distribution device has a distribution pipe 2, the pipe body 21 of which is inserted into the corner hole structure 314, and the distribution hole 212 on the pipe body 21 communicates with the refrigerant channels in the heat exchange plate bundle 31. The inlets are connected and correspond one-to-one; the bottom plate 5 is fixed to one side of the heat exchange plate bundle 31 and the corner hole structure 314 is closed, the top plate 4 is fixed to the other side of the heat exchange plate bundle 31, the bottom plate 5 is provided with a recessed hole 51 corresponding to the corner hole structure 314, the top plate 4 is provided with an inlet hole 41 corresponding to the corner hole structure 314, the tube body 21 is inserted into the inlet hole 41, the corner hole structure 314 and the recessed hole 51 to restrict the radial movement of the tube body 21, and the limiting ring part 22 of the distribution pipe 2 is located on the side of the top plate 4 away from the heat exchange plate bundle 31.

[0055] In this application, after the pipe body 21 of the distribution pipe 2 in the fluid distribution device is inserted into the corner hole structure 314, the limiting notch 221 on the limiting ring 22 engages with the limiting part 313 to accurately position the distribution hole 212 on the pipe body 21, avoiding incorrect angle installation during installation. After installation, the distribution hole 212 on the distribution pipe 2 can directly access the refrigerant channel. By inserting the lower end of the pipe body 21 into the recessed hole 51, one end of the pipe body 21 can be positioned. Subsequently, the limiting ring 22 is welded and fixed to the top plate 4, thereby fixing the distribution pipe 2 and the heat exchange plate bundle 31. After fixing, the distribution pipe 2 can be used as a distributor.

[0056] Specifically, such as Figure 7 As shown, the center line of the distribution hole 212 and the corner hole structure 314 are connected, and the connecting line forms an angle α with the length direction of the heat exchange plate bundle 31. The angle α is 0-90°. The angle α can be 20°, 30°, 40°, 50°, 60°, or 70°.

[0057] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture, as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0058] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0059] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0060] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A fluid distribution device for a heat exchanger, characterized in that, include: The distribution pipe (2) has a specific distribution channel (211). The distribution pipe (2) has a pipe body (21) and a limiting ring (22). The pipe body (21) has a plurality of distribution holes (212) that communicate with the distribution channel (211). The pipe body (21) is used to insert into the corner hole structure (314) of the plate heat exchanger (3), and the distribution holes (212) can correspond one-to-one with and communicate with the inlet of the refrigerant channel in the plate heat exchanger (3).

2. The fluid distribution device for heat exchangers according to claim 1, characterized in that, A limiting notch (221) is provided on the limiting ring (22).

3. The fluid distribution device for heat exchangers according to claim 2, characterized in that, The size of the distribution hole (212) on the tube body (21) decreases sequentially along the refrigerant flow direction.

4. The fluid distribution device for a heat exchanger according to any one of claims 2-3, characterized in that, The limiting ring (22) is formed by flanging one end of the tube (21).

5. The fluid distribution device for heat exchangers according to any one of claims 1-3, characterized in that, The distribution pipe (2) also has an inlet pipe (23), and the pipe body (21), the inlet pipe (23) and the limiting ring (22) are an integral structure.

6. A plate heat exchanger, characterized in that, include: A heat exchange plate bundle (31) has alternating refrigerant channels (311) and coolant channels (312), and has a corner hole structure (314) that penetrates the heat exchange plate bundle (31) and communicates with the refrigerant channels (311). A limiting part (313) is provided on the heat exchange plate bundle (31). The fluid distribution device according to any one of claims 2-3 has a distribution pipe (2), the pipe body (21) of the distribution pipe (2) is inserted into the corner hole structure (314), and the distribution hole (212) on the pipe body (21) corresponds to and is connected to the inlet of the refrigerant channel in the heat exchange plate bundle (31). The limiting notch (221) of the limiting ring (22) is engaged with the limiting part (313) to position the distribution hole (212) of the pipe body (21). The top plate (4) and the bottom plate (5) are fixed on one side of the heat exchange plate bundle (31) and close the corner hole structure (314). The top plate (4) is fixed on the other side of the heat exchange plate bundle (31). The bottom plate (5) has a recessed hole (51) corresponding to the corner hole structure (314). The top plate (4) has an inlet hole (41) corresponding to the corner hole structure (314). The tube body (21) is inserted into the corner hole structure (314) and the recessed hole (51) to restrict the radial movement of the tube body (21). The inlet hole (41) is connected to the distribution channel (211). The limiting ring (22) is located between the top plate (4) and the heat exchange plate bundle (31).

7. The plate heat exchanger according to claim 6, characterized in that, It also includes a liquid inlet connector, which is inserted into the inlet hole (41).

8. The plate heat exchanger according to claim 6, characterized in that, The limiting ring (22) is welded and fixed to the heat exchange plate bundle (31).

9. A plate heat exchanger, characterized in that, include: A heat exchange plate bundle (31) having alternating refrigerant channels (311) and coolant channels (312), the heat exchange plate bundle (31) having a corner hole structure (314) penetrating the heat exchange plate bundle (31) and communicating with the refrigerant channels (311), and The fluid distribution device according to claim 5 has a distribution pipe (2), the pipe body (21) of the distribution pipe (2) is inserted into the corner hole structure (314), and the distribution hole (212) on the pipe body (21) corresponds to and is connected to the inlet of the refrigerant channel in the heat exchange plate bundle (31); The top plate (4) and the bottom plate (5) are fixed on one side of the heat exchange plate bundle (31) and the corner hole structure (314) is closed. The top plate (4) is fixed on the other side of the heat exchange plate bundle (31). The bottom plate (5) has a recessed hole (51) corresponding to the corner hole structure (314). The top plate (4) has an inlet hole (41) corresponding to the corner hole structure (314). The tube body (21) is inserted into the inlet hole (41), the corner hole structure (314) and the recessed hole (51) to restrict the radial movement of the tube body (21). The limiting ring (22) of the distribution pipe (2) is located on the side of the top plate (4) away from the heat exchange plate bundle (31).

10. The plate heat exchanger according to claim 9, characterized in that, The limiting ring (22) is welded and fixed to the top plate (4).

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