Distributor and plate heat exchanger

Abstract

The utility model provides a distributor and a plate heat exchanger, and belongs to the technical field of heat exchangers. A distributor comprises a pipe body, baffles arranged at equal intervals are fixed in the pipe body so as to divide the interior of the pipe body into a plurality of distribution cavities, distribution holes communicated with the distribution cavities are formed in the surface of the pipe body, and independent distribution pipes corresponding to the distribution cavities in number are fixed in the pipe body in the length direction of the pipe body. The distribution pipes and the distribution cavities are in one-to-one correspondence and are communicated. The utility model has the advantage of good distribution effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, in particular to a distributor and a plate heat exchanger. Background Art

[0002] When the plate heat exchanger is used as an evaporator in a refrigeration system, the working flow of the heat exchanger is in a two-phase state. Due to the complexity and uncertainty of the two-phase flow, uneven fluid distribution will occur, making the heat exchange area unable to be fully utilized, affecting the overall performance of the heat exchanger.

[0003] Currently, the industry distributes refrigerants by opening a very small distribution hole at the liquid refrigerant inlet pipe between the plates. The very large resistance of the distribution hole reduces the small resistance unevenness between the plates.

[0004] According to actual use, the distribution can indeed be improved by throttling small holes, but the aperture of the throttling small holes is very small. If the distribution holes are blocked by copper brazing material or impurities in actual use, the heat exchange of the distribution channel will fail, reducing the service life of the heat exchanger.

[0005] When there is a problem with the distributor, the refrigeration performance of the unit will decrease, and it may also cause internal or external leakage, causing more serious harm. Summary of the invention

[0006] The purpose of the utility model is to solve the above problems in the prior art and to propose a distributor and a plate heat exchanger, which have the characteristics of good distribution effect.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A distributor comprises: a tube body, wherein baffles arranged at equal intervals are fixed inside the tube body to divide the tube body into a plurality of distribution cavities, distribution holes connected to the distribution cavities are opened on the surface of the tube body, and independent distribution tubes corresponding to the number of the distribution cavities are fixed inside the tube body along the length direction of the tube body, and the distribution tubes correspond to and are connected to the distribution cavities one by one.

[0009] In the above distributor, the distribution pipe includes an adjusting pipe and a delivery pipe, the adjusting pipe is connected to the delivery pipe, and each adjusting pipe has a different diameter and length so that the total resistance of each group of adjusting pipes and delivery pipes is approximately the same.

[0010] In the above distributor, an inlet connecting pipe is installed on the regulating pipe, and the regulating pipe is connected with the inlet connecting pipe.

[0011] In the above distributor, an inlet connecting pipe is fixed on the tube body, and the regulating pipe is connected to the inlet connecting pipe.

[0012] In the above-mentioned dispenser, the dispensing holes are arranged at the middle positions of the corresponding dispensing cavities.

[0013] A plate heat exchanger, comprising:

[0014] A plate body, which has an inter-plate channel for passing a refrigerant and a corner hole structure communicated with the inter-plate channel, and the corner hole structure has a dispensing inlet communicated with the inter-plate channel one by one;

[0015] A dispenser, which is inserted and installed in the corner hole structure, and the dispensing holes of the dispenser correspond to at least one dispensing inlet.

[0016] In the above-mentioned plate heat exchanger, each of the dispensing holes corresponds to 3-5 dispensing inlets, and the number of dispensing inlets corresponding to each dispensing hole remains the same.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] In the present application, after the refrigerant enters the pipe body, since baffles are fixedly arranged at equal intervals in the pipe body, it is separated into a plurality of dispensing cavities. Each dispensing cavity corresponds to and is communicated with an independent dispensing pipe one by one. The refrigerant can enter the corresponding dispensing cavity through the dispensing holes formed on the surface of the pipe body and communicated with the dispensing cavity, and then be dispensed and output through the dispensing pipe, so that the refrigerant can directly enter the corresponding dispensing cavity through the dispensing pipe, and the refrigerant can be distributed more evenly, reducing the problem that the heat exchange area cannot be fully utilized due to uneven distribution of the refrigerant, thereby improving the overall performance of equipment such as plate heat exchangers. Description of the Drawings

[0019] Figure 1 is a three-dimensional structure diagram of a dispenser in the present application;

[0020] Figure 2 is a cross-sectional structure diagram of a dispenser in the present application;

[0021] Figure 3 is a three-dimensional structure diagram of a dispenser with the pipe body removed in the present application;

[0022] Figure 4 is a schematic diagram of another embodiment of a dispenser in the present application;

[0023] Figure 5 is a three-dimensional structure diagram of a plate heat exchanger in the present application;

[0024] Figure 6 is a partial cross-sectional structure diagram of a plate heat exchanger in the present application.

[0025] In the figures,

[0026] 100, plate body; 101, passage between plates; 102, corner hole structure; 103, distribution inlet; 200, distributor;

[0027] 2, pipe body; 21, baffle; 22, distribution cavity; 23, distribution hole;

[0028] 3, distribution pipe; 31, adjusting pipe; 32, conveying pipe;

[0029] 4, inlet connection. Detailed implementation manner

[0030] The following combines the attached Figures 1 - 6 drawings and specific embodiments to further illustrate the present application:

[0031] First of all, it should be noted here that in the description of the present application, if there are orientation words such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present application; in addition, digital quantifiers such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the present application, unless otherwise clearly specified and limited, if there are terms such as "installation", "connection", "connection", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an interference fit, a transition fit and other limiting connections, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium; therefore, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] As Figures 1 to 4 shown, a distributor 200 includes: a pipe body 2, in which baffles 21 are fixedly arranged at equal intervals to divide the inside of the pipe body 2 into a plurality of distribution cavities 22, distribution holes 23 communicating with the distribution cavities 22 are opened on the surface of the pipe body 2, and along the length direction of the pipe body 2, distribution pipes 3 corresponding to the number of distribution cavities 22 and independent are fixedly arranged in the pipe body 2, and the distribution pipes 3 correspond to and communicate with the distribution cavities 22 one by one.

[0033] In this application, after the refrigerant enters the pipe body 2, since baffles 21 are fixedly arranged at equal intervals in the pipe body 2, it is separated into multiple distribution cavities 22. Each distribution cavity 22 corresponds to and communicates with an independent distribution pipe 3 one by one. The refrigerant can enter the corresponding distribution cavity 22 through the distribution holes 23 opened on the surface of the pipe body 2 and communicating with the distribution cavity 22, and then be distributed and output through the distribution pipe 3, so that the refrigerant can directly enter the corresponding distribution cavity 22 through the distribution pipe 3, and the refrigerant can be distributed more evenly, reducing the problem that the heat exchange area cannot be fully utilized due to uneven refrigerant distribution, thereby improving the overall performance of equipment such as plate heat exchangers.

[0034] The existing distribution hole 23 technology requires a very large pressure drop to achieve uniform flow. When a special system such as a fluorine pump system itself cannot provide enough power to overcome the pressure drop, the performance cannot be ensured. However, the structure of this patent can greatly reduce the pressure drop of the plate heat exchanger, with a wider application range. Even in a low-power system, effective distribution can still be achieved.

[0035] This structure realizes the integrated production and installation of the distribution pipe 3 assembly, without the need to process small holes on the plate of the heat exchanger. The operation and installation are simple, which is a very big improvement in terms of processing reliability and use reliability. It can avoid the defects of the existing technology, thereby ensuring the consistency of the product and maximizing the product reliability for customers.

[0036] Specifically, as Figure 2 、 Figure 3 、 Figure 4 shown, the distribution pipe 3 includes an adjustment pipe 31 and a delivery pipe 32. The adjustment pipe 31 is connected to the delivery pipe 32. The pipe diameters and lengths of each adjustment pipe 31 are different, so that the total resistance of each group of adjustment pipes 31 and delivery pipes 32 is approximately the same.

[0037] Due to the uniform pressure drop of the refrigerant through the adjustment pipe 31 at the inlet, the refrigerant flow rates entering the distribution pipe 3 are equal. And each distribution pipe 3 directly delivers the refrigerant to the specified distribution cavity 22, and the refrigerant distribution in each cavity is uniform. The pipe diameters and lengths of the adjustment pipes 31 in the figure are only schematic diagrams and are adjusted according to the actual situation in actual production.

[0038] Specifically, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 shown, an inlet connection pipe 4 is installed on the adjustment pipe 31, and the adjustment pipe 31 is communicated with the inlet connection pipe 4.

[0039] The inlet connection pipe 4 can facilitate the user to directly connect the external connection pipe.

[0040] Specifically, asFigure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown in Figure 6 , an inlet connection pipe 4 is fixed on the pipe body 2, and the regulating pipe 31 is communicated with the inlet connection pipe 4.

[0041] The inlet connection pipe 4 can facilitate the user to directly connect an external connection pipe.

[0042] Specifically, the distribution holes 23 are arranged at the middle position of the corresponding distribution cavities 22.

[0043] As Figures 5 to 6 shown, a plate heat exchanger includes: a plate body 100 and a distributor 200. The plate body 100 has an inter-plate channel 101 for passing a refrigerant, and a corner hole structure 102 communicated with the inter-plate channel 101. The corner hole structure 102 has a distribution inlet 103 communicated with the inter-plate channel 101 one by one; the distributor 200 is inserted and installed in the corner hole structure 102, and the distribution holes 23 of the distributor 200 correspond to at least one distribution inlet 103.

[0044] The refrigerant enters the plate heat exchanger through the distributor 200. The distributor 200 is inserted and installed in the corner hole structure 102 of the plate body 100. The refrigerant first enters the pipe body 2 of the distributor 200 and is separated into a plurality of distribution cavities 22 by baffles 21 arranged at equal intervals in the pipe body 2. Then, the refrigerant passes through the distribution holes 23 located at the middle position of the distribution cavities 22 on the surface of the pipe body 2 and enters the inter-plate channel 101 corresponding to at least one distribution inlet 103 of the corner hole structure 102 of the plate body 100. In the inter-plate channel 101, processes such as heat exchange of the refrigerant are carried out.

[0045] The pipe body 2 of the distributor 200 can be subsequently welded to the plate heat exchanger.

[0046] Specifically, each distribution hole 23 corresponds to 3 - 5 distribution inlets 103, and the number of distribution inlets 103 corresponding to each distribution hole 23 remains the same.

[0047] For the distribution cavities 22 composed of the baffles 21, the distribution holes 23 of each channel correspond to 3 - 5 refrigerant flow channels. Because the number of flow channels is small, the refrigerant can be evenly distributed.

[0048] It should be noted that: the above embodiments are only used to illustrate the present application and do not limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the technical field can still modify the present application or make equivalent substitutions, and all technical solutions and their improvements that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A dispenser, characterized in that, Comprising: A tube body (2), in which baffles (21) are fixedly arranged at equidistant intervals to divide the interior of the tube body (2) into a plurality of distribution cavities (22). Distribution holes (23) communicating with the distribution cavities (22) are formed on the surface of the tube body (2). Along the length direction of the tube body (2), distribution pipes (3) corresponding to the number of the distribution cavities (22) and independent thereof are fixedly arranged in the tube body (2), and the distribution pipes (3) are in one-to-one correspondence and communication with the distribution cavities (22).

2. The dispenser according to claim 1, wherein The distribution pipe (3) comprises an adjustment pipe (31) and a delivery pipe (32). The adjustment pipe (31) is connected to the delivery pipe (32). The pipe diameters and lengths of each adjustment pipe (31) are different, so that the total resistance of each group of the adjustment pipe (31) and the delivery pipe (32) is substantially the same.

3. The dispenser according to claim 2, characterized in that, An inlet connection pipe (4) is installed on the adjustment pipe (31), and the adjustment pipe (31) is in communication with the inlet connection pipe (4).

4. The dispenser according to claim 2, wherein The inlet connection pipe (4) is fixedly arranged on the tube body (2), and the adjustment pipe (31) is in communication with the inlet connection pipe (4).

5. The dispenser according to claim 1, characterized in that, The distribution holes (23) are arranged at the middle positions of the corresponding distribution cavities (22).

6. A plate heat exchanger, characterized in that, Comprising: A plate body (100), which has an inter-plate channel (101) for passing refrigerant and a corner hole structure (102) communicating with the inter-plate channel (101). The corner hole structure (102) has distribution inlets (103) in one-to-one communication with the inter-plate channel (101). The distributor according to any one of claims 1-5, the distributor (200) is inserted and installed in the corner hole structure (102), and the distribution holes (23) of the distributor (200) correspond to at least one distribution inlet (103).

7. The plate heat exchanger according to claim 6, wherein Each distribution hole (23) corresponds to 3-5 distribution inlets (103), and the number of distribution inlets (103) corresponding to each distribution hole (23) is kept consistent.

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