Plate heat exchanger with branches
By introducing flow guide plates and flow dividers into the plate heat exchanger, the problem of large pressure drop of high-flow-rate refrigerant liquid was solved, the pressure drop was reduced, the structure was simplified, and the cost was reduced.
Patent Information
- Application Number
- CN202511806099.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-01-20
AI Technical Summary
Existing plate heat exchangers have a large pressure drop when the refrigerant liquid with high flow rate and high viscosity flows, which leads to an increase in pump cost and size. Increasing the number of plates will waste heat transfer performance and increase costs.
A flow guide plate is installed on the front and/or rear plates of the plate heat exchanger. The medium flows directly to the outlet through the diversion groove on the flow guide plate. Some of the medium does not exchange heat with the medium on the other side. The flow rate is adjusted by the flow guide plate and the diversion gasket to reduce the pressure drop.
It achieves reduced pressure drop while ensuring heat exchange efficiency, reduces manufacturing costs and structural complexity, and simplifies the installation process.
Smart Images
Figure CN121363882A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of refrigeration equipment, and relates to a heat exchanger, in particular to a plate heat exchanger with a branch. BACKGROUND
[0002] The brazed plate heat exchanger is generally used on a liquid cooling temperature control unit, and is divided into a compression refrigeration system and a cold carrier circulating system on the structure of the energy storage liquid cooling temperature control unit. The two systems perform heat exchange between refrigerant and cold carrier liquid through the plate heat exchanger. The plate heat exchanger is internally provided with complex channels formed by front and rear plates, and fluid flows in the channels in a rotating three-dimensional manner, and has the characteristics of small volume and high heat transfer.
[0003] Most of the energy storage liquid cooling temperature control units adopt a design mode of small temperature difference (2℃ or less) and large flow of cold carrier liquid. With the increase of the refrigerating capacity of a single energy storage liquid cooling temperature control unit, the flow of the cold carrier liquid in the system also increases. The cold carrier liquid with high viscosity and large flow enters the plate heat exchanger and flows in the small flow channel formed by the heat exchange plates. While performing heat exchange with the low-temperature refrigerant on the other side, the fluid capacity is also consumed, and a large pressure loss is generated. It is relatively inconvenient to adjust the specification parameters of the cold carrier circulating pump, and the high pressure drop of the plate heat exchanger increases the cost and volume of the water pump, which is not conducive to the design of the unit. Designers tend to reduce the pressure drop of the plate heat exchanger.
[0004] For a plate heat exchanger of a fixed plate type, the pressure drop is positively correlated with the flow rate in the channel. In the existing scheme, the liquid side pressure drop of the plate heat exchanger is reduced by increasing the number of plates and increasing the flow channel to reduce the flow rate in the channel. However, after the number of plates in the heat exchanger is increased, the heat transfer performance parameters of the heat exchanger are greatly exceeded. For the heat exchanger itself, there is a waste of performance, and the cost is relatively high and the volume is relatively large.
[0005] In the existing scheme, a branch is designed in the pipeline to reduce the water flow through the heat exchanger, but another pipe is assembled to assemble the branch during assembly, and the structure is complex and the cost is relatively high. SUMMARY
[0006] To solve the above problems in the prior art, the application provides a plate heat exchanger with a branch, which is simple and reliable in structure and reduces the pressure drop of the plate heat exchanger.
[0007] To achieve the above object, the present application provides the following technical scheme: a plate heat exchanger with branch, comprising a front end plate, a rear end plate, a plate assembly and a connecting pipe, the front end plate, the plate assembly and the rear end plate are sequentially brazed and fixed from front to back, four corner holes are formed on the front end plate and / or the rear end plate, and a flow guide branch plate is fixed on one side of the front end plate and / or the rear end plate, the upper and lower corner holes on the other side of the front end plate and / or the rear end plate are communicated and fixed with the connecting pipe, the upper and lower holes of the flow guide branch plate are communicated and fixed with the connecting pipe through the holes on the upper and lower sides of the flow guide branch plate, a flow distribution groove is arranged in the middle of the flow guide branch plate, and the cross section of the flow distribution groove is trapezoidal.
[0008] Further, a flow distribution gasket is arranged in the flow guide branch plate, and the flow distribution gasket is fixed at one end of the flow distribution groove.
[0009] Further, the size of the upper and lower holes of the flow guide branch plate is consistent with the size of the corresponding corner holes on the front end plate and / or the rear end plate.
[0010] Compared with the prior art, the present application has the following beneficial effects: by arranging the flow guide branch plate at the inlet and outlet of a medium, a part of the medium entering the heat exchanger through the inlet exchanges heat with another medium, and a part of the medium directly flows to the outlet through the flow distribution groove on the flow guide branch plate without exchanging heat with another medium, so that the medium entering the heat exchanger and the medium passing through the flow guide branch plate are converged at the outlet, thereby achieving the purpose of medium flow distribution and reducing pressure drop; the present application further arranges the flow distribution gasket in the flow guide branch plate, and adjusts the flow amount of the medium through the thickness of the flow distribution gasket, thereby achieving the required pressure drop. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 Fig. 1 is a structure schematic view of the flow guide branch plate of the present application installed in the front end plate; Figure 2 Fig. 2 is a structure schematic view of the flow guide branch plate of the present application installed in the rear end plate; Figure 3 Fig. 3 is a structure schematic view of the flow guide branch plate and the connecting pipe of the present application; Figure 4 Fig. 4 is a structure schematic view of the front end plate of the present application; Figure 5 Fig. 5 is a sectional view of one end of the flow distribution groove of the present application. DETAILED DESCRIPTION
[0012] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0013] Please refer toFigures 1-5 The technical scheme provided by the application is as follows: a plate heat exchanger with a branch, comprising a front end plate 7, a rear end plate 8, a plate assembly 9 and a connecting pipe, the front end plate 7, the plate assembly 9 and the rear end plate 8 are sequentially brazed and fixed from front to back, four corner holes are formed in the front end plate 7 and / or the rear end plate 8, and a flow guide branch plate 4 is fixed on one side of the front end plate 7 and / or the rear end plate 8, the sizes of the upper and lower corner holes on one side of the front end plate 7 and / or the rear end plate 8 are consistent, the flow guide branch plate 4 is formed by stamping a stainless steel plate, and the flow guide branch plate 4 is used for flow distribution, thereby reducing the pressure drop in the heat exchanger, the upper and lower corner holes on the other side of the front end plate 7 and / or the rear end plate 8 are fixedly connected with the connecting pipe, the flow guide branch plate 4 is provided with holes 11 corresponding to the corner holes on one side of the front end plate 7 and / or the rear end plate 8, the upper and lower sides of the flow guide branch plate 4 are fixedly connected with the connecting pipe through the holes 11, and a flow distribution groove 3 is arranged in the middle of the flow guide branch plate 4, the flow distribution groove 3 is pressed by a mold, and the cross section of the flow distribution groove 3 is trapezoidal, and the flow distribution groove 3 has the characteristics of wide flow channel and stable structure.
[0014] In the embodiment, the flow guide branch plate 4 is arranged on the front end plate 7 and the rear end plate 8, a primary side medium inlet 1 is arranged at the upper right corner of the front end plate 7, a primary side medium outlet 2 is arranged at the lower right corner of the front end plate 7, a secondary side medium inlet 5 is arranged at the lower left corner of the front end plate 7, a secondary side medium outlet 6 is arranged at the upper left corner of the front end plate 7, a primary side medium inlet 1 is arranged at the upper left corner of the rear end plate 8, a primary side medium outlet 2 is arranged at the lower left corner of the rear end plate 8, a secondary side medium inlet 5 is arranged at the lower right corner of the rear end plate 8, and a secondary side medium outlet 6 is arranged at the upper right corner of the rear end plate 8, the flow guide branch plate 4 is fixed on the right side of the front end plate 7 and the left side of the rear end plate 8, the front end plate 7 and the rear end plate 8 sequentially cover the flow guide branch plate 4 and the connecting pipe on the primary side, and are integrally connected by welding, at this time, the holes 11 on the flow guide branch plate 4 correspond to the upper and lower corner holes on the primary side of the front end plate 7 and the rear end plate 8, and the upper and lower corner holes on the secondary side of the front end plate 7 and the rear end plate 8 are directly welded with the connecting pipe.
[0015] The medium flow principle of the application is as follows: when a medium passes through the primary side medium inlet 1, part of the medium sequentially passes through the connecting pipe, the hole 11 and the corner hole, thereby entering the heat exchanger to exchange heat with the secondary side medium, and the other part of the medium sequentially passes through the connecting pipe, the hole 11 and the flow distribution groove 3, thereby directly flowing to the primary side medium outlet 2, and finally the two parts of the medium are combined at the primary side medium outlet 2. The application reduces the flow of the medium entering the flow channel inside the heat exchanger through the interception of the branch, thereby reducing the operating pressure drop. The application can greatly reduce the manufacturing cost on the basis of ensuring the heat exchange efficiency, and has the advantages of simple and reliable structure, no need for fluid distribution three-way pipes outside, convenient structure design and installation, and saving of external pipelines.
[0016] Specifically, the flow guide branch plate 4 is internally provided with a shunt gasket 10, the shunt gasket 10 is fixed at one end of the shunt groove 3, the shunt gasket 10 is fixed at one end close to the primary side medium inlet 1, the shunt gasket 10 is a stainless steel flat plate, and its function is to adjust the flow distribution, and its thickness is set according to the required pressure drop of the heat exchanger; the shunt gasket 10 with different thicknesses has different flow adjusting capabilities, and after fluid simulation simulation, the corresponding thickness value under specific working conditions can be determined. The heat exchange products under different heat exchange conditions can be matched with different shunt gaskets 10, thereby improving the use range of the products and reducing the adaptability work.
[0017] Specifically, the size of the upper and lower holes 11 of the flow guide branch plate 4 is consistent with the size of the corresponding angular holes of the front end plate 7 and / or the rear end plate 8, and in the embodiment, the size of the upper and lower holes 11 of the flow guide branch plate 4 is consistent with the size of the upper and lower angular holes of the primary side of the front end plate 7 and the rear end plate 8, which is conducive to assembly and sealing.
[0018] The flow guide branch plate 4 in the application can also be assembled on the front end plate 7 or the rear end plate 8, and of course, the flow guide branch plate 4 can also be assembled on both the front end plate 7 and the rear end plate 8 as in the embodiment.
[0019] Finally, it should be noted that: the above is only the preferred embodiment of the application and is not used to limit the application, although the application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.
Claims
1. A plate heat exchanger with branches, comprising a front end plate (7), a rear end plate (8), a plate pack (9) and connections, which front end plate (7), plate pack (9) and rear end plate (8) are brazed in order from front to back, characterised in that The front end plate (7) and / or rear end plate (8) is provided with four corner holes and is fixed with a flow guide branch plate (4) on one side, the upper and lower corner holes on the other side of the front end plate (7) and / or rear end plate (8) are communicated and fixed with the connecting pipe, the flow guide branch plate (4) is provided with holes (11) on the upper and lower sides, which are matched with the corner holes on one side of the front end plate (7) and / or rear end plate (8), the upper and lower sides of the flow guide branch plate (4) are communicated and fixed with the connecting pipe through the holes (11), and the flow guide branch plate (4) is provided with a shunt groove (3) in the middle.
2. A plate heat exchanger with branches according to claim 1, characterized in that The flow guide branch plate (4) is provided with a shunt gasket (10) inside, and the shunt gasket (10) is fixed at one end of the shunt groove (3).
3. A plate heat exchanger with branches according to claim 1, characterized in that The size of the upper and lower holes (11) of the flow guide branch plate (4) is consistent with the size of the corresponding corner holes on the front end plate (7) and / or rear end plate (8).