Brazed plate heat exchanger

Abstract

The utility model discloses a brazed plate heat exchanger which comprises a brazed plate heat exchanger body, the side face of the brazed plate heat exchanger body is communicated with a liquid inlet pipe opening and a liquid outlet pipe opening, and an inner processing pipe is fixed to an inner side flange of the liquid inlet pipe opening. The end, stretching into the liquid inlet pipe opening, of the inner treatment pipe is connected with a filtering cover, the outer side of the end, stretching into the liquid inlet pipe opening, of the inner treatment pipe is connected with a sealing gasket b in an adhesive mode, and the inner side of the liquid inlet pipe opening is connected with a sealing gasket a in an adhesive mode. According to the brazed plate heat exchanger, fluid is guided and conveyed through the guide cover, the fluid is sprayed out of the water spraying pipe, the spraying force pushes the fan blades, the fan blades drive the guide cover to rotate, and therefore the cleaning scraper is driven to rotate, the filter cover is continuously scraped and cleaned, the blockage phenomenon is avoided, and the flowing efficiency of the fluid is guaranteed; and the impurities are concentrated in the impurity collecting pipe and can be regularly removed without disassembly, so that the device is convenient to use.

Description

Technical Field

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

[0002] The brazed plate heat exchanger is a high-efficiency heat exchanger made by stacking metal sheets that are stamped into a certain corrugated shape by brazing. Heat is exchanged through the stacked plates. It has a compact structure and a large heat transfer area per unit volume.

[0003] Among them, the publication number is CN206488671U, which is named as a high-efficiency brazed plate heat exchanger, including a heat exchanger body, which is provided with a liquid inlet, a liquid outlet, a refrigerant inlet, a refrigerant outlet and a plurality of heat exchange plates. The fluid to be exchanged and the refrigerant are respectively input from the liquid inlet and the refrigerant inlet to the heat exchange between the heat exchange plates for heat exchange, and then respectively output through the liquid outlet and the refrigerant outlet, wherein the liquid inlet and the refrigerant inlet are both provided with a distributor, and a plurality of guide holes are evenly provided on the distributor to disperse the fluid flowing through the distributor so that the fluid is evenly dispersed between the heat exchange plates. The utility model has a unique structural distributor design, a higher fluid dispersion speed, and greatly improves the heat exchange efficiency of the evaporator.

[0004] In the above-mentioned prior art, the fluid enters from the liquid inlet for heat exchange, but the fluid used sometimes contains impurities, such as hot water fluid in HVAC. The impurities enter the plates of the heat exchanger with the flow of the fluid. The impurities accumulate on the plates, which will reduce the heat exchange efficiency. The long-term accumulation of impurities will affect the overall service life of the heat exchanger. Therefore, we propose a brazed plate heat exchanger to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a brazed plate heat exchanger to solve the problem raised in the above background technology that the fluid currently used in the market sometimes contains impurities, and the impurities enter the plates of the heat exchanger with the flow of the fluid. The impurities accumulate on the plates, which will reduce the heat exchange efficiency, and the long-term accumulation of impurities will affect the overall service life of the heat exchanger.

[0006] To achieve the above object, the utility model provides the following technical solution: a brazed plate heat exchanger, comprising a brazed plate heat exchanger body, the side of the brazed plate heat exchanger body is connected with a liquid inlet and a liquid outlet, and an inner flange of the liquid inlet is fixed with an inner processing tube;

[0007] One end of the inner processing tube extending into the liquid inlet is connected to a filter cover, the outer side of the end of the inner processing tube extending into the liquid inlet is bonded to a sealing gasket b, and the inner side of the liquid inlet is bonded to a sealing gasket a;

[0008] The inner processing tube is provided with a cleaning component for scraping and preventing the filter cover from being blocked, the lower end of the inner processing tube is connected with a debris collecting tube, and the lower end of the debris collecting tube is threadedly connected with a sealing cap;

[0009] A through groove is provided at the lower end of the liquid inlet pipe opening.

[0010] Preferably, the cleaning assembly includes a rotating rod rotatably connected to the filter cover, the end of the rotating rod is connected to a guide cover, the outer side of the right end of the guide cover is connected to a fan blade, the outer side of the right end of the guide cover is connected to a water spray pipe, and a cleaning scraper is installed at the end of the rotating rod away from the guide cover.

[0011] Preferably, the sealing gasket a and the sealing gasket b are both annular structures, and the sealing gasket a and the sealing gasket b fit tightly to each other.

[0012] Preferably, the filter cover is a truncated cone structure, and the outer diameter of the filter cover gradually decreases from left to right.

[0013] Preferably, the fan blades are of an arc-shaped structure, and the positions of the fan blades and the positions of the water spray pipes are arranged in a one-to-one correspondence.

[0014] Preferably, the debris collecting pipe can slide in the through groove, and the inner side surface of the debris collecting pipe is distributed in an inclined shape.

[0015] Preferably, the water spray pipe is an inverted "L"-shaped structure, with one end of the water spray pipe facing the fan blades.

[0016] Preferably, the cleaning scraper adapts to the inner wall shape of the filter cover and fits the filter cover, and the cleaning scraper is coaxially connected to the guide cover.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The brazed plate heat exchanger is provided with a detachable inner processing tube, and a filter cover connected to the end of the inner processing tube is used to intercept fluid impurities to prevent fluid impurities from entering the brazed plate heat exchanger. The disassembly of the inner processing tube facilitates maintenance of the structure and facilitates long-term use.

[0019] (2) The brazed plate heat exchanger uses a guide cover to guide and transport the fluid, so that the fluid is ejected from the water spray pipe. The jet force pushes the fan blades, so that the fan blades drive the guide cover to rotate, thereby driving the cleaning scraper to rotate, and continuously scraping and cleaning the filter cover to avoid clogging, thereby ensuring the efficiency of fluid flow. Impurities are concentrated in the collecting pipe, and the impurities can be regularly removed without disassembly, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the internal processing tube of the utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the internal processing tube of the utility model;

[0023] Figure 4 For this utility model Figure 3 A is an enlarged structural diagram;

[0024] Figure 5 This is a schematic diagram of the structure of the liquid inlet pipe port of the utility model when viewed from above;

[0025] Figure 6 It is a schematic diagram of the cross-sectional structure of the guide cover of the utility model.

[0026] In the figure: 1. brazed plate heat exchanger body; 2. liquid inlet pipe; 3. liquid outlet pipe; 4. sealing gasket a; 5. internal treatment pipe; 6. filter cover; 7. rotating rod; 8. guide cover; 9. fan blade; 10. collecting pipe; 11. sealing cover; 12. through groove; 13. water spray pipe; 14. sealing gasket b; 15. cleaning scraper. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 6 The utility model provides the following technical solutions: a brazed plate heat exchanger, comprising a brazed plate heat exchanger body 1, a liquid inlet pipe 2 and a liquid outlet pipe 3 are connected to the side of the brazed plate heat exchanger body 1, an inner flange of the liquid inlet pipe 2 is fixed with an inner processing pipe 5; one end of the inner processing pipe 5 extending into the liquid inlet pipe 2 is connected with a filter cover 6, the outer side of one end of the inner processing pipe 5 extending into the liquid inlet pipe 2 is bonded with a sealing gasket b14, and the inner side of the liquid inlet pipe 2 is bonded with a sealing gasket a4; a through groove 12 is provided at the lower end of the liquid inlet pipe 2;

[0029] Furthermore, the sealing gasket a4 and the sealing gasket b14 are both annular structures, and the sealing gasket a4 and the sealing gasket b14 are closely fitted to each other, and the sealing gasket a4 and the sealing gasket b14 are used to increase the sealing between the liquid inlet pipe port 2 and the inner processing pipe 5 to prevent fluid backflow and leakage; the filter cover 6 is a truncated cone structure, and the outer diameter of the filter cover 6 gradually decreases from left to right, which can guide the fluid so that the fluid is concentrated at the filter cover 6 for filtering and flowing;

[0030] The inner processing tube 5 is inserted into the liquid inlet pipe port 2. At this time, the collecting tube 10 slides in the through groove 12. The sealing gasket a4 and the sealing gasket b14 fit tightly, increasing the sealing performance between the inner processing tube 5 and the liquid inlet pipe port 2, and are fixed by the flange. The fluid enters from the inner processing tube 5, firstly passes through the guide cover 8 for guided transportation, and then is diverted to the water spray pipe 13 connected to the guide cover 8, and is sprayed out from the water spray pipe 13. The fluid continues to flow, and the impurities in the fluid are intercepted and filtered by the filter cover 6. The filtered fluid can enter the brazed plate heat exchanger body 1 along the liquid inlet pipe port 2 for heat exchange, and the inner processing tube 5 can be disassembled for cleaning;

[0031] Furthermore, a cleaning assembly for scraping and preventing the filter cover 6 from being blocked is provided in the inner processing tube 5, the lower end of the inner processing tube 5 is connected with a collection pipe 10, and the lower end of the collection pipe 10 is threadedly connected with a sealing cover 11; the cleaning assembly includes a rotating rod 7 rotatably connected in the filter cover 6, the end of the rotating rod 7 is connected with a guide cover 8, the outer side of the right end of the guide cover 8 is connected with a fan blade 9, the outer side of the right end of the guide cover 8 is connected with a water spray pipe 13, and a cleaning scraper 15 is installed at one end of the rotating rod 7 away from the guide cover 8;

[0032] Specifically, the fan blades 9 are of an arc-shaped structure, and the positions of the fan blades 9 and the positions of the water spray pipes 13 are arranged in a one-to-one correspondence, so that the water flow sprayed by the water spray pipes 13 can push the corresponding fan blades 9, so that the fan blades 9 control the rotation of the guide cover 8; the collecting pipe 10 can slide in the through groove 12, and the inner side surface of the collecting pipe 10 is inclined to avoid the mutual obstruction between the collecting pipe 10 and the liquid inlet pipe 2 and affecting the assembly of the internal processing pipe 5; the water spray pipe 13 is an inverted "L"-shaped structure, and one end of the water spray pipe 13 faces the fan blades 9, so that the water spray pipe 13 can smoothly spray the fluid to the fan blades 9; the cleaning scraper 15 adapts to the inner wall shape of the filter cover 6 and fits the filter cover 6, and the cleaning scraper 15 is coaxially connected with the guide cover 8, and the rotation of the guide cover 8 is used to control the rotation of the cleaning scraper 15 to scrape and clean the filter cover 6;

[0033] When the water pipe 13 sprays the fluid, the fluid pushes the fan blades 9, and the fan blades 9 apply force to the guide cover 8, so that the guide cover 8 rotates through the rotating rod 7, and the rotating rod 7 simultaneously drives the cleaning scraper 15 installed on the outside to rotate, and the cleaning scraper 15 is used to scrape and clean the filter cover 6 to prevent impurities from adhering to the filter cover 6 and causing blockage of the filter cover 6. The cleaned impurities can be concentrated and fall into the collecting pipe 10 by their own gravity. At a later stage, the sealing cover 11 threadedly connected to the lower end of the collecting pipe 10 can be removed to remove the impurities. The contents not described in detail in this manual belong to the existing technology known to professional and technical personnel in this field.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A brazed plate heat exchanger, comprising a brazed plate heat exchanger body (1), characterized in that: The side of the brazed plate heat exchanger body (1) is connected with a liquid inlet pipe opening (2) and a liquid outlet pipe opening (3), and an inner processing pipe (5) is fixed to the inner flange of the liquid inlet pipe opening (2); One end of the inner processing tube (5) extending into the liquid inlet pipe opening (2) is connected to a filter cover (6), the outer side of the end of the inner processing tube (5) extending into the liquid inlet pipe opening (2) is bonded to a sealing gasket b (14), and the inner side of the liquid inlet pipe opening (2) is bonded to a sealing gasket a (4); The inner processing tube (5) is provided with a cleaning component for scraping and preventing the filter cover (6) from being blocked; the lower end of the inner processing tube (5) is connected to a debris collecting tube (10); the lower end of the debris collecting tube (10) is threadedly connected to a sealing cover (11); A through groove (12) is provided at the lower end of the liquid inlet pipe opening (2).

2. The brazed plate heat exchanger according to claim 1, characterized in that: The cleaning assembly comprises a rotating rod (7) rotatably connected in the filter cover (6), the end of the rotating rod (7) is connected to a guide cover (8), the outer side of the right end of the guide cover (8) is connected to a fan blade (9), the outer side of the right end of the guide cover (8) is connected to a water spray pipe (13), and a cleaning scraper (15) is installed at one end of the rotating rod (7) away from the guide cover (8).

3. The brazed plate heat exchanger according to claim 1, characterized in that: The sealing gasket a (4) and the sealing gasket b (14) are both annular structures, and the sealing gasket a (4) and the sealing gasket b (14) fit tightly to each other.

4. The brazed plate heat exchanger according to claim 1, characterized in that: The filter cover (6) is a truncated cone-shaped structure, and the outer diameter of the filter cover (6) gradually decreases from left to right.

5. The brazed plate heat exchanger according to claim 2, characterized in that: The fan blade (9) is an arc-shaped structure, and the position of the fan blade (9) and the position of the water spray pipe (13) are arranged in a one-to-one correspondence.

6. The brazed plate heat exchanger according to claim 1, characterized in that: The collecting pipe (10) can slide in the through groove (12), and the inner side surface of the collecting pipe (10) is distributed in an inclined shape.

7. The brazed plate heat exchanger according to claim 2, characterized in that: The water spray pipe (13) is an inverted "L"-shaped structure, and one end of the water spray pipe (13) faces the fan blade (9).

8. The brazed plate heat exchanger according to claim 2, characterized in that: The cleaning scraper (15) adapts to the inner wall shape of the filter cover (6) and fits the filter cover (6), and the cleaning scraper (15) and the guide cover (8) are coaxially connected.

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