Plate heat exchanger

Abstract

The utility model discloses a plate heat exchanger, which relates to the technical field of plate heat exchangers, and comprises a front end plate, one side of the front end plate is provided with a hot water inlet and a cold water inlet, both the hot water inlet and the cold water inlet are provided with filtering pieces, one side, far away from the filtering pieces, of the front end plate is provided with a rear end plate, and a heat exchange plate is arranged between the front end plate and the rear end plate; the first disc is rotated anticlockwise, due to blocking of the pawl, the rotating column can be driven to rotate, the two filter screens are made to rotate, and therefore the two filter screens can be replaced easily; when the first disc rotates clockwise, the pawl and the spring are fixedly connected, and the contact surface of the pawl and the spring is an inclined surface, so that the pawl and the spring slide continuously, the pawl does not stop the ratchet wheel, the rotating column does not rotate, and the filter screen fixedly connected with the first disc rotates; and therefore, the filter screen far away from the front end plate can be replaced, and the replacement efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of plate heat exchanger technology, specifically to a plate heat exchanger. Background Technology

[0002] Plate heat exchangers are made of multiple stamped corrugated thin plates spaced at certain intervals, sealed on all four sides by gaskets, and overlapped and pressed together by a frame and a clamping screw. The four corner holes of the plates and gaskets form the distribution pipes and collection pipes of the fluid, while also reasonably separating the hot and cold fluids, allowing them to flow in the flow channels on both sides of each plate and exchange heat through the plates.

[0003] Plate heat exchangers are widely used in petroleum, chemical, light industry, pharmaceutical, metallurgy, power, papermaking, textile energy, and daily life. They are often used to heat low-temperature fluids or cool high-temperature fluids, converting liquids into steam or condensing steam into liquids. The heat exchanger is a heat conversion device formed by the extrusion of corrugated metal sheets between two plates. It can convert liquids and gases. Due to its high conversion efficiency, low heat loss, and compact structure, it is widely used to improve the efficiency of enterprises in production. Some households that require high quality can also install plate heat exchangers at home. Plate heat exchangers are easy to disassemble and maintain and occupy little space. Due to the maturity of the technology, they are often one of the first choices.

[0004] However, in actual use, the water entering the heat exchanger may carry impurities. As the heat exchanger is used for a longer period of time, the impurities in the water entering the heat exchanger may accumulate, thereby clogging the flow channels between the heat exchange plates and causing the heat exchanger to malfunction.

[0005] In summary, this invention proposes a plate heat exchanger. Utility Model Content

[0006] The purpose of this invention is to provide a plate heat exchanger to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a plate heat exchanger, including a front end plate, a hot water inlet and a cold water inlet on one side of the front end plate, both the hot water inlet and the cold water inlet being provided with filter elements, a rear end plate being provided on the side of the front end plate away from the filter elements, and a heat exchange plate being provided between the front end plate and the rear end plate.

[0008] The filter element includes a sleeve and two filter elements. The side wall of the sleeve is fixedly connected to one side of the front end plate. One of the filter elements is located between one end of the sleeve and the front end plate, and the other filter element is connected to the end of the sleeve away from the front end plate. A filter tube is provided inside the sleeve.

[0009] Preferably, the filter element includes two rings, one of which is rotatably connected to the end of the sleeve, and a filter screen is detachably connected between the two rings. Each of the two rings has a circular hole, and a bolt is installed in the circular hole.

[0010] Preferably, a fixing block is fixedly connected to the side wall of the sleeve, and a rotating column is rotatably connected to one side of the fixing block. A disc is provided at both ends of the rotating column. A ratchet is fixedly connected to the inner wall of one of the discs, and a spring is fixedly connected to the side wall of the rotating column near the ratchet end. A pawl is fixedly connected to one end of the spring.

[0011] Preferably, a limiting block is fixedly connected to one side of the disk, and the limiting block is slidably connected to the opposite sides of the pawl on both sides.

[0012] Preferably, the rotating column is rotatably connected to two discs on opposite sides. The discs have two holes and two bolts are installed in the holes. The discs are detachably connected to the front end plate via the bolts.

[0013] Preferably, an L-shaped frame is fixedly connected to the side wall of the sleeve. A circular hole is provided on one side of the L-shaped frame, and a bolt is provided in the circular hole. Each bolt passes through the L-shaped frame and is fixedly connected to the front end plate.

[0014] Preferably, the sleeve includes two half sleeves, and four circular holes are opened on the two sleeves, and four bolts are provided on the four circular holes.

[0015] Preferably, both the front end plate and the rear end plate are provided with a circular hole five, and a bolt five is provided in the circular hole five. Each bolt five passes through the front end plate and connects to the rear end plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model describes a plate heat exchanger:

[0018] 1. This utility model utilizes the counterclockwise rotation of disc one. Due to the obstruction of the pawl, the rotating column rotates, causing both filter screens to rotate, thus facilitating the replacement of the two filter screens. When disc one rotates clockwise, because the pawl is fixedly connected to the spring and their contact surface is inclined, it slides continuously. This prevents the pawl from obstructing the ratchet, thus preventing the rotating column from rotating. Consequently, the filter screen fixedly connected to disc one rotates, facilitating the replacement of the filter screen far from the front end plate, further improving replacement efficiency.

[0019] 2. This utility model allows for the detachable connection of two half-sleeves via bolts, making the filter tube and the front end plate detachable. This allows for the replacement of filter tubes with different filtration effects, improving the applicability of the heat exchanger. Furthermore, each filter tube has multiple filter holes, enabling it to filter water as well, thereby accelerating the water filtration speed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the filter element of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the filter element of this utility model;

[0023] Figure 4 This is a schematic diagram of the filter element structure of this utility model;

[0024] Figure 5 for Figure 4 A magnified view of A in the middle.

[0025] In the diagram: 1. Front end plate; 10. Hole 5; 11. Bolt 5; 2. Hot water inlet; 3. Cold water inlet; 4. Filter element; 40. Sleeve; 400. Half sleeve; 401. Hole 4; 402. Bolt 4; 41. Filter element; 410. Ring; 411. Filter screen; 412. Hole 1; 413. Bolt 1; 42. Filter tube; 43. Fixing block; 44. Rotating column; 440. Disc 2; 441. Hole 2; 442. Bolt 2; 45. Disc 1; 46. Ratchet; 47. Spring; 48. Pawl; 49. Limiting block; 5. Rear end plate; 6. Heat exchange plate; 7. L-shaped frame; 70. Hole 3; 71. Bolt 3. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 A plate heat exchanger includes a front plate 1, a hot water inlet 2 and a cold water inlet 3 on one side of the front plate 1, a filter element 4 on both the hot water inlet 2 and the cold water inlet 3, a rear plate 5 on the side of the front plate 1 away from the filter element 4, and a heat exchange plate 6 between the front plate 1 and the rear plate 5.

[0028] The filter element 4 includes a sleeve 40 and two filter elements 41. The side wall of the sleeve 40 is fixedly connected to one side of the front end plate 1. One filter element 41 is located between one end of the sleeve 40 and the front end plate 1, and the other filter element 41 is connected to the end of the sleeve 40 away from the front end plate 1. A filter tube 42 is provided inside the sleeve 40.

[0029] Example 1

[0030] Please see Figure 1-5 This embodiment provides a plate heat exchanger. First, the filter tube 42 is placed into two half-tubes 400, and then the two half-tubes 400 are detachably connected by bolts 402, so that the filter tube 42 is detachably connected to the front end plate 1. This allows for the replacement of filter tubes 42 with different filtration effects, improving the applicability of the heat exchanger. Each filter tube 42 has multiple filter holes, so that the filter tube 42 can also filter water, thereby accelerating the filtration speed. Then, two filter screens 411 are placed into two rings 410 located at both ends of the filter tube 42, and then the filter screens 411 and rings 410 are detachably connected by bolts 413.

[0031] It should be noted that the mesh diameters of the filter screens 411 located at both ends of the filter tube 42 can be different, so as to remove impurities more effectively. If the mesh diameters of the two filter screens 411 are different, the mesh diameter closer to the front plate 1 is smaller than that farther from the front plate 1, which can more effectively prevent smaller impurities from entering the heat exchange plate 6 and causing damage to the plate heat exchanger.

[0032] After the filter element 4 is assembled, it is fixedly connected to the front end plate 1 by bolts 442 and 71. Then, both hot and cold water can enter the heat exchange plate 6 through the filter element 4 to achieve the effect of heat exchange.

[0033] However, in actual use, the water entering the heat exchanger may carry impurities. As the heat exchanger is used for a longer period of time, the impurities in the water may accumulate and block the flow channels between the heat exchange plates, making the heat exchanger unable to work properly. The impurities are filtered by the filter screen 411. However, as time goes on, the mesh of the filter screen 411 will also become clogged. Therefore, the filter screen 411 needs to be replaced frequently or removed for washing.

[0034] To make the filter screen 411 easier to remove, and since the disc 45 is fixedly connected to the ratchet 46, rotating the disc 45 counterclockwise will cause the rotating column 44 to rotate due to the obstruction of the pawl 48, thus causing both filter screens 411 to rotate, which facilitates the replacement of both filter screens 411. When the disc 45 rotates clockwise, since the pawl 48 is fixedly connected to the spring 47 and their contact surface is inclined, they will slide continuously. In this way, the pawl 48 will not obstruct the ratchet 46, preventing the rotating column 44 from rotating, thus causing the filter screen 411 fixedly connected to the disc 45 to rotate. This facilitates the replacement of the filter screen 411 away from the front end plate 1, further improving the replacement efficiency.

[0035] It should be noted that the disc 45 closer to the front end plate 1 is fixedly connected to the rotating column 44, while the disc 45 further away from the front end plate 1 is rotatably connected to the rotating column 44.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plate heat exchanger, comprising a front end plate (1), characterized in that: A hot water inlet (2) and a cold water inlet (3) are provided on one side of the front end plate (1). A filter element (4) is provided on both the hot water inlet (2) and the cold water inlet (3). A rear end plate (5) is provided on the side of the front end plate (1) away from the filter element (4). A heat exchange plate (6) is provided between the front end plate (1) and the rear end plate (5). The filter element (4) includes a sleeve (40) and two filter elements (41). The side wall of the sleeve (40) is fixedly connected to one side of the front end plate (1). One of the filter elements (41) is located between one end of the sleeve (40) and the front end plate (1), and the other filter element (41) is connected to the end of the sleeve (40) away from the front end plate (1). A filter tube (42) is provided inside the sleeve (40).

2. A plate heat exchanger according to claim 1, characterized in that: The filter element (41) includes two rings (410), one of which is rotatably connected to the end of the sleeve (40) on one side, and a filter screen (411) is detachably connected between the two rings (410). A circular hole (412) is provided on each of the two rings (410), and a bolt (413) is provided in the circular hole (412).

3. A plate heat exchanger according to claim 1, characterized in that: A fixing block (43) is fixedly connected to the side wall of the sleeve (40). A rotating column (44) is rotatably connected to one side of the fixing block (43). A disc (45) is provided at both ends of the rotating column (44). A ratchet (46) is fixedly connected to the inner wall of one of the discs (45). A spring (47) is fixedly connected to the side wall of the rotating column (44) near the ratchet (46). A pawl (48) is fixedly connected to one end of the spring (47).

4. A plate heat exchanger according to claim 1, characterized in that: One side of the disk (45) is fixedly connected to a limiting block (49), and the limiting block (49) is slidably connected to the opposite sides of the pawl (48) on both sides.

5. A plate heat exchanger according to claim 1, characterized in that: The rotating column (44) is rotatably connected to the two sides of the disc (440). The disc (440) has a hole (441) and a bolt (442) is installed in the hole (441). The disc (440) is detachably connected to the front end plate (1) by the bolt (442).

6. A plate heat exchanger according to claim 1, characterized in that: The sleeve (40) is fixedly connected to an L-shaped frame (7) on its side wall. A three-round hole (70) is provided on one side of the L-shaped frame (7). A three-bolt (71) is provided in the three-round hole (70). Each three-bolt (71) passes through the L-shaped frame (7) and is fixedly connected to the front end plate (1).

7. A plate heat exchanger according to claim 1, characterized in that: The sleeve (40) includes two half sleeves (400), and the two half sleeves (400) are provided with four round holes (401), and four bolts (402) are provided on the four round holes (401).

8. A plate heat exchanger according to claim 1, characterized in that: Both the front end plate (1) and the rear end plate (5) are provided with circular holes five (10), and bolts five (11) are provided in the circular holes five (10). Each bolt five (11) passes through the front end plate (1) and is connected to the rear end plate (5).

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