A fast-cleaning narrow-diameter fin-tube heat exchanger

Abstract

The present invention relates to the technical field of heat exchangers, and specifically discloses a finned tube heat exchanger with a small tube diameter that can be quickly cleaned, including an outer frame. A first fin group and a second fin group are arranged in the outer frame. A first heat exchange tube and a second heat exchange tube are respectively arranged on the first fin group and the second fin group. The first heat exchange tube and the second heat exchange tube are connected by a telescopic pipe fitting. A driving and guiding assembly is arranged in the outer frame. Both the first fin group and the second fin group include side plates. A plurality of fins are arranged at equal intervals on one side surface of the side plates. Scrapers are connected to the ends of the fins far away from the side plates. The finned tube heat exchanger with a small tube diameter disclosed by the present invention realizes the quick cleaning of dust inside the fin heat exchanger, without the need to blow with external high-pressure gas. The whole heat exchanger has a simple structure and excellent effect of quickly cleaning impurities. At the same time, the refrigerant transportation between the first and second heat exchange tubes has good sealing performance, preventing leakage and having high safety.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular discloses a fast-cleaning thin-diameter fin-tube heat exchanger. Background Art

[0002] The narrow-diameter fin-tube heat exchanger is a fin-tube heat exchanger with a heat exchange tube diameter less than 7mm. It has been widely used in refrigeration equipment such as refrigerators, freezers and air conditioners.

[0003] During the operation of the fin heat exchanger, the fan sends external air into the heat exchanger. The air sent in often contains dust. When the dust enters the heat exchanger, it will be attached to the fins due to the liquefaction phenomenon. After a period of time, the dust will accumulate more and more, affecting the use of the heat exchanger. Especially for the thin-diameter fin-tube heat exchanger, due to its small size and short fin spacing, once a certain amount of dust adheres to the fins, it needs to be cleaned immediately. However, due to the structural limitations of the existing fin-tube heat exchanger, it is necessary to remove the fin assembly from the inside of the heat exchanger and then use special tools to clean it. The cleaning of the entire fin heat exchanger is time-consuming and laborious.

[0004] The utility model patent with application number 2018215400439 discloses a dustproof air-cooled heat exchanger, including a heat exchanger body, a dustproof box and a dust removal component. The heat exchanger body is arranged inside the dustproof box, the dust removal component is arranged at the rear end of the heat exchanger body, and the upper and lower ends of the heat exchanger body are provided with heat dissipation fins. The dust removal component includes a cleaning component arranged on the top of the dustproof box and a dust removal component arranged on the side wall of the dustproof box. The cleaning component includes a dust cover arranged horizontally on the top of the dustproof box and a driving member for driving the dust cover to move horizontally. The dust cover and the dustproof box are slidably matched, the driving member is arranged at the left end of the dustproof box, and the right end of the dust cover is provided with a cleaning member. Although the heat exchanger disclosed in the patent has the functions of dustproof and dust removal, the dust cover cannot filter the air during the use of the heat exchanger, and the dust removal component needs to be connected to an external compressed air source when cleaning the dust attached to the fins, resulting in a complex structure of the entire heat exchanger, which is not suitable for refrigeration equipment such as refrigerators and freezers. Therefore, in view of the above-mentioned deficiencies of the existing dust-proof air-cooled heat exchangers, the present application proposes a thin-diameter fin-tube heat exchanger that can be quickly cleaned. Summary of the invention

[0005] The present invention aims to provide a thin-diameter fin-tube heat exchanger that can be quickly cleaned, so as to solve the shortcomings of the existing heat exchanger that dust cannot be filtered during operation and an external compressed air source is required for dust cleaning.

[0006] The present invention is achieved through the following technical solutions:

[0007] A fast-cleaning thin-diameter fin-tube heat exchanger comprises an outer frame, wherein a first fin group and a second fin group are arranged in front and back of the outer frame, a first heat exchange tube and a second heat exchange tube are arranged on the first fin group and the second fin group respectively, the first heat exchange tube and the second heat exchange tube are connected by a telescopic pipe fitting, and a driving guide assembly for realizing the first fin group and the second fin group to move closer to or farther from each other is arranged in the outer frame;

[0008] The first fin group and the second fin group both include side plates, a side surface of the side plates is provided with a plurality of fins at equal intervals, an end of each fin away from the side plates is connected to a scraper, the fins on the first fin group and the second fin group are arranged alternately, two ends of the scraper in the first fin group are in contact with two adjacent fins on the second fin group, and two ends of the scraper in the second fin group are in contact with two adjacent fins on the first fin group.

[0009] After the thin-diameter fin-tube heat exchanger disclosed in the present invention has been running for a period of time, a large amount of dust will adhere to its fins, which will affect its heat exchange and cooling effect and ventilation effect. At this time, a driving guide component is used to realize the first fin group and the second fin group in the outer frame to move away from each other. Since the two ends of the scraper in the first fin group are in contact with the two adjacent fins on the second fin group, and the two ends of the scraper in the second fin group are in contact with the two adjacent fins on the first fin group, during the process of the first fin group and the second fin group moving away from each other, the scraper on the first fin group can scrape off the dust attached to the fins in the second fin group, and the scraper on the second fin group can scrape off the dust attached to the fins in the first fin group, thereby realizing the rapid cleaning of dust on all fins in the heat exchanger. After the cleaning is completed, the first fin group and the second fin group can be reset close to each other under the reverse action of the driving guide component, and can be put into normal use immediately after the reset.

[0010] As a further configuration of the above scheme, the driving guide assembly includes a bidirectional screw and a sliding rod parallel to each other, and nut blocks and sliding hole blocks are respectively provided at both ends of the side plates of the first fin group and the second fin group. The nut blocks on the first fin group and the second fin group respectively match the external threads at both ends of the bidirectional screw, and the two ends of the sliding rod match the sliding hole blocks.

[0011] As a further configuration of the above solution, a twisting block is provided at the end of one end of the bidirectional screw extending out of the outer frame, and a hexagonal groove is also provided at the outer end of the twisting block.

[0012] As a further configuration of the above solution, one end of the bidirectional screw extending out of the outer frame is connected to a cleaning motor.

[0013] As a further configuration of the above scheme, the telescopic pipe includes a sleeve connected to the first heat exchange tube and an insert connected to the second heat exchange tube, the insert is inserted into the sleeve, and a sealing block is provided at the end of the insert.

[0014] As a further configuration of the above solution, the telescopic pipe fitting is a telescopic tube, and both ends of the telescopic tube are directly connected to the first heat exchange tube and the second heat exchange tube.

[0015] As a further configuration of the above solution, a dust filter is detachably connected to the upper end of the outer frame.

[0016] As a further configuration of the above solution, a cold air exhaust hood is provided at the lower end of the outer frame, and the lower end of the cold air exhaust hood is gathered toward the middle.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The thin-diameter fin-tube heat exchanger disclosed in the present invention, on the one hand, through the special design of the first fin group and the second fin group, enables the first fin group and the second fin group to produce relative movement under the action of the driving guide component, and in the process of relative movement, the scrapers at the ends of the fins are used to quickly scrape off complex dust, thereby realizing rapid cleaning of dust inside the fin heat exchanger without the need for external high-pressure gas purging. The entire heat exchanger has a simple structure and has an excellent effect of quickly cleaning impurities.

[0019] The present invention further provides a detachable dust filter at the upper end of the outer frame, and uses the dust filter to filter the incoming air, thereby reducing the speed of dust adhering to the surface of the fins in the outer frame, thereby reducing the frequency of cleaning the heat exchanger; in addition, the two designs of the telescopic pipe fittings not only realize the relative movement of the first fin group and the second fin group, but also ensure the sealing of the refrigerant between the first heat exchange tube and the second heat exchange tube during transportation, preventing leakage, and having higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure from a first angle of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure from a second angle of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the first fin group, the second fin group, etc. in Example 1 of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the second fin group, the second heat exchange tube, etc. in Example 2 of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of Example 2 of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the first fin group, the second fin group, etc. in Example 2 of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 6 , and describes the application in detail with reference to embodiments. Example 1

[0029] Example 1 discloses a fast-cleaning thin-diameter fin-tube heat exchanger, see the attached Figure 1 and attached Figure 2 The main body of the heat exchanger includes an outer frame 1, a first fin group 2, and a second fin group 3. The first fin group 2 and the second fin group 3 are respectively arranged at the front and rear ends of the outer frame 1. A dust filter 4 is detachably connected to the upper opening of the outer frame 1 through screws and other connectors, and a cold air exhaust cover 5 is arranged at the lower opening of the outer frame 1, and the lower end of the cold air exhaust cover 5 is gathered toward the middle, so that the cold air generated by heat exchange can be concentrated and directed to be discharged from the inside of the heat exchanger.

[0030] Reference Figure 3 and attached Figure 4The first fin group 2 and the second fin group 3 both include a side plate 201, and a plurality of fins 202 are arranged at equal intervals on one side of the side plate 201, and a scraper 203 perpendicular to the fin 202 is connected to one end of each fin 202 away from the corresponding side plate 201, so that a T-shaped structure is formed between the fin 202 and the scraper 203, and a gap slightly larger than the thickness of the fin 202 is left between two adjacent scrapers 203. The above-mentioned reserved gap allows the fins 202 on the first fin group 2 and the second fin group 3 to be arranged in a staggered manner, and the two ends of the scraper 203 on the first fin group 2 are respectively in contact with the two adjacent fins 202 on the second fin group 3, and the two ends of the scraper 203 on the second fin group 3 are respectively in contact with the two adjacent fins 202 on the first fin group 2.

[0031] The first fin group 2 and the second fin group 3 are respectively provided with an S-shaped first heat exchange tube 6 and a second heat exchange tube 7, and the first heat exchange tube 6 and the second heat exchange tube 7 are circuitously arranged on a plurality of fins 202 near one end of the corresponding side plate 201, and the first heat exchange tube 6 is expanded and fixedly connected with the fins 202 in the first fin group 2 by using a tube expansion process. The second heat exchange tube 7 is expanded and fixedly connected with the fins 202 in the second fin group 3. A refrigerant inlet 601 is provided at the lower end of the first heat exchange tube 6, and then a sleeve 602 is connected to the upper end of the first heat exchange tube 6. A refrigerant outlet 701 is connected to the lower end of the second heat exchange tube 7, and a plug 702 extending into the sleeve 602 is connected to the upper end of the second heat exchange tube 7, and a sealing block 703 is provided at the end of the plug 702, which is sealingly and slidably connected to the inner wall of the sleeve 602, so that the plug 702 can effectively ensure the sealing between the two during the axial movement of the sleeve 602 to prevent the refrigerant from leaking.

[0032] Nut blocks 8 and sliding holes 9 are respectively provided at both ends of the side plates 201 of the first fin group 2 and the second fin group 3, and a bidirectional screw 10 is threadedly connected between the nut blocks 8 between the first fin group 2 and the second fin group 3, and the external threads at both ends of the bidirectional screw 10 are arranged in opposite directions and match the corresponding nut blocks 8, and then one end of the bidirectional screw 10 is extended out of the outer frame 1, and a twisting block 11 is connected to the end of the bidirectional screw 10 extending out of the outer frame 1, and the outer end of the twisting block 11 is also provided with a hexagonal groove, which is convenient for twisting it with a hexagonal wrench. Finally, a slide bar 12 is also provided between the sliding holes 9 between the first fin group 2 and the second fin group 3, and both ends of the slide bar 12 are fixedly connected to the front and rear ends of the inner wall of the outer frame 1.

[0033] During operation of the narrow-diameter fin-tube heat exchanger disclosed in the first embodiment, air is supplied through the upper opening of the outer frame 1 , and is discharged from the cold air exhaust hood 5 after heat exchange and temperature reduction by the first fin group 2 and the second fin group 3 inside.

[0034] When external air enters the outer frame 1, it first passes through the dust filter 4 to filter out most of the dust in the air, and then enters the outer frame 1 to perform heat exchange through the air flow gap between the first fin group 2 and the second fin group 3. The small amount of dust remaining in the air will still adhere to the surface of the fin 202 due to liquefaction.

[0035] Whenever the heat exchange and cooling effect of the narrow-diameter fin-tube heat exchanger decreases after running for a period of time, the operator can rotate the screw block 11 by hand or with a hexagonal wrench to rotate the bidirectional screw 10, and then during the rotation of the bidirectional screw 10, the first fin group 2 and the second fin group 3 are moved away from each other through the action between the nut block 8 and the bidirectional screw 10, and in the process of the first fin group 2 and the second fin group 3 moving away from each other, the scrapers 203 at the ends of the fins 202 of both parties are used to scrape the surfaces of the fins 202, so as to quickly scrape off and clean the dust and debris originally attached to the surface of the fins 202. After the dust on the narrow-diameter fin-tube heat exchanger is cleaned, the bidirectional screw 10 is rotated in the opposite direction to reset the first fin group 2 and the second fin group 3 close to each other and put into use again. Example 2

[0036] Example 2 discloses a thin-diameter fin-tube heat exchanger optimized based on Example 1. The similarities between Example 2 and Example 1 are not described again. The differences between them are shown in the attached figure. Figure 5 and attached Figure 6 .

[0037] The present narrow-diameter fin-tube heat exchanger is provided with a cleaning motor 14 on the front side of the outer frame 1, and the motor shaft of the cleaning motor 14 is directly connected to one end of the bidirectional screw 10 through a coupling, thereby replacing the rotational driving function of the twisting block 11. When it is found that the heat exchange and cooling effect of the entire narrow-diameter fin-tube heat exchanger decreases, the cleaning motor 14 can be directly started to make the bidirectional screw 10 rotate forward a certain number of times first. During the rotation of the bidirectional screw 10, the first fin group 2 and the second fin group 3 are moved away from each other through the action between the nut block 8 and the bidirectional screw 10, and during the process of the first fin group 2 and the second fin group 3 moving away from each other, the scrapers 203 at the ends of the fins 202 of both parties are used to scrape the surfaces of the fins 202, thereby quickly scraping off and cleaning the dust and debris originally attached to the surface of the fins 202. After the dust on the small-diameter fin-tube heat exchanger is cleaned, the cleaning motor 14 is started in reverse to make the first fin group 2 and the second fin group 3 close to each other and reset, and the heat exchanger can be put into use again.

[0038] In addition, the present embodiment 2 also directly uses the telescopic tube 13 to connect the upper ends of the first heat exchange tube 6 and the second heat exchange tube 7, thereby replacing the telescopic sealing connecting tube structure composed of the sleeve 602, the insert tube 702 and the sealing block 703. While ensuring the telescopic adjustment, the sealing of the refrigerant during transportation between the first heat exchange tube 6 and the second heat exchange tube 7 is achieved to prevent leakage.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fast-cleaning narrow-diameter fin-tube heat exchanger, comprising an outer frame, It is characterized in that The outer frame is provided with a first fin group and a second fin group in front and back, the first fin group and the second fin group are provided with a first heat exchange tube and a second heat exchange tube respectively, the first heat exchange tube and the second heat exchange tube are connected by a telescopic pipe fitting, and the outer frame is provided with a driving guide assembly for realizing the first fin group and the second fin group to approach or move away from each other; The first fin group and the second fin group both include side plates, a side surface of the side plates is provided with a plurality of fins at equal intervals, an end of each fin away from the side plates is connected to a scraper, the fins on the first fin group and the second fin group are arranged alternately, two ends of the scraper in the first fin group are in contact with two adjacent fins on the second fin group, and two ends of the scraper in the second fin group are in contact with two adjacent fins on the first fin group.

2. A fast-cleaning narrow-diameter fin-tube heat exchanger according to claim 1, It is characterized in that The driving guide assembly includes a bidirectional screw and a sliding rod parallel to each other. Nut blocks and sliding hole blocks are respectively provided at both ends of the side plates of the first fin group and the second fin group. The nut blocks on the first fin group and the second fin group are respectively matched with the external threads at both ends of the bidirectional screw, and the two ends of the sliding rod are matched with the sliding hole blocks.

3. A fast-cleaning narrow-diameter fin-tube heat exchanger according to claim 2, It is characterized in that A twisting block is arranged at the end of one end of the bidirectional screw rod extending out of the outer frame, and a hexagonal groove is also arranged at the outer end of the twisting block.

4. A fast-cleaning narrow-diameter fin-tube heat exchanger according to claim 2, It is characterized in that One end of the bidirectional screw rod extends out of the outer frame and is connected with a cleaning motor.

5. A fast-cleaning narrow-diameter fin-tube heat exchanger according to claim 1, It is characterized in that The telescopic pipe comprises a sleeve connected to the first heat exchange tube and an insert connected to the second heat exchange tube. The insert is inserted into the sleeve and a sealing block is arranged at the end of the insert.

6. A fast-cleaning narrow-diameter fin-tube heat exchanger according to claim 1, It is characterized in that The telescopic pipe fitting is a telescopic pipe, and both ends of the telescopic pipe are directly connected to the first heat exchange pipe and the second heat exchange pipe.

7. A fast-cleaning narrow-diameter fin-tube heat exchanger according to any one of claims 1 to 6, It is characterized in that The upper end of the outer frame is detachably connected with a dust removal filter.

8. A fast-cleaning narrow-diameter fin-tube heat exchanger according to claim 7, It is characterized in that A cold air exhaust cover is arranged at the lower end of the outer frame, and the lower end of the cold air exhaust cover is gathered toward the middle.

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