Refrigeration device with anti-clogging function

Abstract

The application discloses a refrigeration equipment with anti-blocking function, and particularly relates to the field of refrigeration, which comprises a compressor, a condenser, a throttle valve and an evaporator which are sequentially communicated in sequence, and the condenser is communicated with the throttle valve through a drying filter; the drying filter comprises a shell, two front-end filter screens are fixedly installed in the interior of the shell, and a rear-end filter screen is arranged below the two front-end filter screens; a molecular sieve drying core is filled between the two front-end filter screens; the rear-end filter screen is provided with a plurality of filter holes on the surface thereof, and a gap is formed between the rear-end filter screen and the front-end filter screen below; a plurality of notches are formed in the circumferential direction of the rear-end filter screen, a containing hopper is arranged in the interior of the notch, and a dredging disc is arranged below the rear-end filter screen. The application can prevent the drying filter from being blocked by adopting the dredging mode, and is suitable for the structure of the shell which is integrally welded and cannot discharge impurities by adopting the mode of collecting impurities.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a refrigeration device with anti-clogging function. Background Technology

[0002] Refrigeration equipment is a core component in cold chain warehousing, food processing, and low-temperature preservation. It primarily achieves heat transfer through a vapor compression refrigeration cycle, relying on the coordinated operation of four core components: the compressor, condenser, expansion valve, and evaporator, to ensure continuous and stable cooling. During operation, the compressor compresses the low-temperature, low-pressure gaseous refrigerant, transforming it into a high-temperature, high-pressure gaseous refrigerant. This gaseous refrigerant then liquefies in the condenser, forming a high-pressure liquid refrigerant. The liquid refrigerant is then throttled and cooled by the expansion valve, forming a low-temperature, low-pressure gas-liquid mixture. Finally, it absorbs heat from the environment and vaporizes in the evaporator, continuously removing heat from the equipment and the surrounding environment to achieve continuous cooling and ensure stable operation in various low-temperature scenarios.

[0003] The dryer filter is an indispensable core protective component in the refrigeration system piping. The existing dryer filter mainly consists of a shell, a front-end filter screen, an internal molecular sieve drying core, and a rear-end filter screen. It is installed in series in the liquid pipeline between the condenser and the throttle valve, and mainly plays a dual role in filtering solid impurities and adsorbing moisture in the system.

[0004] The filter screen effectively intercepts solid debris such as welding slag, metal shavings, oxide scale, and sealing debris in the pipeline, preventing impurities from entering the expansion valve and causing blockage. The internal molecular sieve adsorbs free water mixed in the refrigerant and refrigeration oil, preventing water from condensing and freezing at the low-temperature throttling position and causing ice blockage. This ensures smooth refrigerant pipeline operation, stable operation of throttling components, and reduces the probability of refrigeration system blockage failure.

[0005] The front-end filter screen of the dryer is coarser, which can filter larger impurities such as welding slag from pipelines, while the rear-end filter screen is finer, which can filter finer impurities such as metal shavings. As the system operates, the amount of impurities in the system will increase. Before the molecular sieve reaches the end of its service life, the impurities will clog the rear-end filter screen prematurely. The current method is to replace the dryer filter, which makes the service life of the dryer filter generally short. Summary of the Invention

[0006] The present invention provides a refrigeration device with anti-clogging function, which aims to solve the problem that: in existing refrigeration devices, impurities clog the downstream filter screen before the molecular sieve reaches its service life, resulting in a reduction in the service life of the dryer filter.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a refrigeration device with anti-clogging function, comprising a compressor, a condenser, a throttling valve, and an evaporator connected in sequence, wherein the condenser and the throttling valve are connected by a dryer filter; the dryer filter includes a housing, inside which two front-end filter screens and a rear-end filter screen located below the two front-end filter screens are fixedly installed, a molecular sieve drying core is filled between the two front-end filter screens, the surface of the rear-end filter screen has several filter holes, and there is a gap between the rear-end filter screen and one of the front-end filter screens located below it; several slots are opened in the circumferential direction of the rear-end filter screen, and a receiving hopper is provided inside the slots; a draining disc is provided below the rear-end filter screen, the draining disc moves upward to push away impurities on the filter holes, and the receiving hopper is used to collect impurities.

[0008] Preferably, the drain tray includes a connector, and a plurality of drain plates are fixedly installed in the circumferential direction at the upper end of the connector. The plurality of drain plates are respectively located between adjacent receiving hoppers. Drain columns corresponding to the filter holes are fixedly installed on the surface of the drain plates. The drain columns are used to insert upward into the interior of the filter holes to push away impurities on the filter holes, and the drain columns are conical.

[0009] Preferably, the sidewall of the unblocking plate is fitted to the inner wall of the shell and the sidewall of the receiving hopper, and flow grooves are provided between the unblocking columns.

[0010] Preferably, the container has a receiving cavity inside, with a depth ranging from 20mm to 50mm and a width ranging from 2mm to 5mm.

[0011] Preferably, a support plate is provided below the drain pan and fixedly installed with the housing, and a fixing post is fixedly installed at the bottom of the connector. The fixing post is vertically movably inserted into the support plate, and a spring is sleeved on the outside of the fixing post. The spring is used to reset the fixing post downward.

[0012] Preferably, a top block is slidably mounted on the support plate, and a connecting frame is fixedly mounted on the top block. The bottom of the connecting piece is provided with an inclined surface. When the top block moves, the end of the top block pushes the inclined surface, thereby causing the drain plate to move upward.

[0013] Preferably, a drive assembly is installed on the housing. The drive assembly includes a flexible metal tube fixedly installed on the outer wall of the housing and communicating with the inner side of the bottom of the housing. The free end of the flexible metal tube is a closed structure. A steel wire rope is fixedly connected to the connecting frame. The end of the steel wire rope away from the connecting frame is fixedly connected to the free end of the flexible metal tube. The steel wire rope is attached to the inner wall of the flexible metal tube. When the flexible metal tube bends back and forth to both sides, the position of the flexible metal tube where the steel wire rope is located switches back and forth between the innermost and outermost sides.

[0014] Preferably, the drive assembly further includes a motor and a connecting arm. The motor is fixedly mounted to the housing, one end of the connecting arm is fixedly connected to the output end of the motor, and the other end of the connecting arm is hinged to one side of the free end of the metal hose.

[0015] Preferably, both sides of the metal hose are provided with arc-shaped guide plates that are fixedly connected to the shell, so that the metal hose can bend to both sides and fit into the two arc-shaped guide plates respectively.

[0016] Preferably, a baffle is fixedly connected to the side wall of each slot, and a baffle is provided directly above the receiving cavity, with the baffle fixedly connected to the inner wall of the receiving hopper.

[0017] The technical effects and advantages of this invention are as follows: This invention can prevent the dryer filter from becoming clogged by adopting a dredging method, and by adopting a method of collecting impurities, it is suitable for the structure of a shell that is integrally welded and cannot discharge impurities. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the installation of the drying filter of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the drying filter and drive assembly of the present invention.

[0021] Figure 4 For the present invention Figure 3 A sectional view of the structure.

[0022] Figure 5 For the present invention Figure 4 A partial structural diagram.

[0023] Figure 6 This is a schematic diagram of the internal structure of the drying filter of the present invention.

[0024] Figure 7 For the present invention Figure 6 Front view of the structure.

[0025] Figure 8 For the present invention Figure 6 Exploded view of the structure.

[0026] Figure 9 This is a schematic diagram of the structure of the unblocking plate and the receiving hopper of the present invention.

[0027] Figure 10This is a schematic diagram of the structure of the top block and driving component of the present invention.

[0028] The attached figures are labeled as follows: 1. Compressor; 2. Condenser; 3. Throttling valve; 4. Evaporator; 5. Dryer filter; 50. Molecular sieve drying core; 51. Shell; 52. Front-end filter screen; 53. Rear-end filter screen; 531. Filter hole; 532. Groove; 54. Receiving hopper; 541. Receiving cavity; 542. Baffle; 55. Unblocking disc; 550. Inclined surface; 551. Connector; 552. Unblocking plate; 553. Unblocking column; 554. Flow channel; 555. Fixing column; 556. Spring; 56. Support plate; 57. Baffle; 7. Top block; 71. Connecting frame; 8. Drive assembly; 81. Metal hose; 82. Steel wire rope; 83. Motor; 84. Connecting arm; 85. Fixing block; 86. Arc-shaped guide plate. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Refer to the instruction manual appendix Figures 1-10 A refrigeration device with anti-clogging function includes a compressor 1, a condenser 2, a throttle valve 3 and an evaporator 4 connected in sequence from end to end. The condenser 2 and the throttle valve 3 are connected by a dryer filter 5.

[0031] It should be noted that after the refrigeration equipment starts and enters the refrigeration cycle, the compressor 1 draws in low-temperature, low-pressure gaseous refrigerant and converts it into high-temperature, high-pressure gaseous refrigerant through compression. The high-temperature, high-pressure working fluid is sent to the condenser 2 to exchange heat with the outside environment, release heat, and cool and liquefy to form high-pressure liquid refrigerant. The liquid refrigerant flows through the dryer filter 5 between the condenser 2 and the throttling valve 3, where it intercepts solid impurities such as pipeline welding slag and metal shavings, and the molecular sieve drying core 50 adsorbs free moisture in the refrigerant. After impurity removal and drying, the high-pressure liquid refrigerant enters the throttling valve 3, where it is throttled, depressurized, and cooled to form a low-temperature, low-pressure gas-liquid mixed refrigerant. The mixed refrigerant flows into the evaporator 4 to fully absorb ambient heat and completely vaporize, turning back into a low-temperature, low-pressure gaseous refrigerant and flowing back to the compressor 1 in a continuous cycle. This continuous transfer of heat from the low-temperature area achieves stable refrigeration, ensuring long-term stable operation in low-temperature scenarios such as cold chain storage, food processing, and low-temperature preservation.

[0032] In this embodiment, as Figures 4-8As shown, the dryer filter 5 includes a housing 51. Two front-end filter screens 52 and a rear-end filter screen 53 located below the two front-end filter screens 52 are fixedly installed inside the housing 51. A molecular sieve drying core 50 is filled between the two front-end filter screens 52. The surface of the rear-end filter screen 53 has a number of filter holes 531. There is a gap between the rear-end filter screen 53 and the front-end filter screen 52 located below it.

[0033] It should be noted that the upper and lower sets of front-end filter screens 52 can pre-intercept large solid impurities such as welding slag and large pieces of oxide scale remaining in the refrigeration pipeline, preventing large particles of debris from directly impacting the rear fine filter screen. The molecular sieve drying core 50 filled between the two layers of front-end filter screens 52 can fully adsorb the free water mixed in the refrigerant and matching refrigeration oil, preventing water from freezing and causing pipeline ice blockage under low-temperature conditions. The rear-end filter screen 53 arranged below the front-end filter screen 52 has a finer pore size, which can further intercept small impurities such as metal shavings and small sealing debris remaining after coarse filtration, preventing fine particles from entering the downstream throttling valve 3 and causing dirt blockage.

[0034] Furthermore, the rear filter screen 53 has several slots 532 in the circumferential direction, and a receiving hopper 54 is provided inside the slots 532. A draining disc 55 is provided below the rear filter screen 53. The draining disc 55 moves upward to push away impurities on the filter holes 531, and the receiving hopper 54 is used to collect impurities.

[0035] It should be noted that, as Figure 6 , Figures 8-9 As shown, there are four slots 532, but not limited to four. Each slot 532 has a receiving hopper 54 inside. The rear filter screen 53 is fixed to the inner wall of the housing 51. The receiving hopper 54 is fixed to the rear filter screen 53. The four receiving hoppers 54 can be installed together. For example, an installation component is set in the middle of the four receiving hoppers 54 to install and connect them to form a whole.

[0036] In the above technical solution, the drain plate 55 includes a connector 551. Several drain plates 552 are fixedly installed on the circumferential direction of the upper end of the connector 551. The several drain plates 552 are respectively located between adjacent receiving hoppers 54. Drain columns 553 corresponding to filter holes 531 are fixedly installed on the surface of the drain plates 552. The drain columns 553 are used to insert upward into the interior of the filter holes 531 to push away the impurities on the filter holes 531. The drain columns 553 are conical.

[0037] It should be noted that when unclogging the rear filter screen 53, the unclogging disc 55 moves upward, allowing the unclogging column 553 to insert into the filter hole 531 and push the impurities upward, thereby achieving the purpose of unclogging. The pushed-out impurities will gradually enter the receiving hopper 54 and be collected. When it is necessary to unclogging the rear filter screen 53 that is clogged with dirt, the unclogging disc 55 is raised as a whole, and the conical unclogging columns 553 on the unclogging disc 55, which match the filter holes 531 one by one, are simultaneously inserted upward into the filter holes 531 of the rear filter screen 53. The small impurities stuck on the inner wall of the filter hole 531 and blocking the flow channel are pushed upward and peeled off, thereby achieving the purpose of unclogging. Various small impurities that are pushed off from the filter hole 531 will gradually disperse and slide to the surroundings under the action of the refrigerant flowing downward, and finally fall into the receiving hopper 54 installed at the groove 532 of the rear filter screen 53 for unified collection.

[0038] Furthermore, such as Figure 8 As shown, the sidewall of the unblocking plate 552 is attached to the inner wall of the shell 51 and the sidewall of the receiving hopper 54, and the unblocking columns 553 are provided with flow channels 554.

[0039] It should be noted that after being filtered by the rear filter screen 53, the refrigerant flows downwards and can eventually flow downwards from the flow channel 554 and out from the outlet at the lower end of the housing 51.

[0040] When the refrigeration equipment is working, the refrigerant is filtered through the dryer filter 5. Specifically, the refrigerant flows into the housing 51 from the inlet at the top of the housing 51. First, it passes through the upper front filter screen 52 to filter out larger impurities. Then, it passes through the molecular sieve drying core 50 to adsorb the moisture in the refrigerant. Finally, it passes through the lower front filter screen 52 to filter out larger impurities a second time. The refrigerant, after being coarsely filtered from above, passes through the rear filter 53 for fine filtration, removing smaller impurities. As the system operates, the amount of impurities increases. It should be noted that the larger impurities mainly originate from welding slag in the pipeline, and their quantity is limited, so cleaning the front filter 52 is unnecessary. The smaller impurities mainly originate from metal shavings caused by mechanical wear, which are constantly generated. Therefore, the rear filter 53 is easily clogged, making it difficult for the refrigerant to participate in the circulation. Thus, the rear filter 53 needs to be treated. Since the housing 51 is generally a welded integral structure to prevent leakage, it is not easy to open holes to discharge impurities. Therefore, the above technical solution uses a method of pushing impurities out of the filter holes 531 to clear the filter holes 531. The impurities will gradually enter the receiving hopper 54. Of course, some pushed impurities will still enter the filter holes 531, but they will be pushed out again at intervals. This cycle continues, and a large amount of impurities will be collected by the receiving hopper 54, thereby achieving the purpose of preventing clogging.

[0041] It should also be noted that a gap is set between the rear filter screen 53 and the lower front filter screen 52. The purpose of this gap is to prevent the unblocking column 553 from squeezing the desiccant inside the molecular sieve drying core 50 when it pushes impurities upward, thus preventing the desiccant from breaking and pulverizing, which would lead to an increase in impurities and a decrease in water absorption capacity.

[0042] The above technical solution clears the blockage by pushing impurities out of the filter holes 531, thereby preventing the dryer filter 5 from becoming clogged. By using the method of collecting impurities, it is suitable for the structure of the shell 51 that is integrally welded and cannot discharge impurities.

[0043] Refer to the instruction manual appendix Figures 5-6 and Figures 8-9 As shown, when the refrigerant flows downward, it has a certain impact on the inside of the container 54. This impact will cause impurities in the container 54 to surge upward and return to the surface of the rear filter screen 53 to block the filter holes 531. In order to avoid the problem that the unblocking effect of the unblocking column 553 is negligible due to this phenomenon, the following technical solution is further proposed in this embodiment.

[0044] Specifically, the container 54 has a container cavity 541 inside, the depth of which is 20mm-50mm and the width of which is 2mm-5mm.

[0045] It should be noted that by setting the depth and width of the receiving cavity 541, the receiving cavity 541 forms a narrow and deep structure, and impurities are deposited at the bottom of the receiving cavity 541. This not only improves its ability to contain impurities, but also makes it more difficult for impurities to flow out from the inside of the receiving cavity 541 even when subjected to the impact of refrigerant.

[0046] Furthermore, a baffle 542 is provided directly above the receiving cavity 541, and the baffle 542 is fixedly connected to the inner wall of the receiving hopper 54.

[0047] It should be noted that when a baffle 542 is installed above the receiving cavity 541, the refrigerant rushes directly onto the baffle 542 instead of directly onto the opening at the top of the receiving cavity 541. As a result, the refrigerant flow rate at the opening of the receiving cavity 541 will be lower, thereby further reducing the outflow of impurities from inside the receiving cavity 541.

[0048] Furthermore, a baffle plate 57 is fixedly connected to the side wall of each slot 532.

[0049] It should be noted that, in order to ensure the filtration effect of the back-end filter 53, the number of slots 532 should not be too large, such as... Figure 6 , Figure 8 and Figure 10Four filters are provided. The rear filter screen 53 is located in the area between adjacent slots 532. The filter holes 531 occupy a large area. When the unblocking column 553 pushes out the impurities, the impurities are a long distance away from the receiving hopper 54. It takes a long time and many pushes for the impurities to enter and be collected. Therefore, a baffle plate 57 is provided. When the refrigerant flows downward and impacts the baffle plate 57, it will move downward along the baffle plate 57 and impact the surface of the rear filter screen 53, which plays a role in turbulence and impact. In this way, the impurities can enter the receiving hopper 54 more quickly and be collected. On the one hand, it improves the unblocking effect of the unblocking column 553, and on the other hand, it reduces the number of times the impurities clog.

[0050] Refer to the instruction manual appendix Figures 3-4 and Figures 6-9 As shown, this embodiment provides a driving method for driving the drain pan 55 to move vertically. Specifically, a support plate 56 is provided below the drain pan 55 and is fixedly installed with the housing 51. A fixing post 555 is fixedly installed at the bottom of the connector 551. The fixing post 555 is vertically movably inserted into the support plate 56. A spring 556 is sleeved on the outside of the fixing post 555. The spring 556 is used to reset the fixing post 555 downward.

[0051] It should be noted that the upper end of the spring 556 rests on the lower surface of the support plate 56, and the lower end of the spring 556 rests on the lower end of the fixing post 555. Thus, when the drain pan 55 is pushed upward, the lower end of the fixing post 555 is pushed by the spring 556, which can cause the drain pan 55 to return to its original position downward.

[0052] Furthermore, a top block 7 is slidably mounted on the support plate 56, and a connecting frame 71 is fixedly mounted on the top block 7. The bottom of the connecting piece 551 is provided with an inclined surface 550. When the top block 7 moves, the end of the top block 7 pushes the inclined surface 550, thereby causing the unclogging disc 55 to move upward.

[0053] It should be noted that when the top block 7 moves horizontally, the end of the top block 7 can push the inclined surface 550, thereby causing the connecting piece 551 to drive the entire drain plate 55 to move upward. When the top block 7 is reset, the spring 556 pushes the drain plate 55 to reset downward.

[0054] In this embodiment, as Figures 5-8 and Figure 10As shown, a drive assembly 8 is installed on the housing 51. The drive assembly 8 includes a metal flexible tube 81 that is fixedly installed on the outer wall of the housing 51 and communicates with the inner side of the bottom of the housing 51. The free end of the metal flexible tube 81 is a closed structure. A steel wire rope 82 is fixedly connected to the connecting frame 71. The end of the steel wire rope 82 away from the connecting frame 71 is fixedly connected to the free end of the metal flexible tube 81. The steel wire rope 82 is attached to the inner wall of the metal flexible tube 81. When the metal flexible tube 81 bends back and forth to both sides, the position of the metal flexible tube 81 where the steel wire rope 82 is located switches back and forth between the innermost and outermost sides.

[0055] Furthermore, the drive assembly 8 also includes a motor 83 and a connecting arm 84. The motor 83 is fixedly installed on the housing 51, one end of the connecting arm 84 is fixedly connected to the output end of the motor 83, and the other end of the connecting arm 84 is hinged to one side of the free end of the metal hose 81.

[0056] It should be noted that when the motor 83 drives the connecting arm 84 to rotate, the free end of the metal hose 81 can be swung downwards or upwards through the end of the connecting arm 84. In the initial state where the drain pan 55 is not moving upwards, the free end of the metal hose 81 is at its uppermost position, and at this time, the steel wire rope 82 is attached to the innermost side of the inner wall of the metal hose 81. Several fixing blocks 85 are fixed to the innermost side of the inner wall of the metal hose 81, and the steel wire rope 82 passes through these fixing blocks 85. The function of the fixing blocks 85 is to keep the metal hose 81 attached to a fixed position on the inner wall of the metal hose 81.

[0057] Motor 83 drives the free end of metal hose 81 to swing downwards or upwards via connecting arm 84, causing metal hose 81 to bend back and forth to both sides, switching the position of metal hose 81 between the innermost and outermost sides where wire rope 82 is located. This means: (The text abruptly ends here, so the translation stops as well.) Figure 5 As shown, the motor 83 can drive the free end of the metal hose 81 to swing to the uppermost and lowermost sides. When it is at the uppermost side, the wire rope 82 is attached to the innermost side of the bend of the metal hose 81. When it swings to the lowermost side, the wire rope 82 is still attached to the same position of the metal hose 81. The difference is that the wire rope 82 is attached to the outermost side of the bend of the metal hose 81, that is, the innermost side of the bend is transformed into the outermost side of the bend.

[0058] In this way, when the metal hose 81 swings from the top to the bottom, the free end of the metal hose 81 will have a stretching effect on the wire rope 82, thereby causing the wire rope 82 to pull the connecting frame 71 and the top block 7 to move, and causing the end of the top block 7 to push the inclined surface 550 to move the unblocking disc 55 upward.

[0059] In the above technical solution, it is fixed to the housing 51 by welding and communicates with the interior of the housing 51, allowing refrigerant to enter, but preventing refrigerant leakage from the metal hose 81. By designing to drive the movement of the drain plate 55 by swinging the metal hose 81, it is suitable for the closed application of the dryer filter 5 in this refrigeration equipment. It can both drive the drain plate 55 to move for unblocking, isolate it from the outside, and prevent internal refrigerant leakage.

[0060] It should also be noted that the inlet and outlet of the housing 51 are welded to the pipeline by welding, and the housing 51 as a whole is a seamless welded structure. By designing the drive component 8, one end of the metal hose 81 is fixed to the housing 51 by welding, and the other end of the metal hose 81 is a closed structure. The housing 51 and the metal hose 81 are also a seamless welded structure. Since the refrigerant flowing through the housing 51 is in a high-pressure state, the above-mentioned seamless welded structure can achieve the driving function without the need for any dynamic or static sealing structure, thereby eliminating the leakage problems that are prone to occur caused by dynamic or static sealing structures.

[0061] The metal hose 81 is a metal braided hose, mainly composed of an inner layer and an outer layer. The inner layer is a continuous metal corrugated core tube, and the outer layer is a metal braided mesh to enhance pressure resistance and prevent leakage under high pressure. The metal hose 81 is generally open at both ends after production. After the steel wire rope 82 and fixing block 85 are installed inside the metal hose 81, a cover plate is installed at the free end of the metal hose 81. This cover plate is welded to one end of the steel wire rope 82, and then the cover plate is welded to the free end of the metal hose 81 to form an end-sealing structure. Finally, the other end of the metal hose 81 is welded and fixed to the housing 51. The metal hose 81 can be welded before the housing 51 is welded. This is to facilitate the adjustment of the steel wire rope 82 to a suitable length when welding the steel wire rope 82 to the connecting frame 71 at the unwelded position at the bottom of the housing 51.

[0062] Furthermore, such as Figure 4 and Figure 5 As shown, both sides of the metal hose 81 are provided with arc-shaped guide plates 86 that are fixedly connected to the housing 51. When the metal hose 81 bends to both sides, it can fit into the two arc-shaped guide plates 86 respectively.

[0063] It should be noted that the two arc-shaped guide plates 86 can support the metal hose 81, so that the metal hose 81 can form a regular arc shape before and after swinging.

[0064] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A refrigeration appliance having an anti-clogging function, characterized by: It includes a compressor (1), a condenser (2), a throttle valve (3) and an evaporator (4) connected in sequence from end to end, and the condenser (2) and the throttle valve (3) are connected by a dryer filter (5); The drying filter (5) includes a housing (51), inside which two front-end filter screens (52) and a rear-end filter screen (53) located below the two front-end filter screens (52) are fixedly installed. A molecular sieve drying core (50) is filled between the two front-end filter screens (52). The surface of the rear-end filter screen (53) has a plurality of filter holes (531). There is a gap between the rear-end filter screen (53) and the front-end filter screen (52) located below it. The rear filter screen (53) has several slots (532) in the circumferential direction. The slots (532) are provided with a receiving hopper (54). A draining disc (55) is provided below the rear filter screen (53). The draining disc (55) moves upward to push away impurities on the filter holes (531). The receiving hopper (54) is used to collect impurities.

2. The refrigeration appliance with anti-blocking function according to claim 1, characterized in that: The drain tray (55) includes a connector (551). Several drain plates (552) are fixedly installed on the circumferential direction of the upper end of the connector (551). The several drain plates (552) are located between adjacent receiving hoppers (54). Drain columns (553) corresponding to filter holes (531) are fixedly installed on the surface of the drain plates (552). The drain columns (553) are used to insert upward into the interior of the filter holes (531) to push away impurities on the filter holes (531). The drain columns (553) are conical.

3. A refrigeration device with anti-clogging function according to claim 2, characterized in that: The sidewall of the unblocking plate (552) is attached to the inner wall of the shell (51) and the sidewall of the receiving hopper (54), and a flow channel (554) is provided between the unblocking columns (553).

4. A refrigeration device with anti-clogging function according to claim 3, characterized in that: The container (54) has a container cavity (541) inside, the depth of which is 20mm-50mm and the width of which is 2mm-5mm.

5. A refrigeration device with anti-clogging function according to claim 4, characterized in that: Below the drain pan (55) is a support plate (56) that is fixedly installed with the housing (51). A fixing post (555) is fixedly installed at the bottom of the connector (551). The fixing post (555) is vertically movably inserted into the support plate (56). A spring (556) is sleeved on the outside of the fixing post (555). The spring (556) is used to reset the fixing post (555) downward.

6. A refrigeration device with anti-clogging function according to claim 5, characterized in that: A top block (7) is slidably mounted on the support plate (56), and a connecting frame (71) is fixedly mounted on the top block (7). An inclined surface (550) is provided at the bottom of the connecting piece (551). When the top block (7) moves, the end of the top block (7) pushes the inclined surface (550), thereby causing the unclogging disc (55) to move upward.

7. A refrigeration device with anti-clogging function according to claim 6, characterized in that: A drive assembly (8) is installed on the housing (51). The drive assembly (8) includes a metal hose (81) fixedly installed on the outer wall of the housing (51) and communicating with the inner bottom of the housing (51). The free end of the metal hose (81) is a closed structure. A steel wire rope (82) is fixedly connected to the connecting frame (71). The end of the steel wire rope (82) away from the connecting frame (71) is fixedly connected to the free end of the metal hose (81). The steel wire rope (82) is attached to the inner wall of the metal hose (81). When the metal hose (81) bends back and forth to both sides, the position of the metal hose (81) located on the steel wire rope (82) switches back and forth between the innermost and outermost sides.

8. A refrigeration device with anti-clogging function according to claim 7, characterized in that: The drive assembly (8) also includes a motor (83) and a connecting arm (84). The motor (83) is fixedly installed on the housing (51). One end of the connecting arm (84) is fixedly connected to the output end of the motor (83), and the other end of the connecting arm (84) is hinged to one side of the free end of the metal hose (81).

9. A refrigeration device with anti-clogging function according to claim 8, characterized in that: Both sides of the metal hose (81) are provided with arc-shaped guide plates (86) that are fixedly connected to the housing (51). When the metal hose (81) bends to both sides, it can fit into the two arc-shaped guide plates (86) respectively.

10. A refrigeration device with anti-clogging function according to claim 4, characterized in that: Each slot (532) has a baffle (57) fixedly connected to its side wall, and a baffle (542) is provided directly above the receiving cavity (541), and the baffle (542) is fixedly connected to the inner wall of the receiving hopper (54).

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