Circulating air curtain structure and refrigerator

Abstract

The application relates to the technical field of refrigerator air curtain technology, and particularly discloses a circulating air curtain structure and a refrigerator, which comprises a shunt box and multiple filter units, multiple shunt cavities are arranged in the shunt box, and the multiple filter units are respectively installed in the multiple shunt cavities; the filter unit comprises a filter piece, the filter piece comprises a rotating shaft, two mounting racks, two partition plates, two first positioning structures, two second positioning structures and two filter structures; the rotating shaft is rotationally connected in the shunt cavity through a one-way bearing; the two first positioning structures are respectively installed on the two mounting racks; cold air passes through one of the filter structures and is filtered by the filter structure; when the filter structure is blocked, negative pressure generated in the air duct can drive the filter piece to rotate counterclockwise, so that the positions of the two filter structures are exchanged; the circulating air curtain structure and the refrigerator can exchange the positions of the two filter structures, and effectively avoid affecting the uniformity and stability of the air curtain airflow.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerator air curtain, in particular to a circulating air curtain structure and a refrigerator. BACKGROUND

[0002] The refrigerator with circulating air curtain forms a heat insulation barrier by continuously blowing cold air, like an invisible "cold air curtain", which effectively isolates the air inside and outside the cabinet. It uses a back fan and a multi-air duct air supply system to make the cold air circulate evenly in the cabinet, making the temperature distribution more uniform, with a temperature difference of less than 3 degrees Celsius, significantly reducing the loss of cold air and reducing energy consumption by about 30% compared to traditional refrigerators. It can provide the best preservation environment for fruits and vegetables, dairy products, beverages, etc., and prolong the preservation period of food.

[0003] A refrigerator and a control method thereof are disclosed in Chinese patent document CN105650963B, which includes a cabinet and a door body for opening or closing the opening part of the cabinet. The cabinet is provided with a circulating air duct, and the circulating air duct is provided with an evaporator, a first fan and a second fan. One end of the circulating air duct is provided with an air inlet, and the other end of the circulating air duct is respectively provided with first and second air outlets. The airflow from the first air outlet forms a first air curtain at the opening part of the cabinet, and the airflow from the second air outlet forms a second air curtain at the opening part of the cabinet. The first air curtain is located outside the second air curtain, and the temperature of the second air curtain is higher than that of the first air curtain. When the refrigerator door body is in a closed state, the first fan can suck air from the first and second air outlets into the circulating air duct, and then discharge from the air inlet of the circulating air duct, so that the air in the cabinet circulates. When the refrigerator door body is in an open state, the second fan can suck air from the air inlet of the circulating air duct into the circulating air duct, and then discharge from the first and second air outlets, so that a double-layer air curtain is formed near the cabinet frame at the opening part of the cabinet.

[0004] When the refrigerator door body is in a closed state, the second fan is closed, and the first fan sucks air, so that the air enters the circulating air duct from the first and second air outlets, then passes through the evaporator and is discharged into the cabinet from the air inlet of the circulating air duct, so that the air in the cabinet circulates. By continuous circulation, the temperature and humidity in the cabinet are maintained; when the refrigerator door body is in an open state, the first fan is closed, and the second fan sucks air, so that the air enters the circulating air duct from the air inlet of the circulating air duct, then passes through the evaporator and is discharged from the first and second air outlets, respectively, to form the first and second air curtains near the cabinet frame at the opening part of the cabinet, blocking the direct exchange of temperature and humidity between the inside and outside, reducing the water vapor formed outside the cabinet from entering the cabinet. Because the temperature of the second air curtain is higher than that of the first air curtain, the first air curtain on the outside will form a cold water vapor layer after meeting the hot and humid air outside due to its low temperature, containing a large amount of water vapor, and the second air curtain on the inside with higher temperature can form a layer of protection.

[0005] However, the above patent document also has the following shortcomings: In order to prevent external dust from entering the cabinet along with the air and spreading along with the cold air circulation during the operation of the refrigerator, a filter screen is usually arranged in the air curtain system to filter particulate matters in the air. However, with the extension of use time, dust will gradually accumulate on the surface of the filter screen, causing partial or complete blockage of the filter holes. Since the blocked area is often not easy to be intuitively observed by the staff, if it is not cleaned and maintained in time, it will cause the local return air resistance to increase, affecting the uniformity and stability of the air curtain airflow, and further destroying the continuity of the sealing effect of the air curtain, reducing the ability to block the invasion of external hot and humid air. SUMMARY

[0006] The present application provides a circulating air curtain structure and a refrigerator, which aims to solve the problem in the related art that the surface of the filter screen gradually accumulates dust, causing partial or complete blockage of the filter holes, causing the local return air resistance to increase, and affecting the uniformity and stability of the air curtain airflow.

[0007] The circulating air curtain structure of the present application comprises an air curtain mechanism, the air curtain mechanism comprising an air duct, and a filtering mechanism, the filtering mechanism comprising a shunt box and a plurality of filter units, the shunt box being installed in the air duct, a plurality of shunt cavities being arranged in the shunt box, and the plurality of filter units being respectively installed in the plurality of shunt cavities, the filter unit comprising a filter piece, the filter piece comprising a rotating shaft, two mounting brackets, two partition plates, two positioning structures one, two positioning structures two and two filtering structures, the rotating shaft being rotatably connected in the shunt cavity through a one-way bearing, the two mounting brackets and the two partition plates being connected to the rotating shaft, and the two mounting brackets and the two partition plates being alternately arranged, the two positioning structures one being respectively installed on the two mounting brackets, two positioning holes one being arranged in the shunt cavity and cooperating with the two positioning structures one, the filter piece being positioned by the cooperation of the two positioning structures one and the two positioning holes one, and the two filtering structures being connected to the two mounting brackets through the two positioning structures two, cold air passing through one of the filtering structures and being filtered by it, and the negative pressure generated in the air duct after the filtering structure is blocked being able to drive the filter piece to rotate counterclockwise, so as to exchange the positions of the two filtering structures.

[0008] Beneficial effects: after the cold wind generated by the starting air curtain mechanism, the cold wind passes through multiple distribution cavities, and the cold wind passing through the distribution cavities is filtered by one of the filter structures on the filter, and the dust in the cold wind is intercepted through the filter structure. When the filter structure is blocked, the air volume is reduced, so that a negative pressure is generated in the air duct. When the negative pressure in the air duct increases to a certain degree, the filter can be driven to rotate counterclockwise by the negative pressure in the air duct, and the two positioning structures are separated from the two positioning holes, respectively, until the filter rotates counterclockwise by 180 degrees, and the two positioning structures are again inserted and positioned with the two positioning holes, respectively, so as to exchange the positions of the two filter structures, so as to facilitate the cleaning and replacement of the blocked part of the filter, and effectively avoid affecting the uniformity and stability of the air curtain airflow.

[0009] Preferably, the filter structure comprises a mounting frame and a filter screen, and the mounting frame is limitingly and slidingly connected in the mounting bracket, and the filter screen is connected in the mounting frame.

[0010] Its effect is that the dust in the cold air can be filtered through the filter screen to prevent the dust from circulating and spreading with the cold air.

[0011] Preferably, the positioning structure one comprises a positioning part one and an elastic part one, the positioning part one is connected with the mounting bracket through the elastic part one, and the positioning part one can be inserted into the positioning hole one, and the positioning structure two comprises a positioning part two and an elastic part two, the positioning part two is connected with the mounting frame through the elastic part two, the mounting bracket is provided with a positioning hole two, and the positioning part two can be inserted into the positioning hole two.

[0012] Its effect is that the mounting bracket and the partition plate can be positioned through the cooperation of the elastic part one and the positioning part one, so that the two filter structures are horizontally arranged, the two partition plates can separate the distribution cavities, so that the two filter structures are arranged separately, and then the cold air can only pass through one of the filter structures.

[0013] Preferably, the distribution cavity is provided with a guide groove, the guide groove comprises a small arc segment, an inclined segment, a horizontal segment one, a large arc segment and a horizontal segment two, the small arc segment, the inclined segment, the horizontal segment one, the large arc segment and the horizontal segment two are sequentially communicated, and the small arc segment, the inclined segment, the horizontal segment one, the large arc segment and the horizontal segment two are arranged counterclockwise.

[0014] Preferably, the filter unit further comprises a shielding piece, the shielding piece comprises a shielding part, a sliding part, a rebound part and a positioning structure three, the sliding part is limitingly and slidingly connected on the mounting frame, the shielding part is connected between the mounting frame and the sliding part, the rebound part is connected between the sliding part and the mounting frame, the positioning structure three is connected on the mounting frame, the sliding part is provided with a positioning hole three, the positioning structure three can be arranged in cooperation with the positioning hole three and positioned on the sliding part, so that the rebound part is in a compressed state, and one end of the sliding part is inserted into the small arc segment.

[0015] The effect is that the filter rotates to drive the sliding part to move along the small arc segment, and the rebound part is in a compressed state at this time. When the sliding part passes through the inclined segment, the sliding part is guided by the inclined segment to slide on the mounting frame and disengage from the positioning structure. At this time, the rebound part pushes the sliding part to move along the horizontal segment to the large arc segment, so that the sliding part unfolds the shielding part and shields the filter screen, reduces the ventilation of the filter screen, further enhances the negative pressure in the air duct, and enhances the driving force of the filter counterclockwise rotation.

[0016] Preferably, the filter unit further comprises a pushing member, the pushing member comprising a pushing part, an elastic part four, a fixed part, an elastic part five, a guide part one and a guide part two, the pushing part is inserted into the mounting frame, the elastic part four is connected between the pushing part and the mounting frame, the fixed part is slidingly connected to the mounting frame, the elastic part five is connected between the fixed part and the mounting frame, and the fixed part is inserted into the pushing part to compress the elastic part four. The guide part one and the guide part two are connected in the shunt cavity, the guide part two is arc-shaped, and an arc-shaped slope is arranged on the guide part two, and the arc-shaped slope has a highest point and a lowest point.

[0017] The effect is that when the filter rotates counterclockwise, the pushing part and the fixed part move along a circular trajectory. When the fixed part passes through the guide part one, the fixed part is guided by the guide part one, so that the fixed part moves and unlocks the pushing part. At this time, the elastic part four drives the pushing part to tightly contact the highest point of the arc-shaped slope, and continuously applies a pushing force to the pushing part through the elastic part four, so that the pushing part moves along the arc-shaped slope towards the lowest point, thereby enhancing the driving force of the filter counterclockwise rotation.

[0018] Preferably, the filter unit further comprises two locking members, the two locking members are respectively connected to the two mounting frames, and a locking hole is arranged in the shunt cavity. The locking member comprises a locking part and an elastic part six, the locking part is slidingly connected to the mounting frame, and the elastic part six is connected between the locking part and the mounting frame. The locking part can be inserted into the locking hole.

[0019] The effect is that when the filter structure is installed on the mounting frame, the mounting frame can push the locking part to shrink into the mounting frame, compress the elastic part six, and be positioned by the positioning structure two, so that the elastic part six is in a compressed state. When the blocked filter structure is disassembled, pull the filter structure to make the elastic part six push the locking part to move until the locking part is inserted into the locking hole, thereby locking the filter, avoiding the disassembly of the filter structure from causing the filter to rotate and misalign, so as to facilitate the subsequent installation of the cleaned filter structure.

[0020] Preferably, the shunt box is provided with a mounting opening matched with the plurality of shunt cavities, and a maintenance door is installed in the mounting opening. The inner bottom wall of the mounting opening is inclined, and a sliding groove is arranged on the inner bottom wall of the mounting opening.

[0021] Preferably, the filtering unit further comprises a display member, the display member comprising a baffle and a ball, the baffle being movable in the mounting opening, the baffle being capable of separating the chute into a high section and a low section, the ball being disposed in the high section and being in contact with the baffle.

[0022] The effect is that when the filtering member rotates counterclockwise, the baffle is pushed upward by the partition to make the baffle no longer block the ball, at this time, the ball can roll from the high section to the low section of the chute, and the worker can observe the position of the ball in the chute to determine whether there is a filtering structure in the filtering unit that needs to be cleaned, so as to facilitate the worker to clean the blocked filtering structure in time.

[0023] The application further provides a refrigerator equipped with the circulating air curtain structure.

[0024] Beneficial effect: After the refrigerator is opened, the temperature inside the refrigerator is reduced, so that the air force formed by the circulating air curtain structure is cold air. When the refrigerator is opened to take the items inside, a heat insulation barrier is formed by the continuously blown cold air, so that the air outside the refrigerator is effectively isolated. Part of the dust carried in the air enters the cold air, and the dust is carried by the cold air to flow. After the cold air enters the air duct, the dust is intercepted by the plurality of filtering units located in the air duct, and at this time only one of the filtering structures in the filtering unit filters the dust. With the passage of time, the filtering structure is gradually blocked, the ventilation volume is reduced, and negative pressure is generated in the air duct. When the negative pressure increases to a certain degree, the filtering unit is driven to rotate, and the positions of the two filtering structures are exchanged, so as to facilitate the cleaning and replacement of the blocked part of the filtering member, effectively avoiding the influence on the uniformity and stability of the air curtain flow.

[0025] The beneficial effect of the application is:

[0026] 1. When the dust in the cold air is treated, the cold air flows through the shunt cavity and is filtered by one of the filtering structures on the filtering member. When the filtering structure is blocked, the ventilation volume is reduced, and negative pressure is generated in the air duct. When the negative pressure in the air duct increases to a certain degree, the negative pressure in the air duct can drive the filtering member to rotate counterclockwise, so as to exchange the positions of the two filtering structures, facilitate the cleaning and replacement of the blocked part of the filtering member, and effectively avoid the influence on the uniformity and stability of the air curtain flow.

[0027] 2. The filter rotates and drives the sliding part to move along the small arc segment, at this time the rebound part is in a compressed state, when the sliding part passes through the inclined segment, the sliding part is guided by the inclined segment to slide on the mounting frame and disengage from the positioning structure three, at this time the rebound part drives the sliding part to move along the horizontal segment one to the large arc segment, so that the sliding part unfolds the shielding part and shields the filter screen, reduces the ventilation of the filter screen, further enhances the negative pressure in the air duct, and enhances the driving force of the filter counterclockwise rotation.

[0028] 3. When the filter rotates, the pushing part and the fixed part move along the circular track, when the fixed part passes through the guide part one, the fixed part is guided by the guide part one, so that the fixed part moves and releases the locking of the pushing part, at this time the elastic part four drives the pushing part to tightly contact the highest point of the arc slope, and the elastic part four continuously applies a pushing force to the pushing part, so that the pushing part moves along the arc slope towards the lowest point, thereby enhancing the driving force of the filter counterclockwise rotation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective structural schematic diagram of the present application.

[0030] Figure 2 is a front view structural schematic diagram of the present application.

[0031] Figure 3 is a side view cross-sectional structural schematic diagram of the present application.

[0032] Figure 4 is a side view cross-sectional perspective structural schematic diagram of the present application.

[0033] Figure 5 is a side view cross-sectional structural schematic diagram of the refrigeration containing mechanism of the present application.

[0034] Figure 6 is a perspective structural schematic diagram of the filter mechanism of the present application.

[0035] Figure 7 is a side view cross-sectional structural schematic diagram of the filter mechanism of the present application.

[0036] Figure 8 is a perspective structural schematic diagram of the filter, shielding part and pushing part of the present application.

[0037] Figure 9 is a cross-sectional structural schematic diagram of the filter of the present application.

[0038] Figure 10 is another cross-sectional structural schematic diagram of the filter of the present application.

[0039] Figure 11 is a side view cross-sectional structural schematic diagram of the flow divider box of the present application.

[0040] Figure 12 is a schematic diagram of a top view of a filter of the present application.

[0041] Figure 13 is a schematic diagram of a side view of a pusher of the present application.

[0042] Figure 14 is a schematic diagram of a perspective view of a guide part two of the present application.

[0043] Figure 15 is a schematic diagram of a side view of a flow distribution box and a display part of the present application.

[0044] Figure 16 is a schematic diagram of a front view of a flow distribution box and a display part of the present application.

[0045] Reference signs:

[0046] 1, a refrigeration containing mechanism; 11, a cabinet body; 12, a containing part; 13, a cabinet door; 14, a refrigeration part; 15, a vertical plate; 2, a wind curtain mechanism; 21, an air duct; 22, a mounting seat; 23, a fan; 24, a grid plate; 25, a guide plate; 3, a filtering mechanism; 31, a flow distribution box; 311, a flow distribution cavity; 312, a guide groove; 313, a mounting opening; 314, a sliding groove; 32, a filter; 321, a rotating shaft; 322, a mounting frame; 323, a partition plate; 324, a first positioning part; 325, a first elastic part; 326, a mounting frame; 327, a second positioning part; 328, a second elastic part; 329, a filter screen; 33, a shielding part; 331, a shielding part; 332, a sliding part; 333, a rebounding part; 334, a third positioning part; 335, a third elastic part; 34, a pusher; 341, a pushing part; 342, a fourth elastic part; 343, a fixing part; 344, a fifth elastic part; 345, a first guide part; 346, a second guide part; 347, a sealing cover; 348, a sealing part; 35, a locking part; 351, a locking part; 352, a sixth elastic part; 36, a display part; 361, a baffle; 362, a ball. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0048] As shown in Figures 3 to 16 , the circulating wind curtain structure of the present application comprises a wind curtain mechanism 2 and a filtering mechanism 3, the wind curtain mechanism 2 is installed in the refrigerator, the filtering mechanism 3 is installed in the wind curtain mechanism 2, the wind curtain mechanism 2 can form a circulating wind curtain, so that the cold air circulates uniformly in the refrigerator, and the filtering mechanism 3 can filter the circulating cold air to remove dust and impurities in the cold air, preventing dust from spreading with the circulating cold air.

[0049] As Figures 3 to 5 shown, the air curtain mechanism 2 comprises an air duct 21, a mounting seat 22, a fan 23, a grid plate 24 and a guide plate 25, the air duct 21 is arranged in the refrigerator, the top end of the air duct 21 is provided with an air outlet, the bottom end of the air duct 21 is provided with an air return port, the mounting seat 22 is mounted in the air duct 21, the fan 23 is arranged in multiple, the multiple fans 23 are all mounted on the mounting seat 22, starting the multiple fans 23 can make the cold air in the air duct 21 be discharged from the air outlet of the air duct 21, the discharged cold air enters from the air return port of the air duct 21 to form a circulating air curtain, the grid plate 24 is installed at the air return port of the air duct 21, which is used to block the large volume objects from entering the air duct 21, and the guide plate 25 is connected at the air return port of the air duct 21, which is used to guide the cold air to enter the filtering mechanism 3.

[0050] As Figures 3 to 16 shown, the filtering mechanism 3 comprises a shunt box 31 and multiple filtering units, the shunt box 31 is connected in the air duct 21, the shunt box 31 can be used to shunt the returned cold air, the multiple filtering units are all mounted in the shunt box 31, the filtering unit comprises a filtering piece 32, a shielding piece 33, a pushing piece 34, a locking piece 35 and a display piece 36, the filtering piece 32 is connected in the shunt box 31, the filtering piece 32 can be used to filter the dust in the cold air, the shielding piece 33 is connected on the filtering piece 32, when the filtering piece 32 is blocked in a large area, the ventilation volume of the filtering piece 32 is reduced, so that the negative pressure is generated in the air duct 21, at this time, the negative pressure in the air duct 21 can drive the filtering piece 32 to rotate counterclockwise, so that the staff can be aware of the cleaning and replacement of the blocked part of the filtering piece 32, thereby avoiding affecting the uniformity and stability of the air curtain airflow, after the filtering piece 32 rotates counterclockwise by a certain angle, the shielding piece 33 is driven to shield the filtering piece 32, further reducing the ventilation volume of the filtering piece 32, increasing the negative pressure in the air duct 21, and accelerating the speed of the counterclockwise rotation of the filtering piece 32, the pushing piece 34 is connected on the shunt box 31 and the filtering piece 32, the pushing piece 34 can be triggered after the filtering piece 32 rotates counterclockwise by a certain angle, the pushing piece 34 applies a pushing force to drive the counterclockwise rotation of the filtering piece 32, so as to facilitate the counterclockwise rotation of the filtering piece 32, the locking piece 35 is connected on the filtering piece 32, the remaining part of the filtering piece 32 can be locked by the locking piece 35 when the blocked part of the filtering piece 32 is removed, avoiding affecting the normal use of the remaining part during the disassembly process, the display piece 36 is installed on the shunt box 31, the display piece 36 can be actuated when the filtering piece 32 rotates counterclockwise, and the display piece 36 prompts the staff that the filtering piece 32 in the filtering unit needs to be cleaned.

[0051] Continue to refer to Figures 3 to 16As shown, the shunt box 31 is provided with a plurality of shunt cavities 311, a plurality of filter units are respectively installed in the plurality of shunt cavities 311, and the cold air entering the return air inlet of the air duct 21 can enter the plurality of shunt cavities 311 under the action of the air deflector 25 and be filtered by the filter units in the shunt cavities 311. The front side of the shunt box 31 is provided with a plurality of mounting ports 313, and the plurality of mounting ports 313 are respectively arranged corresponding to the plurality of shunt cavities 311. The mounting ports 313 are used for facilitating the installation and removal of the filter units. The mounting ports 313 are provided with access doors made of transparent material (not shown in the figure). The mounting ports 313 can be sealed by the access doors.

[0052] With reference to the foregoing Figures 3 to 16 As shown, the filter 32 includes a rotating shaft 321, a mounting bracket 322, a partition plate 323, a first positioning structure, a second positioning structure, and a filter structure. The rotating shaft 321 is rotatably connected in the shunt cavity 311 by a one-way bearing, so that the rotating shaft 321 can only rotate counterclockwise. The mounting bracket 322, the partition plate 323, the first positioning structure, the second positioning structure, and the filter structure are all provided in two. The two mounting brackets 322 and the two partition plates 323 are connected to the rotating shaft 321, and the two mounting brackets 322 and the two partition plates 323 are alternately arranged. The first positioning structure is respectively connected to the two mounting brackets 322. The two filter structures are respectively installed on the two mounting brackets 322 by the two second positioning structures. The shunt cavity 311 is divided by the two partition plates 323, so that the cold air passing through the shunt cavity 311 is filtered by one of the filter structures. The inner wall of the shunt cavity 311 is provided with two positioning holes one corresponding to the two first positioning structures. The two mounting brackets 322 and the two filter structures are horizontally arranged by the cooperation of the positioning structure and the positioning hole one, and the stability of the filter structure in filtering the cold air is ensured.

[0053] With reference to the foregoing Figures 3 to 16 As shown, the first positioning structure includes a positioning part one 324 and an elastic part one 325. The positioning part one 324 is connected to the mounting bracket 322 by the elastic part one 325. The positioning part one 324 can be inserted into the positioning hole one, thereby positioning the mounting bracket 322. The filter structure includes a mounting frame 326 and a filter screen 329. The mounting frame 326 is limitingly and slidingly connected in the mounting bracket 322. The filter screen 329 is connected in the mounting frame 326. The dust in the cold air can be filtered by the filter screen 329. The second positioning structure includes a positioning part two 327 and an elastic part two 328. The positioning part two 327 is connected to the mounting frame 326 by the elastic part two 328. The mounting bracket 322 is provided with a positioning hole two. The positioning part two 327 can be inserted into the positioning hole two, thereby positioning the mounting frame 326 in the mounting bracket 322.

[0054] When the cold air is filtered, the cold air passes through the filter screen 329 in the rear filter structure, and the dust in the cold air is filtered by the filter screen 329. When the filter holes on the filter screen 329 are blocked, the air flow through the filter screen 329 is reduced, a negative pressure is generated in the air duct 21, the rotating shaft 321 is connected to the air duct 21 through the one-way bearing, so that the rotating shaft 321 can only rotate counterclockwise, and the filter element 32 is driven to rotate counterclockwise by 180 degrees by the negative pressure in the air duct 21. In this process, the two positioning structures one are respectively separated from the two positioning holes one, and after the positions of the two filter structures are exchanged, the two positioning structures one are again respectively inserted into the two positioning holes one, so that the positions of the two filter structures are exchanged, and the blocked filter structure can be disassembled and cleaned and then reinstalled.

[0055] With reference to the Figures 3 to 16 As shown in the figure, the shielding piece 33 comprises a shielding part 331, a sliding part 332, a rebound part 333 and a positioning structure three. The shielding part 331 is made of silica gel material, and the shielding part 331 is wavy. The sliding part 332 is limitingly and slidingly connected to the mounting frame 326. The two ends of the shielding part 331 are respectively connected to the mounting frame 326 and the sliding part 332. The rebound part 333 is connected between the sliding part 332 and the mounting frame 326. The positioning structure three is connected to the mounting frame 326. The sliding part 332 is provided with a positioning hole three. The positioning structure three can be matched with the positioning hole three, so as to position the sliding part 332. At this time, the rebound part 333 is in a compressed state. The positioning structure three comprises a positioning part three 334 and an elastic part three 335. The positioning part three 334 is connected to the mounting frame 326 through the elastic part three 335. The positioning part three 334 can be inserted into the positioning hole three on the sliding part 332. The inner wall of the shunt cavity 311 is provided with a guide groove 312. One end of the sliding part 332 is slidingly connected in the guide groove 312. The sliding part 332 can be guided through the guide groove 312. The guide groove 312 comprises a small arc segment, an inclined segment, a horizontal segment one, a large arc segment and a horizontal segment two. The small arc segment, the inclined segment, the horizontal segment one, the large arc segment and the horizontal segment two are sequentially communicated and arranged counterclockwise. When the sliding part 332 is not separated from the positioning structure three, it is slidingly connected in the small arc segment.

[0056] When the filter element 32 rotates, the sliding part 332 moves along the small arc segment. When the sliding part 332 passes through the inclined segment, the inclined segment guides the sliding part 332, so that the sliding part 332 slides on the mounting frame 326 and separates from the positioning structure three. At this time, the rebound part 333 pushes the sliding part 332 to move along the horizontal segment one to the large arc segment, so that the shielding part 331 is unfolded by the sliding part 332 and shields the filter screen 329, reduces the air flow of the filter screen 329, and further enhances the negative pressure in the air duct 21, and enhances the driving force of the counterclockwise rotation of the filter element 32.

[0057] With reference to the drawings Figures 1 to 16 As shown, the pushing member 34 comprises a pushing part 341, an elastic part four 342, a fixing part 343, an elastic part five 344, a guide part one 345, a guide part two 346, a sealing cover 347 and a sealing part 348, the pushing part 341 is inserted on the mounting frame 322, the elastic part four 342 is connected between the pushing part 341 and the mounting frame 322, the fixing part 343 is slidingly connected on the mounting frame 322, the elastic part five 344 is connected on the fixing part 343 and the mounting frame 322, the fixing part 343 can be inserted with the pushing part 341, so as to lock the pushing part 341, at this time, the elastic part four 342 is in a compressed state, the guide part one 345 and the guide part two 346 are both connected on the inner wall of the shunt cavity 311, the guide part one 345 can guide the fixing part 343, so that when the fixing part 343 passes through the guide part one 345, the fixing part 343 can move towards the direction away from the pushing part 341, so as to release the locking of the pushing part 341, the guide part two 346 is in an arc shape, the guide part two 346 is provided with an arc-shaped slope, the arc-shaped slope has a highest point and a lowest point, after the fixing part 343 releases the locking of the pushing part 341, the pushing part 341 can be driven to tightly contact the highest point of the arc-shaped slope by the elastic part four 342, and the elastic part four 342 continuously applies a pushing force to the pushing part 341, so that the pushing part 341 moves along the arc-shaped slope towards the lowest point, thereby applying a pushing force for the counterclockwise rotation of the filtering member 32, the sealing cover 347 is connected on the inner wall of the shunt cavity 311, the front side of the sealing cover 347 is provided with an opening, through which the pushing part 341 is pressed and reset by the staff, the sealing cover 347 can enhance the sealing performance of the partition plate 323 after separating the shunt cavity 311, and the sealing part 348 is connected on the rotating shaft 321, the sealing part 348 can seal the end of the sealing cover 347.

[0058] When the filtering member 32 rotates counterclockwise, the pushing part 341 and the fixing part 343 move along a circular track, when the fixing part 343 passes through the guide part one 345, the fixing part 343 is guided by the guide part one 345, so that the fixing part 343 moves towards the direction away from the pushing part 341, thereby releasing the locking of the pushing part 341, at this time, the pushing part 341 is driven to tightly contact the highest point of the arc-shaped slope by the elastic part four 342, and the elastic part four 342 continuously applies a pushing force to the pushing part 341, so that the pushing part 341 moves along the arc-shaped slope towards the lowest point, thereby enhancing the driving force for the counterclockwise rotation of the filtering member 32.

[0059] With reference to the drawings Figures 3 to 6As shown, the locking member 35 is provided in two, and the two locking members 35 are connected to the two mounting frames 322 respectively, and the inner wall of the shunt cavity 311 is provided with a locking hole, and the locking member 35 comprises a locking portion 351 and an elastic portion 352, the locking portion 351 is slidingly connected to the mounting frame 322, and the elastic portion 352 is connected between the locking portion 351 and the mounting frame 322, when the mounting frame 326 is inserted into the mounting frame 322, the locking portion 351 can be pushed to shrink into the mounting frame 322, and the elastic portion 352 is compressed, until the second positioning structure positions the mounting frame 326, so that the elastic portion 352 is in a compressed state, when it is necessary to clean the blocked filter structure, pull the mounting frame 326 in the filter structure from the mounting port 313, so that the mounting frame 326 drives the filter screen 329 to be cleaned to move outward from the mounting port 313, at this time, the elastic portion 352 pushes the locking portion 351 to move, so that the locking portion 351 is inserted with the locking hole on the inner wall of the shunt cavity 311, thereby locking the filter member 32, avoiding the dislocation of the filter member 32 caused by the rotation of the filter member 32 when the filter structure is disassembled, so as to facilitate the subsequent installation of the cleaned filter structure.

[0060] Continuing to refer to Figures 3 to 16 As shown, the inner bottom wall of the mounting port 313 is inclined, and the inner bottom wall of the mounting port 313 is provided with a sliding groove 314, and the display member 36 comprises a baffle 361 and a ball 362, the baffle 361 is hinged in the mounting port 313, and the baffle 361 can divide the sliding groove 314 into a high section and a low section, and the ball 362 is located in the high section and contacts the baffle 361, during the process of counterclockwise rotation of the filter member 32 by one hundred and eighty degrees, the baffle 361 can be pushed upward by the partition plate 323, so that the baffle 361 no longer blocks the ball 362, at this time, the ball 362 can move from the high section to the low section of the sliding groove 314, and the worker can observe the position of the ball 362 in the sliding groove 314 to determine whether there is a filter structure that needs to be cleaned in the filter unit, so as to facilitate the worker to clean the blocked filter structure in time, for the convenience of the worker's observation, the ball 362 can be red, yellow or green.

[0061] Working principle:

[0062] Start the fan 23, so that the cold air in the air duct 21 is discharged from the air outlet of the air duct 21, and the discharged cold air enters from the air return port of the air duct 21 to form a circulating air curtain, in this process, the cold air passing through the shunt cavity 311 is filtered by the filter screen 329 in the filter unit located in the rear filter structure, thereby filtering the dust in the cold air.

[0063] When the filter screen 329 in the rear filter structure is gradually blocked by dust in the cold wind, the air flow through the filter screen 329 is reduced, and a negative pressure is generated in the air duct 21. Since the rotating shaft 321 is connected to the air duct 21 through the one-way bearing, the rotating shaft 321 can only rotate counterclockwise, thereby driving the filter element 32 to rotate counterclockwise through the negative pressure in the air duct 21, and the two positioning structures one are respectively separated from the two positioning holes one.

[0064] When the filter element 32 rotates, the sliding part 332 moves along the small arc segment. When the sliding part 332 passes through the inclined segment, the inclined segment guides the sliding part 332, so that the sliding part 332 slides on the mounting frame 326 and separates from the positioning structure three. At this time, the rebound part 333 pushes the sliding part 332 to move along the horizontal segment one to the large arc segment, so that the sliding part 332 unfolds the shielding part 331 and shields the filter screen 329, reduces the air flow of the filter screen 329, further enhances the negative pressure in the air duct 21, and enhances the driving force of the counterclockwise rotation of the filter element 32.

[0065] When the filter element 32 rotates counterclockwise, the pushing part 341 and the fixed part 343 move along the circular track. When the fixed part 343 passes through the guide part one 345, the guide part one 345 guides the fixed part 343, so that the fixed part 343 moves away from the pushing part 341, thereby unlocking the pushing part 341. At this time, the elastic part four 342 drives the pushing part 341 to tightly contact the highest point of the arc slope, and the elastic part four 342 continuously applies a pushing force to the pushing part 341, so that the pushing part 341 moves along the arc slope to the lowest point, thereby enhancing the driving force of the counterclockwise rotation of the filter element 32.

[0066] During the counterclockwise rotation of the filter element 32, the partition plate 323 can push the baffle 361 to flip upward, so that the baffle 361 no longer blocks the ball 362. At this time, the ball 362 can move from the high segment to the low segment of the sliding groove 314.

[0067] After the filter element 32 rotates counterclockwise by one hundred and eighty degrees, the two positioning structures one are respectively inserted into the two positioning holes one again. At this time, the positions of the two filter structures are exchanged, and the staff can pull out the front filter structure from the mounting port 313 to separate the positioning structure two from the positioning hole two after observing the change in the position of the ball 362. At this time, the elastic part six 352 pushes the locking part 351 to move, so that the locking part 351 is inserted into the locking hole on the inner wall of the shunt cavity 311, thereby locking the filter element 32. After the blocked filter structure is cleaned, it can be installed back to the original position.

[0068] As Figures 1 to 16As shown, the application also provides a refrigerator, comprising a refrigeration containing mechanism 1, an air curtain mechanism 2 and a filtering mechanism 3, the refrigeration containing mechanism 1 comprises a cabinet 11, a containing part 12, a cabinet door 13, a refrigeration part 14 and a vertical plate 15, the air curtain mechanism 2 and the filtering mechanism 3 are both arranged in the cabinet 11, the containing part 12 is installed in the cabinet 11 and used for supporting the preserved articles, the cabinet door 13 is installed on the front side of the cabinet 11 and can seal the front side of the cabinet 11 when the preserved articles are not taken, the vertical plate 15 is connected to the containing part 12 and can block the preserved articles on the containing part 12 to prevent the preserved articles from falling from the front end of the containing part 12, and the refrigeration part 14 is installed in the cabinet 11 and used for refrigerating the air in the cabinet 11.

[0069] Although the embodiments of the application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and cannot be understood as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A circulating air curtain structure comprising an air curtain mechanism, the air curtain mechanism comprising an air duct, characterized in that, The filtering mechanism comprises a shunt box and a plurality of filtering units, the shunt box is installed in the air duct, a plurality of shunt cavities are arranged in the shunt box, and the plurality of filtering units are respectively installed in the plurality of shunt cavities; the filtering unit comprises a filter piece, the filter piece comprises a rotating shaft, two mounting racks, two partition plates, two positioning structures one, two positioning structures two and two filtering structures, the rotating shaft is rotatably connected in the shunt cavity through a one-way bearing, the two mounting racks and the two partition plates are connected on the rotating shaft, and the two mounting racks and the two partition plates are alternately arranged, the two positioning structures one are respectively installed on the two mounting racks, two positioning holes one are arranged in the shunt cavity and matched with the two positioning structures one, the filter piece is positioned by cooperation of the two positioning structures one and the two positioning holes one, and the two filtering structures are connected on the two mounting racks through the two positioning structures two; cold air passes through one of the filtering structures and is filtered by the filtering structure, and when the filtering structure is blocked, negative pressure generated in the air duct can drive the filter piece to rotate counterclockwise, so that the positions of the two filtering structures are exchanged; the filtering structure comprises a mounting frame and a filter screen, and the mounting frame is limitingly and slidingly connected in the mounting rack. The positioning structure one comprises a positioning part one and an elastic part one, the positioning part one is connected with the mounting rack through the elastic part one, and the positioning part one can be inserted into the positioning hole one; the positioning structure two comprises a positioning part two and an elastic part two, the positioning part two is connected with the mounting frame through the elastic part two, the mounting rack is provided with a positioning hole two, and the positioning part two can be inserted into the positioning hole two.

2. The circulating air curtain structure of claim 1, wherein, The shunt cavity is provided with a guide groove, the guide groove comprises a small arc segment, an inclined segment, a horizontal segment one, a large arc segment and a horizontal segment two, the small arc segment, the inclined segment, the horizontal segment one, the large arc segment and the horizontal segment two are sequentially communicated and arranged counterclockwise.

3. The circulating air curtain structure of claim 2, wherein, The filtering unit further comprises a shielding piece, the shielding piece comprises a shielding part, a sliding part, a rebound part and a positioning structure three, the sliding part is limitingly and slidingly connected on the mounting frame, the shielding part is connected between the mounting frame and the sliding part, the rebound part is connected between the sliding part and the mounting frame, the positioning structure three is connected on the mounting frame, the sliding part is provided with a positioning hole three, the positioning structure three can be matched with the positioning hole three and position the sliding part, so that the rebound part is in a compressed state, and one end of the sliding part is inserted into the small arc segment.

4. The circulating air curtain structure of claim 1, wherein, The filtering unit further comprises a pushing piece, the pushing piece comprises a pushing part, an elastic part four, a fixing part, an elastic part five, a guide part one and a guide part two, the pushing part is inserted into the mounting rack, the elastic part four is connected between the pushing part and the mounting rack, the fixing part is slidingly connected on the mounting rack, the elastic part five is connected between the fixing part and the mounting rack, the fixing part is inserted into the pushing part, so that the elastic part four is in a compressed state, the guide part one and the guide part two are connected in the shunt cavity, the guide part two is in an arc shape, the guide part two is provided with an arc inclined surface, and the arc inclined surface has a highest point and a lowest point.

5. The circulating air curtain structure of claim 1, wherein, The filter unit further comprises two locking members respectively connected to the two mounting frames, and locking holes are arranged in the shunt cavities, the locking member comprises a locking portion and a resilient portion, the locking portion is slidingly connected to the mounting frame, and the resilient portion is connected between the locking portion and the mounting frame, and the locking portion is capable of being inserted into the locking hole.

6. The circulating air curtain structure of claim 1, wherein, The shunt box is provided with a plurality of mounting openings matched with the plurality of shunt cavities, an access door is mounted in the mounting opening, the inner bottom wall of the mounting opening is inclined, and a sliding groove is arranged on the inner bottom wall of the mounting opening.

7. The circulating air curtain structure of claim 6, wherein, The filter unit further comprises a display member, the display member comprises a baffle and a ball, the baffle is movably arranged in the mounting opening, the baffle can divide the sliding groove into a high section and a low section, the ball is arranged in the high section, and the ball is in contact with the baffle.

8. A refrigerator characterized by The circulating air curtain structure in claim 1 is assembled.

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