Air-cooled frost-free double-door refrigerator

Abstract

The present invention discloses an air-cooled frost-free double-door refrigerator, comprising an evaporator compartment, a compressor compartment, a control device and a ventilation duct connecting the evaporator compartment and the compressor compartment, wherein a fan and a baffle for opening or closing the ventilation duct are arranged in the ventilation duct, the control device controls the fan to rotate along a first direction, an auxiliary device for assisting the evaporator surface to defrost is arranged in the evaporator compartment, a connecting mechanism is connected between the evaporator compartment and the bottom of the compressor compartment, and a balancing mechanism for driving the connecting mechanism switch is arranged between the connecting mechanism and the evaporator compartment, in the air-cooled frost-free double-door refrigerator, the fan drives a wind energy driving member to rotate, thereby driving a cleaning member to move up and down, the fan draws hot air into the evaporator compartment, and at the same time drives the cleaning plate to sweep the frost on the evaporator surface, accelerates the shedding of frost, thereby improving the defrosting effect on the evaporator surface, and ensures effective defrosting of the evaporator within the first direction operation time.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration equipment, in particular to an air-cooled frost-free double-door refrigerator. Background Art

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature. It is also a civilian product that keeps food or other items in a constant low temperature cold state. Currently, the commonly used refrigerators on the market can be divided into direct cooling refrigerators and air cooling refrigerators. Direct cooling refrigerators refer to frost refrigerators. The structure of direct cooling is relatively simple. The evaporator is directly displayed in the box. It is usually used for economical products with two doors. Most three-door refrigerators are also direct cooling. The advantage of direct cooling refrigerators is that they save electricity. Its evaporator is placed close to the inner wall of the refrigerator. When the refrigerator is running, the temperature of the evaporator surface will become very low. When the air in the refrigerator contacts the inner wall, the temperature in the refrigerator will drop. However, when the water vapor in the refrigerator contacts the inner wall of the refrigerator, it will form frost on the inner wall of the refrigerator when it is cold. Over time, a thick layer of "ice" will form on the inner wall of the refrigerator, but the temperature uniformity is low and the freezing speed is slow. The biggest difference between an air-cooled refrigerator and a direct-cooled refrigerator is that the evaporator will not be close to the wall of the cold box, and there will be a fan (small fan) near the evaporator. When the refrigerator is running, the fan rotates to accelerate the flow of air, and the "cold air" is blown into the refrigerator through the air outlet. Therefore, frost will not form on the inner wall of the air-cooled refrigerator, and the cold air can be blown to every corner of the refrigerator by the fan, making the temperature of the refrigerator more uniform and the temperature control more precise.

[0003] Although the air-cooled refrigerator is frost-free inside, the surface of its evaporator will still frost, so the refrigerator still needs to be defrosted regularly. During the defrosting process, a heater is used to heat the surface to melt the ice, so that the ice cubes fall and evaporate. However, there will still be ice water or ice cubes remaining in the air duct, and the phenomenon of re-freezing will occur. According to the existing application number of Qingdao Haier Refrigerator Co., Ltd.: CN201910222843.9, an air-cooled refrigerator is disclosed. In this patent application, although a ventilation duct is set between the compressor and the evaporator, A fan is arranged inside the ventilation duct. When defrosting, the ventilation duct is opened to directly pass the hotter air in the compressor into the evaporator to remove the frost on the surface of the evaporator. However, in the removal process, the frost adhering to the surface of the evaporator needs to be completely removed by the hot air in the ventilation duct, and the duration of the fan rotation at each turn is limited, so the frost is not completely removed; and the air pressure in the evaporator is in a phenomenon of continuous increase. When the air pressure increases to a certain level, it will damage the internal structure of the evaporator and greatly shorten the practical life of the evaporator. To this end, we propose an air-cooled frost-free double-door refrigerator. Summary of the invention

[0004] The object of the present invention is to provide an air-cooled frost-free double-door refrigerator to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an air-cooled frost-free double-door refrigerator, comprising an evaporator compartment, a compressor compartment, a control device and a ventilation duct connecting the evaporator compartment and the compressor compartment, wherein the evaporator is arranged in the evaporator compartment, the compressor is arranged in the compressor compartment, and the ventilation duct is provided with a fan and a baffle for opening or closing the ventilation duct, the baffle comprises two rotating plates in contact with each other, and the two rotating plates are rotatably connected to the ventilation duct through a fixed seat, the control device controls the fan to rotate along a first direction, the two rotating plates flip toward the evaporator side, and the air in the compressor compartment is sucked into the evaporator compartment, and the evaporator compartment is provided with an auxiliary device for assisting the evaporator surface to defrost;

[0006] A connecting mechanism is connected between the evaporator compartment and the bottom of the compressor chamber, and a balancing mechanism for driving the connecting mechanism switch is provided between the connecting mechanism and the evaporator compartment. The balancing mechanism enables the connecting mechanism to pass through the evaporator compartment and the compressor chamber to perform secondary removal of frost at the bottom of the evaporator.

[0007] Preferably, the auxiliary device includes a support plate arranged in the evaporator compartment and located on one side of the evaporator, two fixed cylinders are fixedly connected to the top of the support plate, and the two fixed cylinders are respectively located on both sides of the evaporator, a support seat is provided on the top of the fixed cylinder, the fixed cylinder is connected to a wind energy driving member through the support seat, and a cleaning member is provided between the two fixed cylinders, the cleaning member and the wind energy driving member are connected to each other through the fixed cylinder, and the fan drives the wind energy driving member through the wind energy to drive the cleaning member to perform frost removal operation relative to the surface of the evaporator.

[0008] Preferably, the wind energy driving member comprises a rotating rod rotatably connected between the two support seats, and both ends of the rotating rod penetrate the support seats, the rotating rod is located inside the support seat and is fixedly sleeved with a first bevel gear, and the rotating rod is connected to the cleaning member through the first bevel gear;

[0009] A sleeve is fixedly connected between the two support seats and is sleeved on the outer wall of the rotating rod, and the two support seats are fixedly connected with end sleeves on the sides away from each other, and the two end sleeves are fixedly connected with fixed bevel gears on the sides away from each other, and a fixed block is provided on one side of the rotating rod passing through the end sleeve, and the rotating rod is connected to a rotating bevel gear meshing with the fixed bevel gear through the fixed block, and the rotating bevel gear sleeve is coaxially connected to the fan blade.

[0010] Preferably, the cleaning member includes a threaded rod rotatably connected to the inside of a fixed cylinder, one end of the threaded rod extending out of a support seat is fixedly connected to a second bevel gear meshing with the first bevel gear, a threaded sleeve is sleeved on the outer wall of the threaded rod, and a cleaning plate is commonly connected between the two threaded sleeves, a sliding groove is provided at the position of the fixed cylinder corresponding to the cleaning plate, and the threaded rod drives the cleaning plate to slide up and down along the sliding groove.

[0011] Preferably, a connecting groove is provided at the position of the fan blade corresponding to the evaporator chamber, and the evaporator chamber is fixedly connected to the ventilation duct through the connecting groove, and the fan drives the fan blade to rotate relative to the support seat, thereby driving the cleaning plate to clean up and down.

[0012] Preferably, the connecting mechanism is arranged in a fixed groove at the bottom of the evaporator chamber, and the evaporator chamber is connected to a feed pipe through the fixed groove, the balancing mechanism is arranged in the feed pipe, and the bottom of the feed pipe is connected to a conveying pipe, the side of the conveying pipe away from the feed pipe is interconnected with the press chamber, and a crushing part for crushing fallen frost is provided in the conveying pipe.

[0013] Preferably, the balancing mechanism includes a positioning ring fixedly sleeved on the inner wall of the discharge tube, a telescopic spring is fixedly connected to the top of the positioning ring, and a conical sliding block is provided on the side of the telescopic spring away from the positioning ring, and a fitting block that fits with the conical sliding block is provided at the end of the discharge tube, and a sealing gasket is laid on the outer wall of the fitting block.

[0014] Preferably, the crushing member includes a driving motor arranged outside the conveying pipe, and the output end of the driving motor passes through one side of the conveying pipe and is fixedly connected to a crushing rod, and a crushing plate is sleeved on the outer wall of the crushing rod, and the driving motor drives the crushing plate to crush the frost.

[0015] Preferably, the driving motor is electrically connected to a switch, and the switch is arranged on the inner wall of the feeding tube, and the conical sliding block touches the switch when sliding downward, so that the driving motor operates.

[0016] Preferably, a torsion spring is connected between the rotating plate and the fixed seat, and the control device controls the fan to rotate along the first direction, and the two rotating plates flip toward the evaporator side. The control device controls the fan to rotate along the second direction, and the two rotating plates flip toward the compressor side.

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

[0018] The present invention drives the wind energy driving member to rotate by the fan, thereby driving the cleaning member to move up and down. The fan draws hot air into the evaporator room and drives the cleaning plate to sweep the frost on the evaporator surface at the same time, accelerating the shedding of frost, thereby improving the defrosting effect on the evaporator surface and ensuring effective defrosting of the evaporator within the first turning operation time.

[0019] In the present invention, the evaporator compartment and the bottom of the compressor chamber are connected by a connecting mechanism. When the internal pressure of the evaporator reaches a certain value, the melt water and frost at the bottom reach a certain level and enter the discharge pipe through the balancing mechanism, so that the drive motor is operated, thereby performing secondary crushing of the frost, and the melt water moves to the compressor chamber through the pipeline, and part of the heat energy of the compressor chamber is transferred to the pipeline to evaporate the melt water, and the evaporated gas is discharged from the compressor chamber, thereby effectively defrosting the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the evaporator compartment structure;

[0023] Figure 4 It is a cross-sectional view of the internal structure of the evaporator chamber;

[0024] Figure 5 is a schematic diagram of the auxiliary device structure;

[0025] Figure 6 This is the exploded view of the auxiliary device structure;

[0026] Figure 7 It is a structural schematic diagram of the connection between the evaporator compartment and the feed pipe;

[0027] Figure 8 It is a structural schematic diagram of the connection between the balancing mechanism and the crushing component.

[0028] In the figure: 1-evaporator compartment; 11-evaporator; 12-connecting groove; 2-press chamber; 21-compressor; 3-ventilation duct; 31-fan; 32-baffle; 321-rotating plate; 4-auxiliary device; 41-support plate; 42-fixing cylinder; 43-support seat; 5-connecting mechanism; 51-fixing groove; 52-feeding pipe; 53-transmission pipe; 6-balancing mechanism; 61-positioning ring; 62-telescopic spring; 63-conical Sliding block; 64-matching block; 7-wind energy driving member; 71-rotating rod; 72-first bevel gear; 73-sleeve; 74-end sleeve; 75-fixed bevel gear; 76-fixed block; 77-rotating bevel gear; 78-fan blade; 8-cleaning member; 81-threaded rod; 82-second bevel gear; 83-threaded sleeve; 84-cleaning plate; 85-sliding groove; 9-crushing member; 91-driving motor; 92-crushing rod; 93-crushing plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-8 The present invention provides a technical solution: an air-cooled frost-free double-door refrigerator, comprising an evaporator compartment 1, a compressor compartment 2, a control device (not shown), and a ventilation duct 3 connecting the evaporator compartment 1 and the compressor compartment 2, an evaporator 11 is provided in the evaporator compartment 1, a compressor 21 is provided in the compressor compartment 2, and a fan 31 and a baffle 32 for opening or closing the ventilation duct 3 are provided in the ventilation duct 3;

[0031] The baffle 32 is vertically arranged in the ventilation duct 3 during normal operation, separating the compressor compartment 2 from the evaporator compartment 1. When receiving a defrosting instruction, the control device controls the fan 31 to rotate along the first direction, and the wind energy opens the baffle 32. The first direction can suck the air in the compressor compartment 2 into the evaporator compartment 1. This is a prior art and will not be described in detail here.

[0032] The baffle 32 includes two rotating plates 321 that are in contact with each other, and the two rotating plates 321 are rotatably connected to the ventilation duct 3 through a fixed seat. The control device controls the fan 31 to rotate along the first direction, and the two rotating plates 321 flip toward the evaporator 11 side, and the air in the compressor compartment 2 is sucked into the evaporator compartment 1. The evaporator compartment 1 is provided with an auxiliary device 4 for assisting the defrosting of the surface of the evaporator 11;

[0033] A connecting mechanism 5 is connected between the evaporator compartment 1 and the bottom of the compressor compartment 2, and a balancing mechanism 6 for driving the switch of the connecting mechanism 5 is provided between the connecting mechanism 5 and the evaporator compartment 1. The balancing mechanism 6 enables the connecting mechanism 5 to pass through the evaporator compartment 1 and the compressor compartment 2, so as to perform secondary removal of frost at the bottom of the evaporator 11.

[0034] like Figure 4 As shown, the auxiliary device 4 includes a support plate 41 arranged in the evaporator chamber 1 and located on one side of the evaporator 11, two fixed cylinders 42 are fixedly connected to the top of the support plate 41, and the two fixed cylinders 42 are respectively located on both sides of the evaporator 11, and a support seat 43 is provided on the top of the fixed cylinder 42. The fixed cylinder 42 is connected to a wind energy driving member 7 through the support seat 43, and a cleaning member 8 is provided between the two fixed cylinders 42. The cleaning member 8 and the wind energy driving member 7 are connected to each other through the fixed cylinder 42, and the fan 31 drives the wind energy driving member 7 through the wind energy to drive the cleaning member 8 to perform frost removal operation relative to the surface of the evaporator 11.

[0035] like Figure 5-6As shown, the wind energy driving member 7 includes a rotating rod 71 rotatably connected between two support seats 43, and both ends of the rotating rod 71 penetrate the support seats 43, the rotating rod 71 is located inside the support seats 43 and is fixedly sleeved with a first bevel gear 72, and the rotating rod 71 is connected to the cleaning member 8 through the first bevel gear 72;

[0036] A sleeve 73 sleeved on the outer wall of the rotating rod 71 is fixedly connected between the two support seats 43, and the two support seats 43 are fixedly connected to the side away from each other with an end sleeve 74, and the two end sleeves 74 are fixedly connected to the side away from each other with a fixed bevel gear 75, and a fixed block 76 is provided on one side of the rotating rod 71 passing through the end sleeve 74, and the rotating rod 71 is connected to a rotating bevel gear 77 meshing with the fixed bevel gear 75 through the fixed block 76, and the rotating bevel gear 77 is coaxially connected with a fan blade 78;

[0037] When the fan 31 makes the first turning movement, air enters the evaporator compartment 1 from the compressor compartment 2. Since the fixed bevel gear 75 and the rotating bevel gear 77 are meshed with each other, the fan blades 78 rotate around the end tube 74 and the rotating rod 71 rotates. This is driven by the wind energy of the fan 31 without consuming additional electricity.

[0038] The cleaning member 8 includes a threaded rod 81 rotatably connected to the interior of the fixed cylinder 42. One end of the threaded rod 81 extending out of the support seat 43 is fixedly connected to a second bevel gear 82 meshing with the first bevel gear 72. A threaded sleeve 83 is sleeved on the outer wall of the threaded rod 81, and a cleaning plate 84 is commonly connected between the two threaded sleeves 83. A sliding groove 85 is opened at the position of the fixed cylinder 42 corresponding to the cleaning plate 84. The threaded rod 81 drives the cleaning plate 84 to slide up and down along the sliding groove 85.

[0039] Due to the meshing action of the first bevel gear 72 and the second bevel gear 82, the rotating rod 71 drives the threaded rod 81 to rotate. Due to the limiting effect of the sliding groove 85, the threaded rod 81 drives the cleaning plate 84 to slide up and down along the sliding groove 85. The cleaning plate 84 contacts the surface of the evaporator 11, so that the frost on the surface of the evaporator 11 is quickly removed, avoiding the melting of external frost and delaying the melting of internal frost, thereby improving the defrosting efficiency.

[0040] like Figure 3 As shown, a connection groove 12 is provided at the position of the corresponding fan blade 78 of the evaporator chamber 1, and the evaporator chamber 1 is fixedly connected to the ventilation duct 3 through the connection groove 12. The fan 31 drives the fan blade 78 to rotate relative to the support seat 43, thereby driving the cleaning plate 84 to clean up and down. The ventilation duct 3 and the positions of the fan blade 78 are interconnected, so that the fan 31 can drive the fan blade 78 to rotate to a greater extent, thereby assisting the defrosting operation.

[0041] like Figure 7As shown, the connecting mechanism 5 is arranged in a fixed groove 51 at the bottom of the evaporator compartment 1, and the evaporator compartment 1 is connected to a feed pipe 52 through the fixed groove 51, the balancing mechanism 6 is arranged in the feed pipe 52, and the bottom of the feed pipe 52 is connected to a conveying pipe 53, the side of the conveying pipe 53 away from the feed pipe 52 is mutually connected with the press chamber 2, and a crushing member 9 for crushing the falling frost is arranged in the conveying pipe 53;

[0042] The conveying pipe 53 and the discharge pipe 52 are interconnected, and the discharge pipe 52 is located on one side of the top of the conveying pipe 53, so that after the frost enters the conveying pipe 53 from the discharge pipe 52, it is crushed twice by the crushing member 9 to improve its melting efficiency.

[0043] The balancing mechanism 6 includes a positioning ring 61 fixedly sleeved on the inner wall of the feeding tube 52, a telescopic spring 62 is fixedly connected to the top of the positioning ring 61, and a conical sliding block 63 is provided on the side of the telescopic spring 62 away from the positioning ring 61, and a fitting block 64 that fits with the conical sliding block 63 is provided at the end of the feeding tube 52, and a sealing gasket is laid on the outer wall of the fitting block 64;

[0044] Since the duration of the first turn of the fan 31 is limited, the melted water at the bottom will freeze again. The telescopic spring 62 itself has a certain rigidity. When the compressor chamber 2 continuously delivers air to the evaporator chamber 1 through the ventilation duct 3, the pressure in the evaporator chamber 1 will increase. At the same time, the melted water and frost at the bottom of the evaporator chamber 1 will increase, squeezing the conical sliding block 63 to shrink the telescopic spring 62. The conical sliding block 63 moves away from the fitting block 64. The frost and melted water enter the conveying pipe 53 through the discharge pipe 52. Part of the heat energy of the compressor chamber 2 enters the conveying pipe 53 to evaporate the internal melted water, i.e., frost. The evaporated gas can be discharged from the compressor chamber 2.

[0045] like Figure 8 As shown, the crushing member 9 includes a driving motor 91 arranged on the outside of the conveying pipe, and the output end of the driving motor 91 passes through one side of the conveying pipe and is fixedly connected to a crushing rod 92, and the outer wall of the crushing rod 92 is provided with a crushing plate 93, and the driving motor 91 drives the crushing plate 93 to crush the frost.

[0046] The drive motor 91 is electrically connected to a switch (not shown), and the switch is arranged on the inner wall of the discharge pipe 52. When the conical sliding block 63 slides downward, it touches the switch, so that the drive motor 91 operates. The switch is controlled by the conical sliding block 63. When the pressure in the evaporator chamber 1 reaches a certain value, the telescopic spring 62 contracts, and melt water and frost enter the discharge pipe 52. The conical sliding block 63 moves downward to touch the switch, so that the drive motor 91 runs. The drive motor 91 drives the breaking rod 92 to rotate, thereby breaking the frost for the second time.

[0047] like Figure 2As shown, a torsion spring is connected between the rotating plate 321 and the fixed seat, and the control device controls the fan 31 to rotate along the first direction, and the two rotating plates 321 flip toward the evaporator 11 side. The control device controls the fan 31 to rotate along the second direction, and the two rotating plates 321 flip toward the compressor 21 side. The rotating plate 321 can flip in both directions relative to the ventilation duct 3. During normal operation, it blocks the compressor compartment 2 and the evaporator compartment 1, hindering the transmission of air. During defrosting operation, the wind energy of the fan 31 drives it to open, thereby transmitting air.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air-cooled frost-free double-door refrigerator, comprising an evaporator compartment (1), a compressor compartment (2), a control device, and a ventilation duct (3) connecting the evaporator compartment (1) and the compressor compartment (2), wherein an evaporator (11) is provided in the evaporator compartment (1), a compressor (21) is provided in the compressor compartment (2), and a fan (31) and a baffle (32) for opening or closing the ventilation duct (3) are provided in the ventilation duct (3), characterized in that: The baffle (32) comprises two rotating plates (321) in contact with each other, and the two rotating plates (321) are rotatably connected to the ventilation duct (3) via a fixing seat, the control device controls the fan (31) to rotate along a first direction, the two rotating plates (321) flip toward the evaporator (11), and the air in the compressor compartment (2) is sucked into the evaporator compartment (1), and the evaporator compartment (1) is provided with an auxiliary device (4) for assisting the surface defrosting of the evaporator (11); A connecting mechanism (5) is connected between the evaporator compartment (1) and the bottom of the compressor compartment (2), and a balancing mechanism (6) for driving the connecting mechanism (5) to switch is provided between the connecting mechanism (5) and the evaporator compartment (1), wherein the balancing mechanism (6) enables the connecting mechanism (5) to penetrate the evaporator compartment (1) and the compressor compartment (2), thereby performing secondary removal of frost at the bottom of the evaporator (11); The auxiliary device (4) comprises a support plate (41) arranged in the evaporator chamber (1) and located on one side of the evaporator (11); two fixed cylinders (42) are fixedly connected to the top of the support plate (41), and the two fixed cylinders (42) are respectively located on both sides of the evaporator (11); a support seat (43) is provided on the top of the fixed cylinder (42); the fixed cylinder (42) is connected to a wind energy driving member (7) via the support seat (43); a cleaning member (8) is provided between the two fixed cylinders (42); the cleaning member (8) and the wind energy driving member (7) are connected to each other via the fixed cylinder (42); and the fan (31) drives the wind energy driving member (7) via wind energy to drive the cleaning member (8) to perform a frost removal operation relative to the surface of the evaporator (11); The wind energy driving member (7) comprises a rotating rod (71) rotatably connected between the two support seats (43), and both ends of the rotating rod (71) penetrate the support seats (43), the rotating rod (71) is located inside the support seats (43) and is fixedly sleeved with a first bevel gear (72), and the rotating rod (71) is connected to the cleaning member (8) via the first bevel gear (72); A sleeve (73) sleeved on the outer wall of the rotating rod (71) is fixedly connected between the two support seats (43), and an end sleeve (74) is fixedly connected to the sides of the two support seats (43) away from each other, and a fixed bevel gear (75) is fixedly connected to the sides of the two end sleeves (74) away from each other, and a fixed block (76) is provided on the side of the rotating rod (71) passing through the end sleeve (74), and the rotating rod (71) is connected to a rotating bevel gear (77) meshing with the fixed bevel gear (75) through the fixed block (76), and the rotating bevel gear (77) is coaxially connected to a fan blade (78).

2. The air-cooled frost-free double-door refrigerator according to claim 1, characterized in that: The cleaning member (8) comprises a threaded rod (81) rotatably connected to the interior of the fixed cylinder (42); one end of the threaded rod (81) extending out of the support seat (43) is fixedly connected to a second bevel gear (82) meshing with the first bevel gear (72); a threaded sleeve (83) is sleeved on the outer wall of the threaded rod (81); a cleaning plate (84) is commonly connected between the two threaded sleeves (83); a sliding groove (85) is formed in the fixed cylinder (42) at a position corresponding to the cleaning plate (84); and the threaded rod (81) drives the cleaning plate (84) to slide up and down along the sliding groove (85).

3. The air-cooled frost-free double-door refrigerator according to claim 2, characterized in that: A connection groove (12) is provided at a position corresponding to the fan blade (78) of the evaporator chamber (1), and the evaporator chamber (1) is fixedly connected to the ventilation duct (3) via the connection groove (12). The fan (31) drives the fan blade (78) to rotate relative to the support seat (43), thereby driving the cleaning plate (84) to clean up and down.

4. The air-cooled frost-free double-door refrigerator according to claim 1, characterized in that: The connecting mechanism (5) is arranged in a fixed groove (51) at the bottom of the evaporator chamber (1), and the evaporator chamber (1) is connected to a feed pipe (52) via the fixed groove (51). The balancing mechanism (6) is arranged in the feed pipe (52), and the bottom of the feed pipe (52) is connected to a conveying pipe (53). The side of the conveying pipe (53) away from the feed pipe (52) is interconnected with the press chamber (2), and a crushing member (9) for crushing fallen frost is arranged in the conveying pipe (53).

5. The air-cooled frost-free double-door refrigerator according to claim 4, characterized in that: The balancing mechanism (6) comprises a positioning ring (61) fixedly sleeved on the inner wall of the discharge tube (52), a telescopic spring (62) fixedly connected to the top of the positioning ring (61), a conical sliding block (63) being provided on the side of the telescopic spring (62) away from the positioning ring (61), and a fitting block (64) fitting with the conical sliding block (63) being provided at the end of the discharge tube (52), and a sealing gasket being laid on the outer wall of the fitting block (64).

6. The air-cooled frost-free double-door refrigerator according to claim 5, characterized in that: The crushing member (9) comprises a driving motor (91) arranged outside the conveying pipe (53), and the output end of the driving motor (91) passes through one side of the conveying pipe (53) and is fixedly connected to a crushing rod (92), and the outer wall of the crushing rod (92) is provided with a crushing plate (93), and the driving motor (91) drives the crushing plate (93) to crush the frost.

7. The air-cooled frost-free double-door refrigerator according to claim 6, characterized in that: The driving motor (91) is electrically connected to a switch, and the switch is arranged on the inner wall of the feeding tube (52). When the conical sliding block (63) slides downward, it touches the switch, causing the driving motor (91) to operate.

8. The air-cooled frost-free double-door refrigerator according to claim 1, characterized in that: A torsion spring is connected between the rotating plate (321) and the fixing seat, and the control device controls the fan (31) to rotate along a first direction, and the two rotating plates (321) flip toward the evaporator (11) side; the control device controls the fan (31) to rotate along a second direction, and the two rotating plates (321) flip toward the compressor (21) side.

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