Refrigerating unit

Abstract

The invention discloses a refrigerating unit, and belongs to the technical field of refrigerating equipment, the refrigerating unit comprises a machine shell, an evaporator is mounted in the machine shell, a plurality of air inlets are formed in the side face of the machine shell, fans are arranged in the air inlets, a moving plate is slidably mounted in the machine shell in the vertical direction, and a driving assembly used for driving the moving plate to move in the vertical direction is arranged in the machine shell; a water pipe is fixed to the side face of the movable plate, a plurality of nozzles arranged at equal intervals are arranged on the side, close to the fan, of the water pipe, a water collecting groove is formed in the bottom of the machine shell and located under the evaporator, a first through hole communicated with the water collecting groove is formed in the outer side face of the machine shell, a water pump is installed in the machine shell, and a water inlet of the water pump is communicated with the water collecting groove. A water outlet of the water pump is connected with a hose which is communicated with the water pipe. Water is sprayed to the fan through the spray head, then dust on the fan blades is cleaned, and the cleaning efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigeration unit. Background Art

[0002] With the continuous development of industrialization and technology, refrigeration technology is increasingly used in many fields, including air conditioning, cold storage, food processing, pharmaceutical refrigeration and other industries. As the core equipment of the refrigeration system, the performance and efficiency of the refrigeration unit directly affect the refrigeration effect and energy consumption. Most of the existing refrigeration units adopt the compression refrigeration principle and work through components such as compressors, evaporators, condensers and expansion valves.

[0003] Refrigeration units generally work in an open environment, and the air may contain various dust, dirt, and fine particles. During the operation of the refrigeration unit, the fan will continue to inhale air, and these particles will flow into the air inlet with the air flow and adhere to the fan. When the fan is seriously dusty, it may lead to insufficient air flow, which will make the heat dissipation effect of the evaporator worse. The inefficient heat exchange process can easily cause frost on the evaporator, which in turn affects the cooling capacity of the system. In the prior art, it is usually necessary to manually clean the fan blades and air inlets regularly to reduce dust accumulation in order to maintain the normal operation of the fan, but the efficiency of manual cleaning is low. Summary of the invention

[0004] In order to improve the problem of low efficiency of manual cleaning fans, the present application provides a refrigeration unit.

[0005] The present application provides a refrigeration unit adopting the following technical solution: A refrigeration unit comprises a casing, an evaporator is installed in the casing, a plurality of air inlets are arranged on the side of the casing, a fan is arranged in the air inlet, a movable plate is installed in the casing along the vertical sliding direction, a driving assembly for driving the movable plate to move vertically is arranged in the casing, a water pipe is fixed to the side of the movable plate, a plurality of nozzles arranged at equal intervals are arranged on the side of the water pipe close to the fan, a water collecting trough is arranged at the bottom of the casing, the water collecting trough is located directly below the evaporator, a through hole connected to the water collecting trough is opened on the outer side surface of the casing, a water pump is installed in the casing, the water inlet of the water pump is connected to the water collecting trough, the water outlet of the water pump is connected to a hose, and the hose is connected to the water pipe.

[0006] By adopting the above technical solution, during the refrigeration process, water vapor in the air will condense on the low-temperature surface of the evaporator, and the condensed water droplets will drop into the water collection tank. The water pump will transport the water in the water collection tank to the water pipe through a hose, and then spray water on the fan through a nozzle, thereby cleaning the dust on the fan blades with high cleaning efficiency.

[0007] Preferably, the driving assembly includes a mounting frame, the movable plate is mounted on the mounting frame, the mounting frame includes two horizontally arranged mounting plates, a connecting plate is fixed between the two mounting plates, a vertically arranged screw and guide rod are installed in the casing, the screw is rotatably connected to the casing, one of the mounting plates is sleeved on the outer periphery of the screw, the screw and the mounting plate are threadedly matched, the other mounting plate is sleeved on the outer periphery of the guide rod, a motor is installed in the casing, and the output end of the motor is fixedly connected to the end of the screw.

[0008] By adopting the above technical solution, the motor is started, the motor drives the screw to rotate, the screw drives the mounting frame to slide vertically, and the mounting frame drives the moving plate to slide vertically, so that the nozzle can spray water to clean the fan.

[0009] Preferably, a plurality of baffles are provided in the air inlet, and the spacing between two adjacent baffles is equal to half of the width of the baffles. Rotating shafts are respectively fixed on both sides of the baffles, and the rotating shafts are rotatably connected to the casing. Two pull ropes are fixed to the side of the baffle away from the fan, and the pull ropes can drive the baffle to rotate upward away from the fan. A horizontally arranged abutment rod 1 is fixed to the inner wall of the air inlet, and the abutment rod 1 can abut against the bottom surface of the baffle at the bottom. A drainage groove connected to the outside is provided on the inner bottom surface of the air inlet. A slope 3 is provided on the inner bottom surface of the air inlet, and the slope 3 is inclined downward close to the side of the drainage groove.

[0010] By adopting the above technical solution, when the refrigeration unit is working, the baffles are in a horizontal state to facilitate the outside air to enter the casing through the air inlet; when the nozzle cleans the fan, the pull rope can drive the baffle to rotate upward, so that the side edges of two adjacent baffles are fitted together, and the top surface of the baffle faces the direction close to the fan, so that the nozzle can clean the baffle while cleaning the fan, and the cleaned sewage flows to the drain groove through the inclined surface and is discharged to the outside of the casing.

[0011] Preferably, a positioning groove is provided on the bottom surface of the air inlet, and a positioning block is installed on the casing through the positioning groove so as to slide vertically. A guide rod 1 is fixed to the inner wall of the air inlet, and the guide rod 1 is located directly above the positioning block. The pull rope sequentially passes around the abutment rod 1 and the guide rod 1, and the bottom end of the pull rope is fixedly connected to the top surface of the positioning block. A sliding block is fixed to the side surface of the positioning block, and a sliding groove is provided on the inner wall of the positioning groove. The sliding block slides vertically with the casing through the sliding groove, and a spring 1 is fixed to the bottom surface of the positioning block, and the bottom end of the spring 1 is fixedly connected to the inner bottom surface of the positioning groove.

[0012] By adopting the above technical solution, when the refrigeration unit is working, under the elastic force of spring 1, the positioning block drives the pull rope to be in a taut state, the baffle at the bottom abuts against the abutment rod 1, and the baffle remains in a horizontal state.

[0013] Preferably, a limiting groove is provided on the inner top surface of the air inlet, and the casing is installed with a limiting block by vertical sliding along the limiting groove; a second guide rod is fixed to the inner wall of the air inlet, and the second guide rod is located directly below the limiting block; the top end of the pull rope passes around the second guide rod and is fixedly connected to the bottom surface of the limiting block; a reset block is fixed to the side of the limiting block; a reset groove is provided on the inner wall of the limiting groove, and the reset block is vertically slidably matched with the casing through the reset groove; a magnetic block is fixed on the top surface of the limiting block, and an electromagnet is fixed on the inner top surface of the limiting groove, and the electromagnet can attract the magnetic block when energized.

[0014] By adopting the above technical solution, when the refrigeration unit is working, the electromagnet is powered off, and when the nozzle sprays water to clean the fan, the electromagnet is powered on, the electromagnet attracts the magnetic block, the limit block drives the pull rope to move upward, and the pull rope drives the baffle to rotate upward, so that the top surface of the baffle rotates to a direction close to the fan, so that the nozzle can clean the dust accumulated on the top surface of the baffle.

[0015] Preferably, a moving rod is fixedly provided in the moving plate, and moving blocks are respectively installed at both ends of the moving rod, and the moving blocks are rotatably connected to the moving rod. Connecting grooves are respectively provided on the opposite inner sides of the two mounting plates, and the moving blocks are slidingly matched with the mounting plates along the length direction of the mounting plates through the connecting grooves. A cylinder is installed on the mounting frame, and the piston rod end of the cylinder is fixedly connected to the side of the moving block away from the fan. A rotating component for driving the moving plate to rotate downward is provided on the mounting frame, and a temperature detection sensor is provided at the bottom of the evaporator.

[0016] By adopting the above technical solution, the temperature detection sensor can detect the temperature of the outer surface of the evaporator. When the evaporator is frosted, the temperature is lower than 0°C, the cylinder is started, and the cylinder drives the movable plate to move toward the evaporator. The rotating assembly pushes the movable plate downward, so that the nozzle is set toward the top of the evaporator. The nozzle sprays water on the evaporator, thereby accelerating the efficiency of melting the frost layer on the evaporator.

[0017] Preferably, a torsion spring is provided on the outer periphery of the movable rod, one end of the torsion spring is fixedly connected to the side of the movable plate, the other end of the torsion spring is fixedly connected to the side of the movable block, a limiting plate 1 is fixed to the side of the movable block close to the movable plate, a limiting plate 2 is fixed to the side of the movable plate close to the movable block, and the side of the limiting plate 1 away from the fan can abut against the limiting plate 2.

[0018] By adopting the above technical solution, when the nozzle cleans the fan, the movable plate rotates under the elastic force of the torsion spring, so that the limiting plate 1 abuts against the limiting plate 2, thereby keeping the movable plate in a vertical state.

[0019] Preferably, the rotating assembly includes an abutment block fixed on the mounting plate, the abutment block can abut against the side of the movable plate away from the fan, the abutment block is located above the movable rod, and the bottom surface of the abutment block is provided with a slope 1, and the slope 1 is located on the side of the abutment block close to the fan.

[0020] By adopting the above technical solution, when the movable plate moves in a direction away from the fan, the movable plate contacts the inclined surface, and the top of the movable plate contacts the abutment block and rotates downward, so that the nozzle is arranged downward.

[0021] Preferably, a pressing groove is provided on the bottom surface of the abutment block, and the abutment block is vertically slidably installed through the pressing groove. A second spring is fixed on the top surface of the pressing block, and the top end of the second spring is fixedly connected to the inner top surface of the pressing groove.

[0022] By adopting the above technical solution, when the movable plate rotates downward and is located below the abutment block, the abutment block moves downward under the elastic force of spring 2, thereby pushing the movable plate to continue to rotate downward, so that the nozzle is set toward the side close to the top of the evaporator, so that the nozzle can spray water on the evaporator.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the refrigeration process, water vapor in the air will condense on the low-temperature surface of the evaporator, and the condensed water droplets will drop into the water collection tank. The water pump will transport the water in the water collection tank to the water pipe through the hose, and then spray water on the fan through the nozzle, thereby cleaning the dust on the fan blades with high cleaning efficiency; 2. When the refrigeration unit is working, the baffles are in a horizontal state, so that the outside air can enter the casing through the air inlet; when the nozzle cleans the fan, the pull rope can drive the baffles to rotate upward, so that the sides of two adjacent baffles fit together, and the top surface of the baffle faces the direction close to the fan, so that the nozzle can clean the baffles while cleaning the fan, and the cleaned sewage flows to the drainage trough through the inclined plane and is discharged to the outside of the casing; 3. When the refrigeration unit is working, the electromagnet is powered off. When the nozzle sprays water to clean the fan, the electromagnet is powered on, the electromagnet attracts the magnetic block, the limit block drives the pull rope to move upward, and the pull rope drives the baffle to rotate upward, so that the top surface of the baffle rotates to a direction close to the fan, so that the nozzle can clean the dust accumulated on the top surface of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the refrigeration unit of an embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the internal structure of the casing of the refrigeration unit of an embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the mounting frame in the refrigeration unit of the embodiment of the present application.

[0027] Figure 4 It is a cross-sectional view of an abutment block in a refrigeration unit according to an embodiment of the present application.

[0028] Figure 5 It is a cross-sectional view of a casing in a refrigeration unit according to an embodiment of the present application.

[0029] Figure 6 yes Figure 5 A magnified schematic diagram of center A.

[0030] Figure 7 yes Figure 5 A magnified schematic diagram of point B in the middle.

[0031] Figure numerals: 1, housing; 11, evaporator; 111, temperature detection sensor; 12, water collection tank; 121, through hole one; 13, air inlet; 131, inclined plane three; 14, fan; 15, water pump; 16, drainage tank; 2, moving plate; 21, water pipe; 22, nozzle; 23, hose; 24, moving rod; 25, moving block; 251, limit plate one; 26, torsion spring; 27, limit plate two; 3, mounting frame; 31, mounting plate; 32, connecting plate; 33, connecting groove; 34, Cylinder; 35, screw; 36, guide rod; 37, motor; 4, baffle; 41, rotating shaft; 42, pull rope; 43, abutment rod 1; 5, positioning block; 51, positioning slot; 52, guide rod 1; 53, slider; 54, slide slot; 55, spring 1; 6, limit block; 61, limit slot; 62, guide rod 2; 63, reset block; 64, reset slot; 65, magnetic block; 66, electromagnet; 7, abutment block; 71, inclined plane 1; 72, pressure block; 73, pressure slot; 74, spring 2. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings.

[0033] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0034] The present application embodiment discloses a refrigeration unit. Figure 1 and Figure 2 The refrigeration unit includes a casing 1, in which an evaporator 11 is installed. A water collecting tank 12 is provided at the bottom of the casing 1, and the water collecting tank 12 is located directly below the evaporator 11. A through hole 121 connected to the water collecting tank 12 is opened on the outer side of the casing 1. A plurality of air inlets 13 are provided on the side of the casing 1, and a fan 14 is provided in the air inlet 13.

[0035] Reference Figure 2 and Figure 3 A movable plate 2 is vertically slidably installed in the housing 1, a water pipe 21 is fixed on the side of the movable plate 2, and a plurality of nozzles 22 arranged at equal intervals are arranged on the side of the water pipe 21 close to the fan 14. A water pump 15 is installed in the housing 1, and the water inlet of the water pump 15 is connected to the bottom of the water collecting tank 12. A hose 23 is connected to the water outlet of the water pump 15, and the hose 23 is connected to the water pipe 21. A mounting frame 3 is arranged in the housing 1, and the mounting frame 3 includes two horizontally arranged mounting plates 31, and a connecting plate 32 is fixed between the two mounting plates 31.

[0036] Reference Figure 2 and Figure 4 A moving rod 24 is fixedly disposed in the moving plate 2, and moving blocks 25 are respectively installed at both ends of the moving rod 24, and the moving blocks 25 are rotatably connected to the moving rod 24. Connecting grooves 33 are respectively opened on the opposite inner sides of the two mounting plates 31, and the moving blocks 25 slide and cooperate with the mounting plates 31 along the length direction of the mounting plates 31 through the connecting grooves 33. A cylinder 34 is installed on the mounting frame 3, and the end of the piston rod of the cylinder 34 is fixedly connected to the side of the moving block 25 away from the fan 14.

[0037] Reference Figure 2 and Figure 3A vertically arranged screw rod 35 and a guide rod 36 are installed in the housing 1, and the screw rod 35 is rotatably connected to the housing 1. One of the mounting plates 31 is sleeved on the outer periphery of the screw rod 35, and the screw rod 35 and the mounting plate 31 are threadedly matched, and the other mounting plate 31 is sleeved on the outer periphery of the guide rod 36. A motor 37 is installed in the housing 1, and the output end of the motor 37 is fixedly connected to the end of the screw rod 35. When the motor 37 is started, the motor 37 drives the screw rod 35 to rotate, and the screw rod 35 drives the mounting frame 3 to slide vertically, and the mounting frame 3 drives the moving plate 2 to slide vertically, so that the nozzle 22 can spray water to clean the fan 14.

[0038] Reference Figure 5 and Figure 6 , a plurality of baffles 4 are arranged in the air inlet 13, and the spacing between two adjacent baffles 4 is equal to half the width of the baffle 4. Rotating shafts 41 are fixed on both sides of the baffle 4, and the rotating shafts 41 are rotatably connected to the casing 1. Two pull ropes 42 are fixed on the side of the baffle 4 away from the fan 14, and the pull ropes 42 can drive the side of the baffle 4 away from the fan 14 to rotate upward. A horizontally arranged abutment rod 1 43 is fixed to the inner wall of the air inlet 13, and the abutment rod 1 43 can abut against the bottom surface of the baffle 4 located at the bottom. A drainage groove 16 connected to the outside is provided on the inner bottom surface of the casing 1, and a slope 3 131 is provided on the inner bottom surface of the air inlet 13, and the slope 3 131 is arranged to be inclined downward near the side of the drainage groove 16.

[0039] Reference Figure 5 and Figure 6 A positioning groove 51 is provided on the bottom surface of the air inlet 13, and a positioning block 5 is installed on the housing 1 through the positioning groove 51 to slide vertically. A guide rod 52 is fixed to the inner wall of the air inlet 13, and the guide rod 52 is located directly above the positioning block 5. The pull rope 42 passes around the abutment rod 43 and the guide rod 52 in sequence, and the bottom end of the pull rope 42 is fixedly connected to the top surface of the positioning block 5. A slider 53 is fixed to the side of the positioning block 5, and a slide groove 54 is provided on the inner wall of the positioning groove 51. The slider 53 slides vertically with the housing 1 through the slide groove 54. A spring 55 is fixed to the bottom surface of the positioning block 5, and the bottom end of the spring 55 is fixedly connected to the inner bottom surface of the positioning groove 51.

[0040] Reference Figure 6 and Figure 7, a limiting groove 61 is provided on the inner top surface of the air inlet 13, and the housing 1 is installed with a limiting block 6 by sliding vertically through the limiting groove 61. A guide rod 2 62 is fixed to the inner wall of the air inlet 13, and the guide rod 2 62 is located directly below the limiting block 6. The top of the pull rope 42 passes around the guide rod 2 62 and is fixedly connected to the bottom surface of the limiting block 6. A reset block 63 is fixed to the side of the limiting block 6, and a reset groove 64 is provided on the inner wall of the limiting groove 61. The reset block 63 is slidably matched with the housing 1 in the vertical direction through the reset groove 64. A magnetic block 65 is fixed to the top surface of the limiting block 6, and an electromagnet 66 is fixed to the inner top surface of the limiting groove 61. The electromagnet 66 can attract the magnetic block 65 after being energized.

[0041] When the refrigeration unit is working, the electromagnet 66 is powered off, and the elastic force of the spring 55 of the positioning block 5 drives the pull rope 42 to be in a taut state, and the baffle 4 at the bottom abuts against the abutment rod 43, and the baffles 4 are all in a horizontal state, so that the outside air can enter the casing 1 through the air inlet 13; when the nozzle 22 cleans the fan 14, the electromagnet 66 is powered on, and the electromagnet 66 attracts the magnetic block 65, and the limit block 6 drives the pull rope 42 to move upward, and the pull rope 42 drives the baffle 4 to rotate upward, so that the side edges of the two adjacent baffles 4 are in contact with each other, and the top surface of the baffle 4 is facing the direction close to the fan 14, so that the nozzle 22 can clean the baffle 4 while cleaning the fan 14, and the cleaned sewage flows to the drainage trough 16 through the inclined surface three 131 and is discharged to the outside of the casing 1.

[0042] Reference Figure 3 and Figure 4 The outer periphery of the moving rod 24 is sleeved with a torsion spring 26, one end of the torsion spring 26 is fixedly connected to the side of the moving plate 2, and the other end of the torsion spring 26 is fixedly connected to the side of the moving block 25. A limiting plate 1 251 is fixed to the side of the moving block 2 close to the moving plate 2, and a limiting plate 27 is fixed to the side of the moving plate 2 close to the moving block 25. The side of the limiting plate 1 251 away from the fan 14 can abut against the limiting plate 27. An abutment block 7 is fixed to the side of the mounting plate 31 close to the moving plate 2, and the abutment block 7 can abut against the side of the moving plate 2 away from the fan 14. The abutment block 7 is located above the moving rod 24, and the bottom surface of the abutment block 7 is provided with an inclined surface 1 71, and the inclined surface 1 71 is located on the side of the abutment block 7 close to the fan 14.

[0043] Reference Figure 2 and Figure 4 The bottom surface of the abutment block 7 is provided with a pressing groove 73, and the abutment block 7 is vertically slidably mounted with a pressing block 72 through the pressing groove 73. A spring 2 74 is fixed to the top surface of the pressing block 72, and the top end of the spring 2 74 is fixedly connected to the inner top surface of the pressing groove 73. A temperature detection sensor 111 is provided at the bottom of the evaporator 11, and the temperature detection sensor 111 can detect the temperature of the outer surface of the evaporator 11.

[0044] When the evaporator 11 is frosted, the temperature measured by the temperature detection sensor 111 is lower than 0°C, and the cylinder 34 is started. The cylinder 34 drives the movable plate 2 to move toward the direction close to the evaporator 11, and the movable plate 2 contacts the inclined surface 71, and the top of the movable plate 2 contacts the abutment block 7 and rotates downward, so that the nozzle 22 is set downward; when the movable plate 2 continues to move and is located below the abutment block 7, the abutment block 72 moves downward under the elastic force of the spring 2 74, and then pushes the movable plate 2 to continue to rotate downward, so that the nozzle 22 is set toward the side close to the top of the evaporator 11, so that the nozzle 22 can spray water on the evaporator 11, thereby accelerating the efficiency of melting the frost layer on the evaporator 11.

[0045] The implementation principle of a refrigeration unit in an embodiment of the present application is as follows: during the refrigeration process, water vapor in the air condenses on the low-temperature surface of the evaporator 11, and the condensed water droplets drip into the water collection tank 12. The water pump 15 transports the water in the water collection tank 12 to the water pipe 21 through the hose 23, and then sprays water on the fan 14 through the nozzle 22, thereby cleaning the dust on the blades of the fan 14 with high cleaning efficiency.

[0046] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A refrigeration unit, comprising a casing (1), an evaporator (11) being installed in the casing (1), a plurality of air inlets (13) being arranged on the side of the casing (1), a fan (14) being arranged in the air inlet (13), characterized in that: A movable plate (2) is installed in the casing (1) for vertical sliding movement, and a driving assembly for driving the movable plate (2) to move vertically is arranged in the casing (1). A water pipe (21) is fixed on the side of the movable plate (2), and a plurality of nozzles (22) are arranged at equal intervals on the side of the water pipe (21) close to the fan (14). A water collecting trough (12) is arranged at the bottom of the casing (1), and the water collecting trough (12) is located directly below the evaporator (11). A through hole (121) connected to the water collecting trough (12) is opened on the outer side surface of the casing (1). A water pump (15) is installed in the casing (1), and the water inlet of the water pump (15) is connected to the water collecting trough (12). The water outlet of the water pump (15) is connected to a hose (23), and the hose (23) is connected to the water pipe (21).

2. A refrigeration unit according to claim 1, characterized in that: The driving assembly comprises a mounting frame (3), the movable plate (2) is mounted on the mounting frame (3), the mounting frame (3) comprises two horizontally arranged mounting plates (31), a connecting plate (32) is fixed between the two mounting plates (31), a vertically arranged screw rod (35) and a guide rod (36) are installed in the housing (1), the screw rod (35) is rotatably connected to the housing (1), one of the mounting plates (31) is sleeved on the outer periphery of the screw rod (35), the screw rod (35) and the mounting plate (31) are threadedly matched, and the other mounting plate (31) is sleeved on the outer periphery of the guide rod (36), a motor (37) is installed in the housing (1), and an output end of the motor (37) is fixedly connected to an end of the screw rod (35).

3. A refrigeration unit according to claim 2, characterized in that: A plurality of baffles (4) are arranged in the air inlet (13), the spacing between two adjacent baffles (4) is equal to half the width of the baffle (4), rotating shafts (41) are respectively fixed on both sides of the baffle (4), the rotating shafts (41) are rotatably connected to the casing (1), two pull ropes (42) are fixed on the side of the baffle (4) away from the fan (14), the pull ropes (42) can drive the side of the baffle (4) away from the fan (14) to rotate upward, a horizontally arranged abutment rod (43) is fixed on the inner wall of the air inlet (13), the abutment rod (43) can abut against the bottom surface of the baffle (4) located at the bottom, the inner bottom surface of the casing (1) is provided with a drainage groove (16) connected to the outside, and the inner bottom surface of the air inlet (13) is provided with an inclined surface (131), and the inclined surface (131) is arranged to be inclined downward close to the side of the drainage groove (16).

4. A refrigeration unit according to claim 3, characterized in that: The bottom surface of the air inlet (13) is provided with a positioning groove (51), and the casing (1) is vertically slidably installed with a positioning block (5) through the positioning groove (51). The inner wall of the air inlet (13) is fixed with a guide rod (52), and the guide rod (52) is located directly above the positioning block (5). The pull rope (42) sequentially passes around the abutment rod (43) and the guide rod (52), and the bottom end of the pull rope (42) is fixedly connected to the top surface of the positioning block (5). A sliding block (53) is fixed to the side of the positioning block (5). The inner wall of the positioning groove (51) is provided with a sliding groove (54), and the sliding block (53) is vertically slidably matched with the casing (1) through the sliding groove (54). A spring (55) is fixed to the bottom surface of the positioning block (5), and the bottom end of the spring (55) is fixedly connected to the inner bottom surface of the positioning groove (51).

5. A refrigeration unit according to claim 4, characterized in that: A limiting groove (61) is provided on the inner top surface of the air inlet (13), and a limiting block (6) is installed by sliding vertically on the housing (1) through the limiting groove (61). A second guide rod (62) is fixed to the inner wall of the air inlet (13), and the second guide rod (62) is located directly below the limiting block (6). The top end of the pull rope (42) passes around the second guide rod (62) and is fixedly connected to the bottom surface of the limiting block (6). A reset block (63) is fixed on the side of the positioning block (6); a reset groove (64) is provided on the inner wall of the limiting groove (61); the reset block (63) is slidably matched with the housing (1) in the vertical direction through the reset groove (64); a magnetic attraction block (65) is fixed on the top surface of the limiting block (6); an electromagnet (66) is fixed on the inner top surface of the limiting groove (61); and the electromagnet (66) can attract the magnetic attraction block (65) when energized.

6. A refrigeration unit according to claim 2, characterized in that: A moving rod (24) is fixedly inserted into the moving plate (2), and moving blocks (25) are respectively installed at both ends of the moving rod (24), and the moving blocks (25) are rotatably connected to the moving rod (24). The two mounting plates (31) are respectively provided with connecting grooves (33) on the opposite inner sides, and the moving blocks (25) are slidably matched with the mounting plates (31) along the length direction of the mounting plates (31) through the connecting grooves (33). A cylinder (34) is installed on the mounting frame (3), and the piston rod end of the cylinder (34) is fixedly connected to the side of the moving block (25) away from the fan (14). A rotating component for driving the moving plate (2) to rotate downward is arranged on the mounting frame (3), and a temperature detection sensor (111) is arranged at the bottom of the evaporator (11).

7. A refrigeration unit according to claim 6, characterized in that: The outer periphery of the moving rod (24) is provided with a torsion spring (26), one end of the torsion spring (26) is fixedly connected to the side of the moving plate (2), and the other end of the torsion spring (26) is fixedly connected to the side of the moving block (25). A limiting plate 1 (251) is fixed to the side of the moving block (25) close to the moving plate (2), and a limiting plate 2 (27) is fixed to the side of the moving plate (2) close to the moving block (25). The side of the limiting plate 1 (251) away from the fan (14) can abut against the limiting plate 2 (27).

8. A refrigeration unit according to claim 7, characterized in that: The rotating assembly comprises a contact block (7) fixed on the mounting plate (31), the contact block (7) being capable of contacting the side of the movable plate (2) away from the fan (14), the contact block (7) being located above the movable rod (24), the bottom surface of the contact block (7) being provided with an inclined surface 1 (71), and the inclined surface 1 (71) being located on the side of the contact block (7) close to the fan (14).

9. A refrigeration unit according to claim 8, characterized in that: The bottom surface of the abutment block (7) is provided with a pressing groove (73), and the abutment block (72) is installed on the abutment block (77) through the pressing groove (73) in a vertical sliding manner. A second spring (74) is fixed on the top surface of the pressing block (72), and the top end of the second spring (74) is fixedly connected to the inner top surface of the pressing groove (73).

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