A refrigeration unit

Abstract

The present application discloses a refrigeration unit, belonging to the technical field of refrigeration equipment. It includes a casing, an evaporator is installed inside the casing, several air inlets are arranged on the side surface of the casing, a fan is arranged inside the air inlets, a moving plate is slidably installed vertically inside the casing, a driving component for driving the moving plate to move vertically is arranged inside the casing, a water pipe is fixed to the side surface of the moving plate, several spray heads arranged at equal intervals are arranged on the side of the water pipe close to the fan, a water collecting tank is arranged at the bottom of the casing, the water collecting tank is located directly below the evaporator, a through hole I communicating with the water collecting tank is opened on the outer side surface of the casing, a water pump is installed inside the casing, the water inlet of the water pump is communicated with the water collecting tank, the water outlet of the water pump is connected with a hose, and the hose is communicated with the water pipe. In the present application, the fan is sprayed with water through the spray heads, so as to clean the dust on the fan blades, and the cleaning efficiency is high.

Description

Technical Field

[0001] This application relates to the technical field of refrigeration equipment, and particularly to a refrigeration unit. Background Art

[0002] With the continuous development of industrialization and technology, refrigeration technology is increasingly widely used in multiple fields, including industries such as air conditioners, cold storages, food processing, and pharmaceutical refrigeration. 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 existing refrigeration units adopt the compression refrigeration principle and work through components such as compressors, evaporators, condensers, and expansion valves.

[0003] Refrigeration units generally operate in an open environment, and the air may contain various dusts, dirt, and fine particles. During the operation of the refrigeration unit, the fan continuously sucks in air, and these particles enter the air inlet with the air flow and adhere to the fan. When the fan is severely dusty, it may lead to insufficient air flow, resulting in a poor heat dissipation effect of the evaporator. The inefficient heat exchange process easily causes the evaporator to frost, thereby affecting the refrigeration 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 to maintain the normal operation of the fan, but the manual cleaning efficiency is low. Summary of the Invention

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

[0005] The refrigeration unit provided by this application adopts the following technical solutions:

[0006] A refrigeration unit includes a housing. An evaporator is installed inside the housing. A plurality of air inlets are provided on the side surface of the housing. A fan is arranged inside the air inlet. A moving plate is slidably installed vertically inside the housing. A driving component for driving the moving plate to move vertically is arranged inside the housing. A water pipe is fixed to the side surface of the moving plate. A plurality of spray heads are arranged at equal intervals on the side of the water pipe close to the fan. A water collecting tank is arranged at the bottom of the housing, and the water collecting tank is located directly below the evaporator. A through hole I communicating with the water collecting tank is opened on the outer side surface of the housing. A water pump is installed inside the housing. The water inlet of the water pump is communicated with the water collecting tank, and the water outlet of the water pump is connected with a hose, and the hose is communicated with the water pipe.

[0007] By adopting the above technical solutions, 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 fall into the water collecting tank. The water pump transports the water in the water collecting tank to the water pipe through the hose, and then sprays water on the fan through the spray heads, thereby cleaning the dust on the fan blades, and the cleaning efficiency is high.

[0008] Preferably, the driving assembly includes a mounting frame, the moving 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 rod and a guide rod are mounted in the casing, the screw rod is rotatably connected to the casing, one of the mounting plates is sleeved on the outer periphery of the screw rod, the screw rod is in threaded driving cooperation with the mounting plate, the other mounting plate is sleeved on the outer periphery of the guide rod, a motor is mounted in the casing, and the output end of the motor is fixedly connected to the end of the screw rod.

[0009] By adopting the above technical solution, when the motor is started, the motor drives the screw rod to rotate, the screw rod drives the mounting frame to slide vertically, and the mounting frame drives the moving plate to slide vertically, so as to facilitate the nozzle to spray water on the fan for cleaning.

[0010] Preferably, a plurality of baffles are arranged in the air inlet, the distance between two adjacent baffles is equal to half of the width of the baffle, rotating shafts are respectively fixed on both sides of the baffle, the rotating shafts are rotatably connected to the casing, two pull ropes are fixed on the side of the baffle away from the fan, the pull ropes can drive the side of the baffle away from the fan to rotate upward, a horizontally arranged abutting rod I is fixed on the inner wall of the air inlet, the abutting rod I can abut against the bottom surface of the baffle at the bottom, a drainage groove communicating with the outside is opened on the inner bottom surface of the casing, and an inclined surface III is arranged on the inner bottom surface of the air inlet, and the inclined surface III is inclined downward near the drainage groove.

[0011] By adopting the above technical solution, when the refrigeration unit works, the baffles are all in a horizontal state, so as to facilitate the outside air to enter the casing through the air inlet; when the nozzle cleans the fan, the pull ropes can drive the baffles to rotate upward, so that the sides of two adjacent baffles are attached to each other, and the top surface of the baffle faces the direction close to the fan, so as to facilitate the nozzle to clean the baffles while cleaning the fan, and the sewage after cleaning flows to the drainage groove through the inclined surface III and is discharged to the outside of the casing.

[0012] Preferably, a positioning groove is opened on the bottom surface of the air inlet, the casing is slidably mounted vertically through the positioning groove with a positioning block, a guide rod I is fixed on the inner wall of the air inlet, the guide rod I is located directly above the positioning block, the pull rope sequentially bypasses the abutting rod I and the guide rod I, the bottom end of the pull rope is fixedly connected to the top surface of the positioning block, a slider is fixed on the side surface of the positioning block, a sliding groove is opened on the inner wall of the positioning groove, and the slider is slidably matched with the casing vertically through the sliding groove, a spring I is fixed on the bottom surface of the positioning block, and the bottom end of the spring I is fixedly connected to the inner bottom surface of the positioning groove.

[0013] By adopting the above technical solution, when the refrigeration unit is working, under the elastic force of the first spring, the positioning block drives the pull rope to be in a taut state. The baffle at the bottom abuts against the first abutting rod, and the baffle maintains a horizontal state.

[0014] Preferably, a limiting groove is formed in the inner top surface of the air inlet. The casing is slidably installed vertically along the limiting groove with a limiting block. A second guiding rod is fixed to the inner wall of the air inlet and is located directly below the limiting block. The top end of the pull rope bypasses the second guiding rod and is fixedly connected to the bottom surface of the limiting block. A reset block is fixed to the side surface of the limiting block. A reset groove is formed in the inner wall of the limiting groove. The reset block is slidably matched with the casing vertically through the reset groove. A magnetic attraction block is fixed to the top surface of the limiting block, and an electromagnet is fixed to the inner top surface of the limiting groove. The electromagnet can attract the magnetic attraction block after being energized.

[0015] By adopting the above technical solution, 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 attraction block, the limiting 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 face the direction close to the fan, facilitating the nozzle to clean the dust accumulated on the top surface of the baffle.

[0016] Preferably, a moving rod is fixedly inserted through the moving plate. Moving blocks are respectively installed at both ends of the moving rod. The moving blocks are rotatably connected to the moving rod. Connecting grooves are respectively formed in the relative inner sides of the two mounting plates. The moving blocks are slidably 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. The end of the piston rod of the cylinder is fixedly connected to the side surface of the moving block away from the fan. A rotating assembly for driving the moving plate to rotate downward is arranged on the mounting frame. A temperature detection sensor is arranged at the bottom of the evaporator.

[0017] By adopting the above technical solution, the temperature detection sensor can detect the temperature on the outer surface of the evaporator. When the evaporator is frosted, the temperature is lower than 0°C, the cylinder is started, the cylinder drives the moving plate to move towards the evaporator, and the rotating assembly pushes the moving plate to rotate downward, so that the nozzle faces the top of the evaporator, and the nozzle sprays water on the evaporator, thereby accelerating the melting efficiency of the frost layer on the evaporator.

[0018] Preferably, a torsion spring is sleeved on the outer periphery of the moving rod. One end of the torsion spring is fixedly connected to the side surface of the moving plate, and the other end of the torsion spring is fixedly connected to the side surface of the moving block. A first limiting plate is fixed to the side surface of the moving block close to the moving plate, and a second limiting plate is fixed to the side surface of the moving plate close to the moving block. The side of the first limiting plate away from the fan can abut against the second limiting plate.

[0019] By adopting the above technical solution, when the nozzle cleans the fan, the moving plate rotates under the elastic force of the torsion spring, so that the first limiting plate abuts against the second limiting plate, thereby keeping the moving plate in a vertical state.

[0020] Preferably, the rotating assembly includes an abutting block fixed on the mounting plate. The abutting block can abut against the side surface of the moving plate away from the fan. The abutting block is located above the moving rod. A first inclined surface is arranged on the bottom surface of the abutting block, and the first inclined surface is located on the side of the abutting block close to the fan.

[0021] By adopting the above technical solution, when the moving plate moves in a direction away from the fan, the moving plate contacts the first inclined surface, and the top of the moving plate abuts against the abutting block and rotates downward, so that the nozzle is arranged downward.

[0022] Preferably, a pressing groove is formed on the bottom surface of the abutting block. The abutting block is vertically slidably installed with a pressing block 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 with the inner top surface of the pressing groove.

[0023] By adopting the above technical solution, when the moving plate rotates downward and is located below the abutting block, the pressing block moves downward under the elastic force of the second spring, thereby pushing the moving plate to continue rotating downward, so that the nozzle is arranged toward one side close to the top of the evaporator, facilitating the nozzle to spray water on the evaporator.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 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 drip into the water collecting tank. The water pump transports the water in the water collecting tank through the hose into the water pipe, and then sprays water on the fan through the nozzle, thereby cleaning the dust on the fan blades with high cleaning efficiency.

[0026] 2. When the refrigeration unit works, the baffles are all 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 baffles to rotate upward, so that the sides of two adjacent baffles are in contact with each other, and the top surface of the baffle faces toward the direction close to the fan, facilitating the nozzle to clean the baffle while cleaning the fan. The cleaned sewage flows to the drainage tank through the third inclined surface and is discharged outside the casing.

[0027] 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 and works, the electromagnet attracts the magnetic attraction block, the limit block drives the pull rope to move upward, the pull rope drives the baffle to rotate upward, so that the top surface of the baffle rotates to face the direction close to the fan, facilitating the nozzle to clean the dust accumulated on the top surface of the baffle. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of the refrigeration unit of the embodiment of the present application.

[0029] Figure 2 is the schematic diagram of the internal structure of the housing of the refrigeration unit of the embodiment of the present application.

[0030] Figure 3 is the structural schematic diagram of the mounting rack in the refrigeration unit of the embodiment of the present application.

[0031] Figure 4 is the cross-sectional view of the abutting block in the refrigeration unit of the embodiment of the present application.

[0032] Figure 5 is the cross-sectional view of the housing in the refrigeration unit of the embodiment of the present application.

[0033] Figure 6 is Figure 5 the enlarged schematic diagram at A in

[0034] Figure 7 is Figure 5 the enlarged schematic diagram at B in

[0035] Reference Numerals: 1, housing; 11, evaporator; 111, temperature detection sensor; 12, water collecting tank; 121, through hole one; 13, air inlet; 131, inclined surface 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, limiting plate one; 26, torsion spring; 27, limiting plate two; 3, mounting rack; 31, mounting plate; 32, connecting plate; 33, connecting groove; 34, cylinder; 35, screw rod; 36, guide rod; 37, motor; 4, baffle; 41, rotating shaft; 42, pull rope; 43, abutting rod one; 5, positioning block; 51, positioning groove; 52, guide rod one; 53, slider; 54, sliding groove; 55, spring one; 6, limiting block; 61, limiting groove; 62, guide rod two; 63, reset block; 64, reset groove; 65, magnetic attraction block; 66, electromagnet; 7, abutting block; 71, inclined surface one; 72, pressing block; 73, pressing groove; 74, spring two. Detailed Embodiment

[0036] The following details the embodiments of the present application, and the examples of the embodiments are shown in the drawings.

[0037] In the description of this specification, the descriptions referring to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0038] An embodiment of this application discloses a refrigeration unit. Referring to Figure 1 and Figure 2 , the refrigeration unit includes a housing 1, and an evaporator 11 is installed inside the housing 1. A water collecting tank 12 is arranged at the bottom of the housing 1, the water collecting tank 12 is located directly below the evaporator 11, and a through hole 121 communicating with the water collecting tank 12 is formed on the outer side surface of the housing 1. A plurality of air inlets 13 are arranged on the side surface of the housing 1, and fans 14 are arranged inside the air inlets 13.

[0039] Referring to Figure 2 and Figure 3 , a moving plate 2 is slidably installed vertically inside the housing 1, a water pipe 21 is fixed to the side surface of the moving plate 2, and a plurality of spray nozzles 22 arranged at equal intervals are arranged on one side of the water pipe 21 close to the fan 14. A water pump 15 is installed inside the housing 1, and the water inlet of the water pump 15 communicates with the bottom of the water collecting tank 12. The water outlet of the water pump 15 is connected to a hose 23, and the hose 23 communicates with the water pipe 21. An installation frame 3 is arranged inside the housing 1, and the installation frame 3 includes two horizontally arranged installation plates 31, and a connecting plate 32 is fixed between the two installation plates 31.

[0040] Referring to Figure 2 and Figure 4 , a moving rod 24 is fixedly installed through the moving plate 2, 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 formed on the opposite inner sides of the two installation plates 31, and the moving blocks 25 are slidably matched with the installation plates 31 along the length direction of the installation plates 31 through the connecting grooves 33. A cylinder 34 is installed on the installation frame 3, and the end of the piston rod of the cylinder 34 is fixedly connected to the side surface of the moving block 25 away from the fan 14.

[0041] Referring to Figure 2 and Figure 3, a vertical screw rod 35 and a guide rod 36 are installed inside the casing 1, and the screw rod 35 is rotatably connected to the casing 1. One of the mounting plates 31 is sleeved on the outer periphery of the screw rod 35, and the screw rod 35 is in threaded driving cooperation with the mounting plate 31. The other mounting plate 31 is sleeved on the outer periphery of the guide rod 36. A motor 37 is installed inside the casing 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, 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 as to facilitate the nozzle 22 to spray water on the fan 14 for cleaning.

[0042] Refer to Figure 5 and Figure 6 , a plurality of baffles 4 are arranged inside the air inlet 13, and the distance between two adjacent baffles 4 is equal to half of the width of the baffle 4. Rotating shafts 41 are respectively 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 first abutting rod 43 arranged horizontally is fixed on the inner wall of the air inlet 13, and the first abutting rod 43 can abut against the bottom surface of the baffle 4 at the bottom. A drain groove 16 communicating with the outside is opened on the inner bottom surface of the casing 1, and an inclined surface three 131 is arranged on the inner bottom surface of the air inlet 13, and the inclined surface three 131 is inclined downward on the side close to the drain groove 16.

[0043] Refer to Figure 5 and Figure 6 , a positioning groove 51 is opened on the bottom surface of the air inlet 13, and the casing 1 is slidably installed vertically through the positioning groove 51 with a positioning block 5. A first guide rod 52 arranged horizontally is fixed on the inner wall of the air inlet 13, and the first guide rod 52 is located directly above the positioning block 5. The pull rope 42 sequentially bypasses the first abutting rod 43 and the first 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 slider 53 is fixed on the side surface of the positioning block 5, a sliding groove 54 is opened on the inner wall of the positioning groove 51, and the slider 53 is slidably matched with the casing 1 vertically through the sliding groove 54. A first spring 55 is fixed on the bottom surface of the positioning block 5, and the bottom end of the first spring 55 is fixedly connected to the inner bottom surface of the positioning groove 51.

[0044] Refer to Figure 6 and Figure 7, a limiting groove 61 is formed on the inner top surface of the air inlet 13, and a limiting block 6 is slidably installed vertically along the limiting groove 61 on the casing 1. A second guiding rod 62 is fixed to the inner wall of the air inlet 13, and the second guiding rod 62 is located directly below the limiting block 6. The top end of the pull rope 42 bypasses the second guiding rod 62 and is fixedly connected to the bottom surface of the limiting block 6. A reset block 63 is fixed to the side surface of the limiting block 6, a reset groove 64 is formed on the inner wall of the limiting groove 61, and the reset block 63 is slidably engaged with the casing 1 vertically through the reset groove 64. A magnetic attraction 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 attraction block 65 after being energized.

[0045] When the refrigeration unit is working, the electromagnet 66 is de-energized, and the positioning block 5 drives the pull rope 42 to be in a taut state under the elastic force of the first spring 55. The baffle 4 at the bottom abuts against the first abutting rod 43, and all the baffles 4 are in a horizontal state, so as to facilitate the outside air to enter the casing 1 through the air inlet 13; when the nozzle 22 cleans the fan 14, the electromagnet 66 is energized to work, the electromagnet 66 attracts the magnetic attraction block 65, the limiting block 6 drives the pull rope 42 to move upward, the pull rope 42 drives the baffle 4 to rotate upward, so that the sides of two adjacent baffles 4 are attached to each other, and the top surface of the baffle 4 faces the direction close to the fan 14, so as to facilitate the nozzle 22 to clean the baffle 4 while cleaning the fan 14. The cleaned sewage flows to the drainage groove 16 through the third inclined surface 131 and is discharged to the outside of the casing 1.

[0046] Refer to Figure 3 and Figure 4 , a torsion spring 26 is sleeved on the outer periphery of the moving rod 24. One end of the torsion spring 26 is fixedly connected to the side surface of the moving plate 2, and the other end of the torsion spring 26 is fixedly connected to the side surface of the moving block 25. A first limiting plate 251 is fixed to the side surface of the moving block 25 close to the moving plate 2, a second limiting plate 27 is fixed to the side surface of the moving plate 2 close to the moving block 25, and the side of the first limiting plate 251 away from the fan 14 can abut against the second limiting plate 27. An abutting block 7 is fixed to the side surface of the mounting plate 31 close to the moving plate 2, and the abutting block 7 can abut against the side surface of the moving plate 2 away from the fan 14. The abutting block 7 is located above the moving rod 24, and a first inclined surface 71 is arranged on the bottom surface of the abutting block 7, and the first inclined surface 71 is located on the side of the abutting block 7 close to the fan 14.

[0047] Refer to Figure 2 and Figure 4 , a pressing groove 73 is formed on the bottom surface of the abutting block 7, and a pressing block 72 is slidably installed vertically along the pressing groove 73 on the abutting block 7. A second spring 74 is fixed to 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. A temperature detection sensor 111 is arranged at the bottom of the evaporator 11, and the temperature detection sensor 111 can detect the temperature on the outer surface of the evaporator 11.

[0048] 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 moving plate 2 to move towards the direction close to the evaporator 11. The moving plate 2 contacts the first inclined surface 71, and the top of the moving plate 2 abuts against the abutting block 7 and rotates downward, so that the nozzle 22 is arranged downward; when the moving plate 2 continues to move and is located below the abutting block 7, the pressing block 72 moves downward under the elastic force of the second spring 74, and then pushes the moving plate 2 to continue to rotate downward, so that the nozzle 22 is arranged towards the side close to the top of the evaporator 11, so as to facilitate the nozzle 22 to spray water on the evaporator 11, thereby accelerating the melting efficiency of the frost layer on the evaporator 11.

[0049] The implementation principle of an embodiment of a refrigeration unit in this application is as follows: during the refrigeration process, water vapor in the air will condense on the low-temperature surface of the evaporator 11, and the condensed water droplets will fall into the water collecting tank 12. The water pump 15 transports the water in the water collecting tank 12 to the water pipe 21 through the hose 23, and then sprays water on the fan 14 through the nozzle 22, so as to clean the dust on the blades of the fan 14, and the cleaning efficiency is high.

[0050] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to 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) arranged at equal intervals are arranged 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); 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); 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).

2. A refrigeration unit according to claim 1, 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).

3. A refrigeration unit according to claim 2, 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).

4. A refrigeration unit according to claim 3, 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.

5. A refrigeration unit according to claim 1, 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).

6. A refrigeration unit according to claim 5, 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).

7. A refrigeration unit according to claim 6, 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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