Condensing unit for three-stage cascade refrigeration and using method thereof

Abstract

The invention discloses a condensing unit for three-stage cascade refrigeration and a using method thereof, relates to the technical field of condensing units, and solves the problems that when the condensing unit for three-stage cascade refrigeration is used, a large amount of dust and impurities are attached to an air inlet window, so that the air inlet efficiency is reduced, and the cooling efficiency is further reduced. And the air inlet window is usually cleaned manually after being manually detached, so that the cleaning is very inconvenient. According to the condensing unit for three-stage cascade refrigeration and the using method of the condensing unit, the condensing unit comprises a shell assembly, air inlet windows are formed in the four outer side surfaces of the shell assembly, and turnover mechanisms are arranged at the positions, close to the opposite angles, of the four outer side surfaces of the shell assembly. The air inlet window is blocked through the L-shaped push plate and the second stop block, so that the air inlet window can automatically rotate to be parallel to the ground, the air inlet window can be conveniently cleaned, and the situation that the ventilation efficiency of the device is affected due to the fact that a large amount of impurities or dust is attached to the surface of the air inlet window is avoided.

Description

Technical Field

[0001] The invention relates to the field of condensing units, in particular to a three-stage cascade refrigeration condensing unit and a use method thereof. Background Art

[0002] Condensing units are special refrigeration equipment. They are widely used in a wide range of applications. With the development, condensing units have gradually developed from single-stage to multi-stage cascade type, among which three-stage cascade cryogenic condensing units are the most widely used. Cascade refrigerators usually consist of two separate refrigeration systems, namely the high-temperature subsystem and the low-temperature subsystem. The high-temperature subsystem uses a medium-temperature refrigerant, while the low-temperature subsystem uses a low-temperature refrigerant. The evaporation of the refrigerant in the high-temperature subsystem is used to condense the refrigerant in the low-temperature subsystem. The two parts are connected by a condenser evaporator, which is both the evaporator of the high-temperature subsystem and the condenser of the low-temperature subsystem.

[0003] When the existing three-stage cascade refrigeration condensing unit is in use, the air intake efficiency is often reduced due to a large amount of dust and impurities attached to the air inlet window, which in turn leads to a reduction in cooling efficiency. In addition, the air inlet window is usually cleaned manually after manual removal, which is very inconvenient. Therefore, it does not meet the existing needs. In this regard, we propose a three-stage cascade refrigeration condensing unit and a method of using the same. Summary of the invention

[0004] The object of the present invention is to provide a three-stage cascade refrigeration condensing unit and a method of using the same, so as to solve the problems mentioned in the above background technology that when the three-stage cascade refrigeration condensing unit is in use, a large amount of dust and impurities are often attached to the air inlet window, resulting in reduced air intake efficiency and further reduced cooling efficiency, and the air inlet window is usually manually removed and cleaned manually, which is very inconvenient.

[0005] To achieve the above object, the present invention provides the following technical solution: a three-stage cascade refrigeration condensing unit, comprising a shell assembly, four outer surfaces of the shell assembly are provided with air inlet windows, four outer surfaces of the shell assembly are provided with turning mechanisms at diagonal positions, and a cleaning mechanism is provided at the top of the shell assembly; The housing assembly comprises a unit housing, a window mounting groove, a fixing plate, an electric push rod, a waist hole and a sliding groove, the fixing plates are fixedly installed on both sides of the four outer surfaces of the unit housing, the center of the four outer surfaces of the unit housing is provided with a window mounting groove, the side surface of the fixing plate close to the window mounting groove is provided with a waist hole, the other side surface of the fixing plate is provided with a sliding groove, the outer end of the fixing plate is fixedly installed with an electric push rod, the output end of the electric push rod is slidably inserted into the interior of the sliding groove, and the output end of the electric push rod is fixedly installed with a clamping ring; The air inlet window is movably inserted into the interior of the window body installation groove, and rotating rods are fixedly installed on both side surfaces of the air inlet window. The rotating rods are movably penetrated through the interior of the waist hole and extend to be inserted into the interior of the clamping ring.

[0006] Preferably, the shell assembly also includes a top plate, a connecting bracket, a first blocking block, a second blocking block and a brush cleaning rod, four top plates are fixedly installed on the outside of the top end of the unit casing, connecting brackets are fixedly installed at diagonal positions on the outer surface of the unit casing, first blocking blocks are fixedly installed on both sides of the inner wall surface of the unit casing close to the window mounting groove, second blocking blocks are fixedly installed at the outer end of the fixed plate, three brush cleaning rods are rotatably connected between the two fixed plates located on the same side, a servo motor is provided inside the fixed plate, the output end of the servo motor is connected to the brush cleaning rod through a coupling, and a plurality of brushes are provided on the outer surface of the brush cleaning rod.

[0007] Preferably, the flipping mechanism includes a reduction motor, a rotating shaft and an L-shaped push plate, the reduction motor is fixedly mounted on the outer surface of the unit casing, the output ends of the reduction motors are connected to the rotating shafts through couplings, the rotating shafts are movably inserted into the interior of the unit casing, and L-shaped push plates are movably mounted on both sides of the four outer surfaces of the unit casing, and one end of the L-shaped push plate is fixedly connected to the rotating shaft.

[0008] Preferably, the cleaning mechanism includes a water tank, a spray pipe, a water tank cover, a return pipe, a water pump, a pool, an inclined plate, a three-way pipe and a spray head. The water tanks are fixedly installed at the four end corners of the top of the unit casing, the top of the water tank is movably installed with a water tank cover, one side of the water tank is movably connected with a spray pipe, the bottom end of the spray pipe is provided with a plurality of spray heads, one side of the water tank cover is movably connected with a return pipe, the end of the return pipe is movably connected with a water pump, the bottom end of the water pump is provided with a three-way pipe, four pools are fixedly installed on the outside of the bottom end of the unit casing, the inside of the pools is fixedly installed with inclined plates, and the other two ends of the three-way pipe are movably connected to two adjacent pools respectively.

[0009] Preferably, the cleaning mechanism also includes a water adding chamber, a filter screen, a filter box and filter holes. The top of the water tank cover is provided with a water adding chamber, the inside of the water adding chamber is provided with a filter screen, the bottom end of the water tank cover is movably installed with a filter box, the surface of the filter box is provided with a plurality of filter holes, and the filter box is installed on the inner wall surface of the water adding chamber by bolts.

[0010] Preferably, a vent is provided at the top of the unit casing, and two condenser evaporators are provided inside the unit casing.

[0011] Preferably, two sides of the top surfaces of the two air inlet windows are respectively fitted with the second blocking block and the bottom surfaces of the L-shaped push plate, and the surfaces of the other two air inlet windows are both fitted with the surface of the first blocking block.

[0012] Preferably, the spray pipe is wound around the surface of the top plate, a pressure relief valve is provided inside the water tank near the spray pipe, and the water pump is movably installed inside the connecting bracket.

[0013] Preferably, the outer surface of the water tank is provided with an observation window, the surface of the inclined plate is inclined toward two end angles inside the pool, and the angle between the inclined plate and the bottom of the pool is fifteen degrees.

[0014] A method for using a three-stage cascade refrigeration condensing unit, the method comprising the following steps: Step A: After the device has been used for a long time, the output end can be retracted by driving the electric push rod to drive the rotating rod to move along the direction of the waist hole, and then the rotating rod drives the air inlet window to move out from the inside of the window installation groove. When the air inlet window moves to the position of the L-shaped push plate and hits the surface of the L-shaped push plate, due to the blocking of the air inlet window by the L-shaped push plate, the air inlet window will rotate along the rotating rod as the axis until the air inlet window rotates ninety degrees, and when the air inlet window rotates, it will continue to move along the waist hole until the rotating rod moves to the outer position of the waist hole. At this time, the two sides of the top of the air inlet window will respectively fit with the bottom surface of the L-shaped push plate and the bottom surface of the second blocking block, so that the air inlet window remains parallel to the ground; Step B: By opening the pressure relief valve inside the water tank, the water inside the water tank flows out through the spray pipe. At this time, the water in the water tank passes through the spray pipe and is sprayed out through the spray head, so as to clean the air inlet window below the spray head. At the same time, the servo motor can be started to drive the brush cleaning rod to rotate, so that the brush on the surface of the brush cleaning rod brushes the air inlet window to avoid dust and other debris remaining on the surface of the air inlet window to affect the ventilation efficiency; Step C: After the water has finished cleaning the air inlet window, it will fall down into the water pool. At this time, the water will flow to the position of the three-way pipe through the inclined surface of the inclined plate. At this time, the water can be pumped from the three-way pipe to the inside of the return pipe by a water pump, and the water will flow back to the inside of the water tank cover through the return pipe. At this time, the water will follow the return pipe into the inside of the water filling chamber and fall into the inside of the filter box. It will be filtered by the filter box, and the dust and other impurities in the water will be filtered inside the filter box, so that the cleaner water will flow back to the inside of the water tank for water recycling; Step D: When the device is working outdoors, rainwater can be collected through the water filling chamber and the filter screen, and the rainwater can be filtered through the filter screen to prevent impurities from entering the water tank and affecting the flow of water. When the filter screen and the filter box need to be cleaned, the water tank cover can be manually removed to take the filter screen and the filter box out of the water filling chamber for cleaning; Step E: When the air inlet window is cleaned, the output end can be driven by the electric push rod to push out the rotating rod, so that the rotating rod drives the air inlet window to move to the position of the window mounting slot. When the rotating rod moves to the inner side of the waist hole, the air inlet window is still parallel to the ground, and at the same time, one side of the top surface of the air inlet window is still in contact with the bottom surface of the L-shaped push plate. At this time, the reduction motor can be started to drive the reduction motor to rotate the rotating shaft, thereby driving the L-shaped push plate to rotate, so that the L-shaped push plate rotates downward and pushes the air inlet window, so that the air inlet window rotates again along the rotating rod as the axis. When the air inlet window rotates ninety degrees, it will hit the first blocking block and stop rotating, so that the cleaned air inlet window is re-stuck in the interior of the window mounting slot.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the L-shaped pushing plate, the first blocking block and the second blocking block so that when the device is in use, the L-shaped pushing plate and the second blocking block can block the air inlet window, so that the air inlet window can be automatically rotated to a state parallel to the ground, which is convenient for cleaning the air inlet window, thereby avoiding a large amount of impurities or dust adhering to the surface of the air inlet window and affecting the ventilation efficiency of the device, thereby avoiding affecting the condensation and evaporation efficiency of the device. After the air inlet window is cleaned, the air inlet window can be pushed by the L-shaped pushing plate and blocked by the first blocking block, so that the air inlet window can be reinstalled into the inside of the window mounting groove, which is convenient for the use of the device.

[0016] 2. The present invention cooperates with the filter box and the filter hole so that when the device cleans the air inlet window, the cleaned water can be transported back to the inside of the water tank through the reflux pipe and the water pump, and the water can be recycled after being filtered by the filter box, thereby reducing water loss and thus reducing costs. Rainwater can also be filtered through the filter net so that the cleaning water can be automatically replenished on rainy days. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional front view of the position of the L-shaped push plate of the present invention; Figure 3 It is a cross-sectional side view of the water tank position of the present invention; Figure 4 It is a cross-sectional top view of the position of the reduction motor of the present invention; Figure 5 A cross-sectional top view of the position of the electric push rod of the present invention; Figure 6 For the present invention Figure 1 Schematic diagram of the local structure of part A; Figure 7 For the present invention Figure 2 Schematic diagram of the local structure of part B; Figure 8 For the present invention Figure 2 Schematic diagram of the local structure of part C; Fig. 9 For the present invention Figure 3 Schematic diagram of the local structure of part D.

[0018] In the figure: 1. Shell assembly; 101. Unit shell; 102. Window mounting groove; 103. Fixing plate; 104. Top plate; 105. Connecting bracket; 106. First blocking block; 107. Electric push rod; 108. Second blocking block; 109. Waist hole; 110. Sliding groove; 111. Brush cleaning rod; 2. Ventilation port; 3. Flip mechanism; 301. Speed ​​reducer motor; 302. Rotating shaft; 303. L-shaped pushing plate; 4. Cleaning mechanism; 401. Water tank; 402. Spray pipe; 403. Water tank cover; 404. Reflux pipe; 405. Water pump; 406. Water pool; 407. Inclined plate; 408. Three-way pipe; 409. Spray head; 410. Water adding chamber; 411. Filter screen; 412. Filter box; 413. Filter hole; 5. Air inlet window; 6. Condenser evaporator; 7. Rotating rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 9 The present invention provides an embodiment: a three-stage cascade refrigeration condensing unit, comprising a shell assembly 1, four outer surfaces of the shell assembly 1 are provided with air inlet windows 5, four outer surfaces of the shell assembly 1 are provided with turning mechanisms 3 at diagonal positions, and a cleaning mechanism 4 is provided at the top of the shell assembly 1; The housing assembly 1 includes a unit housing 101, a window mounting groove 102, a fixing plate 103, an electric push rod 107, a waist hole 109 and a sliding groove 110. The fixing plates 103 are fixedly installed on both sides of the four outer surfaces of the unit housing 101. The center of the four outer surfaces of the unit housing 101 is provided with a window mounting groove 102. The side surface of the fixing plate 103 close to the window mounting groove 102 is provided with a waist hole 109. The other side surface of the fixing plate 103 is provided with a sliding groove 110. The outer end of the fixing plate 103 is fixedly installed with an electric push rod 107. The output end of the electric push rod 107 is slidably inserted into the interior of the sliding groove 110. The output end of the electric push rod 107 is fixedly installed with a clamping ring. The air inlet window 5 is movably inserted into the window mounting groove 102 , and rotating rods 7 are fixedly installed on both side surfaces of the air inlet window 5 , and the rotating rods 7 are movably passed through the waist hole 109 and extend to be inserted into the inside of the clamping ring.

[0021] The shell assembly 1 also includes a top plate 104, a connecting bracket 105, a first blocking block 106, a second blocking block 108 and a brush cleaning rod 111. Four top plates 104 are fixedly installed on the outside of the top of the unit casing 101, connecting brackets 105 are fixedly installed at diagonal positions on the outer surface of the unit casing 101, first blocking blocks 106 are fixedly installed on both sides of the inner wall surface of the unit casing 101 close to the window mounting groove 102, second blocking blocks 108 are fixedly installed on the outer ends of the fixed plates 103, three brush cleaning rods 111 are rotatably connected between the two fixed plates 103 located on the same side, a servo motor is provided inside the fixed plate 103, the output end of the servo motor is connected to the brush cleaning rod 111 through a coupling, and a plurality of brushes are provided on the outer surface of the brush cleaning rod 111.

[0022] The flipping mechanism 3 includes a reduction motor 301, a rotating shaft 302 and an L-shaped pushing plate 303. The reduction motor 301 is fixedly installed on the outer surface of the unit housing 101. The output ends of the reduction motor 301 are connected to the rotating shaft 302 through a coupling. The rotating shaft 302 is movably inserted into the interior of the unit housing 101. L-shaped pushing plates 303 are movably installed on both sides of the four outer surfaces of the unit housing 101, and one end of the L-shaped pushing plate 303 is fixedly connected to the rotating shaft 302.

[0023] The cleaning mechanism 4 includes a water tank 401, a spray pipe 402, a water tank cover 403, a return pipe 404, a water pump 405, a water pool 406, an inclined plate 407, a three-way pipe 408 and a spray head 409. The water tank 401 is fixedly installed at the four end corners of the top of the unit housing 101, and the top of the water tank 401 is movably installed with a water tank cover 403. The spray pipe 402 is movably connected to one side of the water tank 401. The bottom of the spray pipe 402 A plurality of sprinkler heads 409 are provided, one side of the water tank cover 403 is movably connected with a return pipe 404, the end of the return pipe 404 is movably connected with a water pump 405, the bottom end of the water pump 405 is provided with a three-way pipe 408, four water pools 406 are fixedly installed on the outside of the bottom end of the unit casing 101, inclined plates 407 are fixedly installed inside the water pools 406, and the other two ends of the three-way pipe 408 are movably connected with two adjacent water pools 406 respectively.

[0024] The cleaning mechanism 4 also includes a water adding chamber 410, a filter screen 411, a filter box 412 and filter holes 413. The top of the water tank cover 403 is provided with a water adding chamber 410, the inside of the water adding chamber 410 is provided with a filter screen 411, and the bottom of the water tank cover 403 is movably installed with a filter box 412. The surface of the filter box 412 is provided with multiple filter holes 413. The filter box 412 is installed on the inner wall surface of the water adding chamber 410 by bolts.

[0025] Through the cooperation of the filter box 412 and the filter hole 413, when the device cleans the air inlet window 5, the cleaned water can be transported back to the inside of the water tank 401 through the reflux pipe 404 and the water pump 405, and the water can be recycled after being filtered by the filter box 412, thereby reducing water loss and thus reducing costs, and rainwater can be filtered through the filter net 411 so as to automatically replenish cleaning water on rainy days.

[0026] A vent 2 is provided at the top of the unit housing 101 , and two condenser evaporators 6 are provided inside the unit housing 101 .

[0027] The two sides of the top surfaces of the two air inlet windows 5 are respectively in contact with the second blocking block 108 and the bottom surfaces of the L-shaped push plate 303 , and the surfaces of the other two air inlet windows 5 are both in contact with the surface of the first blocking block 106 .

[0028] Through the cooperation of the L-shaped pushing plate 303, the first blocking block 106 and the second blocking block 108, when the device is in use, the air inlet window 5 can be blocked by the L-shaped pushing plate 303 and the second blocking block 108, so that the air inlet window 5 can be automatically rotated to a state parallel to the ground, which is convenient for cleaning the air inlet window 5, thereby avoiding a large amount of impurities or dust adhering to the surface of the air inlet window 5 and affecting the ventilation efficiency of the device, thereby avoiding affecting the condensation and evaporation efficiency of the device. After the air inlet window 5 is cleaned, the air inlet window 5 can be pushed by the L-shaped pushing plate 303 and blocked by the first blocking block 106, so that the air inlet window 5 can be reinstalled into the window mounting groove 102, which is convenient for the use of the device.

[0029] The spray pipe 402 is wound around the surface of the top plate 104 , a pressure relief valve is provided inside the water tank 401 near the spray pipe 402 , and a water pump 405 is movably installed inside the connecting bracket 105 .

[0030] The outer surface of the water tank 401 is provided with an observation window, and the surface of the inclined plate 407 is inclined toward the two end corners inside the pool 406, and the angle between the inclined plate 407 and the bottom of the pool 406 is fifteen degrees.

[0031] A method for using a three-stage cascade refrigeration condensing unit, the method comprising the following steps: Step A: After the device has been used for a long time, the output end can be retracted by driving the electric push rod 107 to drive the rotating rod 7 to move along the direction of the waist hole 109, and then the rotating rod 7 drives the air inlet window 5 to move out from the inside of the window mounting groove 102. When the air inlet window 5 moves to the position of the L-shaped pushing plate 303 and hits the surface of the L-shaped pushing plate 303, due to the blocking of the air inlet window 5 by the L-shaped pushing plate 303, the air inlet window 5 will rotate along the rotating rod 7 as the axis until the air inlet window 5 rotates ninety degrees, and when the air inlet window 5 rotates, it will continue to move along the waist hole 109 until the rotating rod 7 moves to the outer position of the waist hole 109, at this time, the two sides of the top of the air inlet window 5 will respectively fit with the bottom surface of the L-shaped pushing plate 303 and the bottom surface of the second blocking block 108, so that the air inlet window 5 remains parallel to the ground; Step B: By opening the pressure relief valve inside the water tank 401, the water inside the water tank 401 flows out through the spray pipe 402. At this time, the water in the water tank 401 passes through the spray pipe 402 and is sprayed out through the spray head 409, so as to clean the air inlet window 5 located below the spray head 409. At the same time, the servo motor can be started to drive the brush cleaning rod 111 to rotate, so that the brush on the surface of the brush cleaning rod 111 brushes the air inlet window 5, so as to avoid dust and other debris remaining on the surface of the air inlet window 5 and affecting the ventilation efficiency; Step C: After the water has finished cleaning the air inlet window 5, it will fall downward into the water pool 406. At this time, the water will flow to the position of the three-way pipe 408 through the inclined surface of the inclined plate 407. At this time, the water can be pumped from the three-way pipe 408 to the inside of the return pipe 404 by the water pump 405, and the water will flow back to the inside of the water tank cover 403 through the return pipe 404. At this time, the water will follow the return pipe 404 into the inside of the water adding chamber 410, and fall into the inside of the filter box 412. The water will be filtered by the filter box 412, and the dust and other impurities in the water will be filtered in the filter box 412, so that the cleaner water will flow back to the inside of the water tank 401 for water recycling; Step D: When the device is working outdoors, rainwater can be collected through the water adding chamber 410 and the filter 411, and the rainwater can be filtered through the filter 411 to prevent impurities from entering the water tank 401 and affecting the flow of water. When it is necessary to clean the filter 411 and the filter box 412, the water tank cover 403 can be manually removed to remove the filter 411 and the filter box 412 from the water adding chamber 410 for cleaning; Step E: When the air inlet window 5 is cleaned, the output end can be driven by the electric push rod 107 to push out the rotating rod 7, so that the rotating rod 7 drives the air inlet window 5 to move to the position of the window mounting groove 102. When the rotating rod 7 moves to the inner side of the waist hole 109, the air inlet window 5 is still parallel to the ground, and at the same time, one side of the top surface of the air inlet window 5 is still in contact with the bottom surface of the L-shaped push plate 303. At this time, the reduction motor 301 can be started to drive the reduction motor 301 to rotate the rotating shaft 302, thereby driving the L-shaped push plate 303 to rotate, so that the L-shaped push plate 303 rotates downward and pushes the air inlet window 5, so that the air inlet window 5 rotates again along the rotating rod 7 as the axis. After the air inlet window 5 rotates ninety degrees, it will hit the first blocking block 106 and stop rotating, so that the cleaned air inlet window 5 is re-stuck in the interior of the window mounting groove 102.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A three-stage cascade refrigeration condensing unit, comprising a housing assembly (1), characterized in that: The four outer surfaces of the shell assembly (1) are each provided with an air inlet window (5), the four outer surfaces of the shell assembly (1) are each provided with a flip mechanism (3) at a diagonal position, and the top of the shell assembly (1) is provided with a cleaning mechanism (4); The housing assembly (1) comprises a unit housing (101), a window mounting groove (102), a fixing plate (103), an electric push rod (107), a waist hole (109) and a sliding groove (110); the fixing plates (103) are fixedly mounted on both sides of the four outer surfaces of the unit housing (101); the center of the four outer surfaces of the unit housing (101) is provided with a window mounting groove (102); the side surface of the fixing plate (103) close to the window mounting groove (102) is provided with a waist hole (109); the other side surface of the fixing plate (103) is provided with a sliding groove (110); the outer end of the fixing plate (103) is fixedly mounted with an electric push rod (107); the output end of the electric push rod (107) is slidably inserted into the interior of the sliding groove (110); and the output end of the electric push rod (107) is fixedly mounted with a clamping ring; The air inlet window (5) is movably snapped into the interior of the window body mounting groove (102), and rotating rods (7) are fixedly mounted on both side surfaces of the air inlet window (5), and the rotating rods (7) are movably penetrated through the interior of the waist hole (109) and extend to snap into the interior of the clamping ring.

2. A three-stage cascade refrigeration condensing unit according to claim 1, characterized in that: The housing assembly (1) further comprises a top plate (104), a connecting bracket (105), a first blocking block (106), a second blocking block (108) and a brush cleaning rod (111); four top plates (104) are fixedly mounted on the outer side of the top of the unit housing (101); connecting brackets (105) are fixedly mounted at diagonal positions of the outer surface of the unit housing (101); first blocking blocks (106) are fixedly mounted on both sides of the inner wall surface of the unit housing (101) close to the window mounting groove (102); second blocking blocks (108) are fixedly mounted on the outer ends of the fixing plates (103); three brush cleaning rods (111) are rotatably connected between two fixing plates (103) located on the same side; a servo motor is arranged inside the fixing plate (103); the output end of the servo motor is connected to the brush cleaning rod (111) via a coupling; and a plurality of brushes are arranged on the outer surface of the brush cleaning rod (111).

3. A three-stage cascade refrigeration condensing unit according to claim 2, characterized in that: The tilting mechanism (3) comprises a reduction motor (301), a rotating shaft (302) and an L-shaped pushing plate (303); the reduction motor (301) is fixedly mounted on the outer surface of the unit housing (101); the output end of the reduction motor (301) is connected to the rotating shaft (302) via a coupling; the rotating shaft (302) is movably inserted into the unit housing (101); L-shaped pushing plates (303) are movably mounted on both sides of four outer surfaces of the unit housing (101); one end of the L-shaped pushing plate (303) is fixedly connected to the rotating shaft (302).

4. A three-stage cascade refrigeration condensing unit according to claim 3, characterized in that: The cleaning mechanism (4) comprises a water tank (401), a spray pipe (402), a water tank cover (403), a return pipe (404), a water pump (405), a water pool (406), an inclined plate (407), a three-way pipe (408) and a spray head (409). The water tank (401) is fixedly mounted at four end corners of the top of the unit housing (101). The top of the water tank (401) is movably mounted with a water tank cover (403). One side of the water tank (401) is movably connected to the spray pipe (402). The spray pipe (402) A plurality of spray heads (409) are provided at the bottom end of the water tank cover (403); a return pipe (404) is movably connected to one side of the water tank cover (403); a water pump (405) is movably connected to the end of the return pipe (404); a tee pipe (408) is provided at the bottom end of the water pump (405); four water pools (406) are fixedly installed on the outside of the bottom end of the unit casing (101); inclined plates (407) are fixedly installed inside the water pools (406); and the other two ends of the tee pipe (408) are movably connected to two adjacent water pools (406) respectively.

5. A three-stage cascade refrigeration condensing unit according to claim 4, characterized in that: The cleaning mechanism (4) further comprises a water adding chamber (410), a filter screen (411), a filter box (412) and filter holes (413); the top of the water tank cover (403) is provided with a water adding chamber (410); the interior of the water adding chamber (410) is provided with a filter screen (411); the bottom of the water tank cover (403) is movably provided with a filter box (412); the surface of the filter box (412) is provided with a plurality of filter holes (413); and the filter box (412) is mounted on the inner wall surface of the water adding chamber (410) by means of bolts.

6. A three-stage cascade refrigeration condensing unit according to claim 1, characterized in that: A vent (2) is provided at the top of the unit casing (101), and two condenser evaporators (6) are provided inside the unit casing (101).

7. A three-stage cascade refrigeration condensing unit according to claim 3, characterized in that: The two sides of the top surfaces of two of the air inlet windows (5) are respectively fitted with the second blocking block (108) and the bottom surface of the L-shaped push plate (303), and the surfaces of the other two air inlet windows (5) are both fitted with the surface of the first blocking block (106).

8. The three-stage cascade refrigeration condensing unit according to claim 5, characterized in that: The spray pipe (402) is wound around the surface of the top plate (104), a pressure relief valve is provided in the water tank (401) at a position close to the spray pipe (402), and the water pump (405) is movably installed inside the connecting bracket (105).

9. A three-stage cascade refrigeration condensing unit according to claim 5, characterized in that: The outer surface of the water tank (401) is provided with an observation window, the surface of the inclined plate (407) is inclined toward two end corners inside the pool (406), and the angle between the inclined plate (407) and the bottom of the pool (406) is fifteen degrees.

10. A three-stage cascade refrigeration condensing unit according to any one of claims 1 to 9 and a method of using the same, characterized in that: The method of use comprises the following steps: Step A: After the device has been used for a long time, the output end can be retracted by driving the electric push rod (107) to drive the rotating rod (7) to move along the direction of the waist hole (109), thereby causing the rotating rod (7) to drive the air inlet window (5) to move out from the inside of the window mounting groove (102). When the air inlet window (5) moves to the position of the L-shaped push plate (303) and hits the surface of the L-shaped push plate (303), the air inlet window (5) is blocked by the L-shaped push plate (303). , the air inlet window (5) will rotate along the rotating rod (7) as the axis until the air inlet window (5) rotates ninety degrees, and when the air inlet window (5) rotates, it will continue to move along the waist hole (109) until the rotating rod (7) moves to the outer side of the waist hole (109), at which time, the two sides of the top of the air inlet window (5) will respectively fit with the bottom surface of the L-shaped pushing plate (303) and the bottom surface of the second blocking block (108), so that the air inlet window (5) remains parallel to the ground; Step B: opening the pressure relief valve inside the water tank (401) to allow the water inside the water tank (401) to flow out through the spray pipe (402). At this time, the water in the water tank (401) passes through the spray pipe (402) and is sprayed out through the spray head (409), thereby cleaning the air inlet window (5) located below the spray head (409). At the same time, the servo motor can be started to drive the brush cleaning rod (111) to rotate, so that the brush on the surface of the brush cleaning rod (111) brushes the air inlet window (5), thereby preventing dust and other debris from remaining on the surface of the air inlet window (5) and affecting the ventilation efficiency. Step C: After the water has finished cleaning the air inlet window (5), it will fall downward into the interior of the water pool (406). At this time, the water will flow to the position of the three-way pipe (408) through the inclined surface of the inclined plate (407). At this time, the water can be pumped from the three-way pipe (408) to the interior of the return pipe (404) by the water pump (405), and the water can be returned to the interior of the water tank cover (403) through the return pipe (404). At this time, the water will follow the return pipe (404) into the interior of the water supply chamber (410) and fall into the interior of the filter box (412). The water will be filtered by the filter box (412), and impurities such as dust in the water will be filtered in the filter box (412), so that the cleaner water will flow back to the interior of the water tank (401) for water recycling; Step D: When the device is working outdoors, rainwater can be collected through the water adding chamber (410) and the filter screen (411), and the rainwater can be filtered through the filter screen (411) to prevent impurities from entering the water tank (401) and affecting the flow of water. When it is necessary to clean the filter screen (411) and the filter box (412), the water tank cover (403) can be manually removed to remove the filter screen (411) and the filter box (412) from the water adding chamber (410) for cleaning; Step E: After the air inlet window (5) is cleaned, the electric push rod (107) can be used to drive the output end to push out the rotating rod (7), so that the rotating rod (7) drives the air inlet window (5) to move to the position of the window mounting groove (102). When the rotating rod (7) moves to the inner side of the waist hole (109), the air inlet window (5) is still parallel to the ground, and at the same time, one side of the top surface of the air inlet window (5) is still in contact with the bottom surface of the L-shaped push plate (303). At this time, the air inlet window (5) can be cleaned by starting The reduction motor (301) is driven to drive the rotating shaft (302) to rotate, thereby driving the L-shaped pushing plate (303) to rotate, so that the L-shaped pushing plate (303) rotates downward to push the air inlet window (5), so that the air inlet window (5) rotates again along the rotating rod (7) as the axis. When the air inlet window (5) rotates 90 degrees, it hits the first blocking block (106) and stops rotating, so that the cleaned air inlet window (5) is re-engaged in the window mounting groove (102).

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