A refrigeration air conditioning unit convenient for defrosting

Abstract

The present invention discloses a refrigeration and air conditioning unit that is convenient for defrosting, comprising a refrigeration and air conditioning unit body and a base, wherein the bottom end of the refrigeration and air conditioning unit body is connected to the base, and universal wheels are installed on both sides of the bottom end of the base, and a compressor is installed on one side of the inner wall of the refrigeration and air conditioning unit body. When the refrigeration and air conditioning unit that is convenient for defrosting is used, the heat of the compressor when working is used to defrost the evaporator, thereby reducing energy consumption, and the fixing effect between the base and the ground is increased by a supporting mechanism, and the supporting mechanism drives the auxiliary mechanism to work, and then the cleaning scraper and the dustproof mesh plate are rubbed to clean it, preventing the dustproof mesh plate from being blocked and affecting the dustproof effect, and the refrigeration and air conditioning unit body is clamped and limited by a limiting mechanism, thereby preventing it from moving randomly on the base, so that when the refrigeration and air conditioning unit is used, it plays a role of facilitating stable limiting.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration and air conditioning units, in particular to a refrigeration and air conditioning unit which is convenient for defrosting. Background Art

[0002] Refrigeration air-conditioning unit is a kind of air-conditioning equipment specially used in refrigeration environment. Its main function is to maintain the low temperature environment inside the cold storage to ensure the quality and safety of stored food. It is mainly composed of compressor, air-side heat exchanger, throttling mechanism, auxiliary refrigeration accessories and electronic control system. There are various types of refrigeration air-conditioning units, including piston type, screw type and centrifugal type, and different types of compressors have their own characteristics.

[0003] In order to maintain the low temperature environment inside the cold storage, when the assistance of the refrigeration and air conditioning unit is needed, the base is first moved to the designated location through the universal wheels, and the compressor inside the refrigeration and air conditioning unit is started. At this time, the compressor compresses the refrigerant into high-temperature and high-pressure gas, and then sends it to the condenser for heat dissipation and cooling, turning it into a high-pressure liquid. Then, the high-pressure liquid is throttled and reduced in pressure by the expansion valve, and becomes a low-temperature and low-pressure gas-liquid mixture, and then enters the evaporator to absorb the heat in the cold storage, thereby achieving the purpose of cooling; but during the use of the refrigeration and air conditioning unit, the water vapor in the environment is easy to frost on the surface of the evaporator. At this time, the staff usually uses the direct heating method of the electric heating wire for defrosting. However, this defrosting method consumes a lot of heating energy, which affects the use of the refrigeration and air conditioning unit. Summary of the invention

[0004] The object of the present invention is to provide a refrigeration and air conditioning unit that is easy to defrost, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a refrigeration and air conditioning unit that is easy to defrost, comprising a refrigeration and air conditioning unit body and a base, wherein the bottom end of the refrigeration and air conditioning unit body is connected to the base, and universal wheels are installed on both sides of the bottom end of the base, a compressor is installed on one side of the inner wall of the refrigeration and air conditioning unit body, and the top of the compressor is connected to a condenser through an output pipe, and one side of the outer wall of the condenser is connected to an evaporator through an expansion valve, a heat sink is sleeved on the outer wall of the compressor, and the inside of the heat sink is connected to an input pipe A through a cooling cavity, and the side of the input pipe A away from the heat sink is connected to a liquid storage tank, The side of the outer wall of the liquid storage tank away from the input pipe A is connected to the input pipe B, and the side of the bottom of the liquid storage tank is connected to the return pipe A, and the other side of the bottom of the liquid storage tank is connected to the return pipe B. A supporting mechanism is arranged on one side of the outer wall of the refrigeration air conditioner body, and the supporting mechanism includes a protective box, a servo motor, a rotating column, a gear, a rack, a guide seat, a fixed rod and a fixed suction cup. The protective box is connected to the base, and a rotating column is installed in the middle of the outer wall of the protective box. The output end of the rotating column is connected to a gear, and the gear is meshed with a rack. A heat dissipation hole is opened at the top of the outer wall of the refrigeration air conditioner body.

[0006] Preferably, one side of the outer wall of the return pipe B is connected to the evaporator, and one side of the outer wall of the return pipe A is connected to the heat sink.

[0007] Preferably, a guide seat is welded to the middle of the outer wall of the rack, and a fixing rod is slidably connected to the inside of the guide seat.

[0008] Preferably, a fixed suction cup is connected to the bottom end of the outer wall of the rack, and the upper and lower sides of the fixed rod are welded to the base.

[0009] Preferably, the outer wall of the protective box is provided with an auxiliary mechanism, and the auxiliary mechanism includes a guide rope, a slider, a fixed column, a spring, a cleaning scraper, a limit seat, a dustproof screen and a pulley. The guide rope is connected to the rotating column, and a slider is fixedly connected to the side of the guide rope away from the rotating column. The top of the refrigeration air conditioner body close to the heat dissipation hole is docked with the limit seat.

[0010] Preferably, a fixing column is slidably connected inside the sliding block, and a spring is sleeved on the middle part of the outer wall of the fixing column.

[0011] Preferably, a cleaning scraper is connected to the bottom end of the outer wall of the sliding block.

[0012] Preferably, a dustproof mesh plate is slidably connected inside the limiting seat, and one side of the fixing column is connected to a pulley via a support plate.

[0013] Preferably, a limiting mechanism is arranged above the base, and the limiting mechanism comprises a fixed seat, an extension plate, a threaded rod, a clamping seat and a limiting plate, the fixed seat is connected to the base, and an extension plate is welded on the side of the top of the base away from the fixed seat.

[0014] Preferably, a threaded rod is connected to the inner thread of the top end of the extension plate, and a clamping seat is connected to one side of the outer wall of the threaded rod through a bearing seat, and a limiting plate is welded to the bottom end of the outer wall of the clamping seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are: when the refrigeration air-conditioning unit that is easy to defrost is used, the heat from the working of the compressor is used to defrost the evaporator, thereby reducing energy consumption, and the fixing effect between the base and the ground is increased by the support mechanism, and the support mechanism drives the auxiliary mechanism to work, thereby causing the cleaning scraper to rub against the dustproof mesh plate to clean it, preventing the dustproof mesh plate from being blocked and affecting the dustproof effect, and clamping and limiting the refrigeration air-conditioning machine body through the limiting mechanism, thereby preventing it from moving at will on the base, thereby facilitating stable limiting when the refrigeration air-conditioning unit is in use.

[0016] 1. In the process of maintaining the low temperature environment inside the cold storage by the refrigeration air-conditioning unit, the heat generated by the compressor when it is working is absorbed by the coolant, and then the heated coolant is introduced into the evaporator through the return pipe A and the input pipe B. At this time, the evaporator is defrosted by the heated coolant, so that the heat when the compressor is working can defrost the evaporator, reducing the energy consumption during defrosting; and starting the servo motor to drive the gear to rotate by rotating the column, and then the gear rotation drives the rack to move down until the fixed suction cup fits with the ground, thereby increasing the fixing effect between the base and the ground, improving the stability of the support of the main body of the refrigeration air-conditioning unit, and preventing the main body of the refrigeration air-conditioning unit from being fixed only by the universal wheel, resulting in poor support stability, so that when the refrigeration air-conditioning unit is used, it plays a role in energy-saving defrosting and stable support;

[0017] 2. In the process of maintaining the low temperature environment inside the cold storage by the refrigeration air-conditioning unit, the dust-proof mesh plate is used to prevent dust from entering the main body of the refrigeration air-conditioning unit through the heat dissipation holes; and when the rotating column rotates, the guide rope is rolled up, and then the guide rope is rolled up to drive the slider to move, so that the cleaning scraper moves and rubs against the dust-proof mesh plate, so that the dust blocked by the dust-proof mesh plate is cleaned, and the dust-proof mesh plate is prevented from being blocked by dust and affecting the dust-proof effect, and then the dust-proof mesh plate can be cleaned without removing it, so that it is easy to prevent dust and clean the dust-proof mesh plate when the refrigeration air-conditioning unit is used;

[0018] 3. In the process of maintaining the low temperature environment inside the cold storage by the refrigeration and air-conditioning unit, first rotate the threaded rod to drive the clamping seat to move. At this time, the distance between the clamping seat and the fixed seat is reduced until the clamping seat fits with the outer wall of the refrigeration and air-conditioning unit body, and then the refrigeration and air-conditioning unit body is clamped and limited, thereby preventing the refrigeration and air-conditioning unit body from moving at will on the base, thereby facilitating stable limiting when the refrigeration and air-conditioning unit is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention;

[0020] Figure 2 It is a top view of the three-dimensional structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional cutaway structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the support mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the rack of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the auxiliary mechanism of the present invention.

[0026] In the figure: 1. Refrigeration air conditioner body; 2. Base; 3. Universal wheel; 4. Compressor; 5. Condenser; 6. Expansion valve; 7. Evaporator; 8. Heat sink; 9. Input pipe A; 10. Liquid storage tank; 11. Input pipe B; 12. Return pipe A; 13. Return pipe B; 14. Support mechanism; 1401. Protection box; 1402. Servo motor; 1403. Rotating column; 1404. Gear; 1405. Rack; 1406. Guide To seat; 1407, fixed rod; 1408, fixed suction cup; 15, auxiliary mechanism; 1501, guide rope; 1502, slider; 1503, fixed column; 1504, spring; 1505, cleaning scraper; 1506, limit seat; 1507, dustproof screen; 1508, pulley; 16, limit mechanism; 1601, fixed seat; 1602, extension plate; 1603, threaded rod; 1604, clamping seat; 1605, limit plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 6The present invention provides a technical solution: a refrigeration and air conditioning unit convenient for defrosting, comprising a refrigeration and air conditioning unit body 1 and a base 2, the bottom end of the refrigeration and air conditioning unit body 1 is connected to the base 2, and universal wheels 3 are installed on both sides of the bottom end of the base 2, a compressor 4 is installed on one side of the inner wall of the refrigeration and air conditioning unit body 1, and the top of the compressor 4 is connected to a condenser 5 through an output pipeline, and one side of the outer wall of the condenser 5 is connected to an evaporator 7 through an expansion valve 6, a heat sink 8 is sleeved on the outer wall of the compressor 4, and the inside of the heat sink 8 is connected to an output pipe through a cooling cavity. Inlet pipe A9, and the side of the input pipe A9 away from the heat sink 8 is connected to the liquid storage tank 10, the side of the outer wall of the liquid storage tank 10 away from the input pipe A9 is connected to the input pipe B11, and the bottom side of the liquid storage tank 10 is connected to the return pipe A12, and the other side of the bottom of the liquid storage tank 10 is connected to the return pipe B13, a support mechanism 14 is provided on one side of the outer wall of the refrigeration air conditioner body 1, and the support mechanism 14 includes a protective box 1401, a servo motor 1402, a rotating column 1403, a gear 1404, a rack 1405, a guide seat 1406, a fixing rod 1407 and a fixing suction cup 1408, the protection box 1401 is connected to the base 2, and a rotating column 1403 is installed in the middle of the outer wall of the protection box 1401, a gear 1404 is connected to the output end of the rotating column 1403, and the gear 1404 is meshed with a rack 1405, and a heat dissipation hole is opened at the top of the outer wall of the refrigeration air conditioner body 1; one side of the outer wall of the return pipe B13 is connected to the evaporator 7, and one side of the outer wall of the return pipe A12 is connected to the heat dissipation seat 8; A guide seat 1406 is welded to the middle of the outer wall of the rack 1405, and a fixed rod 1407 is slidably connected inside the guide seat 1406; a fixed suction cup 1408 is connected to the bottom end of the outer wall of the rack 1405, and the upper and lower sides of the fixed rod 1407 are welded to the base 2; valves are installed on the outer walls of the input pipe A9, the input pipe B11, the return pipe A12 and the return pipe B13, the bottom ends of the evaporator 7 and the liquid storage tank 10 are connected to the inner wall of the refrigeration air conditioner body 1, and the bottom end of the heat sink 8 is connected to the refrigeration air conditioner body 1.

[0029] In specific implementation, in the process of maintaining the low temperature environment inside the cold storage by the refrigeration and air conditioning unit, after the compressor 4 generates heat during operation, the coolant in the liquid storage tank 10 is first introduced into the heat sink 8 through the input pipe A9. At this time, the heat generated by the compressor 4 during operation is absorbed by the coolant, and then the heat-absorbing and heated coolant is introduced into the liquid storage tank 10 through the return pipe A12, and then the heated coolant is introduced into the evaporator 7 through the input pipe B11. At this time, the evaporator 7 is defrosted by the heated coolant, and the temperature of the coolant after defrosting will decrease. Then, the low-temperature coolant is refluxed to the liquid storage tank 10 through the return pipe B13, and then the low-temperature coolant is introduced into the heat sink 8 through the input pipe A9, thereby absorbing the heat generated by the compressor 4 during operation. Then, while defrosting the evaporator 7, the heat generated by the compressor 4 during operation can also be absorbed for heat dissipation, thereby reducing energy consumption during defrosting.

[0030] After the refrigeration air conditioner body 1 is moved to the designated location by the universal wheel 3, the servo motor 1402 on the protection box 1401 is started. Since the output end of the servo motor 1402 is connected to the rotating column 1403, the servo motor 1402 is started to drive the rotating column 1403 to rotate, and then the rotating column 1403 rotates to drive the gear 1404 to rotate. Since the gear 1404 and the rack 1405 are meshed, the gear 1404 rotates to drive the rack 1405 to move downward. The downward movement of the rack 1405 drives the fixed suction cup 1408 to move downward. Since the rack 1405 is connected to the guide seat 1406, the guide seat 1406 slides along the fixed rod 1407 to guide the movement of the rack 1405.

[0031] Until the fixed suction cup 1408 is in contact with the ground, the fixing effect between the base 2 and the ground is increased, the stability of the support of the refrigeration and air-conditioning machine body 1 is improved, and the refrigeration and air-conditioning machine body 1 is prevented from being fixed only by the universal wheel 3, resulting in poor support stability. When the refrigeration and air-conditioning unit is in use, it plays a role in energy-saving defrosting and stable support.

[0032] See also Figure 1-Figure 4 , Figure 5 and Figure 7It can be seen that the outer wall of the protection box 1401 is provided with an auxiliary mechanism 15, and the auxiliary mechanism 15 includes a guide rope 1501, a slider 1502, a fixed column 1503, a spring 1504, a cleaning scraper 1505, a limit seat 1506, a dustproof screen 1507 and a pulley 1508. The guide rope 1501 is connected to the rotating column 1403, and the side of the guide rope 1501 away from the rotating column 1403 is fixedly connected with the slider 1502, and the side of the top of the refrigeration air conditioner body 1 close to the heat dissipation hole is connected to the limit seat 1506; the slider 1502 is slidably connected to the fixed column 15 03, and a spring 1504 is sleeved in the middle of the outer wall of the fixed column 1503; a cleaning scraper 1505 is connected to the bottom end of the outer wall of the slider 1502; a dustproof mesh plate 1507 is slidably connected inside the limiting seat 1506, and a pulley 1508 is connected to one side of the fixed column 1503 through a supporting plate; the pulley 1508 is connected to the guide rope 1501 inside, and an elastic telescopic mechanism is formed between the slider 1502, the fixed column 1503 and the spring 1504, the limiting seat 1506 and the dustproof mesh plate 1507 are snap-fitted, and the bottom end of the cleaning scraper 1505 is in contact with the dustproof mesh plate 1507.

[0033] In the specific implementation, in the process of maintaining the low temperature environment inside the cold storage by the refrigeration air conditioning unit, the dustproof mesh plate 1507 is moved into the limit seat 1506 in advance, and the heat dissipation hole is covered by the dustproof mesh plate 1507, thereby preventing dust from entering the refrigeration air conditioning unit body 1 through the heat dissipation hole, causing the dust inside the refrigeration air conditioning unit body 1 to accumulate quickly and affect the work;

[0034] Because the rotating column 1403 is connected to the guide rope 1501, the rotating column 1403 will reel in the guide rope 1501 when it rotates, and then the reeled guide rope 1501 drives the slider 1502 to move, and the movement of the slider 1502 drives the cleaning scraper 1505 to move together, and because the slider 1502 and the fixed column 1503 are in sliding connection, the movement of the slider 1502 is guided by the fixed column 1503, and the movement of the slider 1502 will squeeze the spring 1504, and then the spring 1504 will reset the auxiliary slider 1502 to its original position;

[0035] Then, when the servo motor 1402 starts to drive the rotating column 1403 to rotate, the rotating column 1403 will reel in the guide rope 1501, and at this time, the pulley 1508 will assist the movement of the guide rope 1501, so that the cleaning scraper 1505 moves and rubs against the dustproof mesh plate 1507, so that the dust blocked by the dustproof mesh plate 1507 is cleaned, and the dustproof mesh plate 1507 is prevented from being blocked by dust and affecting the dustproof effect. Then, the dustproof mesh plate 1507 can be cleaned without removing it, and the guide rope 1501 can also be manually pulled to drive the cleaning scraper 1505 to move, so that when the refrigeration air-conditioning unit is used, it is convenient to prevent dust and clean the dustproof mesh plate 1507.

[0036] See also Figure 1-Figure 4 It can be seen that a limiting mechanism 16 is arranged above the base 2, and the limiting mechanism 16 includes a fixed seat 1601, an extension plate 1602, a threaded rod 1603, a clamping seat 1604 and a limiting plate 1605. The fixed seat 1601 is connected to the base 2, and an extension plate 1602 is welded to the side of the top of the base 2 away from the fixed seat 1601; the threaded rod 1603 is connected to the internal thread of the top of the extension plate 1602, and the clamping seat 1604 is connected to one side of the outer wall of the threaded rod 1603 through a bearing seat, and the limiting plate 1605 is welded to the bottom end of the outer wall of the clamping seat 1604; the limiting plate 1605 and the extension plate 1602 are slidably connected, and the clamping seat 1604 and the base 2 are slidably connected, and the fixed seat 1601 and the clamping seat 1604 are both "C" shaped.

[0037] In the specific implementation, in the process of maintaining the low temperature environment inside the cold storage by the refrigeration and air conditioning unit, in order to prevent the refrigeration and air conditioning unit body 1 from moving randomly on the base 2, firstly fit one side of the bottom end of the refrigeration and air conditioning unit body 1 with the fixing seat 1601, and then rotate the threaded rod 1603 in the extension plate 1602, and the movement of the threaded rod 1603 drives the clamping seat 1604 to move. At this time, the distance between the clamping seat 1604 and the fixing seat 1601 is reduced. Because the clamping seat 1604 is connected to the limiting plate 1605, at this time The limiting plate 1605 slides along the extension plate 1602, thereby guiding the movement of the clamping seat 1604, so that the clamping seat 1604 can move stably until the clamping seat 1604 fits against the outer wall of the refrigeration air-conditioning machine body 1. At this time, the refrigeration air-conditioning machine body 1 is clamped and limited by the cooperation between the fixed seat 1601 and the clamping seat 1604, thereby preventing the refrigeration air-conditioning machine body 1 from moving at will on the base 2, thereby facilitating stable limiting when the refrigeration air-conditioning unit is in use.

[0038] In summary, when the refrigeration and air conditioning unit that is easy to defrost is used, the base 2 is first moved to a designated location by the universal wheels 3, and the compressor 4 inside the refrigeration and air conditioning unit body 1 is started. At this time, the compressor 4 compresses the refrigerant into a high-temperature and high-pressure gas, and then sends it to the condenser 5 for heat dissipation and cooling, and becomes a high-pressure liquid. Then, the high-pressure liquid is throttled and reduced in pressure by the expansion valve 6, and becomes a low-temperature and low-pressure gas-liquid mixture, and then enters the evaporator 7 to absorb the heat in the cold storage, thereby achieving the purpose of cooling. This is a prior art and will not be elaborated on here. By making the heat generated by the compressor 4 when it is working be The evaporator 7 is defrosted, thereby reducing the energy consumption during defrosting, and the fixing effect between the base 2 and the ground is increased by the support mechanism 14, thereby improving the stability of the support of the refrigeration air conditioner main body 1, and the support mechanism 14 will drive the auxiliary mechanism 15 to work, thereby causing the cleaning scraper 1505 to rub against the dustproof mesh plate 1507 to clean it, preventing the dustproof mesh plate 1507 from being blocked and affecting the dustproof effect, and the present solution has the characteristics of compact appearance, reasonable layout, easy use and maintenance, etc. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigeration and air conditioning unit that is easy to defrost, comprising a refrigeration and air conditioning unit body (1) and a base (2), characterized in that: The bottom end of the refrigeration air conditioner body (1) is connected to a base (2), and universal wheels (3) are installed on both sides of the bottom end of the base (2); a compressor (4) is installed on one side of the inner wall of the refrigeration air conditioner body (1), and the top end of the compressor (4) is connected to a condenser (5) via an output pipe, and the outer wall of the condenser (5) is connected to an evaporator (7) via an expansion valve (6); a heat sink (8) is sleeved on the outer wall of the compressor (4), and the inside of the heat sink (8) is connected to an input pipe A (9) via a cooling cavity, and the side of the input pipe A (9) away from the heat sink (8) is connected to a liquid storage tank (10), and the side of the outer wall of the liquid storage tank (10) away from the input pipe A (9) is connected to the liquid storage tank (10). The side of the refrigeration and air conditioning machine body (1) is connected to an input pipe B (11), and one side of the bottom end of the liquid storage tank (10) is connected to a return pipe A (12), and the other side of the bottom end of the liquid storage tank (10) is connected to a return pipe B (13). A support mechanism (14) is provided on one side of the outer wall of the refrigeration and air conditioning machine body (1), and the support mechanism (14) includes a protection box (1401), a servo motor (1402), a rotating column (1403), a gear (1404), a rack (1405), a guide seat (1406), a fixing rod (1407) and a fixing suction cup (1408). The protection box (1401) is connected to the base (2), and a rotating rod (1407) is installed in the middle of the outer wall of the protection box (1401). The rotating column (1403) is provided with a gear (1404) at the output end thereof, and the gear (1404) is meshingly connected with a rack (1405). A heat dissipation hole is provided at the top of the outer wall of the refrigeration air conditioner body (1). One side of the outer wall of the return pipe B (13) is connected to the evaporator (7). One side of the outer wall of the return pipe A (12) is connected to the heat dissipation seat (8). A guide seat (1406) is welded to the middle of the outer wall of the rack (1405), and a fixed rod (1407) is slidably connected inside the guide seat (1406). The bottom end of the outer wall of the rack (1405) is connected to a fixed suction cup (1408). The fixed rod (1407) The upper and lower sides are welded to the base (2); an auxiliary mechanism (15) is provided on the outer wall of the protection box (1401), and the auxiliary mechanism (15) includes a guide rope (1501), a slider (1502), a fixed column (1503), a spring (1504), a cleaning scraper (1505), a limit seat (1506), a dust screen (1507) and a pulley (1508); the guide rope (1501) is connected to the rotating column (1403), and the side of the guide rope (1501) away from the rotating column (1403) is fixedly connected to the slider (1502); the side of the top of the refrigeration air conditioner body (1) close to the heat dissipation hole is docked with the limit seat (1506).

2. A refrigeration and air conditioning unit convenient for defrosting according to claim 1, characterized in that: The sliding block (1502) is slidably connected to a fixing column (1503) inside, and a spring (1504) is sleeved on the middle part of the outer wall of the fixing column (1503).

3. A refrigeration and air conditioning unit convenient for defrosting according to claim 2, characterized in that: A cleaning scraper (1505) is butted against the bottom end of the outer wall of the sliding block (1502).

4. A refrigeration and air conditioning unit convenient for defrosting according to claim 3, characterized in that: A dustproof screen plate (1507) is slidably connected inside the limiting seat (1506), and a pulley (1508) is connected to one side of the fixing column (1503) via a support plate.

5. A refrigeration and air conditioning unit convenient for defrosting according to claim 4, characterized in that: A limiting mechanism (16) is arranged above the base (2), and the limiting mechanism (16) comprises a fixing seat (1601), an extension plate (1602), a threaded rod (1603), a clamping seat (1604) and a limiting plate (1605); the fixing seat (1601) is connected to the base (2); and the extension plate (1602) is welded to a side of the top end of the base (2) away from the fixing seat (1601).

6. A refrigeration and air conditioning unit convenient for defrosting according to claim 5, characterized in that: The top end of the extension plate (1602) is internally threadedly connected to a threaded rod (1603), one side of the outer wall of the threaded rod (1603) is connected to a clamping seat (1604) via a bearing seat, and a limiting plate (1605) is welded to the bottom end of the outer wall of the clamping seat (1604).

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