CN114152017A

CN114152017A - Defrosting device of refrigerated cabinet

Info

Publication number: CN114152017A
Application number: CN202111239269.1A
Authority: CN
Inventors: 吴建红; 杨文广
Original assignee: Zhejiang Xingbao Electric Appliance Co ltd
Current assignee: Zhejiang Xingbao Electric Appliance Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-03-08
Anticipated expiration: 2041-10-25
Also published as: CN114152017B

Abstract

The invention discloses a defrosting device of a refrigerated cabinet, which comprises a cabinet body, wherein a cavity is arranged in the cabinet body, a refrigerating box is arranged in the cavity, a refrigerating space is formed by the inner wall of the cabinet body and the outer wall of the refrigerating box, a condenser pipe is arranged in the refrigerating space, a packaging sleeve for expanding and crushing frost is arranged on the condenser pipe, a scraper plate is arranged outside the packaging sleeve, a Watt steam engine is arranged outside the cabinet body, an air outlet end of the Watt steam engine is provided with an air jet pipe, an air outlet end of the air jet pipe is provided with an air compression sleeve pipe, the air compression sleeve pipe is in an annular structure, an air outlet pipe is arranged on the air compression sleeve pipe, the air compression sleeve pipe is arranged in the refrigerating space, the defrosting device of the refrigerated cabinet melts the frost by utilizing the principle of heat release of air compression and utilizes generated air flow to provide power so as to drive a driving mechanism, the scraper plate scrapes the frost on the pipeline back and forth, and expands the packaging sleeve, the frost on the packaging sleeve is convenient to remove.

Description

Defrosting device of refrigerated cabinet

Technical Field

The invention relates to the technical field of refrigerated cabinets, in particular to a defrosting device of a refrigerated cabinet.

Background

A refrigerator is another name of a refrigerator and a freezer. All the evaporating pipes of the high-quality refrigerator adopt high-quality copper coil pipes and are processed into wide-surface special shapes. The surface of the stainless steel plate is smooth and clean, the thickness of the whole plate is uniform, and the proper thickness is adopted, so that the service life is long, and the appearance of the refrigerator is smooth and firm. The copper pipe has better cold transfer effect and better corrosion resistance than the aluminum pipe or the composite pipe, and the high-quality copper coil pipe has the advantages of high cleanliness in the pipe and few pipe joints, and can effectively prevent the faults of internal leakage or blockage of a refrigeration system. The circular tube is processed into a rectangle, so that the contact between the evaporating tube and the cold-transferring liner is changed from point contact into surface contact, the transfer area is enlarged, and the refrigerating speed can be accelerated.

The defrosting of the freezer of the household refrigerator can be carried out after the food in the freezer and the refrigerated cabinet is taken out, so that the quality of the food in the refrigerated cabinet is ensured to be a difficult problem, therefore, the defrosting of the freezer of the household refrigerator is quite troublesome, and the defrosting can be carried out after the food in the refrigerated cabinet is basically cleaned.

Chinese patent discloses a defrosting apparatus for a refrigerator freezer (No. CN103115469B), which promotes defrosting of a freezer by continuously transferring air from a refrigerator freezer to the freezer; on the contrary, along with the increase of the air pressure in the refrigerator freezer, the cold air in the refrigerator freezer is forced to return to the refrigerator freezer so as to keep the temperature of the refrigerator freezer, so that the energy is saved, the trouble is saved, and the labor is saved until the defrosting is finished. Accordingly, one skilled in the art provides a defrosting apparatus for a refrigerator to solve the problems set forth in the background art.

Disclosure of Invention

The present invention is directed to a defrosting device for a refrigerator, which solves the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a defrosting device of a refrigerated cabinet comprises a cabinet body, wherein a cavity is arranged in the cabinet body, a refrigerating box is arranged in the cavity, a refrigerating space is formed by the inner wall of the cabinet body and the outer wall of the refrigerating box, a condensing pipe is arranged inside the refrigerating space, a packaging sleeve for expanding and crushing frost is arranged on the condensing pipe, a scraping plate is arranged outside the packaging sleeve, a watt steam engine is arranged outside the cabinet body, an air outlet end of the watt steam engine is provided with an air ejector pipe, an air outlet end of the air ejector pipe is provided with an air compression sleeve, the air compression sleeve is of an annular structure, the air compression sleeve is provided with an air outlet pipe, the air compression sleeve is arranged in the refrigerating space, the air outlet pipe is provided with an air valve, the air outlet of the air outlet pipe is provided with an outlet of a three-way pipe, one outlet of the three-way pipe is provided with a high-pressure nozzle, and the air outlet end of the high-pressure nozzle is provided with a driving impeller, and the driving impeller is provided with a driving mechanism for driving the scraper.

As a further scheme of the invention: the driving mechanism comprises a gear arranged at the bottom of the central position of the driving impeller, a connecting rod is fixedly arranged at the bottom of the gear, one end of the connecting rod is connected with the central point of the gear, a protruding column is arranged at the other end of the connecting rod, a rack is arranged at the meshing side of the gear and is arranged in a sliding rail in a sliding manner, a limiting column is arranged at the bottom of the rack, a channel for the protruding column to pass through is arranged in the limiting column, the rack is fixedly connected with a scraper, an air valve is opened, under the continuous pressure relief of an air outlet pipe, the air in the air outlet pipe can enter the inside of a three-way pipe and is divided in the inside of the three-way pipe, part of the air flow is sprayed onto the impeller along a high-pressure nozzle and drives the impeller to rotate, the rotation of the impeller can drive the gear to rotate, at the moment, the rack connected with one side of the gear can slide in the sliding rail, and the circumference of the connecting rod rotates, can drive spacing post under the limiting displacement of protruding post, realize reciprocating motion to drive the friction that the scraper blade made a round trip on the condenser pipe, thereby be convenient for strike off the frost of remaining on the condenser pipe.

As a further scheme of the invention: the central axis of drive impeller coincides with the central axis of gear each other, and drive impeller has a plurality of groups to be curved flabellum combination and forms, and the end of giving vent to anger of high pressure nozzle perpendicular and the surface of flabellum, and the blowout gas that high pressure nozzle can last to stable drive impeller can effectually avoid the phenomenon that power is not enough to appear at the in-process of drive impeller, and continuously blows drive impeller, and the smoothness nature is good, can effectually play the effect of rewarming simultaneously.

As a further scheme of the invention: the rack slides in the slide rail through the rotation of gear and sets up, the gear is eccentric settings with protruding post, the rack can be dismantled with the scraper blade and set up, under the limiting displacement of protruding post, realizes reciprocating motion to driving the friction that the scraper blade made a round trip on the condenser pipe, thereby being convenient for strike off the frost of remaining on the condenser pipe, be convenient for moreover to the dismantlement of rack and scraper blade change.

As a further scheme of the invention: the scraper blade is including locating the external member of condenser pipe surface, the inside of external member is equipped with the through-hole that supplies the condenser pipe to pass, be equipped with the scraper on the inside wall of through-hole, the external member is equipped with a plurality of groups, and is equipped with the connecting block between the external member monomer, and the scraper blade is located the outside of condenser pipe, utilizes relative frictional force, gets rid of unnecessary frost on the condenser pipe.

As a further scheme of the invention: the inside of scraping the piece is equipped with both ends region and middle part region, the regional cross-sectional size in middle part is less than the regional area size in both ends, and has the regional cross-sectional dimension in both ends to evenly reduce to the regional cross-sectional dimension in middle part, the regional cross-sectional dimension in middle part is greater than the external diameter of condenser pipe, under the sliding action of scraping the piece, the pipeline can contact both ends region, because the region at both ends can slightly be greater than the middle part region, the frost that the condenser pipe struck off can be temporary piles up in both ends region, plays the effect of slip buffering, avoids scraping the piece card and dies on the condenser pipe.

As a further scheme of the invention: the utility model discloses a refrigerator, including the condenser pipe, the packing cover is including locating the outside air current gasbag of condenser pipe, be equipped with the intermediate layer in the air current gasbag, the intermediate layer is linked together with another export of three-way pipe, the outside of air current gasbag is equipped with the bolster, the outside fixed mounting of bolster has the refrigeration strip, and the air current of the injection of another export of three-way pipe can enter into interbedded inside, can make the air current gasbag take place the inflation, and the back is expanded to the air current gasbag, can make the bolster outwards expand, and the bolster after expanding can directly tear the frost that freezes outside the refrigeration strip, freezes the frost and tears the back, gets rid of the frost on refrigeration strip surface more easily, simultaneously under the effect of bolster, realizes the reset action to the refrigeration strip.

As a further scheme of the invention: the size of the air inlet of the interlayer is larger than that of the air outlet of the interlayer, so that air flow difference is formed in the interlayer conveniently, and the interlayer is communicated, so that the interlayer can perform quick inflation and has a good explosion-proof effect.

As a further scheme of the invention: the air current gasbag adopts explosion-proof material, the bolster is in the outside of air current gasbag equiangular setting, and the bolster is the one-to-one setting with the refrigeration strip, the refrigeration strip adopts the same material with the condenser pipe, and at refrigerator refrigeration in-process, the frost can be attached to the surface of refrigeration strip, and the air current gasbag adopts explosion-proof material, can be fine play the effect of protection.

As a further scheme of the invention: the refrigerating bar is characterized in that a gap exists between the refrigerating bars, a temperature conducting block is arranged in the gap, the refrigerating bars and the temperature conducting block are combined into a circular tubular structure, the temperature conducting block is made of copper metal, frost can form a whole body at the gap, the frost is prone to breaking at the gap along with expansion of the refrigerating bars, and the refrigerating effect of the condensing pipe is not affected by the arrangement of the temperature conducting block.

Compared with the prior art, the invention has the beneficial effects that:

1. under the effect of watt steam engine, pass through jet-propelled pipe compression to air compression sleeve pipe with the outside air, air compression sleeve pipe is cyclic annular setting, and be equipped with the effect of pneumatic valve, realize sealedly, along with the continuous pressure boost of the intraductal air of air compression sleeve, the air is when compressing, can release a large amount of heats, and the frost of adhering to on the condenser pipe can be directly melted to these heats, open the pneumatic valve, the intraductal air of air compression sleeve is rapid, air inflation can absorb heat, be convenient for absorb heat fast, thereby be convenient for reduce the refrigerator inside temperature to the room temperature fast, avoid the damage of high temperature to the condenser pipe.

2. Open the pneumatic valve, under the lasting pressure release of outlet duct, the inside of three-way pipe can be entered into to the gas in the outlet duct, and realize the reposition of redundant personnel in the inside of three-way pipe, wherein partly air current sprays to the impeller along high pressure nozzle, and drive the impeller and take place to rotate, the rotation of impeller can drive the gear and take place to rotate, the rack that one side of gear was connected this moment can slide in the slide rail, and the circumferential motion of connecting rod, can drive spacing post under the limiting displacement of protruding post, realize reciprocating motion, thereby drive the friction that the scraper blade made a round trip on the condenser pipe, thereby be convenient for strike off the frost of remaining on the condenser pipe.

3. The air current of the injection of another export of three-way pipe can enter into interbedded inside, can make the air current gasbag take place the inflation, and the inflation back of air current gasbag can make the bolster outwards expand, and the bolster after the expansion can directly tear the frost that freezes of refrigeration strip outside, freezes the frost and tears the back, gets rid of the surperficial frost of refrigeration strip more easily, simultaneously under the effect of bolster, realizes the reset action to refrigeration strip.

Drawings

Fig. 1 is a schematic view of a front view axis side structure of a defrosting apparatus for a refrigerator.

FIG. 2 is a schematic view of the structure of the condenser tube and the scraper blade connected to the main viewing axis in the defrosting device of the refrigerator.

Fig. 3 is a front view axis side view schematically showing a scraper in a defrosting apparatus for a refrigerator.

Fig. 4 is a sectional view of the interior of the scraper blade of the defrosting apparatus for a refrigerator.

Fig. 5 is a schematic view of a contracted front view axis side structure of a packing case in a defrosting apparatus for a refrigerator.

Fig. 6 is a schematic view of an inflatable major axis side structure of a packing case in a defrosting apparatus for a refrigerator.

In the figure: 1. a cabinet body; 2. a refrigeration case; 3. a refrigerated space; 4. a condenser tube; 5. packaging the sleeve; 501. an air flow balloon; 502. an interlayer; 503. a buffer member; 504. a refrigeration strip; 505. a temperature conducting block; 6. a watt steam engine; 7. a gas ejector tube; 8. an air compression sleeve; 9. an air outlet pipe; 10. an air valve; 11. a three-way pipe; 12. a high pressure spray head; 13. driving the impeller; 14. a drive mechanism; 1401. a gear; 1402. a rack; 1403. a slide rail; 1404. a limiting column; 1405. a channel; 1406. a connecting rod; 1407. a raised post; 15. a squeegee; 1501. a kit; 1502. a through hole; 1503. scraping the workpiece; 1504. and (4) connecting the blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, in the embodiment of the present invention, a defrosting device for a refrigerator includes a cabinet body 1, a cavity is disposed in the cabinet body 1, a refrigeration box 2 is disposed in the cavity, a refrigeration space 3 is formed by an inner wall of the cabinet body 1 and an outer wall of the refrigeration box 2, a condensation pipe 4 is disposed in the refrigeration space 3, a packing sleeve 5 for expanding and crushing frost is disposed on the condensation pipe 4, a scraping plate 15 is disposed outside the packing sleeve 5, a watt steam engine 6 is disposed outside the cabinet body 1, an air outlet end of the watt steam engine 6 is provided with an air jet pipe 7, an air outlet end of the air jet pipe 7 is provided with an air compression sleeve 8, the air compression sleeve 8 is in an annular structure, an air outlet pipe 9 is disposed on the air compression sleeve 8, the air compression sleeve 8 is disposed in the refrigeration space 3, an air valve 10 is disposed on the air outlet pipe 9, an outlet of the air outlet pipe 9 is provided with an outlet of a three-way pipe 11, an outlet of the three-way pipe 11 is provided with a high pressure nozzle 12, the air outlet end of the high-pressure nozzle 12 is provided with a driving impeller 13, and the driving impeller 13 is provided with a driving mechanism 14 for driving a scraper 15.

Under the effect of watt steam engine 6, compress to air compression sleeve pipe 8 through jet-propelled pipe 7 with the outside air, air compression sleeve pipe 8 is cyclic annular setting, and be equipped with pneumatic valve 10's effect, it is sealed to realize, along with the continuous pressure boost of the air in the air compression sleeve pipe 8, the air is when compressing, can release a large amount of heats, and the frost of adhering to on condenser pipe 4 that melts that these heats can be direct, open pneumatic valve 10, the air in the air compression sleeve pipe 8 is rapid, the air inflation can be endothermic, be convenient for absorb heat fast, thereby be convenient for reduce the inside temperature of refrigerator to the room temperature fast, avoid the high damage to condenser pipe 4 of temperature.

Referring to fig. 2-3, the driving mechanism 14 includes a gear 1401 disposed at the bottom of the central position of the driving impeller 13, a connecting rod 1406 is fixedly mounted at the bottom of the gear 1401, one end of the connecting rod 1406 is connected with the central point of the gear 1401, a protruding column 1407 is disposed at the other end of the connecting rod 1406, a rack 1402 is disposed at the meshing side of the gear 1401, the rack 1402 is slidably disposed in a sliding rail 1403, a limiting column 1404 is disposed at the bottom of the rack 1402, a channel 1405 for the protruding column 1407 to pass through is disposed inside the limiting column 1404, the rack 1402 is fixedly connected with the scraper 15, the gas valve 10 is opened, when the gas outlet pipe 9 is continuously discharged, gas in the gas outlet pipe 9 enters the inside of the three-way pipe 11 and is divided inside the three-way pipe 11, wherein a portion of the gas flow is sprayed onto the driving impeller 13 along the high pressure nozzle 12 and drives the driving impeller 13 to rotate, and the rotation of the driving impeller 13 drives the gear 1401 to rotate, at this moment, the rack 1402 connected to one side of the gear 1401 can slide in the slide rail 1403, and the circumferential rotation of the connecting rod 1406 can drive the limiting column 1404 to realize reciprocating motion under the limiting effect of the protruding column 1407, so that the scraping plate 15 is driven to rub back and forth on the condensation pipe 4, and frost remained on the condensation pipe 4 can be scraped conveniently. The central axis of drive impeller 13 and the central axis of gear 1401 coincide each other, and drive impeller 13 has a plurality of groups to be curved flabellum combination and forms, and the perpendicular and flabellum surface of the end of giving vent to anger of high pressure nozzle 12, high pressure nozzle 12 can be lasting blowout gas, thereby stable drive impeller 13, can effectually avoid appearing the phenomenon that power is not enough at the in-process of drive impeller 13, and continuously blow drive impeller 13, the smoothness is good, can effectually play the effect of rewarming simultaneously.

Rack 1402 slides in slide rail 1403 through the rotation of gear 1401 and sets up, gear 1401 is eccentric settings with protruding post 1407, and rack 1402 and scraper 15 can dismantle the setting, under protruding post 1407's limiting displacement, realize reciprocating motion to driving the friction that scraper 15 made a round trip on condenser pipe 4, thereby be convenient for scrape off the frost of remaining on condenser pipe 4, be convenient for moreover to rack 1402 and scraper 15's dismantlement change.

Referring to fig. 4, the scraper 15 includes a sleeve 1501 disposed on the outer surface of the condenser tube 4, a through hole 1502 for the condenser tube 4 to pass through is disposed inside the sleeve 1501, a plurality of sets of scrapers 1503 are disposed on the inner sidewall of the through hole 1502, and a plurality of connecting blocks 1504 are disposed between the single members of the sleeve 1501, and the scraper 15 is disposed outside the condenser tube 4 to remove the excess frost on the condenser tube 4 by using the relative friction force.

Scraper 1503's inside is equipped with both ends region and middle part region, middle part region cross-sectional size is less than both ends region area size, and there is the cross sectional dimension in both ends region evenly to reduce to the cross sectional dimension in middle part region, middle part region cross sectional area is greater than condenser pipe 4's external diameter, under scraper 1503's sliding action, the pipeline can contact both ends region, because the region at both ends can slightly be greater than middle part region, the frost that condenser pipe 4 scraped can be temporary piles up in both ends region, play the effect of sliding buffer, avoid scraper 1503 card to die on condenser pipe 4.

Referring to fig. 5-6, the packaging sleeve 5 includes an airflow airbag 501 disposed outside the condensation tube 4, an interlayer 502 is disposed in the airflow airbag 501, the interlayer 502 is communicated with another outlet of the three-way pipe 11, a buffer member 503 is disposed outside the airflow airbag 501, a refrigeration strip 504 is fixedly mounted outside the buffer member 503, airflow jetted from another outlet of the three-way pipe 11 enters the interlayer 502, the airflow airbag 501 expands, the buffer member 503 expands outwards after the airflow airbag 501 expands, the expanded buffer member 503 can directly tear frost outside the refrigeration strip 504, and after the frost is torn, the frost on the surface of the refrigeration strip 504 can be removed more easily, and meanwhile, the refrigeration strip 504 can be reset under the action of the buffer member 503.

The size of the air inlet of the interlayer 502 is larger than that of the air outlet of the interlayer, so that air flow difference is formed in the interlayer 502 conveniently, and the interlayer 502 is communicated, so that the interlayer has a good explosion-proof effect while quick inflation is realized.

Airflow airbag 501 is made of explosion-proof materials, buffering pieces 503 are arranged at equal angles outside airflow airbag 501, buffering pieces 503 and refrigerating strips 504 are arranged in a one-to-one correspondence mode, refrigerating strips 504 and condensing tubes 4 are made of the same materials, frost can be attached to the outer surfaces of refrigerating strips 504 in the refrigerating process of the refrigerator, and airflow airbag 501 is made of explosion-proof materials and can well play a role in protection.

Gaps exist among the plurality of groups of refrigerating strips 504, a temperature conduction block 505 is arranged in the gaps, the refrigerating strips 504 and the temperature conduction block 505 are combined into a circular tubular structure, the temperature conduction block 505 is made of copper, frost can form a whole body at the gaps, the frost is prone to breaking at the gaps along with expansion of the refrigerating strips 504, and the refrigerating effect of the condensing tube 4 is not affected by the arrangement of the temperature conduction block 505.

During the use, the user at first closes the external power supply of this refrigerator, and open watt steam engine 6's power, under watt steam engine 6's effect, compress external air to air compression sleeve pipe 8 through jet-propelled pipe 7, air compression sleeve pipe 8 is cyclic annular setting, and be equipped with the effect of pneumatic valve 10, the realization is sealed, along with the continuous pressure boost of the air in the air compression sleeve pipe 8, the air is when compressing, can release a large amount of heats, and the frost of attached to condenser pipe 4 of melting that these heats can be direct, open pneumatic valve 10, the air in the air compression sleeve pipe 8 is rapid, air expansion can absorb heat, be convenient for absorb heat fast, thereby be convenient for reduce the inside temperature of refrigerator to the room temperature fast, avoid the damage of high temperature to condenser pipe 4.

The air valve 10 is opened, under the continuous pressure relief of the air outlet pipe 9, the air in the air outlet pipe 9 can enter the inside of the three-way pipe 11, and the flow division is realized in the inside of the three-way pipe 11, a part of the air flow is sprayed onto the driving impeller 13 along the high-pressure spray head 12, and the driving impeller 13 is driven to rotate, the rotation of the driving impeller 13 can drive the gear 1401 to rotate, the rack 1402 connected to one side of the gear 1401 can slide in the slide rail 1403, the circumferential rotation of the connecting rod 1406 can drive the limit column 1404 to realize reciprocating motion under the limit action of the protruding column 1407, so that the scraping plate 15 is driven to rub on the condensation pipe 4 back and forth, and the frost on the condensation pipe 4 can be scraped conveniently.

The air current of the injection of another export of three-way pipe 11 can enter into the inside of intermediate layer 502, can make air current gasbag 501 take place the inflation, and air current gasbag 501 inflation back can make bolster 503 outwards expand, and the bolster 503 after the expansion can directly tear the frost that freezes outside refrigeration strip 504, freezes the frost and tears the back, gets rid of the frost on refrigeration strip 504 surface more easily, simultaneously under bolster 503's effect, realizes the reset effect to refrigeration strip 504.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a defroster of freezer, its characterized in that, includes the cabinet body (1), be equipped with the cavity in the cabinet body (1), be equipped with refrigeration case (2) in the cavity, the refrigeration space (3) of the inner wall of the cabinet body (1) and the outer wall formation of refrigeration case (2), the inside in refrigeration space (3) is equipped with condenser pipe (4), be equipped with packing cover (5) that are used for the broken frost of inflation on condenser pipe (4), the outside of packing cover (5) is equipped with scraper blade (15), the outside of the cabinet body (1) is equipped with watt steam engine (6), the end of giving vent to anger of watt steam engine (6) is equipped with jet-propelled pipe (7), the end of giving vent to anger of jet-propelled pipe (7) is equipped with air compression sleeve pipe (8), air compression sleeve pipe (8) are the loop configuration, be equipped with outlet duct (9) on air compression sleeve pipe (8), air compression sleeve pipe (8) are located in refrigeration space (3), the automatic scraper blade cleaning device is characterized in that an air valve (10) is arranged on the air outlet pipe (9), an outlet of the three-way pipe (11) is arranged at an air outlet of the air outlet pipe (9), a high-pressure spray head (12) is arranged at an outlet of the three-way pipe (11), a driving impeller (13) is arranged at an air outlet end of the high-pressure spray head (12), and a driving mechanism (14) for driving the scraper blade (15) is arranged on the driving impeller (13).

2. The defrosting device of a refrigerating cabinet according to claim 1, wherein the driving mechanism (14) comprises a gear (1401) arranged at the bottom of the central position of the driving impeller (13), a connecting rod (1406) is fixedly installed at the bottom of the gear (1401), one end of the connecting rod (1406) is connected with the central point of the gear (1401), a protruding column (1407) is arranged at the other end of the connecting rod (1406), a rack (1402) is arranged at the meshing side of the gear (1401), the rack (1402) is slidably arranged in the sliding rail (1403), a limiting column (1404) is arranged at the bottom of the rack (1402), a channel (1405) for the protruding column (1407) to pass through is arranged inside the limiting column (1404), and the rack (1402) is fixedly connected with the scraper (15).

3. The refrigerator defroster according to claim 2, wherein a central axis of the driving impeller (13) and a central axis of the gear (1401) are coincident with each other, the driving impeller (13) is formed by combining a plurality of sets of arc-shaped blades, and an air outlet end of the high pressure nozzle (12) is perpendicular to surfaces of the blades.

4. The refrigerator defrost device as in claim 2 wherein said rack (1402) is slidably disposed in said track (1403) by rotation of said gear (1401), said gear (1401) and said protrusion (1407) are eccentrically disposed, said rack (1402) and said scraper (15) are detachably disposed.

5. The defrosting device of a refrigerator according to claim 1, wherein the scraping plate (15) comprises a sleeve member (1501) arranged on the outer surface of the condensation duct (4), the sleeve member (1501) is internally provided with a through hole (1502) for the condensation duct (4) to pass through, the inner side wall of the through hole (1502) is provided with a scraping member (1503), the sleeve member (1501) is provided with a plurality of groups, and a connecting block (1504) is arranged between the single sleeve member (1501).

6. The refrigerator defroster of claim 5, wherein the inside of the scraper (1503) is provided with two end regions and a middle region, the middle region has a cross-sectional size smaller than the area size of the two end regions, and the cross-sectional size of the two end regions is uniformly reduced to the cross-sectional size of the middle region, and the cross-sectional area of the middle region is larger than the outer diameter of the condensation duct (4).

7. The defrosting device of a refrigerated cabinet according to claim 1, wherein the packaging sleeve (5) comprises an air flow air bag (501) arranged outside the condensation pipe (4), an interlayer (502) is arranged in the air flow air bag (501), the interlayer (502) is communicated with the other outlet of the three-way pipe (11), a buffer member (503) is arranged outside the air flow air bag (501), and a refrigerating strip (504) is fixedly arranged outside the buffer member (503).

8. Defrost device for a refrigerated cabinet according to claim 7 wherein the air inlet of the compartment (502) is larger in size than the air outlet thereof.

9. The defrosting device of a refrigerating cabinet according to claim 7, wherein the air flow airbag (501) is made of explosion-proof material, the buffering members (503) are arranged at equal angles outside the air flow airbag (501), the buffering members (503) and the refrigerating strips (504) are arranged in a one-to-one correspondence manner, and the refrigerating strips (504) and the condensing pipes (4) are made of the same material.

10. The defrosting device of a refrigerating cabinet according to claim 7, wherein gaps exist among a plurality of groups of the refrigerating strips (504), a temperature conducting block (505) is arranged in the gaps, the refrigerating strips (504) and the temperature conducting block (505) are combined into a round tubular structure, and the temperature conducting block (505) is made of copper.