CN116817499A

CN116817499A - Refrigerating system

Info

Publication number: CN116817499A
Application number: CN202310965269.2A
Authority: CN
Inventors: 冯孟丽; 何大洋; 齐方成; 洪武辉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2023-09-29

Abstract

The invention discloses a refrigeration system, comprising: the inner side of the cold wall is positioned in the circulating air duct of the refrigerating system; the part of the secondary refrigerant pipeline of the secondary refrigerant circulating system, which is embedded in the cold wall, supplies cold for the wall; the evaporator coil is embedded in the cold wall and is wound on the refrigerating medium pipeline for cooling; and the defrosting device is used for removing the frost layer on the inner side of the cold wall. According to the invention, the secondary refrigerant pipeline and the evaporator coil are embedded in the cold wall, and the defrosting device is arranged on the inner side wall of the cold wall to automatically remove the frost layer on the surface of the cold wall, so that the defrosting can be realized without stopping the machine under the condition that the refrigerating effect of the quick-freezing warehouse is unchanged, the daily capacity of the quick-freezing machine is improved, and the energy consumption of re-warming and temperature pulling after defrosting is saved.

Description

Refrigerating system

Technical Field

The invention relates to the technical field of refrigeration, in particular to a refrigeration system.

Background

Most spiral instant freezers on the market use evaporative heat exchangers. However, this presents a series of problems, since the evaporator is prone to frost after a long period of operation. First, frosting affects the heat exchange performance of the evaporator, resulting in a decrease in the quick-freezing rate. Second, frosting also increases the operational burden of the compressor, resulting in an increase in energy consumption. In order to solve the problem of frosting, the spiral instant freezer is usually stopped for defrosting every 6-7 hours continuously. However, since the instant freezer is a large-sized freezer, the defrosting time period is at least 1 hour. Defrosting is required 2-3 times per day. In addition, in order to ensure that the goods in the quick freezer are frozen when the machine unit is stopped, feeding is stopped about 0.5 hour before defrosting. The entire defrosting process is time consuming and energy consuming. After defrosting, the temperature of the warehouse will rise, and the temperature of the warehouse needs to be reduced to below-30 ℃ again, and then feeding is performed, which increases energy consumption and time cost.

Disclosure of Invention

The invention provides a refrigerating system for solving the technical problem that a spiral quick-freezing refrigerating system in the prior art cannot continuously defrost.

The technical scheme adopted by the invention is as follows:

the invention proposes a refrigeration system comprising:

the circulating air duct of the refrigerating system passes through the inner side of the cold wall;

the secondary refrigerant circulating system is characterized in that a secondary refrigerant pipeline is embedded in a cold wall to cool the wall;

the evaporator coil is embedded in the cold wall and is wound on the refrigerating medium pipeline for cooling;

and the defrosting device is used for removing the frost layer on the inner side of the cold wall.

The invention further comprises an image acquisition device for acquiring the image information of the inner side of the cold wall, and a controller for calculating the ratio of the frosting area according to the image information and controlling the defrosting device to remove the frosting layer of the inner side of the cold wall according to the comparison result of the ratio of the frosting area and the preset ratio of the frosting area.

The image acquisition device acquires image information of the inner side of the cold wall once every preset time, the controller randomly selects preset number of pixel points, and the proportion of the white pixel points to the preset number of pixel points is calculated to obtain the proportion of the frosting area.

Preferably, the inner side of the cold wall is divided into a plurality of frost detection areas up and down, and when the ratio of the frost formation area of any frost detection area is larger than the preset ratio of the frost formation area, the controller controls the defrosting device to remove the frost layer on the inner side of the cold wall.

Further, the defrosting device includes: and the defrosting shoveling assembly is arranged on the defrosting layer on the inner side of the cold wall and drives the defrosting shoveling assembly to move the driving piece for shoveling the defrosting layer.

Further, the frost shoveling assembly includes: and the frost spade piece is tightly attached to the cold wall and is transversely provided with a frost accumulation groove, and a frost pushing slider which is arranged in the frost accumulation groove and pushes out a frost layer in the frost accumulation groove is arranged in the frost accumulation groove.

Further, the frost spade piece is long-strip-shaped, the frost accumulation grooves leading to two ends are formed in the length direction, the frost spade piece encloses one side of the wall of the frost accumulation groove, and an inclined plane is arranged at the top to form a frost spade part.

Further, the refrigerant cycle system includes: a compressor, a condenser, a throttle valve and the evaporator coil in cyclical communication.

The coolant circulation system includes: the secondary refrigerant pipeline is arranged on the circulating air duct and used for reducing the temperature of the air duct, a secondary refrigerant liquid storage tank for collecting secondary refrigerant of the secondary refrigerant spray recovery device is arranged, and the secondary refrigerant of the secondary refrigerant liquid storage tank is sent to a secondary refrigerant pump of the secondary refrigerant spray recovery device through the secondary refrigerant pipeline.

The liquid inlet part of the secondary refrigerant pipeline and the evaporator coil are arranged in the inner side surface of the cold wall in a serpentine shape.

The invention further comprises a spiral tower arranged on the circulating air duct and used for cooling cargoes.

Specifically, the inner side of the cold wall is the inner wall of one side of a quick-freezing warehouse provided with the refrigerating system, the spiral tower is arranged in the quick-freezing warehouse, and the air in the circulating air duct is blown to the cold wall through the spiral tower and then returned to the spiral tower after being blown to the secondary refrigerant spraying and recycling device of the secondary refrigerant circulating system through the circulating fan.

Compared with the prior art, the invention has the following advantages:

through pre-burying secondary refrigerant pipeline and evaporator coil in the cold wall to through setting up defroster in the inside wall of cold wall and automatically removing the frost layer on cold wall surface, can guarantee to trade under the unchangeable circumstances of refrigeration effect in the quick-freeze storehouse and realize not shutting down defrosting, improve frozen machine daily capacity, practice thrift the energy consumption that heavy temperature draws the temperature after the defrosting. Through the combination of the cold wall and the secondary refrigerant circulation system, the quick refrigeration of the air in the quick-freezing warehouse is realized, and thus the quick-freezing efficiency is improved.

And calculating the area ratio covered by the cold wall frost layer by randomly counting the proportion of white pixel points on the cold wall, judging the frosting degree of the cold wall, and realizing automatic defrosting.

Before the circulating air enters the spray heat exchanger, the cold wall is used for dehumidifying the air, so that the dilution effect of water vapor in the air on the coolant solution is reduced, and the risks of icing and freezing pipes of a spray system are avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a structure in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a cold wall arrangement pipeline according to an embodiment of the present invention;

FIG. 3 is a schematic view of a portion of a defrosting apparatus according to an embodiment of the invention;

FIG. 4 is a control flow diagram of an embodiment of the present invention;

FIG. 5 is a control block diagram in an embodiment of the invention;

101. a condenser; 102. a compressor; 103. a throttle valve; 104. a coolant pump; 105. a defrosting device; 106. an image acquisition device; 107. a spiral tower; 108. an air return port; 109. a circulating fan; 110. a coolant spray device; 111. a recovery tray; 112. a liquid baffle; 113. a coolant reservoir; 114. a cold wall; 115. a coolant conduit; 116. an evaporator coil.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The principles and structures of the present invention are described in detail below with reference to the drawings and the examples.

As the instant freezer is large-scale refrigeration equipment, the defrosting time is at least 1 hour. Defrosting is required 2-3 times per day. In addition, in order to ensure that the goods in the quick freezer are frozen when the machine unit is stopped, feeding is stopped about 0.5 hour before defrosting. The entire defrosting process is time consuming and energy consuming. After defrosting, the temperature of the warehouse will rise, and the temperature of the warehouse needs to be reduced to below-30 ℃ again, and then feeding is performed, which increases energy consumption and time cost. In this regard, the invention provides a continuous quick-freezing refrigerating system capable of realizing non-stop defrosting, which is characterized in that a refrigerating medium pipeline and an evaporator coil are embedded in a cold wall, and frost layers on the inner side of the wall are removed periodically through a defrosting device.

As shown in fig. 1 and 2, the present invention proposes a refrigeration system, which specifically includes: the quick-freezing warehouse, the cold wall 114, the secondary refrigerant circulation system, the refrigeration circulation system and the defroster 105, one side wall of the quick-freezing warehouse is the cold wall 114, and the quick-freezing warehouse is provided with a circulating air duct, and the circulating air duct passes through the cold wall 114. The refrigeration cycle system specifically includes a condenser 101, a throttle valve 103, a compressor 102, and an evaporator coil, wherein the evaporator pipe can provide cold energy, and the evaporator coil is embedded in a cold wall 114 for cooling. The coolant circulation system includes coolant pipes embedded in the cold wall 114 and wound around the evaporator coil, coolant reservoir 113, and coolant spray recovery apparatus. The evaporator coil 116 and the secondary refrigerant pipeline 115 are both embedded in the defrosting cold wall 114, the area of the evaporator coil 116 flowing through the cold wall 114 is smaller, and the evaporator coil is only used for exchanging heat with the secondary refrigerant pipeline of a winding part, the secondary refrigerant pipeline 115 is paved with the whole cold wall 114, so that the surface temperature of the cold wall 114 is reduced in the flowing process of the secondary refrigerant, circulating air in a warehouse passes through a circulating air channel to be frosted on the cold wall 114, and defrosting can be performed through the defrosting device 105 at the bottom of the cold wall 114. Therefore, the defrosting can be realized without stopping in the quick-freezing warehouse under the condition of ensuring the heat exchange effect in the warehouse to be unchanged, the daily capacity of the quick-freezing machine is improved, and the energy consumption of heavy temperature and temperature pulling after defrosting is saved. And by combining the cold wall 114 and the secondary refrigerant circulation system, the quick refrigeration of the air in the quick-freezing warehouse is realized, so that the quick-freezing efficiency is improved.

It should be noted that, the pre-buried and wall body direct contact of above-mentioned pipeline does not have the clearance. So that the cold energy can be smoothly transferred.

Specifically, as shown in fig. 1, 4 and 5, the present invention further includes an image acquisition device 106 and a controller, where the image acquisition device 106 acquires image information of the inner side of the cold wall 114, and the controller can calculate a rough frosting area, and then control the defrosting device 105 to remove the frost layer of the inner side of the cold wall 114 according to a comparison result of the frosting area and a preset frosting area. I.e., the frosting area is greater than the preset frosting area, a defrosting program is entered, and the controller directly controls the defrosting device 105 to remove the frost layer on the inner side of the cold wall 114.

And when the defrosting program controller is started to directly control the defrosting device to work, the image acquisition device stops shooting, and because the wall surface can be blocked in the working process of the defrosting device, the shot image information cannot be used as a judgment basis.

The specific acquisition mode of the ratio of the frosting area is as follows: the image acquisition device 106 acquires image information of the inner side of the cold wall 114 once every preset time, and after receiving the image information, the controller randomly selects a preset number of pixels, calculates the proportion of white pixels to the preset number of pixels, and takes the proportion as the proportion of frosting area. For the controller to control the defrost device 105.

The image acquisition device 106 can acquire the image information of the inner side of the cold wall 114 once every 2min, and after the controller receives the image information, the controller randomly selects a preset number of pixels, calculates the proportion of the white pixels to the preset number of pixels, and takes the proportion as the proportion of the frosting area. For the controller to control the defrost device 105.

Further, the inside of the cold wall 114 is divided into a plurality of frost detecting areas up and down, and when the ratio of the frost forming area of any one of the frost detecting areas is larger than the ratio of the preset frost forming area, the controller directly controls the defrosting device 105 to remove the frost layer on the inside of the cold wall 114. The phenomenon that the defrosting device cannot be triggered to defrost due to overlarge frosting quantity in a certain area is avoided.

Specifically, as shown in fig. 2, the inner side surface of the cold wall 114 may be equally divided into an upper frost detecting area a and a lower frost detecting area b, when the ratio of the frost area of the frost detecting area a located above is greater than the preset ratio of the frost area or when the ratio of the frost area of the frost detecting area b located below is greater than the preset ratio of the frost area, the defrosting device 105 directly shovels frost upward from the bottom of the cold wall 114 to the top of the cold wall 114, and clears the two frost detecting areas once, and detects through the sub-areas, thereby avoiding that the frost in a certain area is serious and affects the whole refrigeration condition.

It should be noted that, the terms "a", "b" and the like are used to define the area region, and are merely for convenience of distinguishing the corresponding regions, and the terms have no special meaning unless otherwise stated, so they should not be construed as limiting the scope of the present invention.

In a specific embodiment, the defrosting device 105 includes: a frost scooping assembly mounted on the inside of the cold wall 114 for scooping the defrost layer, a driving member for driving the frost scooping member to move the defrost layer. The frost-shoveling part of the frost-shoveling assembly is close to the inner side of the cold wall 114, and can shoveling the frost layer on the inner wall of the cold wall 114 by pushing upwards against the inner side of the cold wall 114, so that the defrosting effect is achieved. The driving piece can specifically adopt the form of vertical lead screw cover slider, rotates through motor drive lead screw, slider and lead screw threaded connection, simultaneously with the one end fixed connection of shovel cream subassembly, rotate vertical lead screw and can drive the slider up-and-down motion to drive shovel cream subassembly upward movement and shovel cream and downward movement return.

Further, as shown in fig. 3, the frost shovel assembly includes: the frost spade piece is long and wide with the wall with pushing away the frost slider 1052, transversely set up along cold wall 114 to paste tight cold wall 114, the frost spade piece is equipped with long-pending cream groove 1053 along length direction, long-pending cream groove 1053 opening up and with the both ends face intercommunication of frost spade piece, one side top that the frost spade piece encloses into long-pending cream groove cell wall sets up the inclined plane and forms the frost spade portion 1051 that has the pointed end, the lateral surface of frost spade portion 1051 pastes tight inside wall of cold wall 114, the medial surface of frost spade portion 1051 is long-pending cream groove 1053, makes the frost layer that the frost spade portion was shoveled can directly drop to long-pending cream inslot. The pushing block 1052 is arranged at one end in the frost accumulation groove, and can be pushed from one end to the other end of the frost accumulation groove, so that the frost layer collected in the frost accumulation groove is pushed out of the frost accumulation groove, a specific driving device of the pushing block can also adopt a form of a screw rod, a driving motor and a block, and the vertical driving mode is common in the prior art and is not specifically repeated.

When the system is used for defrosting, the defrosting device moves from bottom to top, then returns to the bottom of the cold wall, frost falls into the frost accumulation groove, the frost pushing sliding block moves from one side to the other side, the frost is pushed out of the warehouse through the defrosting outlet, and the frost pushing sliding block returns to the original position, so that one-time automatic defrosting is completed.

Specifically, the refrigerant cycle system includes: a compressor 102, a condenser 101, a throttle valve 103 and an evaporator coil in cyclical communication. The compressor 102 and the condenser 101 are arranged outside the quick-freezing warehouse, the evaporator coil is spiral, and the evaporator coil is embedded in the cold wall 114 to provide cold for the secondary refrigerant pipeline and part of the wall surface of the cold wall 114. The outside of the cold wall 114 is provided with a barrier to prevent the outward loss of cold energy, so that the cold energy is only transferred from the inside of the cold wall 114 to the inside of the cold wall 114.

The coolant circulation system includes: the secondary refrigerant pipeline is arranged on the circulating air duct and used for reducing the temperature of the air duct, the secondary refrigerant liquid storage tank 113 is used for collecting secondary refrigerant of the secondary refrigerant spray recovery device, and the secondary refrigerant of the secondary refrigerant liquid storage tank 113 is sent to the secondary refrigerant pump 104 of the secondary refrigerant spray recovery device through the secondary refrigerant pipeline. The coolant pipes are arranged in a serpentine shape in the whole cold wall 114, the inlet sections of the coolant pipes are wound with the evaporator coil, the cold energy of the evaporator coil is absorbed, and the surface temperature of the cold wall 114 is reduced in the flowing process of the coolant. The secondary refrigerant liquid storage tank 113 is arranged below the secondary refrigerant pipeline, and the secondary refrigerant pump 104 is arranged on a connecting pipeline between the secondary refrigerant liquid storage tank 113 and the secondary refrigerant pipeline and is used for conveying secondary refrigerant in the secondary refrigerant liquid storage tank 113 to the secondary refrigerant pipeline. The secondary refrigerant spray recovery device is arranged at the top of the quick-freezing warehouse and is positioned on the circulating air duct and used for cooling circulating air on the circulating air duct, and meanwhile, the secondary refrigerant spray recovery device is connected with the secondary refrigerant liquid storage tank 113 through a recovery pipeline and used for recovering the secondary refrigerant subjected to spray heat exchange to the secondary refrigerant liquid storage tank 113.

The inner wall of one side of the quick-freezing warehouse is a cold wall 114, a spiral tower 107 for cooling goods is arranged in the quick-freezing room, and air in the circulation air channel is blown to the cold wall 114 through the spiral tower 107, and then is blown to a secondary refrigerant spraying and recycling device of a secondary refrigerant circulating system through a circulating fan 109 at the top and returns to the spiral tower 107 to complete circulation. Before the circulating air enters the spray heat exchanger, the cold wall is used for dehumidifying the air, so that the dilution effect of water vapor in the air on the coolant solution is reduced, and the risks of icing and freezing pipes of a spray system are avoided.

Specifically, the image acquisition device 106 is disposed at one side of the spiral tower 107, and the shooting direction of the image acquisition device is opposite to the inner side surface of the cold wall, so that the image information of the cold wall can be directly acquired.

The top in quick-freeze storehouse separates a return air wind channel through setting up with top surface spaced baffle, for the part in circulation wind channel, and secondary refrigerant sprays recovery unit and circulating fan 109 all installs in this return air wind channel, and wherein secondary refrigerant sprays recovery unit specifically includes: the secondary refrigerant spraying device 110, retrieve tray 111 and keep off liquid board 112, the secondary refrigerant spraying device 110 sets up the top surface in quick-freeze storehouse, retrieve the tray 111 and be located the baffle under the secondary refrigerant spraying device 110, be the return air wind channel between secondary refrigerant spraying device 110 and the recovery tray 111, keep off the liquid board 112 and keep off the air-out side at secondary refrigerant spraying device 110 and recovery tray 111, secondary refrigerant spraying device 110 sprays the refinement, fall into in the recovery tray 111 after carrying out the repeated heat transfer with the air that flows through the recovery wind channel, then get back to secondary refrigerant liquid tank 113 through the recovery pipeline, simultaneously keep off the liquid board 112 and can keep off the secondary refrigerant and avoid the secondary refrigerant directly to flow out the return air wind channel along the air, keep off the liquid board 112 and specifically can set up the polylith from top to bottom interval and slope ascending baffle, make the secondary refrigerant blown onto keep off the liquid board 112 to flow back down along keeping off in the liquid board 112 to retrieve tray 111. And enters the next secondary refrigerant circulation.

The refrigerating fluid circulation system comprises a condenser, a throttle valve, a compressor and an evaporator coil, wherein the refrigerating fluid circulation system comprises a refrigerating fluid pipeline and a refrigerating fluid liquid storage tank which are wound with the evaporator coil, and a refrigerating fluid spraying and recycling device. The evaporator coil and the secondary refrigerant pipeline are pre-buried in the defrosting cold wall, the area of the evaporator coil flowing through the cold wall is smaller, the evaporator coil is only used for exchanging heat with the secondary refrigerant pipeline of a winding part, the whole cold wall is paved by the secondary refrigerant pipeline, the surface temperature of the cold wall is reduced in the flowing process of the secondary refrigerant, the circulating air in the warehouse frosts on the cold wall, the purposes of intelligent identification and continuous defrosting are achieved through an automatic defrosting/ice shoveling device at the bottom of the cold wall and a control method, the secondary refrigerant passes through the cold wall to reach a spraying device above the cold warehouse, the temperature of circulating air in the warehouse is reduced by spraying through a spray nozzle, the circulating air falls into a secondary refrigerant recovery tray, is recovered to a secondary refrigerant liquid storage tank through the pipeline, and the secondary refrigerant is circulated next time. The system is applied to a quick-freezing warehouse, can realize defrosting without stopping under the condition of ensuring the heat exchange effect in the warehouse to be unchanged, improves the daily capacity of the quick-freezing machine, and saves the energy consumption of heavy temperature pulling after defrosting.

It is noted that the above-mentioned terms are used merely to describe specific embodiments, and are not intended to limit exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigeration system, comprising:

the inner side of the cold wall is positioned in the circulating air duct of the refrigerating system;

the evaporator coil of the refrigeration cycle system is embedded in the cold wall and is wound with the secondary refrigerant pipeline;

2. The refrigeration system of claim 1, further comprising an image acquisition device for acquiring image information of the inner side of the cold wall, and a controller for calculating a ratio of frosting area based on the image information and controlling the defrosting device to remove the frost layer of the inner side of the cold wall based on a comparison result of the ratio of frosting area and a preset ratio of frosting area.

3. The refrigeration system of claim 2, wherein the image acquisition device acquires image information of the inner side of the cold wall once every preset time interval, the controller randomly selects a preset number of pixels, and the ratio of white pixels to the preset number of pixels is calculated to obtain the ratio of frosting area.

4. The refrigeration system according to claim 2, wherein the inside of the cold wall is divided up and down into a plurality of frost detection areas, and the controller controls the defrosting means to remove the frost layer on the inside of the cold wall when the ratio of the frost formation area of any of the frost detection areas is greater than a preset ratio of the frost formation area.

5. The refrigeration system of claim 1 wherein said defrost device comprises: and the defrosting shoveling assembly is arranged on the defrosting layer on the inner side of the cold wall and drives the defrosting shoveling assembly to move the driving piece for shoveling the defrosting layer.

6. The refrigeration system of claim 5, wherein said frost shovel assembly comprises: and the frost spade piece is tightly attached to the cold wall and is transversely provided with a frost accumulation groove, and a frost pushing slider which is arranged in the frost accumulation groove and pushes out a frost layer in the frost accumulation groove is arranged in the frost accumulation groove.

7. The refrigeration system of claim 6 wherein said frost scooping member is elongated and has said frost accumulation grooves opening in a longitudinal direction to both ends, and a slope is provided at a top of a side of a wall of said frost accumulation groove surrounded by said frost scooping member to form a frost scooping portion.

8. The refrigerant system as set forth in claim 1, wherein said refrigerant cycle system includes: a compressor, a condenser, a throttle valve and the evaporator coil in cyclical communication.

9. A refrigeration system according to claim 1 wherein said coolant circulation system comprises: the secondary refrigerant pipeline is arranged on the circulating air channel and used for reducing the air temperature in the air channel, a secondary refrigerant liquid storage tank for collecting secondary refrigerant in the secondary refrigerant spray recovery device is arranged, and the secondary refrigerant in the secondary refrigerant liquid storage tank is sent to a secondary refrigerant pump of the secondary refrigerant spray recovery device through the secondary refrigerant pipeline.

10. A refrigeration system according to claim 1 wherein the liquid inlet portion of said coolant conduit is wrapped around said evaporator coil and the remainder of said coolant conduit is serpentine in configuration within the interior side of said cold wall.

11. The refrigeration system of claim 1, further comprising a spiral tower disposed on the circulation duct for cooling the cargo.

12. The refrigeration system of claim 11, wherein the inner side of the cold wall is the inner wall of one side of a quick-freezing warehouse provided with the refrigeration system, the spiral tower is arranged in the quick-freezing warehouse, and the air in the circulating air duct is blown to the cold wall through the spiral tower and then returned to the spiral tower after being blown to the secondary refrigerant spraying and recycling device of the secondary refrigerant circulating system through a circulating fan.