Refrigeration system

Abstract

The application discloses a refrigeration system, which comprises a cold wall, an inner side of the cold wall is located in a circulating air duct of the refrigeration system, a carrier refrigerant circulating system, a part of carrier refrigerant pipelines of the carrier refrigerant circulating system is embedded in the cold wall to supply cold to the wall, a refrigeration circulating system, evaporator coils of the refrigeration circulating system are embedded in the cold wall and are wound around the carrier refrigerant pipelines to supply cold, and a defrosting device for removing frost on the inner side of the cold wall. The application can realize non-stop defrosting, improve daily production capacity of the quick freezer and save energy consumption of rewarming and temperature-drawing after defrosting by embedding the carrier refrigerant pipelines and the evaporator coils in the cold wall and automatically removing the frost on the surface of the cold wall through the defrosting device arranged on the inner side wall of the cold wall, while ensuring the unchanged refrigeration effect in the quick freezer.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, specifically a refrigeration system. Background Technology

[0002] Most spiral freezers on the market use evaporative heat exchangers. However, evaporators are prone to frosting after prolonged operation, which causes a series of problems. First, frosting affects the heat exchange performance of the evaporator, leading to a decrease in the freezing rate. Second, frosting increases the operating burden on the compressor, resulting in increased energy consumption. To address the frosting problem, spiral freezers are typically shut down for defrosting every 6-7 hours of continuous operation. However, since freezers are large-scale refrigeration equipment, defrosting takes at least one hour, requiring 2-3 defrosting operations per day. Furthermore, to ensure that all goods inside the freezer are frozen before shutdown, feeding is stopped approximately 0.5 hours before defrosting. The entire defrosting process is both time-consuming and energy-intensive. After defrosting, the temperature rises, requiring the temperature to be lowered back to below -30°C before feeding resumes, further increasing energy and time costs. Summary of the Invention

[0003] In order to solve the technical problem that the spiral quick-freezing refrigeration system in the prior art cannot defrost continuously, the present invention proposes a refrigeration system.

[0004] The technical solution adopted in this invention is:

[0005] This invention proposes a refrigeration system, comprising:

[0006] The cold wall, the circulating air duct of the refrigeration system passes through the inner side of the cold wall;

[0007] The refrigerant circulation system has refrigerant pipes embedded in the cold wall to supply cooling to the wall.

[0008] A refrigeration cycle system in which the evaporator coil is embedded in the cold wall and wound around the refrigerant pipe for cooling;

[0009] A defrosting device is used to remove frost from the inside of the cold wall.

[0010] The present invention also includes an image acquisition device for acquiring image information of the inner side of a cold wall, and a controller for calculating the proportion of frost area based on the image information and controlling the defrosting device to remove the frost layer on the inner side of the cold wall based on the comparison result of the proportion of frost area with the preset proportion of frost area.

[0011] The image acquisition device acquires image information of the inside of the cold wall at preset time intervals, and the controller randomly selects a preset number of pixels and calculates the proportion of white pixels to obtain the proportion of the frosted area.

[0012] Preferably, the inner side of the cold wall is divided into multiple frost detection areas. When the proportion of frost area in any frost detection area is greater than the preset proportion of frost area, the controller controls the defrosting device to remove the frost layer on the inner side of the cold wall.

[0013] Furthermore, the defrosting device includes: a defrosting assembly installed on the inner side of the cold wall to remove the defrost layer, and a driving component that drives the defrosting assembly to move and remove the defrost layer.

[0014] Furthermore, the frost removal assembly includes: a frost removal component that is close to the cold wall and has a horizontally arranged frost groove, and a frost pushing slider installed in the frost groove to push out the frost layer in the frost groove.

[0015] Furthermore, the frost scraper is elongated and has frost grooves extending to both ends along its length. The top of one side of the frost scraper that forms the wall of the frost groove is provided with an inclined surface to form a frost scraping section.

[0016] Furthermore, the refrigerant circulation system includes: a compressor, a condenser, a throttling valve, and the evaporator coil, which are connected in a circulating manner.

[0017] The refrigerant circulation system includes: the refrigerant pipeline, a refrigerant spray recovery device installed on the circulating air duct to reduce the temperature of the air duct, a refrigerant storage tank for collecting the refrigerant from the refrigerant spray recovery device, and a refrigerant pump that sends the refrigerant from the refrigerant storage tank to the refrigerant spray recovery device via the refrigerant pipeline.

[0018] The inlet section of the refrigerant pipe is connected to the evaporator coil, while the remaining section of the refrigerant pipe is arranged in a serpentine pattern on the inner side of the cold wall.

[0019] The invention also includes a spiral tower disposed on the circulating air duct for cooling goods.

[0020] Specifically, the inner side of the cold wall is the inner wall of the quick-freezing room where the refrigeration system is installed. The spiral tower is installed inside the quick-freezing room. The air from the circulating air duct passes through the spiral tower and blows towards the cold wall, then passes through the circulating fan and blows towards the refrigerant spray recovery device of the refrigerant circulation system before returning to the spiral tower.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] By pre-embedding refrigerant pipes and evaporator coils within the cold wall, and automatically removing frost from the surface of the cold wall using a defrosting device installed on its inner side, defrosting can be performed without shutting down the machine, ensuring consistent refrigeration efficiency within the blast freezer. This increases the daily production capacity of the blast freezer and saves energy consumed during the reheating process after defrosting. The combination of the cold wall and the refrigerant circulation system enables rapid cooling of the air inside the blast freezer, thereby improving freezing efficiency.

[0023] By randomly statistically analyzing the proportion of white pixels on the cold wall, the percentage of area covered by frost is calculated to determine the degree of frost formation on the cold wall, thus enabling automatic defrosting.

[0024] Before the circulating air enters the spray heat exchanger, the air is dehumidified by a cold wall, which reduces the dilution effect of water vapor in the air on the refrigerant solution and avoids the risk of icing and pipe freezing in the spray system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the pipes laid on the cold wall in an embodiment of the present invention;

[0028] Figure 3 This is a partial structural schematic diagram of the defrosting device in an embodiment of the present invention;

[0029] Figure 4 This is a control flowchart in an embodiment of the present invention;

[0030] Figure 5 This is a control block diagram in an embodiment of the present invention;

[0031] 101. Condenser; 102. Compressor; 103. Throttling valve; 104. Refrigerant pump; 105. Defrosting device; 106. Image acquisition device; 107. Spiral tower; 108. Return air vent; 109. Circulating fan; 110. Refrigerant spray device; 111. Recovery tray; 112. Liquid baffle; 113. Refrigerant storage tank; 114. Cold wall; 115. Refrigerant piping; 116. Evaporator coil. Detailed Implementation

[0032] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0034] Because the blast freezer is a large-scale refrigeration equipment, defrosting takes at least one hour. Defrosting is required 2-3 times daily. Furthermore, to ensure all goods inside the blast freezer are frozen before the unit shuts down, feeding is stopped approximately 0.5 hours before defrosting. The entire defrosting process is both time-consuming and energy-intensive. After defrosting, the temperature rises, requiring the temperature to be lowered back to below -30°C before feeding resumes, further increasing energy and time costs. To address this, this invention proposes a continuous blast freezer system capable of non-stop defrosting. The refrigerant piping and evaporator coils are pre-embedded within a cold wall, and a defrosting device periodically removes the frost layer from the inside of the wall.

[0035] like Figure 1 , 2 As shown, this invention proposes a refrigeration system, specifically including: a blast freezer, a cold wall 114, a refrigerant circulation system, a refrigeration cycle system, and a defrosting device 105. One side wall of the blast freezer is the cold wall 114, and the blast freezer is equipped with a circulating air duct that passes through the cold wall 114. The refrigeration cycle system specifically includes a condenser 101, a throttling valve 103, a compressor 102, and an evaporator coil. The evaporator pipes provide cooling capacity, and the evaporator coils are pre-embedded within the cold wall 114 for cooling. The refrigerant circulation system includes refrigerant pipes pre-embedded within the cold wall 114 and wound around the evaporator coils, a refrigerant storage tank 113, and a refrigerant spray recovery device. Both the evaporator coil 116 and the refrigerant pipe 115 are embedded within the defrosting cold wall 114. The area of ​​the evaporator coil 116 flowing through the cold wall 114 is relatively small, used only for heat exchange with the wound portion of the refrigerant pipe. The refrigerant pipe 115 covers the entire cold wall 114, reducing the surface temperature of the cold wall 114 during refrigerant flow. Circulating air inside the freezer condenses on the cold wall 114 through the circulating air duct, and defrosting is performed using the defrosting device 105 at the bottom of the cold wall 114. Thus, defrosting can be performed without shutting down the freezer while maintaining the same heat exchange efficiency, increasing the daily production capacity of the freezer and saving energy consumption during post-defrosting warm-up. Furthermore, the combination of the cold wall 114 and the refrigerant circulation system enables rapid cooling of the air inside the freezer, thereby improving freezing efficiency.

[0036] It should be noted that the aforementioned pipes are embedded directly in contact with the wall without any gaps, ensuring smooth heat transfer.

[0037] Specifically, such as Figure 1 , 4As shown in Figure 5, the present invention also includes an image acquisition device 106 and a controller. The image acquisition device 106 acquires image information of the inner side of the cold wall 114. The controller can calculate the approximate frost area, and then control the defrosting device 105 to remove the frost layer on the inner side of the cold wall 114 based on the comparison result between the frost area and the preset frost area. That is, when the frost area is greater than the preset frost area, the 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.

[0038] Furthermore, when the defrosting program controller directly controls the defrosting device to work, the image acquisition device stops capturing images because the defrosting device will block the wall during operation, and the image information captured at this time cannot be used as a basis for judgment.

[0039] The specific method for obtaining the percentage of frost-covered area is as follows: the image acquisition device 106 acquires image information of the inner side of the cold wall 114 at preset time intervals. 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 uses this proportion as the percentage of frost-covered area. This is used by the controller to control the defrosting device 105.

[0040] The image acquisition device 106 can acquire image information of the inside of the cold wall 114 every 2 minutes. 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 uses this proportion as the percentage of the frosted area. This is used by the controller to control the defrosting device 105.

[0041] Furthermore, the inner side of the cold wall 114 is divided into multiple frost detection zones. When the proportion of frost area in any frost detection zone exceeds the preset proportion of frost area, the controller directly controls the defrosting device 105 to remove the frost layer on the inner side of the cold wall 114. This prevents excessive frost in a certain area from preventing the defrosting device from being triggered.

[0042] Specifically, such as Figure 2 As shown, the inner surface of the cold wall 114 can be divided into two frost detection areas, a and b, which are located at the top and bottom. When the proportion of frost area in the upper frost detection area a is greater than the preset frost area proportion, or when the proportion of frost area in the lower frost detection area b is greater than the preset frost area proportion, the defrosting device 105 directly scrapes the frost from the bottom of the cold wall 114 to the top of the cold wall 114, clearing both frost detection areas. By detecting frost in different areas, it is possible to avoid severe frost buildup in one area, which could affect the overall cooling performance.

[0043] It should be noted that the use of terms such as "a" and "b" to define the area is merely for the purpose of distinguishing the corresponding areas. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0044] In a specific embodiment, the defrosting device 105 includes: a defrosting assembly installed on the inner side of the cold wall 114 to remove the frost layer, and a driving component that drives the defrosting assembly to move and remove the frost layer. The defrosting part of the defrosting assembly is close to the inner side of the cold wall 114, and pushing it upward against the inner side of the cold wall 114 can remove the frost layer on the inner wall of the cold wall 114, thereby achieving the defrosting effect. The driving component can specifically be in the form of a vertical lead screw and slider. The lead screw is driven to rotate by a motor, and the slider is threadedly connected to the lead screw and fixedly connected to one end of the defrosting assembly. Rotating the vertical lead screw can drive the slider to move up and down, thereby driving the defrosting assembly to move upward to remove frost and downward to return to its original position.

[0045] Furthermore, such as Figure 3 As shown, the frost removal assembly includes: a frost removal component and a frost pushing slider 1052. The frost removal component is elongated and the same width as the wall, and is arranged horizontally along the cold wall 114 and close to the cold wall 114. The frost removal component has an frost accumulation groove 1053 along its length. The frost accumulation groove 1053 has an upward opening and is connected to both ends of the frost removal component. The top of one side of the frost removal component forming the groove wall of the frost accumulation groove is provided with a sloping surface to form a frost removal part 1051 with a pointed tip. The outer side of the frost removal part 1051 is close to the inner side wall of the cold wall 114, and the inner side of the frost removal part 1051 is the frost accumulation groove 1053, so that the frost layer scraped off by the frost removal part can fall directly into the frost accumulation groove. The frost-pushing slider 1052 is located at one end of the frost accumulation groove. It can be pushed from one end of the frost accumulation groove to the other end, thereby pushing the frost layer collected in the frost accumulation groove out of the frost accumulation groove. The specific driving device of the frost-pushing slider can also be a lead screw, a drive motor and a slider. This vertical driving method is relatively common in the prior art and will not be described in detail.

[0046] When the system enters the defrosting phase, the defrosting device moves from bottom to top and then returns to the bottom of the cold wall. The frost falls into the frost accumulation trough, and the frost-pushing slider moves from one side to the other side, pushing the frost out of the warehouse through the defrosting outlet. Then the frost-pushing slider returns to its original position, completing one automatic defrosting cycle.

[0047] Specifically, the refrigerant circulation system includes a compressor 102, a condenser 101, a throttling valve 103, and an evaporator coil, all connected in a circulating manner. The compressor 102 and condenser 101 are located outside the blast freezer. The evaporator coil, in a spiral shape, is embedded within the cold wall 114 to provide cooling for the refrigerant piping and part of the wall's surface. A partition is installed on the outer side of the cold wall 114 to prevent outward loss of cooling, ensuring that cooling is only transferred from within the cold wall 114 to its inner surface.

[0048] The refrigerant circulation system includes: a refrigerant pipeline; a refrigerant spray recovery device installed on the circulating air duct to reduce the duct temperature; a refrigerant storage tank 113 for collecting the refrigerant from the refrigerant spray recovery device; and a refrigerant pump 104 from the refrigerant storage tank 113 to the refrigerant spray recovery device via the refrigerant pipeline. The refrigerant pipeline is laid in a serpentine pattern within the entire cold wall 114. The inlet section of the refrigerant pipeline is wrapped around the evaporator coil, absorbing the cooling capacity of the evaporator coil, and reducing the surface temperature of the cold wall 114 during the refrigerant flow. The refrigerant storage tank 113 is located below the refrigerant pipeline, and the refrigerant pump 104 is installed on the connecting pipeline between the refrigerant storage tank 113 and the refrigerant pipeline to send the refrigerant in the refrigerant storage tank 113 to the refrigerant pipeline. The refrigerant spray recovery device is installed at the top of the quick-freezing room, located on the circulating air duct, to cool the circulating air in the circulating air duct. At the same time, the refrigerant spray recovery device is connected to the refrigerant storage tank 113 through a recovery pipe to recover the refrigerant after spraying and heat exchange into the refrigerant storage tank 113.

[0049] One inner wall of the quick-freezing storage is a cold wall 114. Inside the quick-freezing chamber, a spiral tower 107 located on the circulating air duct is used to cool goods. The air from the circulating air duct passes through the spiral tower 107 and is blown towards the cold wall 114, then through the circulating fan 109 at the top, towards the refrigerant spray recovery device of the refrigerant circulation system, and finally returns downward to the spiral tower 107 to complete the circulation. Before the circulating air enters the spray heat exchanger, the cold wall dehumidifies the air, reducing the dilution effect of water vapor in the air on the refrigerant solution and avoiding the risk of icing and pipe freezing in the spray system.

[0050] Specifically, the image acquisition device 106 is located on one side of the spiral tower 107, with its shooting direction facing the inner side of the cold wall, so that it can directly acquire image information of the cold wall.

[0051] The top of the blast freezer is partitioned off by a partition, forming a return air duct, which is part of the circulating air duct. The refrigerant spray recovery device and the circulating fan 109 are installed within this return air duct. The refrigerant spray recovery device specifically includes a refrigerant spray device 110, a recovery tray 111, and a baffle plate 112. The refrigerant spray device 110 is located on the top surface of the blast freezer, and the recovery tray 111 is located on the partition directly below the refrigerant spray device 110. The return air duct runs between the refrigerant spray device 110 and the recovery tray 111. The baffle plate 112 blocks the flow of liquid. On the air outlet side of the refrigerant spray device 110 and the recovery tray 111, the refrigerant spray device 110 sprays fine refrigerant, which repeatedly exchanges heat with the air flowing through the recovery air duct before falling into the recovery tray 111. Then, it returns to the refrigerant storage tank 113 through the recovery pipe. Simultaneously, the baffle plate 112 prevents the refrigerant from flowing directly out of the return air duct with the airflow. Specifically, the baffle plate 112 can be configured as multiple baffles spaced apart from top to bottom and inclined upwards, allowing the refrigerant blown onto the baffle plate 112 to flow downwards back into the recovery tray 111, entering the next refrigerant cycle.

[0052] The refrigerant circulation system proposed in this invention includes a condenser, a throttling valve, a compressor, and an evaporator coil. The refrigerant circulation system includes refrigerant piping wound around the evaporator coil, a refrigerant storage tank, and a refrigerant spraying and recovery device. Both the evaporator coil and the refrigerant piping are pre-embedded in the defrosting cold wall. The area of ​​the evaporator coil flowing through the cold wall is small, used only for heat exchange with the wound portion of the refrigerant piping. The refrigerant piping covers the entire cold wall. During the refrigerant flow, it lowers the surface temperature of the cold wall, causing frost to form on the cold wall as the circulating air inside the cold storage. The automatic defrosting / ice removal device at the bottom of the cold wall and the control method achieve intelligent identification and defrosting without shutting down the system. The refrigerant passes through the cold wall and reaches the spraying device above the cold storage, where it is sprayed out from the nozzles to lower the temperature of the circulating air inside the cold storage. It then falls into the refrigerant recovery tray and is recovered through piping to the refrigerant storage tank for the next refrigerant cycle. When applied in a blast freezer, this system can achieve defrosting without shutting down the machine while maintaining the same heat exchange effect inside the freezer, thereby increasing the daily production capacity of the blast freezer and saving energy consumption during the reheating and warming process after defrosting.

[0053] It should be noted that the terminology used above is for describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0055] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A refrigeration system, characterized in that, include: The cold wall, the inner side of which is the inner wall of the quick-freezing room where the refrigeration system is installed, the quick-freezing room is equipped with a circulating air duct that passes through the inner side of the cold wall. The refrigerant circulation system has refrigerant pipes embedded in the cold wall to supply cooling to the wall. The refrigeration cycle system has its evaporator coil embedded in the cold wall and wrapped around the refrigerant pipe; A defrosting device is used to remove frost from the inside of the cold wall; A spiral tower, installed on the circulating air duct, is used to cool goods; The refrigerant circulation system includes: the refrigerant pipeline, a refrigerant spraying and recovery device installed on the circulating air duct to reduce the air temperature in the air duct, a refrigerant storage tank for collecting the refrigerant in the refrigerant spraying and recovery device, and a refrigerant pump for sending the refrigerant in the refrigerant storage tank to the refrigerant spraying and recovery device via the refrigerant pipeline. The circulating air duct forms a circulating airflow path within the quick-freezing chamber. The airflow path passes sequentially through the spiral tower, the inner side of the cold wall, the circulating fan, and the refrigerant spray recovery device before returning to the spiral tower. The inner side of the cold wall is the inner wall of one side where the quick-freezing chamber is located.

2. The refrigeration system as described in claim 1, characterized in that, It also includes an image acquisition device for acquiring image information of the inside of the cold wall, and a controller for calculating the proportion of the frost area based on the image information and controlling the defrosting device to remove the frost layer on the inside of the cold wall based on the comparison result of the proportion of the frost area with the preset proportion of the frost area.

3. The refrigeration system as described in claim 2, characterized in that, The image acquisition device acquires image information of the inside of the cold wall at preset time intervals, and the controller randomly selects a preset number of pixels and calculates the proportion of white pixels to obtain the proportion of the frosted area.

4. The refrigeration system as described in claim 2, characterized in that, The inner side of the cold wall is divided into multiple frost detection areas. When the proportion of frost area in any frost detection area is greater than the preset proportion of frost area, the controller controls the defrosting device to remove the frost layer on the inner side of the cold wall.

5. The refrigeration system according to claim 1, characterized in that, The defrosting device includes: a defrosting assembly installed on the inner side of the cold wall to remove the defrost layer, and a driving component that drives the defrosting assembly to move and remove the defrost layer.

6. The refrigeration system as described in claim 5, characterized in that, The frost removal assembly includes: a frost removal component that is attached to the cold wall and has a horizontally arranged frost groove, and a frost pushing slider installed in the frost groove to push out the frost layer in the frost groove.

7. The refrigeration system as described in claim 6, characterized in that, The frost scraper is elongated and has frost grooves extending to both ends along its length. The top of one side of the frost scraper that forms the wall of the frost groove is provided with an inclined surface to form a frost scraping section.

8. The refrigeration system as described in claim 1, characterized in that, The refrigeration cycle system includes: a compressor, a condenser, a throttling valve, and an evaporator coil that are connected in a circulating manner.

9. The refrigeration system as described in claim 1, characterized in that, The inlet portion of the refrigerant pipe is wrapped around the evaporator coil, while the remaining portion of the refrigerant pipe is arranged in a serpentine pattern on the inner side of the cold wall.

10. The refrigeration system as claimed in claim 1, characterized in that, It also includes a spiral tower installed on the circulating air duct for cooling goods.

11. The refrigeration system as described in claim 10, characterized in that, The inner side of the cold wall is the inner wall of the quick-freezing room where the refrigeration system is installed. The spiral tower is installed inside the quick-freezing room. The air from the circulating air duct passes through the spiral tower and blows towards the cold wall, then passes through the circulating fan and blows towards the refrigerant spray recovery device of the refrigerant circulation system before returning to the spiral tower.

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