Air cooling service type refrigerated display cabinet
By introducing rectifier plates and evaporators into air-cooled service-type refrigerated display cabinets, the problem of dry food consumption caused by cold air flow in traditional air-cooled refrigerators is solved, and a more uniform temperature distribution is achieved and a significant reduction in dry food consumption is achieved.
Patent Information
- Application Number
- CN202420940325.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-02
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-02
AI Technical Summary
During the flow of the traditional air-cooled display cabinet, the wind speed accelerates due to gravity and heat and humidity exchange, forming a huge turbulent area, resulting in an increase in dry food consumption.
The rectifier plate is introduced into the air-cooled service refrigerated display cabinet, located between the return air outlet and the display panel. The rectifier plate is designed as L-shaped or arc-shaped, transparent material, connecting the return air outlet and the back plate, and separating the display chamber as the display space and air passage , and set up an evaporator and fan in the air duct to reduce the air volume and wind speed flowing through the food surface.
It effectively reduces the wind speed and dry consumption of food surfaces, improves temperature uniformity and food preservation effect, and can reduce the dry consumption of food by 43% to 55% compared to traditional air-freezing cabinets.
Smart Images
Figure CN222217570U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the refrigeration industry, and specifically relates to an air-cooled service-type refrigerated display cabinet. Background Art
[0002] The cold air operation status of the traditional air-cooled display cabinet is as follows:
[0003] The cold air flows directly from the air outlet on one side to the return air outlet on the other side. The cold air flowing out of the air outlet on one side forms a forward-flowing airflow above the food. At the same time, under the influence of gravity and the sinking of cold air, the cold air will fall down to the surface of the food during the forward flow in the display bin. The more air volume that passes over the surface of the food, the faster the wind speed, and the greater the dry loss of food.
[0004] As the airflow flows forward in the display bin, it exchanges heat and moisture with the air in the display bin. The temperature gradually rises, the moisture content gradually increases, and the moisture absorption capacity gradually increases. When approaching the return air outlet, the moisture absorption capacity reaches the strongest. Affected by the return air outlet and glass protection, the wind speed on the food surface near the return air outlet accelerates and forms a huge turbulent area. Therefore, the closer the food is to the return air outlet, the greater the dry loss. Utility Model Content
[0005] In view of the above shortcomings of the prior art, an air-cooled service refrigerated display cabinet is provided.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] An air-cooled service-type refrigerated display cabinet comprises a lower cabinet body, a display bin arranged on the lower cabinet body, a back plate arranged in the display bin, a display board, a return air outlet, and a rectifier plate. The back plate and the return air outlet are arranged at two ends of the display board relative to each other, an air outlet duct is formed between the back plate and the display bin, the display board divides the display bin into an upper display space and a lower air duct, the air duct and the air outlet duct are connected, an evaporator and a fan are arranged in the air duct, an air outlet is opened on the back plate, the rectifier plate is located between the return air outlet and the display board, one end of the rectifier plate is connected to the display board of the return air outlet, and the other end extends upward along the return air outlet and then extends toward the back plate.
[0008] Furthermore, the rectifying plate is L-shaped or arc-shaped.
[0009] Furthermore, the rectifying plate is made of a transparent material.
[0010] Furthermore, an air duct plate is provided under the display board, which divides the air duct into a first air duct at the bottom and a second air duct at the top. There is a gap between the air duct plate and the back of the display bin. The first air duct is connected to the second air duct and the air outlet duct through the gap. The evaporator and the fan are arranged in the first air duct, and a plurality of air outlet holes are arranged on the display board.
[0011] Furthermore, the vertical height of the rectifier plate is 0.2 to 2 times the height of the air outlet, and the horizontal width of the rectifier plate is 0 to 0.8 times the width of the display board.
[0012] Furthermore, the vertical height of the rectifier plate is 0.5 to 1.5 times the height of the air outlet, and the horizontal width of the rectifier plate is 0.05 to 0.5 times the width of the display board.
[0013] Compared with the prior art, the beneficial effects of the utility model are to reduce the air volume flowing through the food surface, reduce the wind speed on the food surface, and reduce dry loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 and 2 This is a schematic structural diagram of Example 1 of the utility model.
[0015] Figure 3 and 4 This is a schematic structural diagram of Example 2 of the utility model.
[0016] Figure 5 and 6 It is a schematic diagram of the structure of an air cooling cabinet in the prior art. DETAILED DESCRIPTION
[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.
[0019] like Figure 5 and 6 As shown, the return air outlet of the air cooling cabinet in the prior art is not provided with a rectifier plate.
[0020] Figure 5 In the process, the cold air blows out from the air outlet on the back panel, forming a forward-flowing airflow. At the same time, under the influence of gravity and the sinking of cold air, it will fall down to the surface of the food in the process of flowing forward in the display bin, and finally flow to the return air outlet. In the process of flowing forward, it exchanges heat and moisture with the air in the display bin, and the temperature gradually rises, the moisture content gradually increases, and the moisture absorption capacity gradually increases. When it approaches the return air outlet, the moisture absorption capacity reaches the strongest. Affected by the return air outlet and glass maintenance, the wind speed on the surface of the food near the return air outlet increases and forms a huge turbulent area. Therefore, the closer the food is to the return air outlet, the greater the dry loss.
[0021] Figure 6 In, referring to Chinese patent 2023202009715, Figure 5 On the basis of the cooling fan, air outlets on the display board are added. Part of the cold air is blown out from the air outlet and directly reaches the most unfavorable temperature point in the cabinet, reducing the temperature difference in the cabinet and improving the refrigeration efficiency. Part of the air flows under the food plate, and the other part flows upward through the gap between the plates. It can also reduce the airflow blown out from the air outlet on the back panel and support its forward flow upward, further reducing the dry loss. However, there is still a huge turbulent area at the return air outlet. Therefore, the closer the food is to the return air outlet, the greater the dry loss.
[0022] Example 1
[0023] like Figure 1 and 2 As shown, an air-cooled service refrigerated display cabinet comprises a lower cabinet body 1, a display bin 2 arranged on the lower cabinet body 1, a back panel 3 arranged in the display bin 2, a display board 4, a return air outlet 5, and a rectifier plate 9. The back panel 3 and the return air outlet 5 are arranged at two ends of the display board 4 relatively to each other, and an air outlet duct is formed between the back panel 3 and the display bin 2. The display board 4 divides the display bin 2 into an upper display space and a lower air duct. The air duct and the air outlet duct are connected. An evaporator 6 and a fan 7 are arranged in the air duct. An air outlet 8 is opened on the back panel 3. The rectifier plate 9 is located between the return air outlet 5 and the display board 4. One end of the rectifier plate 9 is connected to the display board 4 of the return air outlet 5, and the other end extends upward along the return air outlet and then extends toward the back panel 3.
[0024] Example 2
[0025] like Figure 3 and 4 As shown, an air-cooled service refrigerated display cabinet comprises a lower cabinet body 1, a display bin 2 arranged on the upper cabinet body 1, a back panel 3 arranged in the display bin 2, a display board 4, a return air port 5, and a rectifier plate 9. The back panel 3 and the return air port 5 are arranged at two ends of the display board 4, and an air outlet duct is formed between the back panel 3 and the display bin 2. The display board 4 divides the display bin 2 into an upper display space and a lower air duct. The air duct and the air outlet duct are connected. An evaporator 6 and a fan 7 are arranged in the air duct. An air outlet 8 is opened on the back panel 3. An air duct plate 10 is arranged below the display board, and the air duct plate divides the air duct into a first air duct at the bottom and a second air duct at the top. There is a gap between the air duct plate and the back of the display bin, and the first air duct is connected with the second air duct and the air outlet duct through the gap. The evaporator and the fan are arranged in the first air duct, and a plurality of air outlet holes are arranged on the display board. The rectifier plate 9 is located between the return air outlet 5 and the display board 4, and one end of the rectifier plate 9 is connected to the display board 4 of the return air outlet 5, and the other end extends upward along the return air outlet and then extends toward the back plate 3.
[0026] In Example 1 and Example 2, by adding a rectifier plate at the return air outlet, the trajectory of the cold air movement is sorted out, the range of the turbulent area is reduced, a large amount of airflow with strong moisture absorption capacity is avoided from passing over the food surface, and the food dry loss is effectively reduced.
[0027] The rectifier plate 9 can be designed to be L-shaped or arc-shaped, etc. The vertical height of the rectifier plate is 0.2 to 2 times the height of the air outlet, and the horizontal width of the rectifier plate is 0 to 0.8 times the width of the display board.
[0028] In order to achieve better results, the vertical height of the rectifier plate is 0.5 to 1.5 times the height of the air outlet, and the horizontal width of the rectifier plate is 0.05 to 0.5 times the width of the display board.
[0029] Temperature balance test and food dry loss test
[0030]
[0031] Temperature equalization test.
[0032] Test environment: Conducted in a closed room with adjustable ambient temperature and humidity, the ambient temperature is controlled at 32±0.5℃, and the humidity is controlled at 50±5﹪. This experiment uses a test bag for testing.
[0033] This experiment uses a temperature recorder to collect data. Each freezer is equipped with 9 temperature test points, which are the left front, left center, left back, center front, center center, center back, right front, right center, and right back. After the display cabinet has been running for 24 hours, the load temperature in the cabinet has reached a stable state. At this time, the test temperature (℃) is recorded, and data is collected once every minute. The data for 6 hours is collected for analysis. The data obtained is shown in the following table (due to the large amount of data, this table only includes data once every 10 minutes).
[0034] Figure 5 Cabinet Type
[0035]
[0036]
[0037] Figure 1 Cabinet Type
[0038]
[0039]
[0040] Figure 3 Cabinet Type
[0041]
[0042]
[0043]
[0044] Analysis of the temperature balance results of the above three cabinet types: Figure 5 The temperature difference in the cabinet is 5.1℃. Figure 1 The temperature difference in the cabinet is 3.2℃. Figure 3 The temperature difference in the cabinet is 2.8°C. Compared with the traditional air-cooled cabinet, the temperature in the cabinet of the utility model is significantly more uniform, eliminating the too low temperature points and the too high temperature points, and effectively avoiding some foods from freezing and condensing due to low temperature and some foods from spoiling due to high temperature.
[0045] Food dry consumption test.
[0046] Test environment: Carried out in a closed room with adjustable ambient temperature and humidity. The ambient temperature is controlled at 32±0.5℃ and the humidity is controlled at 50±5﹪.
[0047] The experimental load selected Jiuyuquan brand cooked food: duck necks and duck clavicles. Each type of cooked food was packed into three melamine plates and placed in the cabinet at the front, middle and back positions to simulate a real sales scenario.
[0048] This experiment measures the weight of food before and after it is placed in the cabinet for 6 hours and observes the change in food color to determine the amount of food dry loss. The weight (g) and weight loss of food before and after the experiment are shown in the following table.
[0049]
[0050] From the table we can see that:
[0051] Figure 5 The total weight loss of the cabinet is 178.1g.
[0052] Figure 1 The total weight loss of the cabinet is 101g, and the dry loss can be reduced by 43%.
[0053] Figure 3 The total weight loss of the cabinet is 80.5g, and the dry loss can be reduced by 55%.
[0054] Observe the color and surface condition of food:
[0055] Figure 5 The food in the cabinet becomes obviously dry after 1 hour, and becomes black in color and has a dry and dull surface after 6 hours. Figure 1 After 6 hours in the cabinet, the food surface still has a slight luster, the food surface is slightly dry, and the food state is close to Figure 5 1h status in cabinet type; Figure 3 After 6 hours in the cabinet, the food surface still has a slight luster, and there is no obvious dryness on the food surface. The food state is better than the Figure 51h state in the cabinet type. Compared with the traditional air-cooled cabinet, the dry loss of food in the cabinet of the utility model is significantly reduced.
[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. An air-cooled service refrigerated display cabinet, comprising a lower cabinet, a display bin arranged on the lower cabinet, a back panel arranged in the display bin, a display board, a return air outlet, and a rectifier plate, wherein the back panel and the return air outlet are arranged at two ends of the display board relative to each other, an air outlet duct is formed between the back panel and the display bin, the display board divides the display bin into an upper display space and a lower air duct, the air duct and the air outlet duct are connected, an evaporator and a fan are arranged in the air duct, an air outlet is opened on the back panel, the rectifier plate is located between the return air outlet and the display board, one end of the rectifier plate is connected to the display board of the return air outlet, and the other end extends upward along the return air outlet and then extends toward the back panel.
2. The air-cooled service refrigerated display cabinet according to claim 1, characterized in that: The rectifying plate is L-shaped or arc-shaped.
3. The air-cooled service refrigerated display cabinet according to claim 1, characterized in that: The rectifying plate is made of transparent material.
4. The air-cooled service refrigerated display cabinet according to claim 1, characterized in that: An air duct plate is arranged under the display board, which divides the air duct into a first air duct at the bottom and a second air duct at the top. There is a gap between the air duct plate and the back of the display bin. The first air duct is connected with the second air duct and the air outlet duct through the gap. The evaporator and the fan are arranged in the first air duct, and a plurality of air outlet holes are arranged on the display board.
5. An air-cooled service refrigerated display cabinet according to any one of claims 1 to 4, characterized in that: The vertical height of the rectifier plate is 0.2 to 2 times the height of the air outlet, and the horizontal width of the rectifier plate is 0 to 0.8 times the width of the display board.
6. The air-cooled service refrigerated display cabinet according to claim 5, characterized in that: The vertical height of the rectifier plate is 0.5 to 1.5 times the height of the air outlet, and the horizontal width of the rectifier plate is 0.05 to 0.5 times the width of the display board.