Refrigerator and freezer dual-temperature zone low-power consumption display cabinet

Abstract

The utility model relates to low -power consumption display cabinet technical field discloses a kind of cold storage, freezing dual-temperature zone low -power consumption display cabinet, including cabinet, upper cabinet door and lower cabinet door are arranged in cabinet interior, for enhancing the air tightness inside, reduce cold air leakage;Heat insulation plate is arranged in the inside of cabinet, and the cabinet is divided into upper side cold storage area and lower side freezing area;Unit and evaporator are arranged in the inside of cabinet, ensure that there is stable cold air flow output in air supply passage;Layer board is arranged in the inside of cabinet, for placing article;Forma wheel is arranged below cabinet, for the movement and positioning of cabinet;The inner wall of the cabinet is fixedly connected with ventilation plate, and the inner wall of the ventilation plate is fixedly connected with fan two. In the utility model, upper cabinet door, lower cabinet door adopt double -layer hollow toughened glass and electric heating film design, cooperate with double air bag magnetic sealing strip, can effectively prevent glass condensation and cold air leakage, and heat insulation plate divides the cabinet into independent cold storage area and freezing area.

Description

Technical Field

[0001] This utility model relates to the field of low-power display cabinet technology, and in particular to a low-power display cabinet with dual temperature zones for refrigeration and freezing. Background Technology

[0002] In the food cold chain retail sector, dual-temperature display cases are widely used due to their ability to simultaneously display refrigerated and frozen products. However, traditional equipment has significant shortcomings in terms of temperature stability and energy consumption control, especially the problem of temperature crosstalk between the frozen and refrigerated zones. This not only affects the food preservation effect but also increases the load on the refrigeration system. With the increasing requirements for energy conservation and environmental protection and the stricter food quality standards, the development of display cases with efficient sealing and precise temperature control capabilities has become an urgent need for the industry.

[0003] Currently, dual-temperature display cabinets on the market mainly use a single-layer glass door with ordinary rubber sealing strips. Some products distinguish the temperature zones by setting a simple partition in the middle of the cabinet. The refrigeration system mostly adopts a dual evaporator design, with the freezer and refrigerator zones circulating independently. Temperature control relies on a mechanical thermostat to regulate the compressor's start and stop. The airflow organization adopts a single fan direct blowing method, resulting in poor uniformity of cold air distribution.

[0004] Existing display cases suffer from temperature cross-interference. Due to the lack of effective sealing and isolation, cold air from the freezer compartment leaks into the refrigeration compartment through gaps in the partitions and poor sealing, resulting in large temperature fluctuations in the refrigeration compartment. This not only causes frost to form on the surface of refrigerated food, but also forces the compressor to start frequently to compensate for the loss of cold energy. Therefore, a low-power display case with dual temperature zones for refrigeration and freezing is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a low-power display cabinet with dual temperature zones for refrigeration and freezing, which aims to improve the problem that cold air from the freezing zone will leak into the refrigeration zone through gaps in the partitions and poor door seals due to the lack of effective sealing and isolation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-power display cabinet with dual-temperature zones for refrigeration and freezing, suitable for precise temperature control with single-cooling operation, comprising: The cabinet has upper and lower doors inside to enhance internal airtightness and reduce cold air leakage. Insulation panels are installed inside the cabinet, dividing the cabinet into an upper refrigeration area and a lower freezer area; The unit and evaporator are installed inside the cabinet to ensure a stable cold airflow output in the air supply duct; Shelves, located inside the cabinet, are used to store items; The fenders are located at the bottom of the cabinet and are used for moving and positioning the cabinet.

[0007] Furthermore, a ventilation plate is fixedly connected to the inner wall of the cabinet, and a second fan is fixedly connected to the inner wall of the ventilation plate.

[0008] Furthermore, the lower surface of the ventilation plate is fixedly connected to the upper surface of the heat insulation plate, and the ventilation plate has multiple holes as air outlets for the cold airflow in the cold storage area.

[0009] Furthermore, the evaporator is located above the unit. The evaporator absorbs heat through refrigerant evaporation to generate cold airflow, providing a stable low-temperature air source for the air supply channel.

[0010] Furthermore, a connecting plate is fixedly connected to the inner wall of the heat insulation plate. The connecting plate ensures the stability of the fan and the air duct, and ensures the smooth delivery of cold air in the main air duct.

[0011] Furthermore, a fan three is fixedly connected to the inner wall of the connecting plate one. The fan three drives part of the cold air generated by the evaporator to enter the back air duct of the cold storage area through the auxiliary air duct, and mixes with the cold storage air drawn in by the fan two.

[0012] Furthermore, a second connecting plate is fixedly connected to the lower surface of the heat insulation plate. The second connecting plate serves to divert the cold airflow, rationally distributing the cold airflow generated by the evaporator to the main air duct and the auxiliary air duct, ensuring the coordination of the cooling supply in the two zones.

[0013] Furthermore, a fan is installed below the heat insulation plate, and the fan drives part of the cold airflow from the evaporator into the freezing zone through the main air duct.

[0014] This utility model has the following beneficial effects: In this invention, the upper and lower cabinet doors are designed with double-layer hollow tempered glass and electric heating film, combined with double-airbag magnetic sealing strips, which can effectively prevent condensation on the glass and leakage of cold air. The heat insulation board divides the cabinet into independent refrigeration and freezing areas, avoiding temperature crosstalk between the two areas. This sealing structure makes the temperature fluctuations in the refrigeration and freezing areas smaller, reducing the risk of food spoilage due to unstable temperature, while reducing the frequency of frequent start-stop of the unit, significantly reducing cold energy loss, and achieving low power consumption operation.

[0015] In this invention, the evaporator is connected to the cabinet via an air duct. Under the action of fan one, fan two, and fan three, a closed-loop airflow is formed. The cold air in the freezing zone is transported through the main air duct and then circulates from the bottom return air vent. The cold air in the refrigeration zone is mixed with the internal airflow through the auxiliary air duct and then circulates through the ventilation plate openings. This circulation mode ensures that the cold airflow evenly covers every space in both zones, avoiding local temperature differences. At the same time, the fan speed is adjusted in conjunction with the temperature probe to accurately match the cooling needs, ensuring that the food is cooled evenly, reducing ineffective energy consumption, and improving the overall cooling efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a low-power display cabinet with dual temperature zones for refrigeration and freezing proposed in this utility model; Figure 2 This is a schematic diagram of the shelf structure of a low-power display cabinet with dual temperature zones for refrigeration and freezing proposed in this utility model. Figure 3 This is a schematic diagram of the heat insulation panel structure of a low-power display cabinet with dual temperature zones for refrigeration and freezing proposed in this utility model. Figure 4 This is a schematic diagram of the three-part structure of the fan of a low-power display cabinet with dual temperature zones for refrigeration and freezing proposed in this utility model; Figure 5 This is a schematic diagram of the two-part structure of the connecting plate of a low-power display cabinet with dual temperature zones for refrigeration and freezing proposed in this utility model.

[0017] Legend: 1. Cabinet body; 2. Upper cabinet door; 3. Lower cabinet door; 4. Fuma wheel; 5. Unit; 6. Evaporator; 7. Fan 1; 8. Connecting plate 1; 9. Fan 2; 10. Shelf; 11. Ventilation plate; 12. Insulation plate; 13. Fan 3; 14. Connecting plate 2. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-5This utility model provides an embodiment of a low-power display cabinet with dual-temperature zones for both refrigeration and freezing. The dual-temperature zone low-power display cabinet is suitable for precise temperature control with single-cooling operation. It includes: a cabinet body 1, with an upper door 2 and a lower door 3 inside. The upper door 2 and lower door 3 are made of double-layered hollow tempered glass and an electric heating film to prevent condensation on the glass surface. The door seals use double-airbag magnetic sealing strips to enhance airtightness and prevent cold air leakage and temperature zone cross-contamination, thereby enhancing internal airtightness and reducing cold air leakage; and a heat insulation board 12, installed inside the cabinet body 1, dividing the cabinet body 1 into an upper refrigeration zone and a lower freezing zone, using high-efficiency heat insulation material to block heat transfer between the two zones. To prevent temperature fluctuations and ensure stable temperatures in each zone, the unit 5 and evaporator 6 are located inside the cabinet 1 to ensure a stable cold airflow output in the air supply duct. Shelves 10 are located inside the cabinet 1 for placing items. Casters 4 are located below the cabinet 1 for moving and positioning the cabinet 1. A ventilation plate 11 is fixedly connected to the inner wall of the cabinet 1, and a second fan 9 is fixedly connected to the inner wall of the ventilation plate 11. The second fan 9 is used for airflow circulation inside the refrigeration area, drawing the airflow inside the refrigeration area into the back air duct and mixing it with the low-temperature airflow delivered by the third fan 13. The circulation volume of the airflow inside the refrigeration area is controlled by adjusting the speed, thus participating in the temperature regulation of the refrigeration area.

[0020] Reference Figures 1-5 The lower surface of the ventilation plate 11 is fixedly connected to the upper surface of the heat insulation plate 12. The ventilation plate 11 has multiple holes, serving as outlets for the cold airflow in the cold storage area. The mixed cold airflow is evenly delivered into the cold storage area through these holes, ensuring uniform temperature distribution. The evaporator 6 is positioned above the unit 5. The evaporator 6 generates cold airflow by absorbing heat through refrigerant evaporation, providing a stable low-temperature air source for the air supply duct. A connecting plate 8 is fixedly connected to the inner wall of the heat insulation plate 12. The connecting plate 8 ensures the stability of the fan 13 and the air duct, guaranteeing smooth delivery of cold airflow within the main air duct. The fan 13 is fixedly connected to the inner wall of the connecting plate 8, driving the evaporator. Part of the cold air generated by evaporator 6 enters the back air duct of the refrigeration zone through the auxiliary air duct, and mixes with the airflow of the refrigeration zone drawn in by fan 9. The input amount of low-temperature airflow is controlled by adjusting the speed, and the temperature of the refrigeration zone is precisely regulated by the temperature probe. A connecting plate 14 is fixedly connected to the lower surface of the insulation plate 12. The connecting plate 14 plays the role of diverting the cold airflow, and reasonably distributes the cold airflow generated by evaporator 6 to the main air duct and the auxiliary air duct to ensure the coordination of the cold supply in the two zones. A fan 7 is set below the insulation plate 12. The fan 7 drives part of the cold airflow from evaporator 6 into the freezing zone through the main air duct. The circulation amount of the airflow inside the refrigeration zone is controlled by adjusting the speed, and it participates in the temperature regulation of the refrigeration zone.

[0021] Working principle: When using the low-power display cabinet with dual temperature zones of refrigeration and freezing, the upper cavity of the cabinet 1 is the refrigeration zone and the lower cavity is the freezing zone. The heat insulation plate 12 divides the cabinet into two independent chambers to ensure that the temperature does not interfere with each other. Items are placed on the shelves 10. The casters 4 under the cabinet 1 can slide flexibly to facilitate the movement and positioning of the display cabinet. The unit 5 in the cabinet 1 generates cold energy by using the phase change of the refrigerant through the linkage of core components such as the compressor, condenser, and evaporator 6, and continuously provides a low temperature source for the evaporator 6 to ensure a stable cold airflow output in the air supply channel. The cabinet is equipped with an air supply duct connecting the refrigeration and freezing areas. This duct is directly connected to the evaporator 6 and the cold air is split through the connecting plate 14. Fans 7, 9, and 13 are all variable frequency fans. After being powered on, under the action of fan 7, part of the cold air enters the freezing area through the main air duct. The bottom of the freezing area near the glass door is equipped with a return air vent, which is connected to the bottom air duct to form a closed-loop airflow circulation, ensuring uniform temperature in the freezing area. The remaining cold air enters the back air duct of the refrigeration area through the auxiliary air duct under the action of fan 13. At the same time, the air in the refrigeration area also enters the back air duct under the drive of fan 9. The two airflows mix and are sent into the refrigeration area through the openings on the ventilation plate 11, forming a closed-loop airflow circulation in the refrigeration area. The equipment monitors the temperature of both zones in real time using internal temperature probes. For the freezer zone, the speed of fan 7 is adjusted based on the temperature probe readings to control the airflow entering the freezer zone, thereby precisely regulating the freezer zone temperature. For the refrigerator zone, the low-temperature airflow drawn in by fan 13 mixes with the refrigerator zone airflow drawn in by fan 9 before entering the refrigerator space. The speeds of fans 13 and 9 are adjusted based on the temperature probe readings to achieve precise temperature control in the refrigerator zone. The total heat load equals the sum of the freezer heat load and the refrigerator heat load. The total heat load changes with the heat loads of the refrigerator and freezer zones, as shown in the following formula: Q 总 =Q 藏 +Q 冻 .

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-power display cabinet with dual temperature zones for refrigeration and freezing, characterized in that: Dual-temperature zone low-power display cabinets are suitable for precise temperature control with single-cooling system, including: Cabinet (1), with an upper cabinet door (2) and a lower cabinet door (3) inside the cabinet (1) to enhance the airtightness of the interior and reduce cold air leakage; Insulation panel (12) is installed inside cabinet (1) to divide cabinet (1) into upper refrigeration area and lower freezer area; The unit (5) and the evaporator (6) are installed inside the cabinet (1) to ensure a stable cold airflow output in the air supply channel; Shelves (10) are installed inside the cabinet (1) for placing items; The forewheel (4) is located below the cabinet (1) and is used for moving and positioning the cabinet (1); The inner wall of the heat insulation plate (12) is fixedly connected to a connecting plate (8). The connecting plate (8) ensures the stability of the fan (13) and the air duct, and ensures the smooth delivery of cold air in the main air duct. The inner wall of the connecting plate 1 (8) is fixedly connected to the fan 3 (13). The fan 3 (13) drives the evaporator (6) to generate part of the cold air flow, which enters the back air duct of the cold storage area through the auxiliary air duct and mixes with the cold storage air flow sucked in by the fan 2 (9). The lower surface of the insulation plate (12) is fixedly connected to the connecting plate two (14), which serves to divert the cold airflow and rationally distribute the cold airflow generated by the evaporator (6) to the main air duct and the auxiliary air duct, ensuring the coordination of the cold supply in the two zones; A fan (7) is installed below the heat insulation plate (12). The fan (7) drives part of the cold air flow from the evaporator (6) through the main air duct into the freezing zone.

2. The low-power display cabinet with dual temperature zones for refrigeration and freezing according to claim 1, characterized in that: A ventilation plate (11) is fixedly connected to the inner wall of the cabinet (1), and a second fan (9) is fixedly connected to the inner wall of the ventilation plate (11).

3. The low-power display cabinet with dual temperature zones for refrigeration and freezing according to claim 2, characterized in that: The lower surface of the ventilation plate (11) is fixedly connected to the upper surface of the heat insulation plate (12). The ventilation plate (11) has multiple holes, which serve as the outlet for the cold airflow in the cold storage area.

4. The low-power display cabinet with dual temperature zones for refrigeration and freezing according to claim 1, characterized in that: The evaporator (6) is located above the unit (5). The evaporator (6) absorbs heat through refrigerant evaporation to generate cold airflow, providing a stable low-temperature air source for the air supply channel.

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