Constant-temperature air supply system and constant-temperature storage equipment

Abstract

The utility model belongs to the technical field of constant temperature, and discloses a constant-temperature air supply system and constant-temperature storage equipment. The constant-temperature air supply system comprises a refrigeration unit and an air supply unit, the refrigeration unit comprises a case, a liquid inlet pipe, an expansion valve, an evaporator and a liquid outlet pipe, the liquid inlet pipe, the expansion valve, the evaporator and the liquid outlet pipe are sequentially communicated, the case forms a refrigeration space, the expansion valve and the evaporator are located in the refrigeration space, and the liquid inlet pipe and the liquid outlet pipe extend out of the case. The air supply unit comprises a fan, an air supply pipeline and a plurality of air supply nozzles, the fan is located in the refrigeration space, one end of the air supply pipeline is communicated with the refrigeration space, the other end of the air supply pipeline extends out of the refrigeration space, the fan blows air into the air supply pipeline, the air supply nozzles are evenly distributed on the pipe wall of the air supply pipeline, and the opening degree and the blowing angle of the air supply nozzles can be adjusted. According to the constant-temperature air supply system, cold air can be conveyed at multiple positions, the air outlet amount and the air outlet direction can be adjusted, and uniform conveying of the cold air is achieved.

Description

Technical Field

[0001] This utility model relates to the field of constant temperature technology, and in particular to a constant temperature air supply system and a constant temperature storage device. Background Technology

[0002] With rapid economic development, people's demand for the quality of fruits and vegetables is increasing, making the development of constant-temperature storage technology for fruits and vegetables an inevitable trend. Fruit and vegetable cold storage uses refrigeration equipment to create suitable temperature and humidity for the cold storage and preservation of fruits and vegetables. It serves as a place for processing and storing agricultural products, extending the shelf life of fruits and vegetables and maintaining their freshness and crispness.

[0003] To improve economic efficiency, higher requirements are being placed on the loading coefficient of cold storage facilities, making high-density loading a development trend. Current storage methods typically involve workers piling large quantities of fruits and vegetables into temperature-controlled equipment. The dense packing of fruits and vegetables on the shelves inside the cold storage can lead to uneven airflow and heat exchange, hindering air circulation within the produce. This results in the fruits and vegetables being prone to rotting and mold growth, negatively impacting storage effectiveness and causing unnecessary economic losses.

[0004] Therefore, there is an urgent need for a constant temperature air supply system and a constant temperature storage device to solve the above problems. Utility Model Content

[0005] One objective of this invention is to provide a constant temperature air supply system that can adjust the air volume and air direction to ensure uniform air supply.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A constant temperature air supply system is provided, comprising:

[0008] A refrigeration unit, comprising a chassis and a liquid inlet pipe, an expansion valve, an evaporator, and a liquid outlet pipe connected in sequence, wherein the chassis forms a refrigeration space, the expansion valve and the evaporator are located in the refrigeration space, and the liquid inlet pipe and the liquid outlet pipe extend outward from the chassis;

[0009] An air supply unit includes a fan, an air supply duct, and multiple air supply nozzles. The fan is located in the cooling space. One end of the air supply duct is connected to the cooling space, and the other end extends outward from the cooling space. The fan blows air into the air supply duct. The multiple air supply nozzles are evenly distributed on the wall of the air supply duct. The opening degree and blowing angle of the air supply nozzles can be adjusted.

[0010] As an optional solution for the constant temperature air supply system, the air supply unit further includes an air supply temperature control component, which includes a first heating element connected to one end of the air supply duct near the fan.

[0011] As an optional solution for the constant temperature air supply system, the air supply temperature control component further includes a first temperature detection element, which is disposed in the air supply duct and is signal-connected to the first heating element.

[0012] As an optional solution for the constant temperature air supply system, the constant temperature air supply system further includes a defrosting assembly, which includes a second heating element connected to the evaporator.

[0013] As an optional solution for the constant temperature air supply system, the defrosting assembly also includes a second temperature detection element, which is disposed in the refrigeration space and is signal-connected to the second heating element.

[0014] As an optional solution for the constant temperature air supply system, the refrigeration unit further includes a refrigeration temperature control component, which includes a first control valve connected to the liquid outlet pipe.

[0015] As an optional solution for the constant temperature air supply system, the refrigeration temperature control component also includes a pressure detection element, which is connected to the liquid outlet pipe and located between the evaporator and the first control valve.

[0016] As an alternative to the constant temperature air supply system, the refrigeration unit further includes a second control valve, which is connected to the liquid inlet pipe.

[0017] As an alternative to the constant temperature air supply system, the constant temperature air supply system includes multiple refrigeration units, and the refrigeration space of the multiple refrigeration units is connected to the air supply duct.

[0018] Another objective of this invention is to provide a constant temperature storage device that can achieve uniform distribution of heat exchange airflow within the storage space and ensure temperature balance at various locations within the storage space.

[0019] To achieve this objective, the present invention adopts the following technical solution:

[0020] A constant temperature storage device is provided, including a housing, a third temperature sensing element, and the aforementioned constant temperature air supply system. The housing forms a storage space, the constant temperature air supply system is located in the storage space, the liquid inlet pipe and the liquid outlet pipe extend out of the housing, and multiple third temperature sensing elements are provided, which are spaced apart from each other in the storage space.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a constant temperature air supply system. Refrigerant flows through the inlet pipe to the expansion valve, causing it to become a low-temperature, low-pressure condensate. This low-temperature condensate passes through an evaporator, exchanging heat with the air in the cooling space. The refrigerant then flows out through the outlet pipe, lowering the temperature of the air in the cooling space, thus achieving a cooling effect. A fan transports the cold air from the cooling space to the air supply duct. The cold air in the duct flows outward through air supply nozzles. Multiple air supply nozzles are evenly distributed on the duct wall, allowing cold air to flow outward at multiple locations within the duct. Furthermore, the nozzles' opening and outlet angle can be adjusted to regulate the airflow volume and direction, ensuring uniform delivery of cold air.

[0023] This utility model also provides a constant temperature storage device. The outer shell can form a storage space for storing fruits and vegetables to be stored. The aforementioned constant temperature air supply system and multiple third temperature detection elements are also installed in the storage space. The constant temperature air supply system can provide cold air to the storage space. The multiple third temperature detection elements are installed at different positions in the storage space to monitor the temperature at different positions. By adjusting the opening and air outlet angle of the air supply nozzles, cold air can be delivered to different positions in the storage space, so that the cold air can be quickly delivered to the bottom of the cold storage through the gap between the shelf and the outer shell, so as to achieve uniform airflow distribution in the storage space and ensure temperature balance in the storage space. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the constant temperature air supply system provided by this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the constant temperature storage device provided by this utility model;

[0026] Figure 3 This is a side view of the internal structure of the constant temperature air supply system provided by this utility model.

[0027] In the picture:

[0028] 1. Refrigeration unit; 11. Chassis; 111. Refrigeration space; 112. Air inlet; 12. Liquid inlet pipe; 13. Expansion valve; 14. Evaporator; 15. Liquid outlet pipe; 16. Refrigeration temperature control assembly; 161. First control valve; 162. Pressure detection element; 17. Second control valve;

[0029] 2. Air supply unit; 21. Fan; 22. Air supply duct; 221. Main duct; 222. Branch duct; 23. Air supply nozzle; 24. Air supply temperature control assembly; 241. First heating element; 242. First temperature detection element;

[0030] 3. Defrosting assembly; 31. Second heating element; 32. Second temperature sensing element;

[0031] 100. Outer casing; 110. Storage space;

[0032] 200. Third temperature sensing element. Detailed Implementation

[0033] The present invention will now be described in further detail 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 not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] like Figures 1 to 3 As shown, the constant temperature air supply system of this embodiment includes a refrigeration unit 1 and an air supply unit 2. The refrigeration unit 1 includes a housing 11 and a liquid inlet pipe 12, an expansion valve 13, an evaporator 14, and a liquid outlet pipe 15 connected in sequence. The housing 11 forms a refrigeration space 111. The expansion valve 13 and the evaporator 14 are located in the refrigeration space 111. The liquid inlet pipe 12 and the liquid outlet pipe 15 extend outward from the housing 111. The air supply unit 2 includes a fan 21, an air supply duct 22, and multiple air supply nozzles 23. The fan 21 is located in the refrigeration space 111. One end of the air supply duct 22 is connected to the refrigeration space 111, and the other end extends outward from the refrigeration space 111. The fan 21 blows air into the air supply duct 22. The multiple air supply nozzles 23 are evenly distributed on the wall of the air supply duct 22. The opening degree and blowing angle of the air supply nozzles 23 can be adjusted.

[0038] Based on the above design, the refrigerant flows through the liquid inlet pipe 12 to the expansion valve 13, making the refrigerant a low-temperature, low-pressure condensate. The low-temperature condensate passes through the evaporator 14 and exchanges heat with the air in the cooling space 111. The refrigerant flows out from the liquid outlet pipe 15, and the temperature of the air in the cooling space 111 decreases, thereby achieving a cooling effect. The fan 21 can transport the cold air in the cooling space 111 to the air supply duct 22. The cold air in the air supply duct 22 flows outward through the air supply nozzles 23. Multiple air supply nozzles 23 are evenly distributed on the pipe wall of the air supply duct 22, so that the cold air can flow outward at multiple positions in the air supply duct 22. Furthermore, the opening degree and air outlet angle of the air supply nozzles 23 can be adjusted to adjust the air volume and air outlet direction, thereby achieving uniform delivery of cold air.

[0039] Furthermore, the refrigeration unit 1 also includes a second control valve 17, which is connected to the liquid inlet pipe 12. The second control valve 17 controls the opening and closing of the liquid inlet pipe 12 and regulates the refrigerant flow rate. Optionally, the second control valve 17 can be manually switched on and off; alternatively, a solenoid valve can also be used.

[0040] Furthermore, the refrigeration unit 1 also includes a refrigeration temperature control component 16, which includes a first control valve 161 connected to the liquid outlet pipe 15. By controlling the opening of the first control valve 161, the temperature of the evaporator 14 can be controlled, keeping the temperature of the evaporator 14 within a preset range, thus keeping the surface temperature of the evaporator 14 constant. This ensures that the heat transfer efficiency of the air in the refrigeration space 111 remains constant as it passes over the surface of the evaporator 14, causing the temperature of the air in the refrigeration space 111 to fluctuate within a preset range, thereby achieving a constant refrigeration temperature. In this embodiment, the first control valve 161 is configured as an electronic ball valve for easy control and adjustment. In some other embodiments, the first control valve 161 can also be a butterfly valve, gate valve, etc.

[0041] Optionally, the refrigeration temperature control assembly 16 further includes a pressure detection element 162. The pressure detection element 162 is connected to the liquid outlet pipe 15 and located between the evaporator 14 and the first control valve 161. The pressure detection element 162 is used to detect the pressure of the refrigerant in the liquid outlet pipe 15 to ensure the stability of the refrigerant pressure in the evaporator 14. Preferably, the pressure detection element 162 is signal-connected to the first control valve 161. The opening of the first control valve 161 is adjusted through the feedback of the pressure detection element 162 to regulate the pressure in the liquid outlet pipe 15. The first control valve 161 is controlled by a centralized or distributed controller, such as a microcontroller or PLC, to achieve intelligent control of the first control valve 161.

[0042] It should be noted that during prolonged use, frost easily forms on the surface of the low-temperature evaporator tube of the evaporator 14, affecting the cooling efficiency. Therefore, the constant temperature air supply system also includes a defrosting assembly 3, which includes a second heating element 31 connected to the evaporator 14. In this embodiment, the second heating element 31 can heat the evaporator 14 by hot gas defrosting or electric defrosting. To save energy, hot gas defrosting is used first to defrost the evaporator 14.

[0043] Optionally, the defrosting assembly 3 further includes a second temperature detection element 32, which is disposed in the refrigeration space 111 and is signal-connected to the second heating element 31. The second temperature detection element 32 is used to detect the temperature of the evaporator 14 to determine whether defrosting is required. In this embodiment, defrosting can be performed by manually or directly activating the second heating element 31. Specifically, the second temperature detection element 32 and the second heating element 31 are controlled by a PLC controller, and the defrosting time can be independently controlled to prevent excessively high defrosting temperatures from causing temperature fluctuations within the refrigeration space 111.

[0044] Furthermore, the air supply unit 2 also includes an air supply temperature control component 24, which includes a first heating element 241. The first heating element 241 is connected to the end of the air supply duct 22 near the fan 21. When the air temperature in the cooling space 111 is lower than the preset temperature, the first heating element 241 is turned on, so that the air delivered by the fan 21 is heated by the first heating element 241 and then delivered to the outside of the air supply duct 22, ensuring that the air supply temperature is always maintained within the set temperature range and reducing the fluctuation of the air supply temperature.

[0045] Optionally, the air supply temperature control assembly 24 further includes a first temperature detection element 242, which is disposed within the air supply duct 22. The first temperature detection element 242 is located at the rear end of the first heating element 241 in the airflow direction. The first temperature detection element 242 is signal-connected to the first heating element 241 and is used to detect the temperature of the cold air after it has been heated by the first heating element 241. The first heating element 241 can be adjusted in multiple levels or steplessly. The temperature of the first heating element 241 is adjusted based on the temperature feedback from the first temperature detection element 242 to prevent excessive temperature fluctuations during heating. In this embodiment, controlling the first heating element 241 with a PID controller ensures the stability, speed, and accuracy of the temperature control system, improves temperature control precision, and reduces energy consumption.

[0046] Preferably, the constant temperature air supply system includes multiple refrigeration units 1, and the refrigeration space 111 of the multiple refrigeration units 1 is connected to the air supply duct 22. This arrangement allows for the setting of different numbers of refrigeration units 1 according to actual usage requirements, ensuring the load capacity and service life of the constant temperature air supply system. Specifically, the air supply unit 2 includes multiple fans 21, and the air supply duct 22 includes a main duct 221 and multiple branch ducts 222. The multiple refrigeration units, multiple fans 21, and multiple branch ducts 222 correspond one-to-one. Each fan 21 is installed in a corresponding housing 11, each branch duct 222 is connected to a refrigeration unit 1, and each branch duct 222 is equipped with a corresponding air supply temperature control component 24. All branch ducts 222 are connected to the main duct 221, and air supply nozzles 23 are installed on the wall of the main duct 221. In this embodiment, two refrigeration units 1 are provided. In some other embodiments, three, four, etc., refrigeration units 1 may also be provided.

[0047] Furthermore, the chassis 11 is also provided with an air inlet 112, through which hot air from outside the chassis 11 enters the cooling space 111. The hot air exchanges heat with the evaporator 14 and is cooled to form cold air. The cold air flows into the air supply duct 22 under the action of the fan 21.

[0048] like Figures 1 to 3As shown, this embodiment also proposes a constant-temperature storage device, including a housing 100, a third temperature sensing element 200, and the aforementioned constant-temperature air supply system. The housing 100 forms a storage space 110, the constant-temperature air supply system is located in the storage space 110, and the liquid inlet pipe 12 and the liquid outlet pipe 15 extend out of the housing 100. Multiple third temperature sensing elements 200 are provided, and the multiple third temperature sensing elements 200 are spaced apart from each other within the storage space 110.

[0049] The constant temperature storage device provided in this embodiment has an outer shell 100 that forms a storage space 110. The storage space 110 is used to store fruits and vegetables to be stored. The aforementioned constant temperature air supply system and multiple third temperature detection elements 200 are also installed in the storage space 110. The constant temperature air supply system can provide cold air to the storage space 110. The multiple third temperature detection elements 200 are installed at different positions in the storage space 110 to monitor the temperature at different positions. By adjusting the opening and air outlet angle of the air supply nozzles 23, cold air can be delivered to different positions in the storage space 110, so that the cold air can be quickly delivered to various positions in the cold storage through the gap between the shelf and the outer shell 100, so as to achieve uniform airflow distribution in the storage space 110 and ensure temperature balance in the storage space 110.

[0050] Optionally, in this embodiment, both the outer casing 100 and the air supply duct 22 are made of food-grade stainless steel, which can meet food safety requirements and also serve as a corrosion protectant.

[0051] Optionally, at least four third temperature sensing elements 200 are provided, and the four third temperature sensing elements 200 are respectively located at the four corners of the storage space 110.

[0052] When the constant temperature storage device is working, the refrigerant stored outside the outer casing 100 passes through the inlet pipe 12, expansion valve 13, evaporator 14 and outlet pipe 15 in sequence to cool the air in the cooling space 111. The fan 21 delivers the cold air in the cooling space 111 to the storage space 110 through the air supply pipe 22 and multiple air supply nozzles 23. The cold air exchanges heat with the fruits and vegetables stored in the storage space 110, causing the temperature of the fruits and vegetables to drop. The cold air absorbs the heat from the fruits and vegetables and its temperature rises. It then returns to the cooling space 111 through the air inlet 112 of the casing 11 to continue to transfer heat with the evaporator 14, thereby achieving constant temperature control in the storage space 110.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A constant temperature air supply system, characterized in that, include: A refrigeration unit (1) includes a chassis (11) and a liquid inlet pipe (12), an expansion valve (13), an evaporator (14), and a liquid outlet pipe (15) connected in sequence. The chassis (11) forms a refrigeration space (111). The expansion valve (13) and the evaporator (14) are located in the refrigeration space (111). The liquid inlet pipe (12) and the liquid outlet pipe (15) extend outward from the chassis (11). An air supply unit (2) is provided, comprising a fan (21), an air supply duct (22), and multiple air supply nozzles (23). The fan (21) is located in the cooling space (111). One end of the air supply duct (22) is connected to the cooling space (111), and the other end extends outward from the cooling space (111). The fan (21) blows air into the air supply duct (22). Multiple air supply nozzles (23) are evenly distributed on the wall of the air supply duct (22). The opening degree and blowing angle of the air supply nozzles (23) can be adjusted.

2. The constant temperature air supply system according to claim 1, characterized in that, The air supply unit (2) further includes an air supply temperature control component (24), which includes a first heating element (241) connected to one end of the air supply duct (22) near the fan (21).

3. The constant temperature air supply system according to claim 2, characterized in that, The air supply temperature control assembly (24) further includes a first temperature detection element (242), which is disposed in the air supply duct (22) and is signal-connected to the first heating element (241).

4. The constant temperature air supply system according to claim 1, characterized in that, The constant temperature air supply system also includes a defrosting assembly (3), which includes a second heating element (31) connected to the evaporator (14).

5. The constant temperature air supply system according to claim 4, characterized in that, The defrosting assembly (3) further includes a second temperature detection element (32), which is disposed in the cooling space (111) and is signal-connected to the second heating element (31).

6. The constant temperature air supply system according to claim 1, characterized in that, The refrigeration unit (1) further includes a refrigeration temperature control component (16), which includes a first control valve (161) connected to the liquid outlet pipe (15).

7. The constant temperature air supply system according to claim 6, characterized in that, The refrigeration temperature control assembly (16) further includes a pressure detection element (162), which is connected to the liquid outlet pipe (15) and located between the evaporator (14) and the first control valve (161).

8. The constant temperature air supply system according to claim 1, characterized in that, The refrigeration unit (1) further includes a second control valve (17), which is connected to the liquid inlet pipe (12).

9. The constant temperature air supply system according to any one of claims 1-8, characterized in that, The constant temperature air supply system includes multiple refrigeration units (1), and the refrigeration space (111) of the multiple refrigeration units (1) is connected to the air supply duct (22).

10. A constant temperature storage device, characterized in that, The device includes a housing (100), a third temperature sensing element (200), and a constant temperature air supply system according to any one of claims 1-9. The housing (100) forms a storage space (110), the constant temperature air supply system is located in the storage space (110), the liquid inlet pipe (12) and the liquid outlet pipe (15) extend out of the housing (100), and multiple third temperature sensing elements (200) are provided, with the multiple third temperature sensing elements (200) arranged at intervals within the storage space (110).

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