Controlled atmosphere refrigeration device

Abstract

A controlled atmosphere cold storage device comprises a box body, a cold storage chamber is arranged in the box body, and the controlled atmosphere cold storage device is characterized by further comprising a refrigeration device used for controlling the temperature of the cold storage chamber, a nitrogen supply device used for supplying nitrogen to the cold storage chamber, a carbon dioxide supply device used for supplying carbon dioxide to the cold storage chamber and a control device used for executing instructions. The nitrogen supply device and the carbon dioxide supply device communicate with the refrigerating chamber. The modified atmosphere cold storage device is optimally designed on the basis of a vertical refrigerator, the gas cylinder, the gas monitoring sensor, the gas supply device, the humidifier and other key components are added on the basis of the vertical refrigerator, and the modified atmosphere refrigerator is obtained through optimization design. The refrigerator has the function of displaying parameters such as the temperature, the humidity, the oxygen concentration and the carbon dioxide concentration in the refrigerator, and a user can regulate and control the temperature, the humidity and the gas concentration in the refrigerator according to requirements and the display parameters, so that a proper environment is created for fruit and vegetable storage, and the fresh-keeping effect on fruits and vegetables is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of food preservation, in particular to an atmosphere-controlled refrigeration device. Background Art

[0002] In the current sales process of fruits and vegetables, retailers generally use room temperature and ordinary freezers for storage. Ordinary refrigerators can only perform simple temperature adjustments. Therefore, these two methods cannot keep fruits and vegetables fresh. As a result, a higher spoilage rate of fruits and vegetables will occur in the sales process, causing greater economic losses to merchants.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The utility model aims to provide a controlled atmosphere refrigeration device with simple and reasonable structure, good fresh-keeping effect, low spoilage rate of fruits and vegetables and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] An atmosphere-controlled refrigeration device designed for this purpose comprises a box body, in which a refrigerating chamber is arranged, and is characterized in that: it also comprises a refrigerating device for controlling the temperature of the refrigerating chamber, a nitrogen supply device for supplying nitrogen to the refrigerating chamber, a carbon dioxide supply device for supplying carbon dioxide to the refrigerating chamber, and a control device for executing instructions; the nitrogen supply device and the carbon dioxide supply device are respectively connected to the refrigerating chamber; the control device controls the connection of the refrigerating device, the nitrogen supply device and the carbon dioxide supply device respectively; the control device controls the start and stop of the refrigerating device, and the opening or closing of the nitrogen supply device and the carbon dioxide supply device according to the environmental parameters of the refrigerating chamber.

[0006] An oxygen concentration sensor for detecting the oxygen concentration in the refrigerating chamber and a carbon dioxide concentration sensor for detecting the carbon dioxide concentration in the refrigerating chamber are arranged in the refrigerating chamber; the control device is electrically connected to the oxygen concentration sensor and the carbon dioxide concentration sensor respectively, and the detection data of the oxygen concentration sensor and the carbon dioxide concentration sensor are fed back to the control device.

[0007] A first solenoid valve for opening or closing the nitrogen gas circuit and a first pressure reducing valve for relieving pressure on the nitrogen supply device are provided on the nitrogen gas circuit between the nitrogen supply device and the cold storage chamber, and a controller is provided on the control device, and the controller is electrically connected to the first solenoid valve; a second solenoid valve for opening or closing the carbon dioxide gas circuit and a second pressure reducing valve for relieving pressure on the carbon dioxide supply device are provided on the carbon dioxide gas circuit between the carbon dioxide supply device and the cold storage chamber, and the controller is connected to the second solenoid valve; the controller controls the opening or closing of the first solenoid valve and the second solenoid valve according to the environmental parameters of the cold storage chamber.

[0008] It also includes a humidifier for adjusting the humidity of the refrigerating chamber. The humidifier is connected to the refrigerating chamber. The control device controls the connection of the humidifier. The control device controls the operation of the humidifier according to the humidity of the refrigerating chamber.

[0009] A temperature and humidity sensor for detecting the temperature and humidity of the refrigerating chamber is provided in the refrigerating chamber, the control device is electrically connected to the temperature and humidity sensor, and the detection data of the temperature and humidity sensor is fed back to the control device; a temperature and humidity control panel for displaying temperature and humidity data and / or inputting temperature and humidity control instructions is provided on the box body, and the control device is electrically connected to the temperature and humidity control panel.

[0010] A main switch and a light switch are provided on the box body; the control device is electrically connected to the main switch and the power supply terminal respectively, and the main switch controls the power on and off; a lighting device is provided on the refrigerating chamber, and the control device is electrically connected to the lighting device and the light switch respectively, and the light switch controls the lighting device on and off.

[0011] The refrigeration device includes an evaporator. The chamber where the evaporator is located is connected to the humidifier through a condensate pipe. The condensate generated by the evaporator is transported to the humidifier through the condensate pipe to provide the humidifier with the required liquid.

[0012] The refrigeration device also includes a compressor, a condenser, a drying filter and a capillary tube; the compressor is connected to the evaporator and the condenser respectively, the condenser is connected to the evaporator through the capillary tube, the drying filter is connected between the condenser and the evaporator, and the evaporator is connected to the cold storage room; the control device controls the connection of the compressor, and the control device controls the start and stop of the compressor according to the environmental parameters of the cold storage room; an ethylene removal device for decomposing ethylene is arranged on the cold storage room.

[0013] A partition is arranged in the cold storage room, the partition is located below the evaporator, and the partition extends to the bottom of the cold storage room. The partition divides the cold storage room into an air duct room and a return air channel which are interconnected. The evaporator is connected to the air duct room and the return air channel respectively.

[0014] A number of shelves for placing fruits and vegetables are arranged in the cold storage room, and storage spaces for accommodating fruits and vegetables are formed between the shelves. The storage spaces are connected to each other, and a nitrogen supply device and / or a carbon dioxide supply device is connected to the storage spaces; the nitrogen supply device is a nitrogen cylinder, and the carbon dioxide supply device is a carbon dioxide cylinder.

[0015] The atmosphere-controlled refrigeration device of the utility model is optimized and designed based on a vertical freezer (refrigerator). Key components such as a gas cylinder, a gas monitoring sensor, a gas supply device, and a humidifier are added to the vertical freezer. The atmosphere-controlled freezer is optimized and designed to enable the freezer to have the function of displaying parameters such as temperature, humidity, oxygen concentration, and carbon dioxide concentration in the box. Users can adjust the temperature, humidity, and gas concentration in the box according to needs and displayed parameters, thereby creating a suitable environment for storing fruits and vegetables, improving the preservation effect of fruits and vegetables, and further achieving the effect of extending the shelf life of fruits and vegetables, thereby increasing the economic benefits of merchants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a controlled atmosphere refrigeration device in one embodiment of the utility model.

[0017] Figure 2 It is a cross-sectional view from another perspective of the atmosphere-controlled refrigeration device in one embodiment of the utility model.

[0018] Figure 3 It is a schematic diagram of the internal structure of a controlled atmosphere refrigeration device in one embodiment of the utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1-Figure 3 The present atmosphere-controlled refrigeration device comprises a box body 1, in which a refrigerating chamber 2 is arranged, and also comprises a refrigerating device 3 for controlling the temperature of the refrigerating chamber 2, a nitrogen supply device 5 for supplying nitrogen to the refrigerating chamber 2, a carbon dioxide supply device 6 for supplying carbon dioxide to the refrigerating chamber 2, and a control device 7 for executing instructions; the nitrogen supply device 5 and the carbon dioxide supply device 6 are respectively connected to the refrigerating chamber 2; the control device 7 controls the connection of the refrigerating device 3, the nitrogen supply device 5 and the carbon dioxide supply device 6 respectively; the control device 7 controls the start and stop of the refrigerating device 3, and the opening or closing of the nitrogen supply device 5 and the carbon dioxide supply device 6 according to the environmental parameters of the refrigerating chamber 2; the control device 7 is an electric control box, the refrigerating device 3 is arranged on the top of the box body 1, and the nitrogen supply device 5 and the carbon dioxide supply device 6 are arranged on the rear side of the box body 1 and are located outside the box body 1.

[0021] An oxygen concentration sensor 10 for detecting the oxygen concentration in the refrigerating chamber 2 and a carbon dioxide concentration sensor 11 for detecting the carbon dioxide concentration in the refrigerating chamber 2 are provided in the refrigerating chamber 2; the control device 7 is electrically connected to the oxygen concentration sensor 10 and the carbon dioxide concentration sensor 11, respectively, and the detection data of the oxygen concentration sensor 10 and the carbon dioxide concentration sensor 11 are fed back to the control device 7.

[0022] A first solenoid valve 13 for opening or closing the nitrogen gas path and a first pressure reducing valve 12 for relieving the pressure of the nitrogen supply device 5 are provided on the nitrogen gas path between the nitrogen supply device 5 and the cold storage chamber 2, and a controller is provided on the control device 7, and the controller is electrically connected to the first solenoid valve 13; a second solenoid valve 13' for opening or closing the carbon dioxide gas path and a second pressure reducing valve 12' for relieving the pressure of the carbon dioxide supply device 6 are provided on the carbon dioxide gas path between the carbon dioxide supply device 6 and the cold storage chamber 2, and the controller is electrically connected to the second solenoid valve 13'; the controller controls the opening or closing of the first solenoid valve 13 and the second solenoid valve 13' according to the environmental parameters of the cold storage chamber 2. When the oxygen and / or carbon dioxide concentration in the cold storage room 2 exceeds the set range, the control device 7 controls the first solenoid valve 13, the first pressure reducing valve 12 and / or the second solenoid valve 13', the second pressure reducing valve 12' to open. Specifically, after the oxygen concentration sensor 10 and the carbon dioxide concentration sensor 11 detect the oxygen concentration and carbon dioxide concentration in the cold storage room 2, the gas concentration in the cold storage room 2 is transmitted to the electric control box through signal transmission. The electric control box determines whether the gas concentration is within the set range. If it exceeds the set range, the corresponding first solenoid valve 13 and / or the second solenoid valve 13' is opened, and nitrogen and / or carbon dioxide are transmitted to the cold storage room 2 through the pipeline to adjust the gas concentration in the cold storage room 2; when the oxygen concentration in the cold storage room 2 is high, nitrogen is introduced into the cold storage room 2 to reduce the oxygen concentration, and when the carbon dioxide concentration in the cold storage room 2 is low, carbon dioxide is introduced into the cold storage room 2; when the gas concentration is within the set value interval, the corresponding solenoid valve remains closed; nitrogen is stable in nature and can reduce the oxygen concentration by excluding oxygen. Fruits and vegetables Oxidation and respiration, Carbon dioxide helps reduce Aerobic respiration of fruits and vegetables, slowing down the fruit ripening cycle.

[0023] It also includes a humidifier 4 for adjusting the humidity of the refrigerating chamber 2. The humidifier 4 is connected to the refrigerating chamber 2 and is arranged at the bottom of the refrigerating chamber 2. The control device 7 controls the connection of the humidifier 4. The control device 7 controls the operation of the humidifier 4 according to the humidity of the refrigerating chamber 2.

[0024] A temperature and humidity sensor 8 for detecting the temperature and humidity of the refrigerating chamber 2 is arranged in the refrigerating chamber 2, and the control device 7 is electrically connected to the temperature and humidity sensor 8, and the detection data of the temperature and humidity sensor 8 is fed back to the control device 7; a temperature and humidity control panel 9 for displaying temperature and humidity data and / or inputting temperature and humidity control instructions is arranged on the box body 1, and the control device 7 is electrically connected to the temperature and humidity control panel 9; the user can set the temperature and humidity in the refrigerating chamber 2 through the temperature and humidity control panel 9 according to different fruit and vegetable storage temperatures and humidity. When the temperature and humidity sensor 8 detects that the temperature in the refrigerating chamber 2 reaches the set temperature lower limit, the refrigeration device 3 (compressor 16) stops working and refrigeration is suspended. On the contrary, when the temperature in the refrigerating chamber 2 exceeds the temperature upper limit, the refrigeration device 3 is turned on and refrigeration starts; when the temperature and humidity sensor 8 detects that the relative humidity in the refrigerating chamber 2 reaches the set relative humidity lower limit, the humidifier 4 starts working, and when the temperature and humidity sensor 8 detects that the relative humidity in the refrigerating chamber 2 exceeds the set relative humidity upper limit, the humidifier 4 stops working.

[0025] A main switch 24 and a light switch 25 are provided on the box body 1; the control device 7 is electrically connected to the main switch 24 and the power supply terminal respectively, and the main switch 24 controls the power on and off; a lighting device is provided on the top of the cold storage room 2, and the control device 7 is electrically connected to the lighting device and the light switch 25 respectively, and the light switch 25 controls the lighting device switch, and the lighting device is a lighting lamp.

[0026] The refrigeration device 3 includes an evaporator 17 . The chamber where the evaporator 17 is located is connected to the humidifier 4 via a condensed water pipe 19 . The condensed water generated by the evaporator 17 is transported to the humidifier 4 via the condensed water pipe 19 to provide the humidifier 4 with the required liquid.

[0027] The refrigeration device 3 further includes a compressor 16, a condenser 18, a filter dryer 21 and a capillary tube 20; the compressor 16 is connected to the evaporator 17 and the condenser 18 respectively, the condenser 18 is connected to the evaporator 17 through the capillary tube 20, the filter dryer 21 is connected between the condenser 18 and the evaporator 17, and the evaporator 17 is connected to the refrigeration chamber 2; the control device 7 controls the connection of the compressor 16, and the control device 7 controls the start and stop of the compressor 16 according to the environmental parameters of the refrigeration chamber 2; the filter dryer 21 is used to filter impurities in the refrigeration device 3, such as metal chips, oxides and dust, so as to prevent these impurities from clogging the capillary tube 2 0 or damage to the compressor 16. In addition, the drying filter 21 can also absorb the residual moisture in the refrigeration device 3 to prevent ice blockage and reduce the corrosion of moisture to the refrigeration device 3. The working process of the refrigeration device 3: the high-temperature and high-pressure refrigerant flows through the condenser 18 to release heat, and then the refrigerant enters the drying filter 21, and then enters the capillary 20 for throttling, and then enters the evaporator 17 in the cold storage room 2; the refrigerant flow direction is: compressor 16→condenser 18→drying filter 21→capillary 20→evaporator 17→compressor 16; the principle of the refrigeration device 3 is the same as that of the refrigerator refrigeration system.

[0028] The refrigerating chamber 2 is provided with an ethylene removal device 22 for decomposing ethylene. The ethylene removal device 22 is used to remove ethylene produced by fruits and vegetables in the refrigerating chamber 2 to prevent ethylene from ripening the fruits.

[0029] A partition 26 is provided in the refrigerating chamber 2. The partition 26 is located below the evaporator 17 and extends to the bottom of the refrigerating chamber 2. The partition 26 divides the refrigerating chamber 2 into an air duct chamber 27 and a return air duct 28 that are interconnected. The evaporator 17 is connected to the air duct chamber 27 and the return air duct 28 respectively. Figure 1 As shown by the arrow, the cold air blown out from the evaporator 17 enters the air duct chamber 27. After reaching the bottom of the cold storage room 2, the cold air flows back to the evaporator 17 through the return air channel 28, and the cycle continues. The partition 26 can guide the cold air to the bottom of the cold storage room 2 to prevent the cold air from returning directly to the evaporator 17 without passing through the bottom of the cold storage room 2, resulting in a high temperature at the bottom of the cold storage room 2.

[0030] A plurality of shelves 23 for placing fruits and vegetables are arranged in the cold storage chamber 2, and storage spaces for accommodating fruits and vegetables are formed between the shelves 23 and the shelves 23, and the storage spaces are connected to each other, and the nitrogen supply device 5 and / or the carbon dioxide supply device 6 are connected to the storage spaces; the nitrogen supply device 5 is a high-pressure nitrogen cylinder, and the carbon dioxide supply device 6 is a high-pressure carbon dioxide cylinder. The target gas is stored in the high-pressure nitrogen cylinder and the high-pressure carbon dioxide cylinder, which has the advantages of convenient and fast replacement and strong mobility; the pressure reducing valve is used to reduce the pressure of the gas in the high-pressure gas storage cylinder (high-pressure nitrogen cylinder or high-pressure carbon dioxide cylinder) and release it into the cold storage chamber 2.

[0031] A first air inlet 14 and a second air inlet 15 are provided on the refrigerating chamber 2, the nitrogen supply device 5 is connected to the refrigerating chamber 2 through the first air inlet 14, and the carbon dioxide supply device 6 is connected to the refrigerating chamber 2 through the second air inlet 15; the nitrogen supply device 5 is connected to the first air inlet 14 through a pipeline, and the carbon dioxide supply device 6 is connected to the second air inlet 15 through a pipeline.

[0032] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A controlled atmosphere refrigeration device, comprising a box body (1), wherein a refrigeration chamber (2) is arranged in the box body (1), characterized in that: The refrigerator also comprises a refrigeration device (3) for controlling the temperature of the refrigeration chamber (2), a nitrogen supply device (5) for supplying nitrogen to the refrigeration chamber (2), a carbon dioxide supply device (6) for supplying carbon dioxide to the refrigeration chamber (2), and a control device (7) for executing instructions; the nitrogen supply device (5) and the carbon dioxide supply device (6) are respectively connected to the refrigeration chamber (2); the control device (7) controls the connection of the refrigeration device (3), the nitrogen supply device (5) and the carbon dioxide supply device (6) respectively; the control device (7) controls the start and stop of the refrigeration device (3) and the opening or closing of the nitrogen supply device (5) and the carbon dioxide supply device (6) according to the environmental parameters of the refrigeration chamber (2).

2. The controlled atmosphere refrigeration device according to claim 1, characterized in that: An oxygen concentration sensor (10) for detecting the oxygen concentration in the refrigerating chamber (2) and a carbon dioxide concentration sensor (11) for detecting the carbon dioxide concentration in the refrigerating chamber (2) are arranged in the refrigerating chamber (2); the control device (7) is electrically connected to the oxygen concentration sensor (10) and the carbon dioxide concentration sensor (11), respectively, and detection data of the oxygen concentration sensor (10) and the carbon dioxide concentration sensor (11) are fed back to the control device (7).

3. The controlled atmosphere refrigeration device according to claim 1, characterized in that: A first solenoid valve (13) for opening or closing the nitrogen gas path and a first pressure reducing valve (12) for relieving pressure on the nitrogen gas supply device (5) are provided on the nitrogen gas path between the nitrogen supply device (5) and the refrigerating chamber (2); a controller is provided on the control device (7); the controller is electrically connected to the first solenoid valve (13); a second solenoid valve (13') for opening or closing the carbon dioxide gas path and a second pressure reducing valve (12') for relieving pressure on the carbon dioxide supply device (6) are provided on the carbon dioxide gas path between the carbon dioxide supply device (6) and the refrigerating chamber (2); the controller is electrically connected to the second solenoid valve (13'); the controller controls the opening or closing of the first solenoid valve (13) and the second solenoid valve (13') according to environmental parameters of the refrigerating chamber (2).

4. The controlled atmosphere refrigeration device according to claim 1, characterized in that: It also includes a humidifier (4) for adjusting the humidity of the refrigerating chamber (2); the humidifier (4) is connected to the refrigerating chamber (2); the control device (7) controls the connection to the humidifier (4); and the control device (7) controls the operation of the humidifier (4) according to the humidity of the refrigerating chamber (2).

5. The controlled atmosphere refrigeration device according to claim 4, characterized in that: A temperature and humidity sensor (8) for detecting the temperature and humidity of the refrigerating chamber (2) is arranged in the refrigerating chamber (2); the control device (7) is electrically connected to the temperature and humidity sensor (8); and detection data of the temperature and humidity sensor (8) is fed back to the control device (7); a temperature and humidity control panel (9) for displaying temperature and humidity data and / or inputting temperature and humidity control instructions is arranged on the box body (1); and the control device (7) is electrically connected to the temperature and humidity control panel (9).

6. The controlled atmosphere refrigeration device according to claim 5, characterized in that: The box body (1) is provided with a main switch (24) and a light switch (25); the control device (7) is electrically connected to the main switch (24) and the power supply terminal, and the main switch (24) controls the on and off of the power supply; the cold storage room (2) is provided with a lighting device, the control device (7) is electrically connected to the lighting device and the light switch (25), and the light switch (25) controls the lighting device to be turned on and off.

7. The controlled atmosphere refrigeration device according to claim 4, characterized in that: The refrigeration device (3) comprises an evaporator (17); a chamber in which the evaporator (17) is located is connected to the humidifier (4) via a condensed water pipe (19); condensed water generated by the operation of the evaporator (17) is transported to the humidifier (4) via the condensed water pipe (19), thereby providing the humidifier (4) with required liquid.

8. The controlled atmosphere refrigeration device according to claim 7, characterized in that: The refrigeration device (3) further comprises a compressor (16), a condenser (18), a drying filter (21) and a capillary tube (20); the compressor (16) is connected to the evaporator (17) and the condenser (18) respectively, the condenser (18) is connected to the evaporator (17) via the capillary tube (20), the drying filter (21) is connected between the condenser (18) and the evaporator (17), and the evaporator (17) is connected to the refrigeration chamber (2); the control device (7) controls the connection to the compressor (16), and the control device (7) controls the start and stop of the compressor (16) according to the environmental parameters of the refrigeration chamber (2); and an ethylene removal device (22) for decomposing ethylene is provided on the refrigeration chamber (2).

9. The controlled atmosphere refrigeration device according to claim 7, characterized in that: A partition (26) is provided in the refrigerating chamber (2). The partition (26) is located below the evaporator (17) and extends to the bottom of the refrigerating chamber (2). The partition (26) divides the refrigerating chamber (2) into an air duct chamber (27) and a return air duct (28) that are interconnected. The evaporator (17) is respectively connected to the air duct chamber (27) and the return air duct (28).

10. The controlled atmosphere refrigeration device according to any one of claims 1 to 9, characterized in that: A plurality of shelves (23) for placing fruits and vegetables are arranged in the refrigerating chamber (2); a storage space for accommodating fruits and vegetables is formed between the shelves (23); the storage spaces are connected to each other; a nitrogen supply device (5) and / or a carbon dioxide supply device (6) are connected to the storage space; the nitrogen supply device (5) is a nitrogen cylinder, and the carbon dioxide supply device (6) is a carbon dioxide cylinder.

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