Low-temperature gas regulation preservation device for short-term preservation of vegetables

Abstract

The utility model relates to the technical field of fresh-keeping equipment, in particular to a low-temperature gas adjusting and preserving device for short-term fresh-keeping of vegetables. Comprising a freezer body and a gas adjusting mechanism, the gas adjusting mechanism comprises gas supply equipment, detection equipment and humidification equipment, the gas supply equipment is used for supplying fresh-keeping gas into the freezer body, the detection equipment is used for detecting the content, temperature and humidity of the fresh-keeping gas in the freezer body, and the humidification equipment is used for adjusting the humidity in the freezer body; a partition plate is fixed to the inner top face of the cabinet body, a gap exists between the lower end of the partition plate and the inner bottom face of the cabinet body, the upper end of the cabinet body is communicated with an air inlet pipe and an air outlet pipe, and the communicating position of the air inlet pipe and the cabinet body and the communicating position of the air outlet pipe and the cabinet body are located on the two sides of the partition plate respectively. And the air inlet end of the air supply equipment is communicated with the air outlet pipe. The gas supply equipment introduces gas into the cabinet body, and the concentration of mixed gas at each position in the cabinet body is basically kept consistent, so that the fresh-keeping effect of the cabinet body on vegetables is improved.

Description

Technical Field

[0001] This utility model relates to the field of preservation equipment technology, and in particular to a low-temperature gas conditioning preservation device for short-term preservation of vegetables. Background Technology

[0002] As living standards improve, people are paying more and more attention to food quality and food safety, especially for vegetables, which are in high demand but perishable. To extend the shelf life and freshness of vegetables, they are usually refrigerated at low temperatures.

[0003] For example, the utility model patent with authorization publication number CN221330041U discloses a low-temperature gas regulation preservation device for short-term preservation of meat. It obtains a gas with specific components through a mixing chamber, and then introduces it into the freezer to change the content of carbon dioxide and oxygen in the air inside the freezer, thereby achieving the effect of maintaining the color and freshness of meat in a short period of time.

[0004] In the aforementioned low-temperature gas conditioning and preservation device for short-term meat preservation, the gas in the mixing chamber is directly drawn into the freezer through the first fan and the exhaust pipe. Then, the exhaust pipe is set up to extract the gas from the freezer and re-enter the mixing chamber through the circulation pipe to achieve the gas circulation effect.

[0005] In this device, both the extraction and exhaust pipes are located on the lower side of the freezer. The gas extracted into the freezer diffuses randomly throughout the freezer, resulting in the lower layer of the freezer always having a higher gas concentration and the upper layer always having a lower gas concentration. At the same time, the gas concentrations in the upper and lower layers of the freezer are inconsistent, resulting in poor vegetable preservation. Summary of the Invention

[0006] To address the problem of inconsistent gas concentrations between the upper and lower compartments of existing gas-conditioned storage devices, resulting in poor vegetable preservation, this invention proposes a low-temperature gas-conditioned storage device for short-term vegetable preservation. The gas supply device introduces a mixed preservative gas into the cabinet through an air inlet pipe, ensuring that the concentration of the mixed gas remains relatively consistent throughout the cabinet, thereby improving the preservation effect of the cabinet on vegetables.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A low-temperature gas-conditioned preservation device for short-term vegetable preservation includes a freezer body with a door on the side and a gas conditioning mechanism. The gas conditioning mechanism includes a gas supply device, a detection device, and a humidification device. The gas supply device supplies preservative gas into the freezer body. The detection device detects the content of the preservative gas, temperature, and humidity inside the freezer body. The humidification device regulates the humidity inside the freezer body. A partition board is fixed to the top surface of the freezer body, with a gap between the lower end of the partition board and the bottom surface of the freezer body. An inlet pipe and an outlet pipe are connected to the upper end of the freezer body. The connection points between the inlet pipe and the freezer body and the outlet pipe and the freezer body are located on opposite sides of the partition board. The outlet end of the gas supply device is connected to the inlet pipe, and the inlet end of the gas supply device is connected to the outlet pipe. The partition board fixed to the top surface of the freezer body makes the internal space of the freezer body U-shaped.

[0009] Furthermore, the gas supply equipment includes an oxygen cylinder, a carbon dioxide cylinder, and a mixing chamber. The oxygen cylinder is connected to the mixing chamber via a pipe, and the carbon dioxide cylinder is also connected to the mixing chamber via a pipe. A mixed gas delivery pipe is connected to the mixing chamber, and the mixed gas delivery pipe is connected to the air inlet pipe. Oxygen inhibits the growth of anaerobic bacteria in the cabinet, ensuring aerobic respiration of the vegetables and delaying their aging process. Carbon dioxide can inhibit the growth of most bacteria and molds, extending the shelf life of the vegetables.

[0010] The detection equipment includes a detection box, which contains a temperature and humidity sensor, an oxygen concentration detector, and a carbon dioxide concentration detector. A first fan is installed on one side of the detection box, and an exhaust pipe is connected to the air inlet of the first fan. The exhaust pipe is connected to the air outlet pipe. A circulation pipe connected to a mixing box is also connected to the detection box.

[0011] Furthermore, the humidification device includes a water tank, a mist generator inside the water tank, and a second fan. The second fan is located on the top of the water tank, and a humidification pipe is connected to the air outlet of the second fan. The humidification pipe is connected to an air inlet. An air inlet is provided on the top of the water tank. The mist generator and the second fan introduce water mist into the air inlet to prevent the vegetables from losing too much moisture and to ensure the freshness of the vegetables.

[0012] Furthermore, the cabinet is equipped with an ultraviolet lamp.

[0013] Furthermore, the bottom of the cabinet is equipped with casters.

[0014] The beneficial effects of this utility model through the above technical solution are as follows:

[0015] 1. The gas supply device in this utility model introduces gas into the cabinet through the air inlet pipe. The partition plate fixed on the top surface of the cabinet makes the internal space of the cabinet concave. The gas introduced into the cabinet first moves downward and then upward to the air outlet pipe, and then enters the air inlet of the gas supply device to achieve circulation. During the circulation process, the concentration of mixed gas in various positions inside the cabinet is basically the same, which improves the preservation effect of the cabinet on vegetables.

[0016] 2. Compared with existing refrigerators, this invention does not require a long-term supply of oxygen and carbon dioxide gas. Once the concentration reaches a certain level, the gas in the cabinet circulates repeatedly. It only needs to supply gas again when the concentration of the mixed gas drops to a certain level, thus saving costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a low-temperature gas conditioning preservation device for short-term preservation of vegetables according to the present invention.

[0018] Figure 2 This is a front view of the hidden cabinet door of a low-temperature gas-conditioning preservation device for short-term preservation of vegetables according to this utility model.

[0019] Figure 3 This is a partial structural diagram of the hidden cabinet door of a low-temperature gas conditioning preservation device for short-term preservation of vegetables according to this utility model.

[0020] Figure 4 This is a schematic diagram of the internal gas flow direction of a low-temperature gas conditioning and preservation device for short-term preservation of vegetables according to this utility model.

[0021] In the attached diagram, the following numbers are used: 1 is the cabinet door, 2 is the cabinet body, 3 is the partition board, 4 is the air inlet pipe, 5 is the air outlet pipe, 6 is the oxygen cylinder, 7 is the carbon dioxide cylinder, 8 is the mixing box, 9 is the mixed gas delivery pipe, 10 is the detection box, 11 is the first fan, 12 is the exhaust pipe, 13 is the circulation pipe, 14 is the water tank, 15 is the second fan, 16 is the humidification pipe, 17 is the caster wheel, and 18 is the baffle. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] like Figures 1-4 As shown, this embodiment provides a low-temperature gas-conditioning preservation device for short-term preservation of vegetables, including a freezer body 2 with a cabinet door 1 on the side and a gas conditioning mechanism. The gas conditioning mechanism includes a gas supply device, a detection device and a humidification device. The gas supply device is used to supply preservation gas to the freezer body 2. The detection device is used to detect the content of preservation gas, temperature and humidity in the freezer body 2. The humidification device is used to adjust the humidity in the freezer body 2.

[0024] A partition plate 3 is fixed to the inner top surface of the cabinet 2. There is a gap between the lower end of the partition plate 3 and the inner bottom surface of the cabinet 2. An air inlet pipe 4 and an air outlet pipe 5 are connected to the upper end of the cabinet 2. The connection between the air inlet pipe 4 and the cabinet 2 and the connection between the air outlet pipe 5 and the cabinet 2 are respectively located on both sides of the partition plate 3. In this embodiment, the upper end of the partition plate 3 is fixed to the inner top surface of the cabinet 2. The side of the partition plate 3 near the cabinet 2 is fixedly connected to the inner side of the cabinet 2. The partition plate 3 makes the space inside the cabinet 2 U-shaped.

[0025] In this embodiment, the gas supply equipment includes an oxygen cylinder 6, a carbon dioxide cylinder 7, and a mixing tank 8. The oxygen cylinder 6 is connected to the mixing tank 8 through a pipe, and the carbon dioxide cylinder 7 is connected to the mixing tank 8 through a pipe. A mixed gas delivery pipe 9 is connected to the mixing tank 8, and the mixed gas delivery pipe 9 is connected to the air inlet pipe 4. Both the oxygen cylinder 6 and the carbon dioxide cylinder 7 are equipped with cylinder valves.

[0026] The testing equipment includes a testing chamber 10, which contains a temperature and humidity sensor, an oxygen concentration detector, and a carbon dioxide concentration detector. The temperature and humidity sensor can be a Zhaotaisheng ZTS-3008-WS-N01 carbon dioxide concentration detector, which can detect the temperature and humidity of the gas inside the extraction cabinet 2. The oxygen concentration detector is an Aosong AO-09 oxygen concentration detector, which detects the oxygen content in the gas drawn into the testing chamber 10. The carbon dioxide concentration detector can be a Prisendu PR-3002-CO2-N01 carbon dioxide concentration detector, which detects the carbon dioxide content in the gas drawn into the testing chamber 10.

[0027] A first fan 11 is provided on one side of the test box 10, and an air duct is connected to one side of the test box 10. The end of the air duct is connected to the air outlet of the first fan 11. An air extraction pipe 12 is connected to the air inlet of the first fan 11. The air extraction pipe 12 is connected to the air outlet pipe 5. A circulation pipe 13 connected to the mixing box 8 is also connected to the test box 10.

[0028] The humidification equipment includes a water tank 14, a mist generator inside the water tank 14, and a second fan 15. The second fan 15 is located on top of the water tank 14, and an air duct is connected to the top of the water tank 14. The upper end of the air duct is connected to the second fan 15, and a humidification pipe 16 is connected to the air outlet of the second fan 15. The humidification pipe 16 is connected to the air inlet pipe 4. An air inlet is provided on the top of the water tank 14. During the process of the second fan 15 drawing water mist outward, outside air enters the water tank 14 through the air inlet. Both the first fan 11 and the second fan 15 are CXJF-50MM duct fans from Henan Xiayi County Super Cyclone Electronic Technology Co., Ltd.

[0029] It should be understood that in this embodiment, the oxygen cylinder 6, carbon dioxide cylinder 7, mixing chamber 8, detection chamber 10, and water tank 14 are placed at the top of the cabinet 2 and protected by a baffle 18. In other embodiments, the oxygen cylinder 6, carbon dioxide cylinder 7, mixing chamber 8, detection chamber 10, and water tank 14 can be placed on one side of the cabinet 2, and the connecting pipes therein can be adapted for connection.

[0030] The outlet of the gas supply device is connected to the inlet pipe 4, and the inlet of the gas supply device is connected to the outlet pipe 5. In this embodiment, the gas circulation process is as follows: oxygen and carbon dioxide enter the mixing chamber 8, mix, and then flow to the mixed gas delivery pipe 9, then through the inlet pipe 4 into the cabinet 2. Within the cabinet 2, the mixture moves downwards and lands on the lower side of the partition plate 3, then moves to the right and upwards, passing through the outlet pipe 5 and the extraction pipe 12 before entering the detection chamber 10. Finally, it passes through 13 into the mixing chamber 8, completing one cycle. During this process, the power source for the flow of the mixed gas is the first fan 11.

[0031] In this embodiment, the cylinder valves, temperature and humidity sensors, oxygen concentration detectors, carbon dioxide concentration detectors, and foggers on oxygen cylinder 6 and carbon dioxide cylinder 7 are all connected to the PLC controller via wires. The PLC controller can be a Wuxi Xinjie Electric Co., Ltd. model XD5-60T10-E PLC controller.

[0032] The cabinet 2 is equipped with ultraviolet lamps inside to sterilize and disinfect the surface of the vegetables. The bottom of the cabinet 2 is equipped with casters 17.

[0033] The working principle of this utility model is as follows: The concentration of carbon dioxide and oxygen, as well as the temperature and humidity, are set in the cabinet 2 using a PLC controller. The carbon dioxide content is set to above 10%, and the oxygen concentration is set to above 30%. The first fan 11 is started and the cylinder valves at the top of the oxygen cylinder 6 and carbon dioxide cylinder 7 are opened. Oxygen is transported to the mixing box 8 through a pipeline, and carbon dioxide is transported to the mixing box 8 through a pipeline. Then, the carbon dioxide and oxygen mixture is transported to the cabinet 2 through the mixed gas delivery pipe 9 and the inlet pipe 4. It moves downward in the cabinet 2 and falls on the lower side of the partition plate 3. Then it moves to the right and then upward, passing through the outlet pipe 5 and the exhaust pipe 12 before entering the detection box 10, thus adjusting the oxygen and carbon dioxide content in the cabinet 2.

[0034] The first fan 11 draws the gas from the cabinet 2 into the detection chamber 10 through the exhaust pipe 5 and the extraction pipe 12. The temperature and humidity sensor detects the temperature and humidity of the gas, the oxygen concentration detector detects the oxygen content in the gas, and the carbon dioxide concentration detector detects the carbon dioxide content in the gas. When the temperature and humidity sensor detects that the temperature and humidity of the gas have not reached the set value, it feeds the signal back to the PLC controller. The PLC controller controls the second fan 15 and the fogger to turn on. The fogger produces water mist, and the second fan 15 delivers the water mist through the humidification pipe 16 to the air inlet pipe 4, where it enters the cabinet 2 along with the oxygen and carbon dioxide. Then, the gas circulation proceeds according to the above gas circulation process. During this process, the first fan 11 provides power to realize the reciprocating circulation of the gas and is generally not turned off. When the temperature, humidity and mixed gas concentration on the fogger, the second fan 15, the oxygen cylinder 6 and the carbon dioxide cylinder 7 reach the set value, the PLC controller controls them to close.

[0035] Compared to existing utility model patents such as CN221330041U, which suffer from inconsistent gas concentrations between upper and lower layers in freezers, resulting in poor preservation, and the waste of materials due to the need to constantly open the valves on oxygen cylinders 6 and carbon dioxide cylinders 7, this utility model features a partition plate 3 fixed to the top surface of the cabinet body 2, making the internal space of the cabinet body 2 U-shaped. The gas entering the cabinet body first moves downwards and then upwards to the outlet pipe, and then enters the inlet of the gas supply equipment to achieve circulation. During the circulation process, the concentration of the mixed gas in various positions inside the cabinet body 2 remains basically consistent. At the same time, it does not require a long-term supply of oxygen and carbon dioxide gas. After the concentration reaches a certain level, the gas in the cabinet body 2 circulates repeatedly, and only needs to be supplied again when the mixed gas concentration drops to a certain level, thus saving costs.

[0036] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A low-temperature gas-adjusting preservation device for short-term preservation of vegetables, comprising a freezer cabinet body (2) provided with a cabinet door (1) on the side face and a gas-adjusting mechanism, the gas-adjusting mechanism comprising a gas supply device, a detection device and a humidifying device, the gas supply device being used to provide a preservation gas into the cabinet body (2), the detection device being used to detect the content, temperature and humidity of the preservation gas in the cabinet body (2), and the humidifying device being used to adjust the humidity in the cabinet body (2), characterized in that: a partition plate (3) is fixed to the top face in the cabinet body (2), and a gap exists between the lower end of the partition plate (3) and the bottom face in the cabinet body (2), and the upper end of the cabinet body (2) is communicated with an air inlet pipe (4) and an air outlet pipe (5), and the communication part of the air inlet pipe (4) with the cabinet body (2) and the communication part of the air outlet pipe (5) with the cabinet body (2) are located on the two sides of the partition plate (3), respectively. The air outlet end of the gas supply device is communicated with the air inlet pipe (4), and the air inlet end of the gas supply device is communicated with the air outlet pipe (5). The gas supply device comprises an oxygen cylinder (6), a carbon dioxide cylinder (7) and a mixing box (8), the oxygen cylinder (6) is communicated with the mixing box (8) through a pipeline, the carbon dioxide cylinder (7) is communicated with the mixing box (8) through a pipeline, and the mixing box (8) is communicated with a mixed gas delivery pipe (9) on it, and the mixed gas delivery pipe (9) is communicated with the air inlet pipe (4).

2. The low temperature gaseous conditioning storage device for short-term preservation of vegetables according to claim 1, characterized in that: The detection device comprises a detection box (10), and the detection box (10) is provided with a temperature and humidity sensor, an oxygen concentration detector and a carbon dioxide concentration detector, a first fan (11) is arranged on one side of the detection box (10), an air exhaust pipeline (12) is connected to the air inlet of the first fan (11), the air exhaust pipeline (12) is communicated with the air outlet pipe (5), and a circulation pipeline (13) connected with the mixing box (8) is further communicated with the detection box (10). The humidifying device comprises a water tank (14), a fog maker inside the water tank (14) and a second fan (15), the second fan (15) is arranged on the top of the water tank (14), a humidifying pipeline (16) is communicated with the air outlet of the second fan (15), the humidifying pipeline (16) is communicated with the air inlet pipe (4), and an air inlet is formed on the top of the water tank (14).

3. The low temperature gaseous conditioning storage device for short-term preservation of vegetables according to claim 1, characterized in that: The cabinet body (2) is provided with an ultraviolet lamp inside.

4. The low temperature gaseous conditioning storage device for short-term preservation of vegetables according to claim 1, characterized in that: The bottom end of the cabinet body (2) is provided with universal wheels (17).

5. The low temperature gaseous conditioning storage device for short-term preservation of vegetables according to claim 1, characterized in that: ​

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