A storage device for preventing oxidation of vegetable oil

Abstract

The utility model discloses a kind of storage devices for preventing vegetable oil oxidation.The device includes tank, tank is equipped with oil inlet pipe and oil outlet pipe, oil inlet pipe and oil outlet pipe are equipped with oil inlet valve and oil outlet valve respectively, the top of tank is connected with breather valve and nitrogen charging device, first valve is connected between nitrogen charging device and tank, the outside of tank is wound with temperature regulating pipe, temperature regulating pipe is connected with temperature regulating box, temperature regulating box is used to send temperature regulating medium to temperature regulating pipe.The utility model is provided with temperature regulating pipe on the outside of tank, cold water is provided to temperature regulating pipe using temperature regulating box, when the temperature of vegetable oil in tank is higher than set threshold, cooling is carried out, so that the temperature of vegetable oil is maintained in lower range, and the oxidation efficiency of vegetable oil is reduced;And before filling nitrogen, air in the cavity of the top of tank is extracted by setting air extractor, then nitrogen is filled again, the air content in cavity is greatly reduced, and oxidation of vegetable oil during storage in tank can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of storage devices for preventing the oxidation of vegetable oils, and specifically to a storage device for preventing the oxidation of vegetable oils. Background Technology

[0002] Vegetable oils are oils obtained from the fruits, seeds, and germs of plants, such as peanut oil, soybean oil, flaxseed oil, castor oil, and rapeseed oil. During storage, vegetable oils are prone to oxidative rancidity due to various factors, which not only produces unpleasant odors and alters their taste but may also generate substances harmful to the human body.

[0003] Utility model patent CN213736843U discloses an edible vegetable oil storage tank. It uses a multi-bend serpentine pipe connecting the breather valve and the tank body to prevent excessive nitrogen evaporation within the tank. A thermometer is also included to monitor the temperature inside the tank, allowing staff to check the actual temperature in real time or for the temperature detector to automatically issue warnings when the ambient temperature changes significantly. However, it does not solve the problem of vegetable oil oxidation caused by excessively high storage temperatures, so the anti-oxidation effect is not optimal. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a storage device for preventing the oxidation of vegetable oils.

[0005] To achieve the above objectives, this utility model provides a storage device for preventing the oxidation of vegetable oil, comprising a tank body, an oil inlet pipe and an oil outlet pipe provided on the tank body, an oil inlet valve and an oil outlet valve respectively provided on the oil inlet pipe and the oil outlet pipe, a breather valve and a nitrogen filling device connected to the top of the tank body, a first valve connected between the nitrogen filling device and the tank body, a temperature regulating pipe wrapped around the outside of the tank body, the temperature regulating pipe being connected to a temperature regulating box, and the temperature regulating box being used to deliver a temperature regulating medium into the temperature regulating pipe.

[0006] Furthermore, the temperature control box includes a compressor, the outlet of the compressor is connected to a first heat exchanger, the first heat exchanger is connected to an expansion valve, the expansion valve is connected to a second heat exchanger, the second heat exchanger is a liquid-liquid heat exchanger, and it is connected to the inlet of the compressor, one end of the temperature control pipe and a water pump respectively, and the other end of the water pump and the temperature control pipe are respectively connected to a water tank.

[0007] Furthermore, the first heat exchanger is an air-cooled heat exchanger, and a heat exchange fan is provided on one side of it.

[0008] Furthermore, the tank body, temperature regulating pipe, water tank, and the pipeline between the temperature regulating pipe and the water tank are all equipped with a heat insulation layer.

[0009] Furthermore, a second valve is connected between the breathing valve and the tank body, an air pump is connected to the top of the tank body, and a third valve is connected between the tank body and the air pump.

[0010] Furthermore, the lower side of the tank is provided with multiple support legs, and the oil outlet pipe is located in the middle of the lower side of the tank.

[0011] Furthermore, the water pump is connected to the water tank and the second heat exchanger by an inlet valve and an outlet valve, respectively.

[0012] Beneficial effects: This utility model sets a temperature regulating pipe on the outside of the tank and uses a temperature regulating box to supply cold water to the temperature regulating pipe. When the temperature of the vegetable oil in the tank is higher than a set threshold, it is cooled down, so that the temperature of the vegetable oil is kept within a low range, which greatly reduces the oxidation efficiency of the vegetable oil. Before filling with nitrogen, an air pump is set to remove the air from the cavity at the top of the tank and then fill with nitrogen, which greatly reduces the air content in the cavity, thereby effectively preventing the vegetable oil from oxidizing during storage in the tank. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a storage device for preventing vegetable oil oxidation according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the temperature control box according to an embodiment of the present utility model. Detailed Implementation

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0016] like Figure 1As shown, this embodiment of the invention provides a storage device for preventing the oxidation of vegetable oil, including a tank 1. The tank 1 has an oil inlet pipe 2 and an oil outlet pipe 3, with an oil inlet valve 4 and an oil outlet valve 5 respectively installed on the oil inlet pipe 2 and oil outlet pipe 3. After opening the oil inlet valve 4, vegetable oil can be added to the tank 1 through the oil inlet pipe 2. Opening the oil outlet valve 5 allows the vegetable oil in the tank 1 to be released. Multiple support legs 15 are provided on the lower side of the tank 1. The oil outlet pipe 3 is located in the middle of the lower side of the tank 1, and the oil inlet pipe 2 can be located on the side of the tank 1. A breather valve 6 and a nitrogen filling device 7 are connected to the top of the tank 1. The breather valve 6 prevents excessive pressure difference between the inside and outside of the tank 1 and meets the requirements for normal addition and release of vegetable oil. A first valve 8 is connected between the nitrogen filling device 7 and the tank 1. After opening the first valve 8, nitrogen stored in the nitrogen filling device 7 can be injected into the tank 1. A temperature regulating pipe 9 is wound around the outside of the tank body 1. The temperature regulating pipe 9 is connected to the temperature regulating box 10. The temperature regulating box 10 is used to deliver a temperature regulating medium into the temperature regulating pipe 9, thereby regulating the temperature of the vegetable oil inside the tank body 1. The temperature regulating medium is preferably water.

[0017] See Figure 2 Specifically, the temperature control box 10 includes a compressor 101. The outlet of the compressor 101 is connected to the first heat exchanger 102. The first heat exchanger 102 is connected to the expansion valve 103. The expansion valve 103 is connected to the second heat exchanger 104. The second heat exchanger 104 is a liquid-liquid heat exchanger. The second heat exchanger 104 is connected to the inlet of the compressor 101, one end of the temperature control pipe 9, and the water pump 105, respectively. The other end of the water pump 105 and the temperature control pipe 9 are respectively connected to the water tank 106. A temperature sensor (not shown in the figure) is installed inside the tank 1. The temperature sensor is used to collect the temperature of the vegetable oil. When the temperature of the vegetable oil is higher than the set temperature threshold, such as 15°C, the water pump 105 is started, so that the water in the water tank 106 is drawn into the second cooler 104, then flows into the temperature regulating pipe 9, and finally flows back into the water tank 106. At the same time, the compressor 101 starts, and the high-temperature and high-pressure refrigerant is compressed and flows into the first heat exchanger 102 for heat dissipation. After being throttled by the expansion valve 103, it becomes liquid and flows into the second heat exchanger 104. After evaporating in the second heat exchanger 104, it absorbs the heat from the water flowing through the second heat exchanger 104, thereby lowering the temperature of the water flowing into the temperature regulating pipe 9, and thus cooling the vegetable oil in the tank 1, keeping the vegetable oil at a lower temperature and avoiding accelerated oxidation at higher temperatures. The first heat exchanger 102 is preferably an air-cooled heat exchanger, and a heat exchange fan 107 is provided on one side of it. When the compressor 101 starts running, the heat exchange fan 107 also runs synchronously, thereby cooling the refrigerant in the first heat exchanger 102. For ease of maintenance, it is also preferable to connect an inlet valve 108 and an outlet valve 109 between the water pump 105 and the water tank 106 and the second heat exchanger 104, respectively.

[0018] Insulation layers, such as polyurethane foam insulation layers, are provided on the tank body 1, the temperature regulating pipe 9, the water tank 106, and the pipeline between the temperature regulating pipe 9 and the water tank 106 to reduce the influence of ambient temperature on the temperature of vegetable oil and water.

[0019] A second valve 11 is connected between the breather valve 6 and the tank 1. A vacuum pump 12 is also connected to the top of the tank 1, and a third valve 13 is connected between the tank 1 and the vacuum pump 12. After the vegetable oil is added, the vegetable oil will not fill the entire tank 1. There will be a cavity 14 between the liquid level of the vegetable oil and the top of the tank 1. At this time, first control the second valve 11 to close, then start the vacuum pump 12 and open the third valve 13 to extract the air from the cavity 14. Since the second valve 11 is closed, the breather valve 6 stops working, and the cavity 14 can be evacuated to a large vacuum. Then open the first valve 8 to fill the empty space at the top of the tank 1 with an appropriate amount of nitrogen. A vacuum pressure gauge can be set on the top of the tank 1 to determine the amount of nitrogen filled. After filling with nitrogen, the air pressure in the empty space at the top is slightly lower than the positive pressure opening threshold of the breather valve 6. For example, if the positive pressure opening threshold of the breather valve 6 is +2 kPa, the nitrogen can be filled to 1.5 kPa. After nitrogen filling is complete, the second valve 11 is opened, allowing the breather valve 6 to operate according to pressure changes within the tank 1. This significantly reduces the air content in the cavity 14 after nitrogen filling, thereby further improving the anti-oxidation effect. Additionally, a level gauge can be installed on the tank 1 to monitor the vegetable oil level.

[0020] The above description is merely a preferred embodiment of this utility model. It should be noted that for those skilled in the art, other parts not specifically described are existing technology or common knowledge. Several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A storage device for preventing the oxidation of vegetable oil, comprising a tank, wherein the tank is provided with an oil inlet pipe and an oil outlet pipe, the oil inlet pipe and the oil outlet pipe are respectively provided with an oil inlet valve and an oil outlet valve, a breather valve and a nitrogen filling device are connected to the top of the tank, and a first valve is connected between the nitrogen filling device and the tank, characterized in that, A temperature regulating pipe is wound around the outside of the tank. The temperature regulating pipe is connected to a temperature regulating box, which is used to deliver a temperature regulating medium into the temperature regulating pipe.

2. The storage device for preventing vegetable oil oxidation according to claim 1, characterized in that, The temperature control chamber includes a compressor, the outlet of which is connected to a first heat exchanger, the first heat exchanger is connected to an expansion valve, the expansion valve is connected to a second heat exchanger, the second heat exchanger is a liquid-liquid heat exchanger, and it is connected to the inlet of the compressor, one end of the temperature control pipe and a water pump respectively, and the other end of the water pump and the temperature control pipe are respectively connected to a water tank.

3. The storage device for preventing vegetable oil oxidation according to claim 2, characterized in that, The first heat exchanger is an air-cooled heat exchanger, and a heat exchange fan is provided on one side of it.

4. A storage device for preventing vegetable oil oxidation according to claim 2, characterized in that, The tank, temperature regulating pipe, water tank, and the pipeline between the temperature regulating pipe and the water tank are all equipped with a heat insulation layer.

5. A storage device for preventing vegetable oil oxidation according to claim 1, characterized in that, A second valve is connected between the breathing valve and the tank body, and an air pump is also connected to the top of the tank body. A third valve is connected between the tank body and the air pump.

6. A storage device for preventing vegetable oil oxidation according to claim 1, characterized in that, The tank body is provided with multiple support legs on its lower side, and the oil outlet pipe is located in the middle of the lower side of the tank body.

7. A storage device for preventing vegetable oil oxidation according to claim 2, characterized in that, The water pump is connected to the water tank and the second heat exchanger by an inlet valve and an outlet valve, respectively.

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