Cold pressing process for traditional Chinese medicine oil

Abstract

The invention relates to the technical field of traditional Chinese medicine oil, in particular to a traditional Chinese medicine oil cold pressing process which comprises the following steps: step 1, screening and cleaning raw materials: selecting high-quality traditional Chinese medicinal materials without mildew and worm damage, screening the traditional Chinese medicinal materials to remove impurities, and then cleaning the traditional Chinese medicinal materials; step 2, pretreatment: performing low-temperature crushing on the cleaned traditional Chinese medicinal materials through cold pressing equipment, and destroying cell structures of the traditional Chinese medicinal materials in a low-temperature environment; the pretreated traditional Chinese medicine powder directly enters a spiral squeezing interval in cold squeezing equipment, grease is squeezed out, the low temperature is kept in the cold squeezing equipment in the whole process in the squeezing process, and the low temperature of the traditional Chinese medicine oil is kept; step 4, filtering and settling: filtering and settling the squeezed oil; according to the device, traditional Chinese medicinal materials are crushed at low temperature through the cold pressing equipment, so that the low temperature is continuously kept in the crushing process of the traditional Chinese medicinal materials, and the situation that the traditional Chinese medicinal materials are too high in temperature in the processing process and the properties of the traditional Chinese medicinal materials are affected is avoided.

Description

Technical Field

[0001] This invention relates to the field of Chinese medicinal oils, and more particularly to the cold pressing process for Chinese medicinal oils. Background Technology

[0002] Cold pressing of Chinese medicinal herbs is a modern process that uses low-temperature physical pressing to extract oil from oil-containing Chinese medicinal herbs. Unlike traditional high-temperature oil pressing or chemical extraction methods, cold pressing technology strictly controls the temperature below 60℃ throughout the entire process.

[0003] The core of this process lies in "cold extraction of oil," which mainly involves directly pressing medicinal raw materials, such as purple gromwell, angelica, and ginger, using mechanical pressure. This avoids the damage of high temperatures to oils, volatile components, and heat-sensitive active substances (such as certain vitamins and natural antioxidants). The medicinal oil produced by this method can retain the natural flavor, color, and bioactivity of the raw materials to the greatest extent, making it more mild and pure.

[0004] Cold-pressed Chinese herbal oils are of superior quality, with a clear color, pure aroma, and complete preservation of active ingredients. They are widely used in external massage, ointment formulation, and high-end skin care products. They combine the advantages of traditional Chinese medicine efficacy with modern low-temperature extraction technology, making them one of the ideal ways to obtain high-quality Chinese herbal oils.

[0005] When cold pressing is used to obtain Chinese medicinal herbs, the oil yield is reduced due to the low temperature during pressing. Therefore, in order to increase the oil yield, the Chinese medicinal herbs need to be pulverized to fully destroy the cell membrane, thereby increasing the oil yield during cold pressing. However, during the pulverization process, the high-speed rotation of the blades generates heat, which leads to an increase in temperature and affects the cold pressing effect of the Chinese medicinal herbs. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cold-pressing process for Chinese herbal oils.

[0007] This invention provides a cold-pressing process for traditional Chinese medicine oil, comprising the following steps:

[0008] Step 1: Raw material screening and cleaning: Select high-quality Chinese medicinal materials that are free from mold and insect infestation, and clean them after screening to remove impurities.

[0009] Step 2, Pretreatment: The cleaned Chinese medicinal materials are pulverized at low temperature using a cold pressing device. The low temperature environment destroys the cell structure of the Chinese medicinal materials, making it easier for the oil to flow out.

[0010] Step 3, Low-temperature pressing: The pre-treated Chinese herbal powder directly enters the screw pressing zone of the cold pressing equipment. The cold pressing equipment generates huge pressure through the rotation of the screw shaft to squeeze out the oil. During the pressing process, the inside of the cold pressing equipment is kept at a low temperature to remove the heat generated during the pressing process and maintain the low temperature of the Chinese herbal oil.

[0011] Step 4: Filtration and sedimentation: Filter the pressed oil to remove small particles of Chinese medicinal residue. Then, after multi-stage fine filtration and sedimentation, a clear and transparent Chinese medicinal oil is obtained.

[0012] By using cold-pressing equipment to pulverize Chinese medicinal herbs at low temperatures, the low temperature is maintained continuously during the pulverization process. This helps to prevent the temperature from becoming too high during processing, which could affect the medicinal properties of the herbs. Furthermore, the cold-pressing equipment performs low-temperature pressing on the pulverized herbs, maintaining the low temperature during the pressing process as well. This increases the oil yield while preserving the medicinal properties of the medicinal oil.

[0013] Preferably, the cold pressing equipment mentioned in step two and step three includes:

[0014] The grinding chamber is externally fixed with an outer shell, forming a cooling chamber between the outer shell and the grinding chamber;

[0015] A sealing cover is detachably fixed to the top of the crushing chamber, and a pressure relief valve is embedded through the top of the sealing cover;

[0016] The first motor is fixed to the top of the sealing cover, and its output shaft passes through the sealing cover and enters the interior of the crushing chamber;

[0017] A shredder is rotatably mounted inside the shredding chamber, and the first motor drives the shredder to rotate via its output shaft.

[0018] The feed inlet is located on the outer wall of the outer shell and is used to connect to the cooling chamber for the delivery of liquid nitrogen;

[0019] The spiral pressing section is used for low-temperature pressing of pulverized Chinese medicine.

[0020] Workers place the Chinese medicinal herbs to be pressed into the grinding chamber, then close the sealing lid to ensure the herbs remain inside, preventing splashing during grinding. Next, an external liquid nitrogen tank is activated, introducing liquid nitrogen into the cooling chamber through the feed inlet. The liquid nitrogen cools the grinding chamber, which is thick and made of heat-conducting material internally, with a smooth and sturdy surface. This overall cooling effect of the liquid nitrogen cools the entire chamber, thus cooling the herbs inside. Then, the first motor is started, driving the connected grinding blades through the output shaft. The rotating blades grind the herbs, ensuring the grinding process is performed at a low temperature to prevent the heat generated during grinding from affecting the medicinal properties.

[0021] Preferably, the cold pressing equipment further includes:

[0022] An arc-shaped frame is inserted into the side wall of the crushing chamber, and its top is positioned by a pin.

[0023] The first inner groove is formed inside the arc-shaped frame;

[0024] The first filter screen is fixed to the bottom of the arc-shaped frame;

[0025] The inlet is located at the top edge of the arc-shaped frame and extends through the side wall of the crushing chamber, with the rear portion situated inside the cooling chamber. The inlet is aligned with the feed port.

[0026] The mesh panel is fixed to the top of the arc-shaped frame;

[0027] The first opening is located at the bottom center of the arc-shaped frame to make way for the crushing blade;

[0028] The arc-shaped frame design ensures that when liquid nitrogen is fed in through the inlet, a portion enters the first inner tank. Part of the liquid nitrogen entering the first inner tank vaporizes, cooling the interior of the grinding chamber, while the other part falls directly along the first filter screen into the grinding chamber. This allows the liquid nitrogen to permeate the medicinal herbs during stirring, effectively cooling them. The mesh screen isolates the herbs to prevent splashing during grinding and ensures nitrogen flow without overflowing, preventing excessive pressure inside the grinding chamber. When this occurs, the vaporized nitrogen gas flows along the first filter screen into the grinding chamber, thus clearing the filter screen and preventing the pulverized medicinal materials from clogging it. Simultaneously, the vaporized nitrogen fills the grinding chamber, allowing the medicinal materials to be pulverized in an inert gas environment. This helps prevent oxidation of the pulverized materials upon contact with air, thus avoiding the oxidation of easily oxidized medicinal materials and the resulting loss of medicinal properties. In summary, by introducing a small amount of liquid nitrogen into the interior of the medicinal materials for stirring, the materials can be effectively cooled, preventing excessively high temperatures from affecting their medicinal properties.

[0029] Preferably, the cold pressing equipment further includes:

[0030] Multiple second openings are arranged in a linear array and penetrate the side wall of the outer casing, with the bottom of the second opening slightly higher than the bottom of the inner wall of the crushing chamber;

[0031] The second filter screen is embedded through the second filter screen;

[0032] A heat-insulating shell is fixed to the outside of the outer shell, forming a storage compartment between the shell and the outer shell, and the second opening communicates with the storage compartment;

[0033] The second opening ensures that when liquid nitrogen is injected into the cooling chamber, any overflowing liquid nitrogen, especially when the liquid nitrogen level or boiling point reaches the bottom of the second opening, will enter the storage chamber through the second opening. This prevents the liquid nitrogen level inside the cooling chamber from exceeding the bottom of the grinding chamber, thus avoiding excessive liquid nitrogen injection that could soak the medicinal herbs and negatively impact the grinding process. The heat insulation shell isolates the liquid nitrogen from the external temperature when it enters the cooling chamber, reducing the impact of external temperature on the grinding process. The second filter allows some liquid nitrogen to boil at room temperature and enter the grinding chamber, enhancing the cooling effect on the medicinal herbs. This also allows a small amount of liquid nitrogen to mix into the bottom of the medicinal herbs, further enhancing the cooling effect.

[0034] Preferably, the cold pressing equipment further includes:

[0035] A fixed bucket is fixed inside the storage compartment, with its top slightly lower than the bottom of the second opening;

[0036] A liquid nitrogen pump is fixed to the bottom of the heat insulation shell, and its input end is connected to the bottom of the fixed bucket through a first connecting pipe;

[0037] The fixed bucket design ensures that when the liquid level inside the storage chamber reaches the height of the fixed bucket, the liquid nitrogen pump will pump liquid nitrogen out, thus preventing the liquid nitrogen level inside the storage chamber from exceeding the bottom of the second opening. This helps to avoid excessive liquid nitrogen inside the storage chamber, which could affect the liquid level control effect inside the cooling chamber.

[0038] Preferably, the cold pressing equipment further includes:

[0039] The conveying hopper is fixedly connected to the bottom of the outer shell and penetrates the heat insulation shell, connecting to the cooling chamber;

[0040] A rotating box is rotatably installed inside the conveying hopper, with its top located inside the cooling chamber, and a second inner groove is provided inside.

[0041] Multiple transfer slots are arranged in a circular array on the outer wall of the rotating box;

[0042] The second motor is fixed to the outer wall of the conveying bucket to drive the rotating box to rotate via its output shaft;

[0043] After the second motor starts, it drives the rotating box to rotate, which in turn drives the transfer trough to rotate. The transfer trough is a shallow trough, so that after the pulverized Chinese medicinal materials pass through the second filter screen and enter the interior of the cooling chamber, the Chinese medicinal powder will enter the interior of the transfer trough. When the transfer trough rotates, it will carry a small amount of Chinese medicinal powder through the transfer trough and then through the conveying hopper to achieve feeding. Throughout the process, the Chinese medicinal materials are kept at a low temperature. Because the transfer trough is shallow, a very small amount of Chinese medicinal powder can fill the transfer trough after entering it, thus avoiding the situation where a large amount of liquid nitrogen fills the interior of the transfer trough and causes a large amount of liquid nitrogen to be transferred.

[0044] Preferably, the spiral pressing zone includes:

[0045] A cylindrical container is located below the crushing chamber, and its top is connected to the bottom of the conveying hopper through a third opening;

[0046] The third motor is fixed to the end of the cylinder;

[0047] The conveying blade is rotatably installed inside the cylinder, and the third motor drives the conveying blade to rotate through the output shaft, and the blade spacing of the conveying blade gradually decreases;

[0048] A filter cartridge is fixed inside the cylinder and encloses the conveying blades;

[0049] The discharge port is fixedly connected to the bottom of the cylinder;

[0050] A collection box is plugged into and installed at the bottom of the discharge port;

[0051] After the third motor rotates, it drives the conveyor blades to rotate. The distance between the blades of the conveyor blades gradually decreases, which gradually compresses the Chinese medicinal materials during the conveying process. The Chinese medicinal oil produced by the compression passes through the filter cylinder and enters the interior of the cylinder. Then, it enters the collection box through the feed port, thus realizing the cold pressing of Chinese medicinal materials. At the same time, when the crushed Chinese medicinal powder passes through the conveyor hopper and enters the interior of the cylinder, it will also carry some liquid nitrogen in, so that the Chinese medicinal materials are kept in a low temperature and inert gas atmosphere during the pressing process, which helps to ensure the effect of cold pressing of Chinese medicinal materials.

[0052] Preferably, the cold pressing equipment further includes:

[0053] A pressure relief box is fixed to the outer wall of the conveying hopper. The bottom of the pressure relief box is inclined and extends through the side wall of the conveying hopper into the interior of the conveying hopper to form a downward-opening fourth opening.

[0054] Multiple round holes are formed on the upper side wall of the pressure relief box;

[0055] When the pulverized Chinese medicine is conveyed along the conveyor bucket along with liquid nitrogen, the vaporized nitrogen gas will be discharged through the round hole of the pressure relief box through the fourth opening, which helps to avoid the situation where the gas generated after the large amount of liquid nitrogen vaporization causes the internal pressure of the cylinder to be too high.

[0056] Preferably, the cold pressing equipment further includes:

[0057] The mounting groove is formed inside the rotating shaft of the crusher blade;

[0058] A temperature sensor is fixed inside the mounting slot, and multiple heat-conducting metal heads are fixed to the outer wall of the housing of the temperature sensor. The heat-conducting metal heads penetrate the side wall of the crusher shaft.

[0059] Temperature sensors can detect the temperature during the pulverization process of traditional Chinese medicine. When the detected temperature is below the minimum temperature threshold, the delivery of liquid nitrogen is stopped. When the detected temperature reaches the maximum temperature threshold, the delivery of liquid nitrogen is accelerated. This allows for real-time monitoring and adjustment of the temperature during the pulverization process, ensuring that the temperature remains within the set range to avoid adverse effects of temperature on the cold pressing of traditional Chinese medicine.

[0060] Preferably, the cold pressing equipment further includes:

[0061] The second connecting pipe is fixed at one end to the bottom of the heat insulation shell to connect to the storage compartment;

[0062] The second inner groove is formed inside the rotating shaft of the conveying blade. The other end of the second connecting pipe is connected to the cylinder and aligned with the second inner groove. The conveying blade is made of a heat-conducting metal material.

[0063] The second connecting pipe can deliver liquid nitrogen or low-temperature nitrogen gas into the interior of the second inner tank, thereby lowering the temperature inside the second inner tank and cooling the heat-conducting metal conveying blades. This reduces the temperature rise caused by extrusion on the contact surface between the conveying blades and the Chinese medicinal materials during the extrusion process due to the low temperature of the conveying blades.

[0064] Compared with the prior art, the present invention has the following beneficial effects:

[0065] 1. By using cold pressing equipment to pulverize Chinese medicinal materials at low temperatures, the low temperature is maintained continuously during the pulverization process, which helps to avoid the occurrence of excessively high temperatures during the processing of Chinese medicinal materials, which could affect the medicinal properties.

[0066] 2. The arc-shaped frame design allows some of the liquid nitrogen to enter the first inner tank when it is fed in through the inlet. By introducing a small amount of liquid nitrogen into the Chinese medicinal materials for stirring, the materials can be cooled down effectively, preventing the medicinal properties from being affected by excessively high temperatures.

[0067] 3. The transfer tank is designed to be shallow, so that a very small amount of Chinese medicine powder can fill the tank after entering it, thus avoiding the situation where a large amount of liquid nitrogen is transferred due to the large amount of liquid nitrogen filling the tank. Attached Figure Description

[0068] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0069] Figure 2 This is a schematic diagram of the overall cross-section of the present invention. Figure 1 .

[0070] Figure 3 For the present invention Figure 2 A magnified structural diagram of point A in the middle.

[0071] Figure 4 For the present invention Figure 2 A magnified structural diagram at point B in the middle.

[0072] Figure 5 For the present invention Figure 2 A magnified structural diagram at point C.

[0073] Figure 6 This is a schematic diagram of the overall cross-section of the present invention. Figure 2 .

[0074] Figure 7 For the present invention Figure 6 A magnified structural diagram at point D.

[0075] In the diagram: 1. Grinding chamber; 101. Outer shell; 102. Sealing cover; 103. First motor; 104. Grinding blade; 105. Cooling chamber; 106. Feed inlet; 2. Arc-shaped frame; 201. First inner groove; 202. First filter screen; 203. First opening; 204. Mesh plate; 205. Inlet; 206. Insert pin; 3. Second opening; 301. Second filter screen; 302. Heat insulation shell; 303. Storage chamber; 4. Fixed hopper; 401. First connecting pipe; 402, liquid nitrogen pump; 5, rotating box; 501, transfer trough; 502, second inner trough; 503, conveying hopper; 504, second motor; 6, cylinder; 601, third motor; 602, conveying blade; 603, filter cylinder; 604, discharge port; 605, collection box; 606, third opening; 7, pressure relief box; 701, round hole; 702, fourth opening; 8, temperature sensor; 9, second connecting pipe; 901, second inner trough. Detailed Implementation

[0076] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0077] like Figures 1 to 7 The cold-pressing process for Chinese herbal oil shown includes the following steps:

[0078] Step 1: Raw material screening and cleaning: Select high-quality Chinese medicinal materials that are free from mold and insect infestation, and clean them after screening to remove impurities.

[0079] Step 2, Pretreatment: The cleaned Chinese medicinal materials are pulverized at low temperature using a cold pressing device. The low temperature environment destroys the cell structure of the Chinese medicinal materials, making it easier for the oil to flow out.

[0080] Step 3, Low-temperature pressing: The pre-treated Chinese herbal powder directly enters the screw pressing zone of the cold pressing equipment. The cold pressing equipment generates huge pressure through the rotation of the screw shaft to squeeze out the oil. During the pressing process, the inside of the cold pressing equipment is kept at a low temperature to remove the heat generated during the pressing process and maintain the low temperature of the Chinese herbal oil.

[0081] Step 4: Filtration and sedimentation: Filter the pressed oil to remove small particles of Chinese medicinal residue. Then, after multi-stage fine filtration and sedimentation, a clear and transparent Chinese medicinal oil is obtained.

[0082] When cold pressing is used to obtain Chinese medicinal herbs oil, the oil yield is reduced due to the low temperature during pressing. Therefore, in order to increase the oil yield, the Chinese medicinal herbs need to be crushed to fully destroy the cell membrane, thereby increasing the oil yield during cold pressing. However, during the crushing process, the high-speed rotation of the blades generates heat, which leads to an increase in temperature and affects the cold pressing effect of the Chinese medicinal herbs.

[0083] This embodiment of the invention can solve the above problems. The specific implementation method is as follows: by using a cold pressing device to pulverize Chinese medicinal materials at low temperature, the low temperature is maintained continuously during the pulverization process. This helps to avoid the situation where the temperature of the Chinese medicinal materials is too high during the processing, which would affect the medicinal properties. Furthermore, by using a cold pressing device to press the pulverized Chinese medicinal materials at low temperature, the low temperature of the Chinese medicinal materials is maintained during the pressing process. This increases the oil yield while maintaining the low temperature of the Chinese medicinal materials to ensure the medicinal properties of the Chinese medicinal oil.

[0084] As an optional embodiment, the cold pressing equipment in steps two and three includes:

[0085] The grinding chamber 1 is fixed with an outer shell 101, so that a cooling chamber 105 is formed between the outer shell 101 and the grinding chamber 1.

[0086] The sealing cover 102 is detachably fixed to the top of the crushing chamber 1, and a pressure relief valve is embedded through the top of the sealing cover 102;

[0087] The first motor 103 is fixed to the top of the sealing cover 102, and its output shaft passes through the sealing cover 102 and enters the interior of the crushing chamber 1;

[0088] The crushing blade 104 is rotatably installed inside the crushing chamber 1, and the first motor 103 drives the crushing blade 104 to rotate through the output shaft;

[0089] The feed inlet 106 is located on the outer wall of the outer shell 101 and is used to connect to the cooling chamber 105 for the transfer of liquid nitrogen.

[0090] The spiral pressing section is used for low-temperature pressing of pulverized Chinese medicine.

[0091] The staff places the Chinese medicinal herbs to be pressed for oil inside the crushing chamber 1, then closes the sealing cover 102 to keep the herbs inside the crushing chamber 1, preventing splashing during crushing. Next, the external liquid nitrogen tank is activated, introducing liquid nitrogen into the cooling chamber 105 through the feed inlet 106. The liquid nitrogen cools the crushing chamber 1 inside the cooling chamber 105. The crushing chamber 1 has a certain thickness and is made of heat-conducting material internally, with a smooth and sturdy surface. This overall cooling effect of the liquid nitrogen cools the crushing chamber 1, thus cooling the herbs inside. Then, the first motor 103 is started. After starting, the first motor 103 drives the connected crushing blade 104 to rotate via the output shaft. The rotating crushing blade 104 crushes the herbs, ensuring the crushing operation is performed in a low-temperature environment to prevent the heat generated during crushing from affecting the medicinal properties.

[0092] As an optional embodiment, the cold pressing equipment also includes:

[0093] The arc-shaped frame 2 is inserted into the side wall of the crushing chamber 1, and its top is positioned by inserting a pin 206.

[0094] The first inner groove 201 is opened inside the arc-shaped frame 2;

[0095] The first filter screen 202 is fixed to the bottom of the arc-shaped frame 2;

[0096] Inlet 205 is located at the top edge of the arc frame 2 and extends through the rear part of the side wall of the crushing chamber 1, located inside the cooling chamber 105. Inlet 205 is aligned with the feed inlet 106.

[0097] Mesh panel 204 is fixed to the top of the arc-shaped frame 2;

[0098] The first opening 203 is located at the bottom center of the arc-shaped frame 2 to make way for the crushing blade 104;

[0099] The arc-shaped frame 2 allows some of the liquid nitrogen entering through the inlet 205 into the first inner tank 201 when it is fed in through the inlet 106. Part of the liquid nitrogen entering the first inner tank 201 vaporizes to cool the inside of the pulverizing chamber 1, while the other part falls directly down the first filter screen 202 into the pulverizing chamber 1. This allows the liquid nitrogen to integrate into the medicinal herbs during the stirring process, effectively cooling them. The mesh plate 204 isolates the medicinal herbs to prevent splashing during pulverization, while also ensuring nitrogen flow and preventing leakage from the pulverizing chamber 1. If the air pressure is too high, the vaporized nitrogen gas will flow along the first filter 202 into the interior of the grinding chamber 1, which will help to clear the first filter 202 and prevent the pulverized Chinese medicinal materials from clogging the first filter 202. At the same time, the vaporized nitrogen can fill the interior of the grinding chamber 1, so that the Chinese medicinal materials are pulverized in an inert gas environment, which helps to prevent the Chinese medicinal materials from oxidizing after contact with air, thus avoiding the oxidation of some easily oxidized Chinese medicinal materials and affecting their medicinal properties. In summary, by introducing a small amount of liquid nitrogen into the interior of the Chinese medicinal materials for stirring, the Chinese medicinal materials can be cooled down sufficiently, and the situation of excessive temperature affecting the medicinal properties of the Chinese medicinal materials can be avoided.

[0100] As an optional embodiment, the cold pressing equipment also includes:

[0101] Multiple second openings 3 are linearly arrayed and opened through the side wall of the outer shell 101, with the bottom of the second openings 3 slightly higher than the bottom of the inner wall of the crushing chamber 1;

[0102] The second filter screen 301 is embedded through the second filter screen 301;

[0103] The heat insulation shell 302 is fixed to the outside of the outer shell 101, forming a storage compartment 303 between the shell 101 and the outer shell 101, and the second opening 3 connects to the storage compartment 303;

[0104] The second opening 3 is designed so that when liquid nitrogen is injected into the cooling chamber 105, when the liquid nitrogen surface or boiling surface reaches the bottom of the second opening 3, the overflowing liquid nitrogen will enter the storage chamber 303 through the second opening 3. This ensures that the height of liquid nitrogen inside the cooling chamber 105 does not exceed the bottom of the pulverizing chamber 1, thus preventing excessive liquid nitrogen injection that could soak the Chinese medicinal materials and affect the pulverization process. The heat insulation shell 302 isolates the liquid nitrogen from the external temperature when it enters the cooling chamber 105, reducing the impact of external temperature on pulverization. The second filter 301 allows some liquid nitrogen to boil at room temperature and enter the pulverizing chamber 1 when it is inside the cooling chamber 105, thus enhancing the cooling effect on the Chinese medicinal materials. A small amount of liquid nitrogen will be mixed into the bottom of the Chinese medicinal materials to further enhance the cooling effect.

[0105] As an optional embodiment, the cold pressing equipment also includes:

[0106] The fixed bucket 4 is fixed inside the storage compartment 303, and its top is slightly lower than the bottom of the second opening 3;

[0107] The liquid nitrogen pump 402 is fixed to the bottom of the heat insulation shell 302, and its input end is connected to the bottom of the fixed bucket 4 through the first connecting pipe 401;

[0108] The fixed hopper 4 is designed so that when the liquid level inside the storage chamber 303 reaches the height of the fixed hopper 4, the liquid nitrogen pump 402 will pump liquid nitrogen out, thus ensuring that the liquid level inside the storage chamber 303 does not exceed the bottom of the second opening 3. This helps to prevent excessive liquid nitrogen inside the storage chamber 303 from affecting the liquid level control effect inside the cooling chamber 105.

[0109] As an optional embodiment, the cold pressing equipment also includes:

[0110] The conveyor bucket 503 is fixedly connected to the bottom of the outer shell 101 and penetrates the heat insulation shell 302, connecting to the cooling chamber 105;

[0111] Rotary box 5 is rotatably installed inside conveyor bucket 503, and its top is located inside cooling chamber 105. A second inner groove 502 is provided inside.

[0112] Multiple transfer slots 501 are arranged in a circular array on the outer wall of the rotating box 5;

[0113] The second motor 504 is fixed on the outer wall of the conveying bucket 503 so as to drive the rotating box 5 to rotate through the output shaft;

[0114] After the second motor 504 starts, it drives the rotating box 5 to rotate, and the rotating box 5 drives the transfer trough 501 to rotate. The transfer trough 501 is a shallow trough, so that after the crushed Chinese medicinal materials pass through the second filter screen 301 and enter the interior of the cooling chamber 105, the Chinese medicinal powder will enter the interior of the transfer trough 501. When the transfer trough 501 rotates, it will carry a small amount of Chinese medicinal powder through the transfer trough 501 and then through the conveying hopper 503 to achieve feeding. Throughout the process, the Chinese medicinal materials are kept at a low temperature. Since the transfer trough 501 is a shallow trough, a very small amount of Chinese medicinal powder can fill the transfer trough 501 after entering it, thereby avoiding the situation where a large amount of liquid nitrogen fills the interior of the transfer trough 501 and causes a large amount of liquid nitrogen to be transferred.

[0115] As an optional embodiment, the spiral pressing zone includes:

[0116] The cylinder 6 is located below the crushing chamber 1, and its top is connected to the bottom of the conveying hopper 503 through the third opening 606;

[0117] The third motor 601 is fixed to the end of the cylinder 6;

[0118] The conveying blade 602 is rotatably installed inside the cylinder 6. The third motor 601 drives the conveying blade 602 to rotate through the output shaft, and the blade spacing of the conveying blade 602 gradually decreases.

[0119] The filter cartridge 603 is fixed inside the cylinder 6 and encloses the conveyor blade 602;

[0120] The discharge port 604 is fixedly connected to the bottom of the cylinder 6;

[0121] The collection box 605 is plugged into the bottom of the discharge port 604;

[0122] After the third motor 601 rotates, it drives the conveyor blade 602 to rotate. The blade spacing of the conveyor blade 602 gradually decreases, so that the Chinese medicinal materials are gradually squeezed during the conveying process. The Chinese medicinal oil produced by the squeeze passes through the filter cylinder 603 and enters the interior of the cylinder 6. Then it enters the collection box 605 through the feed port 604, thereby realizing the cold pressing of Chinese medicinal materials. At the same time, when the crushed Chinese medicinal powder passes through the conveyor hopper 503 and enters the interior of the cylinder 6, it will also carry some liquid nitrogen in, so that the Chinese medicinal materials are kept in a low temperature and inert gas atmosphere during the pressing process, which is conducive to ensuring the effect of cold pressing of Chinese medicinal materials.

[0123] As an optional embodiment, the cold pressing equipment also includes:

[0124] The pressure relief box 7 is fixed on the outer wall of the conveying bucket 503. The bottom of the pressure relief box 7 is inclined and extends through the side wall of the conveying bucket 503 into the interior of the conveying bucket 503 to form a downward-opening fourth opening 702.

[0125] Multiple round holes 701 are provided on the upper side wall of the pressure relief box 7;

[0126] When the pulverized Chinese medicine is conveyed along the conveyor bucket 503 along with liquid nitrogen, the vaporized nitrogen gas will be discharged through the round hole 701 of the pressure relief box 7 through the fourth opening 702, which helps to avoid the situation where the gas generated after the vaporization of a large amount of liquid nitrogen causes the internal pressure of the cylinder 6 to be too high.

[0127] As an optional embodiment, the cold pressing equipment also includes:

[0128] The mounting slot is located inside the rotating shaft of the shredder 104;

[0129] Temperature sensor 8 is fixed inside the mounting slot, and multiple heat-conducting metal heads are fixed on the outer wall of the housing of temperature sensor 8. The heat-conducting metal heads penetrate the side wall of the rotating shaft of crusher 104.

[0130] Temperature sensor 8 can detect the temperature during the traditional Chinese medicine pulverization process. When the detected temperature is below the minimum temperature threshold, the delivery of liquid nitrogen is stopped. When the detected temperature reaches the maximum temperature threshold, the delivery of liquid nitrogen is accelerated. This facilitates real-time monitoring and adjustment of the temperature during the traditional Chinese medicine pulverization process, ensuring that the temperature remains within the set range to avoid adverse effects of temperature on the cold pressing of traditional Chinese medicine.

[0131] As an optional embodiment, the cold pressing equipment also includes:

[0132] The second connecting pipe 9 is fixed at one end to the bottom of the heat insulation shell 302 to connect to the storage compartment 303;

[0133] The second inner groove 901 is opened inside the rotating shaft of the conveying blade 602. The other end of the second connecting pipe 9 is connected to the cylinder 6 and aligned with the second inner groove 901. The conveying blade 602 is made of heat-conducting metal.

[0134] The second connecting pipe 9 can deliver liquid nitrogen or low-temperature nitrogen gas to the interior of the second inner tank 901, thereby reducing the temperature inside the second inner tank 901 and cooling the heat-conducting metal conveying blade 602. This reduces the temperature rise caused by extrusion on the contact surface between the conveying blade 602 and the Chinese medicinal materials during the extrusion process due to the low temperature of the conveying blade 602.

[0135] The working principle of this invention is as follows: By using a cold-pressing device to pulverize Chinese medicinal herbs at low temperatures, the low temperature is maintained continuously during the pulverization process. This helps to avoid the medicinal properties of the herbs being affected by excessively high temperatures during processing. Furthermore, the cold-pressing device performs low-temperature pressing on the pulverized herbs, maintaining the low temperature of the herbs during the pressing process as well. This increases the oil yield while preserving the medicinal properties of the herbal oil.

[0136] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A cold-pressing process for traditional Chinese medicine oil, characterized in that, Includes the following steps: Step 1: Raw material screening and cleaning: Select high-quality Chinese medicinal materials that are free from mold and insect infestation, and clean them after screening to remove impurities. Step 2, Pretreatment: The cleaned Chinese medicinal materials are pulverized at low temperature using a cold pressing device. The low temperature environment destroys the cell structure of the Chinese medicinal materials, making it easier for the oil to flow out. Step 3, Low-temperature pressing: The pre-treated Chinese herbal powder directly enters the screw pressing zone of the cold pressing equipment. The cold pressing equipment generates huge pressure through the rotation of the screw shaft to squeeze out the oil. During the pressing process, the inside of the cold pressing equipment is kept at a low temperature to remove the heat generated during the pressing process and maintain the low temperature of the Chinese herbal oil. Step 4: Filtration and sedimentation: Filter the pressed oil to remove small medicinal residue particles, then perform multi-stage fine filtration, and after sedimentation, obtain clear and transparent medicinal oil.

2. The cold-pressing process for traditional Chinese medicine oil according to claim 1, characterized in that, The cold pressing equipment mentioned in step two and step three includes: The grinding chamber (1) is fixed with a shell (101) so that a cooling chamber (105) is formed between the shell (101) and the grinding chamber (1). A sealing cover (102) is detachably fixed to the top of the crushing chamber (1), and a pressure relief valve is embedded through the top of the sealing cover (102); The first motor (103) is fixed to the top of the sealing cover (102), and its output shaft passes through the sealing cover (102) and enters the interior of the crushing chamber (1); The pulverizing blade (104) is rotatably installed inside the pulverizing chamber (1), and the first motor (103) drives the pulverizing blade (104) to rotate through the output shaft; The feed inlet (106) is located on the outer wall of the outer shell (101) and is used to connect the cooling chamber (105) for the delivery of liquid nitrogen; The spiral pressing section is used for low-temperature pressing of pulverized Chinese medicine.

3. The cold-pressing process for traditional Chinese medicine oil according to claim 2, characterized in that, The cold pressing equipment also includes: An arc-shaped frame (2) is inserted into the side wall of the crushing chamber (1), and its top is positioned by a pin (206). The first inner groove (201) is formed inside the arc-shaped frame (2); The first filter screen (202) is fixed to the bottom of the arc-shaped frame (2); The inlet (205) is located at the top edge of the arc frame (2) and extends through the rear part of the side wall of the crushing chamber (1) and is located inside the cooling chamber (105). The inlet (205) is aligned with the feed inlet (106). The mesh panel (204) is fixed to the top of the arc-shaped frame (2); The first opening (203) is located at the bottom center of the arc frame (2) to make way for the crushing blade (104).

4. The cold-pressing process for traditional Chinese medicine oil according to claim 3, characterized in that, The cold pressing equipment also includes: Multiple second openings (3) are arranged in a linear array and penetrate the side wall of the outer shell (101), with the bottom of the second openings (3) slightly higher than the bottom of the inner wall of the crushing chamber (1); The second filter (301) is embedded through the second filter (301). The heat insulation shell (302) is fixed to the outside of the outer shell (101) and forms a storage compartment (303) between it and the outer shell (101). The second opening (3) communicates with the storage compartment (303).

5. The cold-pressing process for traditional Chinese medicine oil according to claim 4, characterized in that, The cold pressing equipment also includes: A fixed bucket (4) is fixed inside the storage compartment (303), and its top is slightly lower than the bottom of the second opening (3); A liquid nitrogen pump (402) is fixed to the bottom of the heat insulation shell (302), and its input end is connected to the bottom of the fixed bucket (4) through the first connecting pipe (401).

6. The cold-pressing process for traditional Chinese medicine oil according to claim 5, characterized in that, The cold pressing equipment also includes: The conveying bucket (503) is fixedly connected to the bottom of the outer shell (101) and penetrates the heat insulation shell (302) to connect to the cooling chamber (105). The rotating box (5) is rotatably installed inside the conveying bucket (503), and its top is located inside the cooling chamber (105), with a second inner groove (502) inside. Multiple transfer slots (501) are arranged in a circular array on the outer wall of the rotating box (5); The second motor (504) is fixed on the outer wall of the conveying bucket (503) to drive the rotating box (5) to rotate through the output shaft.

7. The cold-pressing process for traditional Chinese medicine oil according to claim 6, characterized in that, The spiral pressing zone includes: A cylinder (6) is located below the crushing chamber (1), and its top is connected to the bottom of the conveying hopper (503) through a third opening (606); The third motor (601) is fixed to the end of the cylinder (6); The conveying blade (602) is rotatably installed inside the cylinder (6). The third motor (601) drives the conveying blade (602) to rotate through the output shaft. The blade spacing of the conveying blade (602) gradually decreases. The filter cartridge (603) is fixed inside the cylinder (6) and wraps around the conveying blade (602). The discharge port (604) is fixedly connected to the bottom of the cylinder (6); The collection box (605) is plugged into the bottom of the discharge port (604).

8. The cold-pressing process for traditional Chinese medicine oil according to claim 7, characterized in that, The cold pressing equipment also includes: The pressure relief box (7) is fixed on the outer wall of the conveying bucket (503). The bottom of the pressure relief box (7) is inclined and extends through the side wall of the conveying bucket (503) to the interior of the conveying bucket (503) to form a downward-opening fourth opening (702). Multiple round holes (701) are provided on the upper side wall of the pressure relief box (7).

9. The cold-pressing process for traditional Chinese medicine oil according to claim 8, characterized in that, The cold pressing equipment also includes: The mounting groove is formed inside the shaft of the crusher (104); A temperature sensor (8) is fixed inside the mounting groove, and a plurality of heat-conducting metal heads are fixed on the outer wall of the housing of the temperature sensor (8), the heat-conducting metal heads penetrating the side wall of the rotating shaft of the crusher (104).

10. The cold-pressing process for traditional Chinese medicine oil according to claim 9, characterized in that, The cold pressing equipment also includes: The second connecting pipe (9) is fixed at one end to the bottom of the heat insulation shell (302) to connect to the storage compartment (303). The second inner groove (901) is opened inside the rotating shaft of the conveying blade (602). The other end of the second connecting pipe (9) is connected to the cylinder (6) and aligned with the second inner groove (901). The conveying blade (602) is made of heat-conducting metal.

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