Ultrahigh-pressure cold extraction tea leaf extraction device

Abstract

The utility model relates to the technical field of tea extraction, in particular to an ultrahigh-pressure cold extraction tea extraction device which comprises an extraction kettle, a feed port is arranged at the upper end of the extraction kettle, a discharge port is arranged at the lower end of the extraction kettle, and a liquid inlet and an air inlet are respectively arranged on two sides of the extraction kettle. The liquid inlet is connected with a cooler used for cooling extract liquor, the cooler is provided with an extract liquor inlet, an extract liquor outlet, a cooling liquid inlet and a cooling liquid outlet, the extract liquor outlet is communicated with the liquid inlet through a water inlet pipe, and a first control valve is arranged at the liquid inlet; the gas inlet is connected with a supercharger for pressurizing the extraction kettle, the supercharger is communicated with the gas inlet through a pressure pipeline, and a second control valve is arranged at the gas inlet. According to the utility model, ultrahigh pressure treatment is matched with a cold extraction process, so that the cold extraction process can be improved, the extraction efficiency is improved, and meanwhile, the aroma and active ingredients of tea soup are reserved.

Description

Technical Field

[0001] The utility model relates to the technical field of tea extraction, in particular to an ultra-high pressure cold extraction tea extraction device. Background Art

[0002] At present, the production of sugar-free tea drinks mostly uses the hot extraction method of high-temperature steaming. In recent years, there are also some cold extraction processes to produce sugar-free tea. However, both processes have their own advantages and disadvantages. The traditional hot extraction method of high-temperature steaming has high extraction efficiency but will lose the aroma and active ingredients of the tea itself; the cold extraction process can improve the sensory quality of the tea soup, but it also has the problems of long extraction time and low extraction efficiency.

[0003] The Chinese utility model patent with authorization announcement number CN220860707U discloses a tea extraction device with a cooling function. The tea extraction device can effectively replace the heat in the tea extract, thereby realizing the cooling of the tea extract. The tea extraction device cooperates with the cooling mechanism to have a good cooling function, ensures the extraction and cooling efficiency of the tea, and reduces the generation of water vapor, effectively increasing the overall use effect of the tea extraction device. However, this thermal extraction method will lose the aroma and active ingredients of the tea itself, and reduce the quality of the tea soup. Utility Model Content

[0004] The utility model aims to provide an ultra-high pressure cold extraction tea extraction device, which improves the cold extraction process, increases the extraction efficiency, and also retains the aroma and active ingredients of the tea soup.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions: an ultra-high pressure cold extraction tea extraction device, comprising an extraction kettle, wherein the upper end of the extraction kettle is provided with a feed port, and the lower end thereof is provided with a discharge port, and the two sides of the extraction kettle are respectively provided with a liquid inlet and an air inlet, and the liquid inlet is connected to a cooler for cooling the extraction liquid, and the cooler has an extraction liquid inlet, an extraction liquid outlet, a cooling liquid inlet and a cooling liquid outlet, the extraction liquid outlet is connected to the liquid inlet through a water inlet pipe, and a first control valve is provided at the liquid inlet; the air inlet is connected to a supercharger for pressurizing the extraction kettle, and the supercharger is connected to the air inlet through a pressure pipe, and a second control valve is provided at the air inlet.

[0006] Preferably, the extraction kettle comprises a kettle body, a high-pressure cylinder arranged in the kettle body and a sealing cover arranged at the feed port, a vertical stirring shaft is arranged in the high-pressure cylinder, and a first motor for driving the stirring shaft to rotate is arranged at the upper end of the kettle body.

[0007] Preferably, a heat-insulating layer is provided between the kettle body and the high-pressure cylinder.

[0008] Preferably, a filtering assembly is provided at the discharge port. The filtering assembly includes a filtering box. A filtering inlet is provided at the upper end of the filtering box, and a filtering outlet is provided at the lower end thereof. The filtering inlet is communicated with the discharge port. A third control valve is provided at the discharge port. A filter screen is provided in the filtering box.

[0009] Preferably, an extrusion screw is provided in the filtering box. The extrusion screw is located above the filter screen. A second motor for driving the extrusion screw to rotate is provided outside the filtering box. A discharge port is provided at the tail end of the extrusion screw, and a sealing plate is installed at the discharge port.

[0010] Preferably, the filter screen is in an arc-shaped structure bent downward, and the extrusion screw is located within the arc of the filter screen.

[0011] Preferably, a guide plate is provided below the filter screen. The guide plate is inclined. The higher end of the guide plate is located below the discharge port, and the lower end is located at the filtering outlet.

[0012] Advantages of the present utility model:

[0013] By means of ultra-high pressure treatment in cooperation with the cold extraction process, the present utility model can improve the cold extraction process, enhance the extraction efficiency, and simultaneously retain the aroma and active ingredients of the tea soup. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 is a cross-sectional view of the extraction kettle in an embodiment of the present utility model;

[0016] Figure 3 is a cross-sectional view of the filtering assembly in an embodiment of the present utility model;

[0017] Figure 4 is Figure 3 a cross-sectional view taken at A-A in

[0018] In the figure: 1 - extraction kettle, 101 - kettle body, 102 - high-pressure cylinder, 103 - thermal insulation layer, 104 - feed inlet, 105 - sealing cover, 106 - discharge outlet, 107 - liquid inlet, 108 - gas inlet, 109 - stirring shaft, 110 - first motor, 2 - cooler, 201 - extraction liquid inlet, 202 - extraction liquid outlet, 203 - coolant inlet, 204 - coolant outlet, 3 - supercharger, 4 - filtration component, 401 - filtration box, 402 - filtration inlet, 403 - filtration outlet, 404 - discharge port, 405 - sealing plate, 406 - filter screen, 407 - extrusion screw, 408 - second motor, 409 - guide plate, 5 - water inlet pipe, 6 - first control valve, 7 - pressure pipeline, 8 - second control valve, 9 - third control valve. Detailed implementation mode

[0019] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0020] This specific embodiment is merely an interpretation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0021] Embodiment: As Figure 1 and Figure 2 shown, a super-high pressure cold extraction tea extraction device includes an extraction kettle 1. The extraction kettle 1 includes a kettle body 101. A high-pressure cylinder 102 is installed inside the kettle body 101. A thermal insulation layer 103 is provided between the kettle body 101 and the high-pressure cylinder 102. The thermal insulation layer 103 uses a thermal insulation surface or other materials.

[0022] The upper end of the extraction kettle 1 is provided with a feed inlet 104, and its lower end is provided with a discharge outlet 106. A liquid inlet 107 and a gas inlet 108 are respectively provided on both sides of the extraction kettle 1. The feed inlet 104, the discharge outlet 106, the liquid inlet 107, and the gas inlet 108 are all communicated with the high-pressure cylinder 102.

[0023] A detachable sealing cover 105 is installed at the feed inlet 104. A vertical stirring shaft 109 is provided inside the high-pressure cylinder 102. The upper end of the stirring shaft 109 is rotatably installed at the upper end of the kettle body 101. A first motor 110 is installed at the upper end of the kettle body 101. The first motor 110 drives the stirring shaft 109 to rotate. The feed inlet 104 is located on one side of the first motor 110.

[0024] The liquid inlet 107 is connected to a cooler 2 for cooling the extraction liquid. The cooler 2 uses a plate heat exchanger, which has an extraction liquid inlet 201, an extraction liquid outlet 202, a coolant inlet 203, and a coolant outlet 204. The extraction liquid outlet 202 and the liquid inlet 107 are connected through a water inlet pipe 5. A first control valve 6 is arranged at the liquid inlet 107, and the first control valve 6 uses an existing flow control valve.

[0025] The air inlet 108 is connected to a supercharger 3 for pressurizing the extraction kettle 1. The supercharger 3 is connected to the air inlet 108 through a pressure pipeline 7. A second control valve 8 is arranged at the air inlet 108, and the second control valve 8 uses a conventional pressure control valve. The supercharger 3 uses a booster pump.

[0026] In this embodiment, the extraction liquid uses RO water. The RO water enters the plate heat exchanger through the extraction liquid inlet 201 for cooling. After cooling to 0 - 5 °C, it enters the extraction kettle 1 through the water inlet pipe 5, mixes with the tea leaves in the extraction kettle 1, and then is pressurized by the supercharger 3 to reach a pressure of 300 Mpa and maintained for 3 - 5 minutes. After pressure relief, the tea soup is discharged through the bottom discharge port 106.

[0027] Generally, the pressure of liquid or gas is called low pressure at 0.1 mpa - 1.6 mpa, medium pressure at 1.6 mpa - 10 mpa, high pressure at 10 - 100 MPa, and ultra-high pressure above 100 MPa. Ultra-high pressure technology refers to using a pressure of 100 - 1000 mpa to process food at room temperature or mild heating conditions to achieve the purpose of sterilization, enzyme inactivation, and food processing. Extracting tea leaves with ultra-high pressure can improve the extraction rate and greatly shorten the extraction time.

[0028] As Figure 3 and Figure 4 shown, a filtering component 4 is arranged at the discharge port 106. The filtering component 4 includes a filtering box 401. The upper end of the filtering box 401 is provided with a filtering inlet 402, and its lower end is provided with a filtering outlet 403. The filtering inlet 402 is connected to the discharge port 106. A third control valve 9 is arranged at the discharge port 106, and the third control valve 9 uses a conventional flow valve.

[0029] A filter screen 406 is arranged in the filtering box 401. The filter screen 406 has a downwardly curved arc structure. An extrusion screw 407 is arranged in the filtering box 401. The two ends of the extrusion screw 407 are rotatably installed on the inner wall 2 of the filtering box 401. The extrusion screw 407 is located above the filter screen 406 and within the arc of the filter screen 406.

[0030] A second motor 408 is installed on the outer side of the filter box 401. The second motor 408 drives the extrusion screw 407 to rotate. A discharge port 404 is provided at the tail end of the extrusion screw 407, and a detachable sealing plate 405 is installed at the discharge port 404.

[0031] A diversion plate 409 is provided below the filter screen 406. The diversion plate 409 is inclined. The higher end of the diversion plate 409 is located below the discharge port 404, and the lower end is located at the filter outlet 403.

[0032] When the tea soup is discharged through the discharge port 106, the tea leaves are filtered out by the filter screen 406. When too many tea leaves accumulate on the filter screen 406, the second motor 408 operates to drive the extrusion screw 407 to rotate. The spiral blades on the extrusion screw 407 push the tea leaves on the filter screen 406 to move to one side of the filter box 401 and squeeze the tea leaves to extract the moisture carried by the tea leaves. When there are too many tea leaves, the third control valve 9 is closed and the sealing plate 405 is opened, and the tea leaves are discharged from the discharge port 404.

Claims

1. An ultra-high pressure cold extraction tea extraction device, comprising an extraction kettle (1), wherein a feed inlet (104) is arranged at the upper end of the extraction kettle (1), and a discharge outlet (106) is arranged at the lower end thereof, and is characterized in that, On both sides of the extraction kettle (1), a liquid inlet (107) and a gas inlet (108) are respectively arranged. The liquid inlet (107) is connected to a cooler (2) for cooling the extraction liquid. The cooler (2) has an extraction liquid inlet (201), an extraction liquid outlet (202), a coolant inlet (203) and a coolant outlet (204). The extraction liquid outlet (202) and the liquid inlet (107) are communicated through a water inlet pipe (5), and a first control valve (6) is arranged at the liquid inlet (107); the gas inlet (108) is connected to a supercharger (3) for pressurizing the extraction kettle (1). The supercharger (3) is communicated with the gas inlet (108) through a pressure pipeline (7), and a second control valve (8) is arranged at the gas inlet (108).

2. The ultra-high pressure cold extraction tea extraction device according to claim 1, wherein: The extraction kettle (1) includes a kettle body (101), a high-pressure cylinder (102) arranged in the kettle body (101), and a sealing cover (105) arranged at the feed inlet (104). A vertical stirring shaft (109) is arranged in the high-pressure cylinder (102), and a first motor (110) for driving the stirring shaft (109) to rotate is arranged at the upper end of the kettle body (101).

3. The ultra-high pressure cold extraction tea extraction device according to claim 2, wherein: A heat preservation layer (103) is arranged between the kettle body (101) and the high-pressure cylinder (102).

4. The ultra-high pressure cold extraction tea extraction device according to claim 1, wherein: A filtering component (4) is arranged at the discharge port (106). The filtering component (4) includes a filtering box (401). A filtering inlet (402) is arranged at the upper end of the filtering box (401), and a filtering outlet (403) is arranged at the lower end thereof. The filtering inlet (402) is communicated with the discharge port (106), and a third control valve (9) is arranged at the discharge port (106). A filtering net (406) is arranged in the filtering box (401).

5. The super-high-pressure cold extraction tea extraction device according to claim 4, wherein: An extrusion screw (407) is arranged in the filtering box (401). The extrusion screw (407) is located above the filtering net (406). A second motor (408) for driving the extrusion screw (407) to rotate is arranged outside the filtering box (401). A discharge port (404) is arranged at the tail end of the extrusion screw (407), and a sealing plate (405) is installed at the discharge port (404).

6. The ultra-high pressure cold extraction tea extraction device according to claim 5, characterized in that: The filtering net (406) has a downwardly curved arc structure, and the extrusion screw (407) is located within the arc of the filtering net (406).

7. The super-high pressure cold extraction tea extraction device according to claim 6, characterized in that: A guide plate (409) is arranged below the filtering net (406). The guide plate (409) is inclined. The higher end of the guide plate (409) is located below the discharge port (404), and the lower end is located at the filtering outlet (403).

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