Coffee cold extraction apparatus

Abstract

The utility model discloses a coffee cold extraction equipment, including cooling jar, the cooling jar includes the first cavity and second cavity of mutual isolation, is provided with the extraction jar and storage jar at the one side of cooling jar, and the storage jar sets up between the cooling jar and extraction jar, and the extraction jar includes the third cavity and fourth cavity of mutual isolation, is provided with stirring mechanism and filter screen in the third cavity, and the storage jar includes the fifth cavity and sixth cavity of mutual isolation, still be provided with refrigerating plant at the one side of cooling jar, and refrigerating plant is used for providing cooling liquid and is through circulating pipeline respectively with second cavity, fourth cavity and sixth cavity. The whole coffee cold extraction equipment is integrated from cold water, extraction, storage in the application, and the low temperature storage is carried out in the oxygen -free environment, thereby prolongs the storage date of coffee juice after extraction, and then is more simple and convenient in the time, temperature, mass extraction of coffee cold extraction, improves the efficiency, and solves the storage convenience of cold storage and oxygen -free environment simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of cold coffee extraction, and more specifically to a cold coffee extraction device. Background Technology

[0002] Currently, cold brewing of coffee in the market is usually done at home using simple bottles, jars, and filters. This method results in very small extraction volumes and an uncontrollable extraction process. Because cold brew technology requires extremely low temperatures, the existing method usually involves adding coffee grounds to cold water and then immersing it in the refrigerator. This method does not allow for stirring between the cold water and coffee grounds during immersion, resulting in long cold brew times and poor quality. Furthermore, when customers need to take the coffee out, the container must be removed from the refrigerator, which causes the temperature to rise and deviate from the taste of the cold brew. If this process is repeated multiple times, the coffee liquid will always be in an aerobic environment, making it easy for bacteria to grow during repeated temperature increases and decreases, thus posing a food safety hazard. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a coffee cold extraction device, comprising a cooling tank, which includes a first chamber and a second chamber isolated from each other. An extraction tank and a storage tank are disposed on one side of the cooling tank, with the storage tank located between the cooling tank and the extraction tank. The extraction tank includes a third chamber and a fourth chamber isolated from each other, with a stirring mechanism and a filter screen disposed in the third chamber. The storage tank includes a fifth chamber and a sixth chamber isolated from each other. The first chamber, the third chamber, and the fifth chamber are interconnected. A refrigeration device is also disposed on one side of the cooling tank, which provides coolant and is connected to the second chamber, the fourth chamber, and the sixth chamber respectively through circulation pipelines.

[0004] Furthermore, the cooling tank includes a first tank body and a second tank body, the first tank body being fitted inside the second tank body, the first cavity being disposed inside the first tank body, the second cavity being disposed between the first tank body and the second tank body, a first pipe being provided at the bottom of the first tank body, and a water inlet for injecting drinking water being provided in the first tank body.

[0005] Furthermore, the extraction tank includes a third tank body and a fourth tank body. The third tank body is fitted inside the fourth tank body. The third cavity is disposed inside the third tank body. The fourth cavity is disposed between the third tank body and the fourth tank body. A second pipe is provided on the side wall of the third tank body. The second pipe passes through the fourth tank body and communicates with a first pipe. A first pump body is provided between the second pipe and the first pipe. A third pipe is provided at the bottom of the third tank body. A feed inlet is provided at the top of the third tank body.

[0006] Furthermore, the stirring mechanism includes a stirring motor and a stirring assembly. The stirring motor is located above the third tank, the stirring assembly is connected to the drive end of the stirring motor and extends into the third cavity, and the filter screen is located at the bottom of the third cavity and below the stirring assembly.

[0007] Furthermore, the stirring assembly includes a support rod, which is horizontally placed in the third cavity and connected to the drive end of the stirring motor. The stirring motor can drive the support rod to rotate. Several stirring rods are vertically installed below the support rod. A brush plate is provided at the end of the stirring rod away from the support rod, and the brush plate is in contact with the upper surface of the filter screen.

[0008] Furthermore, the stirring rod consists of a horizontal cutting rod and a vertical cutting rod. The vertical cutting rod is provided with a vertical cutting plate arranged along the length direction of the third cavity, and the horizontal cutting rod is provided with a horizontal cutting plate arranged along the width direction of the third cavity. When the stirring rod moves in the water flow, the vertical cutting plate vertically cuts the water flow along the length direction of the third cavity, and the horizontal cutting plate horizontally cuts the water flow along the width direction of the third cavity.

[0009] Furthermore, the storage tank includes a fifth tank body and a sixth tank body, the fifth tank body being fitted inside the sixth tank body, the fifth cavity being disposed inside the fifth tank body, and the sixth cavity being disposed between the fifth tank body and the sixth tank body. A fourth pipe is provided at the bottom of the fifth tank body, and a carbon dioxide filling port and a liquid outlet are provided on the side wall of the fifth tank body. The third pipe and the fourth pipe are connected to a first pipe, and a first valve is provided on the first pipe. Second valves are provided on the third pipe and the fourth pipe.

[0010] Furthermore, a fifth pipe is provided between the fifth cavity and the second pipe, the fifth pipe being connected to both the fifth cavity and the second pipe, and a third valve is provided on the fifth pipe.

[0011] Furthermore, filter tanks are installed in the second and third pipes.

[0012] Furthermore, the circulation pipeline includes an outlet pipe and an inlet pipe. One end of the inlet pipe is connected to the refrigeration device, and the other end is connected to the side walls of the second, fourth, and sixth chambers respectively. One end of the outlet pipe is connected to the bottom of the second, fourth, and sixth chambers, and the other end is connected to the refrigeration device. A control panel is provided on one side of the refrigeration device, and the solenoid valve is electrically connected to the second pump body and the control panel.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This application integrates the entire cold coffee extraction equipment from aspects such as cold water, extraction, and storage, and stores the coffee in a low-temperature environment in an anaerobic environment, thereby extending the shelf life of the extracted coffee juice. This makes the cold coffee extraction process simpler, more efficient, and solves the problems of refrigeration and anaerobic environment storage.

[0015] Additional aspects and advantages of this invention will be set forth in the description which follows, and some will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is a pipeline structure diagram of the overall structure of this utility model;

[0020] Figure 4 This is a cross-sectional view of the extraction tank of this utility model;

[0021] Figure 5 This is a schematic diagram of the refrigeration device and circulation pipeline of this utility model.

[0022] The reference numerals and names in the figure are as follows:

[0023] Cooling tank 100, first chamber 110, second chamber 120, extraction tank 200, storage tank 300, third chamber 210, fourth chamber 220, stirring mechanism 230, filter screen 240, fifth chamber 310, sixth chamber 320, refrigeration device 400, circulation pipeline 410, first tank 130, second tank 140, first pipe 150, water inlet 131, third tank 250, fourth tank 260, second pipe 270, first pump body 280, third pipe 290, feed inlet 251, stirring motor 231, stirring... Mixing assembly 232, support rod 232a, stirring rod 232b, brush plate 232c, cross-cutting rod 232d, vertical cutting rod 232e, vertical cutting plate 232f, cross-cutting plate 232g, fifth tank 330, sixth tank 340, fourth pipeline 350, carbon dioxide filling port 331, liquid outlet 332, pressure relief valve 333, first valve 151, second valve 351, fifth pipeline 360, third valve 361, filter tank 271, liquid outlet pipe 411, liquid inlet pipe 412, second pump body 413, solenoid valve 414, control console 500. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The present invention will now be described in more detail. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0026] In the description of this utility model, it should be noted that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom," indicating directions or positional relationships, are generally based on the directions or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. In the description of this utility model, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] The preferred embodiments of this utility model will now be further described with reference to the accompanying drawings. Figure 1 , Figure 2 and Figure 5 As shown, a coffee cold extraction device includes a cooling tank 100, which includes a first chamber 110 and a second chamber 120 that are isolated from each other. An extraction tank 200 and a storage tank 300 are disposed on one side of the cooling tank 100, and the storage tank 300 is disposed between the cooling tank 100 and the extraction tank 200. The extraction tank 200 includes a third chamber 210 and a fourth chamber 220 that are isolated from each other. A stirring mechanism 230 and a filter screen 240 are disposed in the third chamber 210. The storage tank 300 includes a fifth chamber 310 and a sixth chamber 320 that are isolated from each other. The first chamber 110, the third chamber 210 and the fifth chamber 310 are interconnected. A refrigeration device 400 is also disposed on one side of the cooling tank 100. The refrigeration device 400 is used to provide coolant and is connected to the second chamber 120, the fourth chamber 220 and the sixth chamber 320 respectively through a circulation pipe 410.

[0030] In the operating state of this embodiment, room temperature drinking water is first placed into the first chamber 110. Then, the cooling device 400 is activated to inject coolant into the second chamber 120. The first chamber 110 and the second chamber 120 are isolated from each other, but heat exchange can still occur. In this state, the temperature of the drinking water in the first chamber 110 will reach a preset temperature, for example, 1 to 2 degrees Celsius, under the heat exchange of the coolant. At this time, the drinking water that has reached the preset temperature is injected into the third chamber 210 through a pipe. At the same time, coffee powder is added to the third chamber 210, and the mixture is stirred and filtered by the stirring mechanism 230 and the filter screen 240. During this process, coolant is injected into the fourth chamber 220, and the temperature of the drinking water in the third chamber 210 is increased. Supported by the heat exchange between the second chamber 120 and the fourth chamber 220, the entire cold extraction process can be carried out at a preset temperature, achieving temperature stability during the extraction process. Finally, the cold-extracted coffee liquid is sent to the fifth chamber 310 for storage through a pipe, while coolant is injected into the sixth chamber 320. Supported by the heat exchange between the fifth chamber 310 and the sixth chamber 320, the coffee liquid is stored at a preset temperature. If the temperature of the coolant in the second chamber 120, the fourth chamber 220 and the sixth chamber 320 is higher than the preset temperature during the entire process, the cooling device 400 is activated to circulate and cool the coolant in the circulation pipe 410, thereby ensuring that the temperature of the coolant is always within the preset temperature.

[0031] Compared with existing technologies, this application integrates the entire coffee cold extraction equipment in terms of cold water, extraction, and storage, and stores the coffee in a low-temperature environment in an anaerobic environment, thereby extending the shelf life of the extracted coffee juice. This makes the cold extraction of coffee more convenient and efficient in terms of time, temperature, and large-scale extraction, while also solving the problems of refrigeration and convenient storage in an anaerobic environment.

[0032] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 3 As shown, the cooling tank 100 includes a first tank body 130 and a second tank body 140. The first tank body 130 is fitted inside the second tank body 140. A first cavity 110 is disposed inside the first tank body 130, and a second cavity 120 is disposed between the first tank body 130 and the second tank body 140. A first pipe 150 is provided at the bottom of the first tank body 130, and an inlet 131 for injecting drinking water is provided at the first tank body 130. Preferably, the side wall material of the first tank body 130 is made of a material with a high thermal conductivity, the side wall of the second cavity 120 is honeycomb-shaped, and the side wall material of the second tank body 140 is made of a heat-insulating material. In this way, when drinking water fills the first cavity 110 through the inlet 131, the temperature of the drinking water in the first cavity 110 can reach a preset temperature, such as 1 to 2 degrees Celsius, by injecting coolant into the second cavity 120.

[0033] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 3 As shown, the extraction tank 200 includes a third tank body 250 and a fourth tank body 260. The third tank body 250 is fitted inside the fourth tank body 260. A third cavity 210 is disposed inside the third tank body 250. A fourth cavity 220 is disposed between the third tank body 250 and the fourth tank body 260. A second pipe 270 is provided on the side wall of the third tank body 250. The second pipe 270 passes through the fourth tank body 260 and communicates with a first pipe 150. A first pump body 280 is provided between the second pipe 270 and the first pipe 150. The first pump body 280 is used to pump drinking water from the first tank body 130 into the third tank body 250. The bottom of the three-canister body 250 is provided with a third pipe 290, and the top of the third-canister body 250 is provided with an inlet 251 for putting in coffee powder. Preferably, the side wall material of the third-canister body 250 is made of a material with a high thermal conductivity, the side wall of the fourth chamber 220 is honeycomb-shaped, and the side wall material of the fourth canister body 260 is made of heat-insulating material. In this way, when the cooled drinking water fills the third chamber 210 through the inlet 131, and coolant is injected into the fourth chamber 220, the entire cold extraction process can be carried out at a preset temperature under the heat exchange support of the third chamber 210 and the fourth chamber 220, so as to achieve constant temperature of the extraction process.

[0034] Furthermore, based on the above embodiments, combined with Figure 3 and Figure 4 As shown, the stirring mechanism 230 includes a stirring motor 231 and a stirring assembly 232. The stirring motor 231 is located above the third tank 250. The stirring assembly 232 is connected to the drive end of the stirring motor 231 and extends into the third chamber 210. The filter screen 240 is located at the bottom of the third chamber 210 and below the stirring assembly 232. When drinking water enters the third chamber 210 through the second pipe 270, and then coffee powder enters the third chamber 210 through the feed inlet 251, the stirring motor 231 is started to drive the stirring assembly 232 to rotate. After a long period of soaking and stirring, the coffee powder and drinking water in the third chamber 210 are cold-brewed and blended. Finally, after being filtered through the filter screen 240, the coffee liquid is discharged through the third pipe 290.

[0035] Furthermore, based on the above embodiments, combined with Figure 3 and Figure 4As shown, the stirring assembly 232 includes a support rod 232a, which is horizontally placed inside the third cavity 210 and connected to the drive end of the stirring motor 231. The stirring motor 231 can drive the support rod 232a to rotate. Several stirring rods 232b are vertically installed below the support rod 232a. A brush plate 232c is provided at the end of the stirring rod 232b away from the support rod 232a. The brush plate 232c contacts the upper surface of the filter screen 240. (Note: The last sentence appears to be incomplete and possibly refers to a specific application or application. It has been left as is.) The cold brew process is carried out in a warm environment (around 1 to 2 degrees Celsius). Under this environment, the blending speed between coffee powder and cold water is very fast, resulting in a large amount of coffee powder settling on the filter screen 240 and clogging it. When the support rod 232a rotates, it drives the brush plate 232c to rotate synchronously. In this case, the brush plate 232c not only stirs the cold water but also continuously washes the filter screen 240, thereby improving the blending efficiency and reducing the clogging problem of the filter screen 240.

[0036] Furthermore, based on the above embodiments, combined with Figure 3 and Figure 4 As shown, the stirring rod 232b consists of a cross-cutting rod 232d and a vertical cutting rod 232e. The vertical cutting rod 232e is provided with a vertical cutting plate 232f arranged along the length direction of the third cavity 210, and the cross-cutting rod 232d is provided with a cross-cutting plate 232g arranged along the width direction of the third cavity 210. When the stirring rod 232b moves in the water flow, the vertical cutting plate 232f cuts the water flow vertically along the length direction of the third cavity 210, and the cross-cutting plate 232g cuts the water flow horizontally along the width direction of the third cavity 210. Thus, when the brush plate 232c drives the water flow to rotate, the different cutting directions of the vertical cutting plate 232f and the cross-cutting plate 232g create turbulence in the water flow. This turbulence further improves the blending efficiency of coffee powder and cold water, thereby completing cold extraction in a shorter time.

[0037] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 3As shown, the storage tank 300 includes a fifth tank body 330 and a sixth tank body 340. The fifth tank body 330 is fitted inside the sixth tank body 340. A fifth cavity 310 is disposed inside the fifth tank body 330. A sixth cavity 320 is disposed between the fifth tank body 330 and the sixth tank body 340. A fourth pipe 350 is provided at the bottom of the fifth tank body 330. A carbon dioxide filling port 331 and a liquid outlet 332 are provided on the side wall of the fifth tank body 330. A pressure relief valve 333 is provided at the top of the fifth tank body 330. Preferably, the side wall material of the fifth tank body 330 is made of a material with a high thermal conductivity. The side wall of the sixth cavity 320 is honeycomb-shaped. The side wall material of the sixth tank body 340 is made of a heat-insulating material. The third pipe 290 and the fourth pipe 350 are connected to the first pipe 150, and a first valve 151 is provided on the first pipe 150. The third pipe 290 and the fourth pipe 350 are equipped with a second valve 351. Under normal conditions, the first valve 151 is open and the second valve 351 is closed, and the water flows directly from the first chamber 110 into the third chamber 210. When the cold brewing is completed, the first valve 151 is closed and the second valve 351 is opened. The fourth pipe 350 is connected to the third pipe 290. The coffee liquid formed after cold brewing needs to enter the fifth tank 330 of the storage tank 300 through the fourth pipe 350. At the same time, coolant is injected into the sixth chamber 320. With the support of the heat exchange between the fifth chamber 310 and the sixth chamber 320, the coffee liquid is stored at a preset temperature. At the same time, after the coffee liquid is injected into the fifth tank 330, carbon dioxide can be injected into the fifth tank 330 through the carbon dioxide filling port 331, thereby venting the air in the fifth tank 330 through the pressure relief valve 333, thus preventing the coffee liquid from growing bacteria in an aerobic environment.

[0038] Furthermore, based on the above embodiments, such as Figure 3 As shown, a fifth pipe 360 ​​is provided between the fifth cavity 310 and the second pipe 270. The fifth pipe 360 ​​is connected to both the fifth cavity 310 and the second pipe 270. A third valve 361 is provided on the fifth pipe 360. When the coffee liquid concentration in the storage tank 300 is high, the third valve 361 can be opened and cold water can be directly injected into the fifth cavity 310 to achieve the effect of directly diluting the coffee liquid in the fifth cavity 310.

[0039] Furthermore, based on the above embodiments, such as Figure 3 As shown, filter tanks 271 are provided in the second pipe 270 and the third pipe 290. The filter tanks 271 are used to further filter the cold water in the second pipe 270 and the coffee liquid in the third pipe 290. The working principle of the filter tanks 271 is existing technology and will not be described in detail here.

[0040] Furthermore, based on the above embodiments, such as Figure 5 As shown, the circulation pipeline 410 includes an outlet pipe 411 and an inlet pipe 412. One end of the outlet pipe 411 is connected to the refrigeration device 400, and the other end is connected to the side walls of the second chamber 120, the fourth chamber 220, and the sixth chamber 320, respectively. One end of the inlet pipe 412 is connected to the bottom of the second chamber 120, the fourth chamber 220, and the sixth chamber 320, and the other end is connected to the refrigeration device 400. A second pump body 413 and a solenoid valve 414 are installed on the inlet pipe 412. On one side of the refrigeration device 400... A control console 500 is provided. The solenoid valve 414 is electrically connected to the second pump body 413 and the control console 500. The second pump body 413 is used to circulate the coolant between the outlet pipe 411 and the inlet pipe 412. When the temperature is higher than the preset temperature, the solenoid valve 414 and the second pump body 413 send an electrical signal to the control console 500 to open the solenoid valve 414 and the second pump body 413. At the same time, the refrigeration device 400 is started to circulate and cool the coolant in the circulation pipe 410, thereby ensuring that the temperature of the coolant is always within the preset temperature.

[0041] The details of the above exemplary embodiments are provided, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A coffee cold extraction device, characterized in that, The system includes a cooling tank (100), which comprises a first cavity (110) and a second cavity (120) that are isolated from each other. An extraction tank (200) and a storage tank (300) are disposed on one side of the cooling tank (100). The storage tank (300) is disposed between the cooling tank (100) and the extraction tank (200). The extraction tank (200) comprises a third cavity (210) and a fourth cavity (220) that are isolated from each other. A stirring mechanism (23) is disposed in the third cavity (210). The storage tank (300) includes a fifth chamber (310) and a sixth chamber (320) that are isolated from each other. The first chamber (110), the third chamber (210) and the fifth chamber (310) are interconnected. A refrigeration device (400) is also provided on one side of the cooling tank (100). The refrigeration device (400) is used to provide coolant and is connected to the second chamber (120), the fourth chamber (220) and the sixth chamber (320) respectively through a circulation pipeline (410).

2. The coffee cold extraction apparatus according to claim 1, characterized in that, The cooling tank (100) includes a first tank body (130) and a second tank body (140). The first tank body (130) is fitted inside the second tank body (140). The first cavity (110) is disposed inside the first tank body (130). The second cavity (120) is disposed between the first tank body (130) and the second tank body (140). A first pipe (150) is provided at the bottom of the first tank body (130). An inlet (131) for injecting drinking water is provided in the first tank body (130).

3. The coffee cold extraction apparatus according to claim 2, characterized in that, The extraction tank (200) includes a third tank body (250) and a fourth tank body (260). The third tank body (250) is fitted inside the fourth tank body (260). The third cavity (210) is disposed inside the third tank body (250). The fourth cavity (220) is disposed between the third tank body (250) and the fourth tank body (260). A second pipe (270) is provided on the side wall of the third tank body (250). The second pipe (270) passes through the fourth tank body (260) and communicates with the first pipe (150). A first pump body (280) is provided between the second pipe (270) and the first pipe (150). A third pipe (290) is provided at the bottom of the third tank body (250). An inlet (251) is provided at the top of the third tank body (250).

4. The coffee cold extraction apparatus according to claim 3, characterized in that, The stirring mechanism (230) includes a stirring motor (231) and a stirring assembly (232). The stirring motor (231) is located above the third tank (250). The stirring assembly (232) is connected to the driving end of the stirring motor (231) and extends into the third cavity (210). The filter screen (240) is located at the bottom of the third cavity (210) and below the stirring assembly (232).

5. The coffee cold extraction apparatus according to claim 4, characterized in that, The stirring assembly (232) includes a support rod (232a), which is horizontally placed in the third cavity (210) and connected to the drive end of the stirring motor (231). The stirring motor (231) can drive the support rod (232a) to rotate. Several stirring rods (232b) are vertically installed below the support rod (232a). A brush plate (232c) is provided at the end of the stirring rod (232b) away from the support rod (232a). The brush plate (232c) is in contact with the upper surface of the filter screen (240).

6. The coffee cold extraction apparatus according to claim 5, characterized in that, The stirring rod (232b) consists of a cross-cutting rod (232d) and a vertical cutting rod (232e). The vertical cutting rod (232e) is provided with a vertical cutting plate (232f) arranged along the length direction of the third cavity (210). The cross-cutting rod (232d) is provided with a cross-cutting plate (232g) arranged along the width direction of the third cavity (210). When the stirring rod (232b) moves in the water flow, the vertical cutting plate (232f) vertically cuts the water flow along the length direction of the third cavity (210), and the cross-cutting plate (232g) horizontally cuts the water flow along the width direction of the third cavity (210).

7. The coffee cold extraction apparatus according to claim 6, characterized in that, The storage tank (300) includes a fifth tank body (330) and a sixth tank body (340). The fifth tank body (330) is fitted inside the sixth tank body (340). The fifth cavity (310) is disposed inside the fifth tank body (330). The sixth cavity (320) is disposed between the fifth tank body (330) and the sixth tank body (340). A fourth pipe (350) is provided at the bottom of the fifth tank body (330). A carbon dioxide filling port (331) and a liquid outlet (332) are provided on the side wall of the fifth tank body (330). A pressure relief valve (333) is provided at the top of the fifth tank body (330). The third pipe (290) and the fourth pipe (350) are connected to the first pipe (150) respectively. A first valve (151) is provided on the first pipe (150). A second valve (351) is provided on the third pipe (290) and the fourth pipe (350).

8. The coffee cold extraction apparatus according to claim 3, characterized in that, A fifth pipe (360) is provided between the fifth cavity (310) and the second pipe (270). The fifth pipe (360) is connected to the fifth cavity (310) and the second pipe (270) respectively. A third valve (361) is provided on the fifth pipe (360).

9. The coffee cold extraction apparatus according to claim 8, characterized in that, Filter tanks (271) are provided in the second pipe (270) and the third pipe (290).

10. The coffee cold extraction apparatus according to claim 1, characterized in that, The circulation pipeline (410) includes an outlet pipe (411) and an inlet pipe (412). One end of the outlet pipe (411) is connected to the refrigeration device (400), and the other end is connected to the side walls of the second cavity (120), the fourth cavity (220), and the sixth cavity (320), respectively. One end of the inlet pipe (412) is connected to the bottom of the second cavity (120), the fourth cavity (220), and the sixth cavity (320), and the other end is connected to the refrigeration device (400). A second pump body (413) and a solenoid valve (414) are installed on the inlet pipe (412). A control console (500) is provided on one side of the refrigeration device (400). The solenoid valve (414) is electrically connected to the second pump body (413) and the control console (500).

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