WO2020125644A1

WO2020125644A1 - Coffee cold brew apparatus and method for cold brewing coffee

Info

Publication number: WO2020125644A1
Application number: PCT/CN2019/126057
Authority: WO
Inventors: 利毅刚; 严继成; 黄婉珊; 曾永松
Original assignee: 中山市领先电器有限公司
Priority date: 2018-12-19
Filing date: 2019-12-17
Publication date: 2020-06-25
Also published as: CN109528005A

Abstract

A coffee cold brew apparatus and a method for cold brewing coffee; the coffee cold brew apparatus comprises a first container (1) used for holding a water solution and a second container (2) used for holding coffee, wherein an upper part of the first container communicates with the outside, the second container is a sealed container, bottom parts of the first container (1) and the second container (2) communicate with on another by means of a communication piece (5), and an upper part of a side wall of the second container (2) is connected to a gas pump (4) that may vacuum the inside of the second container (2) to form negative pressure, thereby pumping the water solution within the first container (1) into the second container, and applying air pressure to the inside of the second container (2) to reversingly press the water solution pumped into the second container (2) back into the first container (1). Since manners of negative pressure suction and reverse pressure are used, by means of repeatedly brewing coffee, the extraction speed is increased, cold breweing efficiency is high, and each component is convenient to disassemble and clean.

Description

Coffee cold extraction device and cold extraction coffee method

Technical field

The invention relates to the technical field of coffee brewing, in particular to a cold coffee extraction device and a cold coffee extraction method.

Background technique

Today's coffee machines use crushed and heated water to make coffee. Brewing hot water will decompose the tannic acid in the coffee and affect the taste. The ground coffee powder is soaked in cold water and then extracted. During the process, because the coffee powder does not contact the direct hot water, the tannic acid in it will almost not be decomposed, so the taste will be particularly pure, smooth, and without sour taste.

Cold water soaked coffee powder generally adopts the method of cold extraction, so that the active ingredients in the coffee powder are leached into cold water, and the method of static extraction is generally used, the efficiency will be relatively low, and after extraction, the coffee powder and coffee liquid are fused together and need to be filtered Before drinking. To this end, the applicant has invented the patent application technology.

Summary of the invention

The purpose of the invention is to provide a coffee cold extraction device with high cold extraction efficiency and a method for cold extraction coffee.

A coffee cold extraction device, characterized in that it includes a first container for containing water and a second container for containing coffee, an upper portion of the first container is in communication with the outside world, and the second container is a sealed container , The bottom of the first container and the second container are connected by a connecting member; the upper part of the side wall of the second container is connected with a vacuum that can be evacuated in the second container to form a negative pressure to pump the water in the first container The second container and applying air pressure to the second container reversely press the water pumped into the second container back to the air pump in the first container.

A coffee cold extraction device as described above, characterized in that a coffee filter assembly that prevents coffee from being pumped into the first container is provided in the communication member and/or the second container.

A coffee cold extraction device as described above, characterized in that: a second container for containing coffee is provided in the second container, the third container is provided independently, and the third container is placed in the first container to repeatedly enter and exit water In the water flow channel in the second container, the outer wall of the third container has a filter structure for the water in the first container to enter and exit the cold extraction coffee in the third container.

A coffee cold extraction device as described above, characterized in that the second container is placed in the first container, the bottom surface of the second container has an opening in the middle, and the upper part of the communication member is removed from the center opening in the bottom connection.

As described above, a coffee cold extraction device is characterized in that the second container is located separately from the first container, and the communication member is detachably connected to the first container and the second container.

As described above, a coffee cold extraction device is characterized in that the communicating member is a hose, and a pipe clamp is provided on the communicating member.

A coffee cold extraction device as described above, characterized in that the communication member is a hard tube, a connection hole is provided on one side of the bottom of the first container, and a valve is provided in the connection hole. The inside of the first container is in communication.

The method of cold extracting coffee by the coffee cold extracting device as described above is characterized by:

Step 1: Inject sufficient water into the first container;

Step 2: The air pump draws from the second container and forms a negative pressure in the second container, and the water in the first container is sucked into the second container through the communication member under the action of the negative pressure;

Step 3: Keep soaking for 0.5-10 minutes;

Step 4: The air pump injects air pressure into the second container by controlling the reverse flow direction of the switch, and the water in the second container is pressed into the first container through the connecting member under the action of the air pressure;

Step 5: Repeat Step 2, Step 3 and Step 4, the air pump repeatedly pumps the water in the first container into and out of the second container until the set number of times is reached, and the cold extraction of coffee is completed.

As mentioned above, a method for cold extracting coffee is characterized in that the control switch can be kept switched at intervals of 0.5-10 minutes under controlled conditions.

A method for cold extracting coffee as described above is characterized in that the first container is fitted with an ice water connector and a hot water connector.

Compared with the prior art, the present invention has the following advantages:

1. The present invention adopts negative pressure suction and reverse pressurization methods. For the preparation process of ice coffee, this application repeatedly brews coffee multiple times to speed up extraction, increase extraction speed, and speed up the preparation process of ice coffee. In the prior art, by soaking or slow dropping for a long time, the technical solution of the present application is especially for water at or below room temperature, such as ice water, which can achieve the same extraction effect in a short time, cold extraction High efficiency, it is actually an improved coffee extraction device and cold extraction coffee method.

2. When the present invention requires cleaning, the air pump and the second container, the second container and the sealing cover, the third container and the top cover, and the connecting member can be disassembled from the first container and the second container, which is convenient for disassembly and cleaning.

BRIEF DESCRIPTION

1 is a schematic diagram of an exploded structure of Example 1 of the present invention;

2 is a schematic structural view of Embodiment 1 of the present invention;

3 is a schematic diagram of the pumping state of the air pump according to Embodiment 1 of the present invention;

4 is a schematic diagram of the state of inflation of the air pump according to Embodiment 1 of the present invention;

5 is a schematic diagram of an exploded structure of Example 2 of the present invention;

6 is a schematic structural view of Embodiment 2 of the present invention;

7 is a schematic diagram of the pumping state of the second embodiment of the present invention;

8 is a schematic diagram of the state of inflation of the air pump according to Embodiment 2 of the present invention;

9 is a schematic structural view of the water valve inside the communication member in Embodiment 1;

FIG. 10 is a schematic diagram of the structure of the pipe clamp on the communicating member in Embodiment 2. FIG.

Among them, 1, the first container; 11, the connection sleeve; 12, the bump; 2, the second container; 21, the sealing cover; 22, the bottom surface; 23, the support foot; 231, the lateral through hole; 24, the step; 3 3. Third container; 31. Top cover; 311. Clamping block; 32. Flanging; 4. Air pump; 41. Control switch; 5. Connecting piece; 51. Connection joint; 52. Pipe clamp; Hole; 54, water valve; 541, spool; 55, control rod; 56, spring; 6, filter assembly.

detailed description

The present invention will be further described below with reference to the drawings.

As shown in FIGS. 1 to 10, a coffee cold extraction device includes a first container 1 for holding water and a second container 2 for holding coffee, an upper portion of the first container 1 communicates with the outside world, and a second container 2 is a sealed container, and the bottom of the first container 1 and the second container 2 are communicated through a connecting member 5; the upper part of the side wall of the second container 2 is connected with a vacuum that can form a negative pressure in the second container 2 to connect the first container The water liquid in 1 is pumped into the second container 2 and air pressure is applied to the second container 2 to reversely press the water liquid pumped into the second container 2 back to the air pump 4 in the first container 1.

In this application, the first container 1 is fitted with an ice water connector and a hot water connector.

In the present application, the air pump 4 is provided with a control switch 41 for controlling the direction of reversed air flow.

The air pump 4 is an electric air pump, and there are various implementations of the control switch 41. The specific implementation of the control switch 41 is not a limitation of the protection scope of the present application.

A specific embodiment of the control switch 41: for example, a controller and two relays can be used to control the forward rotation and reverse rotation of the electric air pump motor. One relay is used to control the forward rotation of the air pump 4 motor, and the other relay is used to control the reverse rotation of the air pump 4 motor. When the flow direction of the air flow is reversed, the controller controls one relay to be opened, and the motor of the air pump 4 is stopped. Subsequently, the controller controls another relay to be closed, and the motor of the air pump 4 is operated again, so that the air flow direction of the air pump 4 is reversed.

In addition to the above-mentioned embodiments, it can also be implemented by using a control switch in the prior art or a control switch purchased from the market.

In the present application, a bottle mouth is provided on the upper end of the second container 2, the bottle mouth is connected with a sealing cap 21 by a screw, and a sealing ring is provided between the bottle mouth and the sealing cap 21. The screw connection facilitates the separation of the second container 2 and the sealing cover 21, and facilitates the disassembly and cleaning. The sealing ring makes the connection of the sealing cover 21 and the second container 2 tight without leaking.

In this application, the upper end of the side wall of the second container 2 is provided with an air pump mounting portion, and the air pump 4 is inserted into the air pump mounting portion through an air tube. It is convenient to remove the air pump 4 from the second container 2 when cleaning is needed. The air pump 4 can draw and inflate the second container 2 and change the air pressure in the second container 2 to provide power for the coffee liquid to flow back and forth between the first container 1 and the second container 2.

The maximum liquid level of the second container 2 is lower than that of the air pump installation. The maximum liquid level position of the second container 2 refers to the highest position that the coffee liquid in the second container 2 continuously rises during the flow of the coffee liquid from the first container 1 into the second container 2 and the coffee liquid can reach. The specific implementation manner is as follows: the first type: the volume of the first container 1 is smaller than the volume of the second container 2. The second type: a liquid level sensor is provided in the second container 2. When the coffee liquid enters the second container 2 and the liquid level reaches the set maximum value, the liquid level sensor transmits a signal to the controller of the control switch 41, the controller passes The control switch 41 controls the air pump to stop drawing air from the second container 2.

In the present application, a coffee filter assembly 6 that prevents coffee from being pumped into the first container 1 is provided in the communication member 5 and/or the second container 2.

In this application, the filter assembly 6 is a filter screen.

In the present application, the second container 2 has a third container 3 for holding coffee. The third container 3 is provided independently. The third container 3 is placed in the water flow channel in the first container 1 where water repeatedly enters and exits the second container 2 The outer wall of the third container 3 has a filter structure for the water in the first container 1 to enter and exit the cold extraction coffee in the third container 3.

The top of the third container 3 is provided with a detachable top cover 31. On the inner side of the top cover 31, there is a locking block 311 which can just fit the top cover 31 on the mouth of the third container 3, which is convenient for the third container 3 and the top cover 31. Separated, easy to disassemble and clean.

In the present application, a step 24 is provided at the lower part of the side wall of the inner cavity of the second container 2, and a flange 32 that can be hung on the step 24 is provided on the upper edge of the side wall of the third container 3. It is convenient to take out the third container 3 from the second container 2 when cleaning is needed.

In the present application, the first container 1 and the second container 2 are connected by a communication member 5 in different communication modes. Two embodiments are provided below. Of course, other embodiments may be implemented in addition to the following two embodiments.

Example 1:

As shown in FIGS. 1, 2, 3 and 4, the second container 2 is placed in the first container 1, and the bottom 22 of the second container 2 has an opening in the middle, and the upper part of the connecting member 5 is disconnected from the opening in the middle of the bottom 22 .

The specific structure is as follows: the outer circumference of the bottom of the second container 2 extends downward to form an annular support leg 23, and a connecting sleeve 11 is provided at the middle of the inner bottom of the inner cavity of the first container 1, and the lower end of the connecting sleeve 11 is connected to the first container 1 The inner side of the bottom of the inner cavity is connected as a whole, and the supporting legs 23 are clipped downwardly in the connecting sleeve 11 to fix the first container 1. The supporting legs 23 are provided with lateral through holes 231 for the coffee liquid to flow through. Both ends of the hole 231 laterally penetrate through the two side walls of the support leg 23 to communicate with the first container 1.

The connecting member 5 is a tube penetrating through the center. The connecting member 5 is vertically arranged. The upper end of the connecting member 5 is covered with a coffee filter assembly 6. The bottom of the connecting member 5 abuts against the bottom of the inner cavity of the first container 1. The connecting member 5 is provided with The lateral through holes 231 are coaxially provided with the second lateral through holes 53.

In this application, the specific structure of the disassembly connection between the upper part of the communication member 5 and the middle opening of the bottom surface 22 is as follows: The first type: the upper part of the communication member 5 is screwed with the inner ring of the middle opening of the bottom surface 22. The second type: the upper outer wall of the communication member 5 is sleeved in the middle opening of the bottom surface 22, and a sealing ring is provided between the upper outer wall of the communication member 5 and the inner opening of the middle opening of the bottom surface 22.

The upper part of the communication member 5 is detachably connected to the opening in the middle of the bottom surface 22, which is convenient for the disassembly, assembly, cleaning of the first container 1 and the second container 2.

In the present application, a water valve 54 with a control lever 55 (as shown in FIG. 9) is provided in the communication member 5, the outer end of the control lever 55 extends downward, and the first container 1 is provided When a container 1 is pressed, the control lever 55 is pressed to control the conduction of the water valve 54 and the restriction of the control lever 55 is lifted when the second container 2 is lifted up from the first container 1, and the control lever 55 is automatically reset by the spring to control the water The convex position of the valve 54 is closed.

The specific structure is as follows: a convex block 12 is provided inside the center of the bottom of the inner cavity of the first container 1, a water valve 54 for controlling its opening and closing is provided in the communication member 5, and the water valve 54 is provided with a control along the center direction of the communication member 5 The rod 55, the control rod 55 and the water valve 54 are axially slidingly fitted, the inner end of the control rod 55 is connected to the spool 541 of the water valve 54, the outer end of the control rod 55 extends downward, and the outer end of the control rod 55 is between the water valve 54 A spring 56 capable of driving the control rod 55 to slide down and reset to close the water valve 54 is provided. The spring 56 is sleeved on the control rod 55. One end of the spring 56 presses against the water valve 54 and the other end of the spring 56 presses against the control rod 55. On the outer end.

In use, when the second container 2 is inserted into the inner cavity of the first container 1, the bottom support legs 23 of the second container 2 are snapped into the connecting sleeves 11 on the first container 1, and the protrusion 12 presses upward The downward moving control rod 55 causes the control rod 55 to move axially upward relative to the water valve 54, the control rod 55 drives the valve core 541 to move upward, and the water valve 54 conducts. When the second container 2 is taken out from the inner cavity of the first container 1, the second container 2 and the water valve 54 at the bottom of the container move upward together, and the control rod 55 moves upward away from the projection 12, releasing the projection 12 from the control rod 55 Limit, the control rod 55 moves axially downward relative to the water valve 54 under the tension of the spring 57, the control rod 55 drives the spool 541 downward, and the water valve 54 closes, so that the water in the first container 1 cannot be introduced into the first In the second container 2, when the second container 2 is removed from the inner first container 1, the water in the first container 1 is poured back into the second container 2. The structure is simple and practical.

Working process: Put the second container 2 into the first container 1 and connect it through the connecting member 5, the second container 2 is connected to the air pump 4; fill the third container 3 with the required coffee powder and cover the top cover 31, Put the third container 3 into the second container 2 and close the sealing lid 21; fill the first container 1 with water of a corresponding proportion. The air pump 4 is used to draw air from the second container 2 to generate a negative pressure in the second container 2. Under the effect of atmospheric pressure, the water in the first container 1 is completely injected into the second container 2 and the coffee powder in the second container 2 Contact with cold bubbles; then the air pump 4 pumps into the second container 2 to make the air pressure in the second container 2 higher than the first container 1, so that the coffee liquid in the second container 2 flows into the first container 1 and circulates in turn, according to your needs The coffee strength increases the number of cycles. When the required coffee strength is reached, the air pump 4 is turned off, and the second container 2 is taken out from the first container 1 bottle mouth.

Example 2:

As shown in FIG. 5, FIG. 6, FIG. 7 and FIG. 8, the second container 2 is located separately from the first container 1, and the connecting member 5 is disconnected from the first container 1 and the second container 2.

The specific structure is as follows: a connection joint 51 is provided at both ends of the communication member 5, and the lower side walls of the first container 1 and the second container 2 are bored. The connection joints 51 at the two ends of the communication member 5 are respectively connected to the first container 1 and the second container 2 The lower side wall is threaded at the opening. The screw connection method facilitates the separation of the communication member 5 from the first container 1 and the second container 2, and is convenient for disassembly and cleaning.

In the present application, a structure that blocks the flow of coffee liquid from the first container 1 into the second container 2 is provided on the connecting member 5 or the first container 1, the specific structure is as follows: The first type: the connecting member 5 is a hose, the connecting member 5 is provided with a pipe clamp 52 (as shown in FIG. 10). The second type: the connecting member 5 is a hard tube, and a connecting hole is provided on the bottom side of the first container 1, a valve is provided in the connecting hole, and the connecting member 5 communicates with the inside of the first container 1 through the valve.

When the required coffee strength is reached and all the coffee liquid flows into the first container 1, the pipe clamp 53 or the valve is closed.

Working process: Connect the first container 1 and the second container 2 through the connecting member 5, the second container 2 is connected to the air pump 4; fill the third container 3 with the required coffee powder, cover the top cover 31, the third Put the container 3 into the second container 2 and close the sealing lid 21; fill the first container 1 with water of corresponding proportion. Open the pipe clamp 53 or valve, and use the air pump 4 to draw air from the second container 2 to make the second container 2 generate a negative pressure. The water in the first container 1 is injected into the second container 2 under the action of atmospheric pressure. The coffee powder in the second container 2 contacts the cold bubble; then the air pump 4 pumps into the second container 2 to make the air pressure in the second container 2 higher than the first container 1, so that the coffee liquid in the second container 2 flows into the first container 1, Cycle in turn, increasing the number of cycles based on the coffee strength you need. When the required coffee strength is reached and all the coffee liquid flows into the first container 1, the pipe clamp 53 or valve is closed, and the air pump 4 is turned off.

In Example 1 and Example 2, coffee powder may be directly charged into the second container 2 without using the third container 3.

When cleaning is needed, the air pump 4 and the second container 2, the second container 2 and the sealing cover 21, the third container 3 and the top cover 31, and the communication member 5 are removed from the first container 1 and the second container 2 for cleaning.

A method for cold extracting coffee by using the above coffee cold extracting device:

Step 1: Inject sufficient water into the first container 1;

Step 2: The air pump 4 draws from the second container 2 and forms a negative pressure in the second container 2, the water in the first container 1 is sucked into the second container 2 through the communication member 5 under the negative pressure ;

Step 3: Keep soaking for 0.5-10 minutes;

Step 4: The air pump 4 injects air pressure into the second container 2 through the reverse flow direction of the control switch 41, and the water in the second container 2 is pressed into the first container 1 through the communication member 5 under the action of the air pressure;

Step 5: Repeat Step 2, Step 3, and Step 4, the air pump 4 repeatedly pumps the water in the first container 1 into and out of the second container 2 until the set number of times is reached, and cold coffee extraction is completed.

In the present application, the control switch 41 can be kept switched at intervals of 0.5-10 minutes under controlled conditions. This can ensure the control of the brewing time of cold extraction coffee.

The invention is not only applicable to cold brew coffee, but also applicable to other products that need to be brewed and filtered.

The present invention has been described in detail above in conjunction with the embodiments of the accompanying drawings. Those of ordinary skill in the art can make various changes to the present invention based on the above description. Therefore, certain details in the embodiments should not constitute a limitation on the present invention, and the scope of the present invention will be defined by the appended claims as the protection scope of the present invention.

Claims

A coffee cold extraction device is characterized by comprising a first container (1) for containing water and a second container (2) for containing coffee, the upper part of the first container (1) is in communication with the outside world, The second container (2) is a sealed container, and the bottom of the first container (1) and the second container (2) are communicated through a connecting member (5); the upper part of the side wall of the second container (2) Connected to the second container (2) can be evacuated to form a negative pressure to pump the water in the first container (1) into the second container (2) and apply air pressure to the second container (2) to pump The water entering the second container (2) is reversely pressed back to the air pump (4) in the first container (1).
The coffee cold extraction device according to claim 1, characterized in that: the communicating member (5) and/or the second container (2) are provided with a device for preventing coffee from being pumped into the first container (1) Coffee filter assembly (6).
The coffee cold extraction device according to claim 1, characterized in that the second container (2) has a third container (3) for containing coffee, the third container (3) is independently provided, and the third container (3) The liquid in the first container (1) repeatedly enters and exits the water flow channel in the second container (2), and the outer wall of the third container (3) has water for the first container (1) The liquid enters and exits the filter structure of the cold extraction coffee in the third container (3).
The coffee cold extraction device according to claim 1, characterized in that the second container (2) is placed in the first container (1), and the bottom surface (22) of the second container (2) is opened in the middle Hole, the upper part of the communicating member (5) is detachably connected with the middle opening of the bottom surface (22).
The coffee cold extraction device according to claim 1, characterized in that: the second container (2) is located separately from the first container (1), and the communicating member (5) and the first container (1). Disconnect the second container (2).
The coffee cold extraction device according to claim 5, characterized in that the communicating member (5) is a hose, and the communicating member (5) is provided with a pipe clamp (52).
A coffee cold extraction device according to claim 5, characterized in that the communicating member (5) is a hard tube, and a connection hole is provided on the bottom side of the first container (1), and a connection hole is provided in the connection hole For the valve, the communicating member (5) communicates with the inside of the first container (1) through the valve.
A method for cold extracting coffee by using the cold coffee extracting device according to claim 1, characterized in that:

Step 1: Inject sufficient water into the first container (1);

Step 2: The air pump (4) draws from the second container (2) and forms a negative pressure in the second container (2), and the water in the first container (1) passes through the connecting member under the negative pressure (5) Inhaled into the second container (2);

Step 3: Keep soaking for 0.5-10 minutes;

Step 4: The air pump (4) injects air pressure into the second container (2) through the reverse flow of the control switch (41), and the water in the second container (2) is passed through the connecting member (5) under the action of air pressure Press into the first container (1);

Step 5: Repeat Step 2, Step 3 and Step 4, the air pump (4) repeatedly pumps the water in the first container (1) into and out of the second container (2) until the set number of times is reached, and the cold extraction coffee is completed .
The method for cold extracting coffee according to claim 8, characterized in that the control switch (41) can be kept switched at intervals of 0.5-10 minutes under controlled conditions.
The method for cold extracting coffee according to claim 8, characterized in that the first container (1) is fitted with an ice water connector and a hot water connector.