CN115281525B

CN115281525B - Coffee machine

Info

Publication number: CN115281525B
Application number: CN202210812419.1A
Authority: CN
Inventors: 郭建刚; 游军; 颜志峰
Original assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Current assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2024-05-24
Anticipated expiration: 2042-07-11
Also published as: CN115281525A

Abstract

The invention provides a coffee machine which comprises a machine body, a fixed brewing head, a driving assembly, a movable brewing assembly, a water supply assembly and a control device. The movable brewing component is driven by the driving component to have at least a first position, a second position and a third position relative to the fixed brewing head in the machine body. The control device is configured to control the water supply assembly to supply a first volume of pre-soaking wet liquid into the brewing cavity after controlling the driving assembly to enable the movable brewing assembly to be in a first position; after the preliminary soaking is finished, the driving assembly is controlled to enable the movable brewing assembly to move from the second position to the third position to execute the powder pressing action, and the water supply assembly is controlled in the process to enable the water supply assembly to supply a second volume of pre-soaking wet liquid into the brewing cavity so as to secondarily soak the powder food materials which are not compacted in the brewing cavity. The structure ensures that the coffee extraction can achieve better and stable effect through the secondary soaking of the powdery food material, thereby improving the taste of the coffee liquid.

Description

Coffee machine

Technical Field

The invention relates to the technical field of coffee manufacture, in particular to a coffee machine.

Background

Along with the continuous improvement of the living standard of people, the types of the full-automatic coffee machines in the current market are more and more, and when the full-automatic coffee machines in the current market brew coffee, if the coffee is brewed by directly passing through water, the taste of the coffee can be influenced, so that the taste of the coffee is sour and astringent. The chinese patent with publication number CN208692978U discloses an automatic french press coffee machine, which comprises a cup body and a coffee basket arranged in the cup body, wherein the coffee basket is used for placing coffee powder, a stirring blade is arranged in the coffee basket, and a corresponding driving motor is used for driving the stirring blade to rotate in the coffee basket. As can be seen, the automatic french press coffee machine directly infuses the coffee grounds in the coffee basket, there is no pre-wetting process before, which greatly affects the mouthfeel of the coffee liquor, resulting in poor user experience.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a coffee machine, which can achieve better and stable effect of coffee extraction through secondary soaking of powdery food materials, thereby improving the taste of coffee liquid.

The embodiment of the invention provides a coffee machine, which comprises a machine body, a fixed brewing head and a driving assembly, wherein the fixed brewing head and the driving assembly are arranged in the machine body, and the coffee machine further comprises:

The movable brewing assembly is arranged in the machine body and is connected with the driving assembly, the movable brewing assembly comprises a shell, a first opening is formed on one side, facing the fixed brewing head, of the shell, the fixed brewing head seals the first opening to enable the inner cavity of the shell and the fixed brewing head to be enclosed together to form a brewing cavity, the movable brewing assembly is driven by the driving assembly to have at least a first position, a second position and a third position relative to the fixed brewing head in the machine body, the fixed brewing head is positioned at the first opening in the first position, the fixed brewing head stretches into the inner cavity of the shell from the first opening to a first depth in the second position, and the fixed brewing head stretches into the inner cavity of the shell from the first opening to a second depth in the third position, and the second depth is larger than the first depth;

A water supply assembly in communication with the brewing chamber through the stationary brewing head for providing the brewing chamber with a pre-wetting liquid and a brewing liquid via the stationary brewing head;

The control device is electrically connected with the driving assembly and the water supply assembly respectively, and is configured to control the water supply assembly to supply a first volume of pre-soaking wet liquid into the brewing cavity after controlling the driving assembly to enable the movable brewing assembly to be in a first position so as to preliminarily soak powdery food materials in the brewing cavity through the pre-soaking wet liquid;

And after the preliminary soaking is finished, controlling the driving assembly to enable the movable brewing assembly to move to a second position and move from the second position to a third position, and controlling the water supply assembly to supply a second volume of pre-soaking wet liquid into the brewing cavity in the process that the movable brewing assembly moves from the second position to the third position to execute the powder pressing action, so as to secondarily soak the powder food materials which are not compacted in the brewing cavity. The structure ensures that the coffee extraction can achieve better and stable effect through the secondary soaking of the powdery food material, thereby improving the taste of the coffee liquid.

In some embodiments, the control device is further configured to: and when the secondary soaking is finished and the movable brewing assembly is positioned at the third position, controlling the water supply assembly to supply brewing liquid into the brewing cavity so as to brew the food materials after the secondary soaking. Therefore, after the powdery food material is pre-soaked, the food material is brewed by the brewing liquid to obtain the coffee liquid with better taste.

In some embodiments, the ratio of the first volume to the sum of the first volume and the second volume is 1: 3-1:2. The ratio can enable the first-stage pre-soaking and the second-stage pre-soaking to achieve better soaking effects.

In some embodiments, the ratio of the sum of the first and second volumes to the weight of powdered food stuff within the brewing chamber is 1:1.5 to 1:0.8. The ratio of the sum of the first volume and the second volume to the weight of the powdery food material in the brewing cavity can achieve a better extraction effect on the powdery food material through a certain amount of pre-soaking wet liquid.

In some embodiments, the ratio of the distance from the first location to the second location to the distance from the first location to the third location is in the range of 0.7 to 0.95. The ratio range of the distances can be contacted with the second volume of pre-soaking liquid in a semi-loose state without completely compacting the powdery food materials, so that a better extraction effect is achieved.

In some embodiments, the control device is further configured to send a stop signal to the water supply assembly after the movable brewing assembly is controlled to move to the third position and the second volume of pre-soaking wet liquid is supplied, and control the water supply assembly to supply the brewing liquid to the brewing cavity after a preset time, so that the purpose of fully contacting the pre-soaking wet liquid with the food material is achieved.

In some embodiments, the control device is further configured to obtain an amount of infusion fluid that the water supply assembly supplies into the infusion chamber; and controlling the water supply assembly to stop supplying the brewing liquid when the feeding amount reaches a preset value. Therefore, when a fixed amount of brewing liquid is provided in the brewing cavity, the water supply assembly is timely controlled to stop, so that a better brewing effect is achieved, and a coffee liquid with better taste is obtained.

In some embodiments, the movable brewing assembly is driven by the driving assembly to further have a fourth position relative to the fixed brewing head in the body, and the fixed brewing head is separated from the first opening in the fourth position; the control device is further configured to: and under the condition that brewing is finished, controlling the driving assembly to enable the movable brewing assembly to move from the third position to the fourth position, enabling the movable brewing assembly to be far away from the fixed brewing head, and discharging residues in the brewing cavity. The structure can realize automatic slag discharge through the movement of the movable brewing assembly, and is convenient for users to use.

In some embodiments, the coffee machine further comprises a push rod assembly movably arranged in the brewing cavity, the push rod assembly and the machine body can be mutually locked or unlocked, and in the first position, the push rod assembly is locked on the machine body and positioned at one side, away from the fixed brewing head, in the brewing cavity; when the movable brewing assembly moves between the first position and the second position and between the second position and the third position, the push rod assembly is unlocked on the machine body and moves along with the movable brewing assembly, and the push rod assembly is positioned at one side, away from the fixed brewing head, in the brewing cavity; the movable brewing assembly is in a fourth position, and the push rod assembly is locked to the machine body and located at the first opening of the shell. The structure is simple, and the connection is stable.

In some embodiments, the coffee machine further comprises a sliding pull rod assembly, the sliding pull rod assembly comprises a fixing frame and a pull rod, the fixing frame is fixedly connected with the machine body, the pull rod is connected with one end, far away from the fixed brewing head, of the push rod assembly and is connected to the fixing frame in a sliding manner, one of the fixing frame and the pull rod is provided with a locking pin, the other one of the fixing frame and the pull rod is provided with a locking groove, and when the pull rod slides relative to the fixing frame so that the locking pin stretches into the locking groove, the locking pin is locked; when the push rod component pulls the pull rod, the locking pin is separated from the locking groove, and the locking pin and the locking groove are unlocked. The structure enables the push rod assembly to be effectively unlocked and locked with the machine body, and the structure stability is good.

Compared with the prior art, the embodiment of the invention has the beneficial effects that: according to the invention, the movable brewing assembly is driven by the driving assembly to be in a specific first position, a specific second position and a specific third position, the control device can control the driving assembly to enable the movable brewing assembly to be in the first position, then control the water supply assembly to supply a first volume of pre-soaking liquid into the brewing cavity, so that the powder food in the brewing cavity is pre-soaked through the pre-soaking liquid, namely, the first-stage pre-soaking is realized, and the control device can also control the water supply assembly to supply a second volume of pre-soaking liquid into the brewing cavity in the process that the movable brewing assembly moves from the second position to the third position to execute the powder pressing action, so that the non-compacted powder food in the brewing cavity is secondarily soaked, namely, the second-stage pre-soaking is realized, and the coffee extraction can achieve a better and stable effect through the two-stage pre-soaking, so that the taste of the coffee liquid is improved. And the second-stage pre-wetting is realized in the process of the powder pressing action, and the second-stage pre-wetting injection second volume of pre-wetting liquid is pressurized through the powder pressing action, so that the pre-wetting liquid in the second-stage pre-wetting injection can be uniformly and fully mixed with the powdery food, and the pre-wetting liquid can be quickly absorbed by the powdery food, thereby further improving the taste of the coffee liquid.

Drawings

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.

FIG. 1 is a cross-sectional view of a coffee machine according to an embodiment of the present invention, showing a movable brewing assembly in a first position;

FIG. 2 is a cross-sectional view of a coffee machine according to an embodiment of the present invention showing the movable brewing assembly in a second position;

FIG. 3 is a cross-sectional view of a coffee machine according to an embodiment of the present invention showing the movable brewing assembly in a third position;

FIG. 4 is a schematic workflow diagram of a control device of a coffee machine according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a coffee machine according to an embodiment of the present invention showing the movable brewing assembly in a fourth position;

FIG. 6 is a schematic view of a movable brewing assembly of a coffee machine according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a movable brewing assembly of a coffee machine in accordance with an embodiment of the present invention.

The reference numerals in the drawings denote components:

1-a machine body; 2-fixing the brewing head; 3-a drive assembly; 4-a movable brewing assembly; 41-a housing; 42-a first opening; 43-brewing chamber; 44-a powder receiving port; 5-a water supply assembly; 51-a water pump; 52-a water tank; 53-heating pot; 6-a push rod assembly; 7-a sliding pull rod assembly; 71-a fixing frame; 72-a pull rod; 73-locking pins; 74-locking grooves; 8-bean grinding components; 9-a liquid outlet.

Detailed Description

The present invention will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present invention.

The embodiment of the invention provides a coffee machine. As shown in fig. 1 to 3, the coffee maker comprises a body 1, a fixed brewing head 2 and a driving assembly 3 which are arranged in the body 1, a movable brewing assembly 4, a water supply assembly 5 and a control device. The movable brewing assembly 4 is arranged in the machine body 1 and is connected with the driving assembly 3, the movable brewing assembly 4 comprises a shell 41, a first opening 42 is formed on one side, facing the fixed brewing head 2, of the shell 41, and the fixed brewing head 2 seals the first opening 42 to enable an inner cavity of the shell 41 and the fixed brewing head 2 to be enclosed together to form a brewing cavity 43. The movable brewing assembly 4 is driven by the driving assembly 3 to have at least a first position, a second position and a third position relative to the fixed brewing head 2 in the machine body 1, wherein the fixed brewing head 2 is positioned at the first opening 42 in the first position, the fixed brewing head 2 stretches into the inner cavity of the shell 41 from the first opening 42 at a first depth in the second position, and the fixed brewing head 2 stretches into the inner cavity of the shell 41 from the first opening 42 at a second depth in the third position, and the second depth is larger than the first depth. The water supply assembly 5 communicates with the brewing chamber 43 through the stationary brewing head 2 for providing the brewing chamber 43 with a pre-wetting liquid and a brewing liquid via the stationary brewing head 2.

Further, as shown in fig. 4, a control device is electrically connected to the driving assembly 3 and the water supply assembly 5, respectively, and the control device is configured to perform steps S101 to S103. Step S101: a powdered foodstuff is fed into the brewing chamber 43. Step S102: after controlling the drive assembly 3 to bring the movable brewing assembly 4 to the first position, the water supply assembly 5 is controlled to supply a first volume of pre-soaking wet liquid into the brewing chamber 43 so as to pre-soak the powdery food material in the brewing chamber 43 through the pre-soaking wet liquid. Step S103: after the preliminary soaking is finished, the driving assembly 3 is controlled to enable the movable brewing assembly 4 to move to the second position and move from the second position to the third position, and in the process that the movable brewing assembly 4 moves from the second position to the third position to execute the powder pressing action, the water supply assembly 5 is controlled to enable the second volume of pre-soaking wet liquid to be supplied into the brewing cavity 43, so that the non-compacted powdery food in the brewing cavity 43 is soaked for the second time.

Specifically, the coffee maker may further include a bean grinding assembly 8 for grinding coffee beans, and the bean grinding assembly 8 may communicate with the brewing chamber 43 to feed powdered food material into the brewing chamber 43.

As shown in fig. 1-3, the movable brewing assembly 4 shown in fig. 1 is in a first position, the movable brewing assembly 4 shown in fig. 2 is in a second position, and the movable brewing assembly 4 shown in fig. 3 is in a third position. The first position is understood to be the position in which the fixed brew head 2 is located at the first opening 42 blocking the brew chamber 43, such that the brew chamber 43 is able to provide a brewing environment for the powdered food material therein. The third position, in which the powdered food substance in the brewing chamber 43 has been pressed into a state in which it is no longer compressible, is understood to be the position in which the movable brewing assembly 4 completes the compacting action. The second position, in which the powdered food substance in the brewing chamber 43 is still in a fluffy state, is then understood to be an intermediate position in which the movable brewing assembly 4 does not complete the crushing action. Specifically, in conjunction with fig. 1 to 3, the first position, the second position, and the third position may be positions that the movable brewing assembly 4 sequentially reaches in a direction in which the movable brewing assembly moves toward the fixed brewing head 2, that is, the first position, the second position, and the third position shown in fig. 1 to 3 are sequentially arranged from left to right.

Further, in the first position, the powdered food substance ground by the grinding assembly 8 of the coffee machine can fall into the brewing chamber 43, i.e. the control device performs step S101, and specifically controls the grinding assembly 8 to feed the powdered food substance into the brewing chamber 43.

After the first volume of pre-soaking wet liquid is fed into the brewing cavity 43 at the first position, the control device controls the driving assembly 3 to enable the movable brewing assembly 4 to move forwards from the first position to the second position, and the water supply assembly 5 stops working, so that food materials can be fully contacted with the first volume of pre-soaking wet liquid, the volume of the brewing cavity 43 can be reduced by moving the movable brewing assembly 4 from the first position to the second position, the food materials in the brewing cavity 43 are pressurized by utilizing the movement of the movable brewing assembly 4, and the first volume of pre-soaking wet liquid can be fully contacted with powdery food materials, so that the purpose of fully extracting the food materials is achieved. The forward movement is understood to mean a movement of the movable brewing assembly 4 in a direction towards the fixed brewing head 2, and the backward movement of the movable brewing assembly 4 is understood to mean a movement of the movable brewing assembly 4 in a direction away from the fixed brewing head 2.

After the movable brewing assembly 4 reaches the second position, the control device controls the water supply assembly 5 to start supplying the pre-soaking liquid with the second volume into the brewing cavity 43, and meanwhile, the driving assembly 3 continuously drives the movable brewing assembly 4 to move forwards from the second position to the third position, so that the pre-soaking liquid sprayed into the brewing cavity 43 can be pressurized for the second time through the movable brewing assembly 4 which moves, the pre-soaking liquid and the powdery food materials can be fully mixed, and the extraction effect is improved.

Specifically, the water supply assembly 5 may include a water pump 51, a water tank 52, and a heating pot 53, where the water pump 51 is configured to pump water in the water tank 52 to the heating pot 53, and heat the water to form high temperature water through the heating pot 53 and discharge the high temperature water into the brewing chamber 43. It should be noted that, the pre-soaking wet liquid and the brewing liquid discharged from the water supply assembly 5 may be high temperature water or different liquids, which are not particularly limited in the present application, and the pre-soaking wet liquid and the brewing liquid may be understood as liquids that indicate different phases of the water discharged from the water supply assembly 5, and are not liquids representing that the pre-soaking liquid and the brewing liquid are different in two components.

Specifically, as shown in fig. 1, 6 and 7, the upper side of the housing 41 may be formed with a second opening configured as a powder receiving port 44 for interfacing with the powder discharging port of the bean grinding assembly 8 to receive the powder food material formed after being ground by the bean grinding assembly 8.

In some alternative embodiments, the coffee maker may further include a sensing assembly electrically connected to the control device, the sensing assembly may include a first sensor for receiving first position information of the movable brewing assembly 4 reaching the first position, a second sensor for receiving second position information of the movable brewing assembly 4 reaching the second position, and a third sensor for receiving third position information of the movable brewing assembly 4 reaching the third position, so that the control device can accurately acquire the information of the movable brewing assembly 4 reaching the first position, the second position, and the third position, thereby accurately controlling the start and stop of the water supply assembly 5. In some other embodiments, the coffee machine may also obtain the position information of the movable brewing assembly 4 through controlling parameters such as the rotation speed of the motor of the driving assembly 3, and is not limited to obtaining the position information through the sensing assembly.

Specifically, a water spraying surface may be formed on a side of the fixed brewing head 2 facing the movable brewing assembly 4, and the liquid discharged into the brewing chamber 43 by the water supply assembly 5 is directly sprayed into the brewing chamber 43 through the water spraying hole on the water spraying surface, so as to achieve the effect of impacting the powdery food material in the brewing chamber 43, so that the liquid is fully contacted with the powdery food material. More specifically, the water jet holes may be oriented in a direction opposite to the forward direction of the movable brewing assembly 4 for better impact.

According to the invention, the movable brewing assembly 4 is driven by the driving assembly 3 to have the first position, the second position and the third position, the control device can control the driving assembly 3 to enable the movable brewing assembly 4 to be located at the first position, then control the water supply assembly 5 to supply a first volume of pre-soaking liquid into the brewing cavity 43 so as to preliminarily soak powdery food in the brewing cavity 43 through the pre-soaking liquid, namely, the first stage pre-soaking is realized, and the control device can also control the water supply assembly 5 to supply a second volume of pre-soaking liquid into the brewing cavity 43 in the process that the movable brewing assembly 4 moves from the second position to the third position to execute the powder pressing action, so as to secondarily soak the powdery food which is not compacted in the brewing cavity 43, namely, the second stage pre-soaking is realized, and the coffee extraction can achieve a better and stable effect through the two stages of pre-soaking, thereby improving the taste of coffee. And the second-stage pre-wetting is realized in the process of the powder pressing action, and the second-stage pre-wetting injection second volume of pre-wetting liquid is pressurized through the powder pressing action, so that the pre-wetting liquid in the second-stage pre-wetting injection can be uniformly and fully mixed with the powdery food, and the pre-wetting liquid can be quickly absorbed by the powdery food, thereby further improving the taste of the coffee liquid.

In some embodiments, as shown in fig. 4, the control device is further configured to perform step S104 after step S103. Step S104: when the secondary wetting is completed and the movable brewing assembly 4 is in the third position, the water supply assembly 5 is controlled to supply the brewing liquid into the brewing chamber 43 so as to brew the food material after the secondary wetting. Therefore, after the powdery food material is pre-soaked, the food material is brewed by the brewing liquid to obtain the coffee liquid with better taste.

In some alternative embodiments, the water supply assembly 5 may continuously supply the pre-soaking liquid corresponding to the second stage pre-soaking liquid and the brewing liquid into the brewing chamber 43, so that the second stage pre-soaking liquid directly enters the brewing stage, and the water supply assembly 5 does not stop working in the middle, so as to achieve better brewing efficiency. In some other embodiments, the water supply assembly 5 may stop working for a period of time after the pre-soaking liquid is supplied, and then start to supply the soaking liquid into the soaking cavity 43, so as to provide a certain time for the pre-soaking liquid to fully contact with the food material.

Specifically, the control device is further configured to send a stop signal to the water supply assembly 5 after the movable brewing assembly 4 is controlled to move to the third position and the second volume of pre-soaking wet liquid is supplied, and control the water supply assembly 5 to supply the brewing liquid to the brewing chamber 43 after a preset time, so as to achieve the purpose of fully contacting the pre-soaking wet liquid with the food material.

The preset time may be 2 seconds to 5 seconds, preferably 3 seconds, and after the first volume and the second volume of the pre-soaking liquid are fed into the brewing chamber 43, the water supply assembly 5 stops working within the preset time, so that the food material and the pre-soaking liquid are fully mixed, absorbed and expanded in the brewing chamber 43, and a better extraction effect is obtained, thereby further improving the taste of the coffee liquid.

Preferably, the ratio of the first volume to the sum of the first volume and the second volume is 1:3. for example, a first volume of 5 milliliters of pre-soak solution is fed into the brew chamber 43 during the first stage of pre-soak, and a second volume of 10 milliliters of pre-soak solution is fed into the brew chamber 43 during the second stage of pre-soak.

In some embodiments, the ratio of the sum of the first volume and the second volume to the weight of the powdered food material within the brewing chamber 43 is 1:1.5 to 1:0.8. The ratio of the sum of the first volume and the second volume to the weight of the powdered food material in the brewing chamber 43 can achieve a better extraction effect of the powdered food material by a certain amount of pre-impregnated wet liquid.

For example, typically a cup of coffee will require 12g of powdered food material, the sum of the first and second volumes may be controlled between 8 ml and 15 ml, and the pre-wet solution is preferably water, the density of which is then water.

In particular, the distance from the second position to the third position may range from 3 mm to 15 mm, preferably the distance from the second position to the third position is 5 mm.

In some embodiments, as shown in fig. 4, the control device is further configured to perform step S105 after step S104. Step S105: obtaining the feeding amount of the brewing liquid fed into the brewing chamber 43 by the water supply assembly 5; the water supply assembly 5 is controlled to stop supplying the brewing liquid when the feeding amount reaches a preset value. In this way, after a fixed amount of brewing liquid is provided into the brewing chamber 43, the water supply assembly 5 can be timely controlled to stop, so that a better brewing effect is achieved, and a coffee liquid with better taste is obtained.

In some embodiments, as shown in fig. 5, the movable brewing assembly 4 has a fourth position relative to the fixed brewing head 2 within the body 1 under the drive of the driving assembly 3, and the movable brewing assembly 4 is shown in fig. 5 in the fourth position in which the fixed brewing head 2 is disengaged from the first opening 42. As shown in fig. 4, the control device is further configured to execute step S106 after step S105. Step S106: in the event that brewing is completed, the drive assembly 3 is controlled to move the movable brewing assembly 4 from the third position to the fourth position, the movable brewing assembly 4 being remote from the fixed brewing head 2, and the residues within the brewing chamber 43 being expelled. The structure can realize automatic slag discharge through the movement of the movable brewing assembly 4, and is convenient for users to use.

Specifically, the fourth position is located on the side of the first position away from the second position, and when the movable brewing assembly 4 moves from the third position back to the fourth position, the movable brewing assembly 4 gradually moves away from the fixed brewing head 2, so that the residues in the brewing chamber 43 can be discharged.

In some embodiments, the coffee machine may further include a screw assembly, the driving assembly 3 may be in transmission connection with the movable brewing assembly 4 through the screw assembly, the screw assembly includes a nut and a screw meshed with each other, the nut is in transmission connection with the driving assembly 3, the screw is connected with the movable brewing assembly 4, when the driving assembly 3 drives the nut to rotate, the screw can be driven to do linear movement in the machine body 1, and further the movable brewing assembly 4 is driven to do linear movement in the machine body 1, so that the screw assembly can stably drive the movable brewing assembly 4 to achieve linear reciprocating movement.

In some embodiments, as shown in fig. 1, 6 and 7, the coffee machine further comprises a push rod assembly 6 movably arranged in the brewing chamber 43, the push rod assembly 6 can be mutually locked or unlocked with the machine body 1, and the movable brewing assembly 4 is in a first position, the push rod assembly 6 is locked with the machine body 1 and is positioned at one side, far away from the fixed brewing head 2, in the brewing chamber 43; when the movable brewing assembly 4 moves between the first position and the second position and between the second position and the third position, the push rod assembly 6 is unlocked to the machine body 1 and moves along with the movable brewing assembly 4, and the push rod assembly 6 is positioned at one side, away from the fixed brewing head 2, of the brewing cavity 43; in the fourth position, the push rod assembly 6 is locked to the body 1 and is located at the first opening 42 of the housing 41. The structure is simple, and the connection is stable.

When the movable brewing assembly 4 moves forwards to the first position, the push rod assembly 6 is locked to the machine body 1, and the push rod assembly 6 does not move along with the movable brewing assembly 4 in the process, so that the push rod assembly 6 and the movable brewing assembly 4 are relatively displaced. When the movable brewing assembly 4 moves from the first position to the second position, the push rod assembly 6 is unlocked to the machine body 1 and synchronously moves forward under the drive of the movable brewing assembly 4, and at the moment, the push rod assembly 6 and the movable brewing assembly 4 do not relatively displace.

Then, the driving component 3 continues to drive the movable brewing component 4 to move towards the direction where the fixed brewing head 2 is located until the movable brewing component 4 drives the push rod component 6 to move to the third position along with the movable brewing component 4, and at this time, the push rod component 6 is still unlocked on the machine body 1 and synchronously moves forward under the drive of the movable brewing component 4. After brewing is completed under the third position, one side coffee brewing process is completed.

Thereafter, the control device may control the motor of the drive assembly 3 to reverse such that the movable brewing assembly 4 moves backward, i.e. the movable brewing assembly 4 passes the second position and the first position in sequence from the third position until retreating to the fourth position, such that the brewed residues can be discharged. Specifically, during the process that the movable brewing assembly 4 moves backwards from the third position to the first position, the push rod assembly 6 is linked with the movable brewing assembly 4 under the action of friction force until the movable brewing assembly 4 is retracted to the first position, the push rod assembly 6 is locked with the machine body 1 again, then, during the process that the movable brewing assembly 4 moves from the first position to the fourth position, the push rod assembly 6 does not move along with the movable brewing assembly 4, the push rod assembly 6 and the movable brewing assembly 4 are relatively displaced again, and the push rod assembly 6 moves towards the direction where the first opening 42 is located, so that coffee grounds are pushed out.

In some embodiments, as shown in fig. 7, a filter screen may be disposed on a side of the push rod assembly 6 facing the fixed brew head 2, and a liquid outlet channel may be disposed on the push rod assembly 6, and an inlet of the liquid outlet channel may be located on an end surface of the push rod assembly 6 facing the fixed brew head 2, and the filter screen may be fixed on the end surface to block the inlet of the liquid outlet channel. The outlet of the liquid outlet channel may be provided on the peripheral surface of the push rod assembly 6. The movable brewing assembly 4 can be provided with a liquid outlet 9, and when the movable brewing assembly 4 moves to the third position, the outlet of the liquid outlet channel is opposite to the liquid outlet 9, so that coffee liquid enters the liquid outlet channel through the filter screen sheet and flows out through the liquid outlet channel and the liquid outlet 9 on the movable brewing assembly 4.

In some embodiments, as shown in fig. 1, 6 and 7, the coffee machine further comprises a sliding pull rod assembly 7, the sliding pull rod assembly 7 comprises a fixed frame 71 and a pull rod 72, the fixed frame 71 is fixedly connected with the machine body 1, the pull rod 72 is connected with one end of the push rod assembly 6 far away from the fixed brewing head 2 and is slidably connected on the fixed frame 71, one of the fixed frame 71 and the pull rod 72 is provided with a locking pin 73, the other one of the fixed frame 71 and the pull rod 72 is provided with a locking groove 74, and when the pull rod 72 slides relative to the fixed frame 71 so that the locking pin 73 stretches into the locking groove 74, the locking pin 73 is locked; when the push rod assembly 6 pulls the pull rod 72, the locking pin 73 is disengaged from the locking groove 74, and the locking pin and the locking groove are unlocked. The structure enables the push rod assembly 6 to be unlocked and locked stably by the machine body 1, and the structure stability is good.

Specifically, the locking pins 73 may be two groups, each group of locking pins 73 may include two locking pins 73, and two locking pins 73 in one group may be oppositely disposed on the pull rod 72 along the first line, and corresponding locking grooves 74 are disposed on the fixing frame 71; two locking pins 73 of the other group may be provided on the fixing frame 71 along a second straight line, and corresponding locking pins 73 may be provided on the pull rod 72, and the first straight line and the second straight line may be perpendicular to each other.

When the movable brewing assembly 4 drives the push rod assembly 6 to retract to the first position, each locking pin 73 is exactly aligned with the locking groove 74 and can extend into the locking groove 74 to realize locking, as shown in fig. 1; when the movable brewing assembly 4 pulls the push rod assembly 6 to move with a large pulling force, the elastic force of the locking pin 73 can be overcome, the locking pin 73 is retracted and is out of the locking groove 74, and the pull rod 72 and the fixing frame 71 are unlocked, as shown in fig. 2. The locking and unlocking of the pull rod 72 and the fixing frame 71 can be realized skillfully through the locking pin 73 and the locking groove 74, and the locking device is simple in structure and good in stability.

Specifically, the locking pin 73 may include a pin body and a spring, a pin hole may be formed in the pull rod 72 and the guide rod, one end of the pin body may be inserted into the pin hole, the other end of the pin body may be configured to be protruded from the pin hole, and the spring may be disposed between the pin body and a bottom of the pin hole to apply an elastic force to the pin body to protrude from the lock hole.

The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.

Claims

1. Coffee machine, comprising a body (1) and a fixed brewing head (2) and a driving assembly (3) arranged in the body (1), characterized in that it further comprises:

The movable brewing assembly (4) is arranged in the machine body (1) and is connected with the driving assembly (3), the movable brewing assembly (4) comprises a shell (41), a first opening (42) is formed on one side of the shell (41) facing the fixed brewing head (2), the fixed brewing head (2) seals the first opening (42) to enable an inner cavity of the shell (41) and the fixed brewing head (2) to be surrounded together to form a brewing cavity (43), the movable brewing assembly (4) is driven by the driving assembly (3) to have at least a first position, a second position and a third position in the machine body (1) relative to the fixed brewing head (2), the fixed brewing head (2) is positioned at the first opening (42) in the first position, the fixed brewing head (2) is stretched into the shell (41) at a first depth by the first opening (42), and the inner cavity is stretched into the shell (2) at a second depth by the second opening (42) in the second position;

A water supply assembly (5) in communication with the brewing chamber (43) through the fixed brewing head (2) for providing the brewing chamber (43) with a pre-wetting liquid and a brewing liquid via the fixed brewing head (2);

A control device electrically connected to the drive assembly (3) and the water supply assembly (5), respectively, the control device being configured to control the water supply assembly (5) to supply a first volume of pre-soaking liquid into the brewing chamber (43) after controlling the drive assembly (3) to bring the movable brewing assembly (4) into a first position, so as to preliminarily soak the powdery food material in the brewing chamber (43) via the pre-soaking liquid;

After the preliminary soaking is finished, the driving assembly (3) is controlled to enable the movable brewing assembly (4) to move to a second position and move from the second position to a third position, and in the process that the movable brewing assembly (4) moves from the second position to the third position to execute the powder pressing action, the water supply assembly (5) is controlled to enable the water supply assembly to supply a second volume of pre-soaking wet liquid into the brewing cavity (43) so as to secondarily soak the powder food materials which are not compacted in the brewing cavity (43); wherein the ratio of the first volume to the sum of the first and second volumes is 1: 3-1:2; the ratio of the distance from the first position to the second position to the distance from the first position to the third position is in the range of 0.7-0.95;

the control device is further configured to: when the secondary soaking is finished and the movable brewing assembly (4) is in the third position, the water supply assembly (5) is controlled to supply brewing liquid into the brewing cavity (43) so as to brew the food materials after the secondary soaking.

2. Coffee machine according to claim 1, characterized in that the ratio of the sum of the first and second volumes to the weight of the powdered food material inside the brewing chamber (43) is between 1:1.5 and 1:0.8.

3. A coffee machine according to claim 1, wherein the control means are further configured to send a stop signal to the water supply assembly (5) after controlling the movable brewing assembly (4) to move to the third position and a second volume of pre-impregnated wet liquid has been fed, and to control the water supply assembly (5) to provide brewing liquid to the brewing chamber (43) after a preset time.

4. A coffee machine according to claim 1, wherein said control means are further configured to obtain the feeding of the infusion liquid of said water supply assembly (5) into said infusion chamber (43); and when the feeding amount reaches a preset value, controlling the water supply assembly (5) to stop feeding the brewing liquid.

5. A coffee machine according to claim 1, wherein said movable infusion assembly (4) has, under the drive of said drive assembly (3), a fourth position inside the machine body (1) with respect to said fixed infusion head (2), in which said fixed infusion head (2) is disengaged from said first opening (42);

The control device is further configured to: and under the condition that brewing is finished, controlling the driving assembly (3) to enable the movable brewing assembly (4) to move from the third position to the fourth position, enabling the movable brewing assembly (4) to be away from the fixed brewing head (2), and discharging residues in the brewing cavity (43).

6. The coffee machine according to claim 5, characterized in that it further comprises a push rod assembly (6) movably arranged inside said infusion chamber (43), said push rod assembly (6) being able to be mutually locked or unlocked with said body (1), said movable infusion assembly (4) being in said first position, said push rod assembly (6) being locked to said body (1) and being located inside said infusion chamber (43) on the side remote from said fixed infusion head (2); when the movable brewing assembly (4) moves between the first position and the second position and between the second position and the third position, the push rod assembly (6) is unlocked to the machine body (1) and moves along with the movable brewing assembly (4), and the push rod assembly (6) is positioned at one side, away from the fixed brewing head (2), in the brewing cavity (43); in the fourth position, the push rod assembly (6) is locked to the body (1) and is located at the first opening (42) of the housing (41).

7. The coffee machine according to claim 6, characterized in that it further comprises a sliding pull rod assembly (7), said sliding pull rod assembly (7) comprising a fixed frame (71) and a pull rod (72), said fixed frame (71) being fixedly connected to said machine body (1), said pull rod (72) being connected to said push rod assembly (6) at an end remote from said fixed brew head (2) and being slidingly connected to said fixed frame (71), one of said fixed frame (71) and said pull rod (72) being provided with a locking pin (73), the other of them being provided with a locking slot (74), locking being achieved when said pull rod (72) slides with respect to said fixed frame (71) such that said locking pin (73) extends into said locking slot (74); when the push rod assembly (6) pulls the pull rod (72), the locking pin (73) is separated from the locking groove (74), and the locking pin and the locking groove are unlocked.