Patent Publication Number: US-2021161326-A1

Title: Brewing device and beverage machine

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This disclosure is a continuation of International Patent Application No. PCT/CN2019/123767, filed on Dec. 6, 2019, which is based upon and claims priority of Chinese Patent Application No. 201911214532.4, filed on Dec. 2, 2019, titled “BREWING DEVICE AND BEVERAGE MACHINE”, the entire contents of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The embodiments of the present application relate to the technical field of beverage brewing, in particular to a brewing device and a beverage machine. 
     BACKGROUND 
     Coffee is one of the three major beverages in the world, and communities of coffee drinkers have been growing all around the world. The ever-increasing popularity of coffee machines renders a more convenient and simpler preparation of coffee, which is followed by every moment of life full of the flavor of coffee. 
     Capsule coffee machines are one type of coffee machines, a manufacturer packs coffee powder into a plastic capsule box similar to a pudding box, and then charges an inert gas to preserve freshness. A cup of fragrant coffee is prepared soon after a capsule is inserted into a machine. In comparison with a semi-automatic coffee machine or a full-automatic coffee machine using coffee powder, the operation of the capsule coffee machine is quite simple and convenient. The capsule coffee machine in the broad sense can not only make coffee, but also make natural flower and fruit tea, etc. 
     Various capsule coffee machines are currently available from the market, generally provided with a base, a capsule holder for holding a capsule, an injection module for piercing a capsule membrane and injecting hot water, and a power module for driving the injection module to move along a preset direction. Some capsule coffee machines adopt drawer-type capsule holders which can move relative to the base of the coffee machine, when a capsule is to be added, the capsule holder is pulled out from the base of the coffee machine, then the capsule is placed into specific accommodating cavities, and then the capsule holder is pushed back to the original position. 
     However, the inventor(s) of the present application found during implementing the present application that: for the capsule coffee machine with such a structure, after the coffee is prepared, the used capsule box cannot be automatically recovered, the user has to take out the capsule box where the brewed liquid is adhered, and this may leads to a poor user experience. 
     SUMMARY 
     Embodiments of the present application provide a brewing device, including: 
     a base; 
     a capsule holder, the capsule holder being provided on the base; 
     an injection module, the injection module being movably connected with the base and able to get close to or away from the capsule holder along a preset direction; 
     a sliding rail, the sliding rail having one end thereof carried on the capsule holder and the other end thereof rotatably mounted on the capsule holder; and 
     a driving module, the driving module being configured to drive the sliding rail to rotate when the injection module is getting away from the capsule holder along the preset direction, so that one end of the sliding rail carried on the capsule holder gets away from the capsule holder. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the present embodiments are briefly described below, and it is obvious that the drawings in the description below illustrate only some of the present embodiments of the present application, and that other drawings can be obtained from the structures shown in the drawings without involving any inventive effort for a person skilled in the art. 
         FIG. 1  is a perspective view of a brewing device according to an embodiment of the present application from an angle; 
         FIG. 2  is a perspective view of the brewing device of  FIG. 1  in its brewing working position with side plates not shown; 
         FIG. 3  is a perspective view of the brewing device of  FIG. 1  in its sliding-down working position with a base not shown; 
         FIG. 4  is a perspective view of the base of  FIG. 1 ; 
         FIG. 5  is a perspective view of a capsule holder of  FIG. 2 ; 
         FIG. 6  is a perspective view of an injection module of  FIG. 2 ; 
         FIG. 7  is a perspective view of a sliding rail of  FIG. 2 ; 
         FIG. 8  is a schematic view showing the connection of the sliding rail and the capsule holder of  FIG. 2 ; 
         FIG. 9  is a schematic view showing a straight sliding rail and the sliding rail having a bent part being respectively rotated until their ends proximate to a cup holder reach the same height; 
         FIG. 10  is a partially enlarged view at A in  FIG. 3 ; 
         FIG. 11  is a perspective view of a brewing device according to another embodiment of the present application; 
         FIG. 12  is a perspective view of the injection module of  FIG. 11 ; 
         FIG. 13  is a perspective view of the sliding rail of  FIG. 11 ; 
         FIG. 14  is a perspective view of a brewing device according to yet another embodiment of the present application from an angle; 
         FIG. 15  is a perspective view of the brewing device of  FIG. 14  from another angle; 
         FIG. 16  is a perspective view of the sliding rail of  FIG. 15 ; 
         FIG. 17  is a partially enlarged view at B in  FIG. 15 ; 
         FIG. 18  is a perspective view of a brewing device according to still another embodiment of the present application with the side plates not shown; 
         FIG. 19  is a partially enlarged schematic view at C in  FIG. 18 . 
     
    
    
     DETAILED DESCRIPTION 
     In order that the present application may be readily understood, a more particular description of the present application will be rendered by reference to the accompanied drawings and embodiments. It should be noted that when an element is “secured to/fixedly connected with” another element, it can be a direct relationship or there can be one or more intervening elements therebetween. When an element “connects” another element, it can be directly connected with the element or there can be one or more intervening elements therebetween. As used herein, the terms “vertical”, “horizontal”, “left”, “right”, “inner”, “outer” and the like are used for illustrative purposes only. 
     Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this present application belongs. The terms in the description of the present application are intended for describing particular embodiments only rather than limiting the present application. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     Furthermore, the technical features referred to in different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other. 
     In this description, “mounting” includes welding, screwing, snapping, gluing or the like to secure or limit a component or device to a particular position or location, the component or device may remain stationary or movable within limits at the particular position or location, and the component or device may be removable or not after being secured or limited to the particular position or location, which is not limited in the embodiments of the present application. 
     With reference to  FIGS. 1 to 3 , a perspective view of a brewing device according to an embodiment of the present application from an angle, a perspective view of the brewing device in its brewing working position with side plates not shown, and a perspective view of the brewing device in its sliding-down working position with a base not shown are presented, the brewing device including a base  100 , a capsule holder  200 , an injection module  300 , a power module  400 , a sliding rail  500  and a driving module. Wherein, the base  100  is provided with a passage; the capsule holder  200 , at least partially received in the passage, is slidably mounted on the base  100 , capable of directionally sliding along the passage. The injection module  300  is movably connected with the base  100  and can get close to or away from the capsule holder  200  in a preset direction. The power module  400  is connected with the injection module  300  for driving the injection module  300  to get close to or away from the capsule holder  200  in the preset direction. One end of the sliding rail  500  is carried at one end of the capsule holder  200  proximate to the injection module  300  and used for carrying a flange of a capsule  700 ; the other end of the sliding rail  500  is rotatably mounted on the capsule holder  200 . The driving module is configured to drive the sliding rail  500  to rotate when the injection module  300  is getting away from the capsule holder  200  in the preset direction, so that the end of the sliding rail  500  carried on the capsule holder  200  gets away from the capsule holder  200 . 
     With regard to the base  100 , reference is made to  FIG. 4  which shows a perspective view of the base  100  in combination with  FIGS. 1 to 3 , the base  100  includes two oppositely disposed side plates  110 , and a connecting plate  120  having both ends connected with the two side plates  110 , respectively. Each side plate  110  is vertically disposed, and the connecting plate  120  is used for connecting the two side plates  110  so that the two side plates  110  are oppositely arranged and fixed relative to each other, thereby forming the above-mentioned passage  130 . 
     With regard to the capsule holder  200 , reference is made to  FIG. 5  which shows a perspective view of the capsule holder  200  in combination with  FIGS. 1 to 4 , the capsule holder  200  includes a cup holder  210 , a slider  220 , and a push plate  230 . An accommodating cavity  211  for accommodating the capsule  700  is provided at the end, proximate to the injection module  300 , of the cup holder  210  (i.e., the top as shown). The slider  220  is generally strip-shaped, the two sliders  220  are arranged on two opposite sides of the cup holder  210  in parallel, and the sliders  220  extend in a direction extending parallel to the passage  130 . The two side plates  110  are respectively provided at one end facing the passage  130  with guide grooves  111  adapted to the sliders  220  and extending in a direction extending parallel to the passage  130 , and the pair of sliders  220  are mated with the pair of guide grooves  111  to ensure that the capsule holder  200  can slide directionally in the passage  130 . The push plate  230  is fixedly connected with one end of the slider  220  and facilitates pulling the capsule holder  200  out of the accommodating cavity  211  to the exterior of the passage  130  for the capsule  700  to fill in, as well as pushing the capsule holder  200  into a set position to conduct the subsequent brewing process. 
     With regard to the injection module  300  described above, reference is made to  FIG. 6  which shows a perspective view of the injection module  300  in combination with  FIGS. 1 to 5 , the injection module  300  includes an injection component  310  and a connecting arm  320 . The injection component  310  is disposed in the passage  130  and positioned on one side of the capsule holder  200  where the accommodating cavity  211  is provided, specifically, above the accommodating cavity  211 . The injection component  310  serves to pierce a sealing membrane of the capsule  700  and inject boiled water into the capsule  700  to complete the brewing process. One end of the connecting arm  320  is fixedly connected with the injection component  310 , and the other end of the connecting arm  320  extends away from the push plate  230  in a direction parallel to the passage  130  and is rotatably mounted on the base  100 ; that is, the direction in which the injection module  300  rotates in the present embodiment is the preset direction described above. In the present embodiment, the number of the connecting arms  320  is two, and the two connecting arms  320  are respectively arranged on two sides of the injection component  310  along the direction of width of the passage  130 ; one end of each connecting arm  320  distal to the injection component  310  is connected with a rotating shaft  321 , the side plate  110  is provided with a rotating hole  112  ( FIG. 4 ) matched with the rotating shaft  321 , and the connecting arm  320  and the side plate  110  are rotatably connected through the matching of the rotating shaft  321  and the rotating hole. At the brewing working position, the injection module  300  is positioned close to an opening of the accommodating cavity  211 , and generally, almost parallel to the capsule holder  200 ; starting from such a position, the injection module  300  reaches the sliding-down working position (shown in  FIG. 3 ) after being rotated by a preset angular displacement in a direction away from the accommodating cavity  211 . It will be appreciated that in other embodiments of the present application, the connecting arm  320  may be rotatably connected with the side plate  110  in other ways. For example, in some embodiments of the present application, the rotating shaft  321  is sleeved with a bearing, an inner race of which is in interference fit with the rotating shaft, and an outer race of which is fixed to the side plate  110 , that is, the connecting arm  320  is rotatably connected with the side plate through a bearing. 
     With regard to the power module  400 , reference is made to  FIG. 2  in combination with  FIGS. 1 and 3 to 6 , the power module  400  is connected with the injection module  300  and configured to drive the injection module  300  to reciprocate between the brewing working position and the sliding-down working position, and the power module  400  includes a first link  410 , a second link  420 , and a rotation mechanism  430 . One end of the first link  410  is rotatably mounted on the injection component  310  of the injection module, the other end of the first link  410  is rotatably connected with the second link  420 , an output end of the rotation mechanism  430  is connected with the second link  420  and configured to drive the second link  420  to rotate; the base  100 , the second link  420 , the first link  410  and the injection module  300  together form a four bar linkage, so that regular movement of the injection module  300  can be rendered by driving the second link  420  by the rotation mechanism  430 . In the present embodiment, the rotation mechanism  430  is an electric motor, and it will be appreciated that in other embodiments of the present application, the rotation mechanism may be any mechanism that can achieve rotational output, such as a rotating cylinder. 
     Further, the rotation mechanism  430  further includes a worm gear and a worm, through which the rotation mechanism is connected with the second link to reduce the rotation speed of the injection module  300  to a certain extent and avoid damage caused by strong impact between the injection module  300  and the capsule holder  200  due to too fast rotation of the motor. The worm gear is coaxially and fixedly connected with a worm gear shaft, the worm gear shaft is rotatably mounted on the base  100 , and the second link is sleeved on and fixed with the worm gear shaft. And the worm is matched with the worm gear and connected with the output end of the rotation mechanism. 
     With regard to the sliding rail  500 , reference is made to  FIGS. 7 and 8  which respectively show a perspective view of the sliding rail  500  and a schematic view showing the connection of the sliding rail  500  and the capsule holder  200  in combination with  FIGS. 1 to 6 , the sliding rail  500  includes a sliding guide part  510 , one end of which is carried at one end of the cup holder  210  proximate to the injection component  300 , the other end of which extends away from the push plate  230  in a direction extending parallel to the passage  130  and is rotatably mounted on the capsule holder  200 . The end of the sliding rail  500  carried on the cup holder  210  is disposed at an edge of a profile of the accommodating cavity  211  and used for carrying the flange of the capsule  700 . 
     Further, the sliding rail  500  further includes a bent part  520  having one end connected with one end of the sliding guide part  510  distal to the accommodating cavity  211  and the other end extending towards a bottom of the base  110 . In the present embodiment, one end of the bent part  520  distal to the cup holder  210  extends towards the bottom of the base  100  and gradually gets away from the cup holder  210 . Actually, the bent part  520  can be formed by bending a straight sliding rail, and on one hand, the distance between the two ends of the straight sliding rail can be reduced by the configuration of the bent part  520 , so that the travel of the capsule  700  is shortened; on the other hand, when the sliding rail  500  is rotated by a certain angle, the capsule  700  slides down, the bent part  520  has a certain inclination angle relative to the sliding guide part  510 , and the capsule  700  slides on the bent part  520  with less resistance, so that the bent part  520  can accelerate the falling of the capsule  700  when the capsule  700  slides down to the bent part  520 . 
     In addition, the sliding rail  500  having the bent part  520  enables a greater inclined angle of the sliding guide part  510  when the end of the sliding rail  500  carried at one end of the cup holder  210  rises by the same height as that of the straight sliding rail having the same total length does. To facilitate understanding, reference is made specifically to  FIG. 9  which is a schematic view showing a straight sliding rail and the sliding rail  500  having the bent part  520  being respectively rotated until their ends proximate to the cup holder  210  reach the same height in combination with other drawings. As shown in the drawings, point O and point X respectively represent two ends of the straight sliding rail when the straight sliding rail is horizontal, point Y represents a position of the straight sliding rail after the end thereof proximate to the cup holder being rotated by angle α along a circle centered in point O, and circle P is a movement track of the end of the straight sliding rail proximate to the cup holder, that is, the end of the straight sliding rail proximate to the cup holder  210  is rotated from a horizontal position at point X by angle α to point Y along a circle centered in point O. Similarly, points O′ and M represent both ends (O′M=OM) of the bent part  520  of the sliding rail  500  having the bent part, points M and X represent both ends of the sliding guide part  510  of the sliding rail  500  having the bent part, point Z represents the position of the sliding rail  500  having the bent part after its end proximate to the cup holder being rotated by angle β along a circle centered in point O′, and points Z and Y are at the same height relative to the horizontal position, and circle Q is a movement track of the end, proximate to the cup base, of the sliding rail  500  having the bent part, namely: the end of the sliding rail with the bent part  520  proximate to the cup holder rotates from a horizontal position point X to point Z by angle β along a circle centered in point O′. The rotation angle of the sliding rail is generally less than 90 degrees, and within such a range, the track of the circle Q is always on the left side of the track of the circle P, then: 
     Lxz&gt;Lyz, wherein L represents chord length; 
     and RO′Z&lt;ROY, wherein R represents radius; 
     In addition, a chord length formula can be combined: L=2R*sin (θ/2), wherein L represents chord length and θ represents radian; 
     It can be inferred that β is greater than α, that is, the angle by which the sliding rail  500  having the bent part rotates is greater than the angle by which the straight sliding rail rotates. A horizontal piece has an included angle γ with the horizontal direction after being rotated by angle γ along a circle centered in any point, regardless of the choice of the rotation center, so the angle between the sliding guide part and the horizontal direction is β, which is larger than the included angle α of the straight sliding rail with the horizontal direction. Therefore, the sliding rail  500  having the bent part  520  provided by the present embodiment is more favorable for the capsule  700  to slide down. 
     Furthermore, in order to render a more reliable process to bring the capsule  700  out of the accommodating cavity  211  by the sliding rail  500 , the sliding guide part  510  of the sliding rail  500  is U-shaped. Reference is made to  FIGS. 7 and 8  in combination with other drawings, the U-shaped structure of the sliding guide part  510  is disposed around the edge of the accommodating cavity  211 , and both ends of the U-shaped structure extend in a direction parallel to the passage  130 . The two bent parts  520  are respectively connected with two ends of the sliding guide part  510  distal to the accommodating cavity  211 . Each bent part  520  is connected with a pin shaft  521  arranged in parallel with the rotating shaft  321 , the two pin shafts  521  extend in opposite directions, in the present embodiment, one end of each pin shaft  521  is connected with the bent part  520 , the other end of each pin shaft  521  extends away from the center of the passage  130 , and the sliding rail  500  is rotatably mounted on the slider  220  of the capsule holder  200  through the pin shaft  521 . The sliding guide part  510  is of a U-shaped structure, so that the area of the sliding rail  500  for bearing the capsule  700  is increased, and the process of bearing the capsule  700  by the sliding rail  500  is more reliable; moreover, the sliding rail  500  is also U-shaped, and the structure cooperates with the pin shaft  521  so that the sliding rail  500  is not easily disengaged after being mounted on the capsule holder  200 . 
     With regard to the driving module, reference is made to  FIG. 10  in combination with  FIGS. 6, 7  and others, the driving module  600  is used to drive the sliding rail  500  to rotate when the injection module  300  is getting away from the capsule holder  200  in the preset direction, so that one end of the sliding rail  500  carried on the capsule holder  200  gets away from the capsule holder  200  and brings the capsule  700  out of the accommodating cavity  211 . The driving module  600  includes a clamping hook  610  and a clamping strip  620 , wherein the clamping hook  610  is arranged on the sliding rail  500  and includes a connecting part  611  and a hooking part  612 , one end of the connecting part  611  is connected with the sliding guide part  510  of the sliding rail  500 , the other end of the connecting part  611  extends to the connecting arm  320  of the injection module  300 , and the hooking part  612  is arranged at one end, distal to the sliding rail  500 , of the connecting part  611  on a side of the connecting part  611  proximate to the center of the passage  130 . The clamping strip  620  is provided at the connecting arm  320  of the injection module  300 , extends integrally in a direction parallel to the passage  130 , and is located between the sliding rail  500  and the hooking part  612 . At the brewing working position, the clamping strip  620  is positioned on a side of the hooking part  612  proximate to the capsule holder. When the injection module  300  is moving to the sliding-down working position under the drive of the power module  400 , the clamping strip  620  can abut against the hooking part  612  of the clamping hook  610  and drive the sliding rail  500  to rotate along with the clamping hook  610 , so that one end of the sliding rail  500  gets away from the capsule holder  200  and brings the capsule  700  out of the accommodating cavity  211 ; when the sliding rail  500  is rotated by a certain angle, the capsule  700  will slide down in the direction in which the sliding rail  500  extends under the action of gravity and fall into a designated container. And after the capsule  700  slides off, the sliding rail  500  continues to rotate along with the injection module  300  until the hooking part  612  of the clamping hook  610  moves to the end of the clamping strip  620  with respect to the clamping strip  620  and is disengaged with the clamping strip  620  (shown in  FIG. 10 ), at which time, the sliding rail  500  rotates towards the capsule holder  200  under the action of gravity until the end proximate to the capsule holder  200  is carried on the capsule holder  200 . During the movement of the injection module  300  from the sliding-down working position to the brewing working position under the drive of the power module  400 , the clamping strip  620  first abuts against the hooking part  612  of the clamping hook  610 , renders the clamping hook  610  to be opened in a direction away from the center of the passage  130  by the elasticity of the clamping hook  610 , and then enables the return to the brewing working position by passing over the hooking part  612 . 
     Further, the distance between the two hooking parts  612  becomes smaller in a direction from the hooking part  612  to the sliding guide part  510  to provide guide for the clamping strip  620  to pass over the hooking part  612 , thereby preventing the clamping strip  620  from being directly pressed onto the hooking part  612  to damage the clamping hook  610 . 
     It should be understood that even though the clamping hook  610  in the above embodiment is provided on the sliding rail  500  and the clamping strip  620  is provided on the injection module  300 , the present application is not limited thereto; for example, in other embodiments of the present application, the clamping hook may also be provided on the injection module and extend in a direction towards the sliding rail, and accordingly, the clamping strip may be provided on the sliding rail between the injection module and the hooking part of the clamping hook. 
     Furthermore, in order to facilitate control of the power module  400  that can be stopped in time when the injection module  300  moves to the brewing working position, so that the injection module  300  can conduct the subsequent brewing process, the brewing device further includes a first sensor  330  and a controller (not shown), the first sensor  330  and the rotation mechanism  430  being both connected with the controller. Specifically, reference is made back to  FIG. 2  in combination with the other drawings, the first sensor  330  is fixed to the side plate  110  and corresponds to the position of the second link  420 . When the injection module  300  moves to the brewing working position, the second link  420  moves to abut against the first sensor  330  and triggers the first sensor  330 ; the controller controls the rotation mechanism  430  to stop operating in response to the trigger signal, and the injection module  300  stays stably at the brewing working position. 
     Similarly, in order to control the power module  400  to stop operating as required when the injection module  300  moves away from the capsule holder  200  until the sliding rail  500  disengages with the injection module  300 , so as to ensure consistent displacements of the injection module  300  each time it moves away from the capsule holder  200 , the brewing device further includes a second sensor  340 , which is also connected with the controller. The second sensor  340  is fixed to the side plate  110  and corresponds to the position of the connecting arm  320 . The second sensor  340  serves to abut against the connecting arm  320  of the injection module  300  and get triggered during rotation of the injection module  300  in a direction away from the capsule holder  200 , so that the controller controls the rotation mechanism  430  to stop operating in response to the trigger signal, thereby stopping the movement of the injection module  300 . It will be appreciated that the injection module  300  triggers the second sensor  340  after the sliding rail  500  disengages with the injection module  300 . 
     It will be appreciated that the capsule  700  may be a coffee capsule or other capsules such as a fruit tea capsule, and the working mechanism of the brewing device according to the present application will be briefly described with reference to the drawings, taking the coffee capsule as an example. 
     In an initial state, the capsule holder  200  is accommodated in the passage  130 , the capsule  700  is not provided in the accommodating cavity  211 , and the injection module  300  is at the sliding-down working position. 
     When it is desired to brew coffee, at first, the push plate  230  is pulled until the accommodating cavity  211  is exposed out of the passage  130 , the capsule  700  is filled in the accommodating cavity  211 , and the push plate  230  is pushed until the position of the capsule  700  corresponds to the brewing working position. The power module  400  is then controlled to move the injection module  300  from the sliding-down working position to the brewing working position. After this, the injection module  300  is controlled to brew with the capsule  700 . After the brewing is complete, the power module  400  is controlled to drive the injection module  300  to move from the brewing working position to the sliding-down working position; during the process, the sliding rail  500  rotates along with the injection module  300  under the drive of the driving module  600  and brings the capsule out of the accommodating cavity  211 ; when the sliding rail  500  rotates by a certain angle, the capsule  700  slides downwards along the extending direction of the sliding rail  500  and falls into a designated container; after the capsule  700  slides off, the sliding rail  500  continues to rotate along with the injection module  300  until the clamping hook  610  arranged on the sliding rail  500  is completely disengaged from the clamping strip  620  arranged on the injection module  300 , and then the sliding rail  500  reversely rotates to the initial position under the action of gravity; injection module  300  continues to move to the sliding-down working position under the drive of power module  400 . Until then, one cycle of brewing process is complete. 
     The brewing device provided by the present embodiment of the present application includes a base  100 , a capsule holder  200 , an injection module  300 , a power module  400 , a sliding rail  500  and a driving module, compared with a brewing device in a beverage machine currently available on the market. Wherein, the capsule holder  200  is provided with an accommodating cavity  211  for accommodating the capsule  700 ; one end of the sliding rail  500  is used for bearing the capsule  700 , the other end of the sliding rail  500  is rotatably mounted on the capsule holder  200 , and after the brewing process is complete, the driving module  600  can drive the sliding rail  500  to rotate along with the injection module  300  when the injection module  300  is getting away from the capsule holder  200  in a preset direction, so that the sliding rail  500  brings the capsule  700  out of the accommodating cavity  211  of the capsule holder  200 , and the capsule  700  slides down the sliding rail  500  to a designated position. Therefore, the brewing device provided by the present embodiment of the present application can realize automatic recovery of the used capsule  700  without manual operation by a user, and effectively improves the user experience. 
     It should be understood that, in the above embodiment, the injection module  300  is rotated to get away from the capsule holder  200 , but the present application is not limited thereto; for example, in other embodiments of the present application, the injection module may be moved away from the capsule holder  200  in a translational manner in a direction of a depth of the accommodating cavity  211 , and it will be appreciated that it is still possible to move the sliding rail  500  along with the injection module  300 , and the preset direction mentioned above is the direction in which the injection module  300  is translated. 
     Reference is made to  FIG. 11  which shows a perspective view of a brewing device  800  provided according to another embodiment of the present application in combination with  FIGS. 1 to 10 , the brewing device  800  differs from the brewing device in the first embodiment mainly in that: 
     the driving module  600  in the first embodiment includes a clamping hook  610  and a clamping strip  620 , and the sliding rail  500  is driven by the cooperation of the clamping hook  610  and the clamping strip  620  to realize the recovery of the capsule  700 ; and 
     a driving module  830  in the present embodiment is not provided with a clamping hook or a clamping strip, but includes a first magnetic piece  831  and a second magnetic piece  832 , and by means of mutual attraction of the first magnetic piece  831  and the second magnetic piece  832 , the sliding rail is driven to rotate during movement of the injection module in a direction away from the capsule holder, thereby realizing recovery of the capsule  700 . 
     Specifically, reference is made to  FIGS. 12 and 13  which respectively show a perspective view of an injection module  810  from one angle and a perspective view of a sliding rail  820  from one angle according to the present embodiment in combination with  FIGS. 1 to 11 , a first magnetic piece  831  is provided on the connecting arm of the injection module  810 , and a second magnetic piece  832  is provided at the position of the sliding rail  820  corresponding to the first magnetic piece  831 . One of the first magnetic piece  831  and the second magnetic piece  832  is an electromagnet which generates a magnetic field in a specific direction when powered on, and when the electromagnet is powered off, the magnetic field disappears; the other of the first magnetic piece  831  and the second magnetic piece  832  is a magnetic plate made of a magnetic material such as iron, cobalt, nickel or an alloy thereof. In the present embodiment, the first magnetic piece is an electromagnet and the second magnetic piece is a magnetic plate, and the brewing device is briefly described with reference to  FIGS. 11 to 13 . 
     One end of the magnetic plate is connected with the sliding rail  820 , and the other end of the magnetic plate extends towards the connecting arm of the injection module  810  until corresponding to the electromagnet. When the injection module  810  rotates away from the capsule holder, the electromagnet is powered on, the magnetic plate and the sliding rail  820  rotate along with the injection module under the adsorption action of the electromagnet, so that the capsule is brought out of the accommodating cavity, and the capsule slides down the sliding rail to a designated position to realize the recovery of the capsule; when the sliding-down process is complete, the electromagnet is powered off, the gravitational field between the magnetic plate and the electromagnet disappears, and the sliding rail reversely rotates to the capsule holder and rests thereon under the action of gravity. 
     Compared with the first embodiment, the capsule recovery and the resetting of the sliding rail are realized by controlling the power-on and power-off of the electromagnet, the electromagnet and the magnetic plate can be not contacted, and the failure caused by repeated contact friction of structures such as hooks, clamping strips and the like can be avoided. the present embodiment where the first magnetic piece is a magnetic plate and the second magnetic piece is an electromagnet is substantially the same as the above-described embodiment and will not be described in detail herein. 
     It should be understood that, even though one of the first magnetic piece and the second magnetic piece is an electromagnet and the other is a magnetic plate in the above embodiment, the present application is not limited thereto; for example, in other embodiments of the present application, both the first magnetic piece and the second magnetic piece may be electromagnets. Specifically, during rotation of the injection module  810  in a direction away from the capsule holder, the first magnetic piece and the second magnetic piece are powered on, so that the polarity of the ends of the first magnetic piece and the second magnetic piece in proximity is opposite, and then the sliding rail rotates along with the injection module and recovers the capsule to a specified position; after the capsule recovery is complete, the first magnetic piece and the second magnetic piece are powered on, so that the polarity of the ends of the first magnetic piece and the second magnetic piece in proximity is the same, the sliding rail is reset under the repelling action of the first magnetic piece, the first magnetic piece and the second magnetic piece can be powered off at the same time, and then the sliding rail is reset under the action of gravity. For another example, in still other embodiments of the present application, one of the first magnetic piece and the second magnetic piece is an electromagnet, and the other of the first magnetic piece and the second magnetic piece is a magnet. During the rotation of the injection module in a direction away from the capsule holder, since the iron core of the electromagnet itself is a soft magnetic material, the first magnetic piece and the second magnetic piece are attracted to each other (apart from this, the first magnetic piece may also be powered on, so that the polarity of the ends of the first magnetic piece and the second magnetic piece in proximity is opposite, and then the first magnetic piece and the second magnetic piece can be attracted to each other), and therefore the sliding rail rotates along with the injection module and realizes capsule recovery; when the capsule is recovered, the first magnetic piece may be powered on, so that the polarity of the ends of the first magnetic piece and the second magnetic piece in proximity is the same, and then the sliding rail is reset under the repelling action between the first magnetic piece and the second magnetic piece. 
     Reference is made to  FIGS. 14 and 17  which respectively show a perspective view of a brewing device  900 , and a perspective view of the sliding rail provided in yet another embodiment of the present application from two angles, as well as an enlarged view at B, in combination with  FIGS. 1 to 13 , the brewing device  900  differs from the brewing device  800  in the second embodiment mainly in that: 
     the driving module of the brewing device  800  in the second embodiment includes a first magnetic piece and a second magnetic piece, wherein the first magnetic piece is arranged on the injection module, the second magnetic piece is arranged on the sliding rail, one of the first magnetic piece and the second magnetic piece is an electromagnet, the other one of the first magnetic piece and the second magnetic piece is a magnetic plate, a magnet or an electromagnet which can be attracted by the electromagnet, and the recovery of the capsule is realized through the cooperation of the first magnetic piece and the second magnetic piece; and 
     the driving module of the brewing device  900  in the third embodiment still includes a first magnetic piece and a second magnetic piece, wherein the first magnetic piece is arranged on the injection module, and the second magnetic piece is arranged on the sliding rail, one of the first magnetic piece and the second magnetic piece is a magnet and the other is a magnetic plate made of a magnetic material such as iron, cobalt, nickel and the like or an alloy thereof. Hereinafter, for example, the first magnetic piece is a magnet and the second magnetic piece is a magnetic plate, and the present embodiment will be briefly described with reference to the accompanying drawings. 
     After the brewing is complete, when an injection module  910  rotates in a direction away from the capsule holder, the first magnetic piece and the second magnetic piece are attracted to each other, and then the second magnetic piece and a sliding rail  920  rotate along with the injection module  910  under the attraction of the first magnetic piece, so that the capsule is brought out of the accommodating cavity and slides down the sliding rail to a designated position to realize the recovery of the capsule. When the capsule needs to be refilled, the user only needs to pull out the capsule holder by means of the push plate, the second magnetic piece is displaced along with the capsule holder until the second magnetic piece is disengaged from the attraction of the first magnetic piece, and the sliding rail  920  is reset under the action of gravity. 
     Compared with the second embodiment, the brewing device provided by the present embodiment does not use an electromagnet, so that the cost of circuitry is reduced, and the electric energy can be saved to a certain extent. 
     Furthermore, the brewing device provided in the present embodiment can realize successfully capsule recovery through the cooperation of the first magnetic piece and the second magnetic piece, and the user experience is improved; however, after the capsule is recovered, the sliding rail cannot be automatically reset in time, but is passively reset in the process of pulling out the capsule holder. The reset process of the sliding rail is not stable because the force applied by the user each time can vary greatly, the sliding rail  920  may damage the injection module and the capsule holder when the force applied by the user is too vigorous. In order to eliminate such a defect, the brewing device provided by the present embodiment further includes a limiting module  930  used for preventing the sliding rail  920  from continuing to rotate along with the injection module  910  when the sliding rail  920  rotates away from the capsule holder for a set angular displacement, so that the sliding rail  920  is reset under the action of gravity. Notably, before the sliding rail  920  rotates for the preset angular displacement, the capsule has been recovered. 
     Specifically, reference is made to  FIGS. 16 through 17  and in combination with  FIGS. 1 through 15 , the limiting module  930  includes a first limiting part  931  disposed on the sliding rail  920  and a second limiting part  932  disposed on the base, the first limiting part  931  and the second limiting part  932  abut against each other while the injection module  910  moves away from the capsule holder, so that the sliding rail  920  stops following the rotation of the injection module  910  and resets under the action of gravity. In the present embodiment, the first limiting part  931  is a limiting column connected with the bent part of the sliding rail  920  through a connecting column  921 ; one end of the connecting column  921  is connected with one end of the bent part distal to the sliding guide part, the other end of the connecting column  921  extends away from the sliding guide part and simultaneously extends upwards, the limiting column is arranged at one end of the connecting column  921  distal to the bent part and extends in parallel with the pin shaft; the second limiting part  932  is a limiting plate horizontally fixed at one end, distal to the push plate of the capsule holder, of the side plate. When the injection module  910  is in the brewing state, the limiting column is positioned above the limiting plate, and when the injection module moves to the sliding-down working position, the limiting column rotates to abut against the limiting plate with the pin shaft as a rotation center, so that the sliding rail  920  does not move along with the injection module any longer, and the sliding rail can be reset under the action of gravity. 
     It should be understood that, in other embodiments of the present application, the first limiting part and the second limiting part may be of other structures, for example, the first limiting part is a limiting plate, and correspondingly, the second limiting part is a limiting column, as long as the first limiting part and the second limiting part are used for cooperating together to prevent the sliding rail  920  from continuing to rotate with the injection module when the sliding rail  920  rotates a preset angular displacement in a direction away from the capsule holder; the limit module may also be applied to the second embodiment to prevent the sliding rail  920  from continuing to rotate with the injection module when the slide rotates a preset angular displacement away from the capsule holder. 
     It should also be understood that, in other embodiments of the present application, the first magnetic piece and the second magnetic piece may each be a magnet, and a substantially the same manner as the above embodiment by which capsule recovery and sliding rail resetting are accomplished is provided, and thus such an embodiment will not be described in detail herein. Moreover, it can be seen by referring to the above second embodiment that the combination of the first magnetic piece and the second magnetic piece is various, so long as it is ensured that the first magnetic piece and the second magnetic piece can be mutually attracted when the injection module is getting away from the capsule holder in the preset direction, and thus one end, proximate to the cup holder, of the sliding rail gets away from the capsule holder to complete the recovery of the capsule. 
     Reference is made to  FIGS. 18 and 19  which show a perspective view of a brewing device  1000  according to still another embodiment of the present application with the side plate not shown, and a partially enlarged view at C, in combination with  FIGS. 1 to 17 , the brewing device  1000  differs from the brewing devices of the first, second and third embodiments in that: 
     the driving module of the brewing device in the first embodiment includes a clamping hook and a clamping strip, and the driving module of the brewing devices in the second embodiment and the third embodiment include a first magnetic piece and a second magnetic piece; 
     while a driving module  1300  in the present embodiment includes a rotation mechanism  1310  having an output connected with a sliding rail  1200 , for driving the sliding rail  1200  to rotate during the movement of the injection module  1100  away from the capsule holder so that the sliding rail  1200  brings the capsule out of the accommodating cavity and slides it to a designated position, the rotation mechanism  1310  is also used for driving the sliding rail  1200  to reset after the capsule is successfully recovered. In the present embodiment, the rotation mechanism  1310  is an electric motor, and it will be appreciated that in other embodiments of the present application, the rotation mechanism  1310  may also be a rotary cylinder or other mechanisms capable of rendering a rotational output, which is not limited herein. 
     Furthermore, in order to avoid interference between the sliding rail  1200  and the injection module  1100  due to too high rotation speed of the output of the rotation mechanism  1310 , the driving module further includes a first gear  1320  and a second gear  1330 , wherein the first gear  1320  is fixedly connected with the output end of the rotation mechanism  1310 , and the second gear  1330  is coaxially sleeved on the pin shaft of the sliding rail  1200 , that is, the rotation mechanism  1310  changes speed by means of the first gear  1320  and the second gear  1330 , so that the sliding rail  1200  can have an appropriate rotation speed, capable of taking out the capsule and avoiding interference with the injection module  1100 . 
     According to the brewing device provided by the present embodiment of the present application, the self-service recovery of the capsule can also be realized, and the user experience can be effectively improved. 
     On the basis of the same concept, the present application also provides a beverage machine including a housing and the brewing device as provided in any of the above embodiments. By advantage of the brewing device, the beverage machine can realize self-service recovery of the capsule, and the user experience can be effectively improved. 
     Finally, it should be noted that the above examples are intended only to illustrate the technical solutions of the present application, not to be limiting; the above embodiments or technical features in different embodiments may also be combined, the steps may be carried out in any order according to the idea of the present application, and many other variations in different aspects of the present application as described above exist, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions of the above embodiments can still be modified, or some of the technical features thereof may found their equivalents; and these modifications and equivalents do not render departures from the scope of the present embodiments of the present application.