Capsule puncturing device and coffee machine

Abstract

The invention provides a capsule puncturing device and a coffee machine. The capsule puncturing device comprises a puncturing head which is internally provided with a water inlet channel, an air inlet channel and a water outlet channel; the positioning frame is movably arranged on the puncturing head; the capsule fixing frame is used for fixing a capsule and arranged on the positioning frame, when the capsule fixing frame is pressed towards the direction of the positioning frame, the capsule fixing frame drives the capsule to move and pushes the positioning frame to move relative to the puncturing head, so that the puncturing head punctures the capsule, and a water inlet channel, an air inlet channel and a water outlet channel in the puncturing head all communicate with the capsule; and the control assembly is used for controlling the water path and the air path to supply water and air to the water inlet channel and the air inlet channel respectively when the puncturing head punctures the capsule. According to the capsule puncturing device, when the capsule is punctured, gas and water are supplied into the capsule at the same time, the gas and the water are fused with beverage powder to generate a beverage with fine foam and smooth taste, and the capsule puncturing device is simple in structure, convenient to control and high in practicability.

Description

Technical Field

[0001] The present application belongs to the technical field of beverage preparation, and in particular relates to a capsule puncturing device and a coffee machine. Background Art

[0002] As people's living standards improve, their taste requirements for beverages are getting higher and higher. Mixing nitrogen in beverages can not only produce delicate foam and smooth taste, but also the right amount of nitrogen can support the respiratory process, maintain air pressure balance, form amino acids, transport metabolites, and help cell repair.

[0003] At present, the piercing device of the existing capsule coffee machine does not support the combination of piercing and nitrogen, and the structure and function are single. For example, the Chinese patent application with publication number CN106580107A discloses an air pressure coffee capsule maker, which is equipped with a pressure maker under the piercing head, and uses the pressure maker to replace the existing capsule coffee pump pressure and boiler self-pressure water supply method, but cannot achieve mixing nitrogen into the beverage. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, an object of the embodiments of the present application is to provide a capsule puncturing device and a coffee machine capable of mixing gas (such as nitrogen) into a beverage.

[0005] The technical solution adopted in the embodiment of the present application is a capsule puncturing device, comprising:

[0006] A puncture head having a water inlet channel, an air inlet channel and a water outlet channel;

[0007] A positioning frame, which is movably arranged on the puncturing head;

[0008] a capsule fixing frame, which is used to fix the capsule and is arranged on the positioning frame. When the capsule fixing frame is pressed toward the positioning frame, the capsule fixing frame drives the capsule to follow and pushes the positioning frame to move relative to the piercing head, so that the piercing head pierces the capsule, and the water inlet channel, the air inlet channel and the water outlet channel in the piercing head are all connected with the capsule;

[0009] A control component is used for controlling a water path and an air path respectively connected to the water inlet channel and the air inlet channel to supply water and air to the water inlet channel and the air inlet channel when the puncturing head punctures the capsule.

[0010] In an optional embodiment, the piercing head includes a main body and a flange arranged around the outer circumference of the main body, and the first end of the main body forms a piercing portion for piercing the capsule;

[0011] The positioning frame has a through hole, and the positioning frame is sleeved on the main body of the puncturing head through the through hole and is located between the first end of the main body and the flange; an elastic component is provided between the positioning frame and the flange of the puncturing head, and the elastic component is used to apply a force to the positioning frame to move toward the capsule fixing frame. The structural design of the puncturing head and the positioning frame is reasonable, so that the positioning frame can be movably arranged on the puncturing head.

[0012] In an optional embodiment, the first end of the main body of the puncturing head is recessed inward to form a cavity, and the periphery of the cavity opening of the cavity forms the puncturing portion;

[0013] The bottom of the concave cavity is provided with the water outlet hole connected to the water inlet channel, the air outlet hole connected to the air inlet channel and the first water outlet connected to the water outlet channel. When the piercing head pierces the capsule, the water outlet hole, the air outlet hole and the first water outlet are connected to the inside of the capsule respectively.

[0014] In an optional embodiment, a second drain port communicating with the drain channel is provided on a peripheral wall of the main body near the first end thereof;

[0015] The end of the positioning frame facing the capsule fixing frame is recessed downward to form an annular cavity surrounding the through hole, and a sealing gasket is arranged in the annular cavity; when the capsule fixing frame is pressed toward the positioning frame, the outer periphery of the mouth of the capsule is tightly attached to the sealing gasket and encloses a cavity, the first end of the main body extends out of the positioning frame and lifts up the sealing cover of the capsule, and the second drain port enters the cavity. By providing the second drain port, the beverage can be discharged quickly and smoothly.

[0016] In an optional embodiment, an annular groove is provided on the outer peripheral wall between the first end of the main body of the piercing head and the flange, and an O-ring is provided in the annular groove, and the O-ring is used to seal between the hole wall of the through hole and the outer wall of the main body. The beverage in the capsule is sealed by the cooperation of the O-ring and the sealing gasket, so that it can only be discharged through the first drain port and the second drain port.

[0017] In an optional embodiment, the air inlet channel extends in a direction from the first end of the main body to the second end thereof, and the first end of the air inlet channel passes through the first end of the main body to form an air outlet; a control valve is provided in the air inlet channel, and when the puncturing head punctures the capsule and the control component controls the air circuit to supply air to the air inlet channel, the control valve opens the air outlet under the action of the gas to allow the gas to enter the capsule, and when the air circuit stops supplying air, the control valve closes the air outlet.

[0018] In an optional embodiment, the second end of the air inlet passage is located near the second end of the main body, and a side portion of the main body near the second end is provided with an air inlet communicating with the air inlet passage;

[0019] The control valve includes a first push rod, a first reset member and a first sealing ring, the first end of the first push rod corresponds to the air outlet, the first sealing ring is sleeved on the first push rod near its second end and away from the first end of the first push rod relative to the air inlet; when gas is introduced into the air inlet passage, the first push rod can move in a direction away from the air outlet so that the first end thereof opens the air outlet; the first reset member acts on the first push rod to apply a force to the first push rod to make the first end of the first push rod move in a direction close to the air outlet to block the air outlet.

[0020] In an optional embodiment, the control assembly includes a second push rod, a microswitch and a second reset member, the microswitch is fixed on the puncturing head, the second push rod is movably provided on the puncturing head and can move relative to the microswitch to trigger the microswitch or release the triggering of the microswitch; when the capsule fixing frame is pressed toward the positioning frame, the positioning frame pushes the second push rod to move and trigger the microswitch, and when the pressure on the capsule fixing frame is released, the second push rod moves in the opposite direction of the pressing under the action of the second reset member and releases the triggering of the microswitch; wherein, when the microswitch is triggered, the water circuit and the air circuit are started to supply water and air to the water inlet channel and the air inlet channel respectively.

[0021] In an optional embodiment, the capsule puncturing device further comprises a two-way valve and a three-way valve, wherein the first port of the two-way valve is connected to the water outlet of the sewer channel, and the second port of the two-way valve is connected to the first port of the three-way valve; when the puncturing head punctures the capsule after a first preset time, the two-way valve is opened, and the first port of the three-way valve is connected to its second port, the first port of the three-way valve is disconnected from the third port of the three-way valve, and the beverage fused with gas in the capsule is discharged through the second port of the three-way valve; after the beverage is discharged, the first port of the three-way valve is disconnected from the second port of the three-way valve, the first port of the three-way valve is connected to the third port of the three-way valve, and the residual water and residual gas in the puncturing head are discharged through the third port of the three-way valve, thereby ensuring the cleanliness of the capsule puncturing device.

[0022] A coffee machine comprises the capsule piercing device in any one of the above embodiments.

[0023] Compared with the prior art, the beneficial effect of the embodiment of the present application is that the capsule puncturing device of the embodiment of the present application can mix gas (such as nitrogen) into a beverage (such as coffee liquid), and has a simple structure, easy operation and strong practicality.

[0024] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0025] The overview of various implementations or examples of the technology described in this application is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, serve to illustrate the claimed embodiments. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts.

[0027] Figure 1 This is an exploded view of the capsule puncturing device according to an embodiment of the present application.

[0028] Figure 2 and Figure 3 They are cross-sectional views of the capsule puncturing device of an embodiment of the present application from different perspectives.

[0029] Figure 4 This is a schematic diagram of the structure of the puncture head according to an embodiment of the present application.

[0030] Figure 5 This is a schematic diagram of the structure in which a capsule according to an embodiment of the present application is assembled on a capsule fixing frame.

[0031] Figure 6 This is a schematic diagram of the structure of the capsule puncturing device according to an embodiment of the present application when the capsule is not punctured.

[0032] Figure 7 This is a cross-sectional view of the capsule puncturing device according to an embodiment of the present application when the capsule is not punctured.

[0033] Figure 8 Schematic diagram of the structure of the capsule puncturing device according to an embodiment of the present application in the capsule puncturing state.

[0034] Figures 9 to 11 They are cross-sectional views of the capsule puncturing device of an embodiment of the present application at different viewing angles in a capsule puncturing state.

[0035] Reference numerals:

[0036] 1-piercing head; 11-main body; 111-concave cavity; 112-piercing part; 12-flange; 13-annular groove; 131-O-ring; 14-water inlet channel; 141-water outlet hole; 142-water inlet; 15-air inlet channel; 151-air outlet hole; 152-air inlet; 16-water discharge channel; 161-first water discharge outlet; 162-second water discharge outlet; 163-water outlet; 17-extension channel; 18-upper mounting frame; 19-lower mounting frame;

[0037] 2-positioning frame; 21-sealing pad; 22-convex part; 23-chamber;

[0038] 3- elastic component;

[0039] 4-capsule fixing frame; 41-capsule accommodating chamber; 42-supporting foot; 43-capsule; 431-cover;

[0040] 5-control valve; 51-first push rod; 52-first reset member; 53-first sealing ring;

[0041] 6-control component; 61-second push rod; 62-micro switch; 63-second reset member; 64-trigger component;

[0042] 7-two-way valve; 8-three-way valve; 81-third port. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] In order to keep the following description of the embodiments of the present application clear and concise, the present application omits detailed descriptions of known functions and known components.

[0046] The present application provides a capsule puncturing device. Figures 1 to 10 As shown, the capsule puncturing device includes a puncturing head 1, a positioning frame 2, a capsule fixing frame 4 and a control component 6.

[0047] The piercing head 1 has a water inlet channel 14, an air inlet channel 15 and a water discharge channel 16. The positioning frame 2 is movably arranged on the piercing head 1. When the positioning frame 2 moves relative to the piercing head 1, the piercing portion 112 of the piercing head 1 can be extended out of the positioning frame 2 or retracted into the positioning frame 2. The capsule fixing frame 4 is used to fix the capsule 43 and is arranged on the positioning frame 2. When the capsule fixing frame 4 is pressed toward the positioning frame 2, the capsule fixing frame 4 drives the capsule 43 to follow and pushes the positioning frame 2 to move relative to the piercing head 1, so that the piercing portion 112 of the piercing head 1 extends out of the positioning frame 2 and pierces the capsule 43. After the capsule 43 is pierced, the water inlet channel 14, the air inlet channel 15 and the water discharge channel 16 in the piercing head 1 are all connected with the capsule 43. The control component 6 is used to control the water circuit and the air circuit (the water circuit and the air circuit may be equipment used in the capsule piercing device, such as the water circuit and the air circuit of a coffee machine) to supply air and water to the water inlet channel 14 and the air inlet channel 15 respectively when the piercing head 1 pierces the capsule 43. The water and gas supplied into the water inlet channel 14 and the air inlet channel 15 then enter the capsule 43 respectively, and melt with the beverage powder in the capsule 43 to generate a beverage containing gas, which is discharged from the drain channel 16 for the user to drink.

[0048] The capsule puncturing device of the embodiment of the present application can simultaneously supply gas and water into the capsule 43 when the capsule 43 is punctured, and fuse them with the beverage powder to generate a beverage with delicate foam and smooth taste.

[0049] It is understandable that the gas may be, for example, carbon dioxide, nitrogen, oxygen or air, and the present application uses nitrogen as an example for illustration.

[0050] In some embodiments, Figure 4As shown, the puncturing head 1 includes a main body 11 and a flange 12 arranged around the outer periphery of the main body 11, and the first end of the main body 11 forms a puncturing portion 112 for puncturing the capsule 43. The positioning frame 2 has a through hole (the through hole is not shown because it is blocked by the main body 11 of the puncturing head 1), and the positioning frame 2 is sleeved on the main body 11 of the puncturing head 1 through the through hole, and is located between the first end of the main body 11 and the flange 12. An elastic component 3 is provided between the positioning frame 2 and the flange 12 of the puncturing head 1, and the elastic component 3 is used to apply a force to the positioning frame 2 to move it toward the direction close to the capsule fixing frame 4. The structural design of the puncturing head 1 and the positioning frame 2 is reasonable, which facilitates the positioning frame 2 to be movably arranged on the puncturing head 1.

[0051] Exemplary, continue to combine Figure 4 The main body 11 of the piercing head 1 is roughly cylindrical, and the flange 12 is arranged near the middle of the main body 11. The elastic component 3 can be a spring, and the spring is sleeved outside the main body 11. The lower end of the spring (the upper and lower in this embodiment are based on the orientation in the figure, that is, the downward end of each component in the figure is defined as the respective lower end, and the upward end is defined as the respective upper end) is against the flange 12, and the upper end of the spring is against the lower end of the positioning frame 2, which is used to apply an upward force to the positioning frame 2. When the capsule fixing frame 4 is pressed downward, the positioning frame 2 moves downward at the same time and compresses the spring. Since the piercing head 1 is fixed, the upper end of the piercing head 1 (that is, the first end of the main body 11, that is, the piercing portion 112) extends out of the positioning frame 2 and contacts with the capsule 43 to pierce the capsule 43. When the pressed capsule fixing frame 4 is released, the positioning frame 2 pushes the capsule fixing frame 4 upward and resets under the action of the spring, and the piercing portion 112 of the piercing head 1 retracts into the positioning frame 2 and separates from the capsule 43.

[0052] In some embodiments, Figure 4 As shown, the first end of the main body 11 of the piercing head 1 is recessed inward to form a concave cavity 111, and the periphery of the cavity opening of the concave cavity 111 forms a piercing portion 112. The cavity bottom of the concave cavity 111 is provided with a water outlet 141 connected to the water inlet channel 14, an air outlet 151 connected to the air inlet channel 15, and a first water outlet 161 connected to the water outlet channel 16. In this way, when the piercing head 1 pierces the capsule 43, the water outlet 141, the air outlet 151 and the first water outlet 161 are respectively connected to the inside of the capsule 43, so that nitrogen and water can be respectively filled into the capsule 43 through the water outlet 141 and the air outlet 151, and the beverage mixed with nitrogen in the capsule 43 is sent to the water outlet 16 through the first water outlet 161.

[0053] Further, continue to combine Figure 4A second water outlet 162 is provided on the peripheral wall of the main body 11 near the first end thereof, which is connected to the water outlet channel 16. By providing the second water outlet 162, the beverage can be discharged quickly and smoothly, the discharge speed is increased, and the waiting time of the user is reduced.

[0054] In some embodiments, one end of the positioning frame 2 facing the capsule fixing frame 4 (i.e., the upper end of the positioning frame 2) is recessed downward to form an annular cavity surrounding the through hole (the annular cavity is not shown in the figure because it is filled with a sealing gasket 21), and a sealing gasket 21 is provided in the annular cavity. When the capsule fixing frame 4 is pressed toward the positioning frame 2, the outer periphery of the mouth of the capsule 43 is tightly attached to the sealing gasket 21 and encloses the chamber 23, the first end of the main body 11 extends out of the positioning frame 2 and lifts up the sealing cover 431 for sealing the mouth of the capsule 43, and at the same time, the second water outlet 162 enters the chamber 23, see Figure 2 By providing the sealing pad 21 on the positioning frame 2 , not only can the beverage discharged from the mouth of the capsule 43 be sealed to prevent leakage, but also a chamber 23 communicating with the capsule 43 can be formed so that the beverage in the capsule 43 can be discharged through the second drain port 162 .

[0055] like Figure 4 As shown, an annular groove 13 is provided on the outer peripheral wall between the first end of the main body 11 of the piercing head 1 and the flange 12, and an O-ring 131 is provided in the annular groove 13. The O-ring 131 is used to seal between the hole wall of the through hole and the outer wall of the main body 11. Through the cooperation between the O-ring 131 and the sealing gasket 21, the beverage in the capsule 43 is sealed so that it can only be discharged through the first drain port 161 and the second drain port 162, and the beverage is prevented from leaking between the main body 11 of the piercing head 1 and the positioning frame 2.

[0056] In some embodiments, Figure 1 As shown, the capsule holder 4 has a capsule accommodating chamber 41, and the side of the capsule holder 4 has an opening communicating with the capsule accommodating chamber 41, through which the capsule 43 can be loaded and unloaded from the capsule accommodating chamber 41. When the capsule 43 is loaded into the capsule accommodating chamber 41, it can be fixed therein, as shown in FIG. Figure 5 shown.

[0057] Continue to combine Figure 1 and Figure 5 The capsule fixing frame 4 is provided with four legs 42 on one side facing the positioning frame 2. The outer peripheral wall of the positioning frame 2 is provided with four protrusions 22 with holes, and the four legs 42 of the capsule fixing frame 4 are inserted into the holes of the four protrusions 22 of the positioning frame 2 one by one. In this way, when the capsule fixing frame 4 is pressed, the positioning frame 2 can be pressed down at the same time to move relative to the piercing head 1.

[0058] In some embodiments, Figure 3As shown, the air inlet channel 15 extends from the first end of the main body 11 to the second end thereof, and the first end of the air inlet channel 15 passes through the first end of the main body 11 and forms an air outlet 151. A control valve 5 is provided in the air inlet channel 15. When the piercing head 1 pierces the capsule 43 and the control component 6 controls the air circuit to supply nitrogen to the air inlet channel 15, the control valve 5 opens the air outlet 151 under the action of the nitrogen in the air inlet channel 15 to allow the nitrogen to enter the capsule 43. When the air circuit stops supplying air, the control valve 5 closes the air outlet 151. By providing the control valve 5 controlled by the control component 6 in the air inlet channel 15, the air intake start time can be accurately controlled according to the beverage preparation process, the air intake amount and air intake effect can be ensured, and a nitrogen beverage with a smooth and delicate taste can be prepared, thereby increasing the taste level of the beverage.

[0059] Continue to combine Figure 3 and Figure 4 The second end of the air inlet passage 15 is located near the second end of the main body 11, and the side of the main body 11 near the second end thereof is provided with an air inlet 152 connected to the air inlet passage 15. Figure 1 and Figure 3 As shown, the control valve 5 includes a first push rod 51, a first reset member 52 and a first sealing ring 53. The first end (upper end) of the first push rod 51 corresponds to the air outlet 151, and the first sealing ring 53 is sleeved on the first push rod 51 near its second end (lower end) and is away from the first end of the first push rod 51 relative to the air inlet 152, that is, the first sealing ring 53 is located below the air inlet 152, and divides the air inlet channel 15 into a first part and a second part that are relatively independent and not connected to each other, and the air inlet 152 and the air outlet 151 are respectively connected to the first part, and are not connected to the second part, see Figure 7 and Fig. 9 In fact, the first push rod 51, the first sealing ring 53 and the air inlet passage 15 cooperate to form a piston-like structure, the first sealing ring 53 is equivalent to the piston, and the first push rod 51 is equivalent to the piston rod. The first reset member 52 acts on the first push rod 51 to apply a force to the first push rod 51 to move the first end of the first push rod 51 toward the direction close to the air outlet 151 to block the air outlet 151.

[0060] When the air inlet 152 is opened, the gas enters the first part of the air inlet channel 15, the air pressure in the first part increases, and pushes the first push rod 51 to move toward the second part of the air inlet channel 15 (i.e., downward), so that the first end of the first push rod 51 moves away from and opens the air outlet 151. When the air intake stops, the gas in the first part of the air inlet channel 15 continues to be discharged from the air outlet 151 and the air pressure gradually decreases. When the force of the first reset member 52 acting on the first push rod 51 can overcome the pressure of the gas acting on the first push rod 51, the first push rod 51 moves toward the air outlet 151 under the action of the first reset member 52, and blocks the air outlet 151, and no longer supplies air to the capsule 43 through the air outlet 151, completing the air intake operation.

[0061] In order to facilitate demoulding of the puncture head 1 during the manufacturing process, the second end of the air inlet channel 15 continues to extend toward the second end of the main body 11 of the puncture head 1 to form an extension channel 17. The inner diameter of the extension channel 17 is smaller than the inner diameter of the air inlet channel 15, so that a step portion is formed between the two. One end of the first reset member 52 abuts on the step portion, and the other end abuts on a boss provided on the peripheral wall of the first push rod 51. The first sealing ring 53 is located in the portion of the air inlet channel 15 close to the extension channel 17, and is used to seal between the first push rod 51 and the inner wall of the air inlet channel 15. The first sealing ring 53 not only separates the air inlet channel 15 into two unconnected parts, but also prevents gas from leaking out of the extension channel 17.

[0062] Furthermore, in order to ensure that the first push rod 51 is lifted and lowered smoothly under the action of the gas and the first restoring member 52, so as to achieve the blocking or opening of the gas outlet 151, as shown in FIG. Figure 3 As shown, the first push rod 51 is provided with a plurality of ridges extending along its axial direction, and the plurality of ridges are arranged around the outer peripheral wall of the first push rod 51. The ridges are away from the first push rod 51 and parallel to the axial side of the first push rod 51 and close to the inner wall of the air intake passage 15. In this way, the shaking of the first push rod 51 in the air intake passage 15 can be reduced.

[0063] In order to facilitate the connection of the puncture head 1 with the gas circuit and the water circuit, as shown in FIG. Figure 4 As shown, the air inlet 152 and the water inlet 142 are not only arranged on the side of the piercing head 1, but also extend outward to form a tube. The water outlet 163 of the water discharge channel 16 is arranged at the bottom of the piercing head 1 (i.e., the end of the piercing head 1 away from the capsule 43), and extends downward to form a tube to facilitate the discharge of coffee liquid.

[0064] In some embodiments, Figure 1 and Figure 6As shown, the control assembly 6 includes a second push rod 61, a micro switch 62 and a second reset member 63. The micro switch 62 is fixed on the puncture head 1. The second push rod 61 is movably arranged on the puncture head 1 and can move relative to the micro switch 62 to trigger the micro switch 62 or release the trigger of the micro switch 62. When the capsule fixing frame 4 is pressed toward the positioning frame 2, the capsule fixing frame 4 drives the positioning frame 2 to move relative to the puncture head 1, and the positioning frame 2 simultaneously pushes the second push rod 61 to move, so that the second push rod 61 triggers the micro switch 62. When the pressure on the capsule fixing frame 4 is cancelled, the second push rod 61 moves in the opposite direction of the pressing under the action of the second reset member 63, and releases the trigger of the micro switch 62. When the micro switch 62 is triggered, the water circuit and the gas circuit are activated to supply water and gas to the water inlet channel 14 and the gas inlet channel 15 respectively. When the micro switch 62 is released, the water circuit and the gas circuit are closed to stop the water supply and gas supply.

[0065] Continue to combine Figure 1 and Figure 6 The portion of the puncturing head 1 below the flange 12 is provided with an upper mounting frame 18 and a lower mounting frame 19, which are arranged opposite to each other and are provided with corresponding mounting holes (not shown in the figure). The two ends of the second push rod 61 pass through the mounting holes on the upper mounting frame 18 and the lower mounting frame 19, respectively, and the upper end of the second push rod 61 is located below the positioning frame 2. The second push rod 61 is provided with a trigger component 64 protruding from its outer peripheral wall, and the second reset member 63 can be a spring and is sleeved on the second push rod 61, and the two ends of the second reset member 63 are respectively against the trigger component 64 and the lower mounting frame 19. When the positioning frame 2 moves downward under the pressure of the capsule fixing frame 4, the lower end of the positioning frame 2 (the end of the positioning frame 2 away from the capsule fixing frame 4) pushes the second push rod 61 downward, so that the second push rod 61 moves downward, and the trigger component 64 on the second push rod 61 moves with it, and triggers the micro switch 62 after moving a preset distance, so that the water circuit and the air circuit are opened, and water and air are supplied to the capsule 43 through the water inlet channel 14 and the air inlet channel 15; at the same time, the second reset member 63 is compressed and continues to exert elastic potential energy. When the air and water supply is completed, the pressure on the capsule fixing frame 4 is released, the second reset member 63 releases the elastic potential energy, and the second push rod 61 moves upward and resets under the action of the second reset member 63. At the same time, the trigger component 64 moves upward with the second push rod 61, and the micro switch 62 is released. The air circuit and the water circuit are closed, and the air and water supply to the capsule 43 stops.

[0066] In some embodiments, Figures 1 to 3As shown, the capsule piercing device further includes a two-way valve 7 and a three-way valve 8. The first port of the two-way valve 7 is connected to the water outlet 163 of the water channel 16, and the second port of the two-way valve 7 is connected to the first port of the three-way valve 8. After the piercing head 1 pierces the capsule 43 for a first preset time, the two-way valve 7 is opened, and the first port of the three-way valve 8 is connected to the second port, and the first port of the three-way valve 8 is cut off from the third port 81 of the three-way valve 8, and the beverage fused with gas in the capsule 43 is discharged through the second port of the three-way valve 8; after the beverage is discharged, the first port of the three-way valve 8 is cut off from the second port of the three-way valve 8, and the first port of the three-way valve 8 is connected to the third port 81 of the three-way valve 8, and the residual water and residual gas in the piercing head 1 are discharged through the third port 81 of the three-way valve 8.

[0067] It can be understood that the two-way valve 7 is equivalent to a switch valve and is a normally closed valve. During the puncture of the capsule 43 and the supply of air and water, the two-way valve 7 remains closed. When the puncture head 1 punctures the capsule 43 for a first preset time, the nitrogen and water supplied are mixed with the coffee powder in the capsule 43 for a period of time, and the two-way valve 7 is opened after being fully fused, so that the coffee liquid mixed with nitrogen in the capsule 43 is discharged through the second port of the three-way valve 8. After the discharge of the coffee liquid is completed, the conduction state of the three-way valve 8 is switched so that the first port is disconnected from its second port, and the first port is connected to its third port 81, and the third port 81 is used to discharge the residual water and residual gas, so as to ensure that the puncture device is clean and improve the hygienic safety.

[0068] The working process of the capsule puncturing device of the embodiment of the present application is described below with reference to the accompanying drawings:

[0069] like Figure 6 As shown, when the capsule puncturing device is not working and the capsule fixing frame 4 is not pressed, the lower end of the positioning frame 2 is not in contact with the upper end of the second push rod 61, and a certain distance is left. At this time, the micro switch 62 is not triggered, the air path and the water path are both closed and not opened, and the second reset member 63 is not compressed and maintains a natural state. In addition, the upper end of the first push rod 51 blocks the air outlet 151, and the first reset member 52 is not compressed and maintains a natural state. Figure 7 .

[0070] When it is necessary to prepare coffee, the capsule fixing frame 4 is pressed downward, driving the positioning frame 2 to move downward and press against the upper end of the second push rod 61. The capsule fixing frame 4 is pressed continuously, and the positioning frame 2 will push the second push rod 61 to move downward. The trigger component 64 on the second push rod 61 moves accordingly and triggers the micro switch 62. At the same time, the second reset member 63 is compressed. Figure 8As the micro switch 62 is triggered, the water circuit and the gas circuit are controlled to be opened, and water and gas are respectively introduced into the water inlet channel 14 and the gas inlet channel 15. The water directly enters the capsule 43 through the water inlet channel 14 to brew the coffee powder in the capsule 43 to form the coffee concentrate, and the gas entering the gas inlet channel 15 will push the first push rod 51 to move downward to open the gas outlet 151. Fig. 9 and Fig.10 , so that the gas enters the capsule 43 and merges into the coffee concentrate to form coffee liquid mixed with gas. Fig. 9 and Fig.10 The broken line arrow indicates the direction of gas inlet, and the dotted line arrow indicates the direction of water inlet. After mixing for a period of time, the two-way valve 7 is opened, and the three-way valve 8 is in a state where its first port and second port are connected, and the coffee liquid mixed with gas in the capsule 43 is discharged through the second port of the two-way valve 7 and the three-way valve 8 for the user to drink. Fig.11 .in, Fig.11 The downward straight arrow in the middle indicates the direction of coffee liquid outflow.

[0071] The embodiment of the present application also provides a coffee machine, which includes a machine body and a water circuit, an air circuit and a control system arranged on the machine body, and the coffee machine also includes a capsule puncturing device in any of the above embodiments. The air inlet 152 of the air inlet channel 15 of the puncturing head 1 of the capsule puncturing device is connected to the air circuit, and the water inlet 142 of the water inlet channel 14 of the puncturing head 1 is connected to the water circuit. The control system can receive a signal sent when the micro switch 62 is triggered, and control the opening and closing of the water circuit and the air circuit based on the received signal.

[0072] It is understandable that both the two-way valve 7 and the three-way valve 8 can be solenoid valves, and connected to the control system of the coffee machine. The opening and closing of the solenoid valves are also controlled by the control program of the control system. The control principle of this part is the same as the prior art, and this application will not explain it in detail.

[0073] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A capsule puncturing device, characterized in that: include: The puncturing head (1) has a water inlet channel (14), an air inlet channel (15) and a water outlet channel (16); A positioning frame (2) movably arranged on the puncturing head (1); A capsule fixing frame (4) is used to fix the capsule (43) and is arranged on the positioning frame (2). When the capsule fixing frame (4) is pressed in the direction of the positioning frame (2), the capsule fixing frame (4) drives the capsule (43) to follow and pushes the positioning frame (2) to move relative to the piercing head (1), so that the piercing head (1) pierces the capsule (43), and the water inlet channel (14), the air inlet channel (15) and the water outlet channel (16) in the piercing head (1) are all connected to the capsule (43); A control component (6) is used to control a water path and an air path respectively connected to the water inlet channel (14) and the air inlet channel (15) to supply water and air to the water inlet channel (14) and the air inlet channel (15) when the puncturing head (1) punctures the capsule (43).

2. The capsule puncturing device according to claim 1, characterized in that: The piercing head (1) comprises a main body (11) and a flange (12) arranged around the outer circumference of the main body (11), and a piercing portion (112) for piercing a capsule (43) is formed at a first end of the main body (11); The positioning frame (2) has a through hole, and the positioning frame (2) is sleeved on the main body (11) of the puncturing head (1) through the through hole, and is located between the first end of the main body (11) and the flange (12); an elastic component (3) is provided between the positioning frame (2) and the flange (12) of the puncturing head (1), and the elastic component (3) is used to apply a force to the positioning frame (2) to make it move in a direction close to the capsule fixing frame (4).

3. The capsule puncturing device according to claim 2, characterized in that: The first end of the main body (11) of the puncturing head (1) is recessed inward to form a concave cavity (111), and the periphery of the cavity opening of the concave cavity (111) forms the puncturing portion (112); The bottom of the concave cavity (111) is provided with the water outlet hole (141) communicating with the water inlet channel (14), the air outlet hole (151) communicating with the air inlet channel (15), and the first water outlet (161) communicating with the water outlet channel (16).

4. The capsule puncturing device according to claim 3, characterized in that: A second drain port (162) communicating with the drain channel (16) is provided on a peripheral wall of the main body (11) near the first end thereof; One end of the positioning frame (2) facing the capsule fixing frame (4) is recessed downward to form an annular cavity surrounding the through hole, and a sealing gasket (21) is provided in the annular cavity; when the capsule fixing frame (4) is pressed in the direction of the positioning frame (2), the outer peripheral edge of the mouth of the capsule (43) is tightly attached to the sealing gasket (21) and encloses a chamber (23), the first end of the main body (11) extends out of the positioning frame (2) and lifts up the sealing cover (431) of the capsule (43), and the second drain port (162) enters the chamber (23).

5. The capsule puncturing device according to claim 4, characterized in that: An annular groove (13) is provided on the outer peripheral wall between the first end of the main body (11) of the puncturing head (1) and the flange (12), and an O-ring (131) is provided in the annular groove (13). The O-ring (131) is used to seal between the hole wall of the through hole and the outer wall of the main body (11).

6. The capsule puncturing device according to claim 2, characterized in that: The air inlet channel (15) extends in a direction from the first end of the main body (11) to the second end thereof, and the first end of the air inlet channel (15) penetrates to the first end of the main body (11) to form an air outlet (151); a control valve (5) is provided in the air inlet channel (15); when the piercing head (1) pierces the capsule (43) and the control component (6) controls the air circuit to supply air to the air inlet channel (15), the control valve (5) opens the air outlet (151) under the action of the gas to allow the gas to enter the capsule (43); when the air circuit stops supplying air, the control valve (5) closes the air outlet (151).

7. The capsule puncturing device according to claim 6, characterized in that: The second end of the air inlet passage (15) is located near the second end of the main body (11), and a side portion of the main body (11) near the second end thereof is provided with an air inlet (152) communicating with the air inlet passage (15); The control valve (5) comprises a first push rod (51), a first reset member (52) and a first sealing ring (53); the first end of the first push rod (51) corresponds to the air outlet (151); the first sealing ring (53) is sleeved on the first push rod (51) near its second end and is away from the first end of the first push rod (51) relative to the air inlet (152); when gas is introduced into the air inlet passage (15), the first push rod (51) can move in a direction away from the air outlet (151) so that the first end thereof opens the air outlet (151); the first reset member (52) acts on the first push rod (51) and is used to exert a force on the first push rod (51) so that the first end thereof moves in a direction close to the air outlet (151) so as to block the air outlet (151).

8. The capsule puncturing device according to claim 1, characterized in that: The control assembly (6) comprises a second push rod (61), a micro switch (62) and a second reset member (63), wherein the micro switch (62) is fixed on the puncturing head (1), and the second push rod (61) is movably arranged on the puncturing head (1) and can move relative to the micro switch (62) to trigger the micro switch (62) or release the triggering of the micro switch (62); when the capsule fixing frame (4) is pressed in the direction of the positioning frame (2), the The positioning frame (2) pushes the second push rod (61) to move and trigger the micro switch (62). When the pressure on the capsule fixing frame (4) is released, the second push rod (61) moves in the opposite direction of the pressure under the action of the second reset member (63) and releases the triggering of the micro switch (62); wherein, when the micro switch (62) is triggered, the water circuit and the air circuit are activated to supply water and air to the water inlet channel (14) and the air inlet channel (15) respectively.

9. The capsule puncturing device according to claim 1, characterized in that: The capsule piercing device further comprises a two-way valve (7) and a three-way valve (8); a first port of the two-way valve (7) is connected to a water outlet (163) of the drainage channel (16), and a second port of the two-way valve (7) is connected to a first port of the three-way valve (8); when the piercing head (1) pierces the capsule (43) after a first preset time, the two-way valve (7) is opened, and the first port of the three-way valve (8) is connected to its second port, and the first port of the three-way valve (8) is opened. The first port (8) of the three-way valve (8) is disconnected from the third port (81) of the three-way valve (8), and the beverage mixed with gas in the capsule (43) is discharged through the second port of the three-way valve (8); after the beverage is discharged, the first port of the three-way valve (8) is disconnected from the second port of the three-way valve (8), and the first port of the three-way valve (8) is connected to the third port (81) of the three-way valve (8), and the residual water and residual gas in the piercing head (1) are discharged through the third port (81) of the three-way valve (8).

10. A coffee machine, characterized in that: The capsule puncturing device comprises the capsule puncturing device according to any one of claims 1 to 9.

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