Locking structure for a coffee machine press powder brewing device, bean grinding pressure coffee machine

Abstract

The utility model discloses a coffee machine and be located in the locking structure for coffee machine powder pressing brewing device in coffee machine, this locking structure includes the locking mechanism in the support side wall, and the locking mechanism includes second hydraulic assembly, and the slider in second hydraulic assembly has initial position and locking position with respect to support, and when the slider is located at the locking position, the slider is connected with the powder pressing mechanism, for limiting the powder pressing mould module and returning the initial position, the utility model discloses the recovery limiting of the powder pressing mechanism in the powder pressing position, guarantees its stability in the powder pressing position.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, specifically to a locking structure for a coffee machine tamping and brewing device and a coffee grinder pressure coffee machine. Background Technology

[0002] Most coffee machines on the market currently use manual tamping with a tamping hammer. This process is extremely cumbersome, and due to individual differences, consumers may apply uneven tamping pressure, directly affecting the extraction of coffee during brewing and thus severely impacting the taste. Choosing a dedicated tamping machine undoubtedly increases equipment costs, and its large size makes it unsuitable for both limited space in home kitchens and the space-efficient needs of commercial shops. Fully automatic coffee machines typically use a motor-driven screw mechanism for tamping. This complex design not only occupies a significant amount of internal space, resulting in a bulky machine, but also incurs high manufacturing and maintenance costs.

[0003] To address these issues, existing patents have disclosed coffee machines that utilize automatic tamping components for tamping. For example, patent CN 219166179 U discloses an automatic tamping device for coffee beans. This solution achieves automatic tamping by hydraulically driving the tamping hammer. However, in this solution, after the tamping hammer tamps the coffee beans for brewing, if the tamping pressure is insufficient, the tamping hammer is prone to rebounding, resulting in unstable tamping and affecting the tamping effect.

[0004] The aforementioned shortcomings deserve improvement. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a locking structure for the coffee tamping and brewing device of a coffee machine and a coffee grinder, which ensures the stability of the tamping mechanism in the tamping position by restoring and limiting the tamping mechanism.

[0006] The technical solution of this utility model is as follows:

[0007] A locking structure for a coffee machine's tamping and brewing device, characterized in that the coffee machine's support frame is provided with:

[0008] A powder pressing mechanism is connected to a first hydraulic component, and the powder pressing mechanism has an initial position and a powder pressing position relative to the support.

[0009] A locking mechanism located on the side wall of the support includes a second hydraulic assembly. The slider in the second hydraulic assembly has an initial position and a locked position relative to the support. When the slider is in the locked position, the slider engages with the powder pressing mechanism to prevent the powder pressing module from returning to the initial position.

[0010] According to the above-described solution, the present utility model is characterized in that the first hydraulic component comprises:

[0011] The first hydraulic cavity has a first hydraulic chamber inside, and the first hydraulic chamber is connected to the first hydraulic inlet;

[0012] A piston, the lower end of which is connected to the powder pressing mechanism, and the upper end of which is located in the first hydraulic chamber and sealed to the inner wall of the first hydraulic chamber;

[0013] A first hydraulic reset element is connected to the piston or the powder pressing mechanism and is used to drive the piston or the powder pressing mechanism to reset to the initial state.

[0014] Furthermore, the first hydraulic reset element includes a guide rod and a first hydraulic reset spring. The guide rod is disposed on the bracket, and the first hydraulic reset spring is sleeved on the guide rod. The first hydraulic reset spring is connected to the powder pressing mechanism and the bracket.

[0015] Furthermore, the first hydraulic component also includes a first micro switch, which contacts the powder pressing mechanism in the powder pressing position.

[0016] According to the above-described solution, the present utility model is characterized in that the second hydraulic component comprises:

[0017] The second hydraulic cavity has a second hydraulic chamber inside, and the second hydraulic chamber is connected to the second hydraulic inlet;

[0018] A slider, located within the second hydraulic chamber, is capable of reciprocating between an initial position and a locked position within the second hydraulic chamber;

[0019] The second hydraulic reset element is used to drive the slider to reset from the locked position to the initial position;

[0020] A second micro switch is located near the second hydraulic cavity, such that the second micro switch is activated when the slider is in the locked position.

[0021] Furthermore, the support is provided with a powder feeding cavity, and the powder feeding cavity is provided with a powder channel. The powder channel has an extended position and a retracted position relative to the powder feeding cavity. When the powder channel is in the extended position, its lower end is located in the powder pressing cavity at the bottom of the support.

[0022] Furthermore, the powder feeding cavity is provided with a powder channel limiting part on its inner side, and a convex ring matching the powder channel limiting part is provided on the periphery of the powder channel, so that when the powder channel is in the extended position, the convex ring is limited and connected to the powder channel limiting part.

[0023] Furthermore, the lower end of the powder channel is provided with a powder channel slope, which is used to contact the lower side of the powder pressing mechanism and provide a surface for relative movement with the powder pressing mechanism.

[0024] Furthermore, the powder feeding cavity is provided with a powder channel reset element, which is used to drive the powder channel to reset from the contracted position to the extended position.

[0025] On the other hand, a coffee maker with a grinding and pressing mechanism includes a body, wherein a support position is provided on the body, characterized in that the support position is equipped with the aforementioned locking structure for the coffee maker's tamping and brewing device.

[0026] According to the above-described solution, the beneficial effect of this utility model is that the powder pressing mechanism is driven by the first hydraulic component to achieve automatic powder pressing, and the gold crushing mechanism is driven by the second hydraulic component to achieve automatic locking, so as to prevent the powder pressing mechanism from disengaging from the powder pressing position and ensure the stability of the powder pressing state.

[0027] In this invention, both the powder pressing mechanism and the locking mechanism are driven by hydraulic means. On the one hand, this enables automatic drive control, and on the other hand, it reduces the space consumption caused by mechanical control structures, ensuring its application in small coffee machines. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the automatic powder pressing and brewing device in this utility model;

[0030] Figure 3 This is a schematic diagram from another perspective of the automatic powder pressing and brewing device of this utility model;

[0031] Figure 4 This is a top view of the automatic powder pressing and brewing device of this utility model;

[0032] Figure 5 This refers to the powder pressing device of this utility model when it is in the first position. Figure 4 AA-direction cross section;

[0033] Figure 6 When the medium-pressure powder device of this utility model is in the second position, it corresponds to Figure 4 AA-direction cross section;

[0034] Figure 7 When the slider is in the first position in this utility model Figure 4 BB-direction cross-section;

[0035] Figure 8When the slider is in the second position in this utility model Figure 4 BB-direction cross-section;

[0036] Figure 9 for Figure 8 Cross-sectional view along the CC direction;

[0037] Figure 10 This is an exploded view showing the positional relationship between the bracket and the slider in this utility model;

[0038] Figure 11 This is an exploded view of the positional relationship between the bracket and the slider in this utility model from another perspective;

[0039] Figure 12 This is a schematic diagram of the water circuit layout of the coffee machine in this utility model.

[0040] In the diagram, the labels for each item are as follows:

[0041] 100. Automatic powder pressing and brewing device; 110. Support frame; 111. Powder pressing section; 1111. Powder pressing chamber; 112. Funnel support; 113. Powder feeding chamber; 1131. Powder channel limiting part; 1132. Powder channel return spring; 114. Sliding groove;

[0042] 120. First hydraulic cavity; 121. First hydraulic chamber; 122. First hydraulic inlet;

[0043] 130. Piston;

[0044] 140. Powder pressing mechanism; 141. Brewing head; 142. Brewing water inlet; 143. Guide rod; 144. First hydraulic return spring;

[0045] 150. Powder run; 151. Convex ring;

[0046] 160. First micro switch;

[0047] 170. Second micro switch; 171. Slide rod; 172. Micro switch return spring;

[0048] 180. Second hydraulic cavity; 181. Second hydraulic chamber; 182. Second hydraulic inlet; 183. Slider; 1831. Protrusion; 1832. Locking part; 184. Second hydraulic return spring;

[0049] 200. Grinding mechanism; 210. Powder outlet;

[0050] 300. Funnel. Detailed Implementation

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0052] like Figures 1 to 12 As shown, in order to solve the defect of existing coffee machines where the tamping structure is unstable after tamping, affecting the brewing effect, this utility model proposes a coffee grinder pressure coffee machine. The coffee machine is equipped with a locking structure for the coffee machine tamping and brewing device. This structure ensures the stability of the tamping mechanism in the tamping position by limiting its return.

[0053] The coffee grinder / pressure coffee machine includes a body with a support position. A grinding mechanism 200 and an automatic tamping and brewing device 100 for tamping and brewing coffee powder are installed on the support position. The machine body also includes a water tank, a control system, and a water circuit structure, which includes a water tank, a drip tray, a hydraulic valve for pressure detection, and valves for water flow control, etc.

[0054] The lower end of the automatic tamping and brewing device 100 is connected to the funnel 300, and the funnel 300 is connected to the tamping chamber of the automatic tamping and brewing device 100, forming a complete tamping and brewing chamber. Preferably, the funnel 300 is detachably connected to the funnel support 112 at the lower end of the automatic tamping and brewing device 100, which facilitates cleaning of the funnel 300 and makes it easy to discard brewed coffee powder.

[0055] The automatic tamping and brewing device 100 of this utility model is provided with a locking structure for the coffee machine tamping and brewing device, which includes a bracket 110. The automatic tamping and brewing device 100 is installed on the support position of the coffee machine through the bracket 110, and the bracket 110 also serves as a supporting foundation for the other structures of the automatic tamping and brewing device 100. Figures 1 to 3 , Figure 10 , Figure 11 As shown, in the bracket 100 of this utility model, the upper part is used to install the first hydraulic component, the lower part of the bracket 110 is used to provide space for the tamping mechanism 140 to move up and down, and to provide space for coffee powder to fall into; the bottom of the bracket 110 forms a funnel bracket 112 for connecting with the funnel 300.

[0056] A powder pressing mechanism 140 is mounted on a support 110. A powder pressing chamber 1111 is located at the bottom of the support 110. The powder pressing mechanism has an initial position and a powder pressing position relative to the support. The powder pressing mechanism 140 is connected to a first hydraulic component, which drives the powder pressing mechanism 140 to press powder and return to its original position. A powder pressing section 111 is located at the lower part of the support 110. The powder pressing chamber 1111 is located within the powder pressing section 111, and the lower end of the powder pressing mechanism 140 is sealed to the inner wall of the powder pressing chamber 1111. The powder pressing chamber 1111 provides space for powder pressing, and its sealed connection with the powder pressing mechanism 140 enables high-pressure brewing. The tamping mechanism 140 has a brewing head 141 on the side facing the tamping chamber 1111. The brewing head 141 has a brewing water inlet 142 that communicates with the tamping chamber 1111. This utility model integrates the brewing water inlet 142 into the tamping mechanism 140, which can make it perform both tamping and brewing functions, greatly saving the internal space of the coffee machine.

[0057] Specifically, the first hydraulic assembly includes a first hydraulic cavity 120, a piston 130, and a first hydraulic reset element. The first hydraulic cavity 120 has a first hydraulic chamber 121 inside, and the first hydraulic chamber 121 is connected to a first hydraulic inlet 122, so that water enters the first hydraulic chamber 121 through the first hydraulic inlet 122 and increases the pressure of the first hydraulic chamber 121. The lower end of the piston 130 is connected to the powder pressing mechanism 140, and its upper end is located in the first hydraulic chamber 121 and is sealed to the inner wall of the first hydraulic chamber 121. The piston 130 and the first hydraulic cavity 120 cooperate with each other to realize the effect of hydraulically controlling the extension and retraction of the piston, thereby driving the powder pressing mechanism 140 to move up and down. The first hydraulic reset element is connected to the piston 130 or the powder pressing mechanism 140 and is used to drive the piston 130 or the powder pressing mechanism 140 to reset to the initial state.

[0058] In this invention, the first hydraulic reset element includes a guide rod 143 and a first hydraulic reset spring 144. The guide rod 143 is mounted on the bracket 110, and the first hydraulic reset spring 144 is sleeved on the guide rod 143. The first hydraulic reset spring 144 connects the powder pressing mechanism 140 and the bracket 110. When the hydraulic pressure in the first hydraulic chamber 1111 is insufficient to support the piston 130, the elastic force of the first hydraulic reset spring 144 drives the powder pressing mechanism 140 to reset. Preferably, the first hydraulic reset elements are evenly distributed around the bracket 110, which can ensure that the powder pressing mechanism 140 is subjected to more uniform force and the reset action is more balanced.

[0059] The first hydraulic component also includes a first micro switch 160, which contacts the powder pressing mechanism 140 in the powder pressing position. The first micro switch 160 is used to detect whether the powder pressing mechanism 140 has reached the powder pressing position and uses this as a trigger signal for subsequent control processes.

[0060] To prevent the powder pressing mechanism from becoming unstable at the pressing position, the bracket 110 of this utility model is also equipped with a locking mechanism. The locking mechanism includes a second hydraulic component, which is used to limit the powder pressing mechanism 140 to prevent the powder pressing mechanism 140 from leaking water due to excessive reaction force generated by the brewing pressure during the brewing process, thus ensuring the brewing effect.

[0061] In this invention, the second hydraulic assembly includes a second hydraulic cavity 180, a slider 183, and a second hydraulic reset element. The second hydraulic cavity 180 has a second hydraulic chamber 181, which is connected to a second hydraulic inlet 182, so that water enters the second hydraulic chamber 181 through the second hydraulic inlet 182, increasing the pressure of the second hydraulic chamber 181. The slider 183 is located in the second hydraulic chamber 182 and can reciprocate between the initial position and the locked position along the second hydraulic chamber 182. When the slider 183 is in the locked position, it is engaged with the powder pressing mechanism 140. The second hydraulic reset element is used to drive the slider 183 to reset from the locked position to the initial position.

[0062] Preferably, the front end of the slider 183 is provided with a locking part 1832, and the bracket 110 is provided with a sliding groove 114 for providing sliding space for the locking part 1832. After the slider 183 moves, the locking part 1832 can extend into the bracket 110 and extend to the upper side of the powder pressing mechanism 140, thereby forming a limit on the powder pressing mechanism 140; the sliding groove 114 not only provides space for the locking part 1832 to slide, but also supports the locking part 1832 to ensure the locking effect of the locking part 1832 on the powder pressing mechanism 140.

[0063] Preferably, the second hydraulic reset element is a second hydraulic reset spring 184. The second hydraulic reset spring 184 is located on the side of the slider 183 near the powder pressing mechanism 140, so that when the slider 183 moves under liquid pressure, the second hydraulic reset spring 184 is compressed and provides a reset force for the slider 183. The second hydraulic reset spring 184 is distributed on the upper and lower sides of the locking part 1832 to ensure that the force on the slider 183 is more uniform when it resets.

[0064] The second hydraulic assembly also includes a second micro switch 170, which is used to detect whether the slider 183 has moved to the locked position and to provide a trigger signal for subsequent actions. The second micro switch 170 is located near the second hydraulic chamber 180, so that the second micro switch 170 is activated when the slider 183 is in the locked position.

[0065] The second microswitch 170 includes a slide rod 171 and a microswitch reset spring 172. The front end of the slide rod 171 faces the slider 183, and its rear end is connected to the microswitch reset spring 172. When the slide rod 171 is acted upon by the slider 183, it retracts. At this time, the microswitch reset spring 172 retracts and stores force, providing a reset force for the slide rod 171. Preferably, the front end of the slider 183 is provided with a protrusion 1831, which is used to contact the front end of the slide rod 171. The protrusion 1831 extends the surface of the slider 183, ensuring that it does not affect the sliding of the slider while guaranteeing that the slide rod receives an accurate triggering force.

[0066] To achieve fully automated coffee brewing, the automatic tamping and brewing device 100 of this invention is also connected to the grinding mechanism 200. Specifically, the support 110 is provided with a powder feeding chamber 113, and the powder outlet 210 of the grinding mechanism 200 is connected to the powder feeding chamber 113 of the automatic tamping and brewing device 100. Preferably, the powder outlet 210 extends into the powder feeding chamber 113, which ensures that the coffee powder from the outlet 210 can fall into the automatic tamping and brewing device 100 through the powder feeding chamber 113, avoiding coffee powder residue in the powder feeding chamber 130, ensuring the cleanliness of the coffee machine, and also ensuring that the coffee powder falls into the center of the tamping chamber 1111, making the coffee powder distribution more even.

[0067] Specifically, the powder feeding cavity 113 is provided with a reciprocating powder channel 150. The powder channel 150 has an extended position and a retracted position relative to the powder feeding cavity 113. When the powder channel 150 is in the extended position, its lower end is located in the powder pressing chamber 1111. When the powder channel 150 is in the retracted position, its lower end is disengaged from the powder pressing chamber 1111, providing movement space for the powder pressing mechanism 140. Preferably, the upper side of the lower end of the powder channel 150 is provided with a powder channel slope. The powder channel slope is used to contact the lower side of the powder pressing mechanism 140 and provide a surface for relative movement with the powder pressing mechanism 140. Through this structural design, when the powder pressing mechanism 140 moves downward to the position of the powder channel slope, it can push the powder channel to retract, providing space for the movement of the powder pressing mechanism 140 and avoiding mutual interference between the powder channel 150 and the powder pressing mechanism 140.

[0068] like Figures 4 to 6 As shown, the powder feeding cavity 113 has a powder channel limiting part 1131 on its inner side, and the powder channel 150 has a convex ring 151 that matches the powder channel limiting part 1131 on its outer periphery, so that when the powder channel 150 is in the extended position, the convex ring 151 and the powder channel limiting part 1131 are limited and connected. The powder channel limiting part 1131 and the convex ring 151 cooperate with each other to prevent the powder channel 150 from falling out of the powder feeding cavity 113. In addition, the convex ring 151 also provides a support surface for the powder channel reset element.

[0069] The powder feeding chamber 1111 is equipped with a powder channel reset element, which is used to drive the powder channel 150 from the contracted position to the extended position. Preferably, the powder channel reset element is a powder channel reset spring 1132, whose two ends are respectively connected to the powder feeding chamber 113 and the powder channel 150, so that when the powder pressing mechanism 140 pushes the powder channel 150 to contract, the powder channel reset spring 1132 contracts and stores force, and provides the force for the powder channel 150 to extend.

[0070] An automatic tamping and brewing method, applied to the aforementioned coffee grinder / pressure machine, includes the following steps:

[0071] 1. Preparation

[0072] At the beginning, all components are in their initial positions. The funnel 300 is installed on the funnel support 112 of the automatic powder pressing and brewing device 100, so that the funnel space and the powder pressing chamber are integrated.

[0073] 2. Grinding

[0074] The grinding component grinds the coffee powder, causing it to fall into the tamping chamber 1111 through the powder channel 150 in the automatic tamping brewing device 100. Since the lower end of the powder channel 150 initially extends into the tamping chamber 1111, all the coffee powder ground by the grinding component falls into the center of the tamping chamber. This avoids coffee powder residue in the powder channel and ensures a more balanced distribution of coffee powder within the tamping chamber, thus guaranteeing better brewing results.

[0075] 3. Pressing powder

[0076] Water is controlled to flow into the first hydraulic chamber 121 of the automatic tamping and brewing device 100. The hydraulic pressure in the first hydraulic chamber 121 increases, and the tamping mechanism 140 moves under the influence of the hydraulic pressure in the first hydraulic chamber 121, gradually tamping the coffee powder located in the tamping chamber 11111.

[0077] During the downward movement of the powder pressing mechanism 140, when its bottom contacts the inclined surface of the powder channel, the inclined surface guides the powder channel 150 to contract until the powder channel 150 disengages from the powder pressing chamber 1111. During the movement of the powder channel 150, the powder channel return spring 1132 gradually stores force, providing the force for the powder channel 150 to return to its original position.

[0078] 4. Pressing and locking the powder

[0079] After the powder pressing mechanism 140 moves into place, the water flow is controlled to enter the second hydraulic chamber 181 of the automatic powder pressing and brewing device 100. The hydraulic pressure in the second hydraulic chamber 181 gradually increases, and the slider 183 moves under the drive of the hydraulic pressure in the second hydraulic chamber 181, and locks and limits the powder pressing mechanism 140.

[0080] Specifically, during the movement of slider 183, the locking part 1832 on the inner side of slider 183 slides inward along the sliding groove 114 on bracket 110 until it extends into the bracket 110 and engages with the top of powder pressing mechanism 140, so that powder pressing mechanism 140 will not disengage from this position under the limiting action of locking part 1832. When slider 183 moves into position, the protrusion 1831 on the inner side of slider 183 contacts the slide rod 171 of second micro switch 17 and pushes slide rod 171 to move, providing a signal that slider 183 has moved into position. During the movement of slide rod 171, micro switch reset spring 172 gradually stores force to provide the reset force for slide rod 171.

[0081] 5. Brewing

[0082] The water flow is controlled to enter the powder pressing chamber 1111 through the brewing inlet 142 and brew.

[0083] During this process, the brewing head 141 is equipped with multiple water outlet channels, and the water flowing in through the brewing inlet 142 can evenly reach the space of the tamping chamber 1111, ensuring a more uniform brewing effect and a better taste for the coffee powder.

[0084] 6. Reset

[0085] After brewing, the slider 183 is reset under the action of the second hydraulic reset element, and then the powder pressing mechanism 140 is reset under the action of the first hydraulic reset element, thus completing the grinding, pressing and brewing process of the beans.

[0086] Specifically: (1) After brewing, the brewing inlet 142 no longer receives water. (2) Subsequently, the second hydraulic chamber 181 is depressurized, and under the action of the second hydraulic return spring 184, the slider 173 gradually moves outward, causing the locking part 1832 to disengage from the powder pressing mechanism 140; at the same time, the micro switch return spring 172 in the second micro switch 170 acts on the slide rod 171, causing the slide rod 171 to reset; (3) When the slider 183 is removed from the limit position, the first hydraulic chamber 121 is depressurized, and the first hydraulic return spring 144 drives the powder pressing mechanism 140 to gradually reset to the original position; during this process, after the powder pressing mechanism 140 disengages from the powder channel 150, the powder channel 150 resets to the original position under the action of the powder channel return spring 1132.

[0087] The above process illustrates the movement of various components of the automatic tamping and brewing device in a coffee press machine during the grinding, tamping, and brewing processes. Water flow control is also a crucial element throughout the entire process.

[0088] In this utility model, the water circuit layout includes a main brewing circuit and a hydraulic circuit.

[0089] In the main brewing circuit, the water tank outlet is sequentially connected to a flow meter, a water pump, a three-way valve with a check valve, a boiler, and the inlet 2 of the three-way solenoid valve B. The first outlet 1 of the three-way solenoid valve B, after passing through a pressure gauge, is connected to the brewing head, where the brewed coffee powder flows into the cup. The second outlet 3 of the three-way solenoid valve B, through a hydraulic chamber, is connected to a drip tray for treating wastewater from the brewing head. Ends 1 and 3 of the three-way solenoid valve B are normally open channels, while ends 1 and 2 are normally closed channels.

[0090] In the hydraulic circuit, the other outlet of the three-way valve with a check valve is connected to the inlet 2 of the three-way solenoid valve A. The first outlet 1 of the three-way solenoid valve A is connected to one end of the three-way two-way valve, and the other end of the three-way two-way valve is connected to the first hydraulic port for driving the powder pressing mechanism. The third end of the three-way two-way valve is connected to the second hydraulic port through a two-way solenoid valve for driving the slider. The second outlet 3 of the three-way solenoid valve A is connected to the inlet of the water tank for reflux of the liquid in the first and second hydraulic chambers.

[0091] Preferably, a protective valve is also provided between the water pump and the three-way valve with a check valve.

[0092] In this invention, both the first and second hydraulic chambers can use the same water source as the brewing head, which saves space in the coffee machine's water circuit layout and reduces water consumption. Furthermore, through the coordination of the main circuit and the loop, fully automatic tamping and brewing operations are achieved.

[0093] Based on the above water circuit layout, this utility model, combined with the above-mentioned grinding, pressing, and brewing processes, can achieve fully automatic control of the water circuit:

[0094] 1. Initial state

[0095] The entire machine is in a non-started state. Three-way solenoid valves A and B are de-energized, and both two-way solenoid valves are de-energized. At this time, the first hydraulic chamber and the second hydraulic chamber are disconnected from the external water circuit, the water pump is not working, and the water in the water tank is still.

[0096] 2. Grinding stage

[0097] The grinding mechanism starts grinding coffee beans. At this stage, the water circuit is not activated, all solenoid valves remain closed, and there is no water flow.

[0098] 3. Powder pressing stage

[0099] After grinding is completed, the water pump receives a signal and begins supplying water. The three-way solenoid valve A is energized, and its terminals 1 and 2 are open. At this time, water in the tank enters the first hydraulic chamber under the action of the water pump. The water entering the first hydraulic chamber pushes the piston, causing the powder pressing mechanism to move downwards to press the powder. During this process, the powder channel retracts under pressure and returns to the powder chamber.

[0100] 4. Locking and pressing mechanism stage

[0101] The downward movement of the powder pressing mechanism triggers the first micro switch, opening the double-way solenoid valve. At this time, water from the water tank enters the second hydraulic chamber under the action of the water pump, pushing the slider towards the powder pressing mechanism. When the protrusion on the slider touches the second micro switch, both the double-way solenoid valve and the three-way solenoid valve A are de-energized.

[0102] 5. Brewing stage

[0103] When the two-way solenoid valve and the three-way solenoid valve A are de-energized, the three-way solenoid valve B is energized, and its terminals 1 and 2 are connected. Water is heated by the boiler under the action of the water pump and then brewed through the brewing head.

[0104] 6. Conclusion

[0105] After brewing, the two-way solenoid valve is energized, and the three-way solenoid valve B is de-energized: the water in the first hydraulic chamber and the water in the second hydraulic chamber flow back under the pressure of their respective reset elements, and then flow back to the water tank through the three-way solenoid valve A; the wastewater in the brewing head flows to the wastewater tray through the pressure relief chamber. The powder channel extends under the action of the powder channel reset spring, and the water circuit returns to its initial disconnected state, waiting for the next working command.

[0106] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0107] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. A locking structure for a coffee machine tamping and brewing device, characterized in that, The coffee machine stand has: A powder pressing mechanism is connected to a first hydraulic component, and the powder pressing mechanism has an initial position and a powder pressing position relative to the support. A locking mechanism located on the side wall of the support includes a second hydraulic assembly. The slider in the second hydraulic assembly has an initial position and a locked position relative to the support. When the slider is in the locked position, the slider engages with the powder pressing mechanism to prevent the powder pressing module from returning to the initial position.

2. The locking structure for a coffee machine tamping and brewing device according to claim 1, characterized in that, The first hydraulic assembly includes: The first hydraulic cavity has a first hydraulic chamber inside, and the first hydraulic chamber is connected to the first hydraulic inlet; A piston, the lower end of which is connected to the powder pressing mechanism, and the upper end of which is located in the first hydraulic chamber and sealed to the inner wall of the first hydraulic chamber; A first hydraulic reset element is connected to the piston or the powder pressing mechanism and is used to drive the piston or the powder pressing mechanism to reset to the initial state.

3. The locking structure for a coffee machine tamping and brewing device according to claim 2, characterized in that, The first hydraulic reset element includes a guide rod and a first hydraulic reset spring. The guide rod is disposed on the bracket, and the first hydraulic reset spring is sleeved on the guide rod. The first hydraulic reset spring is connected to the powder pressing mechanism and the bracket.

4. The locking structure for a coffee machine tamping and brewing device according to claim 2, characterized in that, The first hydraulic component also includes a first micro switch, which contacts the powder pressing mechanism in the powder pressing position.

5. The locking structure for a coffee machine tamping and brewing device according to claim 1, characterized in that, The second hydraulic assembly includes: The second hydraulic cavity has a second hydraulic chamber inside, and the second hydraulic chamber is connected to the second hydraulic inlet; A slider, located within the second hydraulic chamber, is capable of reciprocating between an initial position and a locked position within the second hydraulic chamber; The second hydraulic reset element is used to drive the slider to reset from the locked position to the initial position; A second micro switch is located near the second hydraulic cavity, such that the second micro switch is activated when the slider is in the locked position.

6. The locking structure for a coffee machine tamping and brewing device according to claim 5, characterized in that, The support is provided with a powder feeding cavity, and the powder feeding cavity is provided with a powder channel. The powder channel has an extended position and a retracted position relative to the powder feeding cavity. When the powder channel is in the extended position, its lower end is located in the powder pressing cavity at the bottom of the support.

7. The locking structure for a coffee machine tamping and brewing device according to claim 5, characterized in that, The powder feeding cavity is provided with a powder channel limiting part on its inner side, and a convex ring matching the powder channel limiting part is provided on the periphery of the powder channel, so that when the powder channel is in the extended position, the convex ring is limited and connected to the powder channel limiting part.

8. The locking structure for a coffee machine tamping and brewing device according to claim 5, characterized in that, The lower end of the powder channel is provided with a powder channel slope, which is used to contact the lower side of the powder pressing mechanism and provide a surface for relative movement with the powder pressing mechanism.

9. The locking structure for a coffee machine tamping and brewing device according to claim 5, characterized in that, The powder feeding cavity is equipped with a powder channel reset element, which is used to drive the powder channel to reset from the contracted position to the extended position.

10. A coffee grinder / pressure coffee machine, comprising a body, wherein the body is provided with a support position, characterized in that, The bearing position is equipped with a locking structure for a coffee machine tamping and brewing device as described in any one of claims 1-9.

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