Coffee machine capable of realizing multi-stage pressure regulation
By introducing a multi-stage pressure regulating device into the coffee machine, and using protection valves and rotary switches to achieve multi-stage pressure regulating, the problem that existing coffee machines cannot adjust the pressure is solved, improving the adjustment flexibility and taste of the coffee machine, and reducing costs.
Patent Information
- Application Number
- CN202422283700.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing automatic coffee machine cannot adjust the brewing and extraction pressure according to the origin and roasting depth of different coffee beans, resulting in poor brewing taste, and the existing adjustment methods are complex and costly.
The multi-stage pressure regulating coffee machine is designed, and by connecting protective valves and rotary switches with different pressure relief thresholds on the main conveying pipeline, multi-stage adjustment of the brewing extraction pressure is achieved. The steering valve and rotary switch are used to control pressure changes, simplifying the structure and reducing costs.
It realizes the adjustment of various brewing and extraction pressures on a coffee machine. It has a simple structure, low cost and accurate control, which enhances the brewing taste of the coffee.
Smart Images
Figure CN223126298U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coffee machines, and particularly relates to a coffee machine capable of multi-stage pressure regulation. Background Technique
[0002] There are many coffee machines on the market that can automatically brew coffee. Just by simply clicking the start button, the coffee machine can grind the coffee beans and perform brewing extraction according to a fixed program, and then easily obtain a cup of coffee. Generally, such automatic coffee machines are only set with a single brewing extraction pressure and cannot adjust the pressure. However, for coffee beans from different origins and with different roasting depths, it is generally necessary to adjust the brewing extraction pressure as needed. Therefore, such automatic coffee machines on the market can no longer meet people's usage requirements.
[0003] Through technical improvement, people have developed coffee machines with adjustable brewing extraction pressure. The method of adjusting the pressure is to control the flow rate of the water pump to adjust the output pressure. However, on the one hand, this control method requires a dedicated control circuit to control the water pump and a customized water pump with adjustable speed, which not only has complex control but also high product cost; on the other hand, the pressure of brewing extraction cannot be stably controlled by adjusting the flow rate of the water pump, which will affect the brewing taste of coffee and there is still a gap from people's expectations. Content of the Utility Model
[0004] The purpose of the present utility model is to solve the above problems and provide a coffee machine capable of multi-stage pressure regulation, which includes a water pump, a heating device, and a brewing device. The water pump is connected to the water inlet of the heating device, and the water outlet of the heating device is connected to the brewing device. The water pump can transport water to the heating device, and the water heated by the heating device can flow to the brewing device. It also includes a one-way valve and a pressure regulating device. The one-way valve is arranged between the water pump and the heating device. A main delivery pipeline is connected between the one-way valve and the heating device. A first branch pipeline is connected to the main delivery pipeline, and the pressure regulating device is connected to the first branch pipeline. The pressure regulating device includes at least two protection valves with different pressure relief thresholds. Each of the protection valves is also respectively connected to a branch valve pipeline. The pressure regulating device further includes a steering valve, which includes a common interface connected to the first branch pipeline, branch interfaces respectively connected to each branch valve pipeline, and a rotary switch. By rotating the rotary switch, the common interface can be closed or opened. When the common interface is in the closed state, the protection valve connected to the first branch pipeline is disconnected. When the common interface is in the open state, the first branch pipeline can be connected to at least one of the branch valve pipelines through the steering valve. The pressure of the main delivery pipeline is determined by the protection valve with the smallest pressure relief threshold among several protection valves connected by the first branch pipeline. It also includes a safety valve and a second branch pipeline. The second branch pipeline is connected to the main delivery pipeline, and the safety valve is connected to the second branch pipeline and remains in a connected state. The pressure relief threshold of the safety valve is greater than the pressure relief threshold of the protection valve.
[0005] Preferably, each of the protection valves is connected to the steering valve in the order of the size of the pressure relief threshold. When the common interface is open and the rotary switch is in the starting position, the first branch pipeline can be connected to all the branch valve pipelines through the steering valve. When the rotary switch is rotated forward, the branch interfaces can be sequentially and continuously closed in the order of increasing pressure relief threshold, thereby controlling the pressure of the main delivery pipeline to change from small to large in turn. When the rotary switch is rotated to the end position, the branch valve pipeline corresponding to the protection valve with the largest pressure relief threshold is connected to the first branch pipeline. When the rotary switch is rotated backward, the pressure of the main delivery pipeline can be controlled to change from large to small in turn. When the common interface is closed by the rotary switch, the pressure of the main delivery pipeline is determined by the threshold of the safety valve connected to the second branch pipeline.
[0006] Preferably, a valve core channel is provided on the rotary switch. By rotating the rotary switch, the common interface can be closed or the common interface can be connected to any one of the branch pipe interfaces through the valve core channel; when the valve core channel connects the common interface to any one of the branch pipe interfaces, the pressure of the main delivery pipeline is determined by the threshold value of the connected protection valve. When the common interface is closed by the rotary switch, the pressure of the main delivery pipeline is determined by the threshold value of the safety valve connected to the second branch pipeline.
[0007] Preferably, it further includes a third branch pipeline and a steam generating device. The second branch pipeline is connected to the main delivery pipeline, the steam generating device is connected to the third branch pipeline, and it further includes a first solenoid valve. The first solenoid valve is connected to the third branch pipeline between the main delivery pipeline and the steam generating device, and the first solenoid valve can control the opening and closing of the third branch pipeline.
[0008] Preferably, it further includes a second solenoid valve. The second solenoid valve is connected to the third branch pipeline downstream of the steam generating device, and the second solenoid valve can control the opening and closing of the third branch pipeline.
[0009] Preferably, it further includes a controller. The water pump, heating device, first solenoid valve and second solenoid valve are signal-connected to the controller, and the controller can control the opening or closing of the water pump, heating device, first solenoid valve and second solenoid valve.
[0010] Preferably, it further includes a four-way valve. The four-way valve includes a first valve port, a second valve port, a third valve port and a fourth valve port. The four-way valve is arranged on the main delivery pipeline. The first valve port is used to connect the water pump, the second valve port is used to connect the first branch pipeline, the third valve port is used to connect the main delivery pipeline, and the fourth valve port is used to connect the third branch pipeline.
[0011] Preferably, it further includes a third solenoid valve. The third solenoid valve is connected to the connecting pipeline between the heating device and the brewing device, and the third solenoid valve can control the opening and closing of the connecting pipeline between the heating device and the brewing device.
[0012] Preferably, it further includes a three-way valve and a pressure display. Two of the valve ports of the three-way valve are respectively connected to the water pump and the check valve, and the pressure display is connected to the third valve port of the three-way valve. The pressure display is used to display the pressure in the delivery pipeline.
[0013] Preferably, it further includes a water tank. The water tank is used to store water, and the water pump is connected to the water tank and can pump water from the water tank.
[0014] The present utility model has the following advantages:
[0015] First, by connecting the pressure regulating device to the main pipeline, the pressure regulating device includes at least two protection valves with different pressure relief thresholds. By selecting the protection valve corresponding to the pressure relief threshold, the pressure of the main pipeline can be controlled, so that multiple brewing and extraction pressures can be achieved on one coffee machine, which is very convenient.
[0016] Second, the technical solution of the present invention only needs to add multiple protection valves with different pressure relief thresholds and a rotary switch to achieve multi-stage pressure regulation, without adding expensive control circuits and adjustable-speed water pumps. The overall structure is simple, the cost is low, and the performance is reliable.
[0017] Third, when adjusting the pressure, generally a single channel is used to connect the common interface and the corresponding branch interface. This connection of interface to interface has little problem when the number of branch interfaces is small and can still ensure the accuracy of control. However, if the number of pressure levels to be set is large, the sealing area between the branch interfaces is limited, and the connection method through a single channel is obviously not applicable. The present invention controls by rotating the rotary switch to sequentially close the branch interfaces in ascending order of the pressure relief threshold. Only one set of sealing structure is needed to completely seal the unused branch interfaces, while the branch interfaces corresponding to the pressure relief thresholds to be used and other branch interfaces corresponding to larger pressure relief thresholds are all kept connected. This control method has a simpler sealed connection structure and is suitable for structures with less sealed space. Description of the Drawings
[0018] Figure 1 It is a water circuit schematic diagram of the coffee machine capable of multi-stage pressure regulation, showing the first control method.
[0019] Figure 2 It is a water circuit schematic diagram of the coffee machine capable of multi-stage pressure regulation, showing the second control method. Detailed Embodiment
[0020] The following further describes the present utility model with reference to the drawings.
[0021] Such as Figure 1 And Figure 2As shown in the figure, the present invention provides a coffee machine capable of multi-stage pressure regulation, which includes a water tank 1, a water pump 2, a heating device 3 and a brewing device 4. The water tank 1 is used to store water; one end of the water pump 2 is connected to the water tank 1 and can pump water from the water tank 1. The other end of the water pump 2 is connected to the water inlet of the heating device 3, and the water outlet of the heating device 3 is connected to the brewing device 4. The water pump 2 can transport water to the heating device 3, and the water heated by the heating device 3 can flow to the brewing device 4; it also includes a one-way valve 5 and a pressure regulating device 6. The one-way valve 5 is arranged between the water pump 2 and the heating device 3. A main delivery pipeline 100 is connected between the one-way valve 5 and the heating device 3. A first branch pipeline 101 is connected to the main delivery pipeline 100, and the pressure regulating device 6 is connected to the first branch pipeline 101. The pressure regulating device 6 includes at least two protection valves 61 with different pressure relief thresholds. Each protection valve 61 is also connected to a branch valve pipeline 62 respectively. The pressure regulating device 6 also includes a steering valve 63. The steering valve 63 includes a common interface 631 connected to the first branch pipeline 101, branch interfaces 632 respectively connected to each branch valve pipeline 62 and a rotary switch 633. By rotating the rotary switch 633, the common interface 631 can be closed or opened. When the common interface 631 is closed, the protection valve 61 connected to the first branch pipeline 101 is disconnected. When the common interface 631 is open, the first branch pipeline 101 can communicate with at least one branch valve pipeline 62 through the steering valve 63. At this time, the pressure of the main delivery pipeline 100 is determined by the protection valve 61 with the smallest pressure relief threshold among the several protection valves 61 communicated by the first branch pipeline 101; it also includes a safety valve 7 and a second branch pipeline 102. The second branch pipeline 102 is connected to the main delivery pipeline 100, and the safety valve 7 is connected to the second branch pipeline 102 and remains in a connected state. The pressure relief threshold of the safety valve 7 is greater than the pressure relief threshold of the protection valve 61.
[0022] By connecting the pressure regulating device 6 to the main delivery pipeline 100, the pressure regulating device 6 includes a plurality of protection valves 61 with different pressure relief thresholds. By selecting the protection valve 61 corresponding to the pressure relief threshold, the pressure of the main delivery pipeline 100 can be controlled. In this way, multiple brewing and extraction pressures can be achieved on a single coffee machine, which is very convenient; the present invention only needs to add several protection valves 61 with different pressure relief thresholds and a rotary switch 633 to achieve multi-stage pressure regulation, without adding expensive control circuits and adjustable-speed water pumps 2. The overall structure is simple, the cost is low, and the performance is reliable.
[0023] Among them, the switching of the steering valve 63 has at least the following two implementation manners.
[0024] The first implementation manner is asFigure 1 As shown, a valve core passage 64 is provided on the rotary switch 633. By rotating the rotary switch 633, the common interface 631 can be closed or the common interface 631 can be communicated with any one of the branch pipe interfaces 632 through the valve core passage 64. When the valve core passage 64 communicates the common interface 631 with any one of the branch pipe interfaces 632, the pressure of the main delivery pipeline 100 is determined by the threshold value of the connected protection valve 61. When the common interface 631 is closed by the rotary switch 633, the pressure of the main delivery pipeline 100 is determined by the threshold value of the safety valve 7 connected to the second branch pipeline 102.
[0025] In this embodiment, the protection valve 61 includes a first protection valve 61a and a second protection valve 61b arranged in sequence. The pressure relief threshold value of the first protection valve 61a is V1, and the pressure relief threshold value of the second protection valve 61a is V2. Correspondingly, the first protection valve 61a is connected with the branch valve pipeline 62a, and the branch valve pipeline 62a is connected with the branch pipe interface 632a; the second protection valve 61b is connected with the branch valve pipeline 62b, and the branch valve pipeline 62b is connected with the branch pipe interface 632b. In addition, the pressure relief threshold value of the safety valve 7 is V4, where V1≠V2<V4.
[0026] The second control method is as Figure 2 shown. Each protection valve 61 is connected to the steering valve 63 in the order of the size of the pressure relief threshold value. When the common interface 631 is open and the rotary switch 633 is in the starting position, the first branch pipeline 101 can be communicated with all the branch valve pipelines 62 through the steering valve 63. When the rotary switch 633 is rotated forward, the branch pipe interfaces 632 can be continuously closed in the order of increasing pressure relief threshold value to control the pressure of the main delivery pipeline 100 to change from small to large in turn. When the rotary switch 633 is rotated to the end position, the branch valve pipeline 62 corresponding to the protection valve 61 with the largest pressure relief threshold value is communicated with the first branch pipeline 101; when the rotary switch 633 is rotated backward, the pressure of the main delivery pipeline 100 can be controlled to change from large to small in turn; when the common interface 631 is closed by the rotary switch 633, the pressure of the main delivery pipeline 100 is determined by the threshold value of the safety valve 7 connected to the second branch pipeline 102.
[0027] In this embodiment, the protection valve 61 includes a first protection valve 61a, a second protection valve 61b, and a third protection valve 61c arranged in sequence. The pressure relief threshold of the first protection valve 61a is V1, the pressure relief threshold of the second protection valve 61a is V2, and the pressure relief threshold of the third protection valve 61c is V3. Correspondingly, the first protection valve 61a is connected to the branch valve pipeline 62a, and the branch valve pipeline 62a is connected to the branch pipe interface 632a; the second protection valve 61b is connected to the branch valve pipeline 62b, and the branch valve pipeline 62b is connected to the branch pipe interface 632b; the third protection valve 61c is connected to the branch valve pipeline 62c, and the branch valve pipeline 62c is connected to the branch pipe interface 632c. In addition, the pressure relief threshold of the safety valve 7 is V4, where V1 < V2 < V3 < V4.
[0028] The advantage of the present invention is that when adjusting the pressure, generally a single channel is used to connect the common interface 631 and the corresponding branch pipe interface 632. This interface-to-interface connection is not a big problem for a small number of branch pipe interfaces 632 and can still ensure the accuracy of control. However, if a large number of pressure levels need to be set, the sealing area between the branch pipe interfaces 632 is limited, and the single-channel connection method is obviously not applicable. The present invention controls by sequentially closing the branch pipe interfaces 632 in ascending order of the pressure relief threshold by rotating the rotary switch 633. Only one set of sealing structures is required to completely seal the unused branch pipe interfaces 632, while the branch pipe interfaces 632 corresponding to the required pressure relief thresholds and other branch pipe interfaces 632 corresponding to larger pressure relief thresholds remain connected. This control method has a simpler sealed connection structure and is suitable for structures with less sealed space.
[0029] Preferably, it further includes a third branch pipeline 103 and a steam generating device 8. The second branch pipeline 102 is connected to the main delivery pipeline 100, and the steam generating device 8 is connected to the third branch pipeline 103. It further includes a first solenoid valve 91, and the first solenoid valve 91 is connected to the third branch pipeline 103 between the main delivery pipeline 100 and the steam generating device 8. The first solenoid valve 91 can control the opening and closing of the third branch pipeline 103.
[0030] Preferably, it further includes a second solenoid valve 92, and the second solenoid valve 92 is connected to the third branch pipeline 103 downstream of the steam generating device 8. The second solenoid valve 92 can control the opening and closing of the third branch pipeline 103.
[0031] Preferably, it further includes a controller (not shown in the figure). The water pump 2, the heating device 3, the first solenoid valve 91 and the second solenoid valve 92 are signal-connected to the controller, and the controller can control the opening or closing of the water pump 2, the heating device 3, the first solenoid valve 91 and the second solenoid valve 92.
[0032] Preferably, it further includes a four-way valve 110. The four-way valve 110 includes a first valve port 111, a second valve port 112, a third valve port 113 and a fourth valve port 114. The four-way valve 110 is disposed on the main delivery pipeline 100. The first valve port 111 is used to connect to the water pump 2, the second valve port 112 is used to connect to the first branch pipeline 101, the third valve port 113 is used to connect to the main delivery pipeline 100, and the fourth valve port 114 is used to connect to the third branch pipeline 103.
[0033] Preferably, it further includes a third solenoid valve 93. The third solenoid valve 93 is connected to the connecting pipeline between the heating device 3 and the brewing device 4, and the third solenoid valve 93 can control the opening and closing of the connecting pipeline between the heating device 3 and the brewing device 4.
[0034] Preferably, it further includes a three-way valve 120 and a pressure display 130. Two of the valve ports of the three-way valve 120 are respectively connected to the water pump 2 and the one-way valve 5, and the pressure display 130 is connected to the third valve port of the three-way valve 120. The pressure display 130 is used to display the pressure in the delivery pipeline.
[0035] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.
Claims
1. A coffee machine capable of multi-stage pressure regulation, comprising a water pump, a heating device and a brewing device. The water pump is connected to the water inlet of the heating device, and the water outlet of the heating device is connected to the brewing device. The water pump can transport water to the heating device, and the water heated by the heating device can flow to the brewing device; characterized in that, it further comprises a check valve and a pressure regulating device. The check valve is arranged between the water pump and the heating device. A main delivery pipeline is connected between the check valve and the heating device. A first branch pipeline is connected to the main delivery pipeline. The pressure regulating device is connected to the first branch pipeline. The pressure regulating device comprises at least two protection valves with different pressure relief thresholds. Each protection valve is also respectively connected with a branch valve pipeline. The pressure regulating device further comprises a steering valve. The steering valve comprises a common interface connected to the first branch pipeline, branch interfaces respectively connected to each branch valve pipeline and a rotary switch. By rotating the rotary switch, the common interface can be closed or opened. When the common interface is in the closed state, the protection valve connected to the first branch pipeline is disconnected. When the common interface is in the open state, the first branch pipeline can be communicated with at least one of the branch valve pipelines through the steering valve. The pressure of the main delivery pipeline is determined by the protection valve with the smallest pressure relief threshold among several protection valves communicated with the first branch pipeline; it further comprises a safety valve and a second branch pipeline. The second branch pipeline is connected to the main delivery pipeline. The safety valve is connected to the second branch pipeline and remains in a communicating state. The pressure relief threshold of the safety valve is greater than the pressure relief threshold of the protection valve.
2. The coffee machine capable of multi-stage pressure regulation according to claim 1, wherein, Each protection valve is connected to the steering valve in the order of the size of the pressure relief threshold. When the common interface is open and the rotary switch is in the starting position, the first branch pipeline can be communicated with all the branch valve pipelines through the steering valve. When the rotary switch is rotated forward, the branch interfaces can be sequentially and continuously closed in the order of increasing pressure relief threshold to control the pressure of the main delivery pipeline to change from small to large in turn. When the rotary switch is rotated to the end position, the branch valve pipeline corresponding to the protection valve with the largest pressure relief threshold is communicated with the first branch pipeline; when the rotary switch is rotated backward, the pressure of the main delivery pipeline can be controlled to change from large to small in turn; when the common interface is closed by the rotary switch, the pressure of the main delivery pipeline is determined by the threshold of the safety valve connected to the second branch pipeline.
3. The coffee machine capable of multi-stage pressure regulation according to claim 1, wherein, A spool channel is arranged on the rotary switch. By rotating the rotary switch, the common interface can be closed or the common interface can be communicated with any one of the branch interfaces through the spool channel; when the spool channel communicates the common interface with any one of the branch interfaces, the pressure of the main delivery pipeline is determined by the threshold of the protection valve communicated therewith. When the common interface is closed by the rotary switch, the pressure of the main delivery pipeline is determined by the threshold of the safety valve connected to the second branch pipeline.
4. The coffee machine capable of multi-stage pressure regulation according to any one of claims 1 to 3, characterized in that It further includes a third pipeline and a steam generating device. The second pipeline is connected to the main delivery pipeline, and the steam generating device is connected to the third pipeline. It also includes a first solenoid valve, which is connected to the third pipeline between the main delivery pipeline and the steam generating device, and the first solenoid valve can control the opening and closing of the third pipeline.
5. The coffee machine capable of multi-stage voltage regulation according to claim 4, characterized in that, It further includes a second solenoid valve, which is connected to the third pipeline downstream of the steam generating device, and the second solenoid valve can control the opening and closing of the third pipeline.
6. The coffee machine capable of multi-stage voltage regulation according to claim 5, characterized in that, It further includes a controller, which is connected to and can control the water pump, the heating device, the first solenoid valve and the second solenoid valve.
7. The coffee machine capable of multi-stage pressure regulation according to claim 4, characterized in that, It further includes a four-way valve, which includes a first valve port, a second valve port, a third valve port and a fourth valve port. The four-way valve is arranged on the main delivery pipeline. The first valve port is used to connect to the water pump, the second valve port is used to connect to the first pipeline, the third valve port is used to connect to the main delivery pipeline, and the fourth valve port is used to connect to the third pipeline.
8. The coffee machine capable of multi-stage voltage regulation according to any one of claims 1 to 3, characterized in that It further includes a third solenoid valve, which is connected to the connecting pipeline between the heating device and the brewing device, and the third solenoid valve can control the opening and closing of the connecting pipeline between the heating device and the brewing device.
9. The coffee machine capable of multi-stage pressure regulation according to any one of claims 1 to 3, characterized in that, It further includes a three-way valve and a pressure display. Two of the valve ports of the three-way valve are respectively connected to the water pump and the check valve, and the pressure display is connected to the third valve port of the three-way valve. The pressure display is used to display the pressure in the delivery pipeline.
10. The coffee machine capable of multi-stage voltage regulation according to any one of claims 1 to 3, characterized in that, It further includes a water tank, which is used to store water. The water pump is connected to the water tank and can pump water from the water tank.