Brewing head with pressure compensation

Abstract

The utility model relates to the technical field of coffee machines, and discloses a brewing head with pressure compensation, which comprises a brewing head body, a servo motor, a brewing head main support, an extraction head, a splitter, an extraction head filter screen, a high-pressure funnel and a decorative sheet, a driving shaft of the servo motor is connected with a first-stage driving gear, the first-stage driving gear is in meshed connection with a second-stage transmission gear through a gear, the second-stage transmission gear is in screwed connection with the extraction head through threads, the brewing head main support is arranged outside the brewing head body, two extraction head sealing rings are arranged on the outer ring of the extraction head, and the extraction head sealing rings are connected with the extraction head through threads. A temperature sensor, a pressure sensor and a water inlet connector are arranged in the extraction head. According to the utility model, the temperature and the pressure in the extraction process can be automatically compensated and adjusted at the same time during coffee extraction, so that the extraction effect is stabilized, and the coffee quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a brewing head with pressure compensation. Background Art

[0002] There are mainly three existing ways to adjust the water outlet pressure of coffee machines: one is that a DC variable frequency water pump changes the water outlet pressure by changing the rotational speed to change the water output; another is to manually adjust the pressure regulating valve to change the water output and thus change the water outlet pressure; and the other is to add an OPV valve so that when the waterway pressure of the coffee machine exceeds the preset value of the OPV valve during extraction, the waterway automatically relieves pressure to maintain the pressure value of the entire coffee machine waterway. The first DC variable frequency water pump has a high cost, and the second and third manual pressure regulating valves lack stability and accuracy.

[0003] The existing technology for optimizing waterway pressure regulation is nothing more than adding a pressure regulating valve at the waterway, such as the patent: CN115919152A, or using a variable volume transition chamber as a pressure compensation method to achieve stable pressure extraction of coffee without increasing the hot water flow, such as the patent: CN116982846A.

[0004] There are mainly two existing ways to adjust the temperature of the coffee machine brewing head: one is mainly to add a cold and hot water mixing device at the brewing head, such as the patent: CN220494826U, and the other is a saturated brewing head that directly connects the boiler or heating block to the brewing head, such as the patent: CN118078109A. For the first one, the water temperature for extracting coffee after mixing cold and hot water is uncontrollable and cannot effectively and accurately perform temperature compensation. For the second one, the heating block or boiler is directly connected to the brewing head, and the AC strong electricity is relatively close to the user, which is likely to cause safety problems and this method has a high cost.

[0005] In the existing technology, there is no brewing head technology that can simultaneously adjust the brewing temperature and brewing pressure. Most brewing heads can only achieve one method separately or can only adjust the pressure or the temperature, and most of them require manual adjustment by humans.

[0006] Therefore, those skilled in the art have provided a brewing head with pressure compensation to solve the problems raised in the above background art. Summary of the Utility Model

[0007] The purpose of the summary of the utility model is to solve the deficiencies existing in the prior art, and a brewing head with pressure compensation is proposed, which solves the problem that in the existing technology, there is no brewing head technology that can simultaneously adjust the brewing temperature and brewing pressure. Most brewing heads can only achieve one method separately or can only adjust the pressure or the temperature, and most of them require manual adjustment by humans.

[0008] To achieve the above object, the utility model provides the following technical solutions:

[0009] A brewing head with pressure compensation, comprising a brewing head body, a servo motor, a main brewing head bracket, an extraction head, a shunt plate, an extraction head filter screen, a high-pressure funnel and a decorative plate. The servo motor is arranged inside the brewing head body. A first-stage driving gear is connected to the driving shaft of the servo motor. The first-stage driving gear is meshed and connected with a second-stage transmission gear through a gear. The second-stage transmission gear is screwed and connected with the extraction head. The main brewing head bracket is arranged outside the brewing head body;

[0010] Two extraction head sealing rings are arranged on the outer circle of the extraction head. A temperature sensor, a pressure sensor and a water inlet joint are arranged inside the extraction head. The temperature sensor, the pressure sensor and the water inlet joint are fixed inside the extraction head through a sensor pressing plate. The shunt plate is arranged at the water outlet of the extraction head. The extraction head filter screen is arranged at the lower end of the shunt plate and fixed below the extraction head with screws. The high-pressure funnel is connected to the extraction head bracket through a connecting structure;

[0011] Through the above technical solutions, the extraction head inside is provided with a water inlet, a temperature sensor and a pressure sensor, which can read the liquid temperature and extraction pressure inside the extraction funnel in real time during the extraction process. At the same time, an OPV valve is arranged in the water inlet pipeline connected to the water inlet. When the pressure is greater than 9 bar, it will automatically relieve pressure and stabilize the pressure, stabilizing the coffee extraction pressure. At the same time, a screw thread structure is arranged on the outer circle of the extraction head inside the brewing head. A transmission mechanism with a gear on the outer circle and a thread on the inner circle is arranged thereon. The transmission mechanism is driven by a motor and a gear. When the transmission mechanism rotates, it will drive the extraction head to move up and down, enabling the extraction head to perform pressing or relaxing actions on the coffee powder in the funnel, changing the extraction pressure inside the funnel, and thus stabilizing the pressure when the machine performs coffee extraction.

[0012] Further, the extraction head is connected to the extraction head bracket, and the extraction head can move up and down inside the cylinder of the extraction head bracket;

[0013] Through the above technical solutions, the extraction head is driven to move up and down, enabling the extraction head to perform pressing or relaxing actions on the coffee powder in the funnel, changing the extraction pressure inside the funnel.

[0014] Further, a funnel sealing ring is arranged at the lower end inside the extraction head bracket, and the funnel sealing ring seals the high-pressure funnel;

[0015] Through the above technical solutions, the funnel sealing ring seals the high-pressure funnel, preventing air leakage from occurring in the high-pressure funnel.

[0016] Furthermore, a groove is provided on the outer circle of the cylinder of the extraction head bracket, and a PTC ceramic heating sheet is provided at the groove on the outer circle of the cylinder of the extraction head bracket;

[0017] Through the above technical solution, the PTC ceramic heating sheet can perform temperature compensation when the brewing head extracts coffee.

[0018] Furthermore, the decorative sheet is fixed to the outer wall of the extraction head bracket through a clamping structure;

[0019] Through the above technical solution, the extraction head bracket is protected by the decorative sheet and can play a decorative role.

[0020] Furthermore, the clamping structure is composed of a clamping head and a buckle. The clamping head is connected to the upper end of the decorative sheet, the buckle is arranged on the outer wall of the extraction head bracket, and the clamping head and the buckle are connected by buckling;

[0021] Through the above technical solution, through the buckling connection between the clamping head and the buckle, the decorative sheet can be firmly installed outside the extraction head bracket to protect it.

[0022] Furthermore, the high-pressure funnel is internally provided with coffee powder in a cake shape.

[0023] The utility model has the following beneficial effects:

[0024] 1. A brewing head with pressure compensation proposed by the utility model has a water inlet, a temperature sensor and a pressure sensor in its internal extraction head, which can read the liquid temperature and extraction pressure inside the extraction funnel in real time during the extraction process. At the same time, an OPV valve is provided in the water inlet pipe connected to the water inlet. When the pressure is greater than 9 bar, it will automatically relieve pressure and stabilize the pressure, stabilizing the coffee extraction pressure, enabling it to move according to the current extraction pressure, applying or releasing pressure to the coffee powder cake, so as to make the extraction pressure of the extraction system stable.

[0025] 2. A brewing head with pressure compensation proposed by the utility model has a lead screw thread structure on the outer circle of the extraction head inside the brewing head, and a transmission mechanism with a gear on the outer circle and a thread on the inner circle is provided thereon. The transmission mechanism is driven by a motor and a gear. When the transmission mechanism rotates, it will drive the extraction head to move up and down, enabling the extraction head to compact or relax the coffee powder in the funnel, changing the extraction pressure inside the funnel, and thus stabilizing the pressure when the machine extracts coffee.

[0026] 3. A brewing head with pressure compensation proposed by the present utility model is provided with an extraction head bracket inside the brewing head mechanism. The inside of the extraction head bracket is a cylinder for assembling the extraction head, and a groove is provided on the outer circle of the cylinder for assembling the PTC ceramic heating sheet. The PTC ceramic heating disk functions to compensate the temperature during coffee extraction by the brewing head, can synchronously adjust the extraction temperature and extraction pressure, ensure the coffee quality, make it have a heat preservation function, avoid the influence of the ambient temperature on the extraction system, and improve the coffee quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The front view of a brewing head with pressure compensation proposed by the present utility model;

[0028] Figure 2 The exploded view of a brewing head with pressure compensation proposed by the present utility model;

[0029] Figure 3 The sectional view of a brewing head with pressure compensation proposed by the present utility model;

[0030] Figure 4 The state diagram of the first pressure regulation method during coffee extraction of a brewing head with pressure compensation proposed by the present utility model;

[0031] Figure 5 The state diagram of the second pressure regulation method during coffee extraction of a brewing head with pressure compensation proposed by the present utility model.

[0032] Legend Explanation:

[0033] 100, brewing head body; 101, servo motor; 102, first-stage driving gear; 103, main brewing head bracket; 104, second-stage transmission gear; 105, extraction head; 106, extraction head sealing ring; 107, temperature sensor; 108, pressure sensor; 109, sensor pressing piece; 110, water inlet joint; 111, shunt piece; 112, extraction head filter screen; 113, PTC ceramic heating sheet; 114, extraction head bracket; 115, funnel sealing ring; 116, high-pressure funnel; 117, decorative piece; 201, first cake-shaped coffee powder; 202, second cake-shaped coffee powder. DETAILED IMPLEMENTATION MANNER

[0034] Next, the technical solutions in the specific implementation manners of the present utility model will be clearly and completely described in conjunction with the drawings in the specific implementation manners of the present utility model. Obviously, the described specific implementation manners are only a part of the specific implementation manners of the present utility model, rather than all of the specific implementation manners. Based on the specific implementation manners of the present utility model, all other specific implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0035] Reference Figures 1 - 3 , a specific embodiment provided by the present utility model is as follows:

[0036] A brewing head with pressure compensation, comprising a brewing head body 100, a servo motor 101, a main brewing head bracket 103, an extraction head 105, a shunt plate 111, an extraction head filter screen 112, a high-pressure funnel 116 and a decorative plate 117. The servo motor 101 is arranged inside the brewing head body 100. A first-stage driving gear 102 is connected to the driving shaft of the servo motor 101. The first-stage driving gear 102 is meshed and connected with a second-stage transmission gear 104 through a gear. The second-stage transmission gear 104 is screwed and connected with the extraction head 105. The main brewing head bracket 103 is arranged outside the brewing head body 100;

[0037] Two extraction head sealing rings 106 are arranged on the outer circle of the extraction head 105. A temperature sensor 107, a pressure sensor 108 and a water inlet joint 110 are arranged inside the extraction head 105. The temperature sensor 107, the pressure sensor 108 and the water inlet joint 110 are fixed inside the extraction head 105 through a sensor pressing piece 109. The shunt plate 111 is arranged at the water outlet of the extraction head 105. The extraction head filter screen 112 is arranged at the lower end of the shunt plate 111 and fixed below the extraction head 105 with screws. The high-pressure funnel 116 is connected to the extraction head bracket 114 through a connecting structure;

[0038] Through the above technical solution, the extraction head 105 inside it is provided with a water inlet, a temperature sensor 107 and a pressure sensor 108, which can read the liquid temperature and extraction pressure inside the extraction funnel in real time during the extraction process. At the same time, an OPV valve is arranged in the water inlet pipeline connected to the water inlet. When the pressure is greater than 9 bar, it will automatically relieve pressure and stabilize the pressure, stabilizing the coffee extraction pressure. At the same time, a lead screw thread structure is arranged on the outer circle of the extraction head 105 inside the brewing head, and a transmission mechanism with a gear on the outer circle and a thread on the inner circle is arranged thereon. The transmission mechanism is driven by a motor and a gear. When the transmission mechanism rotates, it will drive the extraction head 105 to move up and down, enabling the extraction head 105 to perform pressing or relaxing actions on the coffee powder in the funnel, causing the extraction pressure inside the funnel to change, thereby stabilizing the pressure when the machine performs coffee extraction.

[0039] The extraction head 105 is connected to the extraction head bracket 114, and the extraction head 105 can move up and down inside the cylinder of the extraction head bracket 114, driving the extraction head 105 to move up and down, enabling the extraction head 105 to perform pressing or relaxing actions on the coffee powder in the funnel, causing the extraction pressure inside the funnel to change.

[0040] A funnel sealing ring 115 is provided at the lower end of the extraction head bracket 114 , and the funnel sealing ring 115 seals the high-pressure funnel 116 , thereby preventing the high-pressure funnel 116 from leaking.

[0041] The outer ring of the cylinder of the extraction head bracket 114 is provided with a groove, and a PTC ceramic heating plate 113 is provided in the groove of the outer ring of the cylinder of the extraction head bracket 114. The PTC ceramic heating plate 113 can perform temperature compensation when the brewing head extracts coffee.

[0042] The decorative sheet 117 is fixed to the outer wall of the extraction head bracket 114 through a clamping structure. The decorative sheet 117 protects the extraction head bracket 114 and serves as a decoration.

[0043] The snap-fit ​​structure consists of a snap joint and a buckle. The snap joint is connected to the upper end of the decorative sheet 117. The buckle is set on the outer wall of the extraction head bracket 114. The snap joint and the buckle are snap-fitted together. Through the snap-fit ​​connection between the snap joint and the buckle, the decorative sheet 117 can be firmly installed on the outside of the extraction head bracket 114 to protect it. The high-pressure funnel 116 is provided with coffee powder 201 in the shape of a cake.

[0044] Working principle: The voltage regulation method is as follows: Figure 4 As shown, when the user extracts coffee, a cake-shaped coffee powder 201 is provided inside the high-pressure funnel 116. When the cake-shaped coffee powder 201 is less, the extraction head 105 is in the initial position, and the pressure applied to the cake-shaped coffee powder 201 is less. At this time, the coffee machine is working, and a low-pressure extraction action occurs in the brewing head body 100. The pressure sensor 108 in the extraction head 105 reads that the pressure inside the high-pressure funnel 116 is low. At this time, the servo motor 101 starts to work and drives the primary drive gear 102 to rotate. At this time, the primary drive gear 102 rotates the secondary transmission gear 104 through the gear meshing relationship. At this time, the internal thread of the secondary transmission gear 104 drives the extraction head 105 to move downward and applies greater pressure to the coffee powder 201, so that the extraction pressure inside the high-pressure funnel 116 reaches 9 bar.

[0045] like Figure 5As shown, when the user performs coffee extraction, there is coffee powder cake two 202 inside the high-pressure funnel 116. When there is too much coffee powder cake two 202, when the extraction head 105 is in the initial position, the pressure it exerts on the coffee powder cake two 202 is relatively large. At this time, the coffee machine works, and a high-pressure extraction action occurs inside the brewing head body 100. At this time, the OPV valve 301 acts to relieve pressure, so that the extraction pressure inside the high-pressure funnel 116 tends to 9 bar. At the same time, the servo motor 101 starts to work and drives the first-stage drive gear 102 to rotate. At this time, the first-stage drive gear 102 causes the second-stage drive gear 104 to rotate through the gear meshing relationship. At this time, the internal thread of the second-stage drive gear 104 drives the extraction head 105 to move upward and reduce the pressure exerted on the coffee powder 202, so that the extraction pressure inside the high-pressure funnel 116 reaches 9 bar;

[0046] Its temperature adjustment method is as follows Figure 4 As shown, there is a groove on the outer side of the middle cylinder of the extraction head bracket 114, and the PTC ceramic heating sheet 113 is arranged on the groove on the outer side of the middle cylinder of the extraction head bracket 114. When the user performs coffee extraction, the temperature sensor 107 inside the extraction head 105 will read the temperature of the coffee liquid inside the high-pressure funnel 116 at this time. If the extraction temperature is too low at this time, the PTC ceramic heating sheet 113 works, heating the liquid inside the high-pressure funnel 116 to 93° to perform the coffee extraction action, ensuring the coffee quality. In particular, in the standby state, the PTC ceramic heating sheet 113 can also keep the extraction head bracket 114 warm, avoiding the influence of low ambient temperature on the coffee quality during the next extraction.

[0047] Finally, it should be noted that the above are only the preferred specific embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing specific embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A brewing head with pressure compensation, comprising a brewing head body (100), a servo motor (101), a main brewing head bracket (103), an extraction head (105), a shunt plate (111), an extraction head filter screen (112), a high-pressure funnel (116) and a decorative plate (117), characterized in that: The servo motor (101) is arranged inside the brewing head body (100). A primary drive gear (102) is connected to the drive shaft of the servo motor (101). The primary drive gear (102) is meshed and connected to a secondary transmission gear (104) through a gear. The secondary transmission gear (104) is screwed and connected to the extraction head (105). The main support (103) of the brewing head is arranged outside the brewing head body (100). Two extraction head sealing rings (106) are arranged on the outer ring of the extraction head (105). A temperature sensor (107), a pressure sensor (108) and a water inlet joint (110) are arranged inside the extraction head (105). The temperature sensor (107), the pressure sensor (108) and the water inlet joint (110) are fixed inside the extraction head (105) through a sensor pressing piece (109). A shunt piece (111) is arranged at the water outlet of the extraction head (105). An extraction head filter screen (112) is arranged at the lower end of the shunt piece (111) and is fixed below the extraction head (105) with screws. The high-pressure funnel (116) is connected to the extraction head support (114) through a connection structure.

2. The brewing head with pressure compensation according to claim 1, characterized in that: The extraction head (105) is connected to the extraction head support (114), and the extraction head (105) can move up and down inside the cylinder of the extraction head support (114).

3. The espresso head with pressure compensation according to claim 1, characterized in that: A funnel sealing ring (115) is arranged at the lower end inside the extraction head support (114), and the funnel sealing ring (115) seals the high-pressure funnel (116).

4. A brewing head with pressure compensation according to claim 1, characterized in that: A groove is arranged on the outer ring of the cylinder of the extraction head support (114), and a PTC ceramic heating sheet (113) is arranged at the groove on the outer ring of the cylinder of the extraction head support (114).

5. A brewing head with pressure compensation according to claim 1, characterized in that: The decorative piece (117) is fixed to the outer wall of the extraction head support (114) through a clamping structure.

6. The espresso head with pressure compensation according to claim 5, characterized in that: The clamping structure consists of a clamping head and a buckle. The clamping head is connected to the upper end of the decorative piece (117), and the buckle is arranged on the outer wall of the extraction head support (114). The clamping head and the buckle are buckled and connected to each other.

7. The espresso head with pressure compensation according to claim 1, characterized in that: Ground coffee (201) in a cake shape is arranged inside the high-pressure funnel (116).

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