Coffee machine pressure regulating valve and coffee machine

Abstract

The coffee machine pressure regulating valve comprises a valve body, a valve element, an elastic piece, a plug, a water inlet connector and a rotatable cam assembly, an inner cavity is formed in the valve body, the valve element and the elastic piece are arranged on the inner cavity, the water inlet connector is arranged at one end of the valve body, the plug is arranged between the valve body and the water inlet connector, and the cam assembly is arranged on the valve element. The elastic part is arranged between the valve element and the plug, the plug abuts against the water inlet connector, the valve element abuts against the cam assembly, the cam assembly acts on the valve element when rotating so that the valve element can move left and right to adjust the pressure, acting on the plug, of the elastic part, and the plug moves towards the valve element under the action of liquid pressure so that the water inlet connector can communicate with the inner cavity. According to the pressure regulating valve of the coffee machine, the assembly mode that the cam replaces a valve needle thread is adopted, the problem that the assembly angle of the valve needle cannot be controlled (namely, the assembly angles are not uniform) can be solved, and therefore the opening angle of the valve body can be accurately controlled, and the pipeline pressure can be accurately regulated.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and in particular to a coffee machine pressure regulating valve and a coffee machine. Background Technology

[0002] Chinese Patent Document No. CN203138101U, published on August 21, 2013, discloses a pressure regulating valve for a coffee machine. The valve includes a valve needle, a sealing ring, and a spring disposed within a valve body. The valve body has a first water inlet and a second water inlet. A two-stage fine-tuning device is also provided within the valve body. The two-stage fine-tuning device includes a first valve chamber disposed within the valve body, formed by the valve body and a nut. The valve needle includes a first-stage valve needle and a second-stage valve needle. The spring includes a first-stage pressure regulating spring and a second-stage pressure regulating spring. The sealing ring includes a first sealing ring and a third sealing ring. The first-stage valve needle and the first-stage pressure regulating spring are located within the first valve chamber. The first sealing ring is fitted onto one end of the first-stage valve needle, which is pressed against the first valve chamber of the valve body via the first sealing ring. One end of the first-stage pressure regulating spring is pressed against the first-stage valve needle, and the other end is pressed against the nut. A second valve chamber is provided within the first-stage valve needle. The pressure regulating valve of this coffee machine adjusts the pipeline pressure through a valve needle. The valve needle has threads that are assembled with the valve body. The machining method of the threads makes the assembly angle of each valve needle uncontrollable (i.e., the assembly angle is not uniform), which makes it impossible to accurately control the opening angle of the valve body, and therefore cannot accurately adjust the pipeline pressure.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this utility model is to provide a coffee machine pressure regulating valve and coffee machine that are simple in structure, have high adjustment accuracy, are easy to adjust, have a good user experience, and are highly practical, so as to overcome the shortcomings of the prior art.

[0005] A pressure regulating valve for a coffee machine, designed for this purpose, includes a valve body, characterized in that it further includes a valve core, an elastic element, a plug, a water inlet connector, and a rotatable cam assembly. The valve body has an inner cavity, on which the valve core and elastic element are disposed. The water inlet connector is disposed at one end of the valve body, the plug is disposed between the valve body and the water inlet connector, and the elastic element is disposed between the valve core and the plug. The plug abuts against the water inlet connector, and the valve core abuts against the cam assembly. When the cam assembly rotates, it acts on the valve core, causing the valve core to move left and right to adjust the pressure exerted by the elastic element on the plug. Under the action of liquid pressure, the plug moves towards the valve core, allowing the water inlet connector to connect to the inner cavity.

[0006] The cam assembly includes a cam and a knob. The knob is connected to the cam, and the valve core rests against the cam. When the knob is rotated under the action of an external force, it drives the cam to rotate, so that the cam acts on the valve core.

[0007] The valve body is equipped with a drain connector, and the inner cavity is connected to the drain connector.

[0008] It also includes a bracket, on which the cam is rotatably mounted. The cam is provided with a limiting component, and the bracket is provided with a limiting groove. When the cam rotates, it drives the limiting component to move on the limiting groove to limit the rotation angle of the cam.

[0009] One end of the elastic element is fitted onto one end of the valve core, and the other end of the valve core extends out of the inner cavity and rests against the cam.

[0010] The water inlet connector is provided with a water inlet hole, and the plug is installed at the other end of the elastic element. When the plug is against the water inlet connector, it closes the water inlet hole. When the plug moves towards the valve core, it opens the water inlet hole so that the water inlet hole can connect to the inner cavity.

[0011] The cam has a non-circular shaft, and the knob has a non-circular shaft hole. The shaft and the shaft hole are interlocked.

[0012] A first sealing ring is provided between the valve core and the inner cavity side wall. The first sealing ring is located on one side of the drain connector, and the water inlet connector is located on the other side of the drain connector.

[0013] A coffee machine designed for this purpose is characterized by comprising a water tank, a water pump, a first three-way connector, a heating device, a solenoid valve, a brewing head, and the coffee machine pressure regulating valve. The water outlet of the water tank is connected to the water pump, and the water pump is connected to the heating device and the water inlet connector respectively through the first three-way connector. The heating device, the solenoid valve, and the brewing head are connected in sequence, and the drain connector is connected to the water inlet of the water tank.

[0014] It also includes a main support frame, with the support frame and valve body respectively fixed on the main support frame.

[0015] This invention relates to a coffee machine pressure regulating valve. A rotatable cam assembly is used, which rotates and acts on the valve core, causing the core to move left and right. This adjusts the pressure exerted by the elastic element on the plug, i.e., the pressure exerted by the plug on the inlet connector. If the liquid pressure in the pipeline is higher than the pressure exerted by the plug on the inlet connector, the liquid will push open the plug. The liquid then flows through the inner cavity and drain connector out of the valve body, thus achieving the purpose of adjusting the pipeline pressure. Using a cam instead of a threaded valve needle assembly solves the problem of uncontrollable valve needle assembly angles (i.e., inconsistent assembly angles). Therefore, the valve body opening angle can be accurately controlled, thereby enabling accurate adjustment of the pipeline pressure. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of a coffee machine according to one embodiment of the present invention.

[0017] Figure 2 This is a partial structural diagram of the coffee machine from another position in one embodiment of the present invention.

[0018] Figure 3 This is an exploded view of the pressure regulating valve in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of the main support in one embodiment of the present invention.

[0020] Figure 5 This is a partial structural cross-sectional view of a coffee machine in one embodiment of the present invention.

[0021] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle.

[0022] Figure 7 This is a schematic diagram of the overall structure of the pressure regulating valve in one embodiment of the present invention.

[0023] Figure 8 This is a bottom view of the pressure regulating valve in one embodiment of the present invention.

[0024] Figure 9 This is an exploded view of the cam assembly in one embodiment of the present invention.

[0025] Figure 10 This is a schematic diagram of the water circuit of a coffee machine in one embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] See Figures 1-10 This coffee machine pressure regulating valve includes a valve body 1, a valve core 2, an elastic element 3, a plug 4, a water inlet connector 5, and a rotatable cam assembly. The valve body 1 has an inner cavity 6. The valve core 2 and the elastic element 3 are disposed on the inner cavity 6. The elastic element 3 is a spring. The water inlet connector 5 is disposed at one end of the valve body 1. The plug 4 is disposed between the valve body 1 and the water inlet connector 5. The elastic element 3 is disposed between the valve core 2 and the plug 4. The plug 4 abuts against the water inlet connector 5. The valve core 2 abuts against the cam assembly. When the cam assembly rotates, it acts on the valve core 2, causing the valve core 2 to move left and right to adjust the pressure of the elastic element 3 acting on the plug 4. Under the action of liquid pressure, the plug 4 moves towards the valve core 2, so that the water inlet connector 5 connects to the inner cavity 6.

[0028] The cam assembly includes a cam 7 and a knob 8. The knob 8 is connected to the cam 7. The valve core 2 rests against the cam 7. When the knob 8 rotates under external force, it drives the cam 7 to rotate, so that the cam 7 acts on the valve core 2. The top of the knob 8 is provided with a handle 24 for rotating the knob 8. By rotating the knob 8 through the handle 24, the knob 8 drives the cam 7 to rotate. When the cam 7 rotates, it acts on the valve core 2, so that the valve core 2 moves left and right. The pressure of the elastic element 3 acting on the plug 4 also changes accordingly, so as to adjust the pressure of the elastic element 3 acting on the plug 4, that is, to adjust the pressure of the plug 4 acting on the water inlet connector 5. If the liquid pressure in the pipeline is higher than the pressure of the plug 4 acting on the water inlet connector 5, the liquid will push open the plug 5, and the plug 5 will move in the direction of the valve core 2 (that is, move to the left). Then the liquid enters the inner cavity 6 through the water inlet hole 13, and is discharged from the valve body 1 through the inner cavity 6 and the drain connector 9, thereby achieving the purpose of adjusting the pipeline pressure.

[0029] A drain connector 9 is provided on the valve body 1, and a drain hole 25 is provided on the drain connector 9. The inner cavity 6 is connected to the drain hole 25.

[0030] It also includes a bracket 10, a cam 7 is rotatably mounted on the bracket 10, a limiting element 11 is provided on the cam 7, the limiting element 11 is a limiting pin, and a limiting groove 12 is provided on the bracket 10. When the cam 7 rotates, it drives the limiting element 11 to move on the limiting groove 12 to limit the rotation angle of the cam 7.

[0031] One end of the elastic element 3 is sleeved on one end of the valve core 2, and one end of the inner cavity 6 is provided with an opening 31. The other end of the valve core 2 extends out of the inner cavity 6 through the opening 31 and abuts against the cam 7.

[0032] The water inlet connector 5 is provided with a water inlet hole 13. The plug 4 is installed at the other end of the elastic member 3. When the plug 4 is against the water inlet connector 5, it closes the water inlet hole 13, so that the pipeline between the water pump 18 and the solenoid valve 21 forms a closed cavity. When the plug 4 moves towards the valve core 2, it opens the water inlet hole 13, so that the water inlet hole 13 connects to the inner cavity 6.

[0033] The cam 7 is provided with a non-circular shaft 14, and the knob 8 is provided with a non-circular shaft hole 15. The shaft 14 and the shaft hole 15 are interlocked, so that the knob 8 can drive the cam 7 to rotate when it is turned.

[0034] The bracket 10 is provided with a bushing 26, and the cam 7 is provided with a circular rotating shaft 27. The rotating shaft 27 is rotatably installed in the bushing 26, and the shaft body 14 is provided at one end of the rotating shaft 27.

[0035] The cam 7 is provided with a first fixing hole 28, and the knob 8 is provided with a second fixing hole 29. The fixing screw 30 passes through the first fixing hole 28 and is fastened to the second fixing hole 29 to connect the cam 7 and the knob 8.

[0036] A first sealing ring 16 is provided between the valve core 2 and the side wall of the inner cavity 6. The first sealing ring 16 is located on one side of the drain connector 9, and the water inlet connector 5 is located on the other side of the drain connector 9. The first sealing ring 16 can prevent the liquid entering the inner cavity 6 from flowing out of the valve body 1 through the opening 31.

[0037] A second sealing ring 32 is provided between the valve body 1 and the water inlet connector 5. The second sealing ring 32 can prevent the liquid entering the inner cavity 6 from flowing out of the valve body 1 through the gap between the valve body 1 and the water inlet connector 5.

[0038] This coffee machine includes a water tank 17, a water pump 18, a first three-way connector 19, a heating device 20, a solenoid valve 21, a brewing head 22, and a pressure regulating valve. The water outlet of the water tank 17 is connected to the water pump 18. The water pump 18 is connected to the heating device 20 and the water inlet connector 5 via the first three-way connector 19. The heating device 20, the solenoid valve 21, and the brewing head 22 are connected in sequence. The drain connector 9 is connected to the water inlet of the water tank 17 via a second three-way valve 33. A safety valve 34 is provided at one end of the water pump 18, and the safety valve 34 is connected to the water inlet of the water tank 17 via the second three-way valve 33. The solenoid valve 21 is a three-way solenoid valve, and the solenoid valve 21 is connected to the wastewater box of the coffee machine. The heating device 20 is a boiler. A bypass pipe 35 is provided between the water pump 18 and the heating device 20, and the pressure regulating valve of the coffee machine is connected to the bypass pipe 35.

[0039] When the coffee machine is working, the water pump 18 draws water from the water tank 17 to the heating device 20 for heating. The solenoid valve 21 opens, and the heated hot water enters the brewing head 22 through the solenoid valve 21 to extract coffee. When the liquid pressure in the coffee machine pipeline is higher than the pressure exerted by the plug 4 on the water inlet connector 5, the water in the bypass pipeline 35 will push open the plug 5, and then the water will enter the inner cavity 6 through the water inlet hole 13, and then be discharged from the valve body 1 through the inner cavity 6 and the drain connector 9, thereby achieving the purpose of adjusting the pipeline pressure. The water discharged from the valve body 1 flows back to the water tank 17.

[0040] It also includes a main support 23, with the support 10 and valve body 1 fixed to the main support 23 by screws, and the valve body 1 and cam assembly assembled together by the main support 23.

[0041] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure regulating valve for a coffee machine, comprising a valve body (1), characterized in that: It also includes a valve core (2), an elastic element (3), a plug (4), a water inlet connector (5), and a rotatable cam assembly. The valve body (1) is provided with an inner cavity (6). The valve core (2) and the elastic element (3) are located on the inner cavity (6). The water inlet connector (5) is located at one end of the valve body (1). The plug (4) is located between the valve body (1) and the water inlet connector (5). The elastic element (3) is located between the valve core (2) and the plug (4). The plug (4) abuts against the water inlet connector (5). The valve core (2) abuts against the cam assembly. When the cam assembly rotates, it acts on the valve core (2) to make the valve core (2) move left and right to adjust the pressure of the elastic element (3) on the plug (4). The plug (4) moves towards the valve core (2) under the action of liquid pressure so that the water inlet connector (5) connects to the inner cavity (6).

2. The coffee machine pressure regulating valve according to claim 1, characterized in that: The cam assembly includes a cam (7) and a knob (8). The knob (8) is connected to the cam (7). The valve core (2) rests against the cam (7). When the knob (8) rotates under the action of external force, it drives the cam (7) to rotate so that the cam (7) acts on the valve core (2).

3. The coffee machine pressure regulating valve according to claim 2, characterized in that: A drain connector (9) is provided on the valve body (1), and the inner cavity (6) is connected to the drain connector (9).

4. The coffee machine pressure regulating valve according to claim 3, characterized in that: It also includes a bracket (10), a cam (7) is rotatably mounted on the bracket (10), a limiter (11) is provided on the cam (7), and a limiter groove (12) is provided on the bracket (10). When the cam (7) rotates, it drives the limiter (11) to move on the limiter groove (12) to limit the rotation angle of the cam (7).

5. The coffee machine pressure regulating valve according to claim 4, characterized in that: One end of the elastic element (3) is fitted onto one end of the valve core (2), and the other end of the valve core (2) extends out of the inner cavity (6) and abuts against the cam (7).

6. The coffee machine pressure regulating valve according to claim 5, characterized in that: The water inlet connector (5) is provided with a water inlet hole (13), and the plug (4) is installed at the other end of the elastic member (3). When the plug (4) is against the water inlet connector (5), the water inlet hole (13) is closed. When the plug (4) moves toward the valve core (2), the water inlet hole (13) is opened so that the water inlet hole (13) is connected to the inner cavity (6).

7. The coffee machine pressure regulating valve according to claim 4, characterized in that: The cam (7) is provided with a non-circular shaft (14), and the knob (8) is provided with a non-circular shaft hole (15). The shaft (14) and the shaft hole (15) are connected to each other.

8. The coffee machine pressure regulating valve according to claim 4, characterized in that: A first sealing ring (16) is provided between the valve core (2) and the side wall of the inner cavity (6). The first sealing ring (16) is located on one side of the drain connector (9), and the water inlet connector (5) is located on the other side of the drain connector (9).

9. A coffee machine, characterized in that: The device includes a water tank (17), a water pump (18), a first tee connector (19), a heating device (20), a solenoid valve (21), a brewing head (22), and a coffee machine pressure regulating valve as described in any one of claims 4-8. The outlet of the water tank (17) is connected to the water pump (18). The water pump (18) is connected to the heating device (20) and the inlet connector (5) respectively through the first tee connector (19). The heating device (20), the solenoid valve (21), and the brewing head (22) are connected in sequence. The drain connector (9) is connected to the inlet of the water tank (17).

10. The coffee machine according to claim 9, characterized in that: It also includes a main support (23), with the support (10) and valve body (1) fixed on the main support (23).

Images