Pressure release valve of coffee machine

Abstract

The utility model relates to the field of coffee machines, and discloses a pressure release valve of a coffee machine, which comprises a pressure release valve body, a water inlet used for feeding water and a water outlet used for discharging water are arranged on the pressure release valve body, and a valve core used for controlling the water inlet and the water outlet to be communicated or closed is arranged between the water inlet and the water outlet. An elastic piece used for pushing the valve element to disconnect the water inlet and the water outlet in the normal state is arranged in the pressure release valve body, a water flow control part used for improving the stability of the flow of water flowing out of the water outlet is arranged in the valve element, and the water flow control part comprises a water inlet runner arranged in the valve element and communicated with the water inlet. The inner wall of the water inlet flow channel is provided with a throttling hole which is communicated with the water inlet flow channel and the water outlet after the valve element is pushed by water pressure and can control the flow of water flowing out of the water inlet flow channel, and the throttling hole can control the flow of water flowing into the water outlet, so that the flow of water flowing out of the water outlet is more stable.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, and in particular to a pressure relief valve for coffee machines. Background Technology

[0002] Chinese Patent No. CN201053521Y discloses an automatic pressure relief valve, including a valve plate, a valve body with a valve cavity and an inlet and an outlet connecting the valve cavity, a valve plug that can be repositioned to connect or disconnect the inlet and outlet and a spring for pushing the valve plug inside the valve cavity, a drain port at the other end of the valve cavity opposite to the inlet, the valve plug and the spring being located between the inlet and the drain port, the spring extending and the valve plug closing the inlet and the outlet connecting the drain port; the spring compressing and the valve plug closing the flow channel between the drain port and the outlet and the inlet connecting the outlet.

[0003] In the above structure, when the water flows into the inlet, the water flow will push the valve plug to move closer to the outlet. At this time, the inlet and outlet will be connected to each other. However, the outlet and inlet are directly connected through the valve cavity, which causes the flow rate of water flowing out of the outlet to be unstable. Utility Model Content

[0004] This invention addresses the drawback of existing technologies where the water outlet and inlet are directly connected via a valve chamber, resulting in unstable water flow from the outlet. It provides a pressure relief valve for coffee machines that can make the water flow from the outlet more stable.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0006] A pressure relief valve for a coffee machine includes a pressure relief valve body, which has an inlet for water intake and an outlet for water output. A valve core is disposed between the inlet and the outlet to control their interconnection or closure. An elastic element is disposed within the pressure relief valve body to push the valve core to disconnect the connection between the inlet and the outlet under normal conditions. A water flow control component is disposed within the valve core to improve the stability of the water flow rate from the outlet. The water flow control component includes an inlet channel disposed within the valve core and interconnected with the inlet. A throttling orifice is disposed on the inner wall of the inlet channel to connect the inlet channel and the outlet when the valve core is pushed by water pressure and to control the water flow rate from the inlet channel.

[0007] With the above scheme, the throttling orifice set on the inlet channel can communicate with the outlet in the pressure relief valve body when the valve core moves under the push of water pressure. At this time, the water flowing in from the inlet will flow through the inlet channel, the throttling orifice, and finally out of the outlet. When the inlet stops receiving water, the valve core will lose the thrust of the water flow. At this time, the valve core will reset under the action of the elastic element. As the valve core moves, the throttling orifice will be misaligned with the outlet. At this time, the water flow can no longer flow out of the outlet. At the same time, the throttling orifice can also control the water flow into the outlet, making the water flow out of the outlet more stable.

[0008] Preferably, the pressure relief valve body is provided with a limiting component to prevent the valve core from continuing to move under pressure after the throttling orifice is fully connected to the outlet.

[0009] Preferably, the limiting component includes a blocking block disposed at one end of the pressure relief valve body opposite to the outlet, and the blocking block is provided with an insertion hole for partial insertion when the valve core moves due to the pressure of the water flow; when the water inlet channel and the water outlet are connected to each other, the end of the valve core and the bottom surface of the insertion hole press against each other.

[0010] Using the above scheme, when the valve core moves under the pressure of the water flow, the end of the valve core away from the inlet will gradually approach the blocking block and eventually be inserted into the socket on the blocking block. When the end of the valve core away from the inlet abuts against the bottom of the socket, the blocking block will limit the movement of the valve core, thereby preventing the throttling orifice connected to the outlet from closing again due to excessive movement of the valve core.

[0011] Preferably, a damping component is provided on the inner wall of the socket to reduce the speed of valve core reset.

[0012] Preferably, the damping component includes pressing blocks evenly distributed circumferentially on the inner wall of the socket, which can abut against the surface of the valve core. The pressing blocks are telescopically mounted on the inner wall of the socket via a telescopic component.

[0013] Using the above scheme, the pressure block set on the inner wall of the socket can be inserted into the socket at the end of the valve core away from the water inlet and press against the surface of the valve core, thereby providing damping when the valve core resets, reducing the reset speed of the valve core, and allowing the water flowing into the pressure relief valve body to be discharged more fully. The telescopic component allows the pressure block to telescopically move inside the socket, making it easier to insert the valve core into the socket. At the same time, telescopically moving the pressure block inside the socket also allows the pressure block to press against valve cores of different sizes, thereby improving the applicability of the pressure block.

[0014] Preferably, the telescopic component includes a receiving groove on the inner wall of the socket for receiving the pressure block when it retracts. The number and position of the receiving grooves correspond one-to-one with the number and position of the pressure blocks. The pressure block is provided with an introducing component that drives the pressure block to partially retract into the receiving groove when the valve core is inserted into the socket. An elastic component is provided between the receiving groove and the pressure block that drives the pressure block to partially extend out of the receiving groove and press against the valve core.

[0015] Using the above scheme, the storage groove can be used to store the pressure block when it retracts. The guide component set on the pressure block can drive the pressure block to automatically retract into the storage groove when the valve core is inserted into the socket at the end away from the water inlet, thus facilitating the insertion of the valve core into the socket. The elastic component can drive the pressure block to be partially extended out of the storage groove under normal conditions. At the same time, when the pressure block is squeezed by the valve core and retracts into the storage groove, it can also drive the pressure block to extend out of the storage groove and press against the surface of the valve core, thereby increasing the damping when the valve core comes out of the socket.

[0016] Preferably, the inlet component includes an inlet ramp provided on the pressing block, the inlet ramp being inclined and decreasing in slope from one end near the bottom of the socket to the end away from the bottom of the socket.

[0017] Using the above scheme, the guide slope set on the pressure block can abut against the surface of the valve core when the valve core is inserted into the socket. When the guide slope contacts the surface of the valve core and the valve core continues to be inserted into the socket, the valve core will squeeze the guide slope, thereby causing the pressure block to retract into the receiving groove.

[0018] Preferably, the elastic component includes a spring disposed between the receiving groove and the pressing block, with both ends of the spring abutting against each other.

[0019] Using the above scheme, the spring installed between the receiving groove and the pressing block can drive the pressing block to partially extend out of the receiving groove under normal conditions. At the same time, when the pressing block is squeezed by the valve core and retracts into the receiving groove, it can also drive the pressing block to extend out of the receiving groove and press against the surface of the valve core, thereby increasing the damping when the valve core comes out of the insertion hole.

[0020] This utility model, by adopting the above technical solution, has significant technical effects: the throttling orifice set on the water inlet channel can communicate with the water outlet inside the pressure relief valve body when the valve core moves under the push of water pressure. At this time, the water flowing in from the water inlet will flow through the water inlet channel, the throttling orifice, and finally flow out from the water outlet. When the water inlet stops flowing in, the valve core will lose the thrust of the water flow. At this time, the valve core will reset under the action of the elastic element. As the valve core moves, the throttling orifice will be misaligned with the water outlet. At this time, the water flow can no longer flow out from the water outlet. At the same time, the throttling orifice can also control the water flow rate into the water outlet, making the water flow rate out of the water outlet more stable. Attached Figure Description

[0021] Figure 1 This is an isometric view of a pressure relief valve for a coffee machine in Embodiment 1.

[0022] Figure 2 This is a cross-sectional view of a pressure relief valve for a coffee machine in Embodiment 1;

[0023] Figure 3 This is an isometric view of a pressure relief valve for a coffee machine in Embodiment 2;

[0024] Figure 4 This is a top view of a pressure relief valve for a coffee machine in Embodiment 2;

[0025] Figure 5 yes Figure 4 Sectional view at point AA;

[0026] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 This is the front view of the blocking block in Embodiment 2;

[0028] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0029] Figure 9 This is an isometric view of the pressure block in Embodiment 2.

[0030] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Pressure relief valve body; 2. Outlet; 3. Inlet; 4. Valve core; 5. Return spring; 6. Throttling orifice; 7. Blocking block; 8. Insertion hole; 9. Pressure block; 10. Receiving groove; 11. Spring; 12. Guide slope; 13. Inlet flow channel. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] A pressure relief valve for a coffee machine, reference Figures 1-2The device includes a pressure relief valve body 1, which has an inlet 3 for water intake and an outlet 2 for water discharge. A valve core 4 is provided between the inlet 3 and the outlet 2 to control whether they are connected or closed. An elastic element is provided inside the pressure relief valve body 1 to push the valve core 4 to disconnect the connection between the inlet 3 and the outlet 2 under normal conditions. In this embodiment, the elastic element is a return spring 5. A water flow control component is provided inside the valve core 4 to improve the stability of the water flow rate from the outlet 2. The water flow control component includes an inlet channel 13 that is connected to the inlet 3 and is provided inside the valve core 4. A throttling orifice 6 is provided on the inner wall of the inlet channel 13 to connect the inlet channel 13 and the outlet 2 when the valve core 4 is pushed by water pressure and to control the water flow rate from the inlet channel 13.

[0034] Example 2

[0035] The difference between this embodiment and Embodiment 1 is that, referring to... Figures 3-9 The pressure relief valve body 1 is provided with a limiting component to prevent the valve core 4 from continuing to move under pressure after the throttling orifice 6 is fully connected to the outlet 2. The limiting component includes a blocking block 7 provided at the end of the pressure relief valve body 1 opposite to the outlet 2. The blocking block 7 is provided with a insertion hole 8 for partial insertion when the valve core 4 moves due to the pressure of the water flow. When the inlet channel 13 is connected to the outlet 2, the end of the valve core 4 and the bottom surface of the insertion hole 8 press against each other.

[0036] A damping component is provided on the inner wall of the socket 8 to reduce the speed of the valve core 4 during reset. The damping component includes pressing blocks 9 evenly distributed circumferentially on the inner wall of the socket 8 that can abut against the surface of the valve core 4. The pressing blocks 9 are telescopically mounted on the inner wall of the socket 8 via a telescopic component. The telescopic component includes receiving grooves 10 on the inner wall of the socket 8 for receiving the pressing blocks 9 during retraction. The number and position of the receiving grooves 10 correspond one-to-one with the number and position of the pressing blocks 9. The pressing blocks 9 are provided with a mechanism that drives the valve core 4 when it is inserted into the socket 8. The pressing block 9 is partially retracted into the receiving groove 10. An elastic component is provided between the receiving groove 10 and the pressing block 9 to drive the pressing block 9 to partially extend out of the receiving groove 10 and press against the valve core 4. The guiding component includes a guiding inclined surface 12 provided on the pressing block 9. The guiding inclined surface 12 slopes and decreases from one end near the bottom of the insertion hole 8 to the end away from the bottom of the insertion hole 8. The elastic component includes a spring 11 provided between the receiving groove 10 and the pressing block 9. The two ends of the spring 11 abut against each other.

[0037] The specific drainage process is as follows: When water flows into the inlet 3 on the pressure relief valve body 1, the water flow will squeeze the valve core 4 inside the pressure relief valve body 1, causing the valve core 4 to move away from the inlet 3. While squeezing the valve core 4, some of the water flowing into the inlet 3 will flow into the inlet channel 13. As the valve core 4 moves, the throttling orifice 6 on the inlet channel 13 will gradually connect with the outlet 2. When the throttling orifice 6 connects with the outlet 2, the water flowing into the inlet channel 13 will flow into the outlet 2 through the throttling orifice 6 and finally flow out from the outlet 2. As the valve core 4 moves, the end of the valve core 4 away from the inlet 3 will gradually approach the blocking block 7 and gradually insert into the insertion hole 8 on the blocking block 7. When the valve core 4 is inserted into the insertion hole 8, the valve core 4 will first press against the guide slope 12 on the pressure block 9, causing the pressure block 9 to retract into the receiving groove 10. At this time, the pressure block 9 and the receiving groove 10 are connected. When the spring 11 between 0 and 0 is compressed, the spring 11 will exert a reaction force on the pressure block 9, so that the end of the pressure block 9 presses against the surface of the valve core 4. When the surface of the valve core 4 abuts against the bottom of the socket 8, the blocking block 7 will block the movement of the valve core 4, and the throttling hole 6 on the valve core 4 will remain in communication with the outlet 2. When the water flow stops flowing into the inlet 3, the reset spring 5 will gradually push the valve core 4 to move closer to the inlet 3. When the valve core 4 moves towards the inlet 3, the end of the valve core 4 away from the inlet 3 will gradually disengage from the socket 8. At this time, the surface of the valve core 4 will rub against the pressure block 9, thereby reducing the speed at which the valve core 4 disengages from the socket 8, allowing the water flowing into the valve core 4 to have more time to discharge. At the same time, it can also reduce the probability of the valve core 4 colliding with the inner wall of the pressure relief valve body 1 during reset, and reduce the probability of the valve core 4 being damaged during reset.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A pressure relief valve for a coffee machine, comprising a pressure relief valve body (1), wherein the pressure relief valve body (1) is provided with an inlet (3) for water inlet and an outlet (2) for water outlet, a valve core (4) is provided between the inlet (3) and the outlet (2) for controlling the mutual connection or closure of the two, and an elastic element is provided inside the pressure relief valve body (1) for pushing the valve core (4) to disconnect the connection between the inlet (3) and the outlet (2) under normal conditions, characterized in that: A water flow control component is provided in the valve core (4) to improve the stability of the water flow rate from the outlet (2). The water flow control component includes an inlet channel (13) provided in the valve core (4) and communicating with the inlet (3). A throttling orifice (6) is provided on the inner wall of the inlet channel (13) to connect the inlet channel (13) and the outlet (2) when the valve core (4) is pushed by water pressure and to control the water flow rate from the inlet channel (13).

2. The pressure relief valve for a coffee machine according to claim 1, characterized in that: The pressure relief valve body (1) is equipped with a limiting component to prevent the valve core (4) from continuing to move under pressure after the throttling orifice (6) is fully connected to the outlet (2).

3. A pressure relief valve for a coffee machine according to claim 2, characterized in that: The limiting component includes a blocking block (7) located inside the pressure relief valve body (1) at one end opposite to the outlet (2). The blocking block (7) has a socket (8) for partial insertion when the valve core (4) moves due to the pressure of the water flow. When the inlet channel (13) and the outlet (2) are connected to each other, the end of the valve core (4) and the bottom surface of the socket (8) press against each other.

4. A pressure relief valve for a coffee machine according to claim 3, characterized in that: A damping component is provided on the inner wall of the socket (8) to reduce the speed of the valve core (4) during reset.

5. A pressure relief valve for a coffee machine according to claim 4, characterized in that: The damping component includes a pressure block (9) that is circumferentially distributed on the inner wall of the socket (8) and can abut against the surface of the valve core (4). The pressure block (9) is telescopically mounted on the inner wall of the socket (8) by a telescopic component.

6. A pressure relief valve for a coffee machine according to claim 5, characterized in that: The telescopic component includes a receiving groove (10) provided on the inner wall of the insertion hole (8) for receiving the pressure block (9) when it retracts. The number and position of the receiving groove (10) correspond one-to-one with the number and position of the pressure block (9). The pressure block (9) is provided with an introductory component that drives the pressure block (9) to partially retract into the receiving groove (10) when the valve core (4) is inserted into the insertion hole (8). An elastic component is provided between the receiving groove (10) and the pressure block (9) that drives the pressure block (9) to partially extend out of the receiving groove (10) and press against the valve core (4).

7. A pressure relief valve for a coffee machine according to claim 6, characterized in that: The inlet component includes an inlet ramp (12) provided on the pressing block (9), the inlet ramp (12) being inclined and decreasing from one end near the bottom of the socket (8) to the end away from the bottom of the socket (8).

8. A pressure relief valve for a coffee machine according to claim 6, characterized in that: The elastic component includes a spring (11) disposed between the receiving groove (10) and the pressing block (9), with both ends of the spring (11) abutting against each other.

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