Pressure release valve

Abstract

The utility model discloses a pressure release valve which comprises a valve body upper cover, a valve body lower cover, a first valve core, a water inlet pipe, a water outlet pipe and a pressure release pipe, and a valve cavity is formed by closing the valve body upper cover and the valve body lower cover, and is characterized by further comprising a pressure release bypass pipe, and the valve cavity is divided into a first valve cavity and a second valve cavity by the first valve core; a small hole is formed in the first valve element so that the first valve cavity can be communicated with the second valve cavity. The water inlet pipe and the water outlet pipe are communicated with the first valve cavity; a first end opening of the pressure relief pipe is formed in the second valve cavity; the pressure relief bypass pipe is connected with a first flow channel and a second flow channel, the first flow channel is communicated with the first valve cavity, the second flow channel is communicated with the pressure relief pipe, a second valve element is arranged in the pressure relief bypass pipe, and the second valve element is used for opening or closing the first flow channel. The pressure relief valve is simple in structure, low in cost and capable of effectively relieving pressure and discharging residual air and water, and the phenomena that a coffee machine drips water and a water pump cannot pump water are avoided.

Description

Technical Field

[0001] This utility model relates to a pressure relief valve. Background Technology

[0002] After coffee is brewed, a certain amount of pressure remains in the internal pipes of a coffee machine. This pressure can cause residual water inside the machine to be squeezed out and drip from the coffee outlet, causing inconvenience to the user. To solve this problem, existing technologies typically use solenoid valves to close the pipes. While solenoid valves effectively prevent dripping, they are expensive and complex, increasing the manufacturing cost of the coffee machine. Furthermore, existing pressure relief valves, when not in use, cannot expel residual air, preventing the water pump from pumping water properly and affecting the normal operation of the coffee machine. Therefore, there is an urgent need for a pressure relief valve that is simple in structure, low in cost, and can effectively relieve pressure and expel residual air and water. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a pressure relief valve with a simple structure and low cost. This valve can effectively relieve pressure and discharge residual air and water, preventing the coffee machine from dripping water and the water pump from failing to draw water, thus overcoming the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A pressure relief valve includes a valve body upper cover, a valve body lower cover, a first valve core, an inlet pipe, an outlet pipe, and a pressure relief pipe. The valve body upper cover and the valve body lower cover together form a valve cavity. The valve cavity is characterized by further including a pressure relief bypass pipe. The first valve core divides the valve cavity into a first valve cavity and a second valve cavity. A small hole is provided on the first valve core to allow communication between the first and second valve cavities. The inlet pipe and the outlet pipe are connected to the first valve cavity. The first end of the pressure relief pipe opens into the second valve cavity. The pressure relief bypass pipe connects a first flow channel and a second flow channel. The first flow channel communicates with the first valve cavity, and the second flow channel communicates with the pressure relief pipe. A second valve core is disposed within the pressure relief bypass pipe, and the second valve core is used to open or close the first flow channel.

[0006] The first valve core includes a mounting part, an elastic diaphragm, and a switch head, with a first return spring disposed between the switch head and the first end opening of the pressure relief pipe.

[0007] The first end opening of the pressure relief pipe has an annular flange, the inner ring wall of the annular flange is provided with a slope section, and the switch head is provided with a conical body adapted to the slope section.

[0008] The elastic valve includes a base and a membrane, and the first return spring presses against the base and the periphery of the annular flange, respectively.

[0009] The membrane portion is an annular elastomer that arches toward the first valve cavity.

[0010] The inlet end of the water inlet pipe faces the base, and a recess is opened at the base directly opposite the inlet end pipe.

[0011] The central axis of the annular flange is perpendicular to the central axis of the main section of the pressure relief pipe.

[0012] A pipe seal is installed inside the pressure relief bypass pipe, and a second reset spring is installed between the pipe seal and the second valve core.

[0013] The above technical solution has the following beneficial effects:

[0014] The first valve core of this invention is made of food-grade silicone and works in conjunction with the first return spring, providing excellent elasticity and sealing performance. The valve core has a connecting hole, allowing the first and second valve chambers to communicate with each other. The first valve chamber is connected to the water inlet pipe of the coffee machine, and the second valve chamber is connected to the pressure relief pipe. When the internal pressure of the coffee machine is too high, water in the first valve chamber enters the second valve chamber through the pressure relief bypass pipe and is then discharged through the pressure relief pipe, thus achieving the pressure relief function. Because the valve core has a connecting hole, water and air in the first valve chamber can be discharged through the connecting hole, ensuring that no air or water remains in the first valve chamber and preventing problems with the water pump failing to draw water properly. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 The pressure relief valve of this utility model is three-dimensional. Figure 1 .

[0018] Figure 2 The pressure relief valve of this utility model is three-dimensional. Figure 2 .

[0019] Figure 3 This is a top view of the pressure relief valve of this utility model.

[0020] Figure 4 for Figure 3 AA cross-section diagram.

[0021] Figure 5 for Figure 3 BB cross-section diagram.

[0022] Figure 6 for Figure 3 CC cross-section diagram.

[0023] Figure 7 This is a cross-sectional view of the pressure relief pipe of this utility model.

[0024] Figure 8 This is a cross-sectional view of the first valve core of this utility model. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] See Figures 1-8 As shown, this utility model discloses a pressure relief valve, including a valve body upper cover 10, a valve body lower cover 20, a first valve core 2, an inlet pipe 1, an outlet pipe 3, and a pressure relief pipe 5. The valve body upper cover and the valve body lower cover together form a valve cavity. The valve is characterized by further including a pressure relief bypass pipe 4. The first valve core 2 divides the valve cavity into a first valve cavity and a second valve cavity, and a small hole 21 is provided on the first valve core to connect the first valve cavity and the second valve cavity. The inlet pipe and the outlet pipe are connected to the first valve cavity, and the first end of the pressure relief pipe opens into the second valve cavity. The pressure relief bypass pipe connects a first flow channel 41 and a second flow channel 42. The first flow channel connects to the first valve cavity, and the second flow channel connects to the pressure relief pipe. A second valve core 6 is disposed within the pressure relief bypass pipe, and the second valve core is used to open or close the first flow channel 41. The first valve core is made of silicone material.

[0027] The first valve core 2 includes a mounting part 22, an elastic valve 23, and a switch head 24, with a first return spring 25 provided between the switch head and the first end opening of the pressure relief pipe.

[0028] The first end opening of the pressure relief pipe has an annular flange 51, the inner ring wall of the annular flange is provided with a slope section 511, and the switch head 24 is provided with a conical body adapted to the slope section.

[0029] The elastic valve 23 includes a base 230 and a membrane 232, and the first return spring 25 presses against the base and the periphery of the annular flange respectively.

[0030] The membrane portion is an annular elastomer that arches toward the first valve cavity.

[0031] The inlet end pipe 11 of the water inlet pipe 1 faces the base 230, and the base 230 has a recessed cavity 231 directly opposite the inlet end pipe.

[0032] The central axis of the annular flange 51 is perpendicular to the central axis of the main section of the pressure relief pipe 5.

[0033] A pipe seal 40 is provided inside the pressure relief bypass pipe 4, and a second reset spring is provided between the pipe seal 40 and the second valve core 6.

[0034] The working principle of this invention is as follows: Water from the coffee machine's water tank enters the first valve chamber 101 through the inlet pipe 1. At this time, a small amount of water and air in the first valve chamber is discharged through the small hole 21, then through the second valve chamber 201 and the annular flange 51, and finally through the pressure relief pipe 5. When more water enters the first valve chamber, the water pressure pushes the elastic valve 23 to deform, and the switch head 24 moves downward to block the pressure relief pipe 5, allowing the water in the first valve chamber to be discharged through the outlet pipe 3. When the internal pressure of the coffee machine's water system is too high, exceeding the elastic deformation force of the second return spring, the water pressure pushes open the second valve core 6, and a portion of the water in the first valve chamber enters the pressure relief bypass pipe 4 through the first flow channel 41, then flows through the second flow channel 42 into the pressure relief pipe 5, thereby reducing the pressure of the water system.

[0035] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A pressure relief valve, comprising an upper valve body cover (10), a lower valve body cover (20), a first valve core (2), an inlet pipe (1), an outlet pipe (3), and a pressure relief pipe (5), wherein the upper valve body cover and the lower valve body cover together form a valve cavity, characterized in that: It also includes a pressure relief bypass pipe (4), a first valve core (2) dividing the valve chamber into a first valve chamber and a second valve chamber, and a small hole is provided on the first valve core to allow the first valve chamber and the second valve chamber to communicate; the inlet pipe and the outlet pipe are connected to the first valve chamber, and the first end of the pressure relief pipe opens into the second valve chamber; the pressure relief bypass pipe connects the first flow channel (41) and the second flow channel (42), the first flow channel is connected to the first valve chamber, the second flow channel is connected to the pressure relief pipe, and a second valve core (6) is provided in the pressure relief bypass pipe, the second valve core is used to open or close the first flow channel.

2. The pressure relief valve according to claim 1, characterized in that: The first valve core (2) includes a mounting part (22), an elastic valve (23), and a switch head (24), and a first return spring (25) is provided between the switch head and the first end opening of the pressure relief pipe.

3. The pressure relief valve according to claim 2, characterized in that: The first end opening of the pressure relief pipe has an annular flange (51), the inner ring wall of the annular flange is provided with a slope section (511), and the switch head (24) is provided with a cone-shaped body adapted to the slope section.

4. The pressure relief valve according to claim 3, characterized in that: The elastic valve (23) includes a base (230) and a membrane (232), and the first return spring (25) presses against the base and the periphery of the annular flange respectively.

5. The pressure relief valve according to claim 4, characterized in that: The membrane portion is an annular elastomer that arches toward the first valve cavity.

6. The pressure relief valve according to claim 5, characterized in that: The inlet end pipe (11) of the water inlet pipe (1) faces the base (230), and the base (230) has a recessed cavity (231) directly opposite the inlet end pipe.

7. The pressure relief valve according to claim 6, characterized in that: The central axis of the annular flange (51) is perpendicular to the central axis of the main section of the pressure relief pipe (5).

8. The pressure relief valve according to any one of claims 1 to 7, characterized in that: A pipe seal (40) is provided inside the pressure relief bypass pipe (4), and a second reset spring is provided between the pipe seal (40) and the second valve core (6).

Images