Pressure relief assembly and coffee machine

Abstract

The pressure relief assembly comprises a valve body, a first sealing ring, a valve rod and an elastic piece, a valve cavity is formed in the valve body, the valve body is provided with a liquid inlet, a pressure relief opening and an operation opening, the liquid inlet, the pressure relief opening and the operation opening communicate with the valve cavity, a bearing part is arranged in the valve cavity, the first sealing ring is arranged on the bearing part, the valve rod is arranged in the valve body, and the elastic piece is arranged on the valve rod. One end of the valve rod abuts against the first sealing ring, the other end of the valve rod extends out of the valve body along the operation opening, a gap is formed between the valve rod and the bearing part, the pressure relief opening is communicated with the gap, and the elastic piece is arranged in the valve cavity and connected with the valve rod so that the valve rod can abut against the first sealing ring. Pressure relief can be performed when the pressure in the brewing assembly is too large or water flow converges into the valve cavity, and safe operation of the coffee machine is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coffee machines, in particular to a pressure relief assembly and a coffee machine. BACKGROUND

[0002] In the existing pressure type coffee machine, during the extraction of coffee, the high-pressure water flow penetrates the tightly packed coffee powder layer in the capsule, and the water with higher pressure can further extract the non-water-soluble substances, so as to completely emulsify the lipids inside the coffee, and then extract the espresso. After the coffee is made, a certain amount of steam pressure remains in the machine. Under the action of the steam pressure, it is difficult to open the handle of the brewing assembly, and a large resistance needs to be overcome. In addition, the residual water in the coffee bag will also flow to the outside under the action of pressure, thereby causing the residual water to be squeezed out along the pipeline. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art.

[0004] The first aspect of the present application provides a pressure relief assembly, which comprises a valve body, a first sealing ring, a valve rod and an elastic piece, the valve body is provided with a valve cavity, the valve body has a liquid inlet, a pressure relief port and an operation port, the liquid inlet, the pressure relief port and the operation port are communicated with the valve cavity respectively; the valve cavity is provided with a receiving part, and the first sealing ring is arranged on the receiving part; the valve rod is arranged in the valve body, one end of the valve rod abuts against the first sealing ring, and the other end of the valve rod extends out of the valve body along the operation port, there is a gap between the valve rod and the receiving part, and the pressure relief port is communicated with the gap; the elastic piece is arranged in the valve cavity and connected with the valve rod, so that the valve rod abuts tightly against the first sealing ring.

[0005] The pressure relief assembly provided by the present application has at least the following beneficial effects: when the pressure in the brewing assembly is too high or the water flow is injected into the valve cavity, the valve rod can be pressed upward, the valve rod moves upward to compress the elastic piece, so that the first sealing ring and the valve rod are separated to form a gap, the water vapor accumulated in the valve cavity flows out along the gap, then flows to the pressure relief port along the gap between the valve rod and the receiving part, and finally flows out of the valve body, so as to achieve the purpose of pressure relief. After the valve rod is released, the valve rod is reset under the action of the elastic piece, re-abuts against the first sealing ring, and the sealing state is restored.

[0006] According to some technical solutions of the present application, one end of the elastic piece abuts against the end face of the valve rod, and the other end of the elastic piece abuts against the inner wall of the valve cavity.

[0007] According to some technical solutions of the present application, the end face of the valve rod is provided with a boss, and one end of the elastic piece is arranged outside the boss.

[0008] According to some technical solutions of the present application, a groove is arranged on the outer side of the valve rod in the circumferential direction, the groove is arranged below the pressure relief port, and a second sealing ring is arranged on the groove.

[0009] According to some technical solutions of the present application, a connecting groove for connecting with a fixing member is arranged on the outer side of the valve body.

[0010] According to some technical solutions of the present application, the valve rod comprises an inclined portion arranged below the first sealing ring, and the inclined portion is arranged in the radial direction of the valve rod to form the gap.

[0011] According to some technical solutions of the present application, the valve body comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are connected, and the inner diameter of one end of the upper valve body close to the lower valve body is smaller than the inner diameter of the lower valve body.

[0012] According to some technical solutions of the present application, one end of the upper valve body is provided with an external thread, one end of the lower valve body is provided with an internal thread, and the internal thread and the external thread are matched.

[0013] According to some technical solutions of the present application, a third sealing ring is arranged on the internal thread, and the third sealing ring is arranged between the upper valve body and the lower valve body.

[0014] The second aspect of the present application provides a coffee machine comprising a brewing assembly, and further comprising the pressure relief assembly according to the above technical solutions, and the liquid inlet of the pressure relief assembly is connected with the brewing assembly.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structural schematic view of the pressure relief assembly provided by the embodiment of the present application is shown in the figure;

[0017] Figure 2 A front view of the pressure relief assembly provided by the embodiment of the present application is shown in the figure;

[0018] Figure 3 A partial cross-sectional view of the pressure relief assembly provided by the embodiment of the present application is shown in the figure;

[0019] Figure 4 Another structural schematic view of the pressure relief assembly provided by the embodiment of the present application is shown in the figure;

[0020] Figure 5 A structural schematic view of a coffee machine provided by the embodiment of the present application is shown in the figure;

[0021] Figure 6 A structural schematic view of a coffee machine provided by the embodiment of the present application is shown in the figure;Figure 5 A local enlarged view of the middle A;

[0022] Figure 7 Another structure schematic view of a coffee machine provided by the embodiment of the present application.

[0023] In the drawings: 100-valve body; 200-valve rod; 300-elastic member; 400-first sealing ring; 500-second sealing ring; 600-third sealing ring; 700-fixing member; 800-button; 101-valve cavity; 102-liquid inlet; 103-pressure relief port; 104-operation port; 105-accepting part; 106-connecting groove; 210-convex; 220-inclined part; 110-upper valve body; 120-lower valve body. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are only used to explain the present application, and cannot be understood as a limitation to the present application.

[0025] In the description of the present application, it is understood that the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In relation to the orientation description, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0026] In order to help understand the present application, specific embodiments of the present application will now be described by examples and with reference to the drawings, that is Figures 1 to 7

[0027] Referring to Figures 1 to 4 , the present application provides a pressure relief assembly, which comprises a valve body 100, a first sealing ring 400, a valve rod 200 and an elastic member 300, the valve body 100 is provided with a valve cavity 101, the valve body 100 has a liquid inlet 102, a pressure relief port 103 and an operation port 104, the liquid inlet 102, the pressure relief port 103 and the operation port 104 are communicated with the valve cavity 101 respectively.

[0028] ​The valve cavity 101 is provided with a receiving portion 105, and the first sealing ring 400 is arranged on the receiving portion 105.

[0029] The valve stem 200 is arranged in the valve body 100, one end of the valve stem 200 abuts against the first sealing ring 400, and the other end extends out of the valve body 100 along the operation port 104. A gap is formed between the valve stem 200 and the receiving portion 105, the pressure relief port 103 is in communication with the gap, and the pressure relief port 103 is arranged below the receiving portion 105. Additionally or alternatively, the valve stem 200 comprises an inclined portion 220 arranged below the first sealing ring 400, and the length direction of the valve stem 200 is the radial direction. The inclined portion 220 is arranged to be inclined along the radial direction of the valve stem 200 to form the gap.

[0030] The elastic member 300 is arranged in the valve cavity 101 and connected with the valve stem 200, so that the valve stem 200 abuts against the first sealing ring 400 under the action of the elastic member to form a sealed inner cavity.

[0031] Therefore, when the pressure in the brewing assembly is too high or water flows into the valve cavity 101, the valve stem 200 can be pressed upward, the valve stem 200 moves upward to compress the elastic member 300, so that the first sealing ring 400 and the valve stem 200 are separated to form a gap, and the accumulated water vapor in the valve cavity 101 flows out along the gap, then flows along the gap between the valve stem 200 and the receiving portion 105 to the pressure relief port 103, and finally flows out of the valve body 100, so as to achieve the purpose of pressure relief. After the valve stem 200 is released, the valve stem 200 is reset under the action of the elastic member 300, and abuts against the first sealing ring 400 again to restore the sealing state.

[0032] After the pressure relief operation is performed, the steam pressure in the coffee machine gradually decreases until it reaches or approaches equilibrium with the external atmospheric pressure. At this time, the handle is no longer hindered by the pressure difference, and only needs to overcome the small resistance of the handle itself to easily open the handle.

[0033] In some embodiments, the valve body 100 comprises an upper valve body 110 and a lower valve body 120, the upper valve body 110 and the lower valve body 120 are connected, and the inner diameter of one end of the upper valve body 110 close to the lower valve body 120 is smaller than the inner diameter of the lower valve body 120. Further, one end of the upper valve body 110 is provided with external threads, and one end of the lower valve body 120 is provided with internal threads, and the internal threads and the external threads are matched.

[0034] In use, the outer thread of the upper valve body 110 is screwed with the inner thread of the lower valve body 120 to connect the upper valve body 110 and the lower valve body 120, forming a complete valve cavity 101. Further, in order to enhance the sealing performance of the upper valve body 110 and the lower valve body 120 after being connected, a third sealing ring 600 is arranged on the inner thread, and the third sealing ring 600 is arranged between the upper valve body 110 and the lower valve body 120 to prevent water vapor in the valve cavity 101 from leaking from the connection, further enhancing the sealing performance of the entire pressure relief assembly.

[0035] Optionally, in some specific embodiments, one end of the elastic member 300 abuts against the end surface of the valve rod 200, and the other end of the elastic member 300 abuts against the inner wall of the valve cavity 101. For example, the elastic member 300 is a spring, and in the normal state, the elastic force of the spring makes the valve rod 200 abut tightly against the first sealing ring 400, and at the same time, when the valve rod 200 is pressed, the spring can be smoothly compressed to achieve the pressure relief function. Therefore, it can be ensured that the spring effectively applies the elastic force to the valve rod 200, so that the valve rod 200 can abut tightly against the first sealing ring 400 in the normal state and when being reset, and the sealing effect is guaranteed.

[0036] During the compression and expansion of the elastic member 300, the elastic member 300 is prone to deviation or distortion, which may cause uneven force on the valve rod 200, and further affect the sealing effect. Therefore, in some embodiments, the end surface of the valve rod 200 is provided with a boss 210, and one end of the elastic member 300 is arranged outside the boss 210. The boss 210 guides the elastic member 300, and during the up and down movement of the valve rod 200, the boss 210 can limit the position of the elastic member 300 to accurately achieve the compression and expansion actions, prevent the elastic member 300 from deviating to one side, and further ensure the working stability of the elastic member 300.

[0037] During the pressure relief, if there is a gap between the valve rod 200 and the bottom of the valve body 100, water vapor may leak along the operation port 104. Therefore, in some embodiments, a groove is arranged on the outer side of the valve rod 200 in the circumferential direction, and the groove is arranged below the pressure relief port 103. The second sealing ring 500 is installed on the groove, and after the valve rod 200 is assembled, the second sealing ring 500 tightly abuts against the inner wall of the valve body 100, further improving the sealing effect of the bottom of the valve body 100.

[0038] In yet some embodiments, the outer side of the valve body 100 is provided with a connecting groove 106 for connecting with a fixing member 700. The connecting groove 106 can be connected with the fixing member 700, and the fixing member 700 is connected with the connecting groove 106 by clamping or screwing, and the pressure relief assembly is fixed at the corresponding position of the coffee machine. Figure 4 The arc-shaped part of the fixing member 700 is arranged around the connecting groove 106, and the connecting hole 701 is arranged on the arc-shaped part to be connected with the connecting hole 701 by using a bolt. By connecting the connecting groove 106 with the fixing member 700, and by clamping or screwing, the pressure relief assembly is fixed at the corresponding position of the coffee machine.

[0039] Figure 5 The installation position of the pressure relief assembly in a coffee machine is shown, Figure 7 The installation position of the pressure relief assembly on another model of coffee machine is shown, by installing the pressure relief assembly in different positions on the coffee machine, it can be easily connected with brewing assemblies of different models. That is, by using the bolt, the fixed part 700 is connected and matched with the connecting groove 106, so that the pressure relief assembly can adapt to the installation requirements of different models of coffee machines, and the cost of customized design is reduced.

[0040] Continuing to refer to Figures 5 to 7 The application also provides a coffee machine, which comprises a brewing assembly, and further comprises the pressure relief assembly as described above, and the liquid inlet 102 of the pressure relief assembly is connected with the brewing assembly. Specifically, a three-way valve is arranged on the water inlet channel of the brewing assembly, and the three-way valve is connected with the brewing assembly, the water inlet pipe and the pressure relief assembly respectively. When the water in the brewing assembly backflows into the valve cavity 101 due to the pressure in the coffee machine, the water in the valve cavity 101 can be discharged by pressing the valve needle, and the residual pressure is relieved.

[0041] In actual installation, the pressure relief port 103 can be connected with a waste water box, so that the water vapor is discharged outward from the pressure relief port 103, achieving the purpose of pressure relief. The bottom of the valve rod 200 can be connected with a button, so that the user can more easily control the force when operating the button, and can more accurately transmit the force to the valve rod 200, achieving accurate control of the action of the valve rod 200, and then more accurately adjusting the pressure relief process. Therefore, pressure relief can be performed when the pressure in the brewing assembly is too large or the water flow flows into the valve cavity, ensuring the safe operation of the coffee machine.

[0042] In addition, certain terms have been used in this specification to describe embodiments of the specification. For example, "one embodiment", "an embodiment" and / or "some embodiments" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. Therefore, it can be emphasized and should be understood that two or more references to "embodiments" or "one embodiment" in various parts of the specification do not necessarily all refer to the same embodiment. In addition, a particular feature, structure or characteristic can be appropriately combined in one or more embodiments of the specification.

[0043] The preferred embodiments of the application are specifically described above, but the application is not limited to the described embodiments, and those skilled in the art can make equivalent modifications or alternative arrangements to realize the application in the specification according to the embodiments in the specification, and these equivalent modifications or alternatives are all included in the scope defined by the claims of the application.

Claims

1. A pressure relief assembly, characterized by: The utility model relates to a valve, comprising: a valve body (100) provided with a valve cavity (101) in the valve body (100), the valve body (100) has a liquid inlet (102), a pressure relief port (103) and an operating port (104), the liquid inlet (102), the pressure relief port (103) and the operating port (104) are communicated with the valve cavity (101) respectively; a first sealing ring (400) is arranged on a receiving part (105) in the valve cavity (101); a valve rod (200) is arranged in the valve body (100), one end of the valve rod (200) abuts against the first sealing ring (400), the other end of the valve rod (200) extends out of the valve body (100) along the operating port (104), a gap is formed between the valve rod (200) and the receiving part (105), and the pressure relief port (103) is communicated with the gap; an elastic member (300) is arranged in the valve cavity (101) and connected with the valve rod (200) to make the valve rod (200) abut tightly against the first sealing ring (400).

2. The pressure relief assembly of claim 1, wherein: One end of the elastic member (300) abuts against an end face of the valve rod (200), and the other end of the elastic member (300) abuts against an inner wall of the valve cavity (101).

3. The pressure relief assembly of claim 2, wherein: The end face of the valve rod (200) is provided with a boss (210), and one end of the elastic member (300) is arranged outside the boss (210).

4. The pressure relief assembly of claim 1, wherein: A groove is arranged on the outer side of the valve rod (200) along the circumferential direction of the valve rod (200), the groove is arranged below the pressure relief port (103), and a second sealing ring (500) is arranged on the groove.

5. The pressure relief assembly of claim 1, wherein: A connecting groove (106) is arranged on the outer side of the valve body (100) and used for connecting with a fixing member (700).

6. The pressure relief assembly of claim 1, wherein: The valve rod (200) comprises an inclined part (220), the inclined part (220) is arranged below the first sealing ring (400), and the inclined part (220) is arranged obliquely along the radial direction of the valve rod (200) to form the gap.

7. The pressure relief assembly of claim 1, wherein: The valve body (100) comprises an upper valve body (110) and a lower valve body (120), the upper valve body (110) and the lower valve body (120) are connected, and the inner diameter of one end of the upper valve body (110) close to the lower valve body (120) is smaller than the inner diameter of the lower valve body (120).

8. The pressure relief assembly of claim 7, wherein: One end of the upper valve body (110) is provided with external threads, one end of the lower valve body (120) is provided with internal threads, and the internal threads and the external threads are matched.

9. The pressure relief assembly of claim 8, wherein: A third sealing ring (600) is arranged on the internal threads, and the third sealing ring (600) is arranged between the upper valve body (110) and the lower valve body (120).

10. A coffee maker characterized in that: The utility model relates to a brewing assembly, further comprising a pressure relief assembly as claimed in any one of claims 1-9, and the liquid inlet (102) of the pressure relief assembly is connected with the brewing assembly.

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