CN216715335U

CN216715335U - Pressure relief valve device and filtering system and beverage machine applying same

Info

Publication number: CN216715335U
Application number: CN202220051717.9U
Authority: CN
Inventors: 李宁; 吕宗权; 周祥勋
Original assignee: NINGBO AIJIA ELECTRICAL APPLIANCE CO Ltd
Current assignee: NINGBO AIJIA ELECTRICAL APPLIANCE CO Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-06-10
Anticipated expiration: 2032-01-05

Abstract

The utility model relates to a pressure relief valve device and a filtering system and a beverage machine applying the same, wherein the pressure relief valve device comprises: a main valve body having a first flow passage and a second flow passage; the main valve body is also provided with a pressure relief port, the pressure relief port is connected with a pressure relief joint with a pressure relief flow channel, the pressure relief flow channel comprises a first flow guide section and a second flow guide section, a necking is arranged at the position where the first flow guide section is connected with the second flow guide section and serves as a first flow through hole, the surface of the first flow through hole is provided with a first pressure relief groove, and a first pressure relief valve core is arranged at the first flow through hole; in a natural state, the first flow guide section and the second flow guide section of the pressure relief runner are at least communicated through the first pressure relief groove; when the first flow channel is in a fluid state, the first pressure relief valve core is abutted against the first flow passage opening and deforms under the action of fluid pressure to seal and block the first pressure relief groove. The pressure relief valve device is simple in structure, and compared with a pressure relief valve with a large number of parts in the prior art, the assembly process is simplified, and the production cost is reduced.

Description

Pressure relief valve device and filtering system and beverage machine applying same

Technical Field

The utility model relates to the technical field of control valves, in particular to a pressure relief valve device, a filtering system using the pressure relief valve device and a beverage machine.

Background

The pressure relief valve is commonly used in products such as water purifiers, direct drinking machines, coffee machines and the like or equipment such as water pumps with the pressure relief function. When the equipment runs for a period of time, the equipment stops working, and because the pressure of the first flow channel or the air inlet end of the equipment is too high, liquid or gas cannot be discharged quickly from the filter element group or the gas storage device or the water storage tank, the equipment needs to be additionally provided with a device capable of quickly closing the liquid or gas outlet end or the gas outlet end of the equipment, so that the liquid or gas is prevented from being released slowly due to the internal pressure of the filter element group or the gas storage device or the water storage tank. The conventional products in the market use the solenoid valve to control the closing of the water outlet end or the air outlet end, and the solenoid valve is high in cost and needs to be controlled by a PCB (printed Circuit Board). Taking a coffee machine product as an example, during brewing, a coffee bag is placed in a brewing cavity, water is pumped into a heating device through a water pump to be heated, hot water passes through the coffee bag in the brewing cavity to extract and brew powder in the coffee bag, and extracted beverage flows out of a water outlet of the brewing cavity for people to use. In order to obtain a good brewing effect, the coffee machine utilizes high-temperature and high-pressure extraction. However, after the coffee is boiled, the inside of the machine is still in a high-temperature and high-pressure state, and if the handle is directly opened at the moment, the machine is very dangerous, hot water is easy to spill out, and a user is scalded. The existing coffee machine mostly utilizes the electromagnetic valve to perform pressure relief on the coffee machine after the coffee machine is boiled, when the coffee machine is boiled, the electromagnetic valve in the machine is opened under the control of a program, and high-temperature and high-pressure hot water in the machine is emptied, so that the problems that the hot water is splashed out and the machine cannot be opened are solved.

Aiming at the problem of higher cost of the electromagnetic valve, the Chinese utility model patent with the application number of CN201420430201.0 (the authorized publication number is CN204042097U) discloses an automatic pressure relief valve, which comprises a valve body, an upper cover and a valve core assembly, wherein a valve cavity is arranged in the valve body, and the bottom of the valve body is provided with a pressure relief port and a water outlet which are communicated with the valve cavity; the upper cover is hermetically matched at the upper end of the valve cavity and is provided with a water inlet communicated with the valve cavity; the valve core assembly comprises a gasket, a valve core and a compression spring, wherein the upper part of the valve core is abutted against a water inlet hole, the lower part of the valve core is abutted against the compression spring, a gap is formed between the valve core and the inner peripheral wall of a valve cavity, the valve core always has the tendency of sealing the water inlet hole in a natural state, and under the state that a water inlet of an upper cover is filled with water, the gasket is forced by water pressure to push the valve core to compress the compression spring, so that the valve core moves downwards to seal a pressure relief opening.

However, the automatic pressure relief valve in the above patent still has certain disadvantages, and firstly, the structure of the automatic pressure relief valve is still relatively complex, involving many parts, and the assembly process is complicated, for example, it needs to set a valve plate matched with the valve core to ensure that the valve core can be effectively pushed to block the pressure relief opening under the action of water flow; secondly, because the case subassembly sets up in the water supply channel, in order to guarantee that the in-process case of intaking can be to the effective shutoff of pressure release mouth, so the volume of case generally can not be too little, and it can cause the influence to water supply channel's smooth and easy nature.

Therefore, further improvements are needed in the prior art pressure relief valves.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the utility model is to provide a pressure relief valve device which is simple in structure, convenient to assemble and low in cost, aiming at the current situation of the prior art.

A second technical problem to be solved by the present invention is to provide a filtering system using the above pressure relief valve device, in view of the current state of the art.

The third technical problem to be solved by the present invention is to provide a beverage machine using the above-mentioned filtering system, aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a pressure relief valve apparatus comprising:

the main valve body is provided with a first flow passage for fluid to enter and a second flow passage for fluid to discharge;

a pressure relief port is further arranged on the main valve body adjacent to the first flow channel, a pressure relief joint with a pressure relief flow channel is connected to the pressure relief port, the pressure relief flow channel comprises a first flow guide section and a second flow guide section which are sequentially communicated along the flow direction of pressure relief fluid, the first flow guide section is connected with the pressure relief port, a necking is arranged at the position where the first flow guide section is connected with the second flow guide section and serves as a first flow passing port, a first pressure relief groove communicated with the first flow guide section and the second flow guide section is formed in the surface of the first flow passing port, and a first pressure relief valve core used for opening or closing the first flow passing port is further arranged at the first flow passing port of the first pressure relief valve core;

in a natural state, the first flow guide section and the second flow guide section of the pressure relief flow passage are at least communicated through the first pressure relief groove;

when the first flow channel is in a fluid state, the first pressure relief valve core is abutted against the first flow passing port and deformed under the action of fluid pressure to block the first pressure relief groove.

In order to make first pressure release case can block up first pressure release recess when first flow passage leads to liquid or ventilate immediately, still include: the first elastic piece is arranged in the first flow guide section of the pressure relief flow channel and acts on the first pressure relief valve core, so that the first pressure relief valve core always has the tendency of abutting against the surface of the first flow passing port.

First pressure release case can adopt and to take place deformation when fluid pressure reaches the certain degree and resume various current flexible part (or elastic component) of original shape when the fluid pressure that receives is less than the certain degree, as the improvement, first pressure release case is the silica gel spare, first elastic component is first pressure spring, and this first pressure spring is located in the first water conservancy diversion section, and with the silica gel spare offsets.

In order to realize the function of the one-way valve and ensure that the pressure relief valve device keeps a certain fluid pressure (enough to provide pressure for enabling the first pressure relief valve core to generate deformation) at the pressure relief port, the main valve body is provided with a valve cavity communicated with the first flow passage and the second flow passage, a main valve core for controlling the on-off of water flow is further arranged in the valve cavity, a valve port is arranged at the position, close to the first flow passage, of the valve cavity, a second pressure spring is arranged in the valve cavity, the second pressure spring acts on the main valve core, and the main valve core moves towards the valve port to block the valve port.

In order to further improve the sensitivity of the first pressure relief valve core to deformation caused by fluid pressure, the pressure relief port of the main valve body is provided with a conical port, the conical port forms a second overflow port, and the surface of the second overflow port is provided with a second pressure relief groove for communicating a first flow guide section of the pressure relief flow channel with the first flow channel;

the relief valve device further includes:

the second pressure relief valve core is arranged at the pressure relief port and used for opening or closing the second overflowing port;

in a natural state, the first flow guide section of the pressure relief flow passage is communicated with the first flow passage at least through the second pressure relief groove;

and when the pressure relief joint is in a reverse fluid flowing state, the second pressure relief valve core is abutted against the second flow passage port and deformed under the action of fluid pressure to block the second pressure relief groove.

On the other hand, in a general situation, the fluid delivery system has at least two inlet flow paths, for example, one flow path may be communicated with the first flow path of the main valve body, and the other flow path may be communicated with the pressure relief joint, and in a fluid delivery process, a fluid may be delivered to a downstream through the first flow path and the pressure relief joint at the same time.

In order to further simplify the structure of the pressure relief valve device, a first pressure spring is arranged in a first flow guide section of the pressure relief flow passage, a first end of the first pressure spring abuts against the second pressure relief valve core, a second end of the first pressure spring abuts against the first pressure relief valve core, and under the action of the first pressure spring, the second pressure relief valve core always has a tendency of moving towards the second overflowing opening and abutting against the surface of the second overflowing opening.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: a filtering system applying the pressure relief valve device comprises:

a filter having a filter cavity and a fluid inlet and a fluid outlet in communication with the filter cavity;

the fluid outlet of the filter is in communication with the first flow passage of the main valve body of the pressure relief valve arrangement.

As an improvement thereof,

a first fluid delivery tube in communication with the fluid inlet of the filter;

and the first end of the second fluid conveying pipe is connected with the pressure relief joint, and the second end of the second fluid conveying pipe is communicated with the first fluid conveying pipe. The above structural design can return the pressure relief fluid to the upstream of the filter, thereby realizing the purpose of recycling.

In general, the second end of the second fluid conveying pipe and the first fluid conveying pipe can be directly communicated through a three-way joint, and in order to enable fluid to pass through a filter for filtering as much as possible (or all) in the fluid conveying process, the two pressure relief valve devices are respectively a first pressure relief valve device and a second pressure relief valve device;

a first flow passage of a main valve body of the first pressure relief valve device is communicated with a fluid outlet of the filter, and a pressure relief joint of the first pressure relief valve device is connected with a first end of the second fluid conveying pipe;

and a second flow passage of the second pressure relief valve device is communicated with the first fluid conveying pipe, and a pressure relief joint of the second pressure relief valve device is connected with a second end of the second fluid conveying pipe.

The technical scheme adopted by the utility model for solving the third technical problem is as follows: a beverage machine comprises the filtering system.

Compared with the prior art, the utility model has the advantages that: be equipped with the first pressure release case that can take place deformation under the fluid pressure effect in the pressure release runner of relief valve device pressure release joint, when equipment during operation, first pressure release case takes place deformation and plugs up the first pressure release recess of the mouth that flows through of pressure release runner under the fluid pressure (hydraulic pressure or atmospheric pressure) effect, avoided appearing leaking in fluid transportation process, when equipment stop work, when fluid pressure in the pressure release runner is less than the pressure that makes silica gel deformation can seal the recess, the fluid begins the pressure release through above-mentioned first pressure release recess, it can slow release to have guaranteed that equipment memory pressure. The pressure release valve device is simple in structure, and compared with the pressure release valve structure with a large number of parts in the prior art, the pressure release valve device simplifies the assembly process and reduces the production cost. On the other hand, in the fluid conveying process, the fluid is directly conveyed through the first flow channel and the second flow channel of the main valve body, and the fluid is independent of the pressure relief flow channel for arranging the first pressure relief valve core, so that the flow channel space of the main valve body is not occupied, and the smoothness of fluid conveying is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a relief valve device according to an embodiment of the present invention (provided with only a first relief valve core);

fig. 2 is a schematic structural diagram of another pressure relief valve device according to an embodiment of the present invention (provided with a first pressure relief valve core and a second pressure relief valve core);

FIG. 3 is a schematic view of an internal structure of a pressure relief fitting according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a filtration system according to example 1 of the present invention;

fig. 5 is a schematic structural view of a filtration system according to embodiment 2 of the present invention (the relief valve device is provided with only a first relief valve element);

fig. 6 is a schematic structural view of a filtration system according to embodiment 2 of the present invention (a relief valve device is provided with a first relief valve element and a second relief valve element);

FIG. 7 is a schematic structural view of a filtration system according to example 3 of the present invention;

FIG. 8 is a schematic structural view of a filtration system according to example 4 of the present invention;

FIG. 9 is a schematic structural view of a filtration system according to example 5 of the present invention

Fig. 10 is a schematic structural view of a filtration system according to embodiment 6 of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Referring to fig. 1 to 3, a relief valve device includes a main valve body 10, a main valve element 14, a second compression spring 19, a relief joint 16, a first relief valve element 171, and a first elastic member 18.

The main valve body 10 has a first flow passage 11 for the inflow of fluid, a second flow passage 12 for the outflow of fluid, and a valve chamber 13 communicating the first flow passage 11 and the second flow passage 12.

Main valve core 14 is made of silicone, and is disposed in valve cavity 13 of main valve body 10 and opposite to the valve port of valve cavity 13, wherein the valve port of valve cavity 13 is disposed adjacent to first flow channel 11 and is communicated with first flow channel 11. A second compression spring 19 is further arranged in the valve cavity 13, one end of the second compression spring 19 abuts against the main valve element 14, and the other end of the second compression spring abuts against the inner wall (adjacent to the second flow passage 12) of the valve cavity 13, so that the main valve element 14 moves towards the valve port and the valve port is blocked. The main valve body 10, the main valve element 14 and the second pressure spring 19 of this embodiment realize the function of a check valve (allowing fluid to pass through from the first flow passage 11 to the second flow passage 12 in one direction), and ensure that the relief valve device maintains a certain fluid pressure (sufficient to provide a pressure for deforming the first relief valve element 171) at the relief port 15.

In order to facilitate assembly of the main valve element 14 and the second compression spring 19, the main valve body 10 of the present embodiment includes a first valve body 101 and a second valve body 102 that are detachably engaged with each other, and the first valve body 101 and the second valve body 102 are engaged with each other to define the valve chamber 13.

A pressure relief port 15 communicated with the first flow passage 11 is further arranged on the main valve body 10 and is adjacent to the first flow passage 11. A pressure relief fitting 16 is connected to a pressure relief port 15 of main valve body 10. The pressure relief connector 16 has a pressure relief flow passage 160, and the pressure relief flow passage 160 includes a first flow guiding section 161 and a second flow guiding section 162 sequentially communicated in a flow direction of the pressure relief fluid, wherein the first flow guiding section 161 of the pressure relief flow passage 160 is connected to the pressure relief port 15. The "flow direction of the relief fluid" refers to a direction in which the fluid in the first flow path 11 of the main valve body 10 flows out from the relief port 15 into the relief flow path 160 and flows to the outside through the relief flow path 160.

The pressure relief joint 16 is connected with the pressure relief port 15 of the main valve body 10 through threads, and a sealing ring 2 is further arranged at the connection position of the pressure relief joint and the main valve body.

The pressure relief flow passage 160 has a first flow passage 163 formed by a connection between the first flow guide section 161 and the second flow guide section 162, and the first flow passage 163 is a tapered opening with a gradually reduced diameter from the first flow guide section 161 to the second flow guide section 162. The surface of the first flow-through opening 163 is provided with a first pressure relief groove 164 communicating the first flow-guiding section 161 and the second flow-guiding section 162, and a plurality of first pressure relief grooves 164 may be arranged and distributed at intervals along the circumference of the first flow-through opening 163.

The first pressure relief valve core 171 is disposed at the first flow port 163, and is a silicone member that can deform under the action of external pressure, and the first pressure relief valve core 171 of this embodiment is of a spherical structure. In order to immediately block the first relief groove 164 when the first flow path 11 is switched to a fluid flowing state (fluid flowing state or air flowing state), the first flow guide section 161 of the relief flow path 160 is further provided with a first elastic element 18, and the first elastic element 18 may be a first pressure spring which abuts against the first relief valve core 171, so that the first relief valve core 171 always tends to abut against the surface of the first flow passage opening 163. In a natural state, the first relief valve core 171 abuts against the first flow port 163, but the first flow guiding section 161 and the second flow guiding section 162 of the relief flow passage 160 can be communicated through the first relief groove 164, so as to achieve relief. When the first flow channel 11 of the main valve body 10 is in a fluid-passing state (i.e. the device connected to the pressure relief valve device is in a working state of supplying liquid or supplying gas), the first pressure relief valve core 171 not only can block the main flow channel opening of the first flow port 163, but also the first pressure relief valve core 171 deforms under the action of the fluid pressure, and blocks the first pressure relief groove 164 formed on the surface of the first flow port 163, thereby avoiding the fluid leakage problem.

In a preferred embodiment, the pressure relief port 15 of the main valve body 10 is provided as a tapered port, which constitutes the second flow port 150, and the second flow port 150 is provided with the second pressure relief valve spool 172. The surface of the second flow port 150 is provided with a first flow guide section 161 for communicating the pressure relief flow passage 160 with a second pressure relief groove 151 of the first flow passage 11, and the second pressure relief groove 151 may be provided with a plurality of pressure relief grooves and distributed at intervals along the circumferential direction of the second flow port 150. Specifically, in order to further simplify the structure of the relief valve device, the first end of the first pressure spring abuts against the second relief valve body 172, and the second end abuts against the first relief valve body 171, and the second relief valve body 172 always tends to move toward the second flow port 150 and to abut against the surface of the second flow port 150 by the first pressure spring, and in a natural state, the second relief valve body 172 abuts only against the surface of the second flow port 150, but the first guide portion 161 of the relief flow passage 160 communicates with the first flow passage 11 at least through the second relief groove 151. And under the state that the pressure relief joint 16 is reversely communicated with the fluid, the second pressure relief valve core 172 can seal and block the main flow passage opening of the second flow passage opening 150, and the second pressure relief valve core 172 is deformed under the action of the fluid pressure and seals and blocks the second pressure relief groove 151 formed in the surface of the second flow passage opening 150, so that the problem of fluid leakage at the position is avoided. The above-mentioned "relief joint 16 is in a reverse flow state" refers to a case where relief joint 16 serves as a single intake flow path or an intake flow path, and allows a fluid to flow into first flow path 11 of main valve body 10.

In general, there are at least two inlet flow paths in the fluid delivery system, for example, one flow path may communicate with the first flow path 11 of the main valve body 10, and the other flow path may communicate with the pressure relief joint 16, during the fluid delivery process, the fluid may be delivered to the downstream through the first flow path 11 and the pressure relief joint 16 at the same time, but in some cases, the fluid needs to be delivered through only one flow path, and the second pressure relief valve element 172 is provided to ensure that the flow path in the direction from the pressure relief flow path 160 to the first flow path 11 of the main valve body 10 is effectively cut off, which will be described in detail below with reference to the filtration system.

The embodiment also relates to a filtering system applying the pressure relief valve device and a beverage machine applying the filtering system, wherein the beverage machine can be a coffee machine, a direct drinking machine or a water purifier product.

Examples 1,

Referring to fig. 4, the present embodiment discloses a filtering system applying the above-mentioned pressure relief valve device, and the filtering system includes a filter 20, a first fluid delivery pipe 31, a second fluid delivery pipe 32, and a third fluid delivery pipe 33.

The filter 20 has a filter chamber 23 and a fluid inlet 21 and a fluid outlet 22 communicating with the filter chamber 23. The fluid inlet 21 of the filter 20 communicates with the first fluid delivery pipe 31 and the fluid outlet 22 of the filter 20 communicates with the first flow path 11 of the main valve body 10 of the pressure relief valve arrangement. A second fluid transfer line 32 is connected to the pressure relief fitting 16 for passing leaked fluid to a storage tank (which may be to a gas reservoir or to the outside atmosphere if the fluid is a gas). The third fluid delivery tube 33 is connected to the outlet of the second flow passage 12 of the pressure relief valve arrangement to carry the fluid (liquid or gas) passing through the filter 20 downstream.

Examples 2,

Referring to fig. 5 and 6, the filtering system of the present embodiment is different from embodiment 1 in that:

the first end of the second fluid delivery pipe 32 is connected to the pressure relief joint 16 of the pressure relief valve device, and the second end is communicated with the first fluid delivery pipe 31 through the three-way joint 40, so that the pressure relief fluid can be returned to the upstream of the filter 20, and the purpose of recycling can be achieved.

The relief valve device of the filtration system in fig. 5 is provided with only the first relief valve element 171 and the main valve element 14. The relief valve device of the filtration system of fig. 6 is provided with a first relief valve spool 171, a second relief valve spool 172 and a main valve spool 14.

Examples 3,

Referring to fig. 7, the filtering system of the present embodiment is different from the filtering system of fig. 5 of embodiment 2 in that: the three-way joint 40 in fig. 5 is omitted, and instead of the pressure relief valve device, specifically, two pressure relief valve devices are provided, namely, a first pressure relief valve device and a second pressure relief valve device. The first flow passage 11 of the main valve body 10 of the first pressure relief valve device is communicated with the fluid outlet 22 of the filter 20, the pressure relief joint 16 of the first pressure relief valve device is connected with the first end of the second fluid delivery pipe 32, the second flow passage 12 of the second pressure relief valve device is communicated with the first fluid delivery pipe 31, and the pressure relief joint 16 of the second pressure relief valve device is connected with the second end of the second fluid delivery pipe 32.

Of these, only shown in fig. 7 are: the first relief valve device is only provided with a first relief valve core 171 and a main valve core 14; it is needless to say that the first relief valve device of the present embodiment may be provided with a first relief valve spool 171, a main valve spool 14, and a second relief valve spool 172. The second relief valve device is provided with only the first relief valve spool 171, and the second relief valve spool 172 and the main valve spool 14 are omitted.

Examples 4,

Referring to fig. 8, the filtering system of the present embodiment is different from the filtering system of fig. 6 of embodiment 2 in that: the three-way connection 40 in fig. 5 is omitted and instead a one-way valve 60 for one-way entry of fluid into the filter chamber 23 of the filter 20 is provided, wherein the one-way valve 60 has two inlet connections 61 and an outlet connection 62, wherein one inlet connection 61 is connected to the second end of the second fluid duct 32 and the outlet connection 62 is connected to the first fluid duct 31.

Examples 5,

Referring to fig. 9, the filtering system of the present embodiment is different from the filtering system of fig. 6 of embodiment 2 in that: the three-way joint 40 in fig. 5 is omitted and replaced by a pressure relief valve device. Specifically, the pressure relief valve device in this embodiment has two, respectively, a first pressure relief valve device and a second pressure relief valve device. The first flow passage 11 of the main valve body 10 of the first pressure relief valve device is communicated with the fluid outlet 22 of the filter 20, the pressure relief joint 16 of the first pressure relief valve device is connected with the first end of the second fluid delivery pipe 32, the second flow passage 12 of the second pressure relief valve device is communicated with the first fluid delivery pipe 31, and the pressure relief joint 16 of the second pressure relief valve device is connected with the second end of the second fluid delivery pipe 32.

Among these, fig. 8 shows: the first pressure relief valve device is provided with a first pressure relief valve core 171, a second pressure relief valve core 172 and a main valve core 14; it is needless to say that only the first relief valve spool 171 and the main valve spool 14 may be provided in the first relief valve device of the present embodiment. The second relief valve device is provided with only the first relief spool 171 and the main spool 14, and the second relief spool 172 is omitted.

Examples 6,

Referring to fig. 10, the filtering system of the present embodiment is different from the filtering system of fig. 6 of embodiment 2 in that: the three-way joint 40 in fig. 5 is omitted and replaced by a pressure relief valve device. Specifically, the pressure relief valve device in this embodiment has two, respectively, a first pressure relief valve device and a second pressure relief valve device. The first flow passage 11 of the main valve body 10 of the first pressure relief valve device is communicated with the fluid outlet 22 of the filter 20, the pressure relief joint 16 of the first pressure relief valve device is connected with the first end of the second fluid delivery pipe 32, the second flow passage 12 of the second pressure relief valve device is communicated with the first fluid delivery pipe 31, and the pressure relief joint 16 of the second pressure relief valve device is connected with the second end of the second fluid delivery pipe 32.

Among these, fig. 8 shows: the first relief valve device is provided with a first relief valve spool 171, a second relief valve spool 172, and a main valve spool 14. The second relief valve device is also provided with a first relief valve spool 171, a second relief valve spool 172, and a main valve spool 14.

Claims

1. A pressure relief valve apparatus comprising:

a main valve body (10) having a first flow passage (11) for the fluid to enter and a second flow passage (12) for the fluid to exit;

the method is characterized in that: a pressure relief port (15) is also arranged on the main valve body (10) near the first flow passage (11), the pressure relief port (15) is connected with a pressure relief joint (16) with a pressure relief flow passage (160), the pressure relief flow passage (160) comprises a first flow guide section (161) and a second flow guide section (162) which are sequentially communicated along the flow direction of the pressure relief fluid, the first flow guide section (161) is connected with the pressure relief port (15), a necking is arranged at the connecting position of the first flow guide section (161) and the second flow guide section (162) and is used as a first flow passing port (163), the surface of the first flow-through opening (163) is provided with a first pressure relief groove (164) which is communicated with the first flow guide section (161) and the second flow guide section (162), a first pressure relief valve core (171) used for opening or closing the first flow through port (163) is further arranged at the first flow through port (163) of the first pressure relief valve core (171);

in a natural state, the first flow guide section (161) and the second flow guide section (162) of the pressure relief flow passage (160) are at least communicated through the first pressure relief groove (164);

when the first flow channel (11) is in a fluid state, the first pressure relief valve core (171) abuts against the first flow passing port (163) and deforms under the action of fluid pressure to block the first pressure relief groove (164).

2. The pressure relief valve apparatus according to claim 1, characterized by further comprising:

and a first elastic member (18) which is arranged in the first flow guide section (161) of the pressure relief flow passage (160) and acts on the first pressure relief valve core (171), so that the first pressure relief valve core (171) always tends to be abutted against the surface of the first flow passing port (163).

3. The pressure relief valve apparatus according to claim 2, wherein: the first pressure relief valve core (171) is a silica gel piece, the first elastic piece (18) is a first pressure spring, and the first pressure spring is arranged in the first flow guide section (161) and is abutted to the silica gel piece.

4. The pressure relief valve device according to any one of claims 1 to 3, characterized in that: the main valve body (10) is provided with a valve cavity (13) communicated with the first flow passage (11) and the second flow passage (12), a main valve core (14) used for controlling the on-off of water flow is further arranged in the valve cavity (13), a valve port is arranged at the position, close to the first flow passage (11), of the valve cavity (13), a second pressure spring (19) is arranged in the valve cavity (13), the second pressure spring (19) acts on the main valve core (14), and the main valve core (14) moves towards the valve port to seal the valve port.

5. The pressure relief valve device according to any one of claims 1 to 3, characterized in that:

the pressure relief port (15) of the main valve body (10) is provided with a conical opening which forms a second overflowing opening (150), and the surface of the second overflowing opening (150) is provided with a first flow guide section (161) used for communicating the pressure relief flow passage (160) and a second pressure relief groove (151) of the first flow passage (11);

the relief valve device further includes:

the second pressure relief valve core (172) is arranged at the pressure relief port (15) and is used for opening or closing the second flow passing port (150);

in a natural state, a first flow guide section (161) of the pressure relief flow passage (160) is communicated with the first flow passage (11) at least through the second pressure relief groove (151);

when the pressure relief connector (16) is in a reverse fluid communication state, the second pressure relief valve core (172) is abutted against the second flow passing port (150) and deforms under the action of fluid pressure to seal the second pressure relief groove (151).

6. The pressure relief valve apparatus of claim 5, wherein: and a first pressure spring is arranged in a first flow guide section (161) of the pressure relief flow passage (160), a first end of the first pressure spring is abutted against the second pressure relief valve core (172), a second end of the first pressure spring is abutted against the first pressure relief valve core (171), and under the action of the first pressure spring, the second pressure relief valve core (172) always has a tendency of moving towards the second overflowing opening (150) and abutting against the surface of the second overflowing opening (150).

7. A filter system using the pressure relief valve device according to any one of claims 1 to 6, characterized by comprising:

a filter (20) having a filter chamber (23) and a fluid inlet (21) and a fluid outlet (22) communicating with the filter chamber (23);

the fluid outlet (22) of the filter (20) is in communication with the first flow passage (11) of the main valve body (10) of the pressure relief valve arrangement.

8. The filtration system of claim 7, further comprising:

a first fluid delivery tube (31) in communication with the fluid inlet (21) of the filter (20);

and a second fluid delivery pipe (32), wherein the first end of the second fluid delivery pipe is connected with the pressure relief joint (16), and the second end of the second fluid delivery pipe is communicated with the first fluid delivery pipe (31).

9. The filtration system of claim 8, wherein: the two pressure relief valve devices are respectively a first pressure relief valve device and a second pressure relief valve device;

a first flow passage (11) of a main valve body (10) of the first pressure relief valve device is communicated with a fluid outlet (22) of the filter (20), and a pressure relief joint (16) of the first pressure relief valve device is connected with a first end of the second fluid conveying pipe (32);

and a second flow passage (12) of the second pressure relief valve device is communicated with the first fluid conveying pipe (31), and a pressure relief joint (16) of the second pressure relief valve device is connected with a second end of the second fluid conveying pipe (32).

10. A beverage machine, its characterized in that: comprising a filtration system according to any one of claims 7 to 9.