Integrated valve structure and beverage preparation machine

Abstract

The utility model discloses an integrated valve structure which comprises a main body, a first channel, a second channel, a fluid channel, an air inlet channel and a pressure relief channel are arranged in the main body, the inlet end of the air inlet channel is provided with an air inlet communicated with the outside, one end of the fluid channel is provided with a fluid inlet, the other end of the fluid channel is provided with a fluid outlet, and the outlet end of the pressure relief channel is provided with a pressure relief opening. The first channel is connected with the air inlet channel and the fluid channel, an air inlet valve is arranged in the first channel, the second channel is connected with the pressure relief channel and the fluid channel, and a pressure relief valve is arranged in the second channel. A beverage preparation machine is also disclosed. When the internal pressure of the fluid channel is increased and reaches the set pressure of the pressure release valve, the pressure release valve is opened, when the internal pressure of the fluid channel is reduced and reaches the set pressure of the air inlet valve, the air inlet valve is opened, the internal pressure of the beverage preparation machine can be automatically coordinated, the structure is simple, installation is convenient, and work is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an integrated valve structure and a beverage preparation machine. Background Art

[0002] A coffee machine generally includes a water storage container, a water pump, a heating pipe, and a brewing chamber. The above components are connected in sequence through connecting pipes to form a water system. When using a coffee machine to brew coffee, coffee powder in the brewing chamber often blocks the needle or the water system is blocked. When the water system is blocked and the water pressure continues to rise, the connecting pipe may burst and spray hot water, which may cause danger or even damage the machine.

[0003] The existing solution is to install an electronic pressure relief valve and an electronic air intake valve on one or more connecting pipes in the water system, but this will greatly increase the production cost. To further solve the above problems, the conventional method is to install a mechanical pressure relief valve and a mechanical air intake valve in the connecting pipe, and realize the automatic opening or closing of the valve body under the action of the internal and external pressure difference of the water system during heating, but a special connecting pipe is required to install the valve body, which is more troublesome to assemble, and has certain requirements for the processing of the connecting pipe, which will also increase the production cost accordingly.

[0004] The integrated valve structure and beverage preparation machine provided by the utility model are intended to solve at least one of the above technical problems. Utility Model Content

[0005] In view of the above analysis, the utility model proposes an integrated valve structure and a beverage preparation machine to solve the deficiencies of the prior art.

[0006] The utility model is mainly realized through the following technical solutions:

[0007] The utility model provides an integrated valve structure, comprising a main body, wherein a first channel, a second channel, a fluid channel, an air inlet channel, and a pressure relief channel are arranged in the main body, an air inlet port communicating with the outside is arranged at the inlet end of the air inlet channel, a fluid inlet port is arranged at one end of the fluid channel, and a fluid outlet port is arranged at the other end thereof, and a pressure relief port is arranged at the outlet end of the pressure relief channel;

[0008] The first channel connects the intake channel and the fluid channel, an intake valve is provided in the first channel, the second channel connects the pressure relief channel and the fluid channel, a pressure relief valve is provided in the second channel, when the internal pressure of the fluid channel increases and reaches the set pressure of the pressure relief valve, the pressure relief valve opens, when the internal pressure of the fluid channel decreases and reaches the set pressure of the intake valve, the intake valve opens.

[0009] The air inlet valve has an open state and a closed state, and the pressure relief valve has an open state and a closed state. When the pressure in the fluid channel continues to rise to a certain level, the pressure relief valve opens, the air inlet valve closes, and a part of the fluid in the fluid channel is discharged through the fluid outlet, and another part of the fluid in the fluid channel flows out through the pressure relief channel. When the coffee powder blocks the needle, the pressure at the fluid outlet will further increase. At this time, all the fluid in the fluid channel flows out through the pressure relief channel, and the pressure relief is achieved to maintain the internal pressure of the fluid channel and its system at the set value. When the pressure in the fluid channel continues to decrease to a certain level, the air inlet valve opens, the pressure relief valve closes, and the external gas enters the fluid channel through the air inlet channel, so that the internal pressure of the fluid channel is maintained at the set value. When the pressure in the fluid channel is equal to the external pressure, the air inlet valve and the pressure relief valve are both closed, and the fluid flows normally through the fluid channel.

[0010] Furthermore, the main body includes a valve body and a valve cover, the valve cover is provided with a slot with a bottom opening, the valve body is cooperatedly arranged on the slot and is detachably connected to the valve cover.

[0011] Furthermore, a first sealing ring is provided between the valve body and the inner wall of the slot.

[0012] Furthermore, the air inlet channel and the pressure relief channel are arranged on the valve cover, the air outlet end of the air inlet channel is set through the bottom of the slot, the inlet end of the pressure relief channel is set through the bottom of the slot, and the two penetrations are set at a distance.

[0013] Furthermore, the first channel, the second channel and the fluid channel are arranged on the valve body, the first channel is connected to the air outlet end of the air inlet channel, and the top opening of the second channel is connected to the inlet end of the pressure relief channel.

[0014] Furthermore, the first channel and the second channel are arranged at intervals in the horizontal direction.

[0015] Furthermore, the fluid outlet is located below the air inlet, and the fluid inlet is located below the pressure relief port.

[0016] Furthermore, the intake valve includes a first valve core and a first valve stem, the first valve core is clamped in the first channel, the first valve core is provided with a first flow channel for connecting the intake channel and the fluid channel, a first sealing plate is provided in the middle of the first flow channel, a first through-hole is provided on the first sealing plate, the first valve stem is provided in the first flow channel and slidably penetrates the first through-hole, a first sealing portion that is movably sealed with the first through-hole is provided on the first valve stem, a first elastic member is provided between the first valve stem and the first valve core, so that the first sealing portion has a tendency to close the first through-hole, and when the pressure in the fluid channel is less than the external pressure, the first sealing portion opens the first through-hole.

[0017] Furthermore, the pressure relief valve includes a second valve core and a second valve stem, the second valve core is clamped in the second channel, the second valve core is provided with a second flow channel for connecting the pressure relief channel and the fluid channel, a second sealing plate is provided in the middle of the second flow channel, a second sealing plate is provided on the second through-hole, the second valve stem is provided in the second flow channel and slidably penetrates the second through-hole, a second sealing portion that is movably sealed with the second through-hole is provided on the second valve stem, a second elastic member is provided between the second valve stem and the second valve core, so that the second sealing portion has a tendency to close the second through-hole, and when the pressure in the fluid channel is greater than the external pressure, the second sealing portion moves to open the second through-hole.

[0018] The utility model also provides a beverage preparation machine, including a heating water supply system and a brewing system, and also includes the integrated valve structure, the fluid inlet is connected to the heating water supply system, and the fluid outlet and the pressure relief port are respectively connected to the brewing system.

[0019] Compared with the prior art, the integrated valve structure and beverage preparation machine provided by the technical solution of the utility model have the following beneficial effects:

[0020] When the pressure inside the fluid channel increases and reaches the set pressure of the pressure relief valve, the pressure relief valve opens, and when the pressure inside the fluid channel decreases and reaches the set pressure of the air intake valve, the air intake valve opens, which can automatically coordinate the pressure inside the beverage preparation machine. The structure is simple, and the pressure relief valve and the air intake valve are integrated into one, which is more convenient to install, and the requirements for assembly space are also lower, which improves the installation efficiency and makes the work safe and reliable. At the same time, conventional connecting pipes can be used to connect the water circuit, which reduces the production cost. The integrated valve structure is a split structure design, which makes it easier to disassemble and assemble the air intake valve and the pressure relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a structural schematic diagram of the integrated valve structure provided by an embodiment of the utility model;

[0023] Figure 2 It is an exploded schematic diagram of the integrated valve structure provided by an embodiment of the utility model;

[0024] Figure 3 is a cross-sectional view of an integrated valve structure provided by an embodiment of the utility model;

[0025] Figure 4It is a structural schematic diagram of a beverage preparation machine provided in an embodiment of the utility model.

[0026] The reference numerals are as follows:

[0027] 100, main body, 200, heating water supply system, 21, water tank, 22, water pump, 23, heating unit, 300, brewing system, 1, first channel, 2, second channel, 3, fluid channel, 3a, fluid inlet, 3b, fluid outlet, 4, air intake channel, 4a, air intake port, 5, pressure relief channel, 5a, pressure relief port, 6, air intake valve, 61, first valve core, 61a, first flow channel, 611, first sealing plate, 612, first perforation, 62, first Valve stem, 621, first sealing part, 622, first limiting part, 63, first elastic member, 7, pressure relief valve, 71, second valve core, 71a, second flow channel, 711, second sealing plate, 712, second through hole, 72, second valve stem, 721, second sealing part, 722, second limiting part, 73, second elastic member, 8, valve body, 9, valve cover, 9a, slot, 10, first sealing ring, 11, second sealing ring, 12, third sealing ring, 13, screw. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selections and substitutions made by those skilled in the art under the guidance of the present invention shall be deemed to be within the scope of protection claimed by the present invention.

[0029] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1-3As shown, the utility model provides an integrated valve structure, which can be applied to the use scenarios where there is a pressure difference between the inside and outside of the system connected to the integrated valve structure or the system pipeline is prone to blockage, etc., including a main body 100 arranged vertically, and a first channel 1, a second channel 2, a fluid channel 3, an air intake channel 4, and a pressure relief channel 5 are arranged in the main body 100. The entrance end of the air intake channel 4 is provided with an air inlet 4a connected to the outside, one end of the fluid channel 3 is provided with a fluid inlet 3a connected to a device for providing fluid through a pipeline, and the other end is provided with a fluid outlet 3b connected to a device for receiving fluid through a pipeline, and the outlet end of the pressure relief channel 5 is provided with a pressure relief port 5a, and the pressure relief port 5a is connected to the device for receiving fluid through a pipeline. The first channel 1 connects the air intake channel 4 and the fluid channel 3, and an air intake valve 6 is arranged in the first channel 1, the second channel 2 connects the pressure relief channel 5 and the fluid channel 3, and a pressure relief valve 7 is arranged in the second channel 2.

[0032] The above fluid is explained by taking water as an example. The system also includes a heating unit for heating the fluid. The pressure difference between the inside and outside of the system is due to the siphon phenomenon of the heating unit and the increase of water pressure in the water system when water enters the device for receiving the fluid for brewing the powder. After the integrated valve structure is connected to the device for providing the fluid and the device for receiving the fluid respectively, before the fluid flows out of the device for receiving the fluid, the fluid channel 3 is in a normal pressure state. At this time, the air intake valve 6 and the pressure relief valve 7 are both in a closed state. Due to the change in the pressure of the water system, it will be transmitted to the integrated valve structure, so that the air intake valve 6 and the pressure relief valve 7 in it perform corresponding opening and closing actions.

[0033] Specifically, when the pressure inside the fluid channel 3 increases and reaches the set pressure of the pressure relief valve 7, the pressure relief valve 7 opens, and the fluid channel 3 is connected to the pressure relief channel 5. The distribution of water flow during pressure relief is related to the pressure inside the water system. When the coffee powder blocks the needle, the pressure at the fluid outlet will further increase. At this time, all the fluid in the fluid channel flows out through the pressure relief channel. When the brewing chamber is not completely blocked, part of the water in the fluid channel 3 is discharged through the fluid outlet 3b, and the other part is discharged through the pressure relief port 5a. The air inlet valve 6 is closed. At this time, the fluid channel 3 is not connected to the air inlet channel 4, and the external air cannot enter the integrated valve structure. When the pressure inside the fluid channel 3 decreases and reaches the set pressure of the air inlet valve 6, the air inlet valve 6 opens, and the fluid channel 3 is connected to the air inlet channel 4. The external air enters the fluid channel 3 from the air inlet channel 4. The pressure relief valve 7 is closed. At this time, the fluid channel 3 is not connected to the pressure relief channel 5, and the water in the fluid channel 3 cannot be discharged from the pressure relief port 5a. When the pressure in the fluid channel 3 is consistent with the external pressure, the air inlet valve 6 and the pressure relief valve 7 are both closed.

[0034] In this embodiment, the first channel 1 and the second channel 2 are arranged at intervals in the horizontal direction and are extended vertically in the middle of the main body 100. The fluid channel 3 is arranged in the lower part of the main body 100 in the horizontal direction, and the opening directions of the fluid inlet 3a and the fluid outlet 3b are arranged in opposite directions. The air inlet channel 4 and the pressure relief channel 5 are located in the upper part of the main body 100, and the opening directions of the air inlet 4a and the pressure relief port 5a are arranged in opposite directions.

[0035] like Figure 2-3 As shown, preferably, the main body 100 includes a valve body 8 and a valve cover 9, the valve cover 9 is provided with a slot 9a with a bottom opening, the valve body 8 is cooperatedly arranged on the slot 9a and is detachably connected to the valve cover 9.

[0036] In this embodiment, a plurality of mounting holes are provided on the outer wall of the valve body 8, and the valve body 8 is fixedly connected to the valve cover 9 by a plurality of screws 13. The structure is not limited to the above structure, and one or a combination of connection modes such as snap connection and threaded connection can also be used. The card slot 9a is located at the bottom of the valve cover 9.

[0037] In order to ensure reliable sealing between the valve body 8 and the valve cover 9, a first sealing ring 10 is provided between the valve body 8 and the inner wall of the groove 9a.

[0038] In this embodiment, a first sealing ring 10 is arranged between the top surface of the first channel 1 and the bottom of the slot 9a, and a first sealing ring 10 is arranged between the top surface of the second channel 2 and the bottom of the slot 9a, so as to reliably separate the top of the first channel 1 from the top of the second channel 2 and improve the sealing effect.

[0039] Preferably, the air inlet channel 4 and the pressure relief channel 5 are arranged on the valve cover 9, the air outlet end of the air inlet channel 4 passes through the bottom of the slot 9a, the inlet end of the pressure relief channel 5 passes through the bottom of the slot 9a, and the two penetrations are arranged at a distance.

[0040] In this embodiment, the air intake passage 4 and the pressure relief passage 5 are horizontally arranged on the top of the valve cover 9. After the valve body 8 and the valve cover 9 are assembled, the air intake valve 6 and the pressure relief valve 7 are in a closed state.

[0041] Preferably, the first channel 1, the second channel 2 and the fluid channel 3 are arranged on the valve body 8. The first channel 1 is connected to the outlet end of the air inlet channel 4, and the top opening of the second channel 2 is connected to the inlet end of the pressure relief channel 5. The fluid outlet 3b is located below the air inlet 4a, and the fluid inlet 3a is located below the pressure relief port 5a.

[0042] In this embodiment, the fluid channel 3 is arranged at the bottom of the valve body 8, and two card holes are provided at intervals on the top of the valve body 8 to form a first channel 1 and a second channel 2 respectively. The bottoms of the card holes are respectively connected to the fluid channel 3, and a step is formed at the connection between the card holes and the fluid channel 3, so as to facilitate the installation of the intake valve 6 and the pressure relief valve 7 on the corresponding card holes respectively.

[0043] The intake valve 6 includes a first valve core 61 and a first valve stem 62. The first valve core 61 is clamped in the first channel 1. The first valve core 61 is provided with a first flow channel 61a for connecting the intake channel 4 and the fluid channel 3. A first sealing plate 611 is provided in the middle of the first flow channel 61a, and a first through-hole 612 is provided on the first sealing plate 611. The first valve stem 62 is provided in the first flow channel 61a and slides through the first through-hole 612. The first valve stem 62 is provided with a first sealing portion 621 that is movably sealed with the first through-hole 612. A first elastic member 63 is provided between the first valve stem 62 and the first valve core 61, so that the first sealing portion 621 has a tendency to close the first through-hole 612, and when the pressure in the fluid channel 3 is lower than the external pressure, the first sealing portion 621 opens the first through-hole 612.

[0044] In this embodiment, the top of the first valve core 61 is located below the corresponding first sealing ring 10, a first limiting portion 622 is provided at one end of the first valve stem 62, and a first sealing portion 621 is provided at the other end of the first valve stem 62. The first sealing portion 621 is located at the lower part of the first flow channel 61a, and the first elastic member 63 is a spring that is sleeved on the first valve stem 62 and clamped between the first sealing plate 611 and the first limiting portion 622. The first elastic member 63 is located at the upper part of the first flow channel 61a.

[0045] The first sealing plate 611 separates the first flow channel 61a into two parts, and the first valve stem 62 is slidably disposed on the first through hole 612 under the cooperation of the first elastic member 63 and the first sealing portion 621, so that the first sealing portion 621 can movably seal the first flow channel 61a.

[0046] The pressure relief valve 7 includes a second valve core 71 and a second valve stem 72. The second valve core 71 is clamped in the second channel 2. The second valve core 71 is provided with a second flow channel 71a for connecting the pressure relief channel 5 and the fluid channel 3. A second sealing plate 711 is provided in the middle of the second flow channel 71a. The second sealing plate 711 is provided with a second through-hole 712. The second valve stem 72 is provided in the second flow channel 71a and slidably penetrates the second through-hole 712. The second valve stem 72 is provided with a second sealing portion 721 that is movably sealed with the second through-hole 712. A second elastic member 73 is provided between the second valve stem 72 and the second valve core 71, so that the second sealing portion 721 has a tendency to close the second through-hole 712, and when the pressure in the fluid channel 3 is greater than the external pressure, the second sealing portion 721 moves to open the second through-hole 712.

[0047] In this embodiment, the top of the second valve core 71 is located below the corresponding first sealing ring 10, a second limiting portion 722 is provided at one end of the second valve stem 72, and a second sealing portion 721 is provided at the other end of the second valve stem 72. The second sealing portion 721 is located at the upper part of the second flow channel 71a, and the second elastic member 73 is a spring sleeved on the second valve stem 72 and clamped between the second sealing plate 711 and the second limiting portion 722. The second elastic member 73 is located at the lower part of the second flow channel 71a.

[0048] The second sealing plate 711 separates the second flow channel 71a into two parts, and the second elastic member 73 and the second sealing portion 721 cooperate with each other, so that the second valve stem 72 is slidably disposed on the second through hole 712, so that the second sealing portion 721 can movably seal the second flow channel 71a.

[0049] To ensure the sealing performance between the valve core and the valve body 8 , a second sealing ring 11 is provided between the intake valve 6 and the inner wall of the first channel 1 , and a third sealing ring 12 is provided between the pressure relief valve 7 and the inner wall of the second channel 2 .

[0050] The air intake valve 6 and the pressure relief valve 7 are arranged in opposite directions. After the air intake valve 6 and the pressure relief valve 7 are installed separately, they can be directly inserted into the valve body 8, which is convenient for installation.

[0051] like Figure 3 , 4 As shown, the utility model limits the scope of household appliances, for example, a beverage preparation machine is disclosed, which is particularly suitable for household appliances such as coffee machines and soybean milk machines, including a heating water supply system 200 and a brewing system 300, and also includes the above-mentioned integrated valve structure, the fluid inlet 3a is connected to the heating water supply system 200, and the fluid outlet 3b and the pressure relief port 5a are respectively connected to the brewing system 300. Among them, the brewing system 300 is a brewing chamber or a brewing chamber, that is, a device for receiving fluid.

[0052] The heating water supply system 200 includes a water tank 21, a water pump 22 and a heating unit 23 which are connected in sequence through water pipes. The heating unit 23 is connected to the fluid inlet 3a through a connecting pipe. The water tank 21 is a device for providing fluid.

[0053] The water pump 22 sucks water from the water tank 21 into the heating unit 23 for heating, and the heated water enters the integrated valve structure. If the water path at the heating unit 23 is unobstructed, the integrated valve structure does not work; when the water at the fluid outlet 3b passes through the coffee powder in the brewing chamber, the water pressure at the fluid outlet 3b will increase, and the pressure relief valve 7 will automatically compress the second elastic member 73 under the action of the internal pressure, so that the second sealing portion 721 is displaced, and the pressure relief valve 7 is opened to drain water to achieve pressure relief; because the heating unit 23 will cause a water path siphon phenomenon, at this time, the air intake valve 6 automatically compresses the first elastic member 63 under the action of the external pressure, so that the first sealing portion 621 is displaced, and the air intake valve 6 is opened to inhale air, thereby preventing the coffee powder in the brewing chamber from being sucked into the heating unit 23, causing water path blockage or water path obstruction, and ensuring the normal operation of the coffee machine.

[0054] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An integrated valve structure, characterized in that: The invention comprises a main body (100), wherein a first channel (1), a second channel (2), a fluid channel (3), an air inlet channel (4), and a pressure relief channel (5) are provided in the main body (100), wherein an air inlet (4a) communicating with the outside is provided at an inlet end of the air inlet channel (4), a fluid inlet (3a) is provided at one end of the fluid channel (3), and a fluid outlet (3b) is provided at the other end thereof, and a pressure relief port (5a) is provided at an outlet end of the pressure relief channel (5); The first channel (1) connects an intake channel (4) and a fluid channel (3); an intake valve (6) is provided in the first channel (1); the second channel (2) connects a pressure relief channel (5) and the fluid channel (3); a pressure relief valve (7) is provided in the second channel (2); when the internal pressure of the fluid channel (3) increases and reaches a set pressure of the pressure relief valve (7), the pressure relief valve (7) opens; when the internal pressure of the fluid channel (3) decreases and reaches a set pressure of the intake valve (6), the intake valve (6) opens.

2. The integrated valve structure according to claim 1, characterized in that: The main body (100) comprises a valve body (8) and a valve cover (9); the valve cover (9) is provided with a clamping groove (9a) with a bottom opening; the valve body (8) is arranged in cooperation with the clamping groove (9a) and is detachably connected to the valve cover (9).

3. The integrated valve structure according to claim 2, characterized in that: A first sealing ring (10) is provided between the valve body (8) and the inner wall of the clamping groove (9a).

4. The integrated valve structure according to claim 2, characterized in that: The air inlet channel (4) and the pressure relief channel (5) are arranged on the valve cover (9); the air outlet end of the air inlet channel (4) is arranged through the bottom of the slot (9a); the inlet end of the pressure relief channel (5) is arranged through the bottom of the slot (9a); and the two penetration points are arranged with a spacing.

5. The integrated valve structure according to claim 4, characterized in that: The first channel (1), the second channel (2) and the fluid channel (3) are arranged on the valve body (8); the first channel (1) is connected to the outlet end of the air inlet channel (4); and the top opening of the second channel (2) is connected to the inlet end of the pressure relief channel (5).

6. The integrated valve structure according to claim 1, characterized in that: The first channel (1) and the second channel (2) are arranged at intervals in the horizontal direction.

7. The integrated valve structure according to claim 1, characterized in that: The fluid outlet (3b) is located below the air inlet (4a), and the fluid inlet (3a) is located below the pressure relief port (5a).

8. The integrated valve structure according to any one of claims 1 to 7, characterized in that: The air intake valve (6) comprises a first valve core (61) and a first valve stem (62); the first valve core (61) is clamped in the first channel (1); the first valve core (61) is provided with a first flow channel (61a) for connecting the air intake channel (4) and the fluid channel (3); a first sealing plate (611) is provided in the middle of the first flow channel (61a); the first sealing plate (611) is provided with a first through hole (612); the first valve stem (62) is provided in the first flow channel (61a); a) and is slidably arranged on the first through hole (612); the first valve stem (62) is provided with a first sealing portion (621) which is movably sealed with the first through hole (612); a first elastic member (63) is provided between the first valve stem (62) and the first valve core (61), so that the first sealing portion (621) has a tendency to close the first through hole (612); and when the pressure in the fluid channel (3) is lower than the external pressure, the first sealing portion (621) opens the first through hole (612).

9. The integrated valve structure according to any one of claims 1 to 7, characterized in that: The pressure relief valve (7) comprises a second valve core (71) and a second valve stem (72); the second valve core (71) is clamped in the second channel (2); the second valve core (71) is provided with a second flow channel (71a) for connecting the pressure relief channel (5) and the fluid channel (3); a second sealing plate (711) is provided in the middle of the second flow channel (71a); the second sealing plate (711) is provided with a second through hole (712); the second valve stem (72) is provided in the second flow channel (71a); ) and is slidably inserted into the second through hole (712); the second valve stem (72) is provided with a second sealing portion (721) which is movably sealed with the second through hole (712); a second elastic member (73) is provided between the second valve stem (72) and the second valve core (71), so that the second sealing portion (721) has a tendency to close the second through hole (712); and when the pressure in the fluid channel (3) is greater than the external pressure, the second sealing portion (721) moves to open the second through hole (712).

10. A beverage preparation machine, comprising a heating water supply system (200) and a brewing system (300), characterized in that: It also includes an integrated valve structure as described in any one of claims 1 to 9, wherein the fluid inlet (3a) is connected to the heating water supply system (200), and the fluid outlet (3b) and the pressure relief port (5a) are respectively connected to the brewing system (300).

Images