CN220646763U - Micro-pressure valve assembly and cooking machine - Google Patents

Abstract

The utility model provides a micro-pressure valve assembly, which comprises a valve body, an opening and closing part and a driving part. The valve body is provided with an exhaust channel, the exhaust channel is provided with an air inlet communicated with the outside of one side of the valve body, the exhaust channel is provided with an air outlet communicated with the outside of the other side of the valve body, and the number of the air outlets is at least one. The opening and closing piece has exhaust position and shutoff position for the valve body, and the opening and closing piece can be along keeping away from or being close to the direction of gas outlet and be moved between exhaust position and shutoff position, when being in exhaust position, all have the interval between opening and closing piece and the air inlet and between opening and closing piece and the gas outlet, when being in shutoff position, one of them of opening and closing piece bottom shutoff air inlet and gas outlet. The driving piece is arranged above the valve body and is used for applying force to the opening and closing piece to drive the opening and closing piece to move between the exhaust position and the blocking position. The utility model can adjust the pressure of the inner cavity of the cooking utensil and the accumulation condition of water vapor in time, thereby improving the cooking effect.

Description

Micro-pressure valve assembly and cooking machine

Technical Field

The utility model relates to a valve assembly, in particular to a micro-pressure valve assembly and a cooking machine, and belongs to the technical field of kitchen electrical equipment.

Background

Micro-pressure cooking of a cooking appliance is an effective cooking mode for improving the cooking degree of food materials and shortening the cooking time, and in various cooking appliances, particularly a cooking machine with a multifunctional cooking mode, the micro-pressure cooking is realized by means of a micro-pressure valve product arranged on a cup cover assembly positioned at the top of a cup body assembly of the cooking machine.

The existing micro-pressure valve product generally does not have a controllable pressure relief mode, a ball is used as a valve core in the micro-pressure valve product, the exhaust channel of the micro-pressure valve is plugged by means of the weight of the ball, so that certain micro-pressure is generated by accumulation of water vapor in the inner cavity of the cup body of the food processor during cooking, the cooking speed of food materials is accelerated, but the pressure relief of the existing micro-pressure valve product is realized by completely propping up the ball after a certain degree of accumulation of water vapor, at the moment, the ball is propped up from the bottom opening of the exhaust channel under the acting force of the water vapor, so that the exhaust channel is smooth, excessive water vapor is accumulated to enable the food materials to be overripe during cooking of some easy-to-cook food materials, and the existing micro-pressure valve product cannot timely and controllably perform pressure relief treatment on the water vapor in the inner cavity of the cup body of the food processor, and the cooking effect of the food materials is reduced.

Disclosure of Invention

Based on the background, the utility model aims to provide the micro-pressure valve assembly, which can timely adjust the pressure of the inner cavity of the cooking utensil and the accumulation condition of water vapor, so as to improve the cooking effect.

In order to achieve the above object, the present utility model provides the following technical solutions:

a micropressure valve assembly comprising:

the valve body is provided with an exhaust channel, the exhaust channel is provided with an air inlet communicated with the outside of one side of the valve body, the exhaust channel is provided with air outlets communicated with the outside of the other side of the valve body, and the number of the air outlets is at least one;

the opening and closing piece is provided with an exhaust position and a blocking position relative to the valve body, the opening and closing piece can move between the exhaust position and the blocking position along the direction away from or close to the air outlet, when the opening and closing piece is positioned at the exhaust position, the opening and closing piece and the air outlet are provided with intervals, and when the opening and closing piece is positioned at the blocking position, the bottom of the opening and closing piece blocks one of the air inlet and the air outlet;

the driving piece is arranged above the valve body and used for applying force to the opening and closing piece to drive the opening and closing piece to move between the exhaust position and the blocking position.

The micro-pressure valve assembly is used for controlling the on-off of the inner cavity and the outside of the cooking utensil, the opening and closing piece is driven by the driving piece to move downwards along the extending direction of the exhaust channel, so that the bottom of the opening and closing piece is used for blocking the air inlet or the first air outlet, the blocking of the micro-pressure valve assembly to the inner cavity and the outside of the cooking utensil is realized, and the steam is accumulated in the inner cavity of the cooking utensil and is in a micro-pressure state during cooking; in the cooking process, the driving part drives the opening and closing part to move upwards along the extending direction of the exhaust channel at any time, so that the first air outlet, the exhaust channel and the air inlet are smooth, the water vapor in the inner cavity of the cooking utensil is discharged in time and is in a pressure release state, the pressure of the inner cavity of the cooking utensil and the accumulation condition of the water vapor can be adjusted in time, and the cooking effect is improved.

Preferably, the opening and closing member is disposed in the exhaust passage, the driving member includes an electromagnet having an energized state and a de-energized state, the opening and closing member is made of a magnetic material, when the electromagnet is in the energized state, the electromagnet applies an upward electromagnetic force to the opening and closing member to cause the opening and closing member to be in an exhaust position, and when the electromagnet is in the de-energized state, the electromagnetic force of the electromagnet disappears to cause the opening and closing member to be in a blocking position under the action of gravity. The electromagnetic force of the electromagnet drives the opening and closing piece made of magnetic materials to displace, so that the non-contact control of the driving piece on the opening and closing piece is realized.

Preferably, the valve body comprises a first valve body and a second valve body, the first valve body is connected with the second valve body, and the second valve body is arranged close to the upper surface of the opening and closing piece; the micropressure valve assembly further comprises a guide column, and at least part of the opening and closing piece and at least part of the guide column are positioned in the accommodating cavity of the first valve body; a space is reserved between the side wall corresponding to the accommodating cavity of the first valve body and the outer peripheral surface of the opening and closing member, and the space between the side wall corresponding to the accommodating cavity of the first valve body and the outer peripheral surface of the opening and closing member forms part of the exhaust channel; the opening and closing piece is sleeved outside the guide post and is in sliding connection with the guide post; when the opening and closing piece is in the exhaust position, the bottom of the second valve body is abutted against the top of the opening and closing piece. The guide column plays a guiding role on the opening and closing member and limits the opening and closing member to displace along the extending direction of the exhaust passage.

Preferably, the guide post is provided with a water inlet channel extending along the axial direction of the guide post and penetrating through the guide post, the top of the water inlet channel is provided with a water inlet communicated with the outside of the valve body, and the bottom of the water inlet channel is provided with a water outlet communicated with the outside of the valve body; the gas outlet comprises a first gas outlet, the water inlet and the first gas outlet are both positioned at the top of the second valve body, and the first gas outlet circumferentially surrounds the water inlet. The water inlet channel can be matched with an external water pump and a water adding pipeline to increase the water adding function of the micro-pressure valve assembly.

Preferably, the air outlet comprises a first air outlet and a second air outlet, the first air outlet is formed at the top of the valve body, and the first air outlet is communicated with the exhaust channel and the outside of the top of the valve body; the second air outlet is communicated with the outside of the valve body and the side part of the exhaust channel. The second air outlet further improves the pressure release speed of the micro-pressure valve assembly.

Preferably, the bottom of the opening and closing piece is in an inverted cone shape, the side wall of the lower part of the exhaust channel is provided with a conical surface matched with the end surface of the bottom of the opening and closing piece, and when the opening and closing piece is in a blocking position, the end surface of the bottom of the opening and closing piece is abutted to the conical surface. When the opening and closing piece is in the plugging position under the action of gravity, the inverted cone structure at the bottom of the opening and closing piece is matched with the conical surface of the side wall at the lower part of the exhaust channel, so that the sealing effect of the opening and closing piece on the air inlet is improved, and the sealing tightness is better.

Preferably, the air outlet is formed at the top of the valve body; the opening and closing piece is at least partially arranged outside the valve body and above the air outlet, the driving piece comprises a power push rod with a fixed end and a movable end, the fixed end of the power push rod is fixedly connected with an external frame, the movable end of the power push rod is fixedly connected with the opening and closing piece, when the opening and closing piece is in an exhaust position, a space is reserved between the bottom of the opening and closing piece and the top of the valve body, and when the opening and closing piece is in a blocking position, the bottom of the opening and closing piece is abutted to the top of the valve body. The power push rod can convert the energy of the power source into the linear motion of the movable end relative to the fixed end, and can be an electromagnetic push rod, an electric push rod, a pneumatic push rod or an electro-hydraulic push rod and the like.

Preferably, the number of the air outlets is not less than two, one of the air outlets is positioned at the top of the valve body and adjacent to the axis of the valve body, and the other air outlet circumferentially surrounds the air outlet at the position adjacent to the axis of the valve body. The third air outlet further improves the pressure release speed of the micro-pressure valve assembly.

Preferably, one of the bottom of the opening and closing member and the top of the valve body is provided with a sealing member, when the opening and closing member is in the blocking position, the sealing member abuts against the other one of the bottom of the opening and closing member and the top of the valve body, and the sealing member circumferentially surrounds the outside of the first air outlet. When the opening and closing piece is in the blocking position, the sealing piece improves the blocking effect of the opening and closing piece on the first air outlet.

The utility model provides a cooking machine, includes the drive frame, locates cooking cup subassembly and lid subassembly that the lid was located on the cooking cup subassembly on the drive frame, be equipped with on the lid subassembly as above arbitrary micropressure valve subassembly. Through the micropressure valve subassembly that sets up, realize blocking and the intercommunication to cooking cup subassembly inner chamber and cooking cup subassembly outside, at the culinary art in-process of cooking machine, can be in the pressure release state through the timely discharge of vapor that makes cooking utensil inner chamber of control micropressure valve subassembly at any time to in time adjust the pressure size and the vapor accumulation condition of cooking cup subassembly inner chamber, improve the culinary art effect of cooking machine.

Compared with the prior art, the utility model has the following advantages:

according to the micro-pressure valve assembly, the driving piece drives the opening and closing piece to move along the extending direction of the exhaust channel, so that the air inlet or the first air outlet is blocked at the bottom of the opening and closing piece, the blocking of the micro-pressure valve assembly to the inner cavity and the outside of the cooking utensil is realized, the inner cavity of the cooking utensil is in a micro-pressure state during cooking, the position of the opening and closing piece is changed at any time through the driving piece in the cooking process, the first air outlet, the exhaust channel and the air inlet are unblocked, the water vapor in the inner cavity of the cooking utensil is timely discharged and is in a pressure relief state, and the pressure and the water vapor accumulation condition of the inner cavity of the cooking utensil can be timely adjusted, so that the cooking effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a micro-pressure valve assembly according to a first embodiment of the present utility model when an opening and closing member is in a blocking position;

FIG. 2 is a schematic view of a micro-pressure valve assembly according to a first embodiment of the present utility model when the opening and closing member is in the exhaust position;

FIG. 3 is a schematic structural view of a micropressure valve assembly according to a second embodiment of the present utility model when the opening and closing member is in the blocking position;

fig. 4 is a schematic structural diagram of a micropressure valve assembly according to a second embodiment of the present utility model when the opening and closing member is in the exhaust position.

In the figure: 1. a valve body; 2. an opening and closing member; 3. an electromagnet; 4. a power push rod; 10. a frame; 20. a water adding pipeline; 101. an exhaust passage; 102. an air inlet; 103. a first air outlet; 104. a second air outlet; 105. a water inlet channel; 106. a water inlet; 107. a water outlet; 108. a third air outlet; 110. a guide post; 120. a second valve body; 130. a conical surface; 140. a seal; 401. a fixed end; 402. and a mobile terminal.

Detailed Description

The technical scheme of the utility model is further specifically described below through specific embodiments and with reference to the accompanying drawings. It should be understood that the practice of the utility model is not limited to the following examples, but is intended to be within the scope of the utility model in any form and/or modification thereof.

In the present utility model, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components and devices in the following examples are, unless otherwise indicated, all those components and devices known to those skilled in the art, and their structures and principles are known to those skilled in the art from technical manuals or by routine experimentation.

The embodiment of the utility model discloses a micro-pressure valve assembly, which comprises a valve body, an opening and closing part and a driving part. The valve body is provided with an exhaust channel, the exhaust channel is provided with an air inlet communicated with the outside of one side of the valve body, the exhaust channel is provided with an air outlet communicated with the outside of the other side of the valve body, and the number of the air outlets is at least one. The opening and closing piece has exhaust position and shutoff position for the valve body, and the opening and closing piece can be followed or be close to the direction of gas outlet and is moved between exhaust position and shutoff position, when being in exhaust position, all have the interval between opening and closing piece and the air inlet and between opening and closing piece and the gas outlet, when being in shutoff position, one of them of opening and closing piece bottom shutoff air inlet and gas outlet. The driving piece is arranged above the valve body and is used for applying force to the opening and closing piece to drive the opening and closing piece to move between the exhaust position and the blocking position.

The micro-pressure valve component is used for controlling the on-off of the inner cavity and the outside of the cooking utensil. The driving part drives the opening and closing part to move downwards along the extending direction of the exhaust channel, so that the bottom of the opening and closing part is used for blocking the air inlet or the air outlet, the blocking of the micro-pressure valve assembly to the inner cavity and the outside of the cooking utensil is realized, and the steam is accumulated in the inner cavity of the cooking utensil and is in a micro-pressure state when the cooking utensil is cooked. In the cooking process, the driving part drives the opening and closing part to move upwards along the extending direction of the exhaust channel at any time, so that the air outlet, the exhaust channel and the air inlet are smooth, the water vapor in the inner cavity of the cooking utensil is discharged in time and is in a pressure release state, the pressure of the inner cavity of the cooking utensil and the accumulation condition of the water vapor can be adjusted in time, and the cooking effect is improved.

In the following detailed description of embodiments of the utility model, reference is made to the accompanying drawings, in which, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the utility model. However, one or more embodiments may be practiced by one of ordinary skill in the art without these specific details.

Example 1

A micropressure valve assembly as shown in fig. 1 and 2 comprises a valve body 1, an opening and closing member 2 and a driving member. The valve body 1 is provided with an exhaust channel 101 penetrating through the top of the valve body 1 and the bottom of the valve body 1, an air inlet 102 communicated with the outside of the valve body 1 is arranged at the bottom of the exhaust channel 101, and a first air outlet 103 communicated with the outside of the valve body 1 is arranged at the top of the exhaust channel 101. Of course, the setting position of the first air outlet 103 may be adjusted according to practical applications, for example, the air outlet is set at the side of the steam exhaust channel.

The shutter 2 is made of a magnetic material and is provided in the exhaust passage 101, the shutter 2 having an exhaust position and a blocking position with respect to the valve body 1, the shutter 2 being movable between the exhaust position and the blocking position along the extending direction of the exhaust passage 101. When in the exhaust position, the space is reserved between the bottom end surface of the opening and closing member 2 and the air inlet 102 and between the top end surface of the opening and closing member 2 and the first air outlet 103, and when in the blocking position, at least part of the bottom end surface of the opening and closing member 2 blocks the air inlet 102. When the air outlet is provided at the side of the exhaust passage, the opening and closing member 2 moves between the exhaust position and the blocking position in a direction away from or close to the air outlet.

The driving piece is arranged above the valve body 1 and is used for applying force to the opening and closing piece 2 to drive the opening and closing piece 2 to move between the exhaust position and the blocking position. Specifically, the driving member is mounted on the external frame 10 located above the valve body 1, and the driving member includes an electromagnet 3 having an energized state and a de-energized state, when the electromagnet 3 is in the energized state, the electromagnet 3 applies an upward electromagnetic force to the opening and closing member 2 to place the opening and closing member 2 in the exhaust position, and when the electromagnet 3 is in the de-energized state, the electromagnetic force of the electromagnet 3 disappears to place the opening and closing member 2 in the blocking position under the action of gravity. The opening and closing piece 2 made of magnetic materials is driven to displace by the electromagnetic force of the electromagnet 3, so that the non-contact control of the opening and closing piece 2 by the driving piece is realized. The driving member and the top of the valve body 1 have a certain installation distance, and the installation distance is designed according to the electromagnetic force of the electromagnet 3 and the weight of the opening and closing member 2.

In this embodiment, in order to guide the opening and closing member 2, the valve body 1 is further provided with a guide post 110 inside, the guide post 110 is located in the exhaust passage 101 and parallel to the extending direction of the exhaust passage 101, the opening and closing member 2 is sleeved outside the guide post 110 and slidingly connected with the guide post 110, and the guide post 110 limits the opening and closing member 2 to displace along the extending direction of the exhaust passage 101. The surface of the guide post 110 adjacent to the first air outlet 103 is also provided with a second valve body 120, when the opening and closing member 2 is in the exhaust position, the bottom of the second valve body 120 abuts against the top of the opening and closing member 2, so that a space is reserved between the top end surface of the opening and closing member 2 and the first air outlet 103.

In this embodiment, in order to increase the water adding function of the micropressure valve assembly, the guide post 110 is provided with a water inlet channel 105 extending along the axial direction of the guide post 110 and penetrating through the top of the valve body 1 and the bottom of the valve body 1, the top of the water inlet channel 105 is provided with a water inlet 106 communicated with the outside of the valve body 1, the bottom of the water inlet channel 105 is provided with a water outlet 107 communicated with the outside of the valve body 1, the water inlet 106 and the first air outlet 103 are both positioned at the top of the valve body 1, and the first air outlet 103 circumferentially surrounds the water inlet 106. The water inlet channel 105 is used for cooperating external water pump and water adding pipeline 20, and when using, the external water pump passes through water adding pipeline 20 and connects water inlet channel 105 to carry out the operation of adding water to cooking utensil inner chamber through the micropressure valve subassembly, during the use, external water pump is through water adding pipeline 20 connection water inlet channel 105 all the time, because the pressure of external water pump, it has unidirectional flow stopping effect to water inlet channel 105, prevents the vapor of cooking utensil inner chamber from entering water adding pipeline 20 through by water inlet channel 105.

In this embodiment, in order to further increase the pressure release speed of the micropressure valve assembly, the first air outlets 103 are uniformly distributed on the top of the valve body 1 with the axis of the valve body 1 as the center, and the side portion of the valve body 1 is further provided with the second air outlets 104 that communicate the outside of the valve body 1 with the side portion of the air exhaust channel 101, and when the opening and closing member 2 is in the air exhaust position or the blocking position, the side walls of the air exhaust channel 101 and the side portion of the opening and closing member 2 have a space therebetween.

In this embodiment, in order to improve the plugging effect of the opening and closing member 2 on the air inlet 102, the bottom of the opening and closing member 2 is in an inverted cone shape, the side wall of the lower portion of the air exhaust channel 101 is provided with a conical surface 130 matched with the end surface of the bottom of the opening and closing member 2, and when the opening and closing member 2 is in the plugging position, the end surface of the bottom of the opening and closing member 2 abuts against the conical surface 130. When the opening and closing member 2 is in the blocking position under the action of gravity, the inverted cone structure at the bottom of the opening and closing member 2 is matched with the conical surface 130 of the side wall at the lower part of the exhaust channel 101, so that the sealing and closing member has better matching tightness.

Example two

A micropressure valve assembly as shown in fig. 3 and 4 comprises a valve body 1, an opening and closing member 2 and a driving member. The valve body 1 is provided with an exhaust channel 101 penetrating through the top of the valve body 1 and the bottom of the valve body 1, an air inlet 102 communicated with the outside of the valve body 1 is arranged at the bottom of the exhaust channel 101, and a first air outlet 103 communicated with the outside of the valve body 1 is arranged at the top of the exhaust channel 101.

The opening and closing member 2 is made of silica gel material, of course, the opening and closing member 2 can be made of other elastic materials or plastic materials, and the opening and closing member 2 is arranged outside the valve body 1 and above the first air outlet 103. The shutter 2 has an exhaust position and a blocking position with respect to the valve body 1, and the shutter 2 is movable between the exhaust position and the blocking position along the extending direction of the exhaust passage 101. When the opening and closing piece 2 is in the exhaust position, a space is reserved between the bottom of the opening and closing piece 2 and the top of the valve body 1, and when the opening and closing piece 2 is in the blocking position, the bottom of the opening and closing piece 2 is abutted to the top of the valve body 1.

The driving piece is arranged above the valve body 1 and is used for applying force to the opening and closing piece 2 to drive the opening and closing piece 2 to move between the exhaust position and the blocking position. Specifically, the driving member includes a power pushrod 4 having a fixed end 401 and a movable end 402, the fixed end 401 of the power pushrod 4 is fixedly connected to an external frame 10 located above the valve body 1, and the movable end 402 of the power pushrod 4 is fixedly connected to the opening and closing member 2. The power push rod 4 can convert the energy of a power source into linear motion of the moving end 402 relative to the fixed end 401, and the power push rod 4 can be an electromagnetic push rod, an electric push rod, a pneumatic push rod, an electro-hydraulic push rod or the like.

In this embodiment, in order to further increase the pressure release speed of the micro-pressure valve assembly, the top of the valve body 1 is further provided with a third air outlet 108 communicating the outside of the valve body 1 with the air exhaust channel 101, the third air outlet 108 is located at a position adjacent to the axis of the valve body 1 at the top of the valve body 1, and the first air outlet 103 circumferentially surrounds the third air outlet 108.

In this embodiment, in order to further improve the blocking effect of the opening and closing member 2 on the first air outlet 103 and the third air outlet 108, the top of the valve body 1 is provided with a sealing member 140, the sealing member 140 is an annular member protruding from the top end surface of the valve body 1, the sealing member 140 surrounds the outside of the first air outlet 103 along the outer circumference of the top end surface of the valve body 1, and when the opening and closing member 2 is in the blocking position, the sealing member 140 abuts against the bottom of the opening and closing member 2. Of course, the sealing element 140 may also be disposed on the bottom end surface of the opening and closing element 2, where the sealing element 140 moves along with the opening and closing element 2, and when the opening and closing element 2 is in the blocking position, the sealing element 140 abuts against the top end surface of the valve body 1, and surrounds the outside of the first air outlet 103 along the outer circumferential direction of the top end surface of the valve body 1.

Example III

A cooking machine comprises a driving machine seat, a cooking cup assembly arranged on the driving machine seat and a cup cover assembly arranged on the cooking cup assembly in a covering mode, wherein a micro-pressure valve assembly of the first embodiment is arranged on the cup cover assembly. The drive machine seat of the food processor is provided with a machine frame 10 fixedly connected with the drive machine seat, a part of the machine frame 10 is positioned above the cup cover component, and a driving piece of the micro-pressure valve component is fixedly connected with the machine frame 10.

Through the micropressure valve subassembly that sets up, realize blocking and the intercommunication to cooking cup subassembly inner chamber and cooking cup subassembly outside, at the culinary art in-process of cooking machine, can be in the pressure release state through the timely discharge of vapor that makes cooking utensil inner chamber of control micropressure valve subassembly at any time to in time adjust the pressure size and the vapor accumulation condition of cooking cup subassembly inner chamber, improve the culinary art effect of cooking machine.

Example IV

A cooking machine comprises a driving machine seat, a cooking cup assembly arranged on the driving machine seat and a cup cover assembly arranged on the cooking cup assembly in a covering mode, wherein a micro-pressure valve assembly of a second embodiment is arranged on the cup cover assembly. The drive machine seat of the food processor is provided with a machine frame 10 fixedly connected with the drive machine seat, a part of the machine frame 10 is positioned above the cup cover component, and a driving piece of the micro-pressure valve component is fixedly connected with the machine frame 10.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (10)

1. A micropressure valve assembly, characterized in that: the micropressure valve assembly includes:

the valve body (1), the valve body (1) is provided with an exhaust passage (101), the exhaust passage (101) is provided with an air inlet (102) communicated with the outside of one side of the valve body (1), the exhaust passage (101) is provided with air outlets communicated with the outside of the other side of the valve body (1), and the number of the air outlets is at least one;

the opening and closing piece (2) is provided with an exhaust position and a blocking position relative to the valve body (1), the opening and closing piece (2) can move between the exhaust position and the blocking position along the direction away from or close to the air outlet, when the opening and closing piece (2) is in the exhaust position, a space is reserved between the opening and closing piece (2) and the air inlet (102) and between the opening and closing piece (2) and the air outlet, and when the opening and closing piece is in the blocking position, one of the air inlet (102) and the air outlet is blocked by the bottom of the opening and closing piece (2);

the driving piece is arranged above the valve body (1) and is used for applying force to the opening and closing piece (2) to drive the opening and closing piece (2) to move between the exhaust position and the blocking position.

2. A micropressure valve assembly as set forth in claim 1, characterized in that: the opening and closing piece (2) is arranged in the exhaust channel (101), the driving piece comprises an electromagnet (3) with an electrifying state and a power-off state, the opening and closing piece (2) is made of magnetic materials, when the electromagnet (3) is in the electrifying state, the electromagnet (3) applies upward electromagnetic force to the opening and closing piece (2) to enable the opening and closing piece (2) to be in an exhaust position, and when the electromagnet (3) is in the power-off state, the electromagnetic force of the electromagnet (3) disappears to enable the opening and closing piece (2) to be in a blocking position under the action of gravity.

3. A micropressure valve assembly as claimed in claim 1 or 2, characterized in that: the valve body (1) comprises a first valve body and a second valve body, the first valve body is connected with the second valve body, and the second valve body (120) is arranged close to the upper surface of the opening and closing piece (2); the micropressure valve assembly further comprises a guide column (110), and at least part of the opening and closing piece and at least part of the guide column (110) are positioned in the accommodating cavity of the first valve body; a space is reserved between the side wall corresponding to the accommodating cavity of the first valve body and the outer peripheral surface of the opening and closing member, and the space between the side wall corresponding to the accommodating cavity of the first valve body and the outer peripheral surface of the opening and closing member forms part of the exhaust channel; the opening and closing piece (2) is sleeved outside the guide column (110) and is in sliding connection with the guide column (110); when the opening and closing piece (2) is at the exhaust position, the bottom of the second valve body (120) is abutted against the top of the opening and closing piece (2).

4. A micropressure valve assembly as set forth in claim 3, characterized in that: the guide column (110) is provided with a water inlet channel (105) extending along the axial direction of the guide column (110) and penetrating through the guide column, the top of the water inlet channel (105) is provided with a water inlet (106) communicated with the outside of the valve body (1), and the bottom of the water inlet channel (105) is provided with a water outlet (107) communicated with the outside of the valve body (1); the gas outlet comprises a first gas outlet, the water inlet (106) and the first gas outlet (103) are both arranged at the top of the second valve body, and the first gas outlet (103) circumferentially surrounds the water inlet (106).

5. A micropressure valve assembly as set forth in claim 1, characterized in that: the air outlet comprises a first air outlet and a second air outlet, the first air outlet (103) is formed at the top of the valve body (1), and the first air outlet is communicated with the exhaust channel and the outside of the top of the valve body; the second air outlet is communicated with the outside of the valve body (1) and the side part of the exhaust channel (101).

6. A micropressure valve assembly as set forth in claim 2, characterized in that: the bottom of the opening and closing piece (2) is in an inverted cone shape, a conical surface (130) matched with the end face of the bottom of the opening and closing piece (2) is arranged on the side wall of the lower portion of the exhaust channel (101), and when the opening and closing piece (2) is in a blocking position, the end face of the bottom of the opening and closing piece (2) is abutted to the conical surface (130).

7. A micropressure valve assembly as set forth in claim 1, characterized in that: the air outlet is formed at the top of the valve body; the opening and closing piece (2) is at least partially arranged outside the valve body (1) and above the air outlet, the driving piece comprises a power push rod (4) with a fixed end (401) and a movable end (402), the fixed end (401) of the power push rod (4) is fixedly connected with an external frame (10), the movable end (402) of the power push rod (4) is fixedly connected with the opening and closing piece (2), when the opening and closing piece (2) is in an exhaust position, a space is reserved between the bottom of the opening and closing piece (2) and the top of the valve body (1), and when the opening and closing piece (2) is in a blocking position, the bottom of the opening and closing piece (2) is abutted to the top of the valve body (1).

8. A micropressure valve assembly as set forth in claim 7, characterized in that: the number of the air outlets is not less than two, one air outlet is positioned at the top of the valve body (1) and adjacent to the axis of the valve body (1), and the other air outlet circumferentially surrounds the air outlet at the position adjacent to the axis of the valve body (1).

9. A micropressure valve assembly as set forth in claim 7, characterized in that: one of the bottom of the opening and closing piece (2) and the top of the valve body (1) is provided with a sealing piece (140), when the opening and closing piece (2) is in a blocking position, the sealing piece (140) is abutted against the other one of the bottom of the opening and closing piece (2) and the top of the valve body (1), and the sealing piece (140) circumferentially surrounds the outside of the first air outlet (103).

10. A cooking machine, its characterized in that: the cooking machine comprises a driving machine seat, a cooking cup assembly arranged on the driving machine seat and a cup cover assembly arranged on the cooking cup assembly in a covering mode, wherein the micro-pressure valve assembly according to any one of claims 1-9 is arranged on the cup cover assembly.