Cooking appliance and reversing valve therefor

Abstract

The present invention discloses a cooking utensil and a reversing valve for the cooking utensil. The cooking utensil comprises a machine body, a pot body and a feeding assembly. The machine body comprises a base, a solid material storage bin, a vacuum pump and a reversing valve. The pot body is placed on the base of the machine body in a removable manner. The feeding assembly comprises a solid material feeding channel and a vacuum channel and can move between an initial position and a feeding position, and the solid material feeding channel is connected to the solid material storage bin. The vacuum pump is connected to the solid material storage bin and the vacuum channel respectively through the reversing valve. At the feeding position, the solid material feeding channel and the vacuum channel can be connected to the cooking space of the pot body. The reversing valve is used to switch the on-off state of the vacuum pump and each channel. According to the present invention, the split design can reduce the volume and weight of the pot body and facilitate taking and placing. By switching the on-off state through the reversing valve, at least two spaces can be vacuumed separately by only one vacuum pump, which can reduce the number of parts, make the structure compact, and reduce production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and more particularly to a cooking appliance and a reversing valve used therefor. Background Art

[0002] Some cooking appliances such as rice cookers currently on the market have storage bins for storing rice and other ingredients, and can automatically transport the ingredients in the storage bins to the cooking space. Some cooking appliances also have a vacuum function, which can vacuum the cooking space to optimize the cooking effect. However, cooking appliances with a vacuum function usually have one vacuum pump corresponding to one space. If it is necessary to vacuum a space such as a storage bin, an additional vacuum pump needs to be set up. This will lead to an increase in costs. In addition, integrating a storage bin, multiple vacuum pumps, etc. on the same cooking appliance can easily cause the cooking appliance to be too large in size and weight, which is inconvenient to carry and affects user use.

[0003] To this end, the present invention provides a cooking appliance and a reversing valve therefor to at least partially solve the problems in the prior art. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present invention provides a cooking appliance, comprising:

[0006] A machine body, the machine body comprising a base, a solid material storage bin, a vacuum pump and a reversing valve, the vacuum pump being connected to the solid material storage bin through the reversing valve;

[0007] A pot body, the pot body being removably mounted on the base, a cooking space being formed in the pot body, and the cooking space having an interface communicating with the outside world; and

[0008] a feeding assembly, the feeding assembly having a solid material feeding channel and a vacuum channel, the feeding assembly being connected to the machine body and being movable between an initial position and a feeding position, one end of the solid material feeding channel being in communication with the solid material storage bin, one end of the vacuum channel being in communication with the vacuum pump via the reversing valve, and when the feeding assembly is located at the feeding position, the other ends of the solid material feeding channel and the other ends of the vacuum channel being respectively in communication with the cooking space via the interface;

[0009] The reversing valve is used to switch the on / off state between the vacuum pump, the solid material storage bin and the vacuum channel.

[0010] According to the cooking utensil of the present invention, the pot body and the machine body are set as a separate structure, and the vacuum pump, the material storage bin, the reversing valve, etc. are integrated on the machine body, which can reduce the volume and weight of the pot body and facilitate users to take and put. In addition, the on-off state between the vacuum pump and the material storage bin and the cooking space is switched by the reversing valve. Therefore, only one vacuum pump can be used to achieve vacuuming of at least two different spaces, which can reduce the number of parts, make the structure compact, and help reduce production costs.

[0011] Optionally, the reversing valve comprises:

[0012] a central passage having a first end and a second end;

[0013] a first branch pipe, the first branch pipe being in communication with the intermediate channel at the first end, and the first branch pipe being in communication with the solid material storage bin;

[0014] a second branch pipe, the second branch pipe being in communication with the intermediate channel at the second end, and the second branch pipe being in communication with the vacuum channel;

[0015] an air extraction pipe, the air extraction pipe being in communication with the intermediate passage between the first end and the second end, and the air extraction pipe being in communication with the vacuum pump; and

[0016] A switching pin having a first sealing portion and a second sealing portion and movable between a first position and a second position, wherein in the first position, the first sealing portion seals the first end of the intermediate passage and the second sealing portion is spaced from the second end, and in the second position, the second sealing portion seals the second end of the intermediate passage and the first sealing portion is spaced from the first end. Thus, the control method of the reversing valve is simple.

[0017] Optionally, the feeding assembly includes a feeding arm that is pivotally arranged, the solid material feeding channel and the vacuum channel are arranged in the feeding arm, wherein a driving unit is arranged on the feeding arm, and when the feeding arm is located at the initial position, the driving unit drives the switching pin to move to the second position, and when the feeding arm is located at the feeding position, the driving unit releases the driving action on the switching pin. Thus, the switching action of the switching pin is linked with the position state of the feeding arm, so that the automatic control of the reversing valve can be realized.

[0018] Optionally, an electromagnet is provided on the machine body, the switching pin is made of magnetic material, and the electromagnet is used to apply magnetic force to the switching pin so that the switching pin is located at the second position. Thus, the switching action of the switching pin is controlled by the electromagnet, and the control method is simple and easy to implement.

[0019] Optionally, the cooking appliance further comprises a detection device and a control device, the control device being electrically connected to the detection device and the electromagnet respectively, the detection device being used to detect the position of the feeding assembly and being configured to send an in-position signal to the control device when the feeding assembly moves to a position other than the feeding position, and the control device being configured to control the electromagnet to apply a magnetic force upon receiving the in-position signal. Thus, the switching action of the switching pin can be linked with the position state of the feeding arm to realize automatic control of the reversing valve.

[0020] Optionally, the reversing valve further comprises a biasing member, wherein the biasing member applies a biasing force from the second position toward the first position to the switching pin, thereby enabling the reversing valve to maintain a state in which the vacuum pump is connected to the storage bin.

[0021] Optionally, at least one of the first sealing portion and the second sealing portion is made of elastic material and configured as the biasing member. Thus, by using the sealing portion as the biasing member, the number of parts can be reduced, making the reversing valve easier to manufacture.

[0022] Optionally, the reversing valve is configured as a solenoid valve, which is easy to obtain, has a low cost, and is easy to control.

[0023] According to another aspect of the present invention, a reversing valve is provided for use in the above cooking appliance, the reversing valve comprising:

[0024] a central passage having a first end and a second end;

[0025] A first branch pipe, the first branch pipe is connected to the middle channel at the first end, and the first branch pipe is used to communicate with the solid material storage bin;

[0026] a second branch pipe, the second branch pipe being in communication with the intermediate channel at the second end, the second branch pipe being used to communicate with the vacuum channel;

[0027] an air extraction pipe, the air extraction pipe being in communication with the intermediate passage between the first end and the second end, the air extraction pipe being used to be in communication with the vacuum pump; and

[0028] A switching pin having a first sealing portion and a second sealing portion and movable between a first position and a second position, wherein in the first position, the first sealing portion seals the first end of the intermediate passage and the second sealing portion is spaced from the second end, and in the second position, the second sealing portion seals the second end of the intermediate passage and the first sealing portion is spaced from the first end.

[0029] The reversing valve according to the present invention has a simple structure, is easy to manufacture, and can be conveniently controlled by a switching pin, and is very suitable for the above-mentioned cooking utensils.

[0030] Optionally, the reversing valve further comprises a biasing member, wherein the biasing member applies a biasing force from the second position toward the first position to the switching pin, thereby enabling the reversing valve to be maintained in one of the two on-off states.

[0031] Optionally, at least one of the first sealing portion and the second sealing portion is made of elastic material and configured as the biasing member. Thus, by using the sealing portion as the biasing member, the number of parts can be reduced, making the reversing valve easier to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following drawings of the present invention are used to understand the present invention as part of the present invention. The embodiments of the present invention are shown in the drawings and the description thereof is used to explain the principle of the present invention.

[0033] In the attached figure:

[0034] Figure 1 A three-dimensional view of a cooking appliance according to a preferred embodiment of the present invention;

[0035] Figure 2 for Figure 1 A perspective view of a feed arm of the cooking appliance shown;

[0036] Figure 3 for Figure 1 A vertical cutaway view of the cooking appliance is shown with the feed arm in an initial position;

[0037] Figure 4 for Figure 1 Another vertical cutaway view of the cooking appliance shown, wherein the feed arm is in the feed position;

[0038] Figure 5 A three-dimensional view of a reversing valve according to a preferred embodiment of the present invention;

[0039] Figure 6 for Figure 5 A vertical cutaway view of the reversing valve shown with the switch pin in a first position; and

[0040] Figure 7 for Figure 5 Another vertical section through the directional control valve is shown, with the switch pin in the second position. DETAILED DESCRIPTION

[0041] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

[0042] In order to fully understand the embodiments of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.

[0043] The present invention provides a cooking utensil. The cooking utensil according to the present invention may be an electric rice cooker, an electric pressure cooker or other cooking utensil, and the cooking utensil according to the present invention may have various functions such as cooking porridge, boiling soup, and cooking in addition to the function of cooking rice. The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0044] like Figure 1 As shown, the cooking utensil 1 according to the present invention comprises a body 10 and a pot body 20. The body 10 is used to form the main frame structure of the cooking utensil 1, and is provided with a base 11. The pot body 20 can be placed on the base 11 and can be removed from the base 11. That is, the pot body 20 and the body 10 are arranged in a detachable manner to facilitate the movement of the pot body 20. Therefore, the cooking utensil according to the present invention is constructed as a split cooking utensil. In addition, the body 10 is also provided with a storage bin 12. The storage bin 12 may include a solid material storage bin, which can be used to accommodate solid food materials such as rice and beans required for cooking. Further, the storage bin 12 may also include a liquid material storage bin for accommodating liquids such as water.

[0045] like Figure 2 As shown, the pot body 20 includes a pot body seat 21, a pot body cover 22 and an inner pot 23 disposed in the pot body seat 21. The pot body seat 21 is detachably seated on the base 11 of the machine body 10. The inner pot 23 is removably placed in the pot body seat 21. When the pot body cover 22 is closed on the pot body seat 21, a cooking space 24 is formed between the pot body cover 22 and the inner pot 23.

[0046] Furthermore, the cooking appliance 1 further includes a feeding assembly 30. The feeding assembly 30 is used to transport the food and / or water in the storage bin 12 to the cooking space 24 of the pot body 20. For example, the feeding assembly 30 can automatically add a predetermined amount of food and / or water to the cooking space 24 according to the user's operation instruction, thereby automating the entire cooking process.

[0047] like Figure 2 As shown, in this embodiment, the feeding assembly 30 may include a feeding arm 31, which has a feeding channel 32 extending along its length direction. It can be understood that the feeding channel 32 may include a solid material feeding channel 33 for conveying food materials and a liquid material feeding channel 34 for conveying water or other liquid materials. The feeding arm 31 is connected to the body 10, and the solid material feeding channel 33 is communicated with the solid material storage bin, and the liquid material feeding channel 34 is communicated with the liquid material storage bin.

[0048] According to the present invention, the feeding arm 31 is movably arranged. Figure 4 As shown, the feeding arm 31 can be moved to a position where it docks with the pot body 20 to feed materials into the cooking space 24. This position can be called a feeding position. The pot body 20 is provided with an interface 25 that communicates with the cooking space 24. When the feeding arm 31 moves to the feeding position, the feeding channel 32 can be connected with the cooking space 24 of the pot body 20 through the interface 25, so as to facilitate the feeding of food and / or water as needed.

[0049] In addition, if Figure 1 and Figure 3 As shown, when it is not necessary to convey materials into the cooking space 24, the feeding arm 31 can be moved from the feeding position to a position away from the pot body 20. Thus, there is a large take-and-place space around the pot body 20. The user can conveniently remove the pot body 20 from the base 11, or place the pot body 20 on the base 11. The position of the feeding arm 31 away from the pot body 20 can be the initial position.

[0050] In this embodiment, when the pot body 20 is located on the base 11, the material storage bin 12 is preferably located above the pot body 20. When the feeding assembly 30 is located at the feeding position, the feeding channel 32 connects the material storage bin 12 with the cooking space 24 in a generally inclined posture. In this way, the material can be automatically transported by gravity. Preferably, when the feeding assembly 30 is located at the feeding position, the angle between the feeding channel 32 and the horizontal plane can be 15°-90°. Depending on the specific conditions such as the size of the cooking utensil and the type of material being transported, the above angle can be 30°, 45°, 60°, 75° or any value within the above range.

[0051] In addition, the feed arm 31 is preferably arranged to be pivotally movable around a pivot axis extending substantially horizontally. In other words, the feed arm 31 moves between the storage position and the feed position in a manner of swinging up and down. Therefore, preferably, the interface 25 of the cooking space 24 is arranged at the top of the pot body 20 to facilitate docking with the feed channel 32. In other words, the interface 25 is preferably arranged on the pot body cover 22. Further preferably, the pivot axis is located at one end of the feed arm 31. As a result, the feed arm 31 has a larger swing radius and a larger range of movement, so that the initial position can be set to a position farther away from the pot body 20, further increasing the pick-up and placement space around the pot body 20.

[0052] Although not shown in the drawings, the cooking device according to the present invention may further include a vacuum pump. The vacuum pump is disposed on the body and may be connected to the solid material storage bin to evacuate the solid material storage bin, so that the pressure in the solid material storage bin is lower than a predetermined pressure (e.g., atmospheric pressure) to form a vacuum environment. Thus, rice, beans and other food materials can be stored in a vacuum environment, which can slow down their oxidation process and keep them dry, which is conducive to the long-term preservation of the food materials.

[0053] Furthermore, if Figure 2 As shown, a vacuum channel 35 may also be provided on the feeding arm 31. A vacuum pump may be connected to the vacuum channel 35. Figure 4 When the feeding position is shown, the vacuum channel 35 can be connected to the cooking space 24 through the interface 25. Therefore, the vacuum pump can also evacuate the cooking space 24 to make the pressure in the cooking space 24 lower than the predetermined pressure (such as atmospheric pressure) to form a vacuum environment. For example, evacuating the cooking space 24 during the water absorption stage can speed up the water absorption process and increase the degree of water absorption, which can improve the taste of the cooked food.

[0054] In addition, the cooking appliance further includes a reversing valve 40. The vacuum pump is connected to the solid material storage bin and the vacuum channel 35 respectively through the reversing valve 40. The reversing valve 40 can switch the on-off state of the vacuum pump and the two, so that when the vacuum pump is connected to the solid material storage bin, the vacuum pump is disconnected from the vacuum channel 35 of the feeding arm 31; and when the vacuum pump is connected to the vacuum channel 35, the vacuum pump is disconnected from the solid material storage bin. Therefore, through the reversing valve 40, only one vacuum pump is needed to realize the vacuuming of different spaces.

[0055] Figures 5 to 7The figure shows a reversing valve 40 according to a preferred embodiment of the present invention. The reversing valve 40 includes a valve seat 41, a first cover 42, a second cover 43 and a switching pin 44. The valve seat 41 has an intermediate passage 411 inside, which has a first end 412 and a second end 413 opposite to each other. The valve seat 41 has an air extraction pipe 45. The air extraction pipe 45 is connected to the intermediate passage 411 between the first end 412 and the second end 413.

[0056] The first cover 42 has a first branch pipe 46. The first cover 42 is connected to the valve seat 41 so that the first branch pipe 46 communicates with the middle passage 411 via the first end 412. Thus, the air extraction pipe 45 can communicate with the first branch pipe 46 through the middle passage 411.

[0057] In addition, a second branch pipe 47 is also provided on the valve seat 41. The second cover 43 is connected to the valve seat 41 and forms a space with the valve seat 41, so that the second branch pipe 47 is connected to the middle channel 411 via the space and the second end 413. Thus, the exhaust pipe 45 can be connected to the second branch pipe 47 through the middle channel 411.

[0058] The switching pin 44 is disposed in the intermediate channel 411 and has a columnar body and a first sealing portion 441 and a second sealing portion 442 disposed on the columnar body. The switching pin 44 is configured to be movable between a first position and a second position along the extension direction of the intermediate channel 411. Figure 6 As shown, in the first position, the first sealing portion 441 seals the first end 412 of the intermediate channel 411, and the second sealing portion 442 is spaced from the second end 413. At this time, the exhaust pipe 45 is disconnected from the first branch pipe 46 and connected to the second branch pipe 47. Figure 7 As shown, in the second position, the second sealing portion 442 seals the second end 413 of the intermediate channel 411, and the first sealing portion 441 is spaced from the first end 412. At this time, the exhaust pipe 45 is connected to the first branch pipe 46 and disconnected from the second branch pipe 47.

[0059] Thus, by controlling the switching pin 44 to be located at the first position or the second position, the on-off state of different channels of the reversing valve 40 can be realized. When applied to the above-mentioned cooking appliance 1, the exhaust pipe 45 can be connected to the vacuum pump, the first branch pipe 46 can be connected to the solid material storage bin, and the second branch pipe 47 can be connected to the vacuum channel 35 of the feeding arm 31. When it is necessary to evacuate the solid material storage bin, the switching pin 44 of the reversing valve 40 can be moved to the second position, so that the exhaust pipe 45 is connected to the first branch pipe 46 and disconnected from the second branch pipe 47. At this time, the vacuum pump is only connected to the solid material storage bin. When it is necessary to evacuate the cooking space 24, the switching pin 44 of the reversing valve 40 can be moved to the first position, so that the exhaust pipe 45 is connected to the second branch pipe 47 and disconnected from the first branch pipe 46. At this time, the vacuum pump is only connected to the vacuum channel 35.

[0060] It can be understood that when the cooking space 24 is evacuated, the feeding arm 31 (or the feeding assembly 30) must be located at the feeding position, so that the vacuum channel 35 is connected to the cooking space 24. Therefore, preferably, the cooking appliance 1 can be configured to control the position of the switching pin 44 of the reversing valve 40 according to the position state of the feeding assembly 30. That is, the on-off state of the reversing valve 40 is linked according to the change of the position of the feeding assembly 30, thereby realizing automatic control.

[0061] Specifically, Figure 3 and Figure 4 As shown, the feeding arm 31 is provided with a driving part 36, which can be specifically constructed as a protrusion protruding outward from the feeding arm 31. The reversing valve 40 is arranged adjacent to the feeding arm 31 where the driving part 36 is arranged. And the positional relationship between the two is arranged as follows:

[0062] When the feeding arm 31 is at the initial position, the driving unit 36 ​​presses the switching pin 44 to drive it to move to the second position (eg, Figure 3 At this time, the vacuum pump is connected to the solid material storage bin through the air extraction pipe 45 and the first branch pipe 46, and is disconnected from the vacuum channel 35.

[0063] When the feeding arm 31 is at the feeding position, the driving part 36 moves to a position spaced apart from the switching pin 44 and does not exert any force on the switching pin 44 (such as Figure 4 As shown). Preferably, the reversing valve 40 may further include a biasing member. The biasing member may apply a biasing force from the second position toward the first position to the switching pin 44, so that the switching pin 44 is located at the first position in a free state. Thus, when the driving part 36 does not apply force to the switching pin 44, the switching pin 44 automatically moves to the first position. At this time, the vacuum pump is connected to the vacuum channel 35 through the exhaust pipe 45 and the second branch pipe 47, and is disconnected from the solid material storage bin.

[0064] Preferably, at least one of the first sealing portion 441 and the second sealing portion 442 of the switching pin 44 can be set as a sealing member made of an elastic material, such as a rubber or silicone material, which has good sealing performance while being elastic. In this way, the first sealing portion 441 and / or the second sealing portion 442 can be used as the above-mentioned biasing member. Thereby, the number of parts can be reduced and the structure of the reversing valve 40 can be simplified.

[0065] As an alternative embodiment, the switching pin can also be driven to move between the first position and the second position by other driving members. For example, the switching pin can be made of magnetic materials such as iron, cobalt, nickel, etc., and the driving member can be constructed as an electromagnet. When the electromagnet is powered on, it applies a magnetic force to the switching pin, so that the switching pin moves to the second position. When the electromagnet is powered off, the switching pin loses the effect of the magnetic force and automatically moves to the first position under the action of the bias force.

[0066] Further, in order to facilitate the control of the working state of the electromagnet, preferably, the cooking utensil is also provided with a detection device, which is used to detect the position state of the feeding assembly. And the cooking utensil also includes a control device, which is electrically connected to the detection device and the electromagnet respectively. When the feeding assembly is located at the feeding position, the detection device sends a first in-place signal to the control device, and the control device controls the electromagnet to be powered off according to the first in-place signal, and the switching pin is located at the first position. The vacuum pump can be connected to the vacuum channel through the exhaust pipe and the second branch pipe, and is disconnected from the solid material storage bin. When the feeding assembly is located at the initial position, the detection device sends a second in-place signal to the control device, and the control device controls the electromagnet to be powered on and generate magnetic force according to the second in-place signal, and the switching pin moves to the second position under the action of the magnetic force. The vacuum pump can be connected to the solid material storage bin through the exhaust pipe and the first branch pipe, and is disconnected from the vacuum channel. The detection device can specifically include detection elements such as micro switches, photoelectric switches and / or Hall switches, and corresponding trigger elements.

[0067] In fact, when the feeding assembly is located at any other position except the feeding position, the vacuum pump cannot be communicated with the cooking space. Therefore, the detection device can also be configured to send a second arrival signal to the control device when the feeding assembly moves away from the feeding position.

[0068] In addition, it can be understood that, as an alternative embodiment, a three-way or multi-way solenoid valve can be used to connect the vacuum pump to the solid material storage bin, the vacuum channel and / or other spaces that need to be evacuated, and the vacuum pump can be controlled by the solenoid valve to connect to these spaces separately.

[0069] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" and the like appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0070] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A cooking utensil, characterized in that: The cooking appliance comprises: A machine body (10), the machine body (10) comprising a base (11), a solid material storage bin, a vacuum pump and a reversing valve (40), the vacuum pump being in communication with the solid material storage bin via the reversing valve (40); A pot body (20), the pot body (20) being removably mounted on the base (11), a cooking space (24) being formed in the pot body (20), and the cooking space (24) having an interface (25) communicating with the outside; and A material conveying component (30), the material conveying component (30) having a solid material conveying channel (33) and a vacuum channel (35), the material conveying component (30) being connected to the machine body (10) and being capable of moving between an initial position and a material conveying position, one end of the solid material conveying channel (33) being in communication with the solid material storage bin, one end of the vacuum channel (35) being in communication with the vacuum pump via the reversing valve (40), and when the material conveying component (30) is located at the material conveying position, the other end of the solid material conveying channel (33) and the other end of the vacuum channel (35) are capable of being respectively in communication with the cooking space (24) via the interface (25); The reversing valve (40) is used to switch the on / off state between the vacuum pump, the solid material storage bin and the vacuum channel (35).

2. The cooking device according to claim 1, characterized in that: The reversing valve (40) comprises: A middle channel (411), the middle channel (411) having a first end (412) and a second end (413); a first branch pipe (46), wherein the first branch pipe (46) is in communication with the intermediate channel (411) at the first end (412), and the first branch pipe (46) is in communication with the solid material storage bin; a second branch pipe (47), wherein the second branch pipe (47) is connected to the intermediate channel (411) at the second end (413), and the second branch pipe (47) is connected to the vacuum channel (35); an air extraction pipe (45), the air extraction pipe (45) being in communication with the intermediate passage (411) between the first end (412) and the second end (413), and the air extraction pipe (45) being in communication with the vacuum pump; and A switching pin (44), wherein the switching pin (44) has a first sealing portion (441) and a second sealing portion (442) and is movable between a first position and a second position, wherein, in the first position, the first sealing portion (441) seals the first end (412) of the intermediate channel (411), and the second sealing portion (442) is spaced from the second end (413), and in the second position, the second sealing portion (442) seals the second end (413) of the intermediate channel (411), and the first sealing portion (441) is spaced from the first end (412).

3. The cooking device according to claim 2, characterized in that: The feeding assembly (30) includes a feeding arm (31) that is pivotally arranged, and the solid material feeding channel (33) and the vacuum channel (35) are arranged in the feeding arm (31), wherein a driving part (36) is arranged on the feeding arm (31), and when the feeding arm (31) is located at the initial position, the driving part (36) drives the switching pin (44) to move to the second position, and when the feeding arm (31) is located at the feeding position, the driving part (36) releases the driving action on the switching pin (44).

4. The cooking device according to claim 2, characterized in that: An electromagnet is arranged on the machine body, the switching pin (44) is made of magnetic material, and the electromagnet is used to apply a magnetic force to the switching pin (44) so ​​that the switching pin (44) is located at the second position.

5. The cooking device according to claim 4, characterized in that: The cooking appliance further comprises a detection device and a control device, wherein the control device is electrically connected to the detection device and the electromagnet respectively, the detection device is used to detect the position of the feeding assembly and is configured to send an in-position signal to the control device when the feeding assembly (30) moves to a position other than the feeding position, and the control device is configured to control the electromagnet to apply a magnetic force upon receiving the in-position signal.

6. The cooking device according to any one of claims 2 to 5, characterized in that: The reversing valve (40) further includes a biasing member that applies a biasing force to the switching pin (44) from the second position toward the first position.

7. The cooking device according to claim 6, characterized in that: At least one of the first sealing portion (441) and the second sealing portion (442) is made of an elastic material and configured as the biasing member.

8. The cooking device according to claim 1, characterized in that: The directional control valve is designed as a solenoid valve.

9. A reversing valve, used in the cooking appliance according to claim 1, characterized in that: The reversing valve comprises: A middle channel (411), the middle channel (411) having a first end (412) and a second end (413); a first branch pipe (46), the first branch pipe (46) being in communication with the intermediate channel (411) at the first end (412), the first branch pipe (46) being used for communicating with the solid material storage bin; a second branch pipe (47), the second branch pipe (47) being in communication with the intermediate channel (411) at the second end (413), the second branch pipe (47) being used to communicate with the vacuum channel (35); an air extraction pipe (45), the air extraction pipe (45) being in communication with the intermediate passage (411) between the first end (412) and the second end (413), the air extraction pipe (45) being used to be in communication with the vacuum pump; and A switching pin (44), wherein the switching pin (44) has a first sealing portion (441) and a second sealing portion (442) and is movable between a first position and a second position, wherein, in the first position, the first sealing portion (441) seals the first end (412) of the intermediate channel (411), and the second sealing portion (442) is spaced from the second end (413), and in the second position, the second sealing portion (442) seals the second end (413) of the intermediate channel (411), and the first sealing portion (441) is spaced from the first end (412).

10. The reversing valve according to claim 9, characterized in that: The reversing valve further includes a biasing member that applies a biasing force to the switching pin (44) from the second position toward the first position.

11. The reversing valve according to claim 10, characterized in that: At least one of the first sealing portion (441) and the second sealing portion (442) is made of an elastic material and configured as the biasing member.

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