CN211795796U

CN211795796U - Cooking utensil

Info

Publication number: CN211795796U
Application number: CN201921292308.2U
Authority: CN
Inventors: 吕华; 李泽涌
Original assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Current assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority date: 2019-02-02
Filing date: 2019-08-09
Publication date: 2020-10-30
Anticipated expiration: 2029-08-09
Also published as: CN211408564U; CN111513540A; CN111513538A; CN211795799U; CN211795800U; CN211984938U; CN211408560U; CN111513546A; CN111513542B; CN111513545A; CN211483989U; CN111513540B; CN111513545B; CN111513543B; CN211408561U; CN211408558U; CN211483984U; CN211795798U; CN211795797U; CN111513542A

Abstract

The utility model provides a cooking utensil, which comprises a pot body, a cover body and a steam generating device. An inner pot is arranged in the cooker body. The cover body is arranged on the cooker body in an openable and closable manner and forms a cooking space with the inner pot when the cooker body is covered. The steam generating device is provided in the cover body and used for generating steam for assisting cooking, and comprises a water container for containing water to be heated to generate steam and a containing cavity. The water container is removably disposed in the receiving cavity and is capable of communicating with the cooking space through the steam passage to introduce steam into the cooking space. The receiving cavity is provided with a sealing structure and/or a drainage structure to avoid water entering the receiving cavity from flowing into the cover body to contact with the electrical component. According to the utility model discloses, steam generator's the chamber that holds is provided with seal structure and/or the structure of releasing, and seal structure can seal the gap that holds the chamber, and the structure of releasing can guide water to release to safe position to inside avoiding getting into the rivers income lid that holds the chamber.

Description

Cooking utensil

Technical Field

The utility model discloses generally relate to the technical field of cooking utensil equipment.

Background

Currently, some cooking appliances (such as rice cookers) on the market are provided with steam generation devices capable of generating additional steam to assist in cooking. Generally, the steam generating device is provided in a pot of the cooking appliance. When the cover is opened, the container for containing water of the steam generating device can be observed, and the user can carry out operations such as water adding and the like. The cooker body of this kind of cooking utensil still needs to set up the space that is used for holding steam generator under the prerequisite in the space of pot in guaranteeing to hold to lead to holistic size great, be difficult for placing and carrying, bring certain puzzlement for user's use.

In this regard, the applicant has devised a cooking appliance in which a steam generating device is provided in a cover body to reduce the size of the cooking appliance. The steam cup for containing the water for generating the steam is arranged in the containing cavity of the cover body in a removable mode, and is convenient to clean and replace. However, there are cases where the user forgets to replace the steam cup after taking it out. At this time, if water is added to the position of the steam cup, the water enters the accommodating cavity and flows into the cover body through the gap. In addition, when the seal between the cup cover for covering the steam cup and the steam cup is damaged, steam leakage is easy to occur. The leaking steam also enters the cover body through the gap and may re-condense to water. Once water comes into contact with electrical components, such as heating devices, it is susceptible to danger and damage when energized.

Accordingly, there is a need for a cooking appliance that at least partially solves the problems of the prior art.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

To solve the above problem at least in part, the present invention provides a cooking appliance, comprising:

the cooker body is internally provided with an inner pot;

the cover body is arranged on the cooker body in an openable and closable manner, and when the cooker body is covered by the cover body, a cooking space is formed between the cover body and the inner pot; and

a steam generating device provided in the cover and for generating steam for assisting cooking, the steam generating device including a water container for containing water to be heated to generate steam, and a receiving chamber in which the water container is removably provided and communicable with the cooking space through a steam passage to introduce the steam into the cooking space;

wherein the receiving cavity is provided with a sealing structure and/or a drainage structure to avoid water entering the receiving cavity from flowing into the cover body to contact with the electrical component.

According to the utility model discloses a cooking utensil, steam generator's the chamber that holds is provided with seal structure and/or the structure of releasing, and seal structure can seal the gap that holds the chamber, and the structure of releasing can guide water to release to safe position to inside avoiding getting into the rivers income lid that holds the chamber.

Optionally, the steam generating device further comprises:

the heating device is arranged below the water container so as to heat the water container;

the bracket is arranged at the opening of the water container and surrounds the water container; and

a supporter supported between the heating device and the supporter in an up-down direction and surrounding the water container;

wherein the heating device, the bracket and the support piece jointly enclose the accommodating cavity. Therefore, the steam generating device has a compact structure, and is beneficial to reducing the whole size of the cover body.

Optionally, the sealing structure comprises a first sealing ring disposed between the heating device and the support, and/or a second sealing ring disposed between the support and the bracket. Thereby, a sealing function can be achieved by the first sealing ring and/or the second sealing ring.

Optionally, the supporting member is made of a flexible material and is disposed to be pressed in an up-down direction, and the sealing structure includes the supporting member. Therefore, the supporting piece made of flexible materials can be used for sealing, and the number of parts is reduced.

Optionally, one of the end surfaces of the bracket and the supporting member, which are connected to each other, is provided with a groove, and the other end surface of the bracket and the supporting member is provided with a convex rib, and the bracket and the supporting member are connected in a manner of inserting the groove and the convex rib. The grooves and ribs may thereby enhance the seal.

Optionally, a concave deformable portion is provided on an end surface of the support member contacting the heating device. Thus, the deformable portion can be deformed when receiving a pressure, and the sealing property of the joint surface between the support and the heating device is enhanced.

Optionally, a through water leakage hole is formed in a position, below the water container, of the heating device, and the drainage structure includes the water leakage hole. Therefore, water entering the accommodating cavity can be discharged to a safe position through the water leakage hole.

Optionally, a heat insulation board is arranged at a position, below the heating device, of the cover body, the water leakage hole penetrates through the heat insulation board, and a third sealing ring surrounding the water leakage hole is arranged between the heating device and the heat insulation board. Therefore, water can be prevented from entering between the heating device and the heat insulation plate.

Optionally, the cover body includes an inner liner and a detachable cover detachably connected to the inner liner, the steam generating device is provided in the inner liner, and the detachable cover covers the water leakage hole in a state where the detachable cover is connected to the inner liner. Thus, a small amount of water can be received with the removable cover.

Optionally, a first steam channel is arranged in the cover body, and the water container can be communicated with the cooking space through the first steam channel so as to guide the steam into the cooking space; and/or a micro-pressure air outlet channel is arranged in the cover body, and the cooking space can be communicated with the outside through the micro-pressure air outlet channel;

wherein the first steam channel and/or the micro-pressure air outlet channel are arranged close to the accommodating cavity, and the first steam channel and/or the micro-pressure air outlet channel are lower than the opening of the accommodating cavity. Therefore, water overflowing from the accommodating cavity can enter the cooking space through the first steam channel and/or the micro-pressure air outlet channel, so that the water is prevented from entering the inside of the cover body.

Drawings

The following drawings of the embodiments of the present invention are provided as a part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a perspective view of a cooking appliance according to a first embodiment of the present invention;

FIG. 2 is a perspective view of the lid of the cooking appliance shown in FIG. 1;

FIG. 3 is a side elevational view, partially in section, of the cover shown in FIG. 2;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

fig. 5 is a partially cut-away view of a cover of a cooking appliance according to a second embodiment of the present invention; and

fig. 6 is a partially cut-away view of a cover of a cooking appliance according to a third embodiment of the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring embodiments of the present invention.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.

As shown in fig. 1, the cooking appliance 1 according to the present invention may include a pot body 40 and a lid body 10. The pot body 40 may be substantially configured in a rounded rectangular parallelepiped shape, and an inner pot 41 is provided inside thereof. The inner pot 41 may be configured to be removably disposed in the pot body 40. For example, in one embodiment, the pot body 40 may be provided with a cylindrical inner pot receiving portion, and the inner pot 41 may be freely put into or taken out of the inner pot receiving portion. The removable arrangement allows the user to easily remove the inner pot 41 for cleaning. Of course, in other embodiments, the inner pot 41 may be fixedly provided in the pot body 40 in a non-removable manner. The pot body 40 is also usually provided therein with a heating means for heating the inner pot 41.

As shown in fig. 1, the lid body 10 is provided to the pot body 40 in a manner openable and closable. Therefore, the lid body 10 generally has a shape conforming to the shape of the pot body 40, so that the pot body 40 can be easily covered. When the lid body 10 is opened with respect to the pot body 40, the opening of the inner pot 41 in the pot body 40 is exposed, and the user can add food materials to the inner pot 41 or take cooked food out of the inner pot 41. When the lid body 10 is closed on the pot body 40, it covers the inner pot 41 and forms a cooking space with the inner pot 41. A sealing member is further provided between the cover body 10 and the inner pot 41 to maintain a good sealing property of the cooking space.

According to the utility model discloses a cooking utensil 1 still is provided with steam generator. As shown in fig. 2, a steam generating device 20 for generating steam for assisting cooking is provided in the cover 10. Accordingly, as shown in fig. 4, a first steam passage 11 is provided on the cover 10. In a state where the lid body 10 covers the pot body 40, the steam generating device 20 can communicate with the cooking space through the first steam passage 11 so as to introduce steam into the cooking space for assisting cooking.

Taking an electric cooker as an example, the specific operation of the auxiliary cooking may be to introduce the steam generated by the steam generating device 20 into the cooking space during the cooking process, and heat the rice from above, so that the rice can be uniformly heated, and the heating efficiency is improved; alternatively, after the rice is cooked, the steam generated by the steam generator 20 may be introduced into the cooking space to keep the rice warm, fresh, and moist, thereby maintaining a good taste.

Specifically, as shown in fig. 2 to 4, in the present embodiment, the steam generating device 20 includes two parts, namely, a steam generating component 21 and a steam sealing component 22.

The steam generating assembly 21 comprises a steam generating chamber for containing water to be heated to generate steam. According to the present invention, the steam generating chamber is formed by the inner receiving space of the water container 23. The steam generating assembly 21 further comprises a receiving cavity 27 for receiving the water container 23, which is configured as a recessed chamber formed in the steam generating device 20. The water container 23 is removably disposed in the accommodating chamber 27. The user can conveniently take out the water container 23 for washing or replacement.

The steam sealing assembly 22 is connected to the cover 10 and can be opened and closed with respect to the water container 23. Fig. 3 and 4 show the steam seal 22 in a closed state, in which the steam seal 22 closes the water container 23. The steam containment assembly 22 is shown in an open state in fig. 2. The user can observe the water level and the degree of cleaning (whether scale is present, etc.) in the water container 23 by opening the steam sealing member 22, and then decide whether to perform operations such as adding water or washing the water container 23.

In one embodiment, the steam closure assembly 22 may be configured in the form of a steam cover plate 25, and the steam cover plate 25 is provided with a seal 26 at a location corresponding to the water container 23 on the side facing the water container 23. When the steam-tight assembly 22 is in the closed state, the sealing member 26 is sandwiched between the steam cover plate 25 and the edge of the water container 23 to perform a sealing function, thereby preventing steam from leaking.

In order to guide the steam generated in the water container 23 into the cooking space in a state where it is sealed by the sealing member 26, a second steam passage 251 is provided on the steam cover plate 25. The second steam passage 251 has a second steam inlet 252 and a second steam outlet 253. It will be appreciated that the second steam inlet 252 is located within the sealing area of the seal 26 and the second steam outlet 253 is located outside the sealing area of the seal 26. When the steam enclosure assembly 22 is in the closed state, the second steam outlet 253 interfaces with a first steam inlet (not shown) of the first steam channel 11. As shown in fig. 4, the steam generated in the water container 23 can flow into the second steam passage 251 through the second steam inlet 252, continue to flow, and enter the first steam passage 11 through the butted second steam outlet 253 and first steam inlet. And finally flows out of the first steam outlet 112 of the first steam channel 11 into the cooking space under the cover 10.

Furthermore, the steam generating assembly 21 comprises heating means for heating the water in the water container 23 to generate steam. Therefore, the heating means may be preferably disposed below or at a side of the water container 23. As shown in fig. 4, in the present embodiment, the heating device 24 is configured to include a heating pan 241 and an electric heating tube 242. Wherein the heating pan 241 includes a bottom wall and a side wall extending upward from an edge of the bottom wall. Thereby, the bottom wall and the side wall surround the water container 23 from below and the side of the water container 23. The electric heating tube 242 is disposed in the heating plate 241. In the illustrated embodiment, the electric heating tube 242 is disposed inside a sidewall of the heating pan 241. However, the electric heating tube 242 may be provided in the bottom wall of the heating pan 241, or the electric heating tube 242 may be provided in both the side wall and the bottom wall. Of course, the heating device can also be configured in other forms, such as an electromagnetic heating device or the like.

As shown in fig. 3 and 4, a bracket 29 is further provided at an upper portion of the water container 23. A bracket 29 is provided around the water container 23 to serve as a support for the fixed water container 23. Between the holder 29 and the heating device 24, a support 28 is arranged. The support 28 is also disposed around the water container 23 and supported between the bracket 29 and the heating unit 24 in the up-down direction. On the one hand, the water container 23 is fixed, and on the other hand, the bracket 29 is separated from the heating device 24, so that the heat insulation effect is realized. Therefore, the supporting member 28 may be made of a material having a small heat transfer coefficient. In this way, the heating device 24, the support 28 and the bracket 29 together enclose a receiving chamber 27 for receiving the water container 23.

If water enters the housing cavity 27 for human or non-human reasons, there is a risk that water enters the inside of the cover 10 through gaps between the respective components and comes into contact with the electrical components. Therefore, according to the present invention, a sealing structure is provided in the housing chamber 27 to prevent water entering therein from flowing out to come into contact with the electric component.

As shown in fig. 3 and 4, in the first embodiment, the sealing structure includes a first sealing ring 301 provided between the heating device 24 and the support 28, which seals a first gap between the heating device 24 and the support 28. When water enters the receiving chamber 27, the gap which the water first contacts is the first gap between the heating device 24 and the supporting member 28. The first sealing ring 301 prevents water from flowing out through this gap, thereby waiting for the user to clean it in time when he finds that there is water in the receiving chamber 27.

Further, the sealing structure further includes a second sealing ring 302 disposed between the support 28 and the bracket 29, which seals a second gap between the support 28 and the bracket 29. It is further possible to reach the second aperture when the water level has exceeded the first aperture and has continued to rise. The second sealing ring 302 prevents water from flowing out of the second slit, thereby waiting for a user to clean the water in the accommodating chamber 27 in time.

When water continuously enters the accommodating chamber 27, the water cannot flow out due to the sealing action of the first sealing ring 301 and the second sealing ring 302. The water level in the accommodating chamber 27 continues to rise. The end result is that water escapes through the opening of the receiving chamber 27. Preferably, the first steam passage 11 is disposed adjacent to the accommodating chamber 27, and the first steam inlet of the first steam passage 11 is lower than the opening of the accommodating chamber 27. I.e. the first steam channel 11 is entirely below the opening of the receiving chamber 27. Thus, the water overflowing from the accommodating chamber 27 can flow to the lower position of the first steam passage 11 and enter into the cooking space through the first steam passage 11, and finally remain in the inner pot 41. Thereby, water can be prevented from entering the cover 10 and coming into contact with the electrical components.

Further, as shown in fig. 2 to 4, a third steam passage 12 is further provided on the cover 10. When the lid body 10 covers the pot body 40, the cooking space may communicate with the outside, for example, the outside atmosphere, through the third steam passage 12. Wherein the third steam passage 31 may be configured as a labyrinth or in communication with a steam valve having a labyrinth-like steam passage. Therefore, the cooking space can keep slight pressure relative to the outside, and the anti-overflow function can be realized. Thus, third vapor channel 12 may also be referred to as a micropressure outlet channel 12.

Preferably, the micro-pressure air outlet channel 12 can also be arranged at a position adjacent to the accommodating cavity 27, and the steam outlet thereof is lower than the opening of the accommodating cavity 27. In other words, the entire micro-pressure outlet channel 12 is lower than the opening of the receiving cavity 27. Thus, water overflowing from the receiving cavity 27 can also enter the cooking space through the minute pressure air outlet passage 12 and finally remain in the inner pot 41, thereby preventing water from entering the cover 10 and contacting the electrical components.

As shown in fig. 5, according to the second embodiment of the present invention, the first seal ring between the heating device and the support member and the second seal ring between the support member and the bracket may be eliminated, and the support member itself may be used as the sealing structure.

In this embodiment, the supporting member 228 is made of a flexible material, such as rubber or silicone. The support 228 is disposed between the holder 29 and the heating device 24 in the up-down direction and is pressed to perform a sealing function. Thus, the second gap between the support 228 and the bracket 29 and the second gap between the support 228 and the heating device 24 are both sealed by the support 228 itself. Thereby eliminating the need for a separate seal and reducing the number of parts.

Preferably, as shown in fig. 5, on the end surface of the support 228 that meets the heating device 24, a concave deformable portion 293 is provided. The deformable portion 293 may have a V-shape or a U-shape in cross section, for example. Thus, when the pressing force is applied, the deformable portion 293 is deformed, and the support 228 and the heating device 24 are always in close contact with each other. This can improve the sealing performance.

In addition, a groove 292 is provided on one of the end surfaces of the support member 228 that meets the bracket 29, and a rib 291 is provided on the other. In this embodiment, the ribs 291 are provided on the bracket 29 and the grooves 292 are provided on the support 228. The support 228 and the bracket 29 are connected by means of the rib 291 inserted into the groove 292. This connection may improve the sealing of the gap between the support 228 and the bracket 29. Preferably, the groove 292 and the rib 291 may be configured to extend one round in a circumferential direction around the water container.

It will be appreciated that the two configurations described above for enhancing sealing performance are applicable to both end faces of the support 228, with sufficient area of the engagement face.

As shown in fig. 6, according to the third embodiment of the present invention, a release structure may be further provided in the accommodating chamber, so that water entering the accommodating chamber is guided to be released to a safe position, and the water can be prevented from entering the inside of the cover body and contacting with the electric component. For example, the drainage structure may be configured in the form of a water leakage hole through which water flows.

It will be appreciated that the heating means constitutes the lowermost position of the receiving chamber 27. The water is initially accumulated at the location of the heating means when it enters the housing chamber 27. Therefore, a water leakage hole 243 is provided at a position of the heating device below the water container. Specifically, in the present embodiment, the water leakage hole 243 is provided through the bottom wall of the heating plate 241 a. When water enters the accommodating chamber 27, the water flows out through the water leakage holes 243, and is prevented from being accumulated in the accommodating chamber 27. The water leakage hole 243 may communicate with the cooking space such that water flowing out through the water leakage hole 243 enters the cooking space and remains in the inner pot.

The cover is typically constructed in a form that includes an inner liner and a removable cover. Wherein the steam generating device is disposed on the inner liner and the removable cover is removably attached to the inner liner. Preferably, the water leakage holes 243 are formed through the inner liner, and the detachable cover covers the water leakage holes 243 when attached to the inner liner. Thus, when the amount of water flowing out through the water leakage hole 243 is small, it is accumulated on the detachable cover and does not flow into the inner pot. The water can be cleaned up by removing the removable cover. Thus, the inner pot can be prevented from being polluted by water. Of course, if the amount of water is large, it will eventually flow into the inner pot through the removable cover.

In addition, an insulation board 13 is usually disposed below the heating device to cover the heating device, so as to perform the functions of heat preservation and insulation. The water leakage hole 243 penetrates the heat insulation plate 13. Preferably, a third packing 244 is provided between the insulation plate 13 and the bottom wall of the heating pan 241a to surround the water leakage hole 243. This makes it possible to move the water only to a predetermined safe position, avoiding the water entering between the heating device and the insulation panel 13.

Although only one sealing structure or venting structure is shown in the above embodiments, it is understood that the sealing structures or venting structures may be integrated in the same embodiment to avoid failure of one of the structures.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. It will be appreciated by those skilled in the art that many more modifications and variations are possible in light of the above teaching and are intended to be included within the scope of the invention.

Claims

1. A cooking appliance, characterized in that it comprises:

the cooker comprises a cooker body (40), wherein an inner pot (41) is arranged in the cooker body (40);

the cover body (10), the cover body (10) can be arranged on the cooker body (40) in an opening and closing way, when the cover body (10) covers the cooker body (40), a cooking space is formed between the cover body (10) and the inner pot (41); and

a steam generating device (20), the steam generating device (20) being disposed in the cover (10) and being used for generating steam for assisting cooking, the steam generating device (20) comprising a water container (23) and a receiving cavity (27), the water container (23) being used for receiving water to be heated to generate steam, the water container (23) being removably disposed in the receiving cavity (27) and being capable of communicating with the cooking space through a steam passage to introduce the steam into the cooking space;

wherein the receiving chamber (27) is provided with a sealing and/or a draining structure to avoid that water entering the receiving chamber (27) flows into the cover body (10) to contact with electrical components.

2. The cooking appliance according to claim 1, wherein the steam generating device (20) further comprises:

a heating device (24), wherein the heating device (24) is arranged below the water container (23) to heat the water container (23);

a bracket (29), wherein the bracket (29) is arranged at the opening of the water container (23) and surrounds the water container (23); and

a support member (28), the support member (28) being supported between the heating device (24) and the bracket (29) in the up-down direction and surrounding the water container (23);

wherein the heating device (24), the holder (29) and the support (28) together enclose the receiving space (27).

3. Cooking appliance according to claim 2, characterized in that said sealing structure comprises a first sealing ring (301) arranged between said heating device (24) and said support (28) and/or a second sealing ring (302) arranged between said support (28) and said bracket (29).

4. The cooking appliance according to claim 2 or 3, wherein the supporter is made of a flexible material and is provided to be pressed in an up-down direction, and the sealing structure includes the supporter.

5. The cooking appliance according to claim 4, wherein one of the end surfaces of the bracket (29) and the support member is provided with a groove (292), the other end surface is provided with a rib (291), and the bracket (29) and the support member are connected by the way of inserting the groove (292) and the rib (291).

6. Cooking appliance according to claim 4, characterized in that the end face of the support that meets the heating device (24) is provided with a recessed deformable portion (293).

7. The cooking appliance according to claim 2, wherein a through water leakage hole (243) is provided at a position of the heating device below the water container, and the drain structure comprises the water leakage hole (243).

8. The cooking appliance according to claim 7, wherein a heat insulation plate (13) is disposed at a position of the cover body below the heating device, the water leakage hole penetrates through the heat insulation plate (13), and a third sealing ring (244) surrounding the water leakage hole (243) is disposed between the heating device and the heat insulation plate (13).

9. The cooking appliance according to claim 8, wherein the cover body comprises an inner liner and a detachable cover detachably connected to the inner liner, the steam generating device being provided in the inner liner, the detachable cover covering the water leakage hole (243) in a state where the detachable cover is connected to the inner liner.

10. The cooking appliance according to claim 1, wherein a first steam channel (11) is provided in the cover (10), the water container (23) being communicable with the cooking space through the first steam channel (11) to introduce the steam into the cooking space; and/or a micro-pressure air outlet channel (12) is arranged in the cover body (10), and the cooking space can be communicated with the outside through the micro-pressure air outlet channel (12);

wherein the first vapor channel (11) and/or the micro-pressure gas outlet channel (12) are arranged adjacent to the accommodating cavity (27), and the first vapor channel (11) and/or the micro-pressure gas outlet channel (12) are lower than the opening of the accommodating cavity (27).