CN215077546U

CN215077546U - Beverage heating device

Info

Publication number: CN215077546U
Application number: CN202121266037.0U
Authority: CN
Inventors: 黄小承; 李建; 王国栋
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-12-10
Anticipated expiration: 2031-06-07

Abstract

The utility model relates to a drink heating device, wherein, drink heating device includes the casing, and heating element, fan assembly and isolation component are installed to the casing, and isolation component is located between drink heating device and the fan assembly, and has predetermined clearance between isolation component and the drink heating device. The isolation component is provided with a first channel, one end of the first channel faces the heating assembly, the other end of the first channel faces the fan assembly, and air with lower temperature can be blown to the heating assembly through the fan assembly or air with higher temperature of accessories of the heating assembly can be sucked out. Through such design can effectively promote drink heating device's radiating efficiency, reduce the possibility of occurence of failure such as scald, promote the security.

Description

Beverage heating device

Technical Field

The application relates to the technical field of liquid heating appliances, in particular to a beverage heating device.

Background

With the development of the technology, liquid heating appliances such as electric kettles and health preserving kettles have become common liquid heating containers for people, however, after the liquid heating containers are used, the temperature of the beverage heating device of the liquid heating containers is high, and the liquid heating devices are not convenient to store and carry.

SUMMERY OF THE UTILITY MODEL

The application provides a drink heating device for promote drink heating device's radiating efficiency.

The embodiment of the application provides a drink heating device, drink heating device includes:

a housing;

the heating assembly is arranged on the upper part of the shell and is used for heating the container main body;

the fan assembly is arranged at the lower part of the shell;

an isolation member located between the fan assembly and the heating assembly;

wherein, a gap of 0.5 mm to 2.5 mm is arranged between one side of the isolation component facing the heating assembly and the heating assembly, the isolation component is provided with a first channel, one end of the first channel faces the fan assembly, the other end of the first channel faces the heating assembly, and the fan assembly is used for driving air to flow along the first channel.

Through setting up fan unit and being provided with first passageway at isolation parts, the lower air of fan unit with the temperature of can being convenient for blows to heating element, or, take away near heating element the higher air of near heating element temperature near, because have predetermined clearance between isolation parts and the heating element, consequently, the air can flow between isolation parts and heating element, thereby promote beverage heating device's radiating efficiency, be favorable to reducing beverage heating device's temperature, reduce the possibility promotion security of occurence of accidents such as scald. The isolation component is used for separating the heating assembly from other structures of the beverage heating device so as to reduce the structure that the heat emitted by the heating assembly influences other structures.

In a possible embodiment, the side of the isolation component facing the heating assembly is provided with a plurality of protrusions, and the protrusions are arranged at intervals.

Through setting up towards the bellied bellying of heating element, when the air flows between isolation parts and heating element, the air can collide and change flow direction with the bellying to be favorable to the air evenly to flow between isolation parts and heating element, thereby make the abundant heat transfer of air and heating element.

In a possible embodiment, the projections are radially distributed in a direction away from a central position of the spacer member.

Through being radial distribution with the bellying to make the bellying can distribute comparatively evenly at the spacer member, be favorable to the air to become to evenly flow backward between heater block and spacer member, so that air and heating element fully contact and carry out the heat transfer, improve the radiating efficiency.

In a possible embodiment, the beverage heating device further comprises a support portion connected with the housing, and the isolation member is mounted to the support portion.

Through setting up the supporting part, can be convenient for install isolation component.

In a possible embodiment, the support portion is provided with a first limiting portion, and the first limiting portion is arranged along the circumferential direction of the isolation component and is used for limiting the isolation component.

The supporting part is provided with a first limiting part, the first limiting part is arranged along the circumferential direction of the isolation part, the isolation part is limited through the first limiting part, the installation precision of the isolation part can be improved, the possibility that the isolation part generates displacement can be reduced in the using process, and the position precision of the isolation part can be improved.

In a possible embodiment, the support portion is provided with a second channel, the second channel is arranged along the circumferential direction of the isolation component and along the radial direction of the beverage heating device, the second channel is located between the housing and the isolation component and penetrates through the support portion along the thickness direction of the beverage heating device, and the second channel is communicated with the first channel.

Through set up the second passageway that extends along circumference at the supporting part, the air can flow between casing and spacer, second passageway and first passageway intercommunication, and cold air can flow into between heating element and the spacer along the second passageway, or, hot-air can leave between heating element and the spacer along the second passageway, can be favorable to the air to flow in beverage heating device is inside, promotes the radiating efficiency.

In a possible embodiment, the beverage heating device further includes a fan accommodating part, the fan accommodating part is installed on the bottom wall of the housing and encloses with the bottom wall of the housing to form a first cavity, the fan assembly is located in the first cavity, and the first cavity is communicated with the first channel.

The fan accommodating piece communicated with the first channel through the shell can be favorable for guiding the air flowing, the air is convenient to contact with the heating assembly, the heat dissipation efficiency is improved, the sealing effect is achieved, and the possibility that the air flows along other directions is reduced.

In a possible embodiment, the bottom wall of the housing is provided with a second limiting portion for limiting the fan accommodating part, and the second limiting portion protrudes along the height direction of the beverage heating device.

The fan containing piece can be limited by arranging the second limiting part on the shell, and the installation precision of the fan containing piece is improved.

In a possible embodiment, the supporting portion of the beverage heating device includes an extending section, the extending section extends toward a direction close to the fan assembly, and at least a portion of the extending section can extend into the first cavity and abut against an inner side wall of the fan accommodating member.

Through the extension section that sets up the inside wall butt that can stretch into first cavity and with the fan holding piece, can promote the leakproofness of fan holding piece and isolation component hookup location, reduce the possibility that takes place the gas leakage at hookup location.

In a possible embodiment, a second cavity is formed between the casing and the supporting part and between the casing and the fan accommodating part;

and a third channel is formed in the bottom wall of the shell and is communicated with the second cavity.

Through set up the third passageway at the diapire of casing, can be favorable to drink heating device's inside and outside intercommunication, the air of being convenient for flows, promotes the radiating efficiency.

The application provides a drink heating device, wherein, drink heating device includes the casing, and heating element, fan assembly and isolation component are installed to the casing, and isolation component is located between drink heating device and the fan assembly, and has the clearance between isolation component and the drink heating device. The isolation component is provided with a first channel, one end of the first channel faces the heating assembly, the other end of the first channel faces the fan assembly, and air with lower temperature can be blown to the heating assembly through the fan assembly or air with higher temperature of accessories of the heating assembly can be sucked out. Through such design can effectively promote drink heating device's radiating efficiency, reduce the possibility of occurence of failure such as scald, promote the security.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a schematic structural diagram of a liquid heating container provided in an embodiment of the present application;

fig. 2 is a cross-sectional view of a beverage heating device provided in an embodiment of the present application;

fig. 3 is a schematic view of an internal structure of a beverage heating device provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a first embodiment of a beverage heating device provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a beverage heating device according to a second embodiment of the present application.

Reference numerals:

a-a beverage heating device;

1-a shell;

11-a second cavity;

12-a third channel;

13-a second limiting part;

2-a heating assembly;

3-a fan assembly;

4-an isolation component;

41-a first channel;

42-a boss;

5-a support part;

51-a first stop;

52-a second channel;

53-extension;

6-a fan housing;

61-a first cavity;

7-the container body.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

As shown in fig. 1, the present application provides a beverage heating device a and a liquid heating container, the liquid heating container includes a beverage heating device a and a container body 7, the container body 7 is used for containing liquid, the beverage heating device a is used for heating the container body 7 of the liquid heating container such as a beverage cup, for example, the beverage heating device a can heat the liquid contained in the container body 7. As shown in fig. 2, the beverage heating device a includes a housing 1, a heating assembly 2, a fan assembly 3 and an isolation member 4, the heating assembly 2, the fan assembly 3 and the isolation member 4 are mounted on the housing 1, specifically, along a height direction of the beverage heating device a, the heating assembly 2 is mounted on an upper portion of the housing 1, the fan assembly 3 is mounted on a lower portion of the housing 1, the isolation member 4 is located between the fan assembly 3 and the heating assembly 2, a preset gap is provided between the isolation member 4 and the heating assembly 2, specifically, a gap of 0.5 mm to 2.5 mm is provided between the isolation member 4 and the heating assembly 2, so that air can flow between the isolation member 4 and the heating assembly 2, thereby facilitating heat exchange between the air and the heating assembly 2. The isolation component 4 is provided with a first channel 41, one end of the first channel 41 faces the fan assembly 3, and the other end faces the heating assembly 2, and the fan assembly 3 can drive air to flow along the first channel 41, specifically, the fan assembly 3 can make air with lower temperature flow to the vicinity of the heating assembly 2 along the first channel 41, or make air with higher temperature near the heating assembly 2 flow to be far away from the heating assembly 2 along the first channel 41, so as to reduce the temperature of the heating assembly 2. The isolation component 4 is used to separate the heating assembly 2 from other components such as the fan assembly 3, so as to reduce the possibility that the temperature of the heating assembly 2 is too high to cause other heat damages to the beverage heating device a.

The separating element 4 is used to separate the heating element 2 from other components, such as a power supply assembly, etc., and the separating element 4 can serve as an insulator to reduce the possibility that the heat generated by the heating element 2 will affect other components of the heating device a. This application embodiment is through setting up fan unit 3 and being provided with first passageway 41 at isolation component 4, can be convenient for fan unit 3 blows the lower air of temperature to heating element 2 or takes away the higher air of heating element 2 nearby temperature near heating element 2, because have predetermined clearance between isolation component 4 and the heating element 2, consequently, the air can flow between isolation component 4 and heating element 2, thereby promote beverage heating device A's radiating efficiency, reduce the possibility of occurence of accidents such as scald, promote beverage heating device A's security. Simultaneously, the promotion of radiating efficiency is favorable to drink heating device A's temperature to reduce fast to the user in time accomodates or carries after using.

In one possible embodiment, as shown in fig. 2, the side of the isolation member 4 facing the heating assembly 2 is provided with a protrusion 42, the protrusion 42 protrudes toward the side close to the heating assembly 2, and the protrusions 42 are spaced apart.

The arrangement of the protruding portion 42 can guide the flowing direction of the air, for example, when the fan assembly 3 blows the air with lower temperature to the heating assembly 2, the air flows to the vicinity of the heating assembly 2 along the first channel 41 and flows between the heating assembly 2 and the isolation component 4, when the air meets the protruding portion 42, the flowing direction can be changed, the air can flow more uniformly between the heating assembly 2 and the isolation component 4 through the design, so that the temperature of the heating assembly 2 is favorably reduced, and the possibility of uneven heat dissipation of the heating assembly 2 is reduced.

Specifically, each protruding portion 42 may be radially distributed along a direction away from the central position of the isolation component 4, such a design can facilitate even flow of air between the isolation component 4 and the heating assembly 2, thereby achieving even heat dissipation of the heating assembly 2 and reducing the possibility of occurrence of a situation where the local temperature of the heating assembly 2 is high.

As shown in fig. 2, in one possible embodiment, the boss 42 may abut the heating assembly 2.

Through the design, the possibility that air directly flows from the position between the convex part 42 and the heating component 2 without changing the direction of the convex part 42 can be reduced, so that the air can uniformly flow between the heating component 2 and the isolation component 4, and the heat dissipation efficiency is improved.

As shown in fig. 2, in one possible embodiment, the beverage heating device a is further provided with a support portion 5, the support portion 5 is connected with the housing 1, and the isolation member 4 is mounted to the housing 1 through the support portion 5.

By adopting the design, the isolation component 4 can be conveniently installed, and the possibility that the isolation component 4 is contacted with components such as the fan assembly 3 and the like to influence the normal operation of the heating assembly 2 can be reduced.

As shown in fig. 2, in a possible embodiment, the supporting portion 5 is provided with a first limiting portion 51, and the first limiting portion 51 may be disposed along the circumferential direction of the isolation component 4, so as to limit the isolation component 4 and improve the installation accuracy of the isolation component 4, and meanwhile, in the using process, the possibility of displacement of the isolation component 4 can be reduced, the position accuracy of the isolation component 4 is improved, and the isolation effect is improved.

As shown in fig. 3, in one possible embodiment, the support portion 5 may be provided with a second channel 52, and the second channel 52 may be disposed along the circumferential direction of the isolation component 4, between the isolation component 4 and the housing 1, and penetrates through the support portion 5 along the thickness direction of the beverage heating device a, specifically, the housing 1 may include a second cavity 11, along the radial direction of the beverage heating device a, and the second channel 52 is disposed between the isolation component 4 and the housing 1.

By such a design, the air flow can be facilitated, for example, when the fan assembly 3 is used for blowing air with a lower temperature into the heating assembly 2, the air can flow to a position far away from the heating assembly 2 along the second channel 52 after heat exchange with the heating assembly 2, thereby carrying heat away from the heating assembly 2; when the fan assembly 3 is used to suck the air with higher temperature near the heating assembly 2, the air with lower temperature can flow along the second channel 52 to between the heating assembly 2 and the isolation member 4, and after heat exchange with the heating assembly 2, the air is sucked out of the first channel 41 by the fan assembly 3.

As shown in fig. 2, in a possible embodiment, the beverage heating apparatus a further includes a fan housing 6, the fan housing 6 is mounted to the housing 1, the fan housing 6 may include a first cavity 61, the fan assembly 3 is mounted to the first cavity 61, and the first cavity 61 is communicated with the first channel 41.

The location of the fan assembly 3 can be effectively sealed by the provision of the fan housing 6, thereby facilitating the blowing of air by the fan assembly 3 towards the vicinity of the heating assembly 2 or the sucking of air out of the vicinity of the heating assembly 2. Meanwhile, the fan accommodating piece 6 can also play a role in shock resistance, and reduces the shock generated by the fan assembly 3 in the working process, so that the working quality of the beverage heating device A is improved, the working stability of the beverage heating device A is improved, and the possibility of shaking of the liquid heating container is reduced.

In one possible embodiment, as shown in fig. 2, the housing 1 is provided with a second limiting portion 13, the housing 1 has a second cavity 11, and the fan housing 6 and other components can be located in the second cavity 11. The second limiting portion 13 is disposed on the bottom wall of the housing 1, and may be protruded toward the inner side of the second cavity 11. The second limiting portion 13 is used for limiting the fan accommodating part 6, the fan accommodating part 6 and the bottom wall of the housing 1 can enclose a mounting area, and the fan assembly 3 is mounted in the mounting area.

By means of the design, the fan assembly 3 can be installed in a relatively closed space, and the installation space is communicated with the first channel 41, so that the flow of air is guided, and the possibility that the air does not exchange heat with the heating assembly 2 during flowing is reduced.

As shown in fig. 2, in a possible embodiment, the supporting portion 5 is provided with an extending section 53, the extending section 53 extends toward a direction close to the fan assembly 3, and at least a part of the extending section 53 can extend into the first cavity 61 and abut against an inner side wall of the fan accommodating member 6.

By such a design, the stability of the connection between the support part 5 and the fan accommodating part 6 can be improved, which is beneficial for air to flow to the heating assembly 2 along the first channel 41 or to move away from the heating assembly 2 along the first channel 41. At least part of the extension section 53 extends into the first cavity 61 and abuts against the inner side wall of the fan accommodating piece 6, so that the sealing performance of the connection position of the extension section and the first cavity can be improved, and the possibility of air leakage is reduced.

In a possible embodiment, the cross-sectional area of the fan housing 6 decreases gradually in a direction approaching the first passage 41.

Can be convenient for gather wind through such design, be favorable to increaseing wind speed and wind-force to be favorable to promoting the velocity of flow of cold air, and then can promote the velocity of flow between heating element 2 and the separator 4, be favorable to promoting the radiating efficiency.

In particular, the support 5 may be interference fitted with the fan housing 6. Due to the design, the sealing performance can be improved, the connection stability of the supporting part 5 and the fan accommodating part 6 can be improved, and the practical use requirement is met.

As shown in fig. 2, in one possible embodiment, the housing 1 can enclose the support portion 5 and the fan receiving member 6 into a second cavity 11, the fan receiving member 6 encloses a mounting area with the bottom wall of the second cavity 11, the fan assembly 3 is mounted in the mounting area, and the isolation member 4 is located on a side of the heating assembly 2 facing the bottom wall of the second cavity 11. The bottom wall of the shell 1 is provided with a third channel 12, and the third channel 12 penetrates through the bottom wall of the second cavity 11 along the thickness direction of the beverage heating device A, so that the inside and the outside of the second cavity 11 are communicated, and the air flow is facilitated.

Specifically, as shown in fig. 4, in a possible embodiment, the fan assembly 3 is configured to blow air with a relatively low temperature toward the heating assembly 2, the fan assembly 3 drives the air to flow by rotating the fan blades, so that the outside air enters the first cavity 61 of the fan accommodating part 6 through the third channel 12 of the bottom wall of the housing 1, and flows toward the heating assembly 2 along the first channel 41 under the action of the fan assembly 3, and when the air flows to the vicinity of the heating assembly 2, the air can exchange heat with the heating assembly 2 and flows along the gap between the heating assembly 2 and the isolating part 4, and the protrusion 42 of the isolating part 4 is configured to guide the air flow, so that the air can exchange heat with the heating assembly 2 sufficiently. The air after heat exchange flows to the periphery of the heating assembly 2 along the gap between the heating assembly 2 and the isolation part 4, flows to the second channel 52 along the gap between the isolation part 4 and the side wall of the shell 1, flows to the third channel 12 on the bottom wall of the second cavity 11 along the second channel 52, and flows to the outer side of the beverage heating device a along the third channel 12.

In one possible embodiment, as shown in fig. 5, the fan assembly 3 is used to draw out air having a higher temperature near the heating assembly 2. Under the action of the fan assembly 3, the air in the first cavity 61 flows to the outside of the beverage heating device a along the third channel 12, so that the air pressure in the first cavity 61 is reduced, the air flows to the first cavity 61, that is, the air near the heating assembly 2 can flow to the first cavity 61 along the first channel 41 and be discharged out of the beverage heating device a under the action of the fan assembly 3, and because the internal air pressure in the beverage heating device a is reduced, the external air can flow into the second channel 52 along the third channel 12 in the direction of the arrow in the figure and enter between the isolation component 4 and the heating assembly 2, and after exchanging heat with the heating assembly 2, the external air flows into the first cavity 61 along the first channel 41 and is discharged out of the beverage heating device a under the action of the fan assembly 3.

The scheme that blows the lower air of temperature to heating element 2 is preferentially adopted in this application embodiment, compares in the scheme of taking the higher air of temperature out, blows the lower air of temperature to fan unit 3 in the scheme of heating element 2 and the possibility of the higher air contact of temperature is lower, and high temperature resistant requirement to fan unit 3 is also lower relatively, is favorable to saving the cost, accords with actual user demand more.

Based on the beverage heating device a that each above embodiment relates to, this application embodiment still provides a liquid heating container, and liquid heating container includes container main part 7 and beverage heating device a, and container main part 7 is used for holding liquid, and beverage heating device a is used for heating the liquid that container main part 7 held. The beverage heating device a may be the beverage heating device a related to any of the above embodiments, and since the beverage heating device a has the above technical effects, the liquid heating container including the beverage heating device a also has corresponding technical effects, which are not described herein again.

The embodiment of the application provides a beverage heating device A, wherein, beverage heating device A includes casing 1, and heating element 2, fan assembly 3 and isolation component 4 are installed to casing 1, and isolation component 4 is located between beverage heating device A and the fan assembly 3, and has predetermined clearance between isolation component 4 and the beverage heating device A. The partition member 4 is provided with a first channel 41, one end of the first channel 41 faces the heating assembly 2, and the other end faces the fan assembly 3, so that air with lower temperature can be blown to the heating assembly 2 or air with higher temperature near the heating assembly 2 can be sucked out by the fan assembly 3. Through such design can effectively promote drink heating device A's radiating efficiency, reduce the possibility of occurence of failure such as scald, promote the security.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A beverage heating device, characterized in that said beverage heating device (A) comprises:

a housing (1);

the heating assembly (2), the said heating assembly (2) is mounted to the upper portion of the said body (1), is used for heating the container body (7);

the fan assembly (3), the said fan assembly (3) is mounted to the inferior part of the said body (1);

a spacer member (4), the spacer member (4) being located between the fan assembly (3) and the heating assembly (2);

wherein, a gap of 0.5 mm to 2.5 mm is arranged between one side of the isolation component (4) facing the heating assembly (2) and the heating assembly (2), and the isolation component (4) is provided with a first channel (41), one end of the first channel (41) faces the fan assembly (3), and the other end faces the heating assembly (2), and the fan assembly (3) is used for driving air to flow along the first channel (41).

2. A beverage heating device according to claim 1, wherein the side of the partition member (4) facing the heating assembly (2) is provided with a plurality of protrusions (42), each protrusion (42) being arranged at intervals.

3. A beverage heating device according to claim 2, wherein the protrusions (42) are radially distributed in a direction away from the central position of the partition (4).

4. The beverage heating device according to claim 1, wherein the beverage heating device (a) further comprises a support (5), the support (5) being connected with the housing (1), the isolation member (4) being mounted to the support (5).

5. A beverage heating device according to claim 4, wherein the support portion (5) is provided with a first limiting portion (51), the first limiting portion (51) being provided along a circumferential direction of the isolation member (4) for limiting the isolation member (4).

6. The beverage heating device according to claim 4, characterized in that the support (5) is provided with a second channel (52), the second channel (52) is arranged along the circumference of the partition (4), along the radial direction of the beverage heating device (A), the second channel (52) is located between the housing (1) and the partition (4) and penetrates through the support (5) along the thickness direction of the beverage heating device (A), and the second channel (52) is communicated with the first channel (41).

7. The beverage heating device according to any one of claims 1 to 6, wherein the beverage heating device (A) further comprises a fan receiver (6), the fan receiver (6) is mounted on the bottom wall of the housing (1) and encloses a first cavity (61) with the bottom wall of the housing (1), the fan assembly (3) is located in the first cavity (61), and the first cavity (61) is communicated with the first channel (41).

8. The beverage heating device according to claim 7, wherein the bottom wall of the housing (1) is provided with a second limiting portion (13) for limiting the fan containing part (6), and the second limiting portion (13) protrudes along the height direction of the beverage heating device (A).

9. The beverage heating device according to claim 7, wherein the support portion (5) of the beverage heating device (A) comprises an extension section (53), the extension section (53) extends towards a direction close to the fan assembly (3), and at least part of the extension section (53) can extend into the first cavity (61) and abut against an inner side wall of the fan housing (6).

10. The beverage heating device according to claim 9, wherein a second cavity (11) is formed between the housing (1) and the support (5) and the fan receptacle (6);

a third channel (12) is formed in the bottom wall of the shell (1), and the third channel (12) is communicated with the second cavity (11).