CN215650645U

CN215650645U - Air heating assembly and cooking appliance comprising same

Info

Publication number: CN215650645U
Application number: CN202121349400.5U
Authority: CN
Inventors: 吕挺; 陈锡雁; 梁郁庆; 杨伟辉; 陈波
Original assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Current assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-28
Anticipated expiration: 2031-06-17

Abstract

The present invention relates to an air heating assembly and a cooking appliance comprising the same. The air heating component comprises a motor (1), a heat shield (4), a hot air fan (10) and a heating piece (9) arranged below the hot air fan (10). The heat shield (4) is provided with a motor shaft hole. A motor shaft (1a) of the motor (1) penetrates through a motor shaft hole to be connected with the hot air fan (10). A sealing bearing (6) is arranged on the motor shaft (1 a). And a sealing element (7) is arranged around the motor shaft hole above the heat shield (4). The seal bearing (6) is superposed on the seal (7) such that a gap between the seal bearing (6) and the heat shield (4) is closed by the seal (7). According to the air heating assembly, the sealing performance of the motor shaft hole is improved by sealing the gap between the sealing bearing and the heat shield by using the sealing piece.

Description

Air heating assembly and cooking appliance comprising same

Technical Field

The utility model relates to the field of kitchen appliances, in particular to an air heating assembly and a cooking appliance comprising the same.

Background

With the continuous improvement of living standard, the diversified needs of consumers for food cooking modes are higher and higher. An air fryer is cooking equipment for frying food by utilizing hot air circulation and grease of the food, and the product is favored by consumers due to the green and healthy cooking concept. In recent years, multifunctional cooking appliances integrating an air-frying function, such as an electric cooker, an electric oven, a microwave oven, and a pressure cooker, having an air-frying function, have also appeared on the market. The appearance of the multifunctional cooking appliances enables the limited kitchen space of users to be efficiently utilized, and the diversified requirements of the users on food cooking modes are met.

A core component for performing the air-frying function of the cooking appliance is an air heating assembly capable of generating flowing hot air. The air heating assembly generally includes a motor, a heat shield, a hot air fan, and a heat generating member. The motor is arranged above the heat shield. The motor shaft passes through a motor shaft hole arranged on the heat shield and is connected with a hot air fan below the heat shield. The hot air fan can rotate under the drive of the motor to drive air to flow downwards. When the air flows through the heating part positioned below the hot air fan, the air is heated to rise temperature, and a hot air flow is formed for air-frying the food in the cooking cavity.

In current cooking appliance who has the air-fry function, because there is the gap between the motor shaft that passes the motor shaft hole and the motor shaft that sets up on the heat shield, the oil smoke or the steam that produce can flow to near circuit element of motor and motor through this gap during culinary art food to influence cooking appliance's life.

The problem of steam leakage is more pronounced, especially for steam ovens. Because the steam oven can actively generate steam in the cooking process, a large amount of steam filled in the cooking cavity flows to the motor through the gap of the motor shaft hole more easily, and the service lives of the motor and other circuit elements are influenced.

Therefore, there is a need to provide a solution that can improve the sealing of the air heating assembly.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an air heating assembly and a cooking appliance including the same, so as to solve the above technical problems.

The technical scheme of the utility model is as follows:

the utility model provides an air heating subassembly for cooking device, air heating subassembly includes the motor, separates heat exchanger, hot-blast fan and sets up the piece that generates heat in the hot-blast fan below, is equipped with the motor shaft hole on the heat exchanger, and the motor shaft of motor passes the motor shaft hole and is connected with hot-blast fan, installs sealed bearing on the motor shaft, separates the heat exchanger top and is equipped with the sealing member around the motor shaft hole, and sealed bearing superposes on the sealing member for sealed bearing and the clearance that separates between the heat exchanger are sealed by the sealing member.

According to the preferred embodiment of the utility model, the sealing element is a silica gel sleeve, and the silica gel sleeve is sleeved below the sealing bearing.

According to a preferred embodiment of the utility model, a first bushing is movably mounted on the motor shaft, the first bushing being at least partially located in the motor shaft bore.

According to a preferred embodiment of the present invention, the lower end of the motor shaft is fixedly connected to the hot air fan, the upper end of the first sleeve abuts against the seal bearing, and the lower end of the first sleeve abuts against the hot air fan.

According to a preferred embodiment of the present invention, the heat shield is provided with a heat shield groove depressed toward the direction of the hot air fan, and the sealing member and the motor shaft hole are disposed in the heat shield groove.

According to a preferred embodiment of the present invention, the air heating assembly further comprises a cool air fan fixedly mounted on the motor shaft and located above the sealing bearing.

According to the preferred embodiment of the utility model, a second shaft sleeve is movably arranged on the motor shaft, the upper end part of the second shaft sleeve abuts against the cold air fan, and the lower end part of the second shaft sleeve abuts against the sealing bearing.

According to the preferred embodiment of the utility model, a motor shaft clamping groove is arranged on the motor shaft, and the lower edge of the mounting hole of the cold air fan is embedded into the motor shaft clamping groove.

According to a preferred embodiment of the present invention, the air heating assembly further includes a motor cover, the motor is fixed above the motor cover, and the cool air fan is disposed between the motor cover and the heat shield.

A cooking appliance comprises the air heating assembly.

In the air heating assembly, the sealing element is used for sealing the gap between the sealing bearing and the heat shield, so that the sealing performance of the motor shaft hole is improved, and oil smoke or steam generated in the cooking process is prevented from flowing to the motor and other circuit elements above the heat shield through the motor shaft hole. Further, the motor shaft is further provided with a first shaft sleeve and a second shaft sleeve, so that the sealing bearing is fixed at a position between the first shaft sleeve and the second shaft sleeve, and the sealing performance of the sealing bearing and the sealing element is ensured while the accurate positioning of the sealing bearing is ensured.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

FIG. 1 is a schematic view of an air heating assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the air heating assembly shown in FIG. 1;

FIG. 3 is an exploded view of an air heating assembly according to an embodiment of the present invention;

fig. 4 is an installation view of an air heating assembly according to an embodiment of the present invention.

Description of reference numerals:

1-motor, 1 a-motor shaft, 1 b-motor shaft slot; 2-a motor bracket; 3-motor cover; 4-heat shield, 4 a-heat shield groove; 5-a second shaft sleeve; 6-sealing the bearing; 7-a seal; 8-a first sleeve; 9-a heat generating member; 10-hot air fan; 11-cold air fan.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the utility model, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

FIG. 1 is a schematic view of an air heating assembly according to an embodiment of the present invention. The air heating assembly according to the embodiment of the utility model is used for being installed in a cooking appliance, and the hot air is generated to heat the food in the cooking appliance (namely, the air-frying function is realized). As shown in fig. 1, the air heating assembly according to the present embodiment includes a motor 1, a heat shield 4, a hot air fan 10, and a heat generating member 9 disposed below the hot air fan 10. The heat shield 4 is provided with a motor shaft hole. A motor shaft 1a of the motor 1 is connected to the hot air fan 10 through a motor shaft hole such that the hot air fan 10 can be rotated by the motor 1. The motor shaft 1a is provided with a seal bearing 6. A sealing element 7 is arranged above the heat shield 4 and around the motor shaft hole. The seal bearing 6 is superposed on the seal 7 such that the gap between the seal bearing 6 and the heat shield 4 is closed by the seal 7. The sealing structure formed between the seal bearing 6 and the seal 7 is shown in fig. 2. Through the sealing structure formed between the sealing bearing 6 and the sealing piece 7, oil smoke or steam flowing upwards from the motor shaft hole is blocked below the sealing structure and cannot enter the space above the heat shield 4, so that the motor 1 and other circuit elements above the heat shield 4 are prevented from being influenced by the oil smoke or the steam, and the service lives of the air heating assembly and the cooking appliance are prolonged.

In this embodiment, the sealing member 7 may be a silicone sleeve made of silicone rubber. The silica gel cover can be established below the sealed bearing 6 to improve the leakproofness of sealing member 7. A boss may be provided in the silicone sleeve for supporting the sealed bearing 6. The heat shield 4 may be provided with a heat shield groove 4a depressed toward the hot blast fan 10. Both the seal 7 and the motor shaft hole can be provided in the heat shield groove 4 a. The bottom of the seal 7 may be movably mounted on the bottom upper surface of the heat shield groove 4 a.

In the present embodiment, the lower end of the motor shaft 1a is fixedly connected to the hot air fan 10. The motor shaft 1a is movably mounted with a first bushing 8. The first bushing 8 is at least partially located in the motor shaft bore. The upper end of the first sleeve 8 abuts against the seal bearing 6, and the lower end of the first sleeve 8 abuts against the hot air fan 10. The arrangement of the first bushing 8 may define the distance of the sealed bearing 6 with respect to the hot air fan 10.

In this embodiment, the air heating assembly may further include a cool air fan 11. The cold-air fan 11 may be fixedly installed on the motor shaft 1a and located above the sealing bearing 6. The air heating assembly may also comprise a motor housing 3. The electric motor 1 can be fixed above the motor housing 3, for example, by means of a motor bracket 2. The cool air fan 11 may be disposed between the motor cover 3 and the heat shield 4. Therefore, a cool air duct is formed between the motor cover 3 and the heat shield 4. The cold air fan 11 rotates by the rotation of the motor 1, thereby driving the air in the cold air duct to flow, and promoting the heat dissipation of the components in the cooking appliance. A motor shaft clamping groove 1b can be arranged on the motor shaft 1 a. The lower edge of the mounting hole of the cool air fan 11 may be inserted into the motor shaft slot 1b, thereby defining the position of the cool air fan 11. A second shaft sleeve 5 is movably mounted on the motor shaft 1 a. The upper end of the second sleeve 5 abuts against the cold air fan 11, and the lower end of the second sleeve 5 abuts against the seal bearing 6. The arrangement of the second bushing 5 may define the distance of the sealing bearing 6 with respect to the cold air fan 11. The first shaft sleeve 5 and the second shaft sleeve 8 respectively limit the position of the sealing bearing 6 on the motor shaft 1a from the lower part and the upper part, so that the sealing bearing 6 is tightly connected with the sealing gasket 7, and the sealing performance of the sealing structure is ensured.

Fig. 3 is an exploded view of the air heating assembly shown in fig. 1. In fig. 3, the second sleeve 5, the seal bearing 6, and the first sleeve 8 are mounted on the motor shaft 1a of the motor 1 in this order from top to bottom. The seal 7 is mounted on the upper surface of the heat shield 4 (specifically, on the bottom upper surface of the heat shield groove 4a) around the motor shaft hole. The first 8 and second 5 bushings define the position of the sealed bearing 6 from below and from above, respectively, so that the sealed bearing 6 remains superposed over the seal 7, forming a sealed structure.

Fig. 4 is an installation view of an air heating assembly according to an embodiment of the present invention. As shown in fig. 4, the air heating assembly is installed above a cooking cavity of the cooking appliance for generating hot air flowing into the cooking cavity so as to air-heat (air-fry) food. The cooking appliance may be an air fryer or any multi-functional cooking appliance having an air fryer function, such as an oven (particularly a steam oven) having an air fryer function, a microwave oven, a rice cooker, a pressure cooker, etc. According to the air heating assembly provided by the embodiment of the utility model, the sealing structure can prevent oil smoke or steam generated in the cooking cavity of the cooking appliance from entering the space above the heat shield through the motor shaft hole on the heat shield, so that the motor or other circuit elements in the space above the heat shield are prevented from being influenced by the oil smoke or the steam.

So far, some specific embodiments of the present invention have been described in detail by way of examples, but it should be understood by those skilled in the art that the above examples are only for illustrative purposes and are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. The utility model provides an air heating subassembly for cooking device, a serial communication port, air heating subassembly includes motor (1), separate heat exchanger (4), hot-blast fan (10) and set up at the piece (9) that generates heat of hot-blast fan (10) below, be equipped with the motor shaft hole on separating heat exchanger (4), motor shaft (1a) of motor (1) passes the motor shaft hole and is connected with hot-blast fan (10), install sealed bearing (6) on motor shaft (1a), it is equipped with sealing member (7) around the motor shaft hole to separate heat exchanger (4) top, sealed bearing (6) superpose is on sealing member (7), make sealed bearing (6) and the clearance between separating heat exchanger (4) sealed by sealing member (7).

2. Air heating assembly according to claim 1, characterized in that the sealing element (7) is a silicone sleeve which is sleeved under the sealing bearing (6).

3. An air heating assembly according to claim 1, characterized in that the motor shaft (1a) has movably mounted thereon a first bushing (8), the first bushing (8) being at least partly located in the motor shaft bore.

4. An air heating assembly according to claim 3, characterized in that the lower end of the motor shaft (1a) is fixedly connected with the hot air fan (10), the upper end of the first bushing (8) abuts against the sealing bearing (6), and the lower end of the first bushing (8) abuts against the hot air fan (10).

5. The air heating assembly according to claim 1, wherein the heat shield (4) is provided with a heat shield groove (4a) recessed toward the hot air fan (10), and the sealing member (7) and the motor shaft hole are provided in the heat shield groove (4 a).

6. The air heating assembly according to claim 4, further comprising a cold air fan (11), the cold air fan (11) being fixedly mounted on the motor shaft (1a) and being located above the sealing bearing (6).

7. The air heating assembly according to claim 6, wherein the motor shaft (1a) is further movably mounted with a second bushing (5), an upper end of the second bushing (5) abuts against the cold air fan (11), and a lower end of the second bushing (5) abuts against the sealing bearing (6).

8. The air heating unit as claimed in claim 7, wherein the motor shaft (1a) is provided with a motor shaft engaging groove (1b), and a lower edge of the mounting hole of the cool air fan (11) is inserted into the motor shaft engaging groove (1 b).

9. The air heating assembly according to claim 6, further comprising a motor cover (3), wherein the motor (1) is fixed above the motor cover (3), and wherein the cool air fan (11) is arranged between the motor cover (3) and the heat shield (4).

10. Cooking appliance, characterized in that it comprises an air heating assembly according to any of the preceding claims.