CN215305149U

CN215305149U - Air heating assembly and cooking appliance comprising same

Info

Publication number: CN215305149U
Application number: CN202120870826.9U
Authority: CN
Inventors: 陈锡雁; 梁郁庆
Original assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Current assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-12-28
Anticipated expiration: 2031-04-26

Abstract

The utility model relates to an air heating assembly for a cooking appliance. The air heating component comprises a motor (11), a heat shield (15) and a hot air fan (17). A volute-shaped groove (150) is arranged on the heat shield (15). The end part of the volute-shaped groove (150) is provided with a hot air outlet (154). A motor shaft (110) of the motor (11) penetrates through the heat shield (15) to be connected with the hot air fan (17) and limits the hot air fan (17) in the volute-shaped groove (150), so that air is driven by the hot air fan (17) to be discharged from the hot air outlet (154). According to the air heating assembly, the heat insulation cover with the volute-shaped groove is utilized, so that hot air can be smoothly discharged from the hot air outlet along the hot air outlet channel, the noise generated in the hot air discharging process is reduced, and the user experience of the cooking appliance is improved.

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 development of electronic technology, more and more automatic kitchen appliances appear in the market so as to meet various requirements of people. Particularly in the field of cooking appliances, the electronic control system is integrated in the cooking appliances, so that the cooking appliances can automatically execute cooking programs, and the efficiency of cooking operation is greatly improved.

The principle of the air fryer is that high-temperature air heated by a heating element circulates in a cooking cavity through a hot air fan, and food materials in the cooking cavity are heated under the condition that edible oil is not added. Besides the air fryer, cooking appliances such as an electric cooker, an electric pressure cooker, an electric oven or a microwave oven with an air fryer function are also available on the market. The air fryer and the cooking appliance with the air fryer function can be used for making crisp, tasty, healthy and environment-friendly food under the oil-free condition. However, in order to perform the air fryer function, these cooking appliances are required to be equipped with an air heating assembly having a motor and a hot air fan. The air heating component can generate large noise during working, and adverse effect is brought to the user experience of the cooking appliance.

Accordingly, there is a need to reduce the noise generated by an air heating assembly used to implement an air fryer function in order to improve the user experience of a cooking appliance.

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:

an air heating component is used for an electric cooking appliance and comprises a motor, a heat shield and a hot air fan, wherein a volute groove is formed in the heat shield, a hot air outlet is formed in the end portion of the volute groove, a motor shaft of the motor penetrates through the heat shield to be connected with the hot air fan, the hot air fan is limited in the volute groove, and air is discharged from the hot air outlet under the driving of the hot air fan.

According to a preferred embodiment, the volute-shaped groove comprises a first section of arc-shaped side wall, and a second section of arc-shaped side wall and a third section of arc-shaped side wall which are respectively connected with two ends of the first section of arc-shaped side wall, wherein the curvature of the second section of arc-shaped side wall is smaller than that of the first section of arc-shaped side wall, and the third section of arc-shaped side wall extends along the radial direction of the first section of arc-shaped side wall, so that a hot air outlet channel is formed between the second section of arc-shaped side wall and the third section of arc-shaped side wall.

According to a preferred embodiment, two ends of the arc-shaped side wall of the third section form two arc surfaces with opposite bending directions.

According to a preferred embodiment, the air heating assembly further comprises a heat generating element disposed below the hot air fan.

According to a preferred embodiment, the air heating assembly further comprises a motor support arranged above the heat shield, and the motor is fixed on the motor support.

According to preferred embodiment, the air heating subassembly still includes the cold wind fan, is equipped with cold wind air intake and cold wind air outlet on the motor support, and the motor shaft of motor passes the cold wind air intake and is connected with the cold wind fan to inject the cold wind fan in the inner space of motor support, inner space and cold wind air intake and cold wind air outlet intercommunication.

According to a preferred embodiment, the interior space has an opening below it, into which a heat shield is inserted and closes the opening.

According to a preferred embodiment, the fan blades of the cold-air fan are covered with a hollow annular cover plate, so that when the cold-air fan rotates, the cold-air fan sucks air from the hollow part of the annular cover plate and discharges the air laterally.

According to a preferred embodiment, the area of the cold air inlet opening is larger than the area of the hollow area of the annular cover plate of the cold air fan.

A cooking appliance comprising the air heating assembly described above.

According to the air heating assembly, the heat insulation cover with the volute-shaped groove is utilized, so that hot air can be smoothly discharged from the hot air outlet along the hot air outlet channel, noise generated in the hot air discharging process is reduced, and user experience of the cooking appliance is improved. Further, this use neotype air heating subassembly can also be including setting up the cold wind fresh air inlet of the haplopore structure on motor support and covering the cold wind fan that has the annular apron for the air inlet efficiency of cold wind can improve, thereby has reduced the noise that produces among the cold wind discharge process and has improved cooking appliance's radiating efficiency.

Drawings

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

FIG. 2 is a schematic view of a heat shield in an air heating assembly according to an embodiment of the present invention.

Description of reference numerals:

11-motor, 110-motor shaft; 12-a motor bracket, 120-a cold air inlet and 121-a cold air outlet;

13-a gasket; 14-a cold air fan;

15-heat shield, 150-volute groove, 151-first section arc side wall, 152-second section arc side wall, 153-third section arc side wall

Segment arc side wall, 154-hot air outlet, 155-motor shaft hole;

16-a spacer column; 17-a hot air fan; 18-a self-locking nut; 19-heating element.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments are described in detail below 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.

The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intervening device between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including 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 unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

FIG. 1 is an exploded schematic view of an air heating assembly according to an embodiment of the present invention. As shown in fig. 1, the air heating assembly includes a motor 11, a heat shield 15, and a hot air fan 17. The air heating assembly may further include a motor bracket 12, a spacer 13, a cool air fan 14, a spacer 16, a self-locking nut 18, and a heating element 19. The motor 11 is fixedly mounted on the motor bracket 15, for example, by screws. The motor bracket 15 is provided with a cool air inlet 120 at the upper part thereof, a cool air outlet 121 at the side thereof, and an inner space for accommodating the cool air fan 14 therein. The inner space is communicated with the cold air inlet 120 and the cold air outlet 121. The motor 11 is installed above the cool air inlet opening 120, and the motor shaft 110 of the motor 11 passes through the cool air inlet opening 120 into the inner space of the motor bracket 12 and through the spacer 13 and the shaft hole of the cool air fan 14, so that the cool air fan 14 can be rotated in the inner space of the motor bracket 12 by the driving of the motor 11. In the present embodiment, the annular cover plate covers the fan blades of the cooling fan 14. When the cold-air fan 14 is rotated by the driving of the motor 11, the cold-air fan 14 sucks air from the hollow portion of the annular cover plate and discharges the air laterally. Driven by the cool air fan 14, air outside the motor bracket 12 enters the inner space of the motor bracket 12 through the cool air inlet 120 and flows to the cool air outlet 121 laterally. Therefore, the air outside the motor bracket 12 flows in the housing of the cooking appliance under the driving of the cold air fan 14, so that the heat of the components in the housing of the cooking appliance can be dissipated through the flowing air. In the present embodiment, the cold-air intake opening 120 is designed to have a single hole structure, and the area thereof is larger than the area of the hollow area of the annular cover plate of the cold-air fan 14, and is equivalent to the lower surface area of the motor 11, or is larger than the lower surface area of the motor 11. Different from the porous structure that adopts among the prior art, the cold wind air intake 120 of haplopore structure can improve the air inlet efficiency of cold wind, reduces the noise that produces when the air passes through cold wind air intake 120, improves user experience.

In the present embodiment, a heat shield 15 is provided below the motor bracket 12 and the cool air fan 14. The profile of the heat shield 15 matches the lower opening of the motor support 12 so that the heat shield 15 can be inserted into the lower opening of the motor support 12 and close the lower opening of the motor support 12, thereby separating the cooking chamber below the heat shield 15 from the motor support 12 above the heat shield 15 and preventing heat in the cooking chamber from being transferred upwards. After passing through the shaft hole of the cool air fan 14, the motor shaft 110 of the motor 11 further passes through the motor shaft hole 155 of the heat shield 15, and is connected to the warm air fan 17. The motor shaft 110 is sleeved with a spacer 16 between the cold air fan 14 and the hot air fan 17 for limiting a distance between the cold air fan 14 and the hot air fan 17. The end of the motor shaft 110 has an external thread. The hot air fan 17 and the cold air fan 14 can be fixed on the motor shaft 110 by screwing the self-locking nut on the external thread of the end of the motor shaft 110. A heating element 19 is provided below the hot air fan 17. Typically, the heating element 19 may be implemented, for example, using a spiral heating tube. The heating element 19 may be fixed to the heat shield 15. The heat shield 15 defines the upper surface of the cooking chamber so as to prevent heat within the cooking chamber from continuing to propagate upwardly. When the hot air fan 17 is driven to rotate by the motor 11, air in the cooking cavity of the cooking appliance circulates in the cooking cavity through the heating element 19 under the driving of the hot air fan 17, wherein a portion of the air is discharged out of the cooking cavity through the hot air outlet 154.

The overall structure of the air heating assembly according to the embodiment of the present invention is described above. The structure of the heat shield 15 according to an embodiment of the present invention will be described in detail with reference to fig. 2. As shown in fig. 2, the heat shield 15 is provided with a volute-shaped groove 150 therein. The volute shaped recess 150 includes a generally circular lower portion and an upper end portion including a hot air outlet 154. The center of the substantially circular lower portion is provided with a motor shaft hole 155, and the motor shaft 110 of the motor 1 can pass through the heat shield 15 through the motor shaft hole 155 to be connected with the hot blast fan 17, and the hot blast fan 17 is defined in the volute groove 150. The volute groove 150 includes a first arc-shaped sidewall 151, and a second arc-shaped sidewall 152 and a third arc-shaped sidewall 153 connected to both ends of the first arc-shaped sidewall 151, respectively. The curvature of the second section arc-shaped sidewall 152 is smaller than that of the first section arc-shaped sidewall 151, and the third section arc-shaped sidewall 153 extends substantially along the radial direction of the first section arc-shaped sidewall 151, so that a hot air outlet channel is formed between the second section arc-shaped sidewall 152 and the third section arc-shaped sidewall 153. The hot air outlet channel leads to the hot air outlet 154. In this embodiment, the third section of arc-shaped sidewall 153 is substantially wave-shaped, and two ends of the third section of arc-shaped sidewall form two arc surfaces with opposite bending directions, so that the hot air outlet channel can smoothly guide air to the hot air outlet 154. When the hot air fan 17 is rotated by the motor 11, a portion of the air flows downward, is heated by the heating element 19, and circulates in the cooking cavity. Another part of the air flows laterally, flows to the hot air outlet 154 through the hot air outlet channel under the guidance of the first arc-shaped side wall 151, the second arc-shaped side wall 152 and the third arc-shaped side wall 153, and is discharged from the hot air outlet 154. The design of the volute-shaped groove 150 can smoothly guide and discharge part of the air to the hot air outlet 154, thereby effectively reducing noise generated in the hot air discharge process and improving user experience of the cooking appliance.

The air heating assembly according to the embodiment of the utility model can be installed in any cooking appliance with an air fryer function. For example, the air fryer, the air oven, the steam oven, the air-fried microwave oven, the air-fried pressure cooker, the air-fried electric cooker, and other cooking appliances can be equipped with the air heating assembly described above for realizing the function of the air fryer.

Thus, various embodiments of the present invention have been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. From the above description, it will be fully apparent to those skilled in the art how the technical solutions of the present invention can be implemented.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the utility model. 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 assembly for cooking appliance, characterized in that, air heating assembly includes that motor (11) separates heat exchanger (15) and hot-blast fan (17), is equipped with volute shape recess (150) on separating heat exchanger (15), and the tip of volute shape recess (150) is equipped with hot-blast air outlet (154), and motor shaft (110) of motor (11) pass to separate heat exchanger (15) and be connected with hot-blast fan (17) and inject hot-blast fan (17) in volute shape recess (150) for the air is discharged from hot-blast air outlet (154) under hot-blast fan (17)'s drive.

2. The air heating assembly according to claim 1, wherein the volute groove (150) comprises a first section of arc-shaped side wall (151), and a second section of arc-shaped side wall (152) and a third section of arc-shaped side wall (153) which are respectively connected with two ends of the first section of arc-shaped side wall (151), the curvature of the second section of arc-shaped side wall (152) is smaller than that of the first section of arc-shaped side wall (151), and the third section of arc-shaped side wall (153) extends along the radial direction of the first section of arc-shaped side wall (151), so that a hot air outlet channel is formed between the second section of arc-shaped side wall (152) and the third section of arc-shaped side wall (153).

3. The air heating assembly of claim 2, wherein the two ends of the third segment of curved side wall (153) form two curved surfaces with opposite bending directions.

4. Air heating assembly according to claim 1, further comprising a heating element (19), the heating element (19) being arranged below the hot air fan (17).

5. The air heating assembly according to claim 1, further comprising a motor support (12) disposed above the heat shield (15), the motor (11) being secured to the motor support (12).

6. The air heating assembly according to claim 5, further comprising a cold air fan (14), wherein the motor bracket (12) is provided with a cold air inlet (120) and a cold air outlet (121), and a motor shaft (110) of the motor (11) passes through the cold air inlet (120) to be connected with the cold air fan (14) and defines the cold air fan (14) in an inner space of the motor bracket (12), and the inner space is communicated with the cold air inlet (120) and the cold air outlet (121).

7. Air heating assembly according to claim 6, characterized in that the inner space has an opening below it, into which opening a heat shield (15) is inserted and closes.

8. The air heating assembly according to claim 6, wherein the fan blades of the cold air fan (14) are covered with a hollow annular cover plate, such that when the cold air fan (14) rotates, the cold air fan (14) draws air in from the hollow portion of the annular cover plate and discharges the air laterally.

9. The air heating assembly of claim 7, wherein the area of the cool air intake opening (120) is larger than the area of the hollow region of the annular cover plate of the cool air fan (14).

10. Cooking appliance, characterized in that it comprises an air heating assembly according to any one of claims 1 to 9.