Double hot air circulation device and cooking equipment thereof

Abstract

The utility model discloses a double hot air circulation device and cooking equipment thereof, which comprises a hot air cover, a back plate, a heating pipe and an air guide cover, a plurality of first air inlet holes are arranged on the hot air cover, a cavity is formed between the hot air cover and the back plate, a first fan and a second fan are arranged in the cavity, an air outlet is formed between the hot air cover and the outer peripheral edge of the back plate, and the heating pipe is connected with the air guide cover. The heating pipe is installed on the back plate and located in the cavity, the wind scooper is located in the cavity and provided with a plurality of second air inlet holes and air outlet holes, the first air inlet holes right face the second air inlet holes, and the second air inlet holes right face the first draught fan and the second draught fan. The double fans are adopted, the wind scoopers are arranged outside the fans in a covering mode, wind is gathered, the wind volume is increased, hot wind convection is increased, the hot wind hoods and the peripheral edge of the back plate are combined to form the wind outlets, hot wind is blown out around the peripheral edge, the hot wind is more dispersed, hot wind can be blown out around the top, the left side and the right side of the inner container of the cooking equipment, and the cooking equipment is more comfortable. 360-degree surrounding hot air is formed, so that the temperature field is more uniform.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and particularly relates to a double hot air circulation device and a cooking device thereof. Background Art

[0002] Existing cooking devices with baking functions generally improve the baking efficiency through hot air circulation. The hot air circulation mainly blows the heated air out of the air outlet on the back panel of the hot air blower into the inner cavity to bake the food in the inner cavity, and the cold air in the inner cavity returns to the back panel of the oven from the air inlet on the back panel, thus realizing the hot air circulation. It can be seen that the structure of the hot air circulation has a great influence on the baking of cooking devices.

[0003] At present, there are two types of hot air circulation for cooking devices, namely single fan and double fans. The hot air circulation method of a single fan is to install the single fan in the middle position on the back of the cooking device. This method is prone to dead corners. When cooking food, the food near the middle position is prone to be overheated, while the food near the corners of the inner cavity is underheated, and the middle food is prone to be burnt. Therefore, a double-fan hot circulation method appears on the market. For example, a steam oven with double-fan convection disclosed in CN202321808317.9 has an installation cavity provided at the back panel position of the inner cavity. The installation cavity is communicated with the inner cavity, and two fan blades are arranged left and right in the installation cavity. A driving motor for driving the fan blades to rotate is arranged outside the inner cavity, and a heating device is not installed in the installation cavity. The steam oven arranges the heating tubes on the inner top wall of the inner cavity and the heating plate on the inner bottom wall of the inner cavity. By using the rotation of the fan to stir the air inside the inner cavity and disperse the heat, this structural design makes the preheating time required before using the oven longer, the temperature rise inside the oven slower, and the food near the heating tubes is overheated, resulting in poor temperature field uniformity. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a double hot air circulation device to solve the technical problem of poor temperature field uniformity of the existing hot air circulation device.

[0005] The double hot air circulation device of the utility model can be realized by the following technical solutions:

[0006] A double hot air circulation device includes: a hot air cover, on which a plurality of first air inlet holes are provided; a back panel, a chamber is formed between the hot air cover and the back panel, a first fan and a second fan are installed in the chamber, and a plurality of air outlet holes are formed at the outer peripheral edges of the hot air cover and the back panel; a heating tube, which is installed on the back panel and located in the chamber; a wind guide cover, which is located in the chamber, and a plurality of second air inlet holes and air outlet holes are provided on the wind guide cover. The first air inlet holes are directly opposite to the second air inlet holes, and the second air inlet holes correspond to the positions of the first fan and the second fan.

[0007] In one embodiment, the first air inlet holes are arc-shaped strip air inlet holes, and a plurality of the first air inlet holes are arranged radially. The bending direction of the strip air inlet holes is the same as the rotation direction of the first fan or the second fan opposite thereto.

[0008] In one embodiment, the air guide cover includes a front plate and side plates. The front plate and the side plates enclose an inner cavity. The second air inlet holes are provided on the front plate, and the air outlet holes are provided on the side plates. The first fan and the second fan are located inside the inner cavity.

[0009] In one embodiment, there are two air guide covers, and the two air guide covers are respectively sleeved outside the first fan and the second fan. A plurality of the first air inlet holes are arranged in two groups of air holes, and the two groups of air holes are respectively opposite to the first fan or the second fan.

[0010] In one embodiment, a partition is provided on the back plate, and the partition divides the chamber into a first chamber and a second chamber. The first fan is located in the first chamber, and the second fan is located in the second chamber.

[0011] In one embodiment, the aperture of the first end of the strip air inlet hole is larger than that of the second end, and a plurality of the first air inlet holes are arranged to form a turbine-shaped air hole.

[0012] In one embodiment, a graphene heating film is coated on the surface of the heating tube.

[0013] In one embodiment, the heating tube includes a first heating tube and a second heating tube. The first heating tube is arranged around the first fan or the air guide cover, and the second heating tube is arranged around the second fan or the air guide cover.

[0014] In one embodiment, a positioning groove is provided on the back plate, and the side plate is stuck in the positioning groove.

[0015] The present utility model further provides a cooking device, including the double hot air circulation device described above, and the double hot air circulation device is installed on the back of the inner tank of the cooking device.

[0016] Compared with the prior art, the double hot air circulation device of the present utility model has the following beneficial effects: By adopting double fans and sleeving an air guide cover outside the fans, the air is gathered, the air volume is increased, the hot air convection is increased, and an air outlet is formed in combination with the outer peripheral edge of the hot air cover and the back plate, so that hot air lingers and blows out along the entire outer peripheral edge, and the hot air is more dispersed; when the double hot air circulation device is installed in a cooking device, hot air can linger and blow out on the top, left and right sides of the inner tank of the cooking device, forming 360° circumferential hot air, thereby making the temperature field more uniform. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of the dual hot air device of the present utility model;

[0019] Figure 2 is an exploded decomposition schematic diagram of the dual hot air device of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the back plate in the dual hot air device of the present utility model, including an air guide cover;

[0021] Figure 4 is Figure 1 a schematic structural diagram of the dual hot air device shown in another direction;

[0022] Figure 5 is Figure 4 an enlarged view of part A in the schematic structural diagram of the dual hot air device shown;

[0023] Figure 6 is a schematic structural diagram of the hot air cover in the dual hot air device of the present utility model;

[0024] Figure 7 is a schematic structural diagram of the cooking device of the present utility model, including a dual hot air device.

[0025] Reference numerals in the figures: 100, inner container; 1, hot air cover; 11, first air inlet hole; 111, first end; 112, second end; 2, back plate; 21, partition board; 22, positioning groove; 4, first blower; 5, second blower; 6, air outlet; 7, heating pipe; 8, air guide cover; 81, second air inlet hole; 82, air outlet hole; 83, front plate; 84, side plate. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0028] As Figure 1-7 shown, an embodiment of the present invention provides a double hot air circulation device, which includes a hot air hood 1, a back plate 2, a heating pipe 7, a first fan 4, a second fan 5, and a wind guide hood 8. The hot air hood 1 is provided with a plurality of first air inlet holes 11. A chamber is formed between the hot air hood 1 and the back plate 2. The first fan 4 and the second fan 5 are installed in the chamber. The outer peripheral edges of the hot air hood 1 and the back plate 2 form a plurality of air outlet holes 6. That is, after the hot air hood 1 and the back plate 2 are installed together, the space between them is the chamber, and the outer peripheral edges of them are the air outlet holes 6. The air outlet holes 6 can be provided at the outer peripheral edges of the hot air hood 1 and the back plate 2. The heating pipe 7 is installed on the back plate 2. The heating pipe 7 and the wind guide hood 8 are located in the chamber. The wind guide hood 8 is provided with a plurality of second air inlet holes 81 and air outlet holes 82. The first air inlet holes 11 are directly opposite to the second air inlet holes 81. The second air inlet holes 81 correspond to the positions of the first fan 4 and the second fan 5. In this embodiment, the heating pipe 7 can be installed inside the wind guide hood 8 or outside the wind guide hood 8, and the specific position is not limited.

[0029] The double hot air circulation device of this embodiment is installed on the back of the inner cavity of a cooking device. When the first fan 4 and the second fan 5 rotate, the cold air in the inner cavity is sucked in from the first air inlet holes 11, and then converges through the second air inlet holes 81 of the wind guide hood 8 to send air to the first fan 4 and the second fan 5, and then flows out from the air outlet holes 82. After being heated by the heating pipe 7, it becomes hot air, and the hot air is blown out from the air outlet holes 6 into the inner cavity; alternatively, the hot air heated by the heating pipe 7 flows out from the air outlet holes 82 and then is blown out from the air outlet holes 6 into the inner cavity, and so on in a cycle to achieve hot air circulation.

[0030] In the double hot air circulation device of this embodiment, the cold air inhaled when the fan rotates is concentrated by the wind guide hood 8 so that the air volume is concentrated directly opposite the first fan 4 and the second fan 5, thereby increasing the rotation speeds of the first fan 4 and the second fan 5 and accelerating the hot air convection speed. By setting the air outlet holes 6 at the outer peripheral edges of the hot air hood 1 and the back plate 2, when the double hot air circulation device is installed in a cooking device such as an oven, hot air can surround and blow out above, on the left and right sides of the inner cavity. The hot air is more dispersed, forming a 360° surrounding hot air, making the temperature field in the inner cavity more uniform and the food cooking effect better.

[0031] Specifically, as Figure 1 , Figure 4 and Figure 5 shown, in this embodiment, the air outlet 6 is arranged on the top and the outer peripheries of the left and right sides of the hot air hood 1 and the back plate 2, so that hot air is blown out from the top and the left and right sides.

[0032] In this embodiment, the surface of the heating tube 7 is coated with a graphene heating film. Graphene has a high infrared radiation coefficient, which can rapidly increase the temperature, shorten the preheating time, and enhance the cooking effect.

[0033] Furthermore, as Figure 6 shown, the first air inlet hole 11 is a strip-shaped air inlet hole with an arc. A plurality of the first air inlet holes 11 are arranged radially. The bending direction of the strip-shaped air inlet hole is the same as the rotation direction of the corresponding first fan 4 or second fan 5. Setting the first air inlet hole 11 as a strip-shaped air inlet hole with an arc restricts the air inlet path and enables the air to better gather and enter the air guide hood 8. In this example, the first air inlet holes 11 are arranged in two groups of air holes. Correspondingly, each group of air holes corresponds to a different fan. For example, for the strip-shaped air inlet holes in the group of air holes corresponding to the first fan 4, their bending direction is the same as the rotation direction of the first fan 4. This is more conducive to the fan sucking air, and can also make the sucked air speed superpose with the fan rotation speed, improving the hot air convection effect and making the temperature field more uniform.

[0034] Specifically, the first air inlet hole 11 has a first end 111 and a second end 112. The aperture of the first end 111 is larger than that of the second end 112. More specifically, the aperture of the first air inlet hole 11 gradually decreases from the first end 111 to the second end 112, and the second ends 112 of a plurality of first air inlet holes 11 are arranged to form a circle, making the whole air hole in a turbine shape, so that the air sucked from the first air inlet hole 11 is in a vortex shape, which can play a certain role in promoting the fan, can greatly increase the rotation speed of the fan, and further improve the hot air convection effect and make the temperature field uniformity better.

[0035] Furthermore, as Figure 2 and Figure 3As shown in the figure, there are two air guide covers 8 in this embodiment, and the two air guide covers 8 are respectively arranged outside the first fan 4 and the second fan 5. Specifically, the air guide cover 8 includes a front plate 83 and a side plate 84, the front plate 83 and the side plate 84 enclose an inner cavity, the second air inlet hole 81 is arranged on the front plate 83, the air outlet hole 82 is arranged on the side plate 84, and the first fan 4 and the second fan 5 are located in the inner cavity. Correspondingly, several of the first air inlet holes 11 are arranged in two groups of air holes, and the two groups of air holes are respectively opposite to the first fan 4 or the second fan 5. The front plate 83 faces the first air inlet holes 11, reducing the air flow path and enabling the air volume to be better concentrated and inhaled from the second air inlet hole 81. Of course, the air guide cover 8 can also be set to one, which covers both the first fan 4 and the second fan 5. In this embodiment, the air guide cover 8 is set to two, which can isolate the two fans and weaken the mutual influence during the rotation of the two fans.

[0036] Furthermore, as Figure 2 shown, a positioning groove 22 is provided on the back plate 2, and the side plate 84 is stuck in the positioning groove 22 to fix the air guide cover 8. Of course, it can also be fixed to the back plate 2 by means of a buckle, or the size of the air guide cover 8 can be adjusted accordingly according to the distance between the air guide cover 1 and the back plate 2, so that the air guide cover 8 is just stuck between the two when the air guide cover 1 and the back plate 2 are installed. The specific implementation of the fixing method of the air guide cover 8 is not limited.

[0037] In this embodiment, the air guide cover 8 is cylindrical, the side plate 84 is surrounded in a circle, and the front plate 83 is buckled on the side plate 84. Of course, the air guide cover 8 can also be a cover body integrally formed by the front plate 83 and the side plate 84. The specific shape is not limited, and it can be a circular cover body, or a square or irregularly shaped cover body.

[0038] Further, as Figure 2 and Figure 3 shown, in order to weaken the hot air intersection and further make the temperature field more uniform, a partition plate 21 is provided on the back plate 2. The partition plate 21 divides the chamber into a first chamber and a second chamber. The first fan 4 is located in the first chamber, and the second fan 5 is located in the second chamber. Correspondingly, the two air guide covers 8 are respectively located in the first chamber and the second chamber. Such a design can completely separate the first fan 4 and the second fan 5, enabling them to work independently without affecting each other, and avoiding the hot air intersection caused by a large air volume on one side and a small air volume on the other side.

[0039] Further, the heating tube 7 includes a first heating tube and a second heating tube. The first heating tube is disposed around the first blower 4 or the air guide cover 8, and the second heating tube is disposed around the second blower 5 or the air guide cover 8. In this embodiment, when there is one air guide cover 8, preferably, the first heating tube is disposed around the first blower 4, and the second heating tube is disposed around the second blower 5, which is convenient for the installation of the heating tube and can quickly heat the cold air. When there are two air guide covers 8, with a partition 21 in the middle of the back plate 2 to divide the chamber into a first chamber and a second chamber, the first heating tube can be disposed around the first blower 4 or around the outer periphery of the air guide cover. Correspondingly, the second heating tube is the same. Preferably, the first heating tube is disposed around the first blower 4, and combined with the air guide cover 8 covering the outside of the first blower 4, the heating space can be effectively compressed, so that the inhaled cold air can be quickly heated by the heating tube and quickly blown out from the air outlet hole 82.

[0040] This embodiment also provides a cooking device, which can be any device with a baking function, such as an oven, a steam oven, an integrated stove, etc., and the specific product is not limited. The back of the inner cavity of the cooking device is installed with the above-mentioned double hot air circulation device. There is hot air swirling and blowing out on the top, left and right sides of the cooking device, and at the same time, it is equipped with strip-shaped air holes in a turbine shape, presenting a visual effect of a turbine whirlwind on the whole back during the cooking process.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A double hot air circulation device, characterized in that, Comprising: A hot air hood, on which a number of first air inlet holes are provided; A back plate, a chamber is formed between the hot air hood and the back plate, a first blower and a second blower are installed in the chamber, and a number of air outlet holes are formed at the outer peripheral edges of the hot air hood and the back plate; A heating pipe, which is installed on the back plate and located in the chamber; A wind guiding hood, which is located in the chamber, the wind guiding hood is provided with a number of second air inlet holes and air outlet holes, the first air inlet holes are directly opposite to the second air inlet holes, and the second air inlet holes correspond to the positions of the first blower and the second blower.

2. The double hot air circulation device according to claim 1, characterized in that The first air inlet holes are arc-shaped strip air inlet holes, a number of the first air inlet holes are arranged radially, and the bending direction of the strip air inlet holes is the same as the rotation direction of the first blower or the second blower opposite thereto.

3. A double hot air circulation device according to claim 1, characterized in that, The wind guiding hood includes a front plate and side plates, the front plate and the side plates enclose an inner cavity, the second air inlet holes are provided on the front plate, the air outlet holes are provided on the side plates, and the first blower and the second blower are located in the inner cavity.

4. A double hot air circulation device according to claim 2, characterized in that, There are two wind guiding hoods, the two wind guiding hoods respectively cover the outside of the first blower and the second blower, a number of the first air inlet holes are arranged in two groups of air holes, and the two groups of air holes respectively face the first blower or the second blower.

5. A double hot air circulation device according to claim 1, characterized in that, A partition is provided on the back plate, the partition divides the chamber into a first chamber and a second chamber, the first blower is located in the first chamber, and the second blower is located in the second chamber.

6. A double hot air circulation device according to claim 2, characterized in that, The aperture of the first end of the strip air inlet hole is larger than the aperture of the second end, and a number of the first air inlet holes are arranged to form a turbine-shaped air hole.

7. A double hot air circulation device according to claim 1, characterized in that, A graphene heating film is coated on the surface of the heating pipe.

8. A double hot air circulation device according to claim 4 or 7, characterized in that, The heating pipe includes a first heating pipe and a second heating pipe, the first heating pipe surrounds the first blower or the wind guiding hood, and the second heating pipe surrounds the second blower or the wind guiding hood.

9. A double hot air circulation device according to claim 3, characterized in that, A positioning groove is provided on the back plate, and the side plate is stuck in the positioning groove.

10. A cooking device, characterized in that, Comprising the double hot air circulation device according to claims 1-9, the double hot air circulation device is installed on the back of the inner liner of the cooking device.

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