CN108402921A - Heated air circulation device and oven - Google Patents

Abstract

The present invention discloses a kind of heated air circulation device and oven.Heated air circulation device includes air bells cap, collectively forms hot wind back plate, the electrothermal tube in hot air duct and the motor for being rotated with movable vane piece of hot air duct with air bells cap, which is fixed on the lateral surface of hot wind back plate；The front end face of air bells cap is equipped with air inlet area and is equipped at intervals with multiple wind outlet areas around the air inlet area, multiple air inlet holes are distributed at each interval in the air inlet area, multiple exhaust vents are distributed at each interval in each wind outlet area, the air inlet hole, the exhaust vent are axially connected to the hot air duct；The guiding device of at least one air-flow guiding wind outlet area for preventing air in hot air duct from generating vortex in blade rotation process and rotating blade is equipped in hot air duct.The present invention ensures that heated air circulation device has hot wind air output good and uniform feature is discharged in hot wind with simple structure.

Description

Hot air circulation device and oven

technical field

The invention relates to heating technology, in particular to a hot air circulation device and an oven with the hot air circulation device.

Background technique

Existing ovens appear to adopt hot air circulation function to provide baking efficiency. Moreover, different technical means are used in the prior art to improve the hot air outlet efficiency so that the baked food can be evenly baked.

For example, CN2016212624180 proposes an oven with a hot air circulation function, including an oven body and a hot air circulation assembly, the oven body includes a panel, the hot air circulation assembly includes an air cover and blades, and the air cover and the panel together form a cavity body, the cavity is a volute structure, and the air inlet area is located in the helical section of the volute structure. The technical scheme can effectively compress the wind thrown by the blades by setting the air inlet position of the hot air circulation component as a spiral section, thereby increasing the wind speed of the hot air circulation component, thereby improving the penetration depth of the hot air circulation and heat convection. efficiency, and improved oven thermal efficiency. The disadvantage of this technical solution is that the structure is complex due to the need for the cavity to be a volute structure, and the requirements for production, processing and manufacturing are relatively high.

Contents of the invention

The invention provides a hot air circulation device and an oven with the hot air circulation device. The hot air circulation device has the characteristics of good air volume and uniform hot air discharge, which is beneficial to improve the baking quality of the oven.

A hot air circulation device, comprising a hot air cover, a hot air back plate forming a hot air duct together with the hot air cover, an electric heating tube arranged in the hot air duct, and a motor for driving blades to rotate, and the motor is fixed on the outer surface of the hot air back plate The front face of the hot air cover is provided with an air inlet area and a plurality of air outlet areas are arranged at intervals around the air inlet area, and a plurality of air inlet holes are distributed in the air inlet area at intervals, each of the air outlet A plurality of air outlet holes are distributed at intervals in the area, and the air inlet holes and the air outlet holes are axially connected to the hot air passage; at least one is provided in the hot air passage to prevent the hot air passage The air generates a vortex during the rotation of the blades and directs the air flow of the blades to the air guide device in the wind outlet area.

Wherein, the air guide device is an L-shaped air guide baffle, the first end of the air guide plate is fixed on the hot air rear plate or the hot air cover, and the second end of the air guide plate is located in the hot air duct to generate air flow when the blades rotate on the flow path.

Wherein, the number of guide baffles is at least two, and each guide baffle is staggered and arranged in the hot air duct.

Wherein, the electric heating pipe is extended and laid along the direction of the hot air duct, and is partially arranged as a curved part for increasing the heat dissipation area and blocking the flow of air in the hot air duct.

Wherein, the air inlet area is set at the central position of the front face of the hot air hood, and the air outlet area is arranged at the upper left corner, upper right corner, lower left corner and lower right corner of the front face of the hot air hood around the air inlet area.

Correspondingly, the present invention proposes an oven, which at least includes an oven body having a baking cavity, and one side plate of the oven body is provided with the hot air circulation device.

Wherein, a base is provided under the oven body, and the base includes a bottom plate with a first cooling notch and side plates surrounding the edges of the bottom plate, and there is an accommodation space between the base and the oven body, and the accommodation space A power module is provided; the rear cover plate of the hot air circulation device is covered on the outer side of the oven body, and there is a heat dissipation space between the rear cover plate and the hot air circulation device. The motor of the hot air circulation device is located in the heat dissipation space, and the rear cover The cover plate has several second cooling notches.

Wherein, one of the side plates of the base is provided with an axial flow fan, and the air inlet and the air outlet of the axial flow fan respectively communicate with the accommodation space and the heat dissipation space.

Wherein, the baking cavity is equipped with a water tank through a detachable structure.

Wherein, the upper left corner, lower left corner, upper right corner or/and lower right corner of the front face of the hot air hood is provided with an air outlet area, and the water tank is close to the upper left corner, lower left corner, upper right corner or lower right corner of the hot air hood. wind area setting; or, the upper left corner, the lower left corner, the upper right corner, and the lower right corner of the front face of the hot air cover are respectively provided with an air outlet area, and the two ends of the water tank are respectively set close to one of the air outlet areas so that the water tank is located at the The upper middle part, the lower end middle part, the left middle part or the right middle part of the front end face of the hot air cover.

The present invention substantively solves the technical problem of "how to use a simple structure to ensure that the hot air circulation device (component) has a good hot air outlet capacity (the hot air outlet volume is good and the air outlet is uniform)" through the following technical means, and thus has The beneficial technical effect is as follows:

1. The hot air circulation device achieves better hot air outlet efficiency with a simple structure. The present invention prevents eddy currents from being generated and directs the hot air flow to the wind outlet area by providing a flow guide device in the hot air duct. The structure of the flow guide device is simple, the implementation cost is low, and the installation position is relatively flexible.

2. The hot air circulation device is used in the oven, the air volume of the hot air is good and the hot air is discharged evenly.

By setting the air outlet area on the front face of the hot air cover, a plurality of air outlet areas are arranged at intervals around the air outlet area on the front face of the hot air cover. The hot air is evenly discharged into the baking cavity of the oven body from the air outlet holes in different positions, and the hot air outlet capacity of the air outlet holes is ensured by setting a guide device in the hot air duct, so the setting of the air outlet area The way and the two technical features of the air guide device in the hot air duct interact together to ensure that the hot air circulation device discharges hot air from the air outlet area with good air volume and uniform hot air discharge, so as to ensure that the food in different positions can be baked with the same heat as much as possible Baking to achieve the same baking quality as possible; moreover, the cycle of hot air discharged from the hot air circulation device from the air inlet to the outlet is greatly shortened, reducing heat loss, heating faster and more fully, thereby improving product performance , more energy saving and environmental protection.

3. A water tank is installed in the baking cavity of the oven body to replenish water, which can make the baked food taste fresh and tender. And the sink is detachable to ensure that the sink is very convenient to add water, clean and maintain.

4. An axial flow fan is set on the side plate of the base to connect with the accommodation space where the power module is located and the heat dissipation space where the motor is located, ensuring better heat dissipation capabilities of the power module and the motor, which is conducive to improving the stability and reliability of the oven. sex.

Description of drawings

Fig. 1 is a schematic diagram of an exploded structure of a hot air circulation device (the hot air cover is not shown).

Fig. 2 is a three-dimensional schematic view of the hot air circulation device (the hot air cover is not shown).

Fig. 3 is a schematic diagram of an exploded structure of the oven.

Fig. 4 is a structural schematic view of the oven without the door body.

Fig. 5 is a schematic diagram of the internal structure of the oven.

Wherein, the dotted line with arrows in the figure indicates the flow path of heat or hot air.

Detailed ways

In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present application will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

As shown in Fig. 1 and Fig. 2, the present invention discloses a hot air circulation device, comprising: a hot air hood (the hot air hood is not shown in Fig. The air inlet area is provided with a plurality of air outlet areas at intervals, and a plurality of air inlet holes are distributed in the air inlet area at intervals, and a plurality of air outlet holes are distributed in each of the air outlet areas at intervals , the air inlet hole and the air outlet hole are axially connected to the hot air duct; together with the hot air cover, the hot air rear plate 41 of the hot air duct is formed. The hot air duct is a relatively closed space, and the air inlet The holes and the air outlet holes are all connected to the hot air duct; the electric heating tube 42 fixed in the hot air duct by the fixing piece 45 is used to generate heat to heat the air in the hot air duct; the blades arranged in the hot air duct 43; the motor 44 used to drive the blades 43 to rotate, the blades 43 are fixedly connected to the rotating shaft of the motor 44, and the motor 44 is fixed on the outer surface of the hot air rear plate 41; at least one guide device 46 arranged in the hot air duct, the guide The device 46 is used to prevent the air in the hot air channel from generating eddy currents during the rotation of the blades 43 and guide the air flow of the blades 43 to the air outlet area of the hot air cover.

The hot air circulation device will be used in conjunction with an external airtight chamber (for example, the following will focus on the application scenario of the hot air circulation device used in the oven), and the hot air circulation device will be used to generate circulating hot air for the airtight chamber. After power on, the motor 44 drives the blades 43 to work. During the rotation of the blades 43, cold air is inhaled from the external airtight cavity through the air inlet of the hot air cover. The cold air exchanges heat with the electric heating tube 42 in the hot air duct to become hot air. After the air is diverted by the deflector 46, it is discharged from the air outlet of the hot air cover to the external airtight chamber under the rotation of the blades 43, so as to circulate repeatedly, thereby generating circulating hot air for the airtight chamber. It can be seen from the above description that if the blade 43 generates eddy currents in the hot air passage during the rotation process, only a small amount of hot air in the hot air passage will be discharged from the air outlet of the hot air cover, and correspondingly it is difficult to inhale cold air from the closed cavity. , so that the circulating hot air cannot be effectively generated! For this reason, the present application changes the flow path of the heat flow generated in the hot air channel during the rotation of the blades 43 by arranging at least one flow guiding device 46 in the hot air channel to prevent eddy currents, thereby improving the air outlet efficiency of the hot air circulation device.

In one embodiment, the deflector 46 includes an L-shaped deflector, the first end of the deflector is fixed on the hot air back plate 41 or the hot air cover 42, and the second end of the deflector is located at When the blades 43 in the hot air duct rotate, the flow path of the airflow is generated. Through the second end of the guide plate, the air flow generated when the blade 43 rotates is blocked so that part of the air flow changes the flow path, which not only prevents the vortex from being generated in the hot air duct during the rotation of the blade 43, but also can pass through the second end of the guide plate. When the blade 43 is rotated at the end, the airflow is directed to the air outlet of the hot air cover.

In one embodiment, the flow guide device 46 includes a plurality of L-shaped flow guide baffles. Each guide baffle is staggered with each other and arranged in the hot air passage, and through the joint action of multiple guide baffles, it is completely prevented from generating eddy currents in the hot air passage during the rotation of the blades 43 .

In one embodiment, the hot air rear plate 41 includes a first rear plate 411 for installing the motor 44 and a second rear plate 412 for installing the electric heating pipe 42, and the second rear plate 412 is installed on the first rear plate 411. medial side.

In one embodiment, in order to improve the heating capacity of the electric heating pipe 42 to the air in the hot air passage, and to assist the guide device 46 to prevent eddy currents in the hot air passage, the electric heating pipe 42 is extended along the direction of the hot air passage and laid. Locally set as a bend. For example, if the cross section of the hot air duct is circular or square, the electric heating tube 42 is also circular or square and laid in the hot air duct, and part of the electric heating tube 42 is arranged as a curved part to increase the heat exchange surface area through the curved part and Block the flow of air in the hot air duct. Wherein, a through hole 410 is provided on one side of the hot air rear plate 41, and the two ends 421 of the electric heating pipe 42 pass through the through hole 410 and are electrically connected with the power module (not shown in FIGS. 1 and 2).

Taking the application of the hot air circulation device in an oven as an example, the structure and working principle of the hot air circulation device and the beneficial technical effects brought to the oven will be further described.

Combined with Figure 3, Figure 4 and Figure 5. The oven comprises: an oven body 1 with a door body 11, the oven body 1 has a baking cavity, and a grill 12 for placing food is arranged in the baking cavity; a base 2 arranged under the oven body 1, the base The seat 2 includes a base plate 21 and side plates 22 surrounding the edges of the base plate 21, and there is a receiving space between the base 2 and the oven body 1, and a power module 5 is arranged in the receiving space; The hot blast circulation device on the side plate, wherein, with the hot blast cover 40 of the hot blast circulation device as one of the side plates of the oven body 1, such as, the hot blast circulation device is located at the relative door body 11 and the front end of the hot blast cover 40 is provided with The air inlet area is provided with a plurality of air outlet areas around the air inlet area, and a plurality of air inlet holes 401 are distributed in the air inlet area at intervals, and each of the air outlet areas is distributed in intervals with each other. A plurality of air outlet holes 402, the air inlet hole 401 and the air outlet hole 402 are axially connected to the hot air duct, and the two ends 421 of the electric heating tube 42 are electrically connected to the power module 5; fixed on the oven body 1 The outer surface is covered with the rear cover 3 of the hot air circulation device. There is a heat dissipation space between the rear cover 3 and the hot air circulation device. The motor 44 of the hot air circulation device is located in the heat dissipation space. The rear cover 3 has several The second cooling notch 31 .

As shown in Figure 4, in one embodiment, the air inlet area is arranged on the central position of the front end face of the hot air cover 40, and the air outlet area is surrounded by the air inlet area, that is, the air outlet area is arranged on the upper left corner of the front end face of the hot air cover 40, The positions of the upper right corner, the lower left corner and the lower right corner, this setting can make the distribution of the air outlet 402 more compact and even, not only can the hot air discharged by the hot air circulation device be evenly discharged from the air outlet 402 in different positions to the oven body 1 to ensure that the food in different positions can be baked with the same heat as much as possible to achieve the same baking quality as possible; moreover, the hot air discharged from the hot air circulation device flows from the air inlet hole 401 to the air outlet hole 402 The circulation stroke of the outflow is greatly shortened, reducing heat loss, heating faster and more fully, thereby improving product performance, and being more energy-saving and environmentally friendly. This heat shield with improved performance is suitable for products with heating functions of different specifications, such as ovens of different specifications, and a refraction surface can be further added to the inner wall of the baking cavity to form a hot air flow path with a shorter path.

When the oven was turned on, the hot air produced by the hot air circulation device was blown into the baking cavity of the main body 1 of the oven from the air outlet holes 402 in each air outlet area of the front end of the hot air cover 40 to bake and heat the grill 12. The air inlet hole 401 on the front surface of the hot air cover 40 sucks the air in the baking cavity to the hot air channel of the hot air circulation device and is heated by the electric heating tube 42 to form a hot air circulation, thereby forming hot air convection in the baking cavity of the oven body 1 , so that the baking cavity can use hot air convection to bake the food on the grill 12, giving way to the food at different positions on the grill 12

Moreover, in order to make the food less water loss during the baking process so that the baked food has a fresh and tender taste, a detachable water tank 7 can also be provided in the baking cavity of the oven main body 1 . The water tank 7 adopts a detachable structure and is installed on the inner wall of the oven main body 1, and can also be installed on the door body 11, and even the water tank 7 has a hook to hang on the grill 12. The hot air in the baking cavity blown into the oven main body 1 from the air outlet 402 passes through the water tank 7 to evaporate the water in the water tank 7 to generate steam, and the steam adds moisture to the food being baked so as to make the food rich in water and taste fresh purpose. Since the water tank 7 adopts a detachable structure and is installed in the baking cavity, the water tank is installed when fresh and tender taste is needed, and the water tank is removed when steam is not needed, which facilitates the user to choose the taste, and is easy to operate and use. At the same time, the detachable water tank also facilitates the user to clean the water tank, further improving the user experience.

In one embodiment, the water tank 7 is installed on the front face of the hot air cover 40 through a detachable structure. Specifically, the detachable structure includes: a groove located on the front surface of the hot air cover 40 with the notch facing upwards, and a hook extending downward from the outer surface of the water tank 3 and capable of being inserted into the groove. Alternatively, the detachable structure includes: a groove located on the outer surface of the water tank 3 with the notch facing downward, and a hook extending upward from the front surface of the hot air cover 40 and capable of being inserted into the groove. The detachable installation of the water tank 7 on the front surface of the hot air cover 40 is realized by inserting the hook into the groove.

In one embodiment, the upper left corner, the lower left corner, the upper right corner or/and the lower right corner of the hot air cover 40 are provided with an air outlet area, and the water tank 7 is close to the upper left corner, lower left corner, and upper right corner of the hot air cover 40 Or the air outlet area setting in the lower right corner. Or, the upper left corner, the lower left corner, the upper right corner, and the lower right corner of the hot air cover 40 are respectively provided with air outlet areas, and the two ends of the water tank 7 are respectively arranged close to one of the air outlet areas so that the water tank 7 is located in the hot air cover 40 upper middle, lower middle, left middle, or right middle of the . By arranging the water tank 7 close to at least one of the wind outlet areas, it is convenient for the blown hot air to pass through the water tank 7 to improve the steam generation capacity.

In one embodiment, an axial flow fan 6 is arranged on one of the side plates 22 of the base 2, and the air inlet of the axial flow fan 6 communicates with the accommodation space between the base 2 and the oven body 1, and the axial flow fan 6 The air outlet of 6 communicates with the heat dissipation space between the rear cover plate 3 and the hot air circulation device. Moreover, a first cooling notch 211 is disposed on the bottom plate 21 of the base 2 . The present invention uses the work of the axial flow fan 6 to enhance the heat dissipation effect: when the axial flow fan 6 is turned on, cold air is sucked in from the first heat dissipation notch 211 at the bottom of the accommodation space, and the cold air passes through the surface of the power module 5 to dissipate heat for the power module 5 , then the air is sent from the accommodating space to the heat dissipation space through the axial flow fan 6, and the air pressure in the heat dissipation space increases thereupon to accelerate the air to flow through the motor 44, and then let the hot air accelerate from the second heat dissipation slot of the rear cover plate 3 31 discharge. Therefore, the present invention has played a cooling effect on the power module 5 and the motor 44 by adding the axial flow fan 6 at the same time, which is beneficial to ensure that the power module 5 and the motor 44 will not fail due to overheating, thereby improving the working stability of the hot air circulation device and the oven sex and reliability.

Furthermore, the second cooling notch 31 of the rear cover 3 is disposed close to the motor 44 so that the hot air can be discharged more quickly. Moreover, the motor 44 is located between the air outlet of the axial flow fan 6 and the second heat dissipation slot 31 , so that the cold air must pass through the motor 44 to ensure heat dissipation to the motor 44 from the second heat dissipation slot 31 .

Further, in order to ensure the heat dissipation capability of the power module 5 , the power module 5 is fixed on the bottom plate 21 and the power module 5 is located between the axial flow fan 6 and the first heat dissipation notch 211 . Such setting makes the power module 5 be located on the air flow path from the cold air entering the first heat dissipation notch 211 to the axial flow fan 6, so that when the axial flow fan 6 is working, the cold air entering from the first heat dissipation notch 211 must flow. over the surface of the power module 5. Certainly, the number of the first cooling slots 211 may also be multiple. For example, in one embodiment, one or more first cooling notches 211 are disposed on the bottom plate 21 near the peripheral edge of the power module 5 .

In one embodiment, the bottom of the base 2 is further provided with supporting feet, and the supporting feet make it easier for the first cooling slot 211 on the bottom plate 21 to absorb cold air from the outside.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A hot-blast circulation device, comprising a hot-blast cover, a hot-blast rear plate forming a hot-blast air passage together with the hot-blast cover, an electric heating tube arranged in the hot-blast air passage and a motor for driving blades to rotate, and the motor is fixed on the hot-blast rear plate Outer side; characterized by: The front end face of the hot air cover is provided with an air inlet area and a plurality of air outlet areas are arranged at intervals around the air inlet area, and a plurality of air inlet holes are distributed in the air inlet area at intervals, each of the air outlet areas A plurality of air outlet holes are distributed at intervals in the interior, and the air inlet holes and the air outlet holes are axially connected to the hot air duct; At least one air guide device is provided in the hot air duct for preventing the air in the hot air duct from eddy currents during the rotation of the blades and guiding the air flow of the blades to the wind outlet area. 2. The hot air circulation device according to claim 1, characterized in that: the air guide device is an L-shaped air guide baffle, the first end of the air guide plate is fixed on the hot air rear plate or the hot air cover, and the air guide The second end of the guide plate is located on the flow path of the airflow generated when the blades rotate in the hot air duct. 3 . The hot air circulation device according to claim 2 , wherein the number of guide baffles is at least two, and each guide baffle is staggered and arranged in the hot air duct. 4 . 4. The hot air circulation device according to claim 1, characterized in that: the electric heating pipe is extended and laid along the direction of the hot air duct and partially arranged as a curved part for increasing the heat dissipation area and blocking the flow of air in the hot air duct. 5. The hot air circulation device according to claim 1, characterized in that: the air inlet area is set at the central position of the front end of the hot air hood, and the air outlet area surrounds the air inlet area and is arranged at the upper left corner, upper right corner, and lower left of the front end of the hot air hood corner and bottom right corner position. 6. An oven, comprising at least an oven body with a baking cavity, characterized in that: one side plate of the oven body is provided with the hot air circulation device as claimed in any one of claims 1-5. 7. The oven according to claim 6, wherein a pedestal is provided under the oven body, the pedestal includes a bottom plate with a first cooling notch and side plates surrounding the edges of the bottom plate, and the base and There is an accommodation space between the oven body, and a power module is arranged in the accommodation space; the rear cover plate of the hot air circulation device is arranged on the outer side of the oven body, and there is a heat dissipation space between the rear cover plate and the hot air circulation device, and the hot air circulation The motor of the device is located in the heat dissipation space, and the rear cover has several second heat dissipation slots. 8 . The oven according to claim 7 , wherein an axial flow fan is provided on one of the side plates of the base, and the air inlet and air outlet of the axial flow fan communicate with the accommodation space and the heat dissipation space respectively. 9. The oven according to claim 6, characterized in that: the baking cavity is installed with a sink through a detachable structure. 10. The oven according to claim 9, characterized in that: the upper left corner, the lower left corner, the upper right corner or/and the lower right corner of the front face of the hot air hood is provided with an air outlet area, and the water tank is close to the upper left of the hot air hood Corner, lower left corner, upper right corner or lower right corner of the air outlet area; or, the upper left corner, lower left corner, upper right corner, and lower right corner of the front face of the hot air cover are respectively provided with an air outlet area, and the two ends of the water tank are respectively It is arranged close to one of the air outlet areas so that the water tank is located at the upper middle part, the lower end middle part, the left middle part or the right middle part of the front face of the hot air cover.