CN108771489B - Efficient heat dissipation electric cooking appliance - Google Patents
Efficient heat dissipation electric cooking appliance Download PDFInfo
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- CN108771489B CN108771489B CN201810927165.1A CN201810927165A CN108771489B CN 108771489 B CN108771489 B CN 108771489B CN 201810927165 A CN201810927165 A CN 201810927165A CN 108771489 B CN108771489 B CN 108771489B
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- 238000010411 cooking Methods 0.000 title claims abstract description 34
- 230000017525 heat dissipation Effects 0.000 title abstract description 41
- 235000013305 food Nutrition 0.000 claims abstract description 92
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000002360 preparation method Methods 0.000 claims abstract description 45
- 230000001939 inductive effect Effects 0.000 claims abstract description 30
- 239000011229 interlayer Substances 0.000 claims abstract description 26
- 238000007664 blowing Methods 0.000 claims description 18
- 238000005485 electric heating Methods 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 10
- 230000008093 supporting effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000001976 improved effect Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 235000012020 french fries Nutrition 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 235000021058 soft food Nutrition 0.000 description 2
- 241000287828 Gallus gallus Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
- A47J37/0641—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements with forced air circulation, e.g. air fryers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0664—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Baking, Grill, Roasting (AREA)
Abstract
The invention provides an electric cooking appliance with high-efficiency heat dissipation, which comprises a shell, a food preparation chamber arranged in the shell and a heating device arranged in the food preparation chamber, wherein: the shell comprises an upper shell, a lower shell and a lining plate arranged between the upper shell and the lower shell; the food making chamber is arranged in the lower shell and is provided with a side wall, an air interlayer is formed between the lower shell and the side wall, the lining plate is arranged at the top of the air interlayer, the lower shell is provided with a lower air inlet and a lower air outlet, and air flows into the air interlayer from the lower air inlet and flows out from the lower air outlet; the upper part of the food making chamber is covered with a blast cover, the heating device is arranged in the blast cover, and an accommodating space is formed among the lining plate, the upper shell and the blast cover; the upper shell is provided with an upper air inlet and an upper air outlet, the accommodating space is provided with an air inducing device, and the air inducing device forces air to flow into the accommodating space from the upper air inlet and flow out from the upper air outlet. The invention adopts a sectional heat dissipation mode to discharge harmful heat, and has simple structure and good heat dissipation effect.
Description
Technical Field
The invention belongs to the field of intelligent household appliance manufacturing, and particularly relates to an electric cooking appliance capable of efficiently radiating heat.
Background
In the process of preparing food by adopting high-temperature air flow, the high-temperature air flow carries a large amount of heat, and the heat is transferred to the food through contact with the surface of the food to finish cooking of the food; however, during circulation of the high temperature air flow in the food preparation chamber, the temperature of the outer wall around the food preparation chamber is increased, and as time increases, part of the heat is transferred to the housing by the outer wall, so that the temperature of the housing is raised, and at this time, the heat transferred to the housing needs to be discharged.
On the other hand, the generation of high-temperature air flow is based on electrical components, such as a motor, and electronic components such as a control circuit board and a display screen are also arranged in the equipment, so that heat is generated in the working process of the electrical components, and the heat needs to be discharged in time; the heat dissipation mode of the motor mainly comprises natural cooling, cooling by a heat dissipation fan, forced air cooling and the like, and the natural air cooling cannot meet the heat dissipation requirement because the motor with higher power is required for generating high-temperature air flow; the air oven equipment is limited by a space structure, and a motor with a cooling fan cannot be adopted, so that the cooling effect of the air oven equipment cannot meet the requirements even though the air oven equipment can structurally adopt the motor with the cooling fan; therefore, the air oven mostly adopts a forced air cooling mode, flowing cold air is formed in the shell, and high-temperature gas in the shell is brought out.
For example, chinese patent application 201610408690.3 discloses an air fryer with external cold air circulation, comprising a casing, an upper core, a lower core, an air duct plate, a temperature controller, a pan basket, a motor, a cold air wind wheel, a hot air wind wheel, a heating body, an air inlet and a plurality of air outlets, wherein the cold air wind wheel is arranged in an interlayer between the casing and the upper core corresponding to the air inlet and is nearer to the air inlet; the heating body comprises a heating element, a fixing piece, a supporting frame and a linking bracket, and the heating element is exposed and directly added with air; the temperature controller adopts an adjustable flash temperature controller to directly sense the temperature of the internal heating air; the container for containing food adopts a composite pot with a pot basket and a pot basket layer frame, and a cavity is formed at the bottom of the food. In the technical scheme, the cold air wind wheel is arranged above the motor and is particularly positioned between the motor and the air inlet, cold air introduced from the outside of the shell body by the air inducing wind wheel mainly acts between the shell body and the food cavity, heat transferred to the shell body part by the food cavity is driven downwards and is discharged through the air outlet at the bottom, and the defect is that cold air introduced into the shell body by the cold air wind wheel does not directly act on the motor, heat generated by the operation of the motor is accumulated, so that the motor is overhigh in temperature and damaged; in addition, cold air directly acts on the outer wall of cavity, produces the cold air that has great velocity of flow at the outer wall, will follow the cavity in and pass through the cold air to the heat direct discharge of its outer wall, although solved harmful thermal residual problem, can take away more useful heat, the difference in temperature is too high inside and outside the cavity, lead to some useful heat direct transfer to the outer wall of cavity, and then be taken out, cause the waste of heat, and then increase the cooking time of food, along with cooking time's increase, can influence the taste of food, especially food such as french fries, long-time heating can lead to sponginess, feel very poor.
Based on this, the applicant proposes an electric cooking appliance with efficient heat dissipation, which adopts a sectional heat dissipation manner to exhaust the harmful heat inside the housing.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an electric cooking appliance with high-efficiency heat dissipation, which discharges harmful heat in a sectional heat dissipation mode.
In order to achieve the above object, the present invention provides an electric cooking appliance with efficient heat dissipation, comprising a housing, a food preparation chamber provided in the housing, and a heating device provided in the food preparation chamber, wherein:
the shell comprises an upper shell, a lower shell and a lining plate arranged between the upper shell and the lower shell;
the food making chamber is arranged in the lower shell and is provided with a side wall, an air interlayer is formed between the lower shell and the side wall, the lining plate is arranged at the top of the air interlayer, the lower shell is provided with a lower air inlet and a lower air outlet, and air flows into the air interlayer from the lower air inlet and flows out from the lower air outlet;
the upper part of the food making chamber is covered with a blast cover, the heating device is arranged in the blast cover, and an accommodating space is formed among the lining plate, the upper shell and the blast cover; the upper shell is provided with an upper air inlet and an upper air outlet, the accommodating space is provided with an air inducing device, and the air inducing device forces air to flow into the accommodating space from the upper air inlet and flow out from the upper air outlet.
According to the scheme, the heat dissipation of the shell around the food preparation chamber and the heat dissipation of the accommodating space above the food preparation chamber (and the device arranged in the accommodating space) are respectively completed in a sectional heat dissipation mode;
on the one hand, the outside air flows into the accommodating space from the upper air inlet of the upper shell, flows out from the upper air outlet under the driving of the induced air device, and forms active heat dissipation air flow between the upper air inlet and the upper air outlet, wherein the active heat dissipation air flow is a heat dissipation air flow which is started along with the opening of the appliance, has a certain output flow, needs to be generated by external driving, can form a faster flow speed and is used in the whole course in most cases. The harmful heat generated in the accommodating space (and the device arranged in the accommodating space) is discharged out of the shell through continuously supplementing cold air from the outside.
On the other hand, the outside air flows into the air interlayer from the lower air inlet of the lower shell, and as the temperature of the air interlayer rises, thermal molecules generate diffusion motion, and the air in the air interlayer flows out from the lower air outlet, so that natural heat dissipation air flow is formed between the lower air inlet and the lower air outlet, wherein the natural heat dissipation air flow is a heat dissipation air flow which is gradually generated along with the opening of an appliance, has no fixed output flow, is changed depending on the temperature rising degree of a food preparation chamber, does not need extra power to drive, has a small flow speed or has a flow speed which is near invisible, and has the output flow which is near stable along with the use time of the appliance. Through constantly mending cold wind to the air intermediate layer from the external world, with the air that contains higher heat in the air intermediate layer carry out the heat exchange, discharge to the outside of casing from lower air outlet.
It should be noted that, the lower air outlet is only arranged on the lower shell and above the lower air inlet, the specific position of the lower air outlet can be lower than the upper air outlet, can be equal to the upper air outlet, can be higher than the upper air outlet, and has no direct position relationship. Preferably, in order to improve the standardization and modularization of the product, the position of the lower air outlet is lower than that of the upper air outlet.
According to another embodiment of the invention, a preferred heating device comprises a blowing wind wheel and an electric heating tube arranged right below the blowing wind wheel, wherein the blowing wind wheel is used for generating flowing air flow, and the electric heating tube is used for heating the air flow generated by the blowing wind wheel to form heating air flow; the heating air flows circularly inside the food preparation chamber and continuously flows from the surface of the food to complete the heating process of the food.
Further, the blast cover comprises an upper air duct plate and a lower air duct plate, wherein the lower air duct plate is arranged on the outer side below the upper air duct plate, a connecting plate extending towards the outer side of the periphery of the lower air duct plate is arranged at the bottom of the lower air duct plate, and the connecting plate is connected with the top of the side wall. Wherein, the upper air duct plate is arranged outside the blast wind wheel, and the lower air duct plate is arranged outside the electric heating pipe. The heated air flow formed by the blast wind wheel in the scheme is not vertically downward air flow along the side wall of the food preparation chamber, is cyclone air flow with included angles with the horizontal plane and the vertical plane, and is blown to the side wall of the food preparation chamber in a relatively inclined mode. In order to better promote the uniformity of heating the food and improve the texture and taste of the food, the side wall of the food preparation chamber is provided with an airflow guiding device, such as a cambered surface bulge and the like, a small amount of heating airflow changes the flowing direction of the heating airflow after passing through the airflow guiding device and is scattered to the surface of the food, and a large amount of heating airflow directly flows towards the surface of the food along the original flowing path (namely the flowing path formed by the heating airflow along the side wall of the food preparation chamber) to continuously heat the food.
According to another specific embodiment of the invention, the air inducing device preferably comprises an air inducing cover, an air inducing wind wheel and a motor, wherein the air inducing wind wheel and the motor are arranged in the air inducing cover, the air inducing cover is arranged right above the air blowing cover, the air inducing opening is arranged at the top of the air inducing cover, and the motor is arranged on the outer side above the air inducing opening and drives the air inducing wind wheel and the air blowing wind wheel to synchronously rotate. Specifically, the area covered by the induced draft cover is smaller than the area covered by the air draft cover, but larger than the area covered by the induced draft opening, and the diameter of the induced draft wind wheel is also smaller than the diameter of the air draft wind wheel, wherein the projection area of the induced draft opening on the horizontal plane is larger than the projection area of the motor on the horizontal plane.
In order to accelerate the flow rate of active heat dissipation air flow, the induced air cover is provided with a contour curved surface which is arranged along the circumferential direction of the induced air wind wheel and forces air in the induced air cover to flow along the rotation direction of the induced air wind wheel, one example of the induced air cover is a spiral contour curved surface, and the contour curved surface is arranged to further generate stable air flow which flows according to a certain rule and has a higher flow rate in the induced air cover so as to realize that harmful heat (harmful heat, particularly heat for heating food in the food manufacturing process) in the accommodating space is rapidly discharged to the outside of the appliance.
Wherein the projection of the profile curved surface horizontal plane of the induced draft wind wheel is 1.05 to 1.3 times, such as 1.2 times, of the projection of the induced draft wind wheel on the horizontal plane so as to accelerate the rapid flow and discharge of the gas along the profile curved surface.
According to another specific embodiment of the invention, the accommodating space is provided with a first chamber and a second chamber which are mutually independent and communicated, and the first chamber and the second chamber are mutually communicated through ventilation holes; the first chamber is used for placing electronic devices, and the second chamber is used for placing the air inducing device. Specifically, part of air flowing in from the upper air inlet directly flows into the second chamber to cool the motor and flows into the air inducing cover; part of the air flowing in from the upper air inlet flows into the first chamber and flows into the second chamber through the air holes; because the relative heat that the motor produced is more, and the temperature around the motor is higher, and the heat in electron components and parts field is lower relatively, through setting up two cavities that separate each other but communicate, can effectually avoid the heat drunkenness that the motor produced to the position of electron components and parts, and the air that flows to first cavity can continue to flow to the second cavity after accomplishing the cooling to electron components and parts, can continue to converge to the air that directly gets into the second cavity, accomplish the cooling to the motor.
In order to promote the gas to form a stable flow direction according to a certain rule and to have a flow proportion close to balance, the upper air inlet is provided with a guide structure, and the guide structure specifically comprises a plurality of communication grooves communicated with the first chamber, and the gas flowing into the accommodating space from the upper air inlet can be controlled to flow to the first chamber according to a certain component by controlling the flow area of the communication grooves so as to cool electronic components.
According to a further embodiment of the invention, a top cover is provided at the top of the upper housing, and the upper air inlet has a continuous air inlet area provided along a part of the edge of the top cover, into which air enters in a horizontal flow direction. In order to reduce the resistance of the air inflow, the upper air inlet has a continuous air inlet area in the height direction, and an anti-pollution structure is provided at the upper air inlet to prevent moisture or suspended matters from entering the interior of the appliance, specifically, for example, the upper air inlet is not an air inlet structure along only one direction, and after the air flows in the horizontal direction, the air can change the flowing direction along the top cover or the contact part of the upper shell and the top cover, for example, the air flows downwards, so as to enter the accommodating space.
According to a further embodiment of the invention, the lower housing has a bottom wall, the lower air inlet is provided on the bottom wall and is recessed inwardly along the lower surface of the bottom wall, and air enters the lower air inlet in a vertical flow direction. Specifically, the number of the lower air inlets is multiple, for example, the lower air inlets adopt a square hole structure, in order to promote the smoothness of the air inlet of the lower air inlets, preferably, the bottom wall is provided with a supporting device protruding out of the bottom wall, a gap is arranged between the lower air inlets and a supporting surface of the supporting device, air passes through the gap to flow into the hole and flows into the air interlayer, and the supporting device is arranged on supporting legs at four corners of the bottom wall.
In the invention, the gas discharge phenomenon in the air interlayer is a diffusion phenomenon after the temperature of the gas is raised based on a certain volume which can contain the gas in the air interlayer, and the gas is not dependent on a certain power of the outside, thus being a natural diffusion process. In order to ensure that the gas discharged from the lower air outlet does not cause obvious loss of heat of the food preparation chamber or excessively high temperature of the discharged gas (namely, within a reasonable range), a plurality of lower air outlets, such as three, are arranged on the side wall of the lower shell, preferably, the lower air outlets are arranged at the same height, and grid plates are arranged at the lower air outlets to guide smooth discharge of the gas.
In the invention, the water vapor outlet is arranged on the air outlet side of the air blowing wind wheel in the food preparation chamber and is used for discharging redundant water vapor (high-temperature gas is discharged and the redundant water vapor is carried out) in the food preparation process, thereby avoiding the phenomena of soft food surface and the like caused by the rising of air pressure and the condensation of the water vapor in the food preparation chamber in the process of heating air flow to bake the food; preferably, the water vapor outlet is arranged at the air outlet of the induced draft hood and is arranged right below the air outlet, specifically, air discharged from the air outlet of the induced draft hood and the water vapor outlet is equalized to the upper air outlet, and a grid outer cover which completely covers the upper air outlet is arranged on the upper shell to guide the air to flow out.
Compared with the prior art, the invention has the following advantages:
1. the heat dissipation of the shell around the food preparation chamber and the heat dissipation of the accommodating space above the food preparation chamber are respectively completed in a sectional heat dissipation mode, so that the heat dissipation effect is obvious;
2. the heat dissipation effect is good, the heat utilization rate is improved in the process of discharging harmful heat, and particularly, the heat discharge in the food manufacturing chamber is limited, so that the time for manufacturing the food is reduced;
3. the flow speed of the heating air flow generated by the hot air flow generating device is high, so that the heat utilization efficiency of the heating air flow is improved; the temperature in the food manufacturing chamber is balanced, the baking degree of the manufactured food is uniform, and the whole texture and taste of the food are improved.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
For a clearer understanding of other features and advantages of the present invention, embodiments of the invention will be described by way of example and not limitation, and the accompanying drawings in which:
fig. 1 is a schematic view of embodiment 1 of an electric cooking appliance of the present invention;
fig. 2 is a schematic view of embodiment 2 of the electric cooking appliance of the present invention;
fig. 3 is a schematic view showing the overall structure of embodiment 3 of the electric cooking appliance of the present invention;
fig. 4 is a cross-sectional view of embodiment 3 of the electric cooking appliance of the present invention;
fig. 5 is a schematic structural view of an upper air inlet of embodiment 3 of the electric cooking appliance according to the present invention;
fig. 6 is a schematic structural view of an upper case of embodiment 3 of the electric cooking appliance of the present invention;
fig. 7 is a schematic structural view of a blower housing of embodiment 3 of the electric cooking appliance of the present invention;
fig. 8 is a schematic structural view of a hood of embodiment 3 of the electric cooking appliance according to the present invention;
fig. 9 is a schematic diagram of a hood of embodiment 3 of the electric cooking appliance according to the present invention;
fig. 10 is a schematic view of the structure of the lower air inlet of embodiment 3 of the electric cooking appliance according to the present invention;
FIG. 11 is a schematic view showing the structure of a basket of embodiment 3 of the electric cooking appliance according to the present invention;
fig. 12 is a schematic structural view of a collecting device of embodiment 3 of the electric cooking appliance of the present invention;
fig. 13 is a schematic structural view of a carrying device of embodiment 4 of the electric cooking appliance of the present invention;
fig. 14 is a schematic structural view of a collecting device of embodiment 5 of the electric cooking appliance of the present invention.
Detailed Description
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "upstream", "downstream", "air-out side", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate or imply that the devices or features to be referred to must have a specific direction, be constructed and operated in a specific direction, and it should be construed broadly by those skilled in the art that the above terms should not be construed as limiting the present invention.
Example 1
The embodiment provides an electric cooking appliance with high heat dissipation, as shown in fig. 1, which comprises a shell 1, a food preparation chamber 2, a heating device 3 and an induced air device 4.
Wherein, the shell 1 includes upper shell 11, lower shell 12 and establishes the welt 13 between upper shell 11 and lower shell 12, and wherein, welt 13 keeps apart between upper shell 11 and the lower shell 12, near or not exchange, circulation at all between the gas between upper shell 11 and the lower shell 12.
The food preparation chamber 2 is arranged in the lower shell 12, the air blowing cover 21 is covered above the food preparation chamber 2, the heating device 3 is arranged in the air blowing cover 21, the heating device 3 comprises an air blowing wind wheel 31 and an electric heating pipe 32, the electric heating pipe 32 is arranged right below the air blowing wind wheel 31, the air blowing wind wheel 31 is used for generating flowing air flow, and the electric heating pipe 32 is used for heating the air flow generated by the air blowing wind wheel 31 to form heating air flow; the heating air flows circularly inside the food preparation chamber 2 and continuously flows from the surface of the food to complete the heating process of the food.
The food preparation chamber 2 has a side wall 22, an air interlayer 23 is formed between the lower housing 12 and the side wall 22, a liner 13 is provided on top of the air interlayer 23, the lower housing 12 has a lower air inlet 14 and a lower air outlet 15, air flows into the air interlayer 23 from the lower air inlet 14 and flows out from the lower air outlet 15, a natural heat dissipation air flow w1 is formed between the lower air inlet 14 and the lower air outlet 15, and after heat exchange is performed between the natural heat dissipation air flow w1 and air containing higher heat in the air interlayer 23, the air is discharged to the outside of the lower housing 12 from the lower air outlet 15.
An accommodating space 24 is formed among the upper shell 11, the lining plate 13 and the blast cover 21, and the induced draft device 4 is arranged in the accommodating space 24; the induced draft device 4 comprises an induced draft hood 41, an induced draft wind wheel 42 and a motor 43, wherein the induced draft hood 41 is arranged in the shell 1 and right above the food preparation chamber 2, the top of the induced draft hood 41 is provided with an induced draft opening 44, and one side of the induced draft hood 41 is provided with an air outlet 45; the induced draft wind wheel 42 is arranged in the induced draft hood 41, the motor 43 is arranged above the outer side of the induced draft hood 41 through a motor seat, and preferably, the projection of the induced draft opening 44 on the horizontal plane is close to or completely covers the projection of the motor 43 on the horizontal plane, so that air can better enter the induced draft hood 41; the induced draft wind wheel 42 and the blast wind wheel 21 are coaxially arranged and driven by a motor 43, and synchronously rotate.
The upper case 11 has an upper air inlet 16 and an upper air outlet 17, and under the action of the induced draft device 4, external air flows into the accommodating space 24 from the upper air inlet 16 and flows out from the upper air outlet 17, an active heat dissipation air flow w2 is formed between the upper air inlet 16 and the upper air outlet 17, and the active heat dissipation air flow w2 discharges harmful heat generated by the accommodating space 24 to the outside of the upper case 11 through the discharge port 45 of the induced draft cover 41.
Example 2
The difference between this embodiment and embodiment 1 is that, as shown in fig. 2, the blower cover 21 of the food preparation chamber is provided with a vapor outlet 25, and the vapor outlet 25 is used for discharging the excessive vapor in the food preparation process, so as to avoid the phenomena of air pressure rise, vapor condensation, soft food surface, etc. in the process of heating air flow to bake food; wherein the water vapor outlet 25 is provided at the air outlet side of the blower housing 21. A partition plate 26 is arranged between the vapor outlet 25 and the air outlet 45 of the air inducing cover 41, the upper air outlet completely covers the vapor outlet 25 and the air outlet 45, and two air streams are respectively discharged from the upper air outlet 17, and preferably, a grid cover 27 embedded in the upper shell is arranged at the position of the upper air outlet.
Example 3
The embodiment provides an electric cooking appliance, as shown in fig. 3-12, which adopts a sectional heat dissipation structure to dissipate heat, and specifically comprises a shell 5, a food making chamber 6, a heating device 7, an induced air device 8 and a bearing device 9.
The housing 5 has a vertical structure, and specifically includes an upper housing 51, a lower housing 52, and a liner 53, where the liner 53 is disposed between the upper housing 51 and the lower housing 52, separates the upper housing 51 from the lower housing 52, and allows gas between the upper housing 51 and the lower housing 52 to be exchanged or not exchanged at all.
The food preparation chamber 6 is arranged in the lower shell 52, the air blast cover 61 is covered above the food preparation chamber 6, the heating device 7 is arranged in the air blast cover 61, the heating device 7 comprises an air blast wind wheel 71 and an electric heating pipe 72, the electric heating pipe 72 is arranged right below the air blast wind wheel 71, the air blast wind wheel 71 is used for generating flowing air flow, and the electric heating pipe 72 is used for heating the air flow generated by the air blast wind wheel 71 to form heating air flow; the heating air flow circulates inside the food preparation chamber 6, continuously from the surface of the food, to complete the heating process of the food.
Specifically, the blower housing 61 is structured as shown in fig. 7, and includes an upper duct plate 611 and a lower duct plate 612, the lower duct plate 612 being provided on the lower outer side of the upper duct plate 611, and a connection plate 613 extending toward the outer side in the circumferential direction thereof being provided at the bottom of the lower duct plate 612, the food preparation chamber 6 having a side wall 62, the connection plate 613 being connected to the top of the side wall 62. Wherein the upper duct plate 611 is disposed outside the blower wind wheel 71, and the lower duct plate 612 is disposed outside the electric heating pipe 72.
The induced draft device 8 comprises an induced draft hood 81, a motor 82 arranged above the outer side of the induced draft hood 81 and an induced draft wind wheel 83 arranged inside the induced draft hood 81, wherein the induced draft hood 81 is arranged inside the shell 5 and above the outer side of the food preparation chamber 6, an induced draft opening 84 is arranged at the top of the induced draft hood 81, the motor 82 is arranged above the induced draft opening 84 through a motor seat for example, and the projection of the induced draft opening 84 on the horizontal plane completely covers the projection of the motor 82 on the horizontal plane, so that air can better enter the inside of the induced draft hood 81; specifically, the blower wind wheel 71 and the induced air wind wheel 83 are both arranged at the output end of the motor 82, and the motor 82 drives the blower wind wheel 71 and the induced air wind wheel 83 to synchronously rotate.
In order to further improve the flow rate of the active heat dissipation airflow, the induced draft cover 81 is provided with a profile curved surface 85 which is arranged along the circumferential direction of the induced draft wind wheel 83 and drives the air in the induced draft cover 81 to flow along the rotation direction of the induced draft wind wheel 83, the structure of the induced draft cover 81 is shown in fig. 8, wherein the flow direction of the air in the induced draft cover 81 is shown by an arrow in fig. 9, the profile curved surface 85 is formed by extending a spiral line in a horizontal plane along a perpendicular bisector, the profile curved surface 85 is arranged, the forced ventilation effect can be provided, the induced draft efficiency is improved on the premise that the structure (power) of the induced draft wind wheel 83 is not changed, the wind speed of the cold air flowing through the surface of the motor 82 is further improved, the cold air flowing through the surface of the motor 82 is formed into a stable airflow with a relatively high flow rate according to a certain rule, and the heat generated by the motor 82 is further rapidly taken away.
Further, in order to better introduce air into the induced draft hood 81, the projected area of the induced draft wind wheel 83 on the horizontal plane is 1.2 to 1.6 times that of the induced draft port 84, and the projected area of the induced draft wind wheel 83 in the present embodiment on the horizontal plane is 1.3 times that of the induced draft port 84 on the horizontal plane.
The heat dissipation structure and process in the upper housing 51 are specifically:
the upper housing 51 of the present embodiment is provided with an upper air inlet 55 and an upper air outlet 56 (the air intake cover 81 has an air outlet 86, the air outlet 86 directly discharges the air of the air intake cover 81 through the upper air outlet 56), and an accommodating space 54 is formed among the liner plate 53, the upper housing 51 and the air blast cover 61; under the action of the induced air device 8, external air flows into the accommodating space 54 from the upper air inlet 55 and flows out from the upper air outlet 56, so that active heat dissipation air flow is formed.
Wherein the upper intake vent 55 is configured as shown in fig. 5, wherein 5a represents the top cover portion and 5b represents the upper housing portion; specifically, the top of the upper casing 51 is provided with a top cover 59, the upper air inlet 55 has a continuous air inlet area along part of the edge of the top cover 59, and air enters the upper air inlet 55 in a horizontal flow direction, wherein the top cover 59 and the upper casing 51 are arranged in a buckling connection manner, for example, the top cover 59 is provided with a plurality of clamping pieces with conical surfaces, and the upper casing is provided with grooves matched with the clamping pieces; the gas flows into the inside of the upper case 51 through the edge of the top cover 59 and changes direction along a part of the edge of the upper case 51 to flow downward, into the accommodation space 54.
More specifically, the upper case 51 is provided with a partition plate 511 inside, and as shown in fig. 6, the partition plate 511 has a first chamber 541 and a second chamber 542 that are independent and penetrating each other in the accommodation space 54, and ventilation holes 512 are provided in the partition plate 511, and the first chamber 541 and the second chamber 542 are communicated with each other through the ventilation holes 512; wherein the first chamber 541 is for placing electronic devices and the second chamber 542 is for placing the air inducing means 8. The air entering the accommodating space 54 from the upper air inlet 55 is divided into two parts, one part directly flows into the second chamber 542, and the air flowing through the surface of the motor 82 is led into the air guiding cover 81, so that heat dissipation of the motor 82 is completed; the other part firstly enters the second chamber 542 to dissipate heat of the electronic device, then enters the second chamber 542 through the air holes 512 to be combined with the air in the second chamber 542, and flows through the surface of the motor 82 to be led into the air guiding cover 81.
The heat dissipation structure and process of the lower housing 52 are specifically:
the food preparation chamber 6 has a side wall 62, an air interlayer 63 is formed between the lower housing 52 and the side wall 62, a liner 53 is provided on top of the air interlayer 63, the lower housing 52 has a lower air inlet 57 and a lower air outlet 58, air flows into the air interlayer 63 from the lower air inlet 57 and flows out from the lower air outlet 58, natural heat dissipation air flow is formed between the lower air inlet 57 and the lower air outlet 58, and after heat exchange is performed between the natural heat dissipation air flow and air containing higher heat in the air interlayer 63, the air is discharged to the outside of the housing from the lower air outlet 58.
As shown in fig. 10, the lower air inlet 57 has a bottom wall 521 of the lower case 52, and the lower air inlet 57 specifically includes a plurality of square holes 571 extending along the outer side of the bottom wall 521 toward the inside thereof, the plurality of square holes 571 being uniformly distributed on the bottom wall 521; preferably, a wind shield 572 is provided on the bottom wall 521, the wind shield 572 is provided above the plurality of square holes 571 of the lower air inlet 57, and the projection of the wind shield 572 on the horizontal plane completely covers the lower air inlet 57; more preferably, two recesses 573 are provided in the bottom wall 521 for lifting the entire appliance, the two recesses 573 being provided on opposite sides of the bottom wall 521; the bottom wall 521 is provided with a supporting leg 522 protruding out of the bottom wall 521, and a gap is provided between the lower air inlet 57 and the supporting surface of the supporting leg 522, so as to improve the air inlet smoothness of the lower air inlet 57, and the air passes through the gap, is converged into the space between the square hole 571 and the bottom of the food-making chamber 6, and flows into the air interlayer 63.
The lower air outlet 58 is disposed at a position of the lower housing 52 near the top of the air interlayer 63, so that the air discharged from the lower air outlet 58 will not cause significant loss of heat of the food making chamber 6, nor will the temperature of the discharged air be too high (i.e. within a reasonable range), in this embodiment, a plurality of lower air outlets 58, specifically, for example, four lower air outlets 58 are disposed at the same height in the lower housing 52, and a grid plate is disposed at the lower air outlet 58 to guide smooth discharge of the air.
In this embodiment, a detachable door assembly 523 is disposed on the lower housing 52, a transparent glass window is disposed on the door assembly 523, and a light emitting body, such as an electronic lamp, is disposed in the food preparation chamber 6, so that a user can observe the cooking state of food in the food preparation chamber 6 directly through the glass window; specifically, the bottom of the door assembly 523 is rotatably coupled to the lower housing 52 using a rotation shaft, and the door assembly 523 may be removed from the lower housing 52 when the door assembly 523 is rotated to a predetermined angle, for example, approximately at an inclination angle of 30 ° from the vertical.
The carrying device 9 is arranged in the food preparation chamber 6 in the embodiment, the carrying device 9 comprises a multi-layer basket structure 91 which can be taken out from the food preparation chamber 6, the basket structure 91 is shown in fig. 11, a plurality of carrying ribs 92 for carrying the basket structure are arranged in the side wall 62 of the food preparation chamber 6, wherein the carrying ribs 92 are oppositely arranged on the two side walls 62 in pairs, in the embodiment, the three-layer basket structure 91 is specifically arranged, the basket structure 91 is provided with a frame 911 and a basket body 912 which is sunken downwards along the frame 911, and the upper surfaces of the carrying ribs 92 are contacted with the frame 911 and support the frame 911. Preferably, the upper surface of the carrying ribs 92 has a carrying surface inclined toward the fry basket structure 92; wherein, the mode of the multilayer frying basket 91 is suitable for the preparation process of meat food such as chicken wings, and laid food can be well contacted with the heating air flow and uniformly heated by the heating air flow.
For convenient cleaning and collecting of the remaining material, a collecting device 64 is provided at the bottom of the food preparation chamber 6, for example, a drip tray structure which can be freely taken out from the food preparation chamber 6, as shown in fig. 12, wherein the collecting device 64 is provided with a convex portion 641 arranged along the center thereof and extending upward, specifically, the convex portion 641 may be adapted to a quadrangular structure of the food preparation chamber 6, or may be a triangular or rectangular structure having a plurality of gradually extending surfaces, and the convex portion 641 may be on the flow path of the heating air flow to guide the heating air flow to flow more rapidly and uniformly toward the food.
Example 4
The difference between this embodiment and embodiment 3 is that, as shown in fig. 13, the carrying device 9 includes a rotating cage 94, a rotating cage fixing frame 95, and a driving device 96 for driving the rotating cage 94 to rotate, the rotating cage 94 has a cage 941 for placing food and a rotating shaft 942 connected to the cage 941, one end of the rotating shaft 942 is connected to the driving device 96, and the other end is disposed on the rotating cage fixing frame 95. Further, a sliding rail 951 disposed along a placement direction of the rotating cage 94 and a placement groove 952 disposed at an end of the sliding rail 951 are disposed on the rotating cage fixing frame 95, and the placement groove 952 is used for rotatably supporting the rotating shaft 942. The manner of the rotating cage 94 is very suitable for making food such as French fries, potato blocks and the like, and the rotating cage 94 can be turned over to stir the food well, so that the food can be heated more uniformly.
Example 5
The present embodiment is different from embodiment 3 in that, as shown in fig. 14, the collecting device 64 is provided with a plurality of rectangular pyramid-shaped protrusions 642, and the protrusions 641 can guide the flow of the heating air toward the food more rapidly and uniformly on the flow path of the heating air.
While the invention has been described in terms of preferred embodiments, it is not intended to limit the scope of the invention. Those skilled in the art will recognize that many modifications may be made without departing from the scope of the invention, and that it is intended to cover all modifications as fall within the scope of the invention.
Claims (7)
1. The utility model provides a high-efficient radiating electric cooking utensil, includes the casing, establishes food preparation room in the casing and establish heating device in the food preparation is indoor, its characterized in that:
the shell comprises an upper shell, a lower shell and a lining plate arranged between the upper shell and the lower shell;
the food making chamber is arranged in the lower shell and is provided with a side wall, an air interlayer is formed between the lower shell and the side wall, the lining plate is arranged at the top of the air interlayer, the lower shell is provided with a lower air inlet and a lower air outlet, and air flows into the air interlayer from the lower air inlet and flows out from the lower air outlet;
the upper part of the food making chamber is covered with a blast cover, the heating device is arranged in the blast cover, and an accommodating space is formed among the lining plate, the upper shell and the blast cover; the upper shell is provided with an upper air inlet and an upper air outlet, the accommodating space is provided with an air inducing device, and the air inducing device forces air to flow into the accommodating space from the upper air inlet and flow out from the upper air outlet;
the air inducing device comprises an air inducing cover, an air inducing wind wheel and a motor, wherein the air inducing wind wheel is arranged in the air inducing cover, the air inducing cover is arranged right above the air blowing cover, an air inducing opening is arranged at the top of the air inducing cover, and the motor is arranged on the outer side above the air inducing opening; the induced draft hood is provided with a contour curved surface which is arranged along the circumferential direction of the induced draft wind wheel and forces air in the induced draft hood to flow along the rotation direction of the induced draft wind wheel, and the contour curved surface is formed by extending along a perpendicular line based on a spiral line in a horizontal plane;
the accommodating space is provided with a first chamber and a second chamber which are mutually independent and communicated, and the first chamber and the second chamber are mutually communicated through ventilation holes; the first chamber is used for placing electronic devices, and the second chamber is used for placing the induced air device; part of the air flowing in from the upper air inlet directly flows into the second chamber, cools the motor and flows into the air guiding cover; part of the air flowing from the upper air inlet flows into the first chamber and flows into the second chamber through the air holes.
2. The electric cooking appliance of claim 1, wherein a top cover is provided at a top of the upper housing, the upper air inlet having a continuous air inlet area provided along a portion of an edge of the top cover, and air is introduced into the upper air inlet in a horizontal flow direction.
3. The electric cooking appliance of claim 1, wherein the lower housing has a bottom wall, the lower air inlet is provided on the bottom wall and is recessed inward along a lower surface of the bottom wall, and air enters the lower air inlet in a vertical flow direction.
4. An electric cooking appliance as claimed in claim 3, characterized in that the bottom wall is provided with a wind deflector, which wind deflector is arranged above the lower air inlet, the projection of the wind deflector on the horizontal plane at least partially covering the lower air inlet.
5. The electric cooking appliance according to claim 1, wherein the air blowing cover includes an upper air duct plate and a lower air duct plate provided at a lower outer side of the upper air duct plate, and a connection plate extending toward a circumferential outer side thereof is provided at a bottom of the lower air duct plate, the connection plate being connected to a top of the side wall.
6. The electric cooking appliance of claim 5, wherein the heating means comprises a blowing wind wheel and an electric heating tube provided directly under the blowing wind wheel, the upper air duct plate is provided outside the blowing wind wheel, and the lower air duct plate is provided outside the electric heating tube.
7. The electric cooking appliance of claim 6, wherein the motor drives the induced draft wind wheel and the forced draft wind wheel to rotate synchronously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810927165.1A CN108771489B (en) | 2018-08-14 | 2018-08-14 | Efficient heat dissipation electric cooking appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810927165.1A CN108771489B (en) | 2018-08-14 | 2018-08-14 | Efficient heat dissipation electric cooking appliance |
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| CN108771489A CN108771489A (en) | 2018-11-09 |
| CN108771489B true CN108771489B (en) | 2024-01-09 |
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| CN201810927165.1A Active CN108771489B (en) | 2018-08-14 | 2018-08-14 | Efficient heat dissipation electric cooking appliance |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2018316266A1 (en) | 2017-08-09 | 2020-02-20 | Sharkninja Operating Llc | Cooking device and components thereof |
| CN110876559A (en) * | 2018-11-13 | 2020-03-13 | 九阳股份有限公司 | Multifunctional cooking utensil |
| CN109497844A (en) * | 2018-12-30 | 2019-03-22 | 欧贤超 | A kind of improved air fryer |
| EP3931493A1 (en) | 2019-02-25 | 2022-01-05 | SharkNinja Operating LLC | Cooking system with guard |
| US20190254476A1 (en) | 2019-02-25 | 2019-08-22 | Sharkninja Operating Llc | Cooking device and components thereof |
| CN112155437B (en) * | 2019-10-20 | 2021-12-14 | 浙江仙龙电机科技有限公司 | Oven heat radiation structure |
| CN111156183B (en) * | 2019-12-31 | 2021-04-23 | 宁波市嘉乐电器有限公司 | Food cooking equipment with upper and lower air inlet cooling system |
| US11647861B2 (en) | 2020-03-30 | 2023-05-16 | Sharkninja Operating Llc | Cooking device and components thereof |
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| CN108771489A (en) | 2018-11-09 |
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