Cooking appliance and cooking appliance control method

Abstract

The present invention discloses a cooking utensil and a control method for the cooking utensil, which belong to the field of household appliance technology and are designed to solve the problems of slow heat dissipation speed of existing cooking utensil. The cooking utensil provided by the present invention comprises: a box body, in which an exhaust passage, a cooking cavity and a vent pipe are arranged, and the vent pipe connects the cooking cavity to the exhaust passage; a baffle plate, which is used to open or cover the vent pipe; and a longitudinal drive device, which is used to drive the baffle plate to move along the axial direction of the vent pipe. The cooking utensil and the control method for the cooking utensil provided by the present invention use the baffle plate to open or cover the vent pipe, which can improve the efficiency of exhausting hot air and oil smoke and avoid scalding accidents; and can also avoid unnecessary heat loss, and the temperature in the cooking cavity rises quickly, which is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a cooking appliance and a control method of the cooking appliance. Background Art

[0002] Electric ovens and electric steam ovens require high temperatures to cook food, and a certain amount of hot air will remain in the cooking chamber during and after the cooking process. If the hot air is not discharged in time, the hot air will surge out when the user opens the door, which can easily cause scalding accidents.

[0003] Existing electric ovens and electric steam ovens are usually provided with a heat dissipation duct, and the cooking cavity and the heat dissipation duct are connected through an exhaust hole. Hot air and oil smoke in the cooking cavity can enter the heat dissipation duct through the exhaust hole, and then be discharged out of the box through the heat dissipation duct.

[0004] The size of the exhaust hole is a relatively difficult value to determine in the design of existing electric ovens and electric steam ovens. Large exhaust holes can quickly exhaust hot air and oil smoke, but at the same time will cause the heat in the cooking cavity to lose quickly, the electric oven and electric steam oven will heat up slowly, and the cooking time will take a long time; small exhaust holes can reduce the heat loss in the cooking cavity and improve cooking efficiency, but it is difficult to quickly exhaust the hot air after cooking, and the user is easily burned by the hot air when opening the door to take out food. Summary of the invention

[0005] The purpose of the present invention is to provide a cooking utensil and a control method for the cooking utensil, which has a fast temperature rise speed and timely heat discharge, thereby avoiding scalding accidents.

[0006] To achieve this object, on the one hand, the present invention adopts the following technical solutions:

[0007] A cooking appliance comprises: a box body, in which an exhaust passage, a cooking cavity and a vent pipe are arranged, and the vent pipe connects the cooking cavity to the exhaust passage; a baffle plate for opening or covering the vent pipe; and a longitudinal drive device for driving the baffle plate to move along the axial direction of the vent pipe.

[0008] In one of the preferred embodiments, the longitudinal drive device is a pneumatic cylinder, a hydraulic cylinder or an electromagnetic lock.

[0009] In one preferred embodiment, the baffle includes a top surface, a side surface, and a transition arc surface connected between the top surface and the side surface.

[0010] In one of the preferred embodiments, the longitudinal drive device includes a connecting shaft, the outer circumferential surface of the connecting shaft is at least partially provided with threads, and the top surface is provided with a mounting through hole, and the threads are screwed into the mounting through hole.

[0011] In one of the preferred embodiments, a top plate through hole is opened on the cavity top plate of the cooking cavity, and the edge of the top plate through hole extends away from the cooking cavity to form a limiting convex edge, and the ventilation pipe is sleeved on the outer side of the limiting convex edge.

[0012] In one of the preferred embodiments, the cavity top plate and the limiting convex edge are connected via a top plate arc surface, and the transition arc surface abuts against the top plate arc surface.

[0013] In one of the preferred embodiments, the cooking appliance further includes a transfer channel, the transfer channel is connected to the ventilation pipe, an extension direction of the transfer channel and an extension direction of the ventilation pipe form a set angle, and a heat dissipation hole is provided between the transfer channel and the exhaust channel.

[0014] In one of the preferred embodiments, a fan is provided in the exhaust passage, and the ventilation pipe is located between the fan and the heat dissipation hole.

[0015] In one of the preferred embodiments, the cooking appliance further comprises a temperature sensor for detecting the temperature in the cooking cavity; and / or the cooking appliance further comprises a fume sensor for detecting the fume concentration in the cooking cavity.

[0016] On the other hand, the present invention adopts the following technical solutions:

[0017] A method for controlling a cooking appliance, based on the above-mentioned cooking appliance, when the temperature in the cooking cavity needs to be increased, the longitudinal drive device drives the baffle to cover the vent pipe; when hot air and / or oil smoke needs to be discharged, the longitudinal drive device drives the baffle to open the vent pipe.

[0018] The longitudinal drive device of the cooking utensil provided by the present invention can drive the baffle to move along the axial direction of the ventilation pipe to open or cover the ventilation pipe, which can not only improve the efficiency of exhausting hot air and oil smoke to avoid scalding accidents, but also avoid unnecessary heat loss, and the temperature in the cooking cavity rises quickly, which is easy to use.

[0019] The control method of the cooking appliance provided by the present invention can open or cover the ventilation pipe as needed. When hot air and oil smoke need to be discharged, the discharge speed is fast; when hot air and oil smoke do not need to be discharged, the heat in the cooking cavity will not be lost, and the food cooking speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the structure of a cooking utensil provided in a specific embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 It is a structural schematic diagram of a baffle opening a vent pipe provided by a specific embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a baffle shielding a ventilation pipe provided by a specific embodiment of the present invention.

[0024] In the figure:

[0025] 1. Box body; 2. Baffle; 3. Longitudinal drive device; 4. Temperature sensor; 5. Oil fume sensor; 11. Exhaust channel; 12. Cooking chamber; 13. Ventilation pipe; 14. Chamber top plate; 15. Limiting convex edge; 16. Arc surface of top plate; 17. Transfer channel; 18. Heat dissipation hole; 19. Fan; 21. Top surface; 22. Side surface; 23. Transition arc surface; 31. Connecting shaft; 32. Thread. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] This embodiment provides a cooking appliance that uses high temperature to process food, which can be, but is not limited to, an oven and a steam oven. Figures 1 to 3 As shown, the cooking appliance comprises a housing 1, a baffle 2 and a longitudinal drive device 3. The housing 1 is provided with an exhaust passage 11, a cooking cavity 12 and a vent pipe 13, the vent pipe 13 connects the cooking cavity 12 to the exhaust passage 11; the longitudinal drive device 3 is used to drive the baffle 2 to move along the axial direction of the vent pipe 13 (such as Figure 2 The baffle plate 2 is moved (as indicated by the straight line with double arrows) to open or cover the vent pipe 13.

[0033] The control method of the cooking appliance is as follows: Figure 2 As shown, when the temperature in the cooking cavity 12 needs to be increased, the longitudinal drive device 3 drives the baffle 2 to cover the vent 13; Figure 3 As shown, when it is necessary to discharge hot air and / or oil smoke, the longitudinal drive device 3 drives the baffle 2 to open the ventilation pipe 13. Figure 3 The arrow in the middle shows the direction of airflow.

[0034] The cooking device is provided with a baffle plate 2 at the vent pipe 13, and the vent pipe 13 can be opened or blocked as needed, which can not only improve the efficiency of exhausting hot air and oil smoke and avoid scalding accidents, but also avoid unnecessary heat loss, and the temperature rises quickly in the cooking cavity 12, which is convenient to use. The shape and size of the vent pipe 13 and the exhaust passage 11 can be designed according to the volume of the cooking device and the capacity of the cooking cavity 12, and the vent pipe 13 and the exhaust passage 11 can be designed to be relatively thick. As long as the baffle plate 2 blocks the vent pipe 13, heat loss can be avoided. After the baffle plate 2 is opened, hot air and oil smoke can be efficiently exhausted, and the scope of use is wider.

[0035] The longitudinal drive device 3 can be, but is not limited to, a cylinder, a hydraulic cylinder or an electromagnetic lock. The advantages of the cylinder and the hydraulic cylinder are that the moving distance of the baffle 2 can be adjusted by itself, thereby adjusting the width of the gap between the baffle 2 and the vent pipe 13 to speed up or slow down the emission of oil smoke and hot air, which is more convenient to use. The advantage of the electromagnetic lock is that it is easy to control, and only two states of power on and power off are required to control the downward movement and reset of the baffle 2. Although the downward movement distance of the baffle 2 is a fixed value, which makes it impossible to adjust the width of the gap between the baffle 2 and the vent pipe 13, it is easy to use and low in cost, which is enough for ordinary household ovens or steam ovens.

[0036] The specific shape of the baffle 2 is not limited, and it can open or cover the vent pipe 13 as needed. Figure 4 As shown, the baffle 2 includes a top surface 21 , a side surface 22 and a transition arc surface 23 , and the transition arc surface 23 is connected between the top surface 21 and the side surface 22 .

[0037] When the longitudinal driving device 3 pulls the baffle plate 2 to reset, the baffle plate 2 will collide with the vent pipe 13 and the structures near it. The side surface 22 and the transition arc surface 23 can increase the strength of the top surface 21 to prevent the baffle plate 2 from deforming due to the hard collision, thereby ensuring that the baffle plate 2 can completely cover the vent pipe 13 and avoid a gap between the baffle plate 2 and the vent pipe 13 after the baffle plate 2 is reset.

[0038] In addition, the diameter (width) of the transition camber 23 is different along the axial direction of the vent pipe 13. When the vent pipe 13 or its nearby structures have size errors due to processing accuracy problems, the transition camber 23 can adjust the contact position by itself to ensure that the baffle 2 can tightly cover the vent pipe 13. Specifically, when the actual size of the vent pipe 13 or its nearby structures is smaller than the set value, the portion of the transition camber 23 close to the top surface 21 will abut against the vent pipe 13 or its nearby structures; when the actual size of the vent pipe 13 or its nearby structures is larger than the set value, the portion of the transition camber 23 close to the side surface 22 will abut against the vent pipe 13 or its nearby structures.

[0039] On the basis of the above structure, the longitudinal driving device 3 includes a connecting shaft 31, the outer peripheral surface of the connecting shaft 31 is at least partially provided with a thread 32, and a mounting through hole is provided on the top surface 21, and the thread 32 is screwed into the mounting through hole. The baffle 2 is easy to disassemble and assemble, and the specific position of the baffle 2 at the thread 32 can be adjusted according to the actual length of the connecting shaft 31, so as to avoid the baffle 2 being unable to tightly cover the vent pipe 13 or the extrusion force between the baffle 2 and the vent pipe 13 being too large due to manufacturing errors, thereby extending the service life of the baffle 2 and the longitudinal driving device 3.

[0040] In order to further improve the tightness of the baffle 2 in shielding the vent pipe 13, a top plate through hole is opened on the cavity top plate 14 of the cooking cavity 12, and the edge of the top plate through hole extends away from the cooking cavity 12 to form a limiting convex edge 15. The vent pipe 13 is sleeved on the outside of the limiting convex edge 15. After the vent pipe 13 is installed, the structure is more stable, and the limiting convex edge 15 can prevent the vent pipe 13 from moving in the radial direction.

[0041] The vent pipe 13 is sealed and connected to the limiting convex edge 15, and the baffle 2 is blocked at the limiting convex edge 15, which is equivalent to blocking the vent pipe 13. The cavity top plate 14 is connected to the limiting convex edge 15 through the top plate arc surface 16, and the transition arc surface 23 abuts on the top plate arc surface 16. Like the transition arc surface 23, the diameter (width) of the top plate arc surface 16 is also continuously changed along the axial direction of the vent pipe 13. When the baffle 2 is reset, the transition arc surface 23 and the top plate arc surface 16 can automatically adjust to a suitable abutting position, thereby solving the problem of loose contact between the two parts caused by processing errors, and can more effectively prevent heat from being lost from the vent pipe 13.

[0042] In order to prevent the airflow in the cooking cavity 12 from being too strong when the baffle 2 opens the vent 13, the cooking appliance further includes a transfer channel 17, which is connected to the vent 13. The extension direction of the transfer channel 17 forms a set angle with the extension direction of the vent 13, which can effectively reduce the speed of the gas when it flows through, and reduce the airflow intensity in the cooking cavity 12 without affecting the exhaust effect of hot gas and oil smoke, so that the cooked food has a better shape and taste.

[0043] A heat dissipation hole 18 is provided between the transfer channel 17 and the exhaust channel 11, and the number and shape of the heat dissipation holes 18 can be determined as required. In order to prevent the cold air in the exhaust channel 11 from flowing into the transfer channel 17 from the heat dissipation hole 18, an inclined windshield (not shown) can be provided outside the heat dissipation hole 18. The windshield is provided on the upwind side of the heat dissipation hole 18 and is inclined along the airflow direction in the exhaust channel 11. When the airflow passes through, it needs to climb along the windshield, and when the airflow passes over the windshield, it is already on the downwind side of the heat dissipation hole 18. The design of the windshield does not affect the formation of negative pressure by the airflow at the heat dissipation hole 18, and can also prevent the airflow from flowing back into the heat dissipation hole 18, thereby preventing the heat in the cooking cavity 12 from dropping rapidly.

[0044] The specific structure of the exhaust passage 11 is not limited, as long as it can discharge the hot air and oil smoke in the cooking cavity 12. In this embodiment, the exhaust passage 11 is surrounded by a heat dissipation duct cover plate (not shown) located at the top and a heat dissipation duct bottom plate (not shown) located at the bottom. A fan 19 is installed at the end of the exhaust passage 11, and the fan 19 generates airflow in the exhaust passage 11. The ventilation pipe 13 is located between the fan 19 and the heat dissipation hole 18. The end of the exhaust passage 11 is usually spacious to accommodate the fan 19; the front end of the exhaust passage 11 is usually narrow to increase the airflow speed. The heat dissipation hole 18 is set at a position relatively farther away from the fan 19, and the negative pressure formed by the airflow at the heat dissipation hole 18 is larger, which is more conducive to the exhaust of hot air and oil smoke.

[0045] On the basis of the above structure, the cooking appliance further includes a temperature sensor 4 for detecting the temperature in the cooking cavity 12 and an oil fume sensor 5 for detecting the oil fume concentration in the cooking cavity 12 .

[0046] The first period of time when the cooking appliance is started is the preheating stage, during which the temperature in the cooking cavity 12 is not high and there is no smoke to be discharged. At this time, the baffle 2 blocks the vent pipe 13, and the cooking cavity 12 forms a sealed space, so there is no heat loss, the temperature in the cooking cavity 12 rises quickly, and the food is cooked faster.

[0047] After the heating tube (not shown) of the cooking appliance works for a period of time, the temperature sensor 4 detects the temperature in the cooking cavity 12. When the temperature reaches the set value, the heating tube stops working, otherwise the heating tube continues to work.

[0048] The oil smoke sensor 5 monitors the oil smoke pollution level in the cooking cavity 12. When the oil smoke turbidity reaches the program setting value σ, the longitudinal driving device 3 is started, and the longitudinal driving device 3 drives the baffle 2 to move downward along the axial direction of the ventilation pipe 13, and a gap is formed between the baffle 2 and the ventilation pipe 13 for hot air and oil smoke to pass through. The fan 19 forms an airflow in the exhaust channel 11, and the airflow forms a negative pressure at the heat dissipation hole 18. Under the action of the negative pressure, the hot air and oil smoke pass through the ventilation pipe 13, the transfer channel 17 and the heat dissipation hole 18 into the exhaust channel 11, and then are discharged out of the box 1 together with the airflow.

[0049] When the oil smoke turbidity detected by the oil smoke sensor 5 is lower than the set value τ (τ<σ), the longitudinal driving device 3 drives the baffle 2 to move upward along the axial direction of the ventilation pipe 13 until the baffle 2 blocks the ventilation pipe 13. This prevents the heat in the cooking cavity 12 from being lost from the ventilation pipe 13, keeps the cooking cavity 12 in a high temperature state, speeds up the cooking speed of food, and saves energy, reduces emissions and reduces consumption.

[0050] Before the food is cooked, the longitudinal drive device 3 is started in advance, and the longitudinal drive device 3 drives the baffle 2 to move down along the axis direction of the ventilation pipe 13, and the ventilation pipe 13 is opened again, and the hot air in the cooking cavity 12 is discharged through the ventilation pipe 13, the transfer channel 17, the heat dissipation hole 18 and the exhaust channel 11. When the cooking work is completely completed, the hot air in the cooking cavity 12 has been dissipated to a safe value. When the user opens the door to take out the food, a large amount of hot air will not flow out of the cooking cavity 12, and there will be no scalding accidents.

[0051] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A cooking utensil, characterized in that: include: A box body (1) is provided with an exhaust passage (11), a cooking cavity (12) and a ventilation pipe (13), wherein the ventilation pipe (13) connects the cooking cavity (12) to the exhaust passage (11); a baffle (2) for opening or shielding the vent pipe (13), the baffle (2) comprising a top surface (21), a side surface (22), and a transition arc surface (23) connected between the top surface (21) and the side surface (22); and, A longitudinal drive device (3) for driving the baffle (2) to move along the axial direction of the ventilation pipe (13); A top plate through hole is provided on the top plate (14) of the cooking cavity (12); the edge of the top plate through hole extends in a direction away from the cooking cavity (12) to form a limiting convex edge (15); and the ventilation pipe (13) is sleeved on the outer side of the limiting convex edge (15); The cavity top plate (14) and the limiting convex edge (15) are connected via a top plate arc surface (16), and the transition arc surface (23) abuts against the top plate arc surface (16).

2. The cooking device according to claim 1, characterized in that: The longitudinal movement driving device (3) is a cylinder, a hydraulic cylinder or an electromagnetic lock.

3. The cooking device according to claim 1, characterized in that: The longitudinal drive device (3) comprises a connecting shaft (31), the outer peripheral surface of the connecting shaft (31) is at least partially provided with a thread (32), and the top surface (21) is provided with a mounting through hole, and the thread (32) is screwed into the mounting through hole.

4. The cooking device according to any one of claims 1 to 3, characterized in that: The cooking appliance further comprises a transfer channel (17), the transfer channel (17) being connected to the ventilation pipe (13), the extension direction of the transfer channel (17) and the extension direction of the ventilation pipe (13) forming a set angle, and a heat dissipation hole (18) being provided between the transfer channel (17) and the exhaust channel (11).

5. The cooking device according to claim 4, characterized in that: A fan (19) is provided in the exhaust passage (11), and the ventilation pipe (13) is located between the fan (19) and the heat dissipation hole (18).

6. The cooking device according to any one of claims 1 to 3, characterized in that: The cooking appliance further comprises a temperature sensor (4) for detecting the temperature in the cooking cavity (12); and / or the cooking appliance further comprises an oil fume sensor (5) for detecting the oil fume concentration in the cooking cavity (12).

7. A method for controlling a cooking appliance, characterized in that: Based on the cooking appliance described in any one of claims 1 to 6, when it is necessary to increase the temperature in the cooking cavity (12), the longitudinal drive device (3) drives the baffle (2) to cover the vent pipe (13); when it is necessary to discharge hot air and / or oil smoke, the longitudinal drive device (3) drives the baffle (2) to open the vent pipe (13).

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