CN111195068A

CN111195068A - Cooking appliance and cooking method

Info

Publication number: CN111195068A
Application number: CN201911044644.XA
Authority: CN
Inventors: 姚斌; 陈舒; 樊杜平
Original assignee: SEB SA
Current assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd; SEB SA
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-05-26

Abstract

The invention discloses a cooking appliance and a cooking method. The pressure device is provided in the cover body, and the pressure device includes a steam discharge channel and a pressure member disposed gravitationally above the steam discharge channel. A pressure regulating device is provided in the lid body adjacent to the pressure member, the pressure regulating device being capable of applying a force to the pressure member opposite to the force of gravity to vary the force of the pressure member acting on the steam discharge channel. The control device is electrically connected with the pressure adjusting device, and the control device is configured to adjust the acting force according to the pressure in the cooking space so as to keep the pressure at a preset pressure, wherein the preset pressure is greater than the external atmospheric pressure. The cooking appliance according to the present invention can maintain the boiling intensity in the cooking space while ensuring the pressure balance in the cooking space, thereby making the food more cooked and the broth more mellow.

Description

Cooking appliance and cooking method

Technical Field

The present invention relates to a cooking appliance and a cooking method for the same.

Background

Pressure cooking appliances generally boil the cooking liquor in the pot by heating the inner pot after sealing the pot, and then generate a certain pressure in the pot and maintain the pressure. The existing cooking appliances generally control the pressure balance in the cooker by adjusting the heating power of the heating device. When the pressure in the cooker exceeds the preset value, the heating is stopped, and when the pressure in the cooker is reduced, the heating is recovered, so that the pressure is increased to the preset value by the generated steam. When the pressure is maintained for a certain time, the cooking is finished. When the cooking utensil is used for cooking soup, protein and various nutrients in food cannot be fused with water and dissolved in the soup through sufficient interaction for a long time because the liquid is not boiled sufficiently, so that the nutritional ingredients in the soup are less, the taste of the soup is poorer, and the user experience is influenced.

Therefore, there is a need to provide a cooking appliance and a cooking method for the same to at least partially solve the above-mentioned problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to solve the above problems at least in part, an aspect of the present invention discloses a cooking appliance, including:

the cooker body is internally provided with an inner pot;

the cover body is arranged above the cooker body in a covering manner, and when the cover body covers the cooker body, a cooking space is formed between the cover body and the inner pot;

a pressure device provided in the cover body, the pressure device including a steam discharge channel and a pressure member placed above the steam discharge channel by gravity;

a pressure adjustment device provided in the lid body in proximity to the pressure member, the pressure adjustment device being capable of applying a force to the pressure member opposing the gravitational force to vary a force of the pressure member acting on the steam discharge channel; and

a control device electrically connected to the pressure regulating device, the control device configured to regulate the acting force according to the pressure in the cooking space to maintain the pressure at a predetermined pressure, the predetermined pressure being greater than the outside atmospheric pressure.

According to the cooking utensil provided by the invention, the pressure adjusting device is arranged to adjust the force of the pressure member acting on the steam discharge channel, the scheme can indirectly adjust the pressure in the cooking space, so that the pressure balance in the cooking space can be ensured only by adjusting the force of the pressure member acting on the steam discharge channel, meanwhile, the proper heating power can be selected according to different food types and food sizes to realize sufficient heating, different boiling degrees can be realized, and the soup can move sufficiently and rub against the food sufficiently to enable protein and nutrient components in the food to be fused into the soup. In addition, the proper pressure is kept in the cooking space, so that the cooking temperature is higher, the food is easier to be well cooked, the cooking time is shortened, the mouthfeel of the food is improved, and the taste of the soup is more mellow.

Preferably, the pressure member is a gravity ball having magnetism, and the pressure adjusting means is a magnetic means capable of generating an attractive force to the gravity ball opposite to the gravity. The solution is easier to implement and less costly.

Preferably, the pressure regulating means comprises an electrical coil wound around and outside the gravity ball. The solution is easy to manufacture and easy to install.

Preferably, the number of turns of the electrified coil is 100-1000 turns. The scheme can further ensure the magnetic effect.

Preferably, a projection of a center of gravity of the gravity ball in a vertical central plane is not lower than a lowest point of a projection of the energized coil in the vertical central plane. The scheme can further ensure the magnetic effect of the electrified coil on the gravity ball.

Preferably, the gravity ball has a center of gravity located below a center of the electrical coil in a height direction of the electrical coil. The scheme can ensure that the electrified coil generates upward attraction to the gravity ball.

Preferably, the pressure adjusting device further comprises a PWM signal output electrically connected to the control device, the PWM signal output being electrically connected to the energizing coil to output a PWM signal to the energizing coil, and the control device controls the magnitude of the current to the energizing coil by controlling a duty ratio of the PWM signal. The scheme can dynamically adjust the attractive force of the electrified coil on the gravity ball.

Preferably, the electrical coil is wound directly on the outer surface of the gravity ball. The solution is easy to manufacture and easy to install.

Preferably, cooking utensil still includes spacing cover, spacing cover is established the outside of gravity ball, the circular telegram coil winding is in on the surface of spacing cover. The scheme can effectively limit the position of the gravity ball, is convenient to manufacture and is easy to install.

The invention also discloses a cooking method for the cooking appliance, which comprises the following steps: and adjusting the acting force of the pressure adjusting device on the pressure member according to the pressure in the cooking space so as to keep the pressure at a preset pressure, wherein the preset pressure is greater than the external atmospheric pressure.

The cooking method according to the present invention adjusts the force of the pressure member acting on the steam discharging passage by controlling the pressure adjusting means, and the pressure in the cooking space can be indirectly changed according to the formula P ═ F/S, and in this way, the pressure balance in the cooking space can be ensured by adjusting the force, and at the same time, the proper heating power can be selected according to different food types and food sizes to realize sufficient heating, and different boiling degrees can be realized, so that the soup can move sufficiently and rub against the food sufficiently to fuse the protein and the nutritional ingredients in the food into the soup. In addition, the proper pressure is kept in the cooking space, so that the cooking temperature is higher, the food is easier to be well cooked, the cooking time is shortened, the mouthfeel of the food is improved, and the taste of the soup is more mellow.

Preferably, the adjusting of the force applied to the pressure member by the pressure adjusting means according to the pressure in the cooking space further comprises:

determining whether the pressure in the cooking space exceeds the predetermined pressure; and

and adjusting the acting force generated by the pressure adjusting device according to the judgment result.

This scheme can easily maintain the pressure in the cooking space at a predetermined pressure.

Preferably, the cooking method further comprises:

controlling the pressure adjusting device to increase the acting force when the pressure in the cooking space is judged to exceed the preset pressure; and

and controlling the pressure adjusting device to reduce the acting force when the pressure in the cooking space is judged not to reach the preset pressure.

This scheme is through the size of the effort that control pressure adjustment device produced, can indirectly adjust the pressure size in the culinary art space to guarantee the pressure balance in the culinary art space.

Preferably, the pressure regulating means includes an energized coil, and the controlling the pressure regulating means to increase the force is performed by increasing a duty ratio of a PWM signal to increase a current to the energized coil; and is

The controlling the pressure regulating device to reduce the force is accomplished by reducing the duty cycle of the PWM signal to reduce the current to the energized coil.

This scheme is through the duty cycle of control PWM signal, can control the size of the effort that pressure adjustment device produced to pressure size in can the indirect adjustment culinary art space, thereby guarantee the pressure balance in the culinary art space.

Drawings

The following drawings of embodiments of the invention are included as part of the present invention for an understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is an exploded schematic view of a cooking appliance according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of a lid of the cooking appliance of FIG. 1;

FIG. 3 is a schematic diagram of a pressure device and a pressure regulating device of the cooking appliance of FIG. 1; and

fig. 4 is a flowchart of a cooking method for a cooking appliance according to a preferred embodiment of the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

Hereinafter, a cooking appliance according to a preferred embodiment of the present invention will be described with reference to fig. 1. It is understood that the cooking appliance according to the present invention may be an electric rice cooker, an electric pressure cooker or other cooking appliances, and the cooking appliance according to the present invention may have various functions of cooking porridge, cooking soup, etc. in addition to the function of cooking rice.

As shown in fig. 1, the cooking appliance 100 includes a pot body 110 and a lid 120. The pot body 110 is substantially in a rounded rectangular parallelepiped shape and has a cylindrical-shaped inner pot receiving portion, and the inner pot 111 can be freely put into or taken out from the inner pot receiving portion to facilitate cleaning of the inner pot 111. The inner pot 111 is generally made of a metal material and has a circular opening on an upper surface for containing a material to be heated, such as rice, soup, etc.

The cover 120 has a substantially rounded rectangular parallelepiped shape and substantially corresponds to the shape of the pot body 110. The lid body 120 is pivotally connected to the pot body 110 in an openable and closable manner for covering the pot body 110. The cover 120 includes an outer cover 121 and a removable cover member 122, and the removable cover member 122 is detachably connected to the outer cover 121 to facilitate cleaning of the removable cover member 122 at any time. When the cover 120 is covered on the pot body 110, the detachable cover part 122 covers the inner pot 111, and a cooking space is formed between the detachable cover part 122 and the inner pot 111. Also, the lid body 120 typically has a gasket (not shown) thereon, which may be made of, for example, a rubber material, and is disposed between the removable lid member 122 and the inner pan 111 for sealing the cooking space when the lid body 120 is in a closed state.

In addition, the cooking appliance 100 may include a control device for implementing cooking control of the cooking appliance 100. For example, the Control device may be a Micro Control Unit (MCU). The cooking appliance 100 may further include a heating device (not shown) for heating the inner pan 111, the heating device being electrically connected with the control device.

Referring to fig. 1 to 3, a pressure device 130 is further disposed in the cover 120, and the pressure device 130 can maintain a certain pressure in the cooking space. Specifically, the pressure device 130 includes a steam discharge passage 131 and a pressure member disposed above the steam discharge passage 131. The steam discharge channel 131 is provided on the detachable cover part 122. The steam discharging channel 131 has an inlet facing the inner pot 111 when the cover 120 is closed over the pot body 110, and an outlet facing the pressure member. During cooking, the steam discharge passage 131 is closed and opened by controlling the pressure member, and the sealing and discharging of the steam in the inner pot 111 can be achieved. Preferably, the pressure member is a gravity ball 132, and the gravity ball 132 may be placed on the steam discharging channel 131 by its gravity, thereby keeping the cooking space airtight. In a preferred embodiment, gravity ball 132 is magnetic or ferromagnetic, or gravity ball 132 may be made of other materials capable of magnetic attraction.

The cooking appliance further comprises a retaining cap 150, the retaining cap 150 being substantially hemispherical and having a profile substantially corresponding to the profile of the gravity ball 132. The position-limiting cover 150 is sleeved outside the gravity ball 132 to limit the movement of the gravity ball 132. When gravity ball 132 opens vapor discharge channel 131, gravity ball 132 may abut against the inner surface of caging cap 150.

The cooking appliance 100 further includes a pressure adjusting device 140, the pressure adjusting device 140 is disposed in the cover 120, as shown in fig. 2-3, the pressure adjusting device 140 is disposed outside the gravity ball 132 and is located at an intermediate position of the gravity ball 132. Pressure adjustment device 140 is capable of applying a force to gravity ball 132 that opposes its gravity to vary the force that gravity ball 132 exerts on vapor discharge passage 131. The control device is electrically connected to the pressure adjustment device 140, and the control device is capable of varying the force generated by the pressure adjustment device 140. By varying the force F according to the formula P/S, the maximum pressure that can be maintained in the boiler can be indirectly adjusted, in which case the heating power is increased, ensuring that the pressure P (often called "pressure") is maintained at a predetermined pressure, regardless of the degree of boiling in the boiler. The present invention is based on the above principle.

Above-mentioned scheme can change the pressure in the culinary art space indirectly through the power of adjustment gravity ball 132 effect on steam discharge channel 131 to guarantee the pressure balance in the culinary art space, can select suitable heating power to realize abundant heating according to different food types and food size simultaneously, and can realize different boiling degrees, thereby can let the hot water juice abundant movement and with food abundant friction and make protein and nutrient composition in the food fuse to the hot water in. In addition, the proper pressure is kept in the cooking space, so that the cooking temperature is higher, the food is easier to be well cooked, the cooking time is shortened, the mouthfeel of the food is improved, and the taste of the soup is more mellow. When cooking food such as meat, fish, poultry, etc., the heating power can be increased appropriately to make boiling more sufficient, and when cooking bean food, the heating power can be decreased appropriately to prevent the shape of the food from being damaged in the large boiling.

Preferably, the pressure adjustment device 140 is configured as a magnetic device capable of generating an attractive force to the gravity ball 132 opposite to the gravity force. Specifically, the pressure adjusting device 140 includes an electrical coil 141, and the electrical coil 141 may be wound by an insulated wire such as an enamel wire. In the illustrated embodiment, the energized coil 141 is wound around the outer surface of the position-restricting cover 150. Preferably, the number of turns of the energizing coil 141 is 100 to 1000 turns, for example, the energizing coil 141 may be set to 200 turns, 300 turns, or 500 turns, etc. according to the gravity of the gravity ball 132. In order to secure the magnetic force effect of the energized coil 141, it is preferable that the projection of the center of gravity of the gravity ball 132 in the vertical center plane is not lower than the lowest point of the projection of the energized coil 141 in the vertical center plane, and the center of gravity of the gravity ball 132 is located below the center of the energized coil 141 in the height direction of the energized coil 141. That is, the gravity ball 132 has a center of gravity located below the center of the height of the coil and a center of gravity located within the range of the energized coil 141.

Preferably, the pressure adjusting device 140 further comprises a PWM signal output terminal electrically connected to the control device, the PWM signal output terminal is electrically connected to the energizing coil 141 to output a PWM signal to the energizing coil 141, and the control device adjusts the current to the energizing coil 141 by controlling the duty ratio of the PWM signal, so as to realize stepless adjustment of the current of the coil, further realize adjustment of the force F, and realize dynamic adjustment of the pressure in the cooker. The pressure that can keep in the pot can be adjusted indirectly to above-mentioned scheme through changing electric current size regulating power F size, increases heating power this moment, and no matter the degree size of boiling in the pot, the culinary art space all can keep balanced pressure.

Specifically, as shown in fig. 2 and 3, when a current flows from the a end to the B end of the coil or a current flows from the B end to the a end, the coil is caused to generate an electromagnetic force, thereby generating an upward attractive force to the gravity ball 132, and causing a change in the force of the gravity ball 132 acting on the steam discharge channel 131, the larger the current, the smaller the force of the gravity ball 132 acting on the steam discharge channel 131, and conversely, the smaller the current, the larger the force of the gravity ball 132 acting on the steam discharge channel 131, so that a dynamic adjustment of the pressure in the cooking space can be realized. To prevent the gravity ball 132 from shaking, the operating frequency of the PWM signal output is preferably greater than 500 Hz.

Hereinafter, a cooking method according to the present invention will be described with reference to fig. 4.

At the start of cooking, the inner pot heating means heats the inner pot to bring the pressure in the cooking space to a predetermined pressure. The predetermined pressure may be preset by the user or may also be pre-stored in the system. When the pressure in the cooking space reaches the predetermined pressure, it is continuously judged whether the pressure in the cooking space exceeds the predetermined pressure, and the acting force of the pressure adjusting device 140 on the gravity ball 132 is dynamically adjusted according to the judgment result so that the pressure in the cooking space is maintained at the predetermined pressure. Wherein the predetermined pressure is greater than the atmospheric pressure of the outside.

In one embodiment, the cooking appliance 100 includes a pressure sensing device electrically connected to the control device to feed back a sensed pressure signal to the control device after sensing the pressure of the inner pot 111. Specifically, for example, the pressure at the location of the cooking appliance is measured as P0 before cooking, and the pressure in the preset pan is maintained at 20KPa, so that the predetermined pressure to be maintained in the cooking space can be calculated as P0+20 KPa. When the pressure in the cooker reaches P0+20Kpa under high-power heating, the A end and the B end of the two ends of the coil are electrified, and the PWM duty ratio is dynamically adjusted, so that the pressure in the cooker is always kept at about P0+20 Kpa. When the pressure exceeds P0+20Kpa, the PWM duty ratio is increased, so that the force of the gravity ball 132 acting on the steam discharge channel 131 is reduced, the exhaust volume can be increased, and the pressure in the cooker is reduced; when the pressure in the cooker is lower than P0+20Kpa, the PWM duty ratio is reduced, so that the force of the gravity ball 132 acting on the steam discharge channel 131 is increased to reduce the exhaust amount, thereby realizing the increase of the pressure in the cooker. The pressure in the cooker can be always maintained at the preset pressure by dynamically adjusting the PWM duty ratio through the control device.

In the case that the cooking appliance does not include the pressure sensing device, the cooking appliance may also maintain the pressure in the pot at a predetermined pressure through the temperature sensing device at all times. It will be appreciated by those skilled in the art that the boiling temperature of the liquid is directly proportional to the gas pressure, and that typically the boiling temperature increases by 1 ℃ for every 4Kpa of gas pressure rise. Therefore, for example, when the pressure in the cooker is maintained at 20KPa, the temperature in the sealed cooking utensil can be calculated to be maintained at the local boiling temperature T + (20/4) ° C. When cooking, after the upper temperature measurement temperature in the pot reaches T + (20/4) DEG C under high-power heating, the A end and the B end at the two ends of the coil are electrified, and the PWM duty ratio is dynamically adjusted, so that the temperature in the pot is always kept at about T + (20/4) DEG C. When the upper temperature exceeds T + (20/4) DEG C, the PWM duty ratio is increased, so that the force of the gravity ball 132 acting on the steam discharge channel 131 is reduced, the exhaust volume can be increased, and the pressure in the boiler is reduced; when the upper temperature is lower than T + (20/4) DEG C, the PWM duty ratio is reduced, so that the force of the gravity ball 132 acting on the steam discharge channel 131 is increased to reduce the exhaust volume, thereby realizing the increase of the pressure in the boiler.

According to the cooking appliance provided by the invention, the pressure of the pressure member acting on the steam discharge channel 131 is adjusted by the pressure adjusting device 140, and the pressure in the cooking space can be indirectly adjusted, so that the pressure balance in the cooking space can be ensured only by adjusting the force of the pressure member acting on the steam discharge channel 131, meanwhile, the proper heating power can be selected according to different food types and food sizes to realize sufficient heating, different boiling degrees can be realized, and the soup can fully move and fully rub with the food to fuse protein and nutritional ingredients in the food into the soup. In addition, the proper pressure is kept in the cooking space, so that the cooking temperature is higher, the food is easier to be well cooked, the cooking time is shortened, the mouthfeel of the food is improved, and the taste of the soup is more mellow.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.

Claims

1. A cooking appliance, characterized in that the cooking appliance (100) comprises:

the cooker comprises a cooker body (110), wherein an inner pot (111) is arranged in the cooker body (110);

the cover body (120) is arranged above the pot body (110) in a covering mode, and when the cover body (120) covers the pot body (110), a cooking space is formed between the cover body (120) and the inner pot (111);

a pressure device (130), the pressure device (130) being disposed in the cover (120), and the pressure device (130) including a steam discharge channel (131) and a pressure member placed gravitationally above the steam discharge channel (131);

a pressure regulating device (140), said pressure regulating device (140) being provided in said cover (120) in proximity to said pressure member, said pressure regulating device (140) being capable of applying a force to said pressure member opposing said gravitational force to vary the force of said pressure member acting on said steam discharge channel (131); and

a control device electrically connected to the pressure regulating device (140), the control device being configured to regulate the force according to the pressure in the cooking space to maintain the pressure at a predetermined pressure, the predetermined pressure being greater than the ambient atmospheric pressure.

2. The cooking appliance according to claim 1, wherein the pressure member is a gravity ball (132) having magnetism, and the pressure adjustment device (140) is a magnetic device capable of generating an attraction force on the gravity ball (132) opposite to the gravity force.

3. The cooking appliance according to claim 2, wherein the pressure regulating device (140) comprises an electrical coil (141), the electrical coil (141) being wound around the gravity ball (132) outside the gravity ball (132).

4. The cooking appliance according to claim 3, wherein the number of turns of the energizing coil (141) is 100 to 1000 turns.

5. The cooking appliance according to claim 3, wherein a projection of a center of gravity of the gravity ball (132) in a vertical center plane is not lower than a lowest point of a projection of the energized coil (141) in the vertical center plane.

6. The cooking appliance according to claim 5, wherein the gravity ball (132) has a center of gravity below a center of the electrical coil (141) in a height direction of the electrical coil (141).

7. The cooking appliance according to claim 3, wherein the pressure regulating device (140) further comprises a PWM signal output electrically connected to the control device, the PWM signal output being electrically connected to the energizing coil (141) to output a PWM signal to the energizing coil (141), the control device controlling the magnitude of the current to the energizing coil (141) by controlling the duty cycle of the PWM signal.

8. The cooking appliance according to claim 3, wherein the electrical coil (141) is wound directly on the outer surface of the gravity ball (132).

9. The cooking appliance according to claim 3, further comprising a position limiting cover (150), wherein the position limiting cover (150) is sleeved outside the gravity ball (132), and the energizing coil (141) is wound on the outer surface of the position limiting cover (150).

10. A cooking method for the cooking appliance according to any one of claims 1 to 9, wherein the cooking method comprises: adjusting a force applied to the pressure member by the pressure adjusting means (140) according to a pressure in the cooking space to maintain the pressure at a predetermined pressure, wherein the predetermined pressure is greater than an ambient atmospheric pressure.

11. The cooking method according to claim 10, wherein the adjusting the force applied by the pressure adjusting device (140) to the pressure member according to the pressure in the cooking space further comprises:

and adjusting the acting force generated by the pressure adjusting device (140) according to the judgment result.

12. The cooking method of claim 11, further comprising:

controlling the pressure adjusting means (140) to increase the acting force when it is judged that the pressure in the cooking space exceeds the predetermined pressure; and

controlling the pressure adjusting means (140) to reduce the acting force when it is judged that the pressure in the cooking space does not reach the predetermined pressure.

13. The cooking method according to claim 12, wherein the pressure regulating device (140) comprises an electrical coil (141), wherein

Said controlling said pressure regulating device (140) to increase said force is done by increasing the duty cycle of a PWM signal to increase the current to said energized coil (141); and is

The controlling the pressure regulating device (140) to reduce the force is done by reducing the duty cycle of the PWM signal to reduce the current to the energized coil (141).