Ohm heating device and cooking equipment

Abstract

The utility model relates to the technical field of ohmic heating, and discloses an ohmic heating device and cooking equipment, and the ohmic heating device comprises a heating inner container which is suitable for placing food; one of the electrode column and the heating inner container is positively charged, and the other one of the electrode column and the heating inner container is negatively charged; the adjusting device is in transmission connection with the electrode column and is suitable for adjusting the relative position of the discharging end of the electrode column and the food. The heating inner container containing food serves as an electrode, the contact area of the heating inner container and the food is large, current released by the electrode column can be evenly transmitted to the heating inner container after passing through the food, and then the food is evenly heated. The relative position of the electrode column and the food can be adjusted, the discharging end of the electrode column can be conveniently inserted into the center position of the food, the electric field distribution uniformity of the environment where the food is located is improved, and the food heating uniformity is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ohmic heating, in particular to an ohmic heating device and a cooking appliance. Background Art

[0002] The basic principle of ohmic heating is to regard food as a section of conductor in an electric circuit. When an electric current passes through, due to the resistance of the food itself, the heat effect of the current causes the food to heat up and cook. This method has the advantages of fast heating speed and high cooking efficiency.

[0003] In the related art, the ohmic heating cooking appliance is usually static, that is, the positions of the positive and negative electrodes are relatively fixed. For foods of different sizes and weights, the cooking process is generally adapted by adjusting the magnitude of the electrode voltage. However, adjusting the voltage magnitude can only change the intensity of the electric field and cannot change the uniformity of the electric field. However, whether the electric field distribution in the environment where the food is located is uniform is the key factor affecting the uniformity of food cooking.

[0004] During the cooking process, the food usually expands or shrinks in volume due to water absorption or loss of water. At this time, the relative position between the food and the heating module changes, resulting in unstable heat transfer effect among the foods, inevitably leading to uneven heating of the food and affecting the cooking effect. Summary of the Utility Model

[0005] In view of this, the utility model provides an ohmic heating device and a cooking appliance to solve the problem that the relative position change between the food and the heating module causes uneven heating of the food.

[0006] In a first aspect, the utility model provides an ohmic heating device, comprising:

[0007] A heating inner container, adapted to place food;

[0008] An electrode column, one of the electrode column and the heating inner container is positively charged, and the other is negatively charged;

[0009] An adjusting device, drivingly connected to the electrode column, adapted to adjust the relative position between the discharging end of the electrode column and the food.

[0010] Advantageous effects: One of the electrode column and the heating inner container is positively charged, and the other is negatively charged. The heating inner container for holding food is used as an electrode. The contact area between the heating inner container as an electrode and the food is large, so that the current released by the electrode column can be evenly transmitted to the heating inner container after passing through the food, thereby heating the food evenly; and the relative position between the electrode column and the food can be adjusted, which is convenient to insert the discharging end of the electrode column into the center position of the food, improving the uniformity of the electric field distribution in the environment where the food is located and effectively improving the uniformity of food heating.

[0011] In an optional embodiment, the ohmic heating device further comprises a positioning column, wherein the positioning column is nested on the outer side of the electrode column, and the electrode column can move along the axial direction of the positioning column.

[0012] Beneficial effects: The positioning column is nested on the outside of the electrode column. The electrode column can move with the positioning column, and can approach the food and contact the food, so as to locate the upper surface of the food, creating conditions for subsequent automatic control of the position of the electrode column; at the same time, the electrode column can move relative to the positioning column, which is convenient for the discharge end of the electrode column to be inserted into the food, and the nested method is adopted, so the structure is more compact.

[0013] In an optional embodiment, the adjusting device comprises:

[0014] Lifting frame;

[0015] A pressure sensor, disposed on the lifting frame, for monitoring the force change of the positioning column;

[0016] an elastic mechanism, wherein the positioning post is disposed at the lower end of the pressure sensor through the elastic mechanism; the elastic mechanism has a first state in which the positioning post is extended under the gravity of the positioning post and the electrode post, and a second state in which the elastic mechanism is deformed after the positioning post contacts the food;

[0017] A first driving mechanism is connected to the lifting frame and is adapted to drive the positioning column to move toward or away from the food;

[0018] The second driving mechanism is transmission-connected to the electrode column to drive the electrode column to move relative to the positioning column.

[0019] Beneficial effect: the positioning column is arranged at the lower end of the pressure sensor through an elastic mechanism, and the three are used as a whole, so that before cooking starts, the first driving mechanism drives the pressure sensor on the lifting frame to descend and drives the positioning column to move in the direction close to the food, so as to contact the upper surface of the food, and the second driving mechanism drives the electrode column to move downward and insert into the food so that the discharge end moves to the center of the food; when the volume of the food changes during the cooking process, if the volume of the food expands, the positioning column moves upward under the pushing effect of the food, and the elongation of the elastic mechanism becomes shorter or restores the original length or shortens. At this time, the pressure sensor senses the pressure change and feeds back to the control unit, which is convenient for controlling the electrode column to move upward to the food If the volume of food shrinks, the positioning column will separate from the food surface, the elastic mechanism will deform, the pressure sensor will sense the pressure change and feed it back to the control unit, so as to conveniently control the first driving mechanism to drive the positioning column to move downward again to contact with the food, and the second driving mechanism will also drive the electrode column to find the new center position of the food; it can be seen that the adjustment device can realize the adaptive lifting and lowering of the electrode column as the volume of food changes during the use of the cooking device, and can ensure that the discharge end of the electrode column is located at the center of the food, realize automatic matching of the best discharge position, so that the ohmic heating device can achieve the purpose of continuous and uniform distribution of the electric field, and the food can be guaranteed to be evenly heated throughout the cooking process.

[0020] In an optional embodiment, a scale is provided on the inner side of the heating liner, and the ohmic heating device further includes an image recognition sensor for monitoring the height of food.

[0021] Beneficial effect: After setting the scale mark, the image recognition sensor can quickly and intuitively monitor the change in food height, and then adjust the position of the electrode column in time to achieve uniform cooking of food.

[0022] In an optional embodiment, the first driving mechanism includes a motor drivingly connected to the positioning column.

[0023] Beneficial effect: The motor is connected to the positioning column to drive the positioning column to move. The motor-driven positioning column can be raised and lowered quickly and is also easy to control.

[0024] In an optional embodiment, the second driving mechanism includes an electromagnetic driving mechanism or a motor drivingly connected to the electrode column.

[0025] Beneficial effects: The electrode column is electromagnetically driven, with a simple and compact structure, and the motor-driven method has a fast lifting speed.

[0026] In an optional embodiment, the elastic mechanism includes a spring, and the spring is arranged between the pressure sensor and the positioning column.

[0027] Beneficial effects: The spring disposed between the pressure sensor and the positioning post is used to transmit pressure changes and serve as a buffer component, with a simple structure and low cost.

[0028] In an alternative embodiment, the ohmic heating device further includes a processor, and the pressure sensor, the first driving mechanism, and the second driving mechanism are respectively connected to the processor.

[0029] Beneficial effects: By obtaining the height change of the food during cooking through the processor, the first driving mechanism and the second driving mechanism are then controlled to drive the positioning post and the electrode post to move to adapt to the change in the volume of the food, and thus the position of the discharge end of the electrode post is adaptively adjusted, improving the uniformity of food heating.

[0030] In an alternative embodiment, the heating inner container is spherical, and the electrode post is disposed in the inner cavity of the heating inner container in a liftable manner.

[0031] Beneficial effects: By adopting a spherical heating inner container, the current released by the electrode post can be evenly transmitted to the spherical electrode in all directions around, enabling current to pass through the food in all directions in the spherical inner container, and the food can be heated evenly.

[0032] In a second aspect, the present utility model further provides a cooking device, including the ohmic heating device according to any one of the above.

[0033] Beneficial effects: The cooking device includes the ohmic heating device of the present utility model, and thus has the same technical effects as the ohmic heating device, which will not be elaborated here. Description of the Drawings

[0034] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a schematic structural diagram of an ohmic heating device according to an embodiment of the present utility model;

[0036] Figure 2 It is a schematic diagram of the state where the positioning post of the ohmic heating device according to an embodiment of the present utility model is separated from the food;

[0037] Figure 3 It is a schematic diagram of the state where the positioning post of the ohmic heating device according to an embodiment of the present utility model moves downward to contact the food;

[0038] Figure 4 Schematic diagram of the state where the electrode post moves to the center of the food after the positioning post of the ohmic heating device in the embodiment of the present invention contacts the food;

[0039] Figure 5 Schematic diagram of the state change of the positions of the positioning post and the electrode post after the food expands;

[0040] Figure 6 Schematic flow chart of a control method for an ohmic heating device in the embodiment of the present invention;

[0041] Figure 7 Schematic flow chart of another control method for an ohmic heating device in the embodiment of the present invention;

[0042] Figure 8 Schematic flow chart of still another control method for an ohmic heating device in the embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 1. Pressure sensor;

[0045] 2. Elastic mechanism;

[0046] 3. Positioning post;

[0047] 4. Electrode post; 41. Discharge end;

[0048] 5. Heating inner container;

[0049] 6. Food. Detailed implementation manners

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0051] In the description of the utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model 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 cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0053] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0054] According to an embodiment of the present utility model, on the one hand, as Figure 1 As shown, an ohmic heating device is provided, comprising:

[0055] A heating liner 5, suitable for placing food 6;

[0056] The electrode column 4, one of the electrode column 4 and the heating inner container 5 is positively charged, and the other is negatively charged;

[0057] The adjusting device is drivingly connected to the electrode column 4 and is suitable for adjusting the relative position between the discharge end 41 of the electrode column 4 and the food 6 .

[0058] One of the electrode column 4 and the heating inner pot 5 is positively charged, and the other is negatively charged. The heating inner pot 5 containing food 6 is used as an electrode. The heating inner pot 5 as an electrode has a large contact area with the food 6, so that the current released by the electrode column 4 can pass through the food 6 and then be evenly transferred to the heating inner pot 5, thereby evenly heating the food 6; and the relative position of the electrode column 4 and the food 6 is adjustable, so it is convenient to insert the discharge end 41 of the electrode column 4 into the center of the food 6, thereby improving the uniformity of the electric field distribution in the environment where the food 6 is located, and effectively improving the heating uniformity of the food 6.

[0059] Since the electrode column 4 and the heating inner pot 5 need to apply current to the food 6 to be heated, the food 6 to be heated needs to be placed in contact with the electrode column 4 and the heating inner pot. The food 6 is directly placed in contact with the heating inner pot 5. Therefore, in the actual heating process, by driving the electrode column 4 in contact with the food 6 to be heated to move, the electrode column 4 moves to contact with the food 6 and can be plugged into the center of the food, so that the food 6 is heated more evenly.

[0060] In some embodiments, the ohmic heating device further includes a positioning column 3 , which is nested on the outside of the electrode column 4 , and the electrode column 4 can move along the axial direction of the positioning column 3 .

[0061] The positioning column 3 is nested on the outside of the electrode column 4. The electrode column 4 can move with the positioning column 3, and can approach the food 6 and contact the food 6, so as to locate the upper surface of the food 6, creating conditions for the subsequent automatic control of the position of the electrode column 4; at the same time, the electrode column 4 can move relative to the positioning column 3, which is convenient for the discharge end 41 of the electrode column 4 to be inserted into the food 6, and the nested manner is adopted, so the structure is more compact.

[0062] In some embodiments, the adjusting device comprises:

[0063] Lifting frame;

[0064] The pressure sensor 1 is arranged on the lifting frame and is used to monitor the force change of the positioning column 3;

[0065] The elastic mechanism 2, the positioning column 3 is arranged at the lower end of the pressure sensor 1 through the elastic mechanism 2; the elastic mechanism 2 has a first state in which it is extended under the gravity of the positioning column 3 and the electrode column 4, and a second state in which the elastic mechanism 2 is deformed after the positioning column 3 contacts the food 6;

[0066] The first driving mechanism is connected to the lifting frame and is suitable for driving the positioning column 3 to move towards or away from the food 6;

[0067] The second driving mechanism is transmission-connected to the electrode column 4 to drive the electrode column 4 to move relative to the positioning column 3 .

[0068] The positioning post 3 is arranged at the lower end of the pressure sensor 1 through the elastic mechanism 2. The three are regarded as a whole. Before cooking starts, while the first driving mechanism drives the pressure sensor 1 on the lifting frame to descend, it also drives the positioning post 3 to move towards the food 6, so as to contact and position the upper surface of the food 6, facilitating the acquisition of the height of the food 6, and then calculating the food center. Then, the second driving mechanism drives the electrode post 4 to move downward and insert into the food 6 to move its discharging end 41 to the food center. During the cooking process, when the volume of the food 6 changes, if the volume of the food 6 expands, under the pushing action of the food 6, the positioning post 3 moves upward, and the elongation of the elastic mechanism 2 becomes shorter or returns to the original length or shortens. At this time, the pressure sensor 1 senses the pressure change and feeds it back to the control unit, facilitating the control of the electrode post 4 to also move upward to the new center position of the food 6; if the volume of the food 6 shrinks, the positioning post 3 disengages from the surface of the food 6, the elastic mechanism 2 deforms, the pressure sensor 1 senses the pressure change and feeds it back to the control unit, facilitating the control of the first driving mechanism to drive the positioning post 3 to move downward again to contact the food 6, and the second driving mechanism also drives the electrode post 4 to find the new center position of the food 6. It can be seen that through the adjustment device, the purpose that the electrode post 4 can adaptively lift and lower with the change of the volume of the food 6 during the use of the cooking device is achieved. During the cooking process, it is ensured that the discharging end 41 of the electrode post 4 can continuously make adjustments with the change of the volume of the food 6, so that the electrode post 4 is located at the food center, realizing the function of automatically matching the optimal discharging position, enabling the ohmic heating device to achieve the purpose of continuously and uniformly distributing the electric field in the environment where the food 6 is located, and ensuring that the food 6 can be uniformly heated throughout the cooking process.

[0069] It can be understood that the specific shape of the electrode post 4 of the ohmic heating device is not unique, and it can be a cylindrical electrode post 4, a prismatic electrode post 4, etc., without specific limitation. The types of the first driving mechanism for driving the lifting frame and the second driving mechanism for driving the movement of the electrode post 4 are not unique either. In some embodiments, the positioning post 3 can be lifted and lowered or the electrode post 4 can be telescoped relative to the positioning post 3 by means of motor driving; in other embodiments, electromagnetic driving can also be adopted, without specific limitation here, and it can be selected according to actual needs. For the convenience of understanding the technical solution of the present application, in the following embodiments, the way of driving the positioning post 3 to lift and lower by a motor and the driving way of making the electrode post 4 telescoped relative to the positioning post 3 by electromagnetic driving are used for explanation.

[0070] It can be understood that the lifting structure of the lifting frame is not unique. In some embodiments, an electric lifting structure can be adopted, and the user can operate the motor through a button or a controller, which has the advantages of fast lifting speed and convenient operation. In some other embodiments, a spiral lifting structure can also be adopted, which has the advantages of simple structure and high safety. In addition, a gear lifting structure can also be adopted.

[0071] In some embodiments, a scale is provided on the inner side of the heating inner container 5, and the ohmic heating device further includes an image recognition sensor for monitoring the height of the food 6.

[0072] After setting the scale mark, the change in the height of the food 6 can be quickly and intuitively monitored through the image recognition sensor, and then the position of the electrode column 4 can be adjusted in a timely manner to achieve uniform cooking of the food 6.

[0073] It should be noted that in some other embodiments, the pressure sensor 1, the spring and the positioning column 3 descend uniformly at a speed v. The contact position can be calculated by the speed v and the time t used from the start of movement until the positioning column 3 touches the food 6. Before touching the food 6, the deformation of the spring is a fixed value, and at this time, the pressure detected by the pressure sensor 1 is also a fixed value. At the moment when the positioning column 3 touches the food 6, due to the resistance of the food 6, the deformation of the spring immediately decreases at this time, and the pressure value detected by the pressure sensor 1 will mutate, and the force change is transmitted to the sensor, and the time t used is recorded; calculate the contact position, according to the time t used for the positioning column 3 to move to touch the food 6, and the speed v of the movement of the positioning column 3, the position d of the contact point of the food 6 from the top of the device can be calculated. Assuming v = 2 cm / s and t = 3 seconds, then d = vt = 2 * 3 = 6 cm. Then, the height of the food 6 is calculated through the height of the heating inner container or the inner diameter of the spherical heating inner container.

[0074] In some embodiments, the heating inner container 5 is spherical, and the electrode column 4 is disposed in the inner cavity of the heating inner container 5 in a liftable manner.

[0075] Adopting the spherical heating inner container 5, compared with the method of continuously heating at a single position in the related art, the current released by the electrode column 4 can be evenly transmitted to the spherical electrode in all directions around, and current can pass through all directions of the food 6 located in the spherical inner container, so that the food 6 can be evenly heated.

[0076] According to an embodiment of the present invention, on the other hand, a cooking device is further provided, including an ohmic heating device.

[0077] The cooking device includes the ohmic heating device of the present invention, so it has the same technical effects as the ohmic heating device, which will not be elaborated here.

[0078] As Figure 6 shown, a control method for an ohmic heating device of the present invention is applicable to the ohmic heating device or the cooking device, and includes the following steps:

[0079] Obtain the first height L of the food 6 in the ohmic heating device n , calculate the corresponding central position B of the food 6 n ;

[0080] The control and adjustment device lowers the electrode column 4 until its discharge end 41 coincides with B n ; n is a non-zero integer;

[0081] Control the ohmic heating device to start and operate according to the preset cooking parameters.

[0082] In the technical solution of the present application, the ohmic heating device is provided with a processor, which can be integrated with the processor of the cooking device to which the ohmic heating device is applied, or can be an additional setting of the processor of an independent cooking device, and no specific limitation is made.

[0083] When the food 6 to be heated is placed in the heating inner container 5 and the food 6 comes into contact with the electrode column 4, the processor of the ohmic heating device will control the electrode column 4 and the heating inner container 5 to be energized, apply an electric current to the food 6 to be heated through the electrode column 4, and the electric current is then transmitted to the heating inner container 5. Heat energy is generated inside the food 6 to be heated under the action of the directional electric current, thereby realizing ohmic heating. At the same time, during the heating process, the processor continuously obtains the volume change parameter (the height of the food 6) related to the food 6 to be heated.

[0084] After the processor obtains the first height L of the food 6 in the ohmic heating device n , according to L n calculate the corresponding central position B of the food 6 n , and then control the electrode column 4 to descend until its discharge end 41 coincides with B n . After the discharge end 41 coincides with the food center, start the ohmic heating device again to improve the heating uniformity of the food 6.

[0085] In some embodiments, further, as Figure 7 shown, after the ohmic heating device is started, it further includes the step of automatically adjusting the electrode column 4:

[0086] Obtain the second height L of the food 6 during the cooking process n+1 ;

[0087] Judge whether it satisfies L n+1 =L n ;

[0088] If not, then recalculate the central position B of the food during the cooking process according to L n+1 ; n+1 ;

[0089] Control the electrode column 4 to move until its discharge end 41 coincides with B n+1 ;

[0090] Repeat the step of automatically adjusting the electrode column 4 until the cooking ends.

[0091] During the cooking process, the height change of the food 6 is monitored in real time. As long as the height changes, it is necessary to calculate the new food center according to the new height of the food 6, and then control the electrode column 4 to move to the new food center position in real time, realizing the continuous adaptation process of the electrode column 4, ensuring the continuous and uniform heating of the food 6 until the cooking ends, and improving the cooking quality.

[0092] After the processor obtains the heating parameters corresponding to the food 6 to be heated, when the cooking conditions are met (such as reaching the preset cooking duration), the cooking ends. Specifically, the method of interrupting the current transmission from the electrode column 4 to the food 6 to be heated is adopted, and its implementation method is not unique. It can be to turn off the power supply connected to the electrode column 4 or the heating inner container 5, or to control the current channel between the power supply and the electrode column 4 or the heating inner container 5 to be disconnected, which can be specifically set according to the actual requirements.

[0093] Further, if L n+1 = L n is satisfied, continue to work according to the preset cooking parameters until the cooking ends.

[0094] In most cases, the volume of the food 6 will change during the cooking process. The volume change of the food 6 in the heating inner container 5 is mainly reflected in the change of the height of the food 6. Therefore, based on the change of the height of the food 6, if L n+1 = L n is not satisfied, it indicates that the height of the food 6 has changed. At this time, the food center position has also changed. By automatically adjusting the position of the electrode column 4, the discharge end 41 of the electrode column 4 is adaptively adjusted to the new food center, ensuring the uniform distribution of the electric field in the environment where the food 6 is located, realizing the continuous and uniform heating of the food 6, and having a good heating effect.

[0095] In some embodiments, the ohmic heating control method includes:

[0096] Obtain two pressure values F n and F n+1 detected by the pressure sensor 1 of the adjusting device at a preset time interval, and judge whether F n+1 = F n is satisfied;

[0097] If not, enter the step of automatically adjusting the electrode column 4.

[0098] The contact state between the positioning column 3 and the food 6 is monitored in real time through the pressure sensor 1. If F n+1 = F n is not satisfied, it indicates that the height of the food 6 has changed, and it is necessary to adjust the electrode column 4 so that its discharge end 41 is continuously located at the food center. The pressure sensor 1 is sensitive and can sensitively capture the minute change amount of the pressure, accurately feedback the change of the height of the food 6, and then timely adjust the position of the electrode column 4.

[0099] It should be noted that the method for determining whether the positioning post 3 contacts the food 6 is not unique. In some embodiments, a pressure detector may also be provided at the bottom end of the positioning post 3, and by detecting the pressure change, it is determined whether the positioning post 3 contacts the food 6 to be heated.

[0100] The processor is respectively connected to the first driving mechanism and the second driving mechanism, and is used to execute the steps of the above ohmic heating control method.

[0101] In some embodiments, the preset cooking parameters include a preset electrode voltage and a preset cooking duration.

[0102] The cooking parameters are preset according to the type and volume of the food 6 to ensure that the food 6 is cooked while having a good taste. The preset electrode voltage is set to change the electric field strength of the environment where the food 6 is located, and the cooking time is determined by the preset cooking duration. The food 6 can be cooked within the preset cooking duration, and the cooking process is adapted according to the preset electrode voltage and the preset cooking duration to ensure the cooking quality.

[0103] Specifically, the preset cooking duration is the preset cumulative heating duration required for the food 6 to be heated and cooked. The processor has a timing function, or a timer is additionally provided in the ohmic heating device. When the electrode post 4 applies current to the food 6 to be heated and starts ohmic heating, timing starts to obtain the heating duration of the food 6 to be heated.

[0104] It should be pointed out that in a more detailed embodiment, the magnitudes of the preset electrode voltage and the preset cooking duration are not unique. For different types of foods 6 to be heated, the processor can match corresponding preset electrode voltages and preset cooking durations for them. Specifically, the ohmic heating device can automatically identify the type of the current food 6 to be heated through image recognition or the like, so as to match the corresponding preset cooking temperature and preset cooking duration. It can also be that the user manually inputs the type of the current food 6 to be heated to the ohmic heating device, so as to match the corresponding preset cooking temperature and preset cooking duration, and the specific method is not limited.

[0105] An embodiment of the present utility model provides a cooking device. The cooking device is spherical, and the heating inner container 5 is also spherical. The pressure sensor 1 is connected to the positioning post 3 through a spring. The electrode post 4 is located inside the positioning post 3 and can move in the vertical direction in the heating inner container 5 with the positioning post 3 under the drive of the first driving mechanism. Moreover, the electrode post 4 can make a separate lifting movement under the drive of the second driving mechanism after the positioning post 3 stops. The discharge end 41 is located at the bottom of the electrode post 4. When the positioning post 3 descends to the surface of the food 6, the pressure sensor 1 can detect the pressure change. At this time, the height of the food 6 can be calculated according to the position of the positioning post 3, providing a basis for automatically adjusting the position of the electrode post 4.

[0106] In this embodiment, the heating inner container 5 is negatively charged and the electrode column 4 is positively charged. Of course, in some other embodiments, the heating inner container 5 can also be connected to the negative pole of the power supply, while the electrode column 4 is connected to the positive pole of the power supply. It can be specifically set according to needs and will not be limited here.

[0107] Before starting cooking, put the food 6 into the spherical heating inner container 5. At this time, there is a certain distance between the positioning column 3 and the electrode column 4 from the upper surface of the food 6, as Figure 2 shown. Then control the positioning column 3 to descend vertically and slowly at a constant speed v. During this process, the pressure sensor 1 continuously detects the force condition of the positioning column 3. When the positioning column 3 contacts the food 6 (the contact point is A 1 ), the pressure sensor 1 can monitor that the force on the positioning column 3 changes significantly. At this time, according to the position where the positioning column 3 descends and the diameter of the spherical heating inner container 5, the height L of the food 6 can be calculated 1 , see Figure 3 . Further, when the height L of the food 6 is obtained 1 , the central position B of the food can be calculated 1 (located at L 1 / 2). At this time, control the electrode column 4 to descend vertically so that its discharge end 41 coincides with B 1 , see Figure 4 .

[0108] When the discharge end 41 of the electrode column 4 coincides with the central position B of the food 1 , connect the positive and negative power supplies. At this time, the current flows from the discharge end 41 of the electrode column 4 through the food 6 to the spherical heating inner container 5, and cooking starts under the preset electric voltage U and the preset cooking duration.

[0109] During the cooking process, there are three situations for the volume change of the food 6: (1) the volume of the food 6 increases due to heat absorption and water expansion; (2) the volume of the food 6 decreases due to evaporation and water loss; (3) the volume change of the food 6 is not obvious. When the volume of the food 6 changes, taking volume expansion as an example, see Figure 5 , the positioning column 3 rises as the volume of the food 6 increases, and the contact point with the food 6 rises from the original A 1 to A 2 . At this time, according to the new food height L 2 , the new food center B 2 (located at L 2 / 2) can be calculated. At this time, the discharge end 41 of the electrode column 4 automatically rises to coincide with B 2 , and continue cooking.

[0110] Before reaching the preset cooking time, whenever the volume of the food 6 changes, the positioning column 3 and the electrode column 4 will make corresponding adjustments accordingly, ensuring that the discharge end 41 is always dynamically and continuously located at the center B of the food. 2 , if the volume of the food 6 no longer changes, the position of the discharge end 41 will also no longer change until the cooking time is reached, and then the cooking ends. For the control process, see Figure 8 .

[0111] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0112] Based on the same inventive concept, the embodiments of the present application also provide an ohmic heating control device for implementing the above-mentioned ohmic heating control method. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the ohmic heating control device provided below can refer to the limitations on the ohmic heating control method in the above text, and will not be repeated here.

[0113] According to an embodiment of the present invention, on the other hand, there is also provided an ohmic heating control device for executing the ohmic heating control method, including:

[0114] A height acquisition module for acquiring the height of the food 6 in the ohmic heating device and calculating the corresponding food center position;

[0115] A lifting module for controlling and adjusting the device to lift and lower the electrode column 4 according to the height of the food 6 in the ohmic heating device.

[0116] The ohmic heating control device acquires the height of the food 6 in the ohmic heating device through the height acquisition module, calculates the food center position according to the height of the food 6, and then controls the lifting and lowering of the electrode column 4 so that the discharge end 41 of the electrode column 4 is continuously located at the center position of the food, ensuring continuous and uniform heating of the food 6.

[0117] Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An ohmic heating device, characterized in that: include: A heating pot (5) suitable for placing food (6); An electrode column (4), wherein one of the electrode column (4) and the heating inner container (5) is positively charged, and the other is negatively charged; An adjusting device is drivingly connected to the electrode column (4) and is suitable for adjusting the relative position between the discharge end (41) of the electrode column (4) and the food (6).

2. The ohmic heating device according to claim 1, characterized in that: It also comprises a positioning column (3), wherein the positioning column (3) is nested on the outside of the electrode column (4), and the electrode column (4) is capable of moving along the axial direction of the positioning column (3).

3. The ohmic heating device according to claim 2, characterized in that: The regulating device comprises: Lifting frame; A pressure sensor (1) is arranged on the lifting frame and is used to monitor the force change of the positioning column (3); An elastic mechanism (2), wherein the positioning column (3) is arranged at the lower end of the pressure sensor (1) through the elastic mechanism (2); the elastic mechanism (2) has a first state in which it is extended under the gravity of the positioning column (3) and the electrode column (4), and a second state in which the elastic mechanism (2) is deformed after the positioning column (3) contacts the food (6); A first driving mechanism is connected to the lifting frame and is adapted to drive the positioning column (3) to move towards or away from the food (6); The second driving mechanism is in driving connection with the electrode column (4) so ​​as to drive the electrode column (4) to move relative to the positioning column (3).

4. The ohmic heating device according to claim 3, characterized in that: The inner side of the heating liner (5) is provided with a scale, and the ohmic heating device also includes an image recognition sensor for monitoring the height of the food (6).

5. The ohmic heating device according to claim 3, characterized in that: The first driving mechanism comprises a motor which is transmission-connected to the positioning column (3).

6. The ohmic heating device according to claim 3, characterized in that: The second driving mechanism comprises an electromagnetic driving mechanism or a motor which is transmission-connected to the electrode column (4).

7. The ohmic heating device according to claim 3, characterized in that: The elastic mechanism (2) comprises a spring, and the spring is arranged between the pressure sensor (1) and the positioning column (3).

8. The ohmic heating device according to claim 3, characterized in that: It also comprises a processor, and the pressure sensor (1), the first driving mechanism and the second driving mechanism are respectively connected to the processor.

9. The ohmic heating device according to any one of claims 1 to 7, characterized in that: The heating inner container (5) is spherical in shape, and the electrode column (4) is arranged in the inner cavity of the heating inner container (5) in a liftable manner.

10. A cooking device, characterized in that: The invention comprises the ohmic heating device according to any one of claims 1 to 9.

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