Cover structure and cooking device

Abstract

The utility model discloses a cover structure and a cooking device. The cover structure includes a cover body, a heating element, a strain sensor and a control module; the cover body is provided with a ventilation channel; the heating element is provided on the cover body; the strain sensor is installed in the ventilation channel and is electrically connected to the heating element. The technical solution of the utility model can achieve the effect of automatically controlling the heating element to heat and reduce the condensed water on the cover body.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking, in particular to a cover structure and a cooking device using the cover structure. Background Art

[0002] Traditional cooking devices usually only have a heating element at the bottom, which makes the bottom temperature of the cooking device higher and the top cover temperature lower. As a result, when the steam generated during the cooking process touches the top cover, condensation water will be produced. Under the action of gravity, the condensation water will easily fall back into the cooking cavity of the cooking device, thereby affecting the cooking taste of the food. Utility Model Content

[0003] The main purpose of the utility model is to provide a control method for a cooking device, aiming to improve the problem that condensed water is easily generated on the cover of the cooking device.

[0004] To achieve the above-mentioned purpose, the cover structure proposed in the utility model includes a cover body, a heating element, a strain sensor and a control module; the cover body is provided with a ventilation channel; the heating element is arranged on the cover body; the strain sensor is installed in the ventilation channel; the heating element and the strain sensor are both electrically connected to the control module.

[0005] In one embodiment, the cover structure further includes a fixing ring, the fixing ring is fixedly disposed in the ventilation channel and communicated with the ventilation channel, and the strain sensor is mounted on the fixing ring.

[0006] In one embodiment, the fixing ring comprises:

[0007] a ring body; and

[0008] A connecting beam passes through the center of the ring body, and two ends of the connecting beam are respectively connected to two opposite sides of the ring body. The strain sensor is installed on a side of the connecting beam away from the outlet of the ventilation channel, and a gap is set between the connecting beam and the strain sensor.

[0009] In one embodiment, at least two connecting beams are provided, and at least two connecting beams are cross-arranged.

[0010] In one embodiment, a groove is formed on a side of the connecting beam facing away from the ventilation channel, and the strain sensor is installed in the groove with a gap formed between the strain sensor and the bottom wall of the groove.

[0011] In one embodiment, the ring body has a vent hole communicating with the vent channel, and the groove is communicated with the vent hole.

[0012] In one embodiment, the cover structure further comprises a support grid, and the support grid is arranged on a side of the strain sensor facing the outlet of the ventilation channel.

[0013] In one embodiment, a gap is provided between the support grid and the strain sensor.

[0014] In one embodiment, the cover structure further includes a light emitting element, which is disposed on a side of the cover body away from the heating element and is electrically connected to the strain sensor.

[0015] In one embodiment, the cover structure further includes a transparent upper cover, and the transparent upper cover covers the light emitting element.

[0016] In one embodiment, the strain sensor comprises:

[0017] Basal layer;

[0018] A strain resistor, wherein the strain resistor is disposed on the base layer; and

[0019] Lead wires, wherein two lead wires are provided, and the two lead wires are respectively connected to two ends of the strain resistor.

[0020] The utility model also provides a cooking device, comprising a cooking container and the above-mentioned cover structure, wherein the cover structure covers the opening of the cooking container.

[0021] The technical solution of the utility model is to provide a ventilation channel on the cover body so that water vapor can be discharged from the ventilation channel to avoid excessive air pressure in the cooking cavity of the cooking device using the cover structure. By providing a heating element on the cover body, the condensed water on the cover body can be heated by putting the heating element in a heating state, so that the condensed water is heated to form water vapor and then discharged from the ventilation channel. In addition, by providing a strain sensor in the ventilation channel, and the strain sensor and the heating element are both electrically connected to the control module, the strain sensor can be deformed in the exhaust direction of the ventilation channel under the pressure difference of the water vapor and the external pressure of the cover structure, and then the strain sensor transmits the deformation signal to the control module, and the control module then transmits the signal to the heating element and controls the heating element to work, so as to achieve the effect of automatically controlling the heating element to heat the cover body and reduce the condensed water on the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 This is a front structural schematic diagram of an embodiment of the cover structure of the utility model;

[0024] Figure 2 This is a structural schematic diagram of an embodiment of the cover structure of the utility model when the heating element is exposed from the back;

[0025] Figure 3 It is a structural schematic diagram of an example of an assembled fixed ring and a strain sensor in the ventilation channel of the cover structure of the utility model;

[0026] Figure 4 It is a structural schematic diagram of another example of the assembly of the fixing ring and the strain sensor in the ventilation channel of the cover structure of the utility model;

[0027] Figure 5 It is a cross-sectional view of the assembled fixing ring, strain sensor and support grid in the ventilation channel of the cover structure of the utility model;

[0028] Figure 6 It is a structural schematic diagram of an embodiment of a strain sensor in the cover structure of the utility model;

[0029] Figure 7 It is a structural schematic diagram of an embodiment of a support grid in the cover structure of the utility model.

[0030] Description of Figure Numbers:

[0031] Label name Label name 100 Cover body 200 Heating element 300 Strain Sensors 310 Basal layer 320 Strain Resistor 330 lead 340 Protective film 400 Retaining ring 410 Ring body 420 Connecting beam 421 Grooves 401 Ventilation holes 500 Support grille 510 Grille 520 Steam channel 600 Light-emitting components 700 Transparent cover 800 Sealing ring 900 Thermostat 101 Ventilation channel

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0036] The cooking device in the related art usually only has a heating element at the bottom, which makes the bottom temperature of the cooking device higher and the temperature of the top cover lower. As a result, when the steam generated during the cooking process touches the top cover, condensation water will be generated. Under the action of gravity, the condensation water will easily fall back into the cooking cavity of the cooking device, thereby affecting the cooking taste of the food.

[0037] Based on the above problems, the utility model proposes a cover structure. Figures 1 to 4 In one embodiment of the present application, the cover structure includes a cover body 100, a heating element 200, a strain sensor 300 and a control module (not shown); a ventilation channel 101 is provided on the cover body 100; the heating element 200 is provided on the cover body 100; the strain sensor 300 is installed in the ventilation channel 101; the strain sensor 300 and the heating element 200 are both electrically connected to the control module.

[0038] The cover structure is applied to a cooking device, which includes a cooking container. The cover structure is used to cover the opening of the cooking container so that the food is well sealed in the cooking container to achieve higher cooking efficiency. The cover body 100 of the cover structure is the main component for covering the cooking container. The cover body 100 is provided with a ventilation channel 101, so that the water vapor generated by the cooking device using the cover structure when cooking food can be discharged from the ventilation channel 101 to avoid excessive air pressure in the cooking container. In one example, an exhaust valve can be provided in the ventilation channel 101. When the air pressure in the cooking container reaches a preset air pressure value, the exhaust valve opens the ventilation channel 101; when the air pressure in the cooking container is lower than the preset air pressure value, the exhaust valve can close the ventilation channel 101.

[0039] The cover structure also includes a heating element 200, which is arranged on the cover body 100, so that the cover body 100 can be heated to reduce the condensed water generated on the cover body 100. The heating element 200 can be a resistance wire heating element 200, an electromagnetic heating element 200 or an infrared heating element 200. A strain sensor 300 is also provided in the ventilation channel 101. When water vapor passes through the ventilation channel 101, the strain sensor 300 can be deformed toward the outside of the cover structure (i.e., the exhaust direction of the ventilation channel 101) under the action of the pressure difference between the water vapor and the outside of the cover structure. By electrically connecting the strain sensor 300 and the heating element 200 to the control module, the strain sensor 300 sends the deformation signal to the control module after the deformation occurs, and the control module transmits the signal to the heating element 200, and controls the heating element 200 to switch to the working state to heat the cover body 100, thereby eliminating the condensed water on the cover body 100. Of course, in order to save energy, the heating element 200 can be controlled to heat only when the deformation amount of the strain sensor 300 exceeds the preset deformation amount. When the deformation amount of the strain sensor 300 is lower than the preset deformation amount, the heating element 200 can be controlled to maintain the initial state. Alternatively, when the deformation amount of the strain sensor 300 exceeds the preset deformation amount, and as the deformation amount of the strain sensor 300 gradually increases, the heating power of the heating element 200 can be controlled to gradually increase, so as to effectively reduce the condensed water on the cover body 100.

[0040] Specifically, in one example, Figure 6As shown, the strain sensor 300 may include a base layer 310, a strain resistor 320 and two leads 330, wherein the strain resistor 320 is disposed on the base layer 310, and the two ends of the strain resistor 320 are respectively connected to the two leads 330, and the two leads 330 are respectively connected to an external power source through wires. The strain resistor 320 may be a resistance wire or a metal foil, which is easily deformed under the action of an external force. According to R=ρ*l / S, where R is resistance, ρ is resistivity, l is length, and S is cross-sectional area, when the outside world applies axial tension to the strain sensor 300, the resistor 310 is deformed, that is, the length of the resistor 310 will increase, and the cross-sectional area will decrease. At the same time, the resistivity will also change due to the influence of factors such as lattice changes, thereby causing a change in the resistance value, then △R / R=△l / l-△S / S+△ρ / ρ. After the strain sensor 300 is deformed, its own resistance value will change, thereby causing the resistance value and power value of the external circuit to which it is connected (i.e., the circuit that applies voltage to the strain sensor 300) to change. When the resistance value or power value of the external circuit to which it is connected is detected to change, it means that steam passes through the ventilation channel 101, and there may be condensed water on the cover body 100, so the heating element 200 is controlled to heat to reduce the condensed water on the cover body 100. Of course, in other examples, in order to better insulate and protect the strain resistor 320, the strain sensor 300 may also include a protective film 340, which covers the side of the strain resistor 320 away from the base layer 310. Specifically, when the strain sensor 300 needs to be installed in the ventilation channel 101, the strain sensor 300 can be connected to the inner wall of the ventilation channel 101 by bonding, welding or riveting the edge of its base layer 310, or connected to the inner side wall of the groove 421 of the fixing ring 400 installed in the ventilation channel 101. Alternatively, the strain sensor 300 also includes a support ring connected to the edge of the base layer 310, the support ring and the base layer 310 are arranged at an angle, and the support ring is clamped, bonded or welded to the inner wall of the ventilation channel 101; or the support ring and the fixing ring 400 are bonded, clamped, riveted, threaded or welded to the side facing the cooking cavity.

[0041] The technical solution of the utility model is to provide a ventilation channel 101 on the cover body 100, so that water vapor can be discharged from the ventilation channel 101 to avoid excessive gas pressure in the cooking cavity of the cooking device using the cover structure. By providing a heating element 200 on the cover body 100, the condensed water on the cover body 100 can be heated by putting the heating element 200 in a heating state, so that the condensed water is heated to form water vapor and then discharged from the ventilation channel 101. In addition, by providing a strain sensor 300 in the ventilation channel 101, and the strain sensor 300 and the heating element 200 are both electrically connected to the control module, the strain sensor 300 can be deformed in the exhaust direction of the ventilation channel 101 under the pressure difference of the water vapor and the pressure outside the cover structure, and then the strain sensor transmits the deformation signal to the control module, and the control module then transmits the signal to the heating element 200, and controls the heating element 200 to work, so as to achieve the effect of automatically controlling the heating element 200 to heat the cover body 100 and reduce the condensed water on the cover body 100.

[0042] Further, please refer to Figures 2 to 4 The cover structure further includes a fixing ring 400 , which is fixed in the ventilation channel 101 and communicates with the ventilation channel 101 , and the strain sensor 300 is mounted on the fixing ring 400 .

[0043] Specifically, the fixing ring 400 may be circular, rectangular or other closed shapes, as long as the fixing ring 400 can be connected to the ventilation channel 101. It should be noted that the fixing ring 400 is fixedly arranged in the ventilation channel 101, including the fixing ring 400 being fixedly arranged at the inlet of the ventilation channel 101, at the outlet of the ventilation channel 101, or between the inlet and outlet of the ventilation channel 101.

[0044] By fixing the fixing ring 400 in the ventilation channel 101 and communicating with the ventilation channel 101, it is ensured that water vapor can pass through the fixing ring 400 and be discharged from the ventilation channel 101. By installing the strain sensor 300 on the fixing ring 400, the fixing ring 400 provides a better support for the installation of the strain sensor 300, thereby preventing the strain sensor 300 from falling.

[0045] In one example, if Figure 3 or Figure 4 As shown, the fixing ring 400 includes a ring body 410 and a connecting beam 420, the two ends of the connecting beam 420 are respectively connected to the opposite sides of the ring body 410 and pass through the center of the ring body 410, and the strain sensor 300 is installed on the side of the connecting beam 420 away from the outlet of the ventilation channel 101, and a gap is provided between the connecting beam 420.

[0046] By connecting the two ends of the connecting beam 420 to the opposite sides of the ring body 410 and passing through the center of the ring body 410, and installing the strain sensor 300 on the side of the connecting beam 420 away from the outlet of the ventilation channel 101, on the one hand, the connecting beam 420 can strengthen the strength of the fixing ring 400, and on the other hand, it can provide an installation basis for the installation of the strain sensor 300, and enable the strain sensor 300 to better correspond to the ventilation channel 101, so as to more sensitively sense the pressure given by water vapor. In addition, by providing a gap between the strain sensor 300 and the side of the connecting beam 420 away from the outlet of the ventilation channel 101, the gap can provide an avoidance space for the strain sensor 300 to deform, so that the strain sensor 300 can give an effective signal to the heating element 200, so that the heating element 200 heats the cover body 100 at the appropriate time, and effectively reduces the condensed water on the cover body 100 in a timely manner.

[0047] Furthermore, if Figure 4 As shown, there are at least two connecting beams 420, and the at least two connecting beams 420 are cross-arranged.

[0048] By providing two connecting beams 420, and the two connecting beams 420 are cross-arranged, the strength of the fixing ring 400 is enhanced, and the deformation of the connecting beams 420 when subjected to the pressure of water vapor is reduced. Specifically, the strain sensor 300 can be arranged on any one of the connecting beams 420. Alternatively, it can be arranged at the intersection of at least two connecting beams 420, so that the strain sensor 300 is closer to the middle of the fixing ring 400, so as to have a more sensitive sensing effect.

[0049] Furthermore, if Figure 5 As shown, a groove 421 is formed on one side of the connecting beam 420 away from the ventilation channel 101 , and the strain sensor 300 is installed in the groove 421 with a gap between the strain sensor 300 and the bottom wall of the groove 421 .

[0050] By providing a groove 421 on the side of the connecting beam 420 away from the ventilation channel 101, and installing the strain sensor 300 in the groove 421, the installation space of the strain sensor 300 and the fixing ring 400 as a whole can be reduced. By providing a gap between the strain sensor 300 and the bottom wall of the groove 421, the strain sensor 300 has sufficient deformation space when deforming toward the bottom wall of the groove 421.

[0051] Further, please refer to Figures 3 to 5It can be understood that the fixing ring 400 has a vent hole 401 for communicating with the ventilation channel 101, and the groove 421 can be communicated with the vent hole 401. In this way, after the airflow passing through the strain sensor 300 enters the groove 421, it can further enter the ventilation channel 101 through the vent hole 401 and then be discharged from the outlet of the ventilation channel 101, thereby reducing the risk of steam remaining in the groove 421 and affecting the deformation of the strain sensor 300.

[0052] In one example, if Figure 5 As shown, a support grid 500 is also installed in the ventilation channel 101 , and the support grid 500 is arranged on a side of the strain sensor 300 facing the outlet of the ventilation channel 101 .

[0053] By setting the strain sensor 300 on the side facing the outlet of the ventilation channel 101, when the strain sensor 300 is deformed toward the outlet of the ventilation channel 101, the support grid 500 can not only allow the strain sensor 300 to deform, but also provide better support for the strain sensor 300, thereby reducing the risk of the strain sensor 300 being broken due to excessive deformation.

[0054] For details, please refer to Figures 5 to 7 The support grid 500 may include a grid portion 510 and a steam channel 520, and the grid portion 510 and the steam channel 520 are arranged alternately. The grid portion 510 is in a grid shape, so the strain sensor 300 can be supported by the grid portion 510 when it is deformed, and can be deformed through the mesh of the grid portion 510. In addition, the support grid 500 is also provided with a steam channel 520, and the steam channel 520 can allow airflow to pass through.

[0055] Furthermore, if Figure 5 As shown, in combination with the solution that the strain sensor 300 is arranged on the fixing ring 400 and is located in the groove 421 of the connecting beam 420 of the fixing ring 400, the supporting grid 500 is also arranged in the groove 421, and a gap is provided between the supporting grid 500 and the bottom wall of the groove 421. In this arrangement, the steam passing through the supporting grid 500 can enter the groove 421, and under the condition that the groove 421 is connected to the vent hole 401 of the fixing ring 400, the steam in the groove 421 can be discharged into the ventilation channel 101 through the vent hole 401, and discharged from the outlet of the ventilation channel 101, thereby reducing the risk of steam accumulation in the groove 421.

[0056] Furthermore, a gap is provided between the support grid 500 and the strain sensor 300 .

[0057] By providing a gap between the support grid 500 and the strain sensor 300 , the deformation space of the strain sensor 300 can be increased, and the degree of restriction of the support grid 500 on the deformation of the strain sensor 300 can be reduced.

[0058] In one example, if Figure 5 As shown, the cover structure further includes a light emitting element 600 , which is disposed on a side of the cover body 100 away from the heating element 200 and is electrically connected to the strain sensor 300 .

[0059] Specifically, the light emitting element 600 can be connected in series or in parallel with the strain gauge. When the light emitting element 600 is connected in series with the strain sensor 300, the light emitting brightness of the light emitting element 600 can change with the different deformation degrees of the strain sensor 300. When the light emitting element 600 is connected in parallel with the strain sensor 300, the light emitting brightness of the light emitting element 600 can also change according to the different deformation degrees of the strain sensor 300.

[0060] By providing the light emitting element 600 and electrically connecting the light emitting element 600 to the strain sensor 300, when the strain sensor 300 is deformed, the light emitting element 600 can be controlled to emit light or the light emission degree of the light emitting element 600 can be controlled, thereby providing an obvious reminder effect to the user.

[0061] Furthermore, if Figure 5 As shown, the cover structure further includes a transparent upper cover 700 , and the transparent upper cover 700 covers the light emitting element 600 .

[0062] By providing a transparent upper cover 700, and the transparent upper cover 700 covers the light emitting element 600, the transparent upper cover 700 can have a good protective effect on the light emitting element 600 on the one hand, and on the other hand, it can help the user observe the light emitting state of the light emitting element 600 to achieve a better effect of reminding the user.

[0063] In one example, if Figure 1 or Figure 2 As shown, the cover structure further includes a thermostat 900 and an exhaust valve (not shown), and the thermostat 900 is electrically connected to the exhaust valve.

[0064] The thermostat 900 is used to detect the temperature in the cooking container of the cooking device using the cover structure. When the thermostat 900 detects that the temperature in the cooking container is too high, it can control the exhaust valve to open to release some steam to achieve the effect of adjusting the temperature, so as to achieve the effect of flexibly adjusting the cooking temperature of the food or keeping the food warm after cooking.

[0065] The utility model also provides a cooking device, which includes a cooking container and a cover structure. The specific structure of the cover structure refers to the above embodiments. Since the cooking device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the cover structure covers the opening of the cooking container, so that when the cooking device is in a cooking state, the cooking efficiency can be improved and the risk of food bursting out of the cooking container can be reduced.

[0066] Furthermore, a sealing ring 800 may be provided between the cover structure and the cooking container, thereby improving the sealing performance when the cover structure covers the cooking container, and further improving the cooking efficiency.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cover structure, characterized in that: include: A cover body, wherein the cover body is provided with a ventilation channel; A heating element, wherein the heating element is disposed on the cover body; a strain sensor, the strain sensor being installed in the ventilation passage; as well as A control module, the heating element and the strain sensor are both electrically connected to the control module.

2. The cover structure according to claim 1, characterized in that: The cover structure further includes a fixing ring, which is fixed in the ventilation channel and communicates with the ventilation channel, and the strain sensor is mounted on the fixing ring.

3. The cover structure according to claim 2, characterized in that: The fixing ring comprises: a ring body; and A connecting beam passes through the center of the ring body, and two ends of the connecting beam are respectively connected to two opposite sides of the ring body. The strain sensor is installed on a side of the connecting beam away from the outlet of the ventilation channel, and a gap is set between the connecting beam and the strain sensor.

4. The cover structure according to claim 3, characterized in that: There are at least two connecting beams, and at least two connecting beams are cross-arranged.

5. The cover structure according to claim 3, characterized in that: A groove is formed on one side of the connecting beam away from the ventilation channel. The strain sensor is installed in the groove and a gap is formed between the strain sensor and the bottom wall of the groove.

6. The cover structure according to claim 5, characterized in that: The ring body has a vent hole communicating with the vent channel, and the groove is communicated with the vent hole.

7. The cover structure according to any one of claims 1 to 6, characterized in that: The cover structure further includes a support grid, and the support grid is arranged on a side of the strain sensor facing the outlet of the ventilation channel.

8. The cover structure according to claim 7, characterized in that: A gap is provided between the support grid and the strain sensor.

9. The cover structure according to any one of claims 1 to 6, characterized in that: The cover structure further includes a light emitting element, which is disposed on a side of the cover body away from the heating element and is electrically connected to the strain sensor.

10. The cover structure according to claim 9, characterized in that: The cover structure further comprises a transparent upper cover, and the transparent upper cover covers the light emitting element.

11. The cover structure according to any one of claims 1 to 6, characterized in that: The strain sensor comprises: basal layer; A strain resistor, wherein the strain resistor is disposed on the base layer; and Lead wires, wherein two lead wires are provided, and the two lead wires are respectively connected to two ends of the strain resistor.

12. A cooking device, characterized in that: The invention comprises a cooking container and a cover structure as claimed in any one of claims 1 to 11, wherein the cover structure covers an opening of the cooking container.

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