Door body structure, cooking box and control method

Abstract

The invention provides a door body structure, a cooking box and a control method, the door body structure comprises a door main body, the door main body comprises a frame and glass arranged on the two sides of the frame, and a closed space is defined by the glass and the frame; the supercharging device is arranged in the closed space and provided with an air outlet communicated with the closed space and an air inlet communicated with the outside, when the pressure on the outer sides of the two pieces of glass changes, the pressure in the closed space can be increased through the supercharging device, and therefore the pressure difference borne by the two pieces of glass is changed; and glass explosion caused by too large pressure difference is avoided.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to a door structure, a cooking box and a control method. Background Art

[0002] For some pressure steamers used for steaming rice, the risk of door explosion is low due to the low pressure. In addition, since they use iron doors, they can withstand strong pressure, but this method cannot observe the cooking status.

[0003] In order to facilitate observation of the cooking status, the doors of some cooking boxes are usually designed to be glass. However, when high pressure is generated in the cooking box, the glass door is at risk of exploding due to the impact of the high pressure. Summary of the invention

[0004] In view of this, it is necessary to provide a door structure, a cooking box and a control method to address the above problems.

[0005] The present invention provides a door structure, comprising:

[0006] The door body comprises a frame and glass installed on both sides of the frame, wherein a closed space is enclosed between the glass and the frame; and

[0007] The boosting device is arranged in the closed space and has an air outlet communicated with the closed space and an air inlet communicated with the outside.

[0008] With such an arrangement, when the pressure outside the two glasses changes, the pressure in the enclosed space can be increased by the setting of the booster device, thereby changing the pressure difference between the two glasses and avoiding glass bursting due to excessive pressure difference.

[0009] In one of the embodiments, a first pressure sensor is disposed in the closed space.

[0010] In this way, the first pressure sensor can be used to detect the pressure in the closed space.

[0011] In one embodiment, the pressurizing device is an air pump.

[0012] In one embodiment, the glass includes a first glass and a second glass;

[0013] A handle is provided on the second glass.

[0014] In one embodiment, the frame includes a frame body and a fixing seat protruding from the inner side of the frame body;

[0015] The second glass is provided with an avoidance hole, and the handle passes through the avoidance hole and is fixed to the fixing seat.

[0016] The present invention also provides a cooking box, comprising:

[0017] A cooking box body having a cooking cavity; and

[0018] According to the door structure described in any of the above embodiments, the door structure can be movably connected to the cooking box body.

[0019] In one of the embodiments, a second pressure sensor is provided in the cooking cavity.

[0020] In one embodiment, the cooking box body includes a base, a pot body and a cover body, the base is movably disposed in the cooking cavity, the pot body is disposed on the base, and the cover body is detachably covered on the pot body.

[0021] In one of the embodiments, the cooking box further comprises a guide rail arranged in the cooking cavity, and the base is slidably arranged on the guide rail.

[0022] The present invention also provides a pressure control method for a cooking box, which is applied to a cooking box and comprises the steps of:

[0023] Real-time detection of the pressure P1 in the cooking cavity and real-time detection of the pressure P2 in the closed space;

[0024] Determine whether the pressure difference △P1 between the two sides of the first glass is less than or equal to K△P3, where △P1=|P1-P2|, and K is a constant less than 1;

[0025] When △P1≤K△P3, the booster device does not start;

[0026] When △P1>K△P3, the booster device is started to increase the pressure in the closed space, and the pressure P2 of the closed space is detected;

[0027] When the pressure P2 satisfies △P1≤△P3, and the pressure difference between the two sides of the second glass △P2≤△P4, the pressurizing device is stopped;

[0028] Among them, △P2=|P2-P|; △P3 is the ultimate safety pressure difference of the first glass, △P4 is the ultimate safety pressure difference of the second glass, and P is the atmospheric pressure.

[0029] In one embodiment, K satisfies: 0.5≤K≤0.8.

[0030] In one embodiment, the first glass and the second glass are made of the same material.

[0031] Compared with the prior art, the door body structure in the present application can adjust the pressure in the closed space through the setting of a booster device to change the pressure difference on both sides of the glass in the door body structure, so that the pressure difference on both sides of the glass in the door body structure is always equal to or less than the limit safety pressure difference, thereby effectively avoiding the problem of the door body structure bursting when subjected to pressure shock. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the cooking box in this application;

[0033] Figure 2 It is a cross-sectional schematic diagram of the cooking box in this application;

[0034] Figure 3 This is an exploded diagram of the cooking box in this application.

[0035] Figure numerals: 10, door structure; 11, frame; 111, frame body; 112, fixing seat; 121, first glass; 122, second glass; 123, avoidance hole; 13, handle; 14, air pump; 141, air inlet; 142, air outlet; 21, cooking box body; 211, cooking cavity; 22, base; 23, pot body; 231, heating cavity; 24, cover body; 25, guide rail. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0039] refer to Figures 1 to 3As shown, the present invention provides a door structure, which is used to cover a cavity where high pressure may exist, such as a cooking box.

[0040] For ease of understanding, the door structure will be described below using a cooking box as an example. The cooking box includes a cooking box body 21 and a door structure 10. The cooking box body 21 includes a cooking cavity 211. The door structure 10 is movably connected to the cooking box body 21 to open or close the cooking cavity 211.

[0041] The door structure 10 includes a door body and a pressurizing device arranged in the door body. The door body includes a frame 11 and glass installed on both sides of the frame 11, and the glass and the frame form a closed space. That is, the door body is a structure with double-layer glass, and the two glasses and the frame 11 together form a closed space. The glass and the frame 11 can be fixed by bonding or other methods. It is worth mentioning that the closed space refers to a closed cavity, and when the pressure is increased, the pressure will gradually increase.

[0042] The boosting device is arranged in the closed space, and has an air outlet 142 connected to the closed space and an air inlet 141 connected to the outside. The boosting device is used to adjust the pressure of the closed space. In the initial state, the pressure in the closed space is equal to the atmospheric pressure. When the pressure outside the two glasses changes, the pressure in the closed space can be increased by setting the boosting device, thereby changing the pressure difference between the two glasses, and avoiding the glass bursting due to excessive pressure difference. Specifically, when it is necessary to increase the pressure in the closed space, the boosting device will inhale gas from the air through the air inlet, and press the gas into the closed space through the air outlet to increase the pressure in the closed space. Thus, the pressure difference on both sides of the glass can be adjusted. When it is necessary to release the pressure of the closed space to atmospheric pressure, it can also be done through the pressure relief hole on the frame (not shown). Therefore, by setting the boosting device, the pressure in the closed space can be dynamically adjusted, and the pressure difference on both sides of the glass can be changed. It is understandable that the air inlet may be provided on the frame 11 , and when the supercharging device is not started, the air inlet 141 is not connected to the air outlet 142 , and when the supercharging device is started, the air inlet 141 is connected to the air outlet 142 .

[0043] Specifically, the pressurizing device is an air pump 14, which can pressurize the enclosed space to reach a predetermined pressure in the enclosed space, and adjust the pressure difference on both sides of the glass within a certain range to protect the glass. The air pump 14 can be a high-pressure air pump, and the air pump 14 is controlled to pressurize the enclosed space. The structure for controlling the air pump 14 is not limited here.

[0044] In order to know the pressure state of the enclosed space, a first pressure sensor (not shown) is provided in the enclosed space, and the first pressure sensor can be connected to the boosting device so as to control the boosting device according to the pressure measured by the first pressure sensor. Those skilled in the relevant art should understand that the first pressure sensor can be electrically connected to the boosting device or the air pump through a circuit board or a chip to achieve communication or electrical connection.

[0045] refer to Figures 1 to 3 As shown, the glass includes a first glass 121 and a second glass 122, and a handle 13 is provided on the second glass 122. Specifically, when the door structure 10 is applied to a cooking box, the door structure 10 is used to close the cooking cavity 211 of the cooking box. The first glass 121 in the door structure 10 is the glass close to the cooking cavity 211, that is, the inner glass, and the second glass 122 in the door structure 10 is the glass far from the cooking cavity 211, that is, the outer glass. The handle 13 is provided on the outer glass, so that the user can hold the handle 13 to apply force to rotate the door structure 10.

[0046] In order to better fix the handle 13, the frame 11 includes a frame body 111 and a fixing seat 112 protruding from the inner side of the frame body 111. The second glass 122 is provided with an avoidance hole 123. The handle 13 is fixed to the fixing seat 112 through the avoidance hole 123. The fixed connection between the handle 13 and the fixing seat 112 avoids direct connection between the handle 13 and the second glass 122.

[0047] In this embodiment, there are two glasses in the door body, namely, the first glass 121 and the second glass 122. The first glass 121 and the second glass 122 are made of the same structure, that is, have the same structural characteristics, that is, the first glass and the second glass are both ordinary glass, or the first glass and the second glass are both tempered glass. Therefore, the two glasses have the same characteristics, that is, the pressure difference that the two glasses can withstand is the same. It can be understood that in other embodiments, the two glasses can also be two glasses of different materials, for example, the first glass is ordinary glass and the second glass is tempered glass.

[0048] The door structure 10 of the present application can be applied to a cooking box. The cooking box includes a cooking box body 21 and the above-mentioned door structure 10. The cooking box body 21 has a cooking cavity 211. The door structure 10 can be movably connected to the cooking box body 21 to open or close the cooking cavity 211. Personnel in the relevant field should understand that when the above-mentioned door structure 10 is applied to the cooking box body 21, the second glass 122 is located on the outside to form an outer glass, so that the user can operate the handle 13. That is, the first glass 121 is located on the side close to the cooking cavity 211, and the second glass 122 is located on the side away from the cooking cavity 211.

[0049] Specifically, a second pressure sensor (not shown) is provided in the cooking cavity 211 for real-time monitoring of the pressure in the cooking cavity 211. When the cooking box is in use, in order to avoid excessive pressure difference on both sides of the first glass 121 or the second glass 122, which may cause the glass to explode, the first glass or the second glass may be prevented from exploding by controlling the pressure difference on both sides of the glass. The second pressure sensor is connected to the boosting device so that the boosting device can be controlled according to the pressure measured by the second pressure sensor. Those skilled in the art should understand that the second pressure sensor can be electrically connected or electrically connected to the boosting device or the air pump 14 in a communicative manner by means of a circuit board.

[0050] Furthermore, the pressure difference on both sides of the first glass 121 is the difference between the pressure in the cooking cavity 211 and the pressure in the enclosed space. When the pressure in the cooking cavity 211 increases, the pressure in the enclosed space remains unchanged, which causes the pressure difference on both sides of the first glass 121 to increase. When the pressure difference on both sides of the first glass 121 is greater than the threshold value that the glass can withstand, the first glass 121 is crushed. Similarly, the pressure difference on both sides of the second glass 122 is the difference between the pressure in the enclosed space and the atmospheric pressure. When the pressure in the enclosed space changes, the pressure difference on both sides of the second glass 122 changes. When the pressure change in the enclosed space is too large, the second glass 122 may be crushed.

[0051] refer to Figure 2 and Figure 3 As shown, the cooking box of the present application includes a base 22, a pot body 23 and a cover body 24. The base 22 is movably arranged in the cooking cavity 211, the pot body 23 is arranged on the base 22, and the cover body 24 is detachably covered on the pot body 23. The pot body 23 and the cover body 24 enclose a heating cavity 231 for cooking food. The pot body 23 can be a pressure cooker or a pressure cooker, so that when cooking, the heating cavity 231 in the pot body 23 forms a high-pressure space. However, when the heating cavity 231 in the pot body 23 leaks, the high-pressure gas will enter the cooking cavity, causing the pressure in the cooking cavity to increase instantly, thereby causing the pressure on one side of the first glass 121 to increase. If the pressure in the closed space remains unchanged, the pressure difference on both sides of the first glass 121 will increase instantly. When it is greater than the pressure difference that the first glass 121 withstands, the first glass 121 will burst.

[0052] The pot body 23 is disposed on the base 22, and the base 22 is movably disposed in the cooking cavity, so that when taking out or putting in food, the base 22 is driven to move toward the door structure to approach the cavity opening of the cooking cavity, so as to facilitate taking out or putting food into the pot body 23. During the cooking process, the base 22 is driven to move toward the direction away from the door structure to stay away from the cavity opening of the cooking cavity.

[0053] Specifically, as shown in the reference figure, the cooking box body also includes a guide rail 25 arranged in the cooking cavity, and the base 22 is slidably arranged on the guide rail 25 to guide the base 22 to move along the laying direction of the guide rail during the sliding process of the base 22, which is more convenient for users to operate.

[0054] The present application also provides a cooking box pressure control method to prevent the glass of the door body from exploding when the pressure in the cooking chamber is abnormal, thereby improving the safety performance of the cooking box. The cooking box pressure control method is applied to the above-mentioned cooking box. The pressure in the chamber is set to P1, the pressure in the closed space is set to P2, the limit safety pressure difference of the first glass 121 is △P3, the limit safety pressure difference of the second glass 122 is △P4, the pressure difference of the first glass 121 is △P1, and the pressure difference of the second glass 122 is △P2. Specifically, the cooking box pressure control method includes the steps of:

[0055] S1, real-time detection of the pressure P1 in the cooking cavity and real-time detection of the pressure P2 in the closed space;

[0056] S2, determining whether the pressure difference ΔP1 on both sides of the first glass 121 is less than or equal to KΔP3, where ΔP1=|P1-P2|, and K is a constant less than 1;

[0057] When △P1≤K△P3, the booster device does not start;

[0058] When △P1>K△P3, the booster device is started to increase the pressure in the closed space, and the pressure P2 of the closed space is detected;

[0059] When the pressure P2 satisfies △P1≤△P3, and the pressure difference △P2≤△P4 on both sides of the second glass 122, the pressurizing device is stopped;

[0060] Among them, △P2=|P2-P|; △P3 is the ultimate safety pressure difference, and P is the atmospheric pressure.

[0061] In one embodiment, K satisfies: 0.5≤K≤0.8.

[0062] In step S1 , the pressure P1 in the cooking cavity may be monitored in real time by the second pressure sensor, and the pressure P2 in the closed space may be monitored in real time by the first pressure sensor.

[0063] In step S2, it is necessary to first determine whether the pressure difference on both sides of the first glass 121 is abnormal, that is, to determine whether the pressure difference △P1 on both sides of the first glass 121 is less than or equal to K△P3, wherein △P1=|P1-P2|, K is a constant less than 1, so as to distinguish whether the pressure in the cooking chamber is abnormal.

[0064] When the pressure in the cooking cavity is normal, that is, △P1≤K△P3, the booster device is not started, that is, the air pump is not started. Since △P3 is the maximum pressure difference that the glass can withstand, when △P1≤K△P3, the first glass 121 will not burst due to the increase in pressure difference. Similarly, the pressure difference △P2 on both sides of the second glass 122 is 0. Since the outside of the second glass 122 is atmospheric pressure, when the booster device is not started, the pressure in the closed space is also atmospheric pressure, so the second glass 122 will not burst.

[0065] When the pressure in the cooking cavity is in an abnormal state, that is, △P1 is greater than K△P3, the booster device is activated. At this time, since the pressure in the cooking cavity is in an abnormal state, that is, the pressure in the cooking cavity rises, the activation of the booster device will pressurize the enclosed space, that is, the pressure in the enclosed space will also rise. The pressure value in the current state can be obtained through the first pressure sensor and the second pressure sensor, that is, the pressure in the cooking cavity is P1, and the pressure in the enclosed space is P2. For the first glass 121, it needs to satisfy △P1=|P1-P2|≤△P3. At this time, the first glass 121 will not burst. For the second glass 122, since the pressure in the enclosed space rises, while the atmospheric pressure on the other side remains unchanged, the pressure in the enclosed space needs to satisfy: △P2≤△P4, then the second glass 122 will not burst.

[0066] In other words, the pressurizing device needs to increase the pressure in the closed space to P2. When P2 satisfies △P1=|P1-P2|≤△P3 and △P2≤△P4, the pressurizing is stopped. At this time, the first glass 121 and the second glass 122 can be protected at the same time.

[0067] In order to better protect the glass, in this application, K can be 0.5 to 0.8. On the one hand, to avoid K value being too small, causing the booster to start frequently, even in normal state; on the other hand, to avoid K value being too large, causing the booster to start too late.

[0068] It is worth mentioning that, in other embodiments of the present application, the first glass 121 and the second glass 122 are made of the same material, that is, the first glass 121 and the second glass 122 have the same ultimate safety pressure difference, that is, ΔP3=ΔP4.

[0069] In order to more clearly illustrate the principle of pressurization of the booster device in the present application, the first glass 121 and the second glass 122 are made of the same material, that is, the first glass 121 and the second glass 122 have the same ultimate safety pressure difference. The pressure in the cavity is set to P1, the pressure in the closed space is set to P2, the ultimate safety pressure difference between the first glass 121 and the second glass 122 is △P3, the ultimate safety pressure difference between the second glass 122 is △P4, the pressure difference of the first glass 121 is △P1, the pressure difference of the second glass 122 is △P2, the atmospheric pressure is P, and the pressure of the closed cavity when pressurized is P (the pressure in the closed cavity is normalized to be equal to the atmospheric pressure). Specifically, the pressure control method of the cooking box includes the steps of:

[0070] S1, real-time detection of the pressure P1 in the cooking chamber;

[0071] S2, determining whether the pressure difference ΔP1 on both sides of the first glass 121 is less than or equal to KΔP3, where ΔP1=|P1-P|, and K is a constant less than 1;

[0072] When △P1≤K△P3, the booster device does not start;

[0073] When △P1>K△P3, the booster device is started to increase the pressure in the closed space, and the pressure P2 of the closed space is detected;

[0074] When the pressure P2 satisfies △P1=|P1-P2|≤△P3, and the pressure difference △P2 on both sides of the second glass 122 ≤△P4, the pressurizing device is stopped;

[0075] Among them, △P2=|P2-P|; △P3 is the ultimate safety pressure difference, and P is the atmospheric pressure.

[0076] When the pressure in the cooking cavity is in an abnormal state, that is, △P1 is greater than K△P3, the booster device is activated to increase the pressure of the closed space. At this time, since the pressure in the cooking cavity is in an abnormal state, that is, the pressure in the cooking cavity rises, the activation of the booster device will increase the pressure of the closed space, that is, the pressure of the closed space will also rise, and the pressure in the closed space will be P2. For the first glass 121, it needs to satisfy △P1=|P1-P2|≤△P3, at this time, the first glass 121 will not burst. For the second glass 122, since the pressure in the closed space rises, while the atmospheric pressure on the other side remains unchanged, the pressure in the closed space needs to satisfy: △P2≤△P3, at this time, the second glass 122 will not burst.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A door structure, characterized in that: include: The door body comprises a frame and glass installed on both sides of the frame, wherein a closed space is enclosed between the glass and the frame; and The boosting device is arranged in the closed space and has an air outlet communicated with the closed space and an air inlet communicated with the outside.

2. The door structure according to claim 1, characterized in that: A first pressure sensor is arranged in the closed space.

3. The door structure according to claim 2, characterized in that: The pressurizing device is an air pump.

4. The door structure according to claim 1, characterized in that: The glass comprises a first glass and a second glass which are opposite to each other; The second glass is provided with a handle.

5. The door structure according to claim 4, characterized in that: The frame includes a frame body and a fixing seat protruding from the inner side of the frame body; The second glass is provided with an avoidance hole, and the handle passes through the avoidance hole and is fixed to the fixing seat.

6. A cooking box, characterized in that: include: The cooking box body has a cooking cavity; as well as According to the door structure according to any one of claims 1 to 5, the door structure can be movably connected to the cooking box body.

7. The cooking box according to claim 6, characterized in that: A second pressure sensor is arranged in the cooking cavity.

8. The cooking box according to claim 6, characterized in that: The cooking box further comprises a base, a pot body and a cover body, wherein the base is movably arranged in the cooking cavity, the pot body is arranged on the base, and the cover body is detachably arranged on the pot body.

9. The cooking box according to claim 8, characterized in that: The cooking box body also includes a guide rail arranged in the cooking cavity, and the base is slidably arranged on the guide rail.

10. A pressure control method for a cooking box, applied to a cooking box, characterized in that: Includes steps: Real-time detection of the pressure P1 in the cooking cavity and real-time detection of the pressure P2 in the closed space; Determine whether the pressure difference △P1 on both sides of the first glass is less than or equal to K△P3, where △P1=|P1-P2|, and K is a constant less than 1; When △P1≤K△P3, the booster device does not start; When △P1>K△P3, the booster device is started to increase the pressure in the closed space, and the pressure P2 of the closed space is detected; When the pressure P2 satisfies △P1≤△P3, and the pressure difference between the two sides of the second glass △P2≤△P4, the pressurizing device is stopped; Among them, △P2=|P2-P|; △P3 is the ultimate safety pressure difference of the first glass, △P4 is the ultimate safety pressure difference of the second glass, and P is the atmospheric pressure.

11. The pressure control method according to claim 10, characterized in that: The constant K satisfies: 0.5≤K≤0.

8.

12. The pressure control method according to claim 10, characterized in that: The first glass and the second glass are made of the same material.

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