Automatic exhaust closing method and system for range hood

Abstract

The invention discloses an automatic exhaust closing method and system for a range hood, and the method comprises the following steps: dividing the height between a cooking bench of an integrated stove and a smoke outlet of the range hood into a plurality of height intervals, obtaining the temperature data of each height interval, and taking a preset temperature threshold value as a judgment standard, whether flames exist or not is checked one by one from low to high. Once the temperature exceeds the height interval of the preset temperature threshold value, it is judged that flames exist on the cooking bench of the integrated stove, the number of the intervals is counted to estimate the height of the flames, the estimated flame height is compared with the height between the cooking bench of the integrated stove and the smoke outlet of the range hood, and if the flame height reaches or exceeds the height of the smoke outlet, the range hood is started. And immediately turning off the smoke exhaust switch of the range hood. The problems that in an existing family kitchen environment, once flames on a cooking bench of the integrated cooker are out of control, high temperature and fire are prone to spreading to a range hood, the flames may enter a flue through a smoke outlet of the range hood, and therefore the fire is increased are solved.

Description

Technical Field

[0001] The invention relates to the technical field of range hood control, and in particular to a range hood automatic exhaust closing method and system. Background Art

[0002] In the modern family kitchen environment, the integrated stove is the core equipment for cooking, and its safety and stability are directly related to the safety of life and property of family members. However, kitchen fire accidents occur from time to time, among which accidental fire on the integrated stove is one of the main sources of fire. When the integrated stove causes a fire due to improper operation, grease overflow or gas leakage during use, the flame tends to rise rapidly and expand its scope of influence. Since the range hood is usually installed above the integrated stove to effectively remove the fumes and harmful gases generated during the cooking process, this layout improves the quality of the kitchen environment while also posing the risk of rapid spread of fire. Once the flame on the integrated stove is out of control, its high temperature and fire can easily spread to the range hood, and the flame may enter the flue through the exhaust port of the range hood. As a channel for the discharge of kitchen fumes, the flue often accumulates a large amount of oil and flammable substances inside. Once ignited, the fire will spread rapidly in the flue, forming a three-dimensional fire that is difficult to control. Summary of the invention

[0003] In view of the above-mentioned defects, the present invention proposes a method and system for automatically shutting off exhaust of a range hood, aiming to solve the problem that in the existing home kitchen environment, once the flame on the integrated stove top gets out of control, its high temperature and fire can easily spread to the range hood, and the flame may enter the flue through the range hood exhaust port, thereby increasing the fire.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A method for automatically closing exhaust of a range hood, comprising the following steps:

[0006] Step S1: obtaining the height between the integrated stove top and the smoke exhaust port of the range hood, and dividing the height between the integrated stove top and the smoke exhaust port of the range hood into several equal parts to obtain several height intervals;

[0007] Step S2: Obtain the temperature corresponding to each altitude interval;

[0008] Step S3: judging whether there is a height interval with a temperature greater than a preset temperature threshold value one by one in order from low to high, if so, it means that there is a flame on the integrated stove, and counting the number of height intervals with a temperature greater than the preset temperature threshold value, if not, it means that there is no flame on the integrated stove;

[0009] Step S4: estimating the height of the flame on the integrated stove top according to the number of height intervals where the temperature is greater than a preset temperature threshold;

[0010] Step S5: Determine whether the height of the flame on the integrated stove top is greater than or equal to the height between the integrated stove top and the range hood exhaust port. If so, turn off the range hood exhaust switch; if not, the range hood operates normally.

[0011] Preferably, the method further includes the following steps: determining the type of the range hood; if the range hood is a ceiling-type range hood, dividing the surface of the range hood into a plurality of areas, collecting the temperature of each area, and analyzing the temperature of each area; if it is detected that the temperatures of a plurality of areas are significantly increased, it is determined that the area affected by the flame on the range hood is increased.

[0012] Preferably, if the range hood is a side-suction type and is provided with an inclined panel, the temperature characteristics of the inclined panel of the range hood are analyzed, and the flame spread of the range hood is judged based on the temperature characteristics of the inclined panel of the range hood, wherein the temperature characteristics of the inclined panel of the range hood include the characteristic that the temperature from the middle to the highest point of the inclined panel of the range hood first rises sharply, and the characteristic that the temperature in the lowest point area of ​​the inclined panel of the range hood gradually rises.

[0013] Another aspect of the present application provides a range hood automatic exhaust closing system, the system comprising:

[0014] The first acquisition module is used to obtain the height between the integrated stove top and the range hood exhaust port;

[0015] The first division module is used to divide the height between the integrated stove top and the range hood exhaust port into several equal parts to obtain several height intervals;

[0016] The second acquisition module is used to obtain the temperature corresponding to each altitude interval;

[0017] The first judgment module is used to judge whether there is a height interval with a temperature greater than a preset temperature threshold in order from low to high. If so, it means that there is a flame on the integrated stove and execute the statistical module. If not, it means that there is no flame on the integrated stove;

[0018] A statistics module, used to count the number of altitude intervals where the temperature is greater than a preset temperature threshold;

[0019] An estimation module, for estimating the height of the flame on the integrated stove according to the number of height intervals where the temperature is greater than a preset temperature threshold;

[0020] The second judgment module is used to judge whether the height of the flame on the integrated stove is greater than or equal to the height between the integrated stove and the range hood exhaust port. If so, the range hood exhaust switch is turned off; if not, the range hood operates normally.

[0021] Preferably, it also includes: a third judgment module, used to judge the type of the range hood. If the type of the range hood is a ceiling-type range hood, the second division module, the acquisition module and the first analysis module are executed; the second division module is used to divide the surface of the range hood into multiple areas; the acquisition module is used to collect the temperature of each area; the first analysis module is used to analyze the temperature of each area. If it is detected that the temperatures of multiple areas are significantly increased, it is judged that the affected area of ​​the flame on the range hood is increased.

[0022] Preferably, it further comprises a second analysis module and a fourth judgment module, wherein the second analysis module is used to analyze the temperature characteristics of the inclined panel of the range hood, wherein the temperature characteristics of the inclined panel of the range hood include the characteristics that the temperature from the middle to the highest point of the inclined panel of the range hood first rises sharply, and the characteristics that the temperature of the lowest point area of ​​the inclined panel of the range hood rises gradually; the fourth judgment module is used to judge the flame spread of the range hood according to the temperature characteristics of the inclined panel of the range hood;

[0023] In the third judgment module, if the type of the range hood is a side-suction range hood provided with an inclined panel, the second analysis module and the fifth judgment module are executed.

[0024] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0025] In this solution, the height between the integrated stove and the range hood exhaust port is divided into multiple height intervals, and the temperature data of each height interval is obtained. The preset temperature threshold is used as the judgment standard to check whether there is a flame one by one from low to high. Once a height interval whose temperature exceeds the preset temperature threshold is found, it is determined that there is a flame on the integrated stove, and the number of these intervals is counted to estimate the height of the flame, and the estimated flame height is compared with the height between the integrated stove and the range hood exhaust port. If the flame height reaches or exceeds the exhaust port height, the exhaust switch of the range hood is immediately turned off to cut off the path of the flame spreading through the range hood to the flue, thereby effectively preventing the further expansion of the fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The invention discloses a flow chart of steps for automatically shutting off exhaust of a range hood. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] A method for automatically closing exhaust of a range hood, comprising the following steps:

[0029] Step S1: obtaining the height between the integrated stove top and the smoke exhaust port of the range hood, and dividing the height between the integrated stove top and the smoke exhaust port of the range hood into several equal parts to obtain several height intervals;

[0030] Step S2: Obtain the temperature corresponding to each altitude interval;

[0031] Step S3: judging whether there is a height interval with a temperature greater than a preset temperature threshold value one by one in order from low to high, if so, it means that there is a flame on the integrated stove, and counting the number of height intervals with a temperature greater than the preset temperature threshold value, if not, it means that there is no flame on the integrated stove;

[0032] Step S4: estimating the height of the flame on the integrated stove top according to the number of height intervals where the temperature is greater than a preset temperature threshold;

[0033] Step S5: Determine whether the height of the flame on the integrated stove top is greater than or equal to the height between the integrated stove top and the range hood exhaust port. If so, turn off the range hood exhaust switch; if not, the range hood operates normally.

[0034] A range hood automatic exhaust closing method of the present invention, such as Figure 1As shown, the first step is to obtain the height between the integrated stove and the range hood exhaust port, and divide the height between the integrated stove and the range hood exhaust port into several equal parts to obtain several height intervals. In this embodiment, the height between the integrated stove and the range hood exhaust port is 60cm. The height between the integrated stove and the range hood exhaust port is divided into 6 equal parts, and the obtained height intervals are [1, 10], [11, 20], [21, 30], [31, 40], [41, 50] and [51, 60] respectively. By dividing the height interval into several equal parts, it is beneficial to the subsequent temperature detection and flame height judgment. The second step is to obtain the temperature corresponding to each height interval. In this embodiment, by measuring the temperature corresponding to each height interval, it is beneficial to the subsequent judgment whether there is a flame in each height interval. The third step is to determine whether there is a height interval with a temperature greater than the preset temperature threshold in order from low to high. If there is, it means that there is a flame on the integrated stove, and the number of height intervals with a temperature greater than the preset temperature threshold is counted. If not, it means that there is no flame on the integrated stove. In this embodiment, the preset temperature threshold is 70°C. If the corresponding temperature is detected to be greater than 70°C in the height intervals [1, 10], [11, 20], [21, 30], [31, 40], [41, 50] and [51, 60], it is determined that there is a flame on the integrated stove, and the number of height intervals with a temperature greater than the preset temperature threshold is 6. The fourth step is to estimate the height of the flame on the integrated stove according to the number of height intervals with a temperature greater than the preset temperature threshold. In this embodiment, when the number of height intervals with a temperature greater than the preset temperature threshold is 6, it can be estimated that the height of the flame on the integrated stove is 60cm. The fifth step is to determine whether the height of the flame on the integrated stove top is greater than or equal to the height between the integrated stove top and the range hood exhaust port. If so, turn off the range hood exhaust switch. If not, the range hood operates normally. In this embodiment, when the height of the flame on the integrated stove top is 60 cm, the height of the flame on the integrated stove top is equal to the height between the integrated stove top and the range hood exhaust port, indicating that the flame on the integrated stove top affects the range hood and its exhaust port, and the range hood exhaust switch is automatically turned off immediately.

[0035] In this solution, the height between the integrated stove and the range hood exhaust port is divided into multiple height intervals, and the temperature data of each height interval is obtained. The preset temperature threshold is used as the judgment standard to check whether there is a flame one by one from low to high. Once a height interval whose temperature exceeds the preset temperature threshold is found, it is determined that there is a flame on the integrated stove, and the number of these intervals is counted to estimate the height of the flame, and the estimated flame height is compared with the height between the integrated stove and the range hood exhaust port. If the flame height reaches or exceeds the exhaust port height, the exhaust switch of the range hood is immediately turned off to cut off the path of the flame spreading through the range hood to the flue, thereby effectively preventing the further expansion of the fire.

[0036] Preferably, the method further includes the following steps: determining the type of the range hood; if the range hood is a ceiling-type range hood, dividing the surface of the range hood into a plurality of areas, collecting the temperature of each area, and analyzing the temperature of each area; if it is detected that the temperatures of a plurality of areas are significantly increased, it is determined that the area affected by the flame on the range hood is increased.

[0037] In this embodiment, for the ceiling-type range hood, by dividing the surface of the range hood into multiple areas, monitoring the temperature of each area in real time, and judging the flame spread area based on temperature analysis, it is possible to promptly detect abnormal flames or high temperatures on the range hood, and take emergency measures as soon as possible.

[0038] Preferably, if the type of range hood is a side-suction type and is provided with an inclined panel, the temperature characteristics of the inclined panel of the range hood are analyzed, and the flame spread of the range hood is judged based on the temperature characteristics of the inclined panel of the range hood, wherein the temperature characteristics of the inclined panel of the range hood include the characteristics that the temperature from the middle to the highest point of the inclined panel of the range hood first rises sharply, and the characteristics that the temperature in the lowest point area of ​​the inclined panel of the range hood gradually rises.

[0039] In this embodiment, for a side-suction range hood with an inclined panel, the position of the range hood exhaust port corresponding to the integrated stove is generally between the middle and the highest point of the inclined panel, that is, the temperature between the middle and the highest point of the inclined panel rises first, and the temperature rise curve of this area rises steeply because it is likely to face the flame directly. Although the lowest point of the inclined panel does not face the flame directly, when the flame rises, it will continue to spread and transfer heat to the lowest point of the inclined panel. Therefore, the temperature of the area where the lowest point of the range hood inclined panel is located is gradually rising. By judging the flame spread of the range hood based on the temperature characteristics of the range hood inclined panel, the fire risk can be judged more accurately, and a fire warning signal can be issued when it is confirmed that the fire risk has increased.

[0040] Another aspect of the present application provides a range hood automatic exhaust closing system, the system comprising:

[0041] The first acquisition module is used to obtain the height between the integrated stove top and the range hood exhaust port;

[0042] The first division module is used to divide the height between the integrated stove top and the range hood exhaust port into several equal parts to obtain several height intervals;

[0043] The second acquisition module is used to obtain the temperature corresponding to each altitude interval;

[0044] The first judgment module is used to judge whether there is a height interval with a temperature greater than a preset temperature threshold in order from low to high. If so, it means that there is a flame on the integrated stove and execute the statistical module. If not, it means that there is no flame on the integrated stove;

[0045] A statistics module, used to count the number of altitude intervals where the temperature is greater than a preset temperature threshold;

[0046] An estimation module, for estimating the height of the flame on the integrated stove according to the number of height intervals where the temperature is greater than a preset temperature threshold;

[0047] The second judgment module is used to judge whether the height of the flame on the integrated stove is greater than or equal to the height between the integrated stove and the range hood exhaust port. If so, the range hood exhaust switch is turned off; if not, the range hood operates normally.

[0048] An automatic exhaust shut-off system for a range hood of the present invention can detect whether the flame on the integrated stove top has spread to the range hood and its smoke exhaust port through the mutual cooperation of a first acquisition module, a first division module, a second acquisition module, a first judgment module, a statistical module, an estimation module and a second judgment module. If it is detected that the flame on the integrated stove top has spread to the range hood and its smoke exhaust port, the smoke exhaust switch of the range hood is automatically turned off immediately to cut off the path for the flame to spread to the flue through the range hood, thereby effectively preventing the further expansion of the fire.

[0049] Preferably, it also includes: a third judgment module, used to judge the type of the range hood, if the type of the range hood is a ceiling-type range hood, the second division module, the acquisition module and the first analysis module are executed; the second division module is used to divide the surface of the range hood into multiple areas; the acquisition module is used to collect the temperature of each area; the first analysis module is used to analyze the temperature of each area, if it is detected that the temperatures of multiple areas are significantly increased, it is judged that the affected area of ​​the flame on the range hood is increased.

[0050] In this embodiment, for the ceiling-type range hood, by executing the second division module, the acquisition module and the first analysis module, it is possible to promptly discover abnormal flames or high temperatures that may occur on the range hood, and take emergency measures as soon as possible.

[0051] Preferably, it further comprises a second analysis module and a fourth judgment module, wherein the second analysis module is used to analyze the temperature characteristics of the inclined panel of the range hood, wherein the temperature characteristics of the inclined panel of the range hood include the characteristics that the temperature from the middle to the highest point of the inclined panel of the range hood first rises sharply, and the characteristics that the temperature of the lowest point area of ​​the inclined panel of the range hood rises gradually; the fourth judgment module is used to judge the flame spread of the range hood according to the temperature characteristics of the inclined panel of the range hood;

[0052] In the third judgment module, if the type of the range hood is a side-suction range hood provided with an inclined panel, the second analysis module and the fifth judgment module are executed.

[0053] In this embodiment, for a side-suction range hood provided with an inclined panel, the second analysis module and the fifth judgment module can more accurately judge the fire risk, and issue a fire warning signal when it is confirmed that the fire risk is increasing.

[0054] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for automatically shutting off exhaust of a range hood, characterized in that: The following steps are involved: Step S1: obtaining the height between the integrated stove top and the smoke exhaust port of the range hood, and dividing the height between the integrated stove top and the smoke exhaust port of the range hood into several equal parts to obtain several height intervals; Step S2: Obtain the temperature corresponding to each altitude interval; Step S3: judging whether there is a height interval with a temperature greater than a preset temperature threshold value one by one in order from low to high, if so, it means that there is a flame on the integrated stove, and counting the number of height intervals with a temperature greater than the preset temperature threshold value, if not, it means that there is no flame on the integrated stove; Step S4: estimating the height of the flame on the integrated stove top according to the number of height intervals where the temperature is greater than a preset temperature threshold; Step S5: Determine whether the height of the flame on the integrated stove top is greater than or equal to the height between the integrated stove top and the range hood exhaust port. If so, turn off the range hood exhaust switch; if not, the range hood operates normally.

2. A method for automatically shutting off exhaust of a range hood according to claim 1, characterized in that: The following steps are also included: Determine the type of range hood. If the range hood is a ceiling-type range hood, divide the surface of the range hood into multiple areas, collect the temperature of each area, and analyze the temperature of each area. If it is detected that the temperatures of multiple areas are significantly increased, it is determined that the area affected by the flame on the range hood is increased.

3. The method for automatically shutting off exhaust of a range hood according to claim 2, characterized in that: If the range hood is a side-suction type with an inclined panel, the temperature characteristics of the inclined panel of the range hood are analyzed, and the flame spread of the range hood is judged based on the temperature characteristics of the inclined panel of the range hood, wherein the temperature characteristics of the inclined panel of the range hood include the characteristic that the temperature from the middle to the highest point of the inclined panel of the range hood first rises sharply, and the characteristic that the temperature in the lowest point area of ​​the inclined panel of the range hood gradually rises.

4. An automatic exhaust shut-off system for a range hood, using the automatic exhaust shut-off method for a range hood as claimed in any one of claims 1 to 3, characterized in that: The system comprises: The first acquisition module is used to obtain the height between the integrated stove top and the range hood exhaust port; The first division module is used to divide the height between the integrated stove top and the range hood exhaust port into several equal parts to obtain several height intervals; The second acquisition module is used to obtain the temperature corresponding to each altitude interval; The first judgment module is used to judge whether there is a height interval with a temperature greater than a preset temperature threshold in order from low to high. If so, it means that there is a flame on the integrated stove and execute the statistical module. If not, it means that there is no flame on the integrated stove; A statistics module, used to count the number of altitude intervals where the temperature is greater than a preset temperature threshold; An estimation module, for estimating the height of the flame on the integrated stove according to the number of height intervals where the temperature is greater than a preset temperature threshold; The second judgment module is used to judge whether the height of the flame on the integrated stove is greater than or equal to the height between the integrated stove and the range hood exhaust port. If so, the range hood exhaust switch is turned off; if not, the range hood operates normally.

5. The automatic exhaust shut-off system for range hoods according to claim 4, characterized in that: Also includes: A third judgment module is used to judge the type of the range hood. If the type of the range hood is a ceiling-type range hood, the second classification module, the collection module and the first analysis module are executed; The second division module is used to divide the surface of the range hood into multiple areas; A collection module is used to collect the temperature of each area; The first analysis module is used to analyze the temperature of each area. If it is detected that the temperatures of multiple areas are significantly increased, it is determined that the affected area of ​​the flame on the range hood is increased.

6. The automatic exhaust shut-off system for range hoods according to claim 5, characterized in that: The invention also includes a second analysis module and a fourth judgment module, wherein the second analysis module is used to analyze the temperature characteristics of the inclined panel of the range hood, wherein the temperature characteristics of the inclined panel of the range hood include the characteristics that the temperature from the middle to the highest point of the inclined panel of the range hood first rises sharply, and the characteristics that the temperature of the lowest point area of ​​the inclined panel of the range hood rises gradually; the fourth judgment module is used to judge the flame spread of the range hood according to the temperature characteristics of the inclined panel of the range hood; In the third judgment module, if the type of the range hood is a side-suction range hood provided with an inclined panel, the second analysis module and the fifth judgment module are executed.

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