CN110440306B - Control method of gas stove and gas stove - Google Patents
Control method of gas stove and gas stove Download PDFInfo
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- CN110440306B CN110440306B CN201810419936.6A CN201810419936A CN110440306B CN 110440306 B CN110440306 B CN 110440306B CN 201810419936 A CN201810419936 A CN 201810419936A CN 110440306 B CN110440306 B CN 110440306B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
Abstract
The invention discloses a gas stove and a control method thereof, and relates to the technical field of gas stoves. The control method of the gas stove comprises the following steps: after the gas stove is ignited, obtaining the temperature information of a plurality of test points on the pan bottom, analyzing the temperature information of the test points to judge whether the dry burning condition is met, and closing a gas passage of the gas stove when the dry burning condition is met. According to the control method of the gas stove, the plurality of test points are selected on the pot bottom, the temperature information of the plurality of test points is obtained after ignition, whether dry burning phenomenon occurs or not is judged, compared with the situation that only one test point is selected in the prior art, the plurality of test points are selected, the dry burning prevention function failure caused when a single test point fails can be avoided, namely when part of the test points are abnormal, the dry burning prevention function failure of the gas stove cannot be caused, and the reliability is high.
Description
Technical Field
The invention relates to the technical field of gas stoves, in particular to a control method of a gas stove and the gas stove.
Background
The gas stove is an important kitchen ware in daily life, wherein the safety performance is an important index for judging the quality of one gas stove. In order to improve the safety performance of the gas stove, gas stoves with flameout protection and dry burning prevention gas stoves are successively introduced into the market. The principle of the anti-dry-burning gas stove is that the temperature of the pot bottom is sensed through the temperature sensing probe, a temperature signal is transmitted to the control system, and when the temperature of the pot bottom is higher than a set maximum temperature, the control system sends an instruction to close a gas passage to achieve the anti-dry-burning function.
The anti-dry-burning gas stove realizes the anti-dry-burning function by sensing the temperature of the pot bottom through the temperature sensing probe, brings convenience to users and simultaneously exposes a defect.
Disclosure of Invention
The invention aims to provide a control method of a gas stove, which ensures that an anti-dry heating function is not easy to lose effectiveness and has high reliability.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of a gas stove comprises the following steps:
after the gas stove is ignited, obtaining the temperature information of a plurality of test points on the pan bottom, analyzing the temperature information of the test points to judge whether the dry burning condition is met, and closing a gas passage of the gas stove when the dry burning condition is met.
Wherein the temperature information comprises a temperature value and/or a temperature rise rate of the test point.
When the temperature information comprises the temperature value of the test point, the dry-burning condition comprises:
the average value of the temperature values of the plurality of test points is larger than the preset dry burning prevention highest temperature.
And when the average value of the temperature values of the plurality of test points is calculated, the maximum value and the minimum value in the temperature values of the plurality of test points are eliminated.
Wherein, when the temperature information includes a temperature rise rate of the test point, the dry-fire condition includes:
the average value of the temperature rise rates of the plurality of test points is larger than the preset dry-burning-prevention maximum temperature rise rate.
And when the average value of the temperature rise rates of the plurality of test points is calculated, the maximum value and the minimum value in the temperature rise rates of the plurality of test points are eliminated.
And after the gas passage of the gas stove is closed, the gas stove gives an alarm.
The invention further aims to provide the gas stove, the dry burning prevention function of the gas stove is not easy to lose effectiveness, the reliability is high, and the use experience of a user is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gas stove comprises a control system and a temperature measuring sensor, wherein the temperature measuring sensor comprises a plurality of temperature sensing probes, and the gas stove adopts the control method of the gas stove.
Has the advantages that: the invention provides a gas stove and a control method thereof. According to the control method of the gas stove, the plurality of test points are selected from the pot bottom, the temperature information of the plurality of test points is obtained after ignition, whether dry burning phenomenon occurs or not is judged, compared with the situation that only one test point is selected in the prior art, the plurality of test points are selected, the dry burning prevention function failure caused when a single test point fails can be avoided, namely when part of the test points are abnormal, the dry burning prevention function failure of the gas stove cannot be caused, and the reliability is high.
Drawings
Fig. 1 is a flowchart of a control method of a gas range provided in embodiment 1 of the present invention;
FIG. 2 is a flowchart of determining whether the appliance is dry-burned according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of a temperature sensor provided in embodiment 1 of the present invention;
FIG. 4 is a sectional view of a temperature sensor provided in embodiment 1 of the present invention;
FIG. 5 is a cross-sectional view of a body provided in example 1 of the present invention;
fig. 6 is a schematic structural view of a temperature sensing probe and a lead wire according to embodiment 1 of the present invention;
FIG. 7 is a sectional view of a temperature sensitive probe according to embodiment 1 of the present invention;
fig. 8 is a flowchart of a control method of a gas range according to embodiment 2 of the present invention.
Wherein:
1. a body; 11. a first cylinder; 111. a telescoping chamber; 112. a limiting plate; 12. a second cylinder; 121. an annular flange; 122. a wire lumen; 13. an end cap; 131. a first through hole; 2. a temperature sensing probe; 21. a limiting part; 211. a card slot; 3. a wire assembly; 31. a wire; 4. a spring; 5. and (4) screws.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the embodiment provides a control method of a gas stove, which can realize an anti-dry heating function of the gas stove. Specifically, after the gas stove is ignited, a plurality of test points are selected from the pot bottom, temperature information of the test points is obtained, whether dry burning conditions are met or not is judged through comprehensively analyzing the temperature information of the test points, when the dry burning conditions are met, a gas passage of the gas stove is closed, gas supply is stopped, and therefore the dry burning prevention function is achieved, the safety performance of the gas stove is improved, and personal safety of a user is guaranteed. And when the gas stove does not meet the dry burning condition, the gas stove is in a normal working state, the gas passage of the gas stove is kept in an open state, and the temperature information of the test point is continuously acquired so as to be judged again. The control method of the gas stove provided by the embodiment selects the plurality of test points on the pot bottom, acquires the temperature information of the plurality of test points after ignition, and judges whether the dry burning phenomenon occurs, compared with the prior art that only one test point is selected, the plurality of test points are selected, so that the dry burning prevention function failure caused by the failure of a single test point can be avoided, namely when part of the test points are abnormal, the rest test points can still continue to perform dry burning judgment, the dry burning prevention function failure of the gas stove cannot be caused, and the reliability is high.
In this embodiment, the temperature information of the test point may include a temperature value of the test point. When the dry-burning condition is judged to be met, as shown in fig. 2, the average value of the temperature values of the plurality of test points is calculated, when the average value of the temperature values of the plurality of test points is larger than the preset dry-burning prevention highest temperature, the dry-burning condition is met, at the moment, the cooking appliance used on the gas stove is in a dry-burning state, and the gas stove avoids the appliance from being continuously used in the dry-burning state by closing a gas passage so as to avoid potential safety hazards. If the average value of the temperature values of the plurality of test points is smaller than the preset dry burning prevention maximum temperature, the fact that the dry burning phenomenon does not occur in the cooking utensil is indicated, and the gas stove works normally.
In order to avoid abnormal data in the temperature information of the test points, the highest temperature value and the lowest temperature value in the temperature values are removed before the average value of the temperature values of the test points is calculated, and the average value of the rest temperature values is calculated, so that the accuracy of dry burning judgment is ensured.
After the condition of dry burning is satisfied in the judgement, the gas-cooker sends alarm information when closing the gas access, reminds the user in time to handle through alarm information to improve user's use and experience.
The embodiment also provides a gas stove which adopts the control method to realize the dry burning prevention function. The gas stove comprises a burner, a valve body, a shell, a stove frame, a knob, an air inlet pipe and an igniter. The combustor is the important component of gas-cooker, and the combustor generally includes fire lid seat, gas shunt and fire lid, is provided with the ring channel on the fire lid seat, and the fire lid is detained and is established on the fire lid seat and form the gas tank, and the fire lid is provided with out the fire hole on the surface to form the fire circle.
For improving the security performance of gas-cooker, the gas-cooker still includes temperature sensor in this embodiment, can be provided with the mounting hole on the fire lid seat, and temperature sensor and mounting hole cooperation for temperature sensor is located the below of pot, and the control system in temperature sensor and the gas-cooker is connected. When a user uses the gas stove, the bottom of the pot is in contact with the temperature measuring sensor, and the temperature of the bottom of the pot is detected through the temperature measuring sensor, so that the temperature information of the test point is obtained.
In order to enable the temperature sensor to sense the temperature information of a plurality of points at the bottom of a cooking utensil such as a pot, as shown in fig. 3, the temperature sensor in the embodiment includes a temperature sensing probe, the temperature sensing probe includes a plurality of temperature sensing probes 2, and a contact point between each temperature sensing probe 2 and the bottom of the utensil is a test point. By collecting the temperature information of the plurality of test points, the failure of the dry burning prevention function caused by the failure of a single test point can be avoided, namely when part of the test points are abnormal, the rest test points can still continue to perform dry burning judgment, the failure of the dry burning prevention function of the gas stove cannot be caused, and the reliability is high.
Because the user uses the pot of different grade type when culinary art different dishes, the pot bottom has different grade type such as flat, round bottom, sharp bottom, for guaranteeing that every temperature-sensing probe 2 in the temperature sensor all can keep effective contact with the pot bottom to guarantee the accuracy of temperature-sensing, improved the structure of temperature sensor in this embodiment, made its response end can adapt to the pot bottom of different grade type.
Specifically, as shown in fig. 3 and 4, the temperature measuring sensor includes a body 1, a temperature sensing probe, and a lead assembly 3. The temperature sensing probe comprises a plurality of temperature sensing probes 2, the temperature sensing probes 2 can be arranged in parallel, and each temperature sensing probe 2 is arranged on the body 1 in a telescopic mode. Each temperature sensing probe 2 is connected with one lead 31, a plurality of leads 31 form a lead assembly 3, and the lead assembly 3 is connected with a control system of the gas stove.
When a user uses the gas stove, the pot is placed on the gas stove, and the pot bottom is abutted against the end part of the temperature sensing probe, so that the temperature sensing probe 2 generates telescopic displacement relative to the body 1. According to different shapes of the pot bottom and the depth of the pot bottom at the position of each temperature sensing probe 2, each temperature sensing probe 2 stretches and retracts adaptively, so that each temperature sensing probe 2 can be kept in good contact with the pot bottom, the effective contact area of the temperature sensing probe and the pot bottom is ensured, the temperature sensing effect is improved, and the dry burning prevention function is realized. For example, when the pan is a pan, the end parts of the temperature sensing probes 2 are flush with the bottom of the pan by being compressed; when the round-bottom pot is used, the heights of the end parts of the temperature sensing probes 2 are different, and the end parts of the temperature sensing probes 2 are arranged in an arc shape and matched with the shape of the pot bottom. The temperature sensing probe 2 is adaptively extended and contracted according to the shape of the bottom of the pan so as to be adapted to different types of pans.
The temperature value detected by each temperature sensing probe 2 is transmitted into the control system through the connected lead 31, and the control system comprehensively considers the temperature detected by the plurality of temperature sensing probes 2 and judges whether the dry burning phenomenon occurs, so that the on-off of the gas passage of the gas stove is controlled.
As shown in fig. 4, in order to realize the extension and contraction of the temperature sensing probe 2 relative to the body 1, the temperature sensor further includes a plurality of springs 4, and each temperature sensing probe is correspondingly connected with one spring 4. The bottom end of the spring 4 is connected with the body 1, the top end is connected with the temperature sensing probe, and the spring 4 pushes the temperature sensing probe 2 to move towards the direction far away from the body 1, namely the spring 4 pushes the temperature sensing probe 2 to move upwards. When the pan bottom is contacted with the end of the temperature sensing probe 2, the pressure of the pan bottom on the temperature sensing probe 2 compresses the spring 4, thereby changing the position of the end of the temperature sensing probe 2 so as to be matched with the pan bottom. Meanwhile, the elastic force of the spring 4 ensures that the temperature sensing probe 2 is always abutted against the pan bottom, thereby ensuring that the temperature sensing probe 2 is in pressing contact with the pan bottom.
For avoiding the spring 4 to appear crooked, skew at the in-process of compression to influence the contact effect of temperature sensing probe 2 and bottom of a boiler, as shown in fig. 4 and 5, can be provided with flexible chamber 111 in the body 1, spring 4 sets up in flexible chamber 111, and the bottom of spring 4 is connected with the bottom surface in flexible chamber 111, and the top of spring 4 is connected with the bottom of temperature sensing probe 2, and the lateral wall in flexible chamber 111 plays the guide effect to spring 4, thereby avoids spring 4 to take place skew or crooked. In order to limit the extension and retraction direction of the temperature sensing probe 2, the bottom end of the temperature sensing probe 2 can be located in the extension and retraction cavity 111, so that the extension and retraction cavity 111 provides a guiding function for the temperature sensing probe 2.
Specifically, in this embodiment, the body 1 includes a cylinder and end covers 13, the upper and lower ends of the cylinder are open, and the end covers 13 may be connected with the cylinder by screws 5 and fixed thereto. The limiting plate 112 is arranged in the cylinder, the limiting plate 112 divides the cavity in the cylinder into two parts, namely a telescopic cavity 111 located above and a wire cavity 122 located below, the spring 4 and part of the temperature sensing probe 2 are located in the telescopic cavity 111, the top end of the temperature sensing probe 2 extends out of the body 1 through a first through hole 131 formed in the end cover 13, and the bottom end of the temperature sensing probe 2 is connected with the spring 4. The limiting plate 112 is provided with a second through hole, so that the wire cavity 122 is communicated with the telescopic cavity 111, after the wire 31 is connected with the bottom end of the temperature sensing probe 2, the wire enters the wire cavity 122 through the second through hole and extends out of the opening at the bottom end of the cylinder body, and the cylinder body can play a role in protecting the wire 31 and avoid abrasion of the wire 31. In order to facilitate the connection of the leads 31 of the plurality of temperature sensing probes 2 with the control system, in this embodiment, the plurality of leads 31 form a lead assembly 3, and the lead assembly 3 is electrically connected with the control system after extending out of the cylinder. Because the temperature sensing probe 2 sets up to a plurality of and the volume is great, the barrel is stair structure in this embodiment, and the barrel includes first barrel 11 and second barrel 12, and flexible chamber 111 is located first barrel 11, and wire chamber 122 is located second barrel 12, and the cross sectional area of first barrel 11 is greater than the cross sectional area of second barrel 12.
An annular flange 121 is arranged on the outer side surface of the second cylinder 12, and the annular flange 121 can be matched with a burner to fix the temperature measuring sensor.
In order to improve the guiding effect of the telescopic cavity 111 on the spring 4 and the temperature sensing probe 2, as shown in fig. 5, a plurality of telescopic cavities 111 are formed in the first cylinder 11 by arranging a blocking part, one spring 4 and one temperature sensing probe 2 are correspondingly arranged in each telescopic cavity 111, and the cross-sectional area and the shape of each telescopic cavity 111 are matched with the spring 4 and the temperature sensing probe 2, so that the spring 4 is prevented from being bent.
In order to prevent the spring 4 from being separated from the telescopic cavity 111 through the first through hole 131 or the second through hole, the maximum width of the cross section of the first through hole 131 and the second through hole is smaller than the maximum width of the cross section of the telescopic cavity 111. After the spring 4 is installed in the telescopic cavity 111, the bottom end of the spring 4 can abut against the limiting plate 112, and the sectional area and the shape of the spring 4 are the same as those of the telescopic cavity 111, so that the spring 4 cannot pass through the first through hole 131 or the second through hole, and the spring 4 is guaranteed to be located in the telescopic cavity 111 all the time.
In order to prevent the bottom end of the temperature sensing probe 2 from being separated from the telescopic cavity 111, as shown in fig. 6, a limiting portion 21 is disposed at one end of the temperature sensing probe 2 connected to the spring 4, that is, the bottom end of the temperature sensing probe 2, and a maximum width of a cross section of the limiting portion 21 is greater than a maximum width of a cross section of the first through hole 131 and smaller than a maximum width of a cross section of the telescopic cavity 111, so that the limiting portion 21 is always located in the telescopic cavity 111.
As shown in fig. 7, the bottom end face of the limiting portion 21 is further provided with a clamping groove 211, the upper end of the spring 4 is in matched clamping connection with the clamping groove 211, the spring 4 can be connected with the limiting portion 21, and the clamping groove 211 can improve the firmness of connection between the spring 4 and the limiting portion 21.
Example 2
The present embodiment provides a control method of a gas range and a gas range, the structure of the gas range is the same as that in embodiment 1, the control method of the gas range is substantially the same as that in embodiment 1, and the difference from embodiment 1 is the acquired temperature information and the dry-burning condition.
Specifically, as shown in fig. 8, the temperature information of the plurality of test points in the present embodiment includes the temperature rise rate of the test point. When whether the appliance on the gas stove is dry-burning-resistant is judged, whether the average value of the temperature rise rates of the plurality of test points is larger than the preset dry-burning-resistant maximum temperature rise rate or not is judged by calculating the average value of the temperature rise rates of the plurality of test points. If the average value is larger than the maximum dry-burning-prevention temperature rise rate, the device is in a dry-burning state, and the control system of the gas stove controls the gas passage to be closed, so that the purpose of preventing dry burning is achieved.
In order to avoid abnormal data in the temperature information of the test point, the highest temperature rise rate and the lowest temperature rise rate in the temperature rise rates are eliminated before the average value of the temperature rise rates of the test point is calculated, and the average value of the rest temperature rise rates is calculated, so that the accuracy of dry burning judgment is guaranteed.
In other embodiments, the temperature information of the test point may include a temperature value of the test point and a temperature rise rate. Specifically, when different cooking methods are adopted, the maximum temperature reached by the bottom of the pot in the whole cooking process is different, for example, when cooking and frying food, the instantaneous temperature of the bottom of the pot is higher, and in the cooking process of stewing and the like with more water, the smooth temperature of the bottom of the pot is lower, and the misjudgment process that the fried food is not cooked and flameout easily occurs only by taking the temperature as the judgment standard of dry cooking. The change condition of the temperature of the bottom of the pot in the whole cooking process is divided into three stages: in the first stage, the temperature of the bottom of the pan and the food in the pan begins to gradually rise, and the temperature rise rate is smaller and gradually reduced; in the second stage, the bottom and the food in the pan are heated, the heat absorption body is changed into water in the pan, the temperature is continuously and slowly increased, and the temperature rising rate is basically kept unchanged; in the third stage, the temperature of the bottom of the pan and the food in the pan is higher, the water in the pan is continuously heated to boil and evaporate, the pan and the food in the pan become heat absorption bodies, the temperature rise rate of the bottom of the pan is higher, and the dry burning phenomenon mostly occurs in the third stage. In order to avoid the misjudgment condition that the gas channel is closed due to the fact that food is not cooked when the temperature of the pot bottom is only considered, namely cooking is in the second stage, when the food is not cooked and the temperature of the pot bottom is high, the preset dry burning prevention highest temperature can be set in the second stage, on the basis that the average value of the temperature values of the plurality of test points is judged to be larger than the preset dry burning prevention highest temperature value, whether the average value of the temperature rise rates of the plurality of test points is larger than the preset dry burning prevention highest temperature rise rate or not is continuously judged, the dry burning prevention highest temperature rise rate is in the third stage, and the appliance is judged to be in the dry burning stage only under the condition that the average value of the temperature values of the plurality of test points is larger than the preset dry burning prevention highest temperature rise rate, so that the accuracy of dry burning judgment is improved.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (7)
1. A control method of a gas stove is characterized by comprising the following steps:
after the gas stove is ignited, acquiring temperature information of a plurality of test points on the bottom of the pot through a temperature measuring sensor, analyzing the temperature information of the test points and judging whether a dry burning condition is met, wherein when the dry burning condition is met, a gas passage of the gas stove is closed, and after the gas passage of the gas stove is closed, the gas stove gives an alarm;
the temperature sensor comprises a body, a temperature sensing probe and a lead assembly;
the body comprises a cylinder body and end covers, the upper end and the lower end of the cylinder body are opened, the end covers are fixed with the cylinder body, first through holes are formed in the end covers, and the interior of the cylinder body is divided into an upper telescopic cavity and a lower wire cavity;
the temperature sensing probe comprises a plurality of temperature sensing probes and a plurality of springs, each temperature sensing probe is correspondingly connected with one spring, the top end of each temperature sensing probe extends out of the body through the first through hole, the bottom end of each temperature sensing probe is provided with a limiting part, the maximum width of the cross section of the limiting part is larger than that of the first through hole, the bottom end face of the limiting part is provided with a clamping groove, the springs are arranged in the telescopic cavities, one end of each spring is connected with the bottom face of each telescopic cavity, and the other end of each spring is matched and clamped with the clamping groove; each temperature sensing probe is connected with a lead, the lead is positioned in the lead cavity, and a plurality of leads form a lead assembly.
2. The control method of a gas range as set forth in claim 1, wherein the temperature information includes a temperature value and/or a temperature rise rate of the test point.
3. The control method of a gas range as set forth in claim 2, wherein when the temperature information includes the temperature value of the test point, the dry-fire condition includes:
the average value of the temperature values of the plurality of test points is larger than the preset dry burning prevention highest temperature.
4. The control method of the gas range as set forth in claim 3, wherein the maximum value and the minimum value among the temperature values of the plurality of test points are rejected when the average value of the temperature values of the plurality of test points is calculated.
5. The control method of a gas range as set forth in claim 2, wherein when the temperature information includes a temperature rise rate of the test point, the dry-fire condition includes:
the average value of the temperature rise rates of the plurality of test points is larger than the preset dry-burning-prevention maximum temperature rise rate.
6. The control method of the gas range as set forth in claim 5, wherein when the average value of the temperature rise rates of the plurality of test points is calculated, the maximum value and the minimum value among the temperature rise rates of the plurality of test points are rejected.
7. A gas stove is characterized by comprising a control system and a temperature measuring sensor, wherein the temperature measuring sensor comprises a plurality of temperature sensing probes, and the gas stove adopts the control method of the gas stove as claimed in any one of claims 1 to 6.
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