CN113589865A - Tobacco charging barrel temperature control method based on pulse width modulation - Google Patents
Tobacco charging barrel temperature control method based on pulse width modulation Download PDFInfo
- Publication number
- CN113589865A CN113589865A CN202110785958.6A CN202110785958A CN113589865A CN 113589865 A CN113589865 A CN 113589865A CN 202110785958 A CN202110785958 A CN 202110785958A CN 113589865 A CN113589865 A CN 113589865A
- Authority
- CN
- China
- Prior art keywords
- value
- pulse width
- temperature
- time
- feed liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Feedback Control In General (AREA)
- Control Of Temperature (AREA)
Abstract
The invention relates to a temperature control method for a tobacco charging barrel by pulse width modulation, which comprises the following steps: step one, after a feeder is prepared for production and a feed liquid is poured into a feeding tank, judging according to an upper limit and lower limit switching rule based on an empirical critical value, and closing a valve if the temperature of the feed liquid is greater than or equal to (55-X) DEG C; if the temperature of the feed liquid is lower than (55-X) DEG C, controlling a steam on-off valve by adopting a pulse width modulation signal; step two, when the steam on-off valve is controlled by adopting the pulse width modulation signal, the following three rules are followed: a. selecting a pulse width rule according to conditions; b. high level pulse width calculation rules; c. and (4) a low-level pulse width calculation rule. The invention innovatively solves the problems of the prior art that the temperature control is unstable and the requirement of accurate temperature control is well met.
Description
Technical Field
The invention relates to a temperature control technology of feed liquid in a charging barrel of a tobacco charging machine, in particular to a temperature control method of a tobacco charging barrel modulated by pulse width.
Background
The tobacco shred making feeder is equipment for atomizing tobacco flakes and adding feed liquid in a tobacco shred making process, and the feeding cylinder is used for storing the feed liquid and maintaining the temperature of the feed liquid to be constant. The temperature control effect of the HAUNI type feeder and the feeding cylinder made by national Qinhuang island which are common in the industry are not the most beautiful. The temperature acquisition source of the charging machine tank body is a temperature measuring sensor, and the temperature of the tank body is controlled by two execution actions of opening and closing a steam on-off valve. Steam is sprayed into the sealed interlayer at the periphery of the tank body, and the feed liquid is indirectly heated by the heat of the tank wall. When the feed liquid in the tank is more, the heating process is slower. When the feed liquid in the tank is less, the heating is rapid and the overtemperature is easy to occur. From the perspective of tank body design, the heat preservation effect is better, can keep the feed liquid temperature of the tank body for a long time, and the heat dissipation is very slow.
Generally, the temperature control of a charging barrel in the prior art is controlled by adopting a single steam on-off valve, the temperature of a tank is higher than 55 ℃ (the temperature control index value of a charging machine feed liquid), and the steam on-off valve is closed; the temperature of the tank is lower than 54 ℃ (the temperature is usually 1 ℃ lower than 55 ℃ depending on the debugging condition of the equipment), and the steam on-off valve is opened. The temperature control model has the defect that when the residual amount of feed liquid at the end of production is less, a large amount of steam entering after the steam on-off valve is opened can keep the effect of continuously heating a small amount of feed liquid, so that the tail of a batch has the fluctuation of temperature rise and climbing of a tank body, the feed liquid is over-heated, and the product quality is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for controlling the temperature of a tobacco charging barrel by pulse width modulation, which enables the opening and closing of a steam on-off valve in the temperature control of the tobacco charging barrel to be controlled by a high-low level type signal with adjustable pulse width, and the pulse width (the period length of the high-low level) is directly related to the amount of residual material liquid in the tank, thereby achieving the purpose of stably controlling the temperature of the material.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a temperature control method for a tobacco charging cylinder by pulse width modulation comprises the following steps:
judging whether a feeder is ready for production, judging according to an upper and lower limit switch rule based on an experience critical value after the feeder is ready for production and a feed liquid is poured into a feed tank, and closing a valve if the temperature of the feed liquid is greater than or equal to (55-X) DEG C; if the temperature of the feed liquid is lower than (55-X) DEG C, controlling a steam on-off valve by adopting a pulse width modulation signal;
step two, when the steam on-off valve is controlled by adopting the pulse width modulation signal, the following three rules are followed:
a. selecting a pulse width rule according to conditions: dividing the material liquid weight value of the current feeding tank and the material liquid temperature value of the feeding tank according to the value areas, so that different value combinations respectively use different modulation modes to generate high and low levels;
b. high level pulse width calculation rule: mainly correlating the high-level conduction time with the weight value of the feed liquid in the feeding tank body, and selecting a fixed value or a calculation formula according to a pulse width rule selected according to conditions to obtain the high-level pulse conduction time; namely the time region in which the high-level pulse width enables the steam on-off valve to be opened;
c. low level pulse width calculation rule: mainly correlating the low-level conduction time with the temperature value of the feed liquid in the feeding tank body, and selecting a fixed value or a calculation formula according to a pulse width rule selected by conditions to obtain the low-level pulse conduction time; i.e., the time region in which the low-level pulse width causes the steam cutoff valve to close.
As a preferred scheme, in the first step, the value of X is set according to the temperature characteristic when the equipment is debugged, and the value range of X is 0.1-1 ℃.
Preferably, the calculation rule of the high and low level pulse width of the pulse width modulation signal is as follows:
when the weight of the feed liquid in the tank body is larger than W1, the set value of the pulse on-time is T1, and the set value of the pulse off-time is T2;
when the weight of the feed liquid in the tank body is smaller than W1 and larger than W2, the set value of the pulse conduction time is equal to the weight value/W1T 1 of the feed liquid in the current tank; the pulse off time set point is selected to be T3 or T4 according to the current tank temperature;
when the weight of the feed liquid in the tank body is less than W2, the pulse on-time set value is 0, and the pulse off-time set value is T2.
Preferably, when the weight of the feed liquid in the tank body is less than W1 and greater than W2, the pulse on-time set value is the current weight value of the feed liquid in the tank body/W1 × T1; the conditions for determining the pulse off time set value are as follows: when the temperature of the tank is lower than 53 ℃, the set value of the pulse turn-off time is T3; when the tank temperature is higher than 53 ℃ and lower than (55-X) DEG C, the pulse-off time set value is T4.
According to a preferable scheme, W1 is an empirical value of the weight of feed liquid in a feeding tank in actual production, the value is an average value of the total weight of a plurality of batches of feed liquid, the value range is 130-150 kg, W2 is the weight value of the feed liquid when the temperature of the feed liquid begins to decrease after the heat preservation effect of the tank body fails in the production process of a feeder, the value range is 2-10 kg, T1 is a short-time fixed value of 1, and the value range is 10-30S; t2 is a long-time fixed value of 2, and the value range is 200-400S; t3 is a short-time fixed value of 3, and the value range is 40-60S; t4 is a long-time constant value of 4, and the value range is 400-600S.
Compared with the prior art, the invention has the beneficial effects that at least:
the temperature region setting number and the temperature region setting value of the upper and lower limit switch rule based on the empirical critical value provided by the embodiment of the invention better mark out the temperature region suitable for the pulse width modulation signal generator so as to better control the temperature stability; the method for calculating the pulse width of the high and low levels based on the fixed value or the formula and the pulse width rule selected according to conditions solves the problems of the prior art that the temperature control is unstable and the pulse on-time set value is related to the amount of the material liquid in the tank body, and the pulse off-time set value is related to the current tank temperature, so that the requirement of accurate temperature control is well met.
The invention designs a control method which can still stably control the temperature of the material along with the process of reducing the material liquid. In the method, the opening and closing of the steam on-off valve are controlled by high and low level type signals with adjustable pulse width, and the pulse width (high and low level period length) is directly related to the residual material liquid amount in the tank, so that the aim of stably controlling the material temperature is fulfilled.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic overall flow diagram of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of the present invention using PWM signals for temperature control;
FIG. 3 is a diagram illustrating a second case of temperature control using PWM signals according to the present invention;
FIG. 4 is a schematic diagram of a third embodiment of the present invention using PWM signals for temperature control;
FIG. 5 is a diagram illustrating a fourth case of temperature control using PWM signals according to the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.
Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The invention will be further illustrated with reference to the following examples and drawings:
as shown in FIG. 1, a pulse width modulated tobacco charging canister temperature control method is constructed by a pulse width modulated signal generator and an upper and lower limit switching rule based on empirical critical values. The PWM signal generator includes a conditionally selectable PWM rule, a high level PWM calculation rule, and a low level PWM calculation rule.
The rule of upper and lower limit switches based on empirical critical values is similar to the original equipment control method, namely, the steam on-off valve is opened or closed according to temperature areas. In the original equipment control method, the tank temperature is higher than 55 ℃ (the temperature control index value of the material liquid of the charging machine), and the steam on-off valve is closed; the temperature of the tank is lower than 54 ℃, and the steam on-off valve is opened.
In this embodiment, the different contents of the upper and lower limit switching rules based on the empirical critical value are mainly:
first, the temperature zones are set in different numbers. The original equipment control method is divided into three temperature areas: greater than 55 deg.C (temperature zone 1), greater than 54 deg.C and less than 55 deg.C (temperature zone 2), and less than 54 deg.C (temperature zone 3). The upper and lower limit switching rules based on empirical thresholds are divided into two temperature regions: greater than or equal to (55-X) DEG C (temperature region 1), less than (55-X) DEG C (temperature region 2). Wherein the value of X is reasonably set according to the temperature characteristic when the equipment is debugged, and the value range of X is 0.1-1 ℃. When the Hangzhou cigarette factory is debugged, the value of X is 0.25.
Secondly, the temperature zone setting values are different. The original equipment control method is divided into three temperature areas: greater than 55 deg.C, greater than 54 deg.C, less than 55 deg.C, and less than 54 deg.C (with numerals 54 and 55 as zone boundaries). The upper and lower limit switching rules based on empirical thresholds are divided into two temperature regions: greater than or equal to (55-X) DEG C, less than (55-X) DEG C (with the number 55-X as a zone boundary). Wherein the X value setting rule is as above.
Thirdly, the temperature zone setting function is different. The original equipment control method is divided into three temperature areas: greater than 55 deg.C (open valve), greater than 54 deg.C and less than 55 deg.C (unchanged valve state), and less than 54 deg.C (close valve). The upper and lower limit switching rules based on empirical thresholds are divided into two temperature regions: and when the temperature is higher than or equal to (55-X) DEG C, closing the valve, and when the temperature is lower than (55-X) DEG C, controlling the steam on-off valve by adopting a pulse width modulation signal. Wherein the X value setting rule is as above.
The specific embodiment of the invention is as follows:
after the feeder is ready for production and the feed liquid is poured into the feeding tank, judging according to an upper and lower limit switch rule based on an empirical critical value, and closing a valve if the temperature of the feed liquid is greater than or equal to (55-X) DEG C; if the temperature of the feed liquid is less than 54 ℃, a pulse width modulation signal is adopted to control the steam on-off valve.
The pulse width modulation signal generator is used for generating high and low levels with different periods. According to the construction of the pulse width rule selected according to different conditions, firstly, a pulse on-time set value (namely, a high-level pulse width calculation rule) is determined according to a tank body material liquid weight value, and then, a pulse off-time set value (namely, a low-level pulse width calculation rule) is determined according to a current tank temperature value. Correlating the pulse conduction time set value with the amount of the feed liquid in the tank body; the pulse off time set point is correlated with the current tank temperature.
When the weight of the feed liquid in the tank body is larger than W1, the set value of the pulse on-time is T1, and the set value of the pulse off-time is T2; (i.e., case 1, as shown in FIG. 2); when the weight of the feed liquid in the tank body is smaller than W1 and larger than W2, the set value of the pulse conduction time is equal to the weight value/W1T 1 of the feed liquid in the current tank; when the temperature of the tank is lower than 53 ℃, the pulse turn-off time set value is T3, so that the aim of rapid temperature rise is fulfilled; (i.e., case 2, as shown in FIG. 3); when the temperature of the tank is higher than 53 ℃ and lower than (55-X) DEG C, the set value of the pulse turn-off time is T4, so that the aim of slowly raising the temperature is fulfilled; (i.e., case 3, as shown in FIG. 4); when the weight of the feed liquid in the tank body is less than W2, the pulse on-time set value is 0, and the pulse off-time set value is T2. (i.e., case 4, as shown in FIG. 5).
Taking the actual value of the hangzhou cigarette factory after debugging as an example, if W1 is 140kg, W2 is 5kg, T1 is 20S, T2 is 300S, T3 is 50S, and T4 is 500S. The method for constructing the tobacco charging cylinder temperature control model modulated by the pulse width is as follows:
when the weight of the feed liquid in the tank body is just poured and the total weight of the feed liquid is larger than the average value of other batches, the temperature needs to be quickly raised, and the overtemperature cannot be too high when the temperature is close to 55 ℃, so that the steam on-off valve is switched on in a relatively quick temperature raising pulse mode, the time for switching on the steam on-off valve is 20 seconds, and the time for switching off the steam on-off valve is 300 seconds. In case 1, when the weight of the feed liquid in the tank body is greater than 140kg, the set value of the pulse on time is 20S, and the set value of the pulse off time is 300S; as shown in fig. 2.
When the weight of the feed liquid in the tank body is just poured and the total weight of the feed liquid is smaller than the average value of other batches, or after production is started, the feed liquid just begins to reduce, and the actual temperature of the feed liquid is 55 ℃ lower than the standard temperature and is more than 2 ℃ (lower than 53 ℃), the temperature needs to be quickly raised, and the temperature cannot be too high when the temperature is close to 55 ℃, so that a steam on-off valve is quickly raised, the time for connecting the steam on-off valve is longer, but the time is smaller than the value of (case 1), and reasonable distribution is carried out according to the weight of the feed liquid in the actual tank. Therefore, the set value of the pulse off time is equal to the weight value of the feed liquid in the current tank/140 kg by 20S, and the set value of the pulse off time is equal to 50S, so that the aim of quickly raising the temperature is fulfilled. In case 2, when the weight of the feed liquid in the tank body is less than 140kg and greater than 5kg, the set value of the pulse on time is 20S per 140kg of the feed liquid in the tank body and 50S per 50S, respectively, when the tank temperature is less than 53 ℃, so as to achieve the purpose of rapid temperature rise, as shown in fig. 3.
When the weight of the feed liquid in the tank body is just poured and the total weight of the feed liquid is smaller than the average value of other batches, or after production is started, the feed liquid just begins to reduce, and when the actual temperature of the feed liquid is lower than the standard temperature by 55 ℃ and less than 2 ℃ (the temperature of the tank is higher than 53 ℃ and lower than (55-X) DEG C), the temperature needs to be slowly increased and cannot be excessively increased when the temperature is close to 55 ℃, so that the steam on-off valve is switched on by adopting a relatively slow temperature increase pulse type, and the time for switching on the steam on-off valve is shorter. Therefore, the set value of the pulse off time is equal to the weight value of the feed liquid in the current tank/140 kg by 20S, and the set value of the pulse off time is equal to 500S, so that the aim of slowly raising the temperature is fulfilled. In case 3, when the weight of the feed liquid in the tank is less than 140kg and greater than 5kg, and the tank temperature is greater than 53 ℃ and less than (55-X), the pulse on time is set to the current weight of the feed liquid in the tank/140 kg by 20S, and the pulse off time is set to 500S (for slow temperature rise). As shown in fig. 4.
When the weight of the feed liquid in the tank body is very small, the residual heat of the steam added in the last stage can be utilized for heat preservation, and the production can be finished without opening a steam on-off valve in principle. In case 4, when the weight of the pot material liquid is less than 5kg, the set value of the pulse-on time is 0 and the set value of the pulse-off time is 300S. As shown in fig. 5.
And if the production is finished, closing the steam on-off valve.
The whole model control flow is shown in fig. 1.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (5)
1. A temperature control method for a tobacco charging cylinder modulated by pulse width is characterized by comprising the following steps:
judging whether a feeder is ready for production, judging according to an upper and lower limit switch rule based on an experience critical value after the feeder is ready for production and a feed liquid is poured into a feed tank, and closing a valve if the temperature of the feed liquid is greater than or equal to (55-X) DEG C; if the temperature of the feed liquid is lower than (55-X) DEG C, controlling a steam on-off valve by adopting a pulse width modulation signal;
step two, when the steam on-off valve is controlled by adopting the pulse width modulation signal, the following three rules are followed:
a. selecting a pulse width rule according to conditions: dividing the material liquid weight value of the current feeding tank and the material liquid temperature value of the feeding tank according to the value areas, so that different value combinations respectively use different modulation modes to generate high and low levels;
b. high level pulse width calculation rule: mainly correlating the high-level conduction time with the weight value of the feed liquid in the feeding tank body, and selecting a fixed value or a calculation formula according to a pulse width rule selected according to conditions to obtain the high-level pulse conduction time; namely the time region in which the high-level pulse width enables the steam on-off valve to be opened;
c. low level pulse width calculation rule: mainly correlating the low-level conduction time with the temperature value of the feed liquid in the feeding tank body, and selecting a fixed value or a calculation formula according to a pulse width rule selected by conditions to obtain the low-level pulse conduction time; i.e., the time region in which the low-level pulse width causes the steam cutoff valve to close.
2. The method for controlling the temperature of the pulse width modulation tobacco charging barrel according to claim 1, wherein in the first step, the value of X is set according to the temperature characteristic when the equipment is debugged, and the value range of X is 0.1-1 ℃.
3. The method of claim 1, wherein the pulse width modulation signal has a high and low level pulse width calculation rule as follows:
when the weight of the feed liquid in the tank body is larger than W1, the set value of the pulse on-time is T1, and the set value of the pulse off-time is T2;
when the weight of the feed liquid in the tank body is smaller than W1 and larger than W2, the set value of the pulse conduction time is equal to the weight value/W1T 1 of the feed liquid in the current tank; the pulse off time set point is selected to be T3 or T4 according to the current tank temperature;
when the weight of the feed liquid in the tank body is less than W2, the pulse on-time set value is 0, and the pulse off-time set value is T2.
4. The method of claim 3, wherein when the weight of the feed liquid in the canister is less than W1 and greater than W2, the pulse on time setting is current weight of feed liquid in the canister/W1T 1; the conditions for determining the pulse off time set value are as follows: when the temperature of the tank is lower than 53 ℃, the set value of the pulse turn-off time is T3; when the tank temperature is higher than 53 ℃ and lower than (55-X) DEG C, the pulse-off time set value is T4.
5. The method for controlling the temperature of the pulse width modulated tobacco feeding cylinder according to claim 3 or 4, wherein W1 is an empirical value of the weight of the feeding liquid in the feeding tank during actual production, the value is an average value of the total weight of a plurality of batches of feeding liquid and ranges from 130 kg to 150kg, W2 is a weight value of the feeding liquid when the temperature of the feeding liquid begins to decrease after the heat preservation effect of the tank body fails during the production process of the feeding machine, the value ranges from 2 kg to 10kg, T1 is a short-time fixed value of 1 and the value ranges from 10S to 30S; t2 is a long-time fixed value of 2, and the value range is 200-400S; t3 is a short-time fixed value of 3, and the value range is 40-60S; t4 is a long-time constant value of 4, and the value range is 400-600S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110785958.6A CN113589865B (en) | 2021-07-12 | 2021-07-12 | Tobacco charging barrel temperature control method based on pulse width modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110785958.6A CN113589865B (en) | 2021-07-12 | 2021-07-12 | Tobacco charging barrel temperature control method based on pulse width modulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113589865A true CN113589865A (en) | 2021-11-02 |
| CN113589865B CN113589865B (en) | 2022-07-19 |
Family
ID=78247097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110785958.6A Active CN113589865B (en) | 2021-07-12 | 2021-07-12 | Tobacco charging barrel temperature control method based on pulse width modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113589865B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856526A (en) * | 2021-11-05 | 2021-12-31 | 安徽中烟工业有限责任公司 | Temperature control method for feeding material liquid tank |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883232A (en) * | 2003-11-25 | 2006-12-20 | 株式会社东芝 | Heating cooking instrument, cooking tool, and heating cooking system |
| CN101634779A (en) * | 2008-07-25 | 2010-01-27 | 塔工程有限公司 | Method for controlling amount of droplets of liquid crystal discharged each times |
| CN103043340A (en) * | 2012-12-07 | 2013-04-17 | 江苏永钢集团有限公司 | Wharf steel silo loading flow monitoring system and method |
| CN110771941A (en) * | 2019-09-30 | 2020-02-11 | 江苏中烟工业有限责任公司 | Heating temperature control method for adjusting threshold value of material tank based on weight of spice liquid |
| CN111496212A (en) * | 2020-06-08 | 2020-08-07 | 洛阳理工学院 | Automatic control method and system for liquid level of tundish |
-
2021
- 2021-07-12 CN CN202110785958.6A patent/CN113589865B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883232A (en) * | 2003-11-25 | 2006-12-20 | 株式会社东芝 | Heating cooking instrument, cooking tool, and heating cooking system |
| CN101634779A (en) * | 2008-07-25 | 2010-01-27 | 塔工程有限公司 | Method for controlling amount of droplets of liquid crystal discharged each times |
| CN103043340A (en) * | 2012-12-07 | 2013-04-17 | 江苏永钢集团有限公司 | Wharf steel silo loading flow monitoring system and method |
| CN110771941A (en) * | 2019-09-30 | 2020-02-11 | 江苏中烟工业有限责任公司 | Heating temperature control method for adjusting threshold value of material tank based on weight of spice liquid |
| CN111496212A (en) * | 2020-06-08 | 2020-08-07 | 洛阳理工学院 | Automatic control method and system for liquid level of tundish |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856526A (en) * | 2021-11-05 | 2021-12-31 | 安徽中烟工业有限责任公司 | Temperature control method for feeding material liquid tank |
| CN113856526B (en) * | 2021-11-05 | 2024-02-13 | 安徽中烟工业有限责任公司 | Temperature control method for feeding material liquid tank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113589865B (en) | 2022-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113589865B (en) | Tobacco charging barrel temperature control method based on pulse width modulation | |
| CN109633459B (en) | SOC interval dynamic curve correction method based on power battery application | |
| CN203715692U (en) | Temperature control system and vacuum air-cooling thermal treatment furnace | |
| CN104890205A (en) | Barrel temperature control method of injection molding machine | |
| JP6470243B2 (en) | Core molding apparatus and core molding method | |
| CN207483612U (en) | Full-automatic optical fibre drawing cooling system | |
| CN110771941B (en) | Heating temperature control method for adjusting threshold value of material tank based on weight of spice liquid | |
| CN206869030U (en) | A kind of toothed roll crusher roller tooth casting system | |
| CN106482180B (en) | Semiconductor microwave oven and its method for heating and controlling and device | |
| CN208142277U (en) | A kind of lead-acid accumulator mixing paste means for feeding acid | |
| CN103861678B (en) | A kind of heating kettle of energy automatic water supplement | |
| CN103184475B (en) | A kind of control method of the regular burner hearth of aluminium cell | |
| CN206869058U (en) | Avoid the adjusting means and conticaster that mould liquid level fluctuates | |
| CN104192874A (en) | Method for producing fused magnesite by virtue of high-power electric arc furnace | |
| CN203315386U (en) | Temperature control device of hot air sterilizer | |
| CN209725183U (en) | A kind of piston plate and piston component, feeding device comprising it | |
| CN213110767U (en) | A storage device for storing paste material | |
| CN204434287U (en) | Iron lithium phosphate continuous preparation device | |
| WO2020129982A1 (en) | Resin sealing method, resin sealing die, and resin sealing device | |
| CN105779702A (en) | VD furnace with molten steel temperature control device and control method of VD furnace | |
| CN208500364U (en) | A kind of binary graphitizing furnace | |
| CN207465681U (en) | Vulcanizing tank | |
| CN208760946U (en) | Myopia ointment filling machine | |
| CN106362640A (en) | Cylindrical lithium battery material preparing system | |
| CN201947806U (en) | Electric disinfecting powder sprayer for silkworm raising |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |