CN112030507B - Method for controlling water supply and temperature of boiler iron by adopting double NTC - Google Patents
Method for controlling water supply and temperature of boiler iron by adopting double NTC Download PDFInfo
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- CN112030507B CN112030507B CN202010780250.7A CN202010780250A CN112030507B CN 112030507 B CN112030507 B CN 112030507B CN 202010780250 A CN202010780250 A CN 202010780250A CN 112030507 B CN112030507 B CN 112030507B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 167
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 20
- 239000013589 supplement Substances 0.000 claims abstract description 26
- 238000002360 preparation method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims description 50
- 238000005086 pumping Methods 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract description 14
- 238000001514 detection method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F75/00—Hand irons
- D06F75/08—Hand irons internally heated by electricity
- D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
- D06F75/14—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F75/00—Hand irons
- D06F75/08—Hand irons internally heated by electricity
- D06F75/26—Temperature control or indicating arrangements
- D06F75/265—Temperature indicating arrangements; Control knobs
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention provides a method for controlling water replenishing and temperature by using double NTCs (negative temperature coefficient) of a boiler iron, which solves the problem that the judgment of temperature and water replenishing is not accurate by using a probe to detect in the prior art; the control states of the method comprise a preheating state S100, a preparation state S200, a working state S300 and a water tank waterless alarm state S400; NTC _ b is an NTC installed at the bottom position of the boiler; NTC _ s is an NTC arranged at the side position of the boiler; and switching among the preheating state S100, the preparation state S200, the working state S300 and the water tank no-water alarming state S400 according to the monitored parameter value changes of the boiler bottom position NTC _ b and the boiler side NTC _ S so as to control water supplement and temperature. The method is more accurate in temperature control and water supplement judgment.
Description
Technical Field
The invention relates to the technical field of control of boiler irons, in particular to a method for controlling water supply and temperature of a boiler iron by adopting double NTC.
Background
In a conventional boiler iron, a water level detection function is required for water supplement control of the boiler, and a temperature monitoring function (NTC) is required for control of the boiler. The boiler water level detection function has traditionally been detected using metal probes. Structurally, a probe needs to be introduced into a closed boiler space, so that the production requirement on the boiler is high; from the control board aspect, the probe contacts water, the outer wall of the boiler is grounded, and the control board power supply is required to be isolated in order to prevent electric leakage. The isolated power supply has the advantages that more devices are added in the aspect of the measure for EMC, the cost is much higher, and the problem that misjudgment is caused when boiler water is boiled by adopting a probe to detect is solved.
The problem that temperature and water supplement judgment is inaccurate in the prior art by adopting probe detection is solved.
Disclosure of Invention
In order to solve the problem that the judgment on the temperature and the water supplement is inaccurate by adopting probe detection in the prior art, the method for controlling the water supplement and the temperature of the boiler iron provided by the invention can solve the problem that the judgment on the temperature and the water supplement is inaccurate by adopting probe detection, the temperature is more accurately controlled, and the water supplement judgment is more accurate.
In a first aspect, the present application provides a method for controlling water supply and temperature of a boiler iron by using a dual NTC;
the control states of the method comprise a preheating state S100, a preparation state S200, a working state S300 and a water tank waterless alarm state S400; and simultaneously deploying NTCs at the bottom position of the boiler and the side position of the boiler, and switching among a preheating state S100, a preparation state S200, a working state S300 and a water tank waterless alarm state S400 according to the monitored parameter value changes of the NTCs at the bottom position of the boiler and the NTCs at the side position of the boiler so as to control water supplement and temperature.
Further, NTC _ b is defined as NTC installed at the bottom position of the boiler; NTC _ s is an NTC arranged at the side position of the boiler;
NTCs _1 is a preheating completion temperature judgment point; NTCs _2 is a gear temperature control point in the working state; NTCb _1 is a first heating temperature point in a preheating stage; NTCb _2 is a water supplement judgment point in the preheating stage; NTCb _3 is a water supplement judgment point in the working stage; NTCb _4 is a forced heating protection temperature point in the working stage; t1 is the water replenishing duration of the preheating stage; t2 is the water replenishing duration of the working stage; the relationship among the parameters is as follows: NTCs _1< NTCs _ 2; NTCb _1< NTCb _2< NTCb _3< NTCb _ 4; t2< T1;
and switching among the preheating state S100, the preparation state S200, the working state S300 and the water tank no-water alarm state S400 according to the change of the parameter values so as to control water supplement and temperature.
Further, since the NTC _ b is completely attached to the bottom of the boiler, the temperature rises slowly when water is present in the boiler, and rises rapidly when water is present in the boiler, the state of the water in the boiler can be reflected by the NTC _ b.
Furthermore, the NTC _ s is positioned on the side wall of the boiler, and the temperature is high when the steam pressure in the boiler is high; when the steam pressure in the boiler is small, the temperature is low, so that the condition of the steam quantity in the boiler can be reflected by NTC _ s.
Further, the temperature rising slopes of NTC _ b and NTC _ s when water is present in the boiler are different from the temperature rising slopes of NTC _ b and NTC _ s when water is absent in the boiler, thereby determining the presence or absence of water in the boiler.
Further, the heating pipe is located at the bottom, and the final water amount in the boiler is controlled below the NTC _ s horizontal position.
Further, T2< T1, the preheating stage can be supplemented with water for a long time, the working stage cannot be supplemented with water for a long time, and the phenomenon that a large amount of cold water enters the boiler to cause steam cut off when a user is using the steam function is prevented.
Further, the preheating state S100 includes the steps of:
s101: NTCb _1 is a first heating temperature point in a preheating stage, heating is carried out when NTC _ b is smaller than NTCb _1, heating is stopped when NTC _ b is larger than NTCb _1, and the step S102 is carried out after a period of time; NTCs _1 is a preheating completion temperature judgment point, and if NTC _ S is not less than NTCs _1 after being electrified from a hot state, the method enters a preparation state S200;
s102: starting heating, and entering step S103;
s103: NTCb _2 is a water supplement judgment point in the preheating stage, and if NTC _ b is larger than or equal to NTCb _2, NTC _ S is smaller than NTCs _1 and no water exists in the boiler, the step S104 is executed; if NTC _ b is less than NTCb _2 when NTC _ S is more than or equal to NTCs _1, water exists in the boiler and preheating is finished, entering a preparation state S200;
s104: water replenishing action, namely closing heating, and continuously pumping water for T1 seconds into a boiler water inlet; judging whether NTC _ b is obviously reduced or not, and returning to the step S102 if the NTC _ b is obviously reduced; otherwise, it indicates that there is no water in the water tank of the iron, and the water tank is in the no-water state S400.
Further, the preparation state S200 includes the following steps:
s201: judging at any time, and entering a working state S300 when detecting that a user controls the steam outlet valve to be opened;
s202: when NTC _ s < NTCs _1, heating is started; when NTC _ s is larger than or equal to NTCs _1, the heating is closed; keeping the boiler at a certain temperature; entering a water supplementing step S203 when NTC _ b is larger than or equal to NTCb _ 2;
s203: water replenishing action, namely closing heating, and continuously pumping water for T1 seconds into a boiler water inlet; judging whether NTC _ b is obviously reduced or not, and returning to the step S202 if the NTC _ b is obviously reduced; otherwise, it indicates that there is no water in the water tank of the iron, and the water tank is in the no-water state S400.
Further, the working state S300 includes the following steps:
s301: when the user does not operate the steam outlet valve, NTCs _2 is a gear temperature control point in the working state, and when NTC _ s is less than NTCs _2, heating is started; when NTC _ s is larger than or equal to NTCs _2, the heating is closed;
s302: when a user operates the steam outlet valve, forcibly heating; NTCb _4 is a forced heating protection temperature point in the working phase, and when NTCb is more than or equal to NTCb _4, heating is closed;
s303: NTCb _3 is a water supplement judgment point in the working stage; at any time, judging whether NTC _ b is obviously reduced or not when NTCb is larger than or equal to NTCb _3 and water is sucked from the water inlet for T2 seconds, and entering a water tank no-water state S400 when no obvious reduction is detected.
Further, the water tank no-water state S400 includes turning off heating, turning off the steam outlet valve, waiting for the user to replenish the water tank, and operating the water replenishing button to indicate that the water tank of the system has replenished water, and the system returns to the preheating state S100.
Compared with the prior art, the method for controlling the water replenishing and the temperature of the boiler iron provided by the invention adopts the double NTC, utilizes the double temperature monitoring function NTC, solves the problem that the judgment on the temperature and the water replenishing is not accurate due to the adoption of the probe for detection, and solves the problems that the probe is required to be introduced into a closed boiler space, the production requirement on the boiler is higher, the electric leakage is possible, and the boiler water is judged by mistake when boiling; the NTC with the double temperature monitoring function is utilized, a probe does not need to be introduced into a closed boiler space, the production requirement is reduced, the cost is also reduced, the possibility of electric leakage is avoided, and the judgment of water supplementing and temperature control is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a method for controlling water supply and temperature by using a double NTC for a boiler iron according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Furthermore, the technical features designed in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
The present invention provides a method for controlling water supply and temperature by using double NTC for a boiler iron, as shown in FIG. 1;
the control states of the method comprise a preheating state S100, a preparation state S200, a working state S300 and a water tank waterless alarm state S400; and simultaneously deploying NTCs at the bottom position of the boiler and the side position of the boiler, and switching among a preheating state S100, a preparation state S200, a working state S300 and a water tank waterless alarm state S400 according to the monitored parameter value changes of the NTCs at the bottom position of the boiler and the NTCs at the side position of the boiler so as to control water supplement and temperature.
In specific implementation, the NTC _ b is defined as the NTC installed at the bottom of the boiler; NTC _ s is an NTC arranged at the side position of the boiler;
NTCs _1 is a preheating completion temperature judgment point; NTCs _2 is a gear temperature control point in the working state; NTCb _1 is a first heating temperature point in a preheating stage; NTCb _2 is a water supplement judgment point in the preheating stage; NTCb _3 is a water supplement judgment point in the working stage; NTCb _4 is a forced heating protection temperature point in the working stage; t1 is the water replenishing duration of the preheating stage; t2 is the water replenishing duration of the working stage; the relationship among the parameters is as follows: NTCs _1< NTCs _ 2; NTCb _1< NTCb _2< NTCb _3< NTCb _ 4; t2< T1;
and switching among the preheating state S100, the preparation state S200, the working state S300 and the water tank no-water alarm state S400 according to the change of the parameter values so as to control water supplement and temperature.
Specifically, the NTC _ b is completely attached to the bottom of the boiler, so that the temperature rises slowly when water is present in the boiler, and rises rapidly when water is present in the boiler, and thus the state of the water in the boiler can be reflected by the NTC _ b.
Specifically, the NTC _ s is positioned on the side wall of the boiler, and when the steam pressure in the boiler is high, the temperature is high; when the steam pressure in the boiler is small, the temperature is low, so that the condition of the steam quantity in the boiler can be reflected by NTC _ s.
Specifically, the temperature rising slopes of NTC _ b and NTC _ s in the presence of water in the boiler are different from the temperature rising slopes of NTC _ b and NTC _ s in the absence of water in the boiler, thereby determining the presence or absence of water in the boiler.
Specifically, the heating tube is located at the bottom, and the final water amount in the boiler is controlled below the NTC _ s horizontal position.
Specifically, T2< T1, the preheating stage can replenish water for a long time, the working stage cannot replenish water for a long time, and the phenomenon that a large amount of cold water enters the boiler to cause steam cut off when a user is using the steam function is prevented.
In specific implementation, the preheating state S100 includes the following steps:
s101: NTCb _1 is a first heating temperature point in a preheating stage, heating is carried out when NTC _ b is less than NTCb _1, heating is stopped when NTC _ b is more than NTCb _1, and the step S102 is carried out after a period of time; NTCs _1 is a preheating completion temperature judgment point, and if NTC _ S is not less than NTCs _1 after being electrified from a hot state, the method enters a preparation state S200;
s102: turning on heating, and entering step S103;
s103: NTCb _2 is a water replenishing judgment point in the preheating stage, and if NTC _ S is less than NTCs _1 and no water exists in the boiler when NTC _ b is greater than or equal to NTCb _2, the step S104 is carried out; if NTC _ S is larger than or equal to NTCs _1, NTC _ b is smaller than NTCb _2, water exists in the boiler, and preheating is completed, then entering a preparation state S200;
s104: water replenishing action, namely closing heating, and continuously pumping water for T1 seconds into a boiler water inlet; judging whether NTC _ b is obviously reduced or not, and returning to the step S102 if the NTC _ b is obviously reduced; otherwise, it indicates that there is no water in the water tank of the iron, and the water tank is in the no-water state S400.
In specific implementation, the preparation state S200 includes the following steps:
s201: judging at any time, and entering a working state S300 when detecting that a user controls the steam outlet valve to be opened;
s202: when NTC _ s < NTCs _1, heating is started; when NTC _ s is larger than or equal to NTCs _1, the heating is closed; keeping the boiler at a certain temperature; entering a water supplementing step S203 when NTC _ b is larger than or equal to NTCb _ 2;
s203: water replenishing, namely closing heating, and continuously pumping water for T1 seconds into a water inlet of the boiler; judging whether NTC _ b is obviously reduced or not, and returning to the step S202 if the NTC _ b is obviously reduced; otherwise, it indicates that there is no water in the water tank of the iron, and the water tank is in the no-water state S400.
In specific implementation, the working state S300 includes the following steps:
s301: when the user does not operate the steam outlet valve, NTCs _2 is a gear temperature control point in the working state, and when NTC _ s is less than NTCs _2, heating is started; when NTC _ s is larger than or equal to NTCs _2, the heating is closed;
s302: when a user operates the steam outlet valve, forcibly heating; NTCb _4 is a forced heating protection temperature point in the working phase, and when NTCb is more than or equal to NTCb _4, heating is closed;
s303: NTCb _3 is a water supplement judgment point in the working stage; at any time, judging whether NTC _ b is obviously reduced or not when NTCb is larger than or equal to NTCb _3 and water is sucked from the water inlet for T2 seconds, and entering a water tank anhydrous state S400 when no obvious reduction is detected.
In specific implementation, the water tank no-water state S400 includes turning off heating, turning off the steam outlet valve, waiting for a user to replenish the water tank, and operating the water replenishment button to prompt the system that the water tank has replenished water, and the system returns to the preheating state S100.
Compared with the prior art, the method for controlling the water and temperature of the boiler iron provided by the invention adopts the double NTC, utilizes the double temperature monitoring function NTC, solves the problem that the judgment on the temperature and the water supplement is not accurate due to the adoption of probe detection, and solves the problems that the production requirement of a boiler is higher due to the introduction of a probe into a closed boiler space, the electric leakage is possible, and the boiler water is judged by mistake during boiling; the NTC with the double temperature monitoring function is utilized, a probe does not need to be introduced into a closed boiler space, the production requirement is reduced, the cost is also reduced, the possibility of electric leakage is avoided, and the judgment of water supplementing and temperature control is more accurate.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for controlling water supply and temperature by using double NTC for a boiler iron is characterized by comprising the following steps:
the control states of the method comprise a preheating state S100, a preparation state S200, a working state S300 and a water tank waterless alarm state S400; simultaneously deploying NTCs at the bottom position of the boiler and the side position of the boiler, and switching the preheating state S100, the preparation state S200, the working state S300 and the water tank waterless alarm state S400 according to the monitored parameter value changes of the NTC at the bottom position of the boiler and the NTC at the side position of the boiler so as to control water supplement and temperature;
wherein, NTC _ b is defined as NTC installed at the bottom position of the boiler; NTC _ s is an NTC arranged at the side position of the boiler;
NTCs _1 is a preheating completion temperature judgment point; NTCs _2 is a gear temperature control point in the working state; NTCb _1 is a first heating temperature point in a preheating stage; NTCb _2 is a water supplement judgment point in the preheating stage; NTCb _3 is a water supplement judgment point in the working stage; NTCb _4 is a forced heating protection temperature point in the working stage; t1 is the water replenishing duration of the preheating stage; t2 is the water replenishing duration of the working stage; the relationship among the parameters is as follows: NTCs _1< NTCs _ 2; NTCb _1< NTCb _2< NTCb _3< NTCb _ 4; t2< T1;
switching among the preheating state S100, the preparation state S200, the working state S300 and the water tank waterless alarm state S400 according to the change of the parameter value so as to control water supplement and temperature;
the working state S300 includes the steps of:
s301: when the user does not operate the steam outlet valve, NTCs _2 is a gear temperature control point in the working state, and when NTC _ s is less than NTCs _2, heating is started; when NTC _ s is larger than or equal to NTCs _2, the heating is closed;
s302: when a user operates the steam outlet valve, forcibly heating; NTCb _4 is a forced heating protection temperature point in the working phase, and when NTCb is more than or equal to NTCb _4, heating is closed;
s303: NTCb _3 is a water supplement judgment point in the working stage; at any time, judging whether NTC _ b is obviously reduced or not when NTCb is larger than or equal to NTCb _3 and water is sucked from the water inlet for T2 seconds, and entering a water tank no-water state S400 when no obvious reduction is detected.
2. The method for controlling watering and temperature by using a double NTC as claimed in claim 1, wherein the preheating state S100 comprises the steps of:
s101: NTCb _1 is a first heating temperature point in a preheating stage, heating is carried out when NTC _ b is smaller than NTCb _1, heating is stopped when NTC _ b is larger than NTCb _1, and the step S102 is carried out after a period of time; NTCs _1 is a preheating completion temperature judgment point, and if NTC _ S is not less than NTCs _1 after being electrified from a hot state, the method enters a preparation state S200;
s102: turning on heating, and entering step S103;
s103: NTCb _2 is a water supplement judgment point in the preheating stage, and if NTC _ b is larger than or equal to NTCb _2, NTC _ S is smaller than NTCs _1 and no water exists in the boiler, the step S104 is executed; if NTC _ b is less than NTCb _2 when NTC _ S is more than or equal to NTCs _1, water exists in the boiler and preheating is finished, entering a preparation state S200;
s104: water replenishing, namely closing heating, and continuously pumping water for T1 seconds into a water inlet of the boiler; judging whether NTC _ b is obviously reduced or not, and returning to the step S102 if the NTC _ b is obviously reduced; otherwise, it indicates that there is no water in the water tank of the iron, and the water tank is in the no-water state S400.
3. The method for controlling watering and temperature by using a double NTC for a boiler iron according to claim 1, wherein the preparation state S200 comprises the steps of:
s201: judging at any time, and entering a working state S300 when detecting that a user controls the steam outlet valve to be opened;
s202: when NTC _ s < NTCs _1, heating is started; when NTC _ s is larger than or equal to NTCs _1, the heating is closed; keeping the boiler at a certain temperature; entering a water supplementing step S203 when NTC _ b is larger than or equal to NTCb _ 2;
s203: water replenishing action, namely closing heating, and continuously pumping water for T1 seconds into a boiler water inlet; judging whether NTC _ b is obviously reduced or not, and returning to the step S202 if the NTC _ b is obviously reduced; otherwise, it indicates that there is no water in the water tank of the iron, and the water tank is in the no-water state S400.
4. The method for controlling water supply and temperature using a dual NTC of a boiler iron as claimed in claim 1, wherein the no water tank state S400 includes turning off heating, turning off a steam outlet valve, waiting for a user to replenish the water tank, and operating a water replenishment button to indicate to the system that the water tank is replenished with water, and the system returns to the preheating state S100.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1240471B (en) * | 1990-06-01 | 1993-12-17 | Nida S.R.L. | STEAM IRON, PERFECTED. |
| CN101245551B (en) * | 2007-02-15 | 2011-09-28 | 张雷 | Electric iron for continuously generating pressure steam |
| CN201184587Y (en) * | 2007-11-05 | 2009-01-21 | 邵博言 | Steam boiler with automatic water-feeding control system |
| WO2010031667A2 (en) * | 2008-09-22 | 2010-03-25 | BSH Bosch und Siemens Hausgeräte GmbH | Steam boiler for a domestic appliance with a refillable steam boiler and method for operating a steam boiler |
| CN102011296B (en) * | 2009-09-07 | 2012-05-02 | 佛山市顺德区盛熙电器制造有限公司 | Steam hanging iron and water deficiency automatic protection method thereof |
| DE102009055167B4 (en) * | 2009-12-22 | 2013-05-08 | BSH Bosch und Siemens Hausgeräte GmbH | Steam generator with actuator |
| CN201660784U (en) * | 2010-03-05 | 2010-12-01 | 何启烽 | Automatic water-feed ironing machine |
| CN203354933U (en) * | 2012-12-18 | 2013-12-25 | 黄伟聪 | Disinfection cabinet |
| EP3483335A1 (en) * | 2017-11-14 | 2019-05-15 | Vestel Elektronik Sanayi ve Ticaret A.S. | An apparatus for determining whether a device is in a first orientation or a second orientation |
| CN109706717B (en) * | 2019-01-23 | 2023-09-29 | 东莞市驰铭智能科技有限公司 | Ironing device capable of switching ironing modes |
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