CN105021644A - Detection method and system used for steam heating device - Google Patents
Detection method and system used for steam heating device Download PDFInfo
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- CN105021644A CN105021644A CN201510475513.2A CN201510475513A CN105021644A CN 105021644 A CN105021644 A CN 105021644A CN 201510475513 A CN201510475513 A CN 201510475513A CN 105021644 A CN105021644 A CN 105021644A
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- steam heater
- incrustation scale
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Abstract
The invention relates to the field of electric appliances, and discloses a detection method and system for a steam heating device. The steam heating device comprises a steam heating cavity and heating tubes. The method includes the steps that after the steam heating device operates for preset time, the temperature of the steam heating cavity is detected; the detected temperature is compared with a threshold value, and whether water scales exist in the steam heating device is determined according to the comparison result. Through the detection method and system, whether the water scales exist in the steam heating device can be determined through comparing the detected temperature of the steam heating cavity, and it is unnecessary to specially check product specifications to judge whether the water scales exist for users.
Description
Technical field
The present invention relates to appliance field, particularly, relate to a kind of detection method for steam heater and detection system.
Background technology
Along with people are day by day obvious to the requirement of health diet, steam cooking household appliances are as providing nutrition and the main cooking equipment of fresh and tender tasty food is more and more subject to the welcome of consumer.At present, steam cooking household appliances (such as electric steamer) all adopt the mode of heating water to obtain steam, this is for daily water consumption (such as tap water), it is inevitable for producing incrustation scale in the product, needs user to carry out clean cleaning before incrustation scale has a strong impact on product generation.At present, to the process of incrustation scale be also only limitted in product description give guide, cause user often because forget cleaning and need to make or have much ado to causing the steam copper of inefficacy to carry out maintenance maintenance because of incrustation scale.
Summary of the invention
The object of this invention is to provide a kind of detection method for steam heater and detection system, whether cannot there is the problem of incrustation scale by automatic decision to solve in prior art.
To achieve these goals, the invention provides a kind of detection method for steam heater, described steam heater comprises Steam Heating cavity and heating tube, wherein, the method comprises: after described steam heater runs the schedule time, detect the temperature of described Steam Heating cavity; And detected temperature and threshold value are compared, and determine whether described steam heater exists incrustation scale according to comparative result.
Present invention also offers a kind of detection system for steam heater, described steam heater comprises Steam Heating cavity and heating tube, wherein, this system comprises: pick-up unit, for detecting the temperature of described Steam Heating cavity after described steam heater runs the schedule time; And control device, being connected with described pick-up unit, for detected temperature and threshold value being compared, and determining whether described steam heater exists incrustation scale according to comparative result.
Pass through technique scheme, after described steam heater runs the schedule time, the temperature of described Steam Heating cavity is detected, and the temperature of detected Steam Heating cavity and threshold value are compared, just whether can there is incrustation scale according to comparative result determination steam heater thus, check product description specially to judge whether to there is incrustation scale without the need to user, and then can prepare for automatically prompting user clears up incrustation scale in time.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the process flow diagram of the detection method for steam heater according to one embodiment of the present invention;
Fig. 2 is the process flow diagram of the detection method for steam heater according to another embodiment of the present invention;
Fig. 3 is the block scheme of the detection system for steam heater according to one embodiment of the present invention;
Fig. 4 is the structural drawing of the steam heater according to one embodiment of the present invention;
Fig. 5 shows the schematic diagram of Temperature Distribution when having Non-scale to exist according to the steam heater of one embodiment of the present invention; And
The schematic diagram of different temperature variation curve when Fig. 6 shows according to the Non-scale of one embodiment of the present invention and there is incrustation scale and the break-make of heating tube, water pump or water valve.
Description of reference numerals
1 Steam Heating cavity 7 supplies water water pipe 8 steam generator
8a heating tube 8b steam-generator temperature sensor
10 water pumps or water valve 13 electrical links 18 water tank inlet
23 steam exhaust-gas mouth 24 Steam Heating cavity heat insulation foams
25 Steam Heating cavity thermal insulation board 30 pick-up units
32 control device 34 display device
36 sound prompt device 38 prompting devices
80 steam generator outer wall 81 steam generator inwalls
Incrustation scale surface 83 steam jets contacted with water in 82 steam generators
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the process flow diagram of the detection method for steam heater according to one embodiment of the present invention.Wherein, steam heater comprises Steam Heating cavity and heating tube.
As shown in Figure 1, a kind of detection method for steam heater provided by the invention comprises:
S100, after described steam heater runs the schedule time, detects the temperature of described Steam Heating cavity; And
S102, compares detected temperature and threshold value, and determines whether described steam heater exists incrustation scale according to comparative result.
Whether existence due to incrustation scale can make the temperature of Steam Heating cavity different, therefore by detecting the temperature of described Steam Heating cavity after described steam heater runs the schedule time, and the temperature of detected Steam Heating cavity and threshold value are compared, just whether can there is incrustation scale according to comparative result determination steam heater thus, check product description specially to judge whether to there is incrustation scale without the need to user, and then can prepare for automatically prompting user clears up incrustation scale in time.
In addition, due to steam heater from be heated to and reach thermal-stable state during, temperature is always in continuous change, such change procedure cannot realize the accurate judgement whether incrustation scale exists, therefore need to run the regular hour (namely, the above-mentioned schedule time) again temperature is detected, to guarantee the accuracy of judged result afterwards.
In the method, step S102 can comprise:
S1020, judges the temperature that detects whether all at least low than described threshold value predetermined value in scheduled time slot; If so, go to step S1022, otherwise go to step S100;
S1022, determines that described steam heater exists incrustation scale.
Usually, when there is incrustation scale, the temperature of Steam Heating cavity is usually less than the temperature in Non-scale situation.Therefore, when detected temperature in scheduled time slot all than described threshold value at least low predetermined value time, just can determine that steam heater exists incrustation scale.The judgment mode of whether predetermined value at least lower than threshold value like this, can obtain more accurate judged result.In addition, the relation of temperature and the threshold value detected in scheduled time slot due to what judge, thus the erroneous judgement whether incrustation scale that detected temperature can be avoided to cause by external environmental factor (hysteresis quality of such as pick-up unit) affects fluctuating up and down of causing exists.
Fig. 2 is the process flow diagram of the detection method for steam heater according to another embodiment of the present invention.Wherein, described steam heater also comprises water pump for supplying water to described steam heater or water valve.
In fig. 2, the S100 in step S100 and Fig. 1 is identical, and S202 can as the alternative embodiments of S102 in Fig. 1.
Particularly, as shown in Figure 2, S202 comprises:
S2020, judges the temperature that detects whether all at least low than described threshold value predetermined value in scheduled time slot; If so, go to step S2022, otherwise go to step S100;
S2022, judges that heating tube, water pump or water valve add up to use duration whether to be less than corresponding preset duration, if so, then goes to step S2024, otherwise go to step S2022;
S2024, determines that described steam heater exists incrustation scale;
S2026, determines that described heating tube, water pump or water valve are abnormal.
Namely, illustrated in Fig. 2 and determined the situation that incrustation scale exists as follows:
Situation 1: when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described heating tube is less than preset duration, determine that described steam heater exists incrustation scale.
Situation 2: when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described water pump or water valve is less than preset duration, determine that described steam heater exists incrustation scale.
Wherein, preset duration refers to the device such as heating tube, water pump or water valve serviceable life separately, and it is determined by the character of device itself, can set when product export, and the present invention does not limit this.Such as, the preset duration of heating tube can be such as 3000 hours, and the preset duration of water pump and water valve can be 500 hours.For threshold value, the schedule time, scheduled time slot and predetermined value, those skilled in the art can set according to actual conditions.Such as, threshold value can be set as 100 DEG C, and predetermined value can be set as 4 DEG C, and the schedule time can be 5 minutes, and scheduled time slot can be 1 minute.
Thus, can get rid of because the device aging of steam heater is (as device accumulation uses duration to exceed its serviceable life, there is the situation that the thermal efficiency reduces in heating tube, there is the situation that output declines in water pump or water valve) and the erroneous judgement of generation, the judgement whether incrustation scale is existed is more accurate.Meanwhile, also prepare for reminding user changes corresponding device in time.
According to one embodiment of the present invention, the method also comprises:
When determining that described steam heater exists incrustation scale, export the cue that there is incrustation scale.And determining in the heating tube of described steam heater, water pump or the abnormal situation of water valve, export the cue changing heating tube, water pump or water valve.
Thus, incrustation scale can be cleared up in time by reminding user, or change corresponding device in time, to avoid dangerous generation.
In addition, while exporting the cue changing heating tube, water pump or water valve, steam heater is controlled out of service.
Fig. 3 is the block scheme of the detection system for steam heater according to one embodiment of the present invention.Described steam heater comprises Steam Heating cavity and heating tube.
As shown in Figure 3, a kind of detection system for steam heater provided by the invention comprises:
Pick-up unit 30, for detecting the temperature of described Steam Heating cavity after described steam heater runs the schedule time; And
Control device 32, is connected with described pick-up unit 30, for detected temperature and threshold value being compared, and determines whether described steam heater exists incrustation scale according to comparative result.
Whether existence due to incrustation scale can make the temperature of Steam Heating cavity different, therefore by detecting the temperature of described Steam Heating cavity after described steam heater runs the schedule time, and the temperature of detected Steam Heating cavity and threshold value are compared, just whether can there is incrustation scale according to comparative result determination steam heater thus, check product description specially to judge whether to there is incrustation scale without the need to user, and then can prepare for automatically prompting user clears up incrustation scale in time.
According to one embodiment of the present invention, described control device 32 when detected temperature in scheduled time slot all than described threshold value at least low predetermined value, determine that described steam heater exists incrustation scale.
Usually, when there is incrustation scale, the temperature of Steam Heating cavity is usually less than the temperature in Non-scale situation.Therefore, when detected temperature in scheduled time slot all than described threshold value at least low predetermined value time, just can determine that steam heater exists incrustation scale.The judgment mode of whether predetermined value at least lower than threshold value like this, can obtain more accurate judged result.In addition, the relation of temperature and the threshold value detected in scheduled time slot due to what judge, thus the erroneous judgement whether incrustation scale that detected temperature can be avoided to cause by external environmental factor (hysteresis quality of such as pick-up unit) affects fluctuating up and down of causing exists.
Wherein, pick-up unit 30 can be steam heating cavity temperature sensor.For predetermined value, those skilled in the art can set according to actual conditions.
According to one embodiment of the present invention, described control device 32 when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described heating tube is less than preset duration, determine that described steam heater exists incrustation scale.And described control device 32 when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described heating tube is greater than preset duration, determine that described heating tube is abnormal.
According to one embodiment of the present invention, described steam heater also comprises water pump for supplying water to described steam heater or water valve, described control device 32 when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described water pump or water valve is less than preset duration, determine that described steam heater exists incrustation scale.And described control device 32 when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described water pump or water valve is greater than preset duration, determine described water pump or water valve abnormal.
Thus, can get rid of the erroneous judgement produced because of the device aging (as device accumulation uses duration to exceed its serviceable life) of steam heater, the judgement whether incrustation scale is existed is more accurate.Meanwhile, also prepare for reminding user changes corresponding device in time.
According to one embodiment of the present invention, described control device 32, also for when determining that described steam heater exists incrustation scale, exports the cue that there is incrustation scale.And determining in the heating tube of described steam heater, water pump or the abnormal situation of water valve, export the cue changing heating tube, water pump or water valve.
Thus, incrustation scale can be cleared up in time by reminding user, or change corresponding device in time, to avoid dangerous generation.
In addition, while exporting the cue changing heating tube, water pump or water valve, steam heater is controlled out of service.
According to one embodiment of the present invention, this system also comprises display device 34, and described display device 34 is also for showing the information that there is incrustation scale or the information changing described heating tube, water pump or water valve.
According to one embodiment of the present invention, this system also comprises sound prompt device 36, for sending the prompt tone that there is incrustation scale or the prompt tone changing described heating tube, water pump or water valve.This sound prompt device 36 can send prompt tone while display device 34 shows corresponding information, also can send prompt tone separately when display device 34 does not show information.Send prompt tone by sound prompt device 36, can when user is inconvenient to check display device 34 displaying contents or display device fault when in time reminding user operate.Wherein, this sound prompt device 36 can adopt hummer or loudspeaker.
In addition, this system can also comprise prompting device 38, for sending corresponding prompting light according to described cue (there is any one in the cue of incrustation scale cue, replacing heating tube, water pump or water valve).This prompting device 38 can work with at least one in above-mentioned display device 34 and sound prompt device 36 simultaneously, also can work independently when above-mentioned display device 34 does not show information and sound prompt device does not send prompt tone.Wherein, this prompting device 38 can be light emitting diode (LED).The prompting light of different colours can be sent for different cues.
According to one embodiment of the present invention, this system can also comprise storer, for recording the accumulative use duration of the heating tube of described steam heater, water pump and water valve from dispatching from the factory.Wherein, this storer can be nonvolatile memory, such as EPPROM or flash memory (Flash ROM).When the device of steam heater, because accumulative use duration exceedes serviceable life, after being replaced, this storer resets the accumulative use duration recorded.
Fig. 4 is the structural drawing of the steam heater according to one embodiment of the present invention.Wherein, heating tube 8a is included in steam generator 8.Steam generator 8 adopts metal (the such as aluminium that thermal conductivity is relatively high, alternatively, can also be stainless steel) as body, this metallic walls is arranged on steam generator heating tube 8a and holds to realize electricity separation between water vapor chamber, and steam-generator temperature sensor 8b is arranged in this layer of metallic walls.
Fig. 5 shows the schematic diagram of Temperature Distribution when having Non-scale to exist according to the steam heater of one embodiment of the present invention.Wherein, temperature distribution history when curve A represents that Non-scale exists, and temperature distribution history when curve B indicates that incrustation scale exists.
The schematic diagram of different temperature variation curve when Fig. 6 shows according to the Non-scale of one embodiment of the present invention and there is incrustation scale and the break-make of heating tube, water pump or water valve.
Wherein, the break-make of water pump or water valve is determined based on the temperature information of steam heating cavity temperature sensor 30, and the break-make of the heating tube 8a of steam generator 8 is determined by steam-generator temperature sensor 8b.Determine that mode can adopt existing mode in prior art particularly, the present invention repeats no more this.In addition, the accumulative service time of water pump or water valve is longer, output correspondingly also can decline, and the decline of output can cause steam-generator temperature sensor 8b arrive break-off signal quickly and get back to the temperature of conducting again more behindhand, the ON time of steam generator can reduce thus, correspondingly causes heating tube 8a to produce less heat and is supplied to Steam Heating cavity 1.
Deposit in case at Non-scale, when identical water supply make-to-break ratio (being determined by steam heating cavity temperature sensor), if the break-make of heating tube 8a is determined by steam-generator temperature sensor 8b, the ON time of heating tube 8a can be shorter than there being the time of incrustation scale.Loop graph see the amplification shown in left side in Fig. 5 is known, although higher as the metallic thermal conductivity of steam generator chamber wall, steam generator outer wall 80 and steam generator inwall 81 can exist the temperature difference.Exactly because and have the temperature difference, the heat that steam generator heating tube 8a could be allowed to produce is moved to water by the difference of height of temperature over there.When there is no incrustation scale, steam generator inwall 81 directly contacts with water, because water will absorb a large amount of heat energy (2256J/g) and temperature immobilizes (100 DEG C), so the temperature of steam generator inwall 81 is also locked in 100 DEG C when vaporizing (phase transformation); On the other hand, steam generator outer wall 80 is not with water contact, so its temperature will between steam generator heating tube 8a surface and steam generator inwall 81, and the temperature detected by steam-generator temperature sensor 8b, substantially be the temperature of steam generator outer wall 80, or closely.So after there is incrustation scale in steam generator 8, the cross section contacted with water is no longer steam generator inwall 81, but incrustation scale surface (the incrustation scale surface 82 namely contacted with water in steam generator).Simultaneously, because incrustation scale itself is not that (thermal conductivity is no more than 10J/ (g*K) to hot good conductor, also less than 1/30 of aluminium), cause the temperature of steam generator inwall 81 to start higher than 100 DEG C, also therefore raise to cause the temperature measured by steam generator outer wall 80 and steam-generator temperature sensor 8b.Namely, due to the existence of this undesirable heat conductor of incrustation scale, the heat energy causing steam generator heating tube 8a to produce can not be delivered to rapidly in the water of needs vaporization, wherein a part of heat is made to be used for improve the temperature of steam generator container wall, revert to the heat transfer rate of that abundance when not having incrustation scale (heat transfer rate and thermal conductivity and temperature difference height are directly proportional to allow it, when having an incrustation scale, thermal conductivity declines, so will recover same heat transfer rate by improving the temperature difference).Obviously, do not act in water for this part energy improving steam generator 8 temperature, the steam production of steamer generator 8 is declined.Now the temperature of Steam Heating cavity can be under-supply and decline due to the quantity of steam carrying heat.Because the break-make of steam generator heating tube 8a is regulated by the information of steam-generator temperature sensor 8b, have nothing to do, so Steam Heating cavity temperature will operate in lower level always with steam heating cavity temperature sensor 30.Temperature rise curve specifically shown in Figure 6.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. for a detection method for steam heater, described steam heater comprises Steam Heating cavity and heating tube, and wherein, the method comprises:
After described steam heater runs the schedule time, detect the temperature of described Steam Heating cavity; And
Detected temperature and threshold value are compared, and determines whether described steam heater exists incrustation scale according to comparative result.
2. method according to claim 1, wherein, when detected temperature in scheduled time slot all than described threshold value at least low predetermined value, determine that described steam heater exists incrustation scale.
3. method according to claim 1, wherein, when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described heating tube is less than preset duration, determine that described steam heater exists incrustation scale.
4. method according to claim 1, wherein,
Described steam heater also comprises water pump for supplying water to described steam heater or water valve,
When detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described water pump or water valve is less than preset duration, determine that described steam heater exists incrustation scale.
5. the method according to any one of claim 1-4, wherein, the method also comprises:
When determining that described steam heater exists incrustation scale, export the cue that there is incrustation scale.
6. for a detection system for steam heater, described steam heater comprises Steam Heating cavity and heating tube, and wherein, this system comprises:
Pick-up unit, for detecting the temperature of described Steam Heating cavity after described steam heater runs the schedule time; And
Control device, is connected with described pick-up unit, for detected temperature and threshold value being compared, and determines whether described steam heater exists incrustation scale according to comparative result.
7. system according to claim 6, wherein, described control device when detected temperature in scheduled time slot all than described threshold value at least low predetermined value, determine that described steam heater exists incrustation scale.
8. system according to claim 6, wherein, described control device when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described heating tube is less than preset duration, determine that described steam heater exists incrustation scale.
9. system according to claim 6, wherein,
Described steam heater also comprises water pump for supplying water to described steam heater or water valve,
Described control device when detected temperature in scheduled time slot all than at least low predetermined value of described threshold value and the accumulative use duration of described water pump or water valve is less than preset duration, determine that described steam heater exists incrustation scale.
10. the system according to any one of claim 6-9, wherein, described control device, also for when determining that described steam heater exists incrustation scale, exports the cue that there is incrustation scale.
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| CN110537845A (en) * | 2019-08-13 | 2019-12-06 | 华帝股份有限公司 | scale detection device and detection method for steam cooking device |
| CN111930159A (en) * | 2020-07-09 | 2020-11-13 | 广东美的厨房电器制造有限公司 | Control method of steam device, household appliance and storage medium |
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| CN109406116A (en) * | 2018-08-30 | 2019-03-01 | 珠海格力电器股份有限公司 | Scale detection method and liquid heating apparatus |
| CN110537845A (en) * | 2019-08-13 | 2019-12-06 | 华帝股份有限公司 | scale detection device and detection method for steam cooking device |
| CN113803643A (en) * | 2020-06-17 | 2021-12-17 | 杭州九阳小家电有限公司 | Pipeline detection method of food processor |
| CN111930159A (en) * | 2020-07-09 | 2020-11-13 | 广东美的厨房电器制造有限公司 | Control method of steam device, household appliance and storage medium |
| CN111930159B (en) * | 2020-07-09 | 2021-12-31 | 广东美的厨房电器制造有限公司 | Control method of steam device, household appliance and storage medium |
| CN115016376A (en) * | 2022-06-27 | 2022-09-06 | 常州聚能信息科技有限公司 | Intelligent online monitoring system and method based on Internet of things |
| CN115016376B (en) * | 2022-06-27 | 2024-04-26 | 西安实达同创测控设备有限公司 | Intelligent online monitoring system and method based on Internet of things |
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