CN109682580B - Range hood impeller maintenance time limit judgment and test method - Google Patents
Range hood impeller maintenance time limit judgment and test method Download PDFInfo
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- CN109682580B CN109682580B CN201710968582.6A CN201710968582A CN109682580B CN 109682580 B CN109682580 B CN 109682580B CN 201710968582 A CN201710968582 A CN 201710968582A CN 109682580 B CN109682580 B CN 109682580B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
A method for judging and testing maintenance period of an impeller of a range hood is characterized by comprising ① cleaning critical value determination, ② formula oil circuit acceleration test, wherein test oil and test water are added into a test pot to enable the test pot to generate oil smoke, the test times and the impeller weight increasing condition are recorded, ③ calculates the acceleration times, the impeller weight increasing value after each formula oil circuit acceleration test is calculated according to the test times and the impeller weight increasing condition, ④ calculates data corresponding to each maintenance year limit, the impeller weight increasing value in each period is calculated according to the acceleration times and the impeller weight increasing values after the range hood is used each time in different periods, and then the maintenance period of a certain machine type impeller to be tested is judged according to the impeller weight increasing value in each period.
Description
Technical Field
The invention relates to maintenance of an impeller of a range hood, in particular to a method for determining a maintenance period.
Background
After the impeller of the range hood is used for a certain time, oil on the impeller can accumulate different grease weights along with the use time. The grease weight accumulation to a certain degree can have certain influence on the performance (including air quantity, noise and the like) of the range hood, the service life of a motor and the like. It is desirable to determine the maintenance window for the impeller to facilitate periodic maintenance and cleaning to ensure long-term, effective service. The maintenance period of impellers of different types is long and needs to be measured by a method.
If the maintenance period is counted according to normal use, there is a disadvantage that the period is long, two years short, and five years long, and if the maintenance period is counted by laboratory tests, although desired data can be obtained in a short time, it is difficult to ensure accuracy and scientificity of the result, and therefore, it is necessary to combine actual use.
To date, no information has been disclosed on how researchers in this field could scientifically obtain the life span of an impeller through a limited number of tests.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for rapidly and accurately judging the maintenance period of the impeller of the range hood by using an accelerated test in a laboratory aiming at the technical current situation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for judging and testing maintenance period of an impeller of a range hood is characterized by comprising the following steps
①, determining a cleaning critical value, visiting a user, collecting data, selecting typical data as an analysis object, testing the weight increasing condition of the impeller, finally determining the cleaning critical value of the impeller and calculating the weight increasing value of the impeller after the user uses the range hood every time in different periods;
② formula oil circuit accelerated test, adding test oil and test water into a test pan to generate oil smoke, and recording test times and weight increase condition of impeller;
③, calculating acceleration times, and calculating the weight gain value of the impeller after each formula oil path acceleration test according to the test times and the weight gain condition of the impeller;
④ calculating the data corresponding to each maintenance time limit, calculating the impeller weight gain value of each time limit according to the acceleration multiple and the weight gain value of the impeller after the range hood is used each time in different time limits, and then judging the maintenance time limit of the impeller of a certain machine type to be tested according to the impeller weight gain value of each time limit.
Further, the data collected in step ① includes oil type, range hood frequency, time of use, number of dishes made, meat and vegetables matching.
Preferably, the impeller cleaning threshold of step ① is 200g, and this cleaning threshold is reached within 2 years.
In a further step ①, the food is cooked twice a day for each household, the maintenance period is 2 years, the weight gain value of the rear impeller of the range hood after each use is rounded to 200/2/365/2 ═ 0.137g, the maintenance period is 3 years, the weight gain value of the rear impeller of the range hood after each use is rounded to 200/3/365/2 ═ 0.091g, the maintenance period is 4 years, the weight gain value of the rear impeller of the range hood after each use is rounded to 200/4/365/2 ═ 0.068g, the maintenance period is 5 years, and the weight gain value of the rear impeller of the range hood after each use is rounded to 200/5/365/2 ═ 0.055 g.
Preferably, the formula oil path accelerated test condition in the step ② is that test oil is added into a test pot, then test water is sprayed into the pot reaching a certain temperature by an automatic dropping device to generate oil smoke, the heating temperature of the test pot is set to be 280 ℃, the dropping frequency is 2 seconds and 8 seconds, timing is started after dropping is started, the test lasts for 20 minutes, the test smoke is generated 120 times in each test, the test oil is mixed oil of 300 g of refined first-grade rapeseed oil and 100 g of lard, and the test water is prepared by respectively adding 5g of salt, 5g of monosodium glutamate, 10 g of sugar, 10 g of soy sauce and 10 g of cooking wine into 100 g of water and uniformly stirring.
Further, the impeller weight gain was 7.1g after 5 trials in step ②, so that the acceleration factor of step ③ was rounded to 7.1/5/0.137 to 10.36, and the data corresponding to each maintenance year calculated in step ④ was as follows:
after 5 times of formula oil way tests, the weight gain value of the impeller is 7.1g after 2 years;
4.7g of impeller weight gain value after 5 times of formula oil way tests for 3 years;
after 5 times of formula oil way tests, the weight gain value of the impeller is 3.5g after 4 years;
the weight gain of the impeller after 5 times of formula oil tests is 2.8g in 5 years.
Compared with the prior art, the invention has the advantages that: the maintenance period of the impeller of the range hood is obtained by on-site investigation and data acquisition and combined with laboratory oil circuit accelerated test analysis, and the method has the advantages of simple and effective operation, short time and high consistency.
Detailed Description
The present invention will be described in further detail with reference to examples.
1. By visiting users, typical data (the typical data is that the users use two meals, 4-5 dishes and basically all use every day) are selected, the weight of the impeller of the range hood is 200g after the users use the range hood for 2 years, and 200g is used as a cleaning critical point according to the opinions of designers, cleaning service personnel and the like.
2. Selecting a high-acceleration test method: and (4) accelerating the test of the formula oil way. The main scheme of the test is that oil is added into a pot, and then an automatic liquid dropping device is used for spraying water into the pot reaching a certain temperature, so that oil smoke is generated. The thermocouple of the automatic dropping device is placed in a pot, the temperature is set to be 280 ℃, the dropping frequency is 2 seconds and 8 seconds, the timing is started after the dropping is started, the test lasts for 20 minutes, and the test is equivalent to 120 times of smoking in each test. Test materials: the oil in the pan is 300 g of refined first-grade rapeseed oil and 100 g of lard oil respectively; the water of the dropping device is added with 5g of salt, 5g of monosodium glutamate, 10 g of sugar, 10 g of soy sauce and 10 g of cooking wine in every 100 g of water and is stirred uniformly.
3. And calculating the acceleration multiple. The weight of the impeller is 7.1g after 5 times of tests, and the weight of the impeller is 1.42 g after each formula oil circuit acceleration test is calculated. In addition, the impeller level of an actual user home is 200g of the weight gain in 2 years of use, so that the weight gain of the impeller after each use of the user is 200/(2 x 365 x 2) ═ 0.137 g. Therefore, the acceleration multiple of the formula oil way test is 1.42/0.137-10.36.
4. And calculating data corresponding to each maintenance year.
The maintenance period of the to-be-tested range hood impeller is determined by comparing the weight gain value of the impeller with the table after 5 times of formula oil circuit tests, for example, if the measured data is greater than 7.1g, maintenance is considered within 2 years, if the measured data is greater than 4.7g and less than or equal to 7.1g, the maintenance period can be 2 years, if the measured data is greater than 3.5g and less than or equal to 4.7g, the maintenance period can be 3 years, if the measured data is greater than 2.8g and less than or equal to 3.5g, the maintenance period can be performed within 4 years, and if the measured data is less than or equal to 2.8g, the maintenance period can.
Tests prove that the test method has the characteristics of high acceleration, short test time, high test consistency and the like.
Claims (6)
1. A method for judging and testing maintenance period of an impeller of a range hood is characterized by comprising the following steps
①, determining a cleaning critical value, visiting a user, collecting data, selecting typical data as an analysis object, testing the weight increasing condition of the impeller, finally determining the cleaning critical value of the impeller and calculating the weight increasing value of the impeller after the user uses the range hood every time in different periods;
② formula oil circuit accelerated test, adding test oil and test water into a test pan to generate oil smoke, and recording test times and weight increase condition of impeller;
③, calculating acceleration times, and calculating the weight gain value of the impeller after each formula oil path acceleration test according to the test times and the weight gain condition of the impeller;
④ calculating the data corresponding to each maintenance time limit, calculating the impeller weight gain value of each time limit according to the acceleration multiple and the weight gain value of the impeller after the range hood is used each time in different time limits, and then judging the maintenance time limit of the impeller of a certain machine type to be tested according to the impeller weight gain value of each time limit.
2. The method for judging and testing the maintenance period of the impeller of the range hood according to claim 1, wherein the data collected in the step ① comprises oil type, use frequency of the range hood, use time, number of dishes made, and meat and vegetables matching.
3. The method for determining and testing the maintenance period of the impeller of the range hood according to claim 1, wherein the cleaning threshold of the impeller in the step ① is 200g, and the cleaning threshold is reached within 2 years.
4. The method for determining and testing the maintenance period of the impeller of the range hood according to claim 3, wherein in the step ①, dishes are cooked twice a day for each household,
if the maintenance period is 2 years, the weight gain value of the impeller of the range hood after each use is rounded to 200/2/365/2-0.137 g;
if the maintenance period is 3 years, the weight gain value of the impeller of the range hood after each use is rounded to 200/3/365/2-0.091 g;
if the maintenance period is 4 years, the weight gain value of the impeller of the range hood after each use is rounded to 200/4/365/2-0.068 g;
if the maintenance period is 5 years, the weight gain value of the impeller of the range hood after each use is rounded to 200/5/365/2-0.055 g.
5. The method for determining and testing the maintenance period of the range hood impeller according to claim 4, wherein the formula oil path acceleration test condition in the step ② is that test oil is added into a test pot, then an automatic dropping device is used for spraying test water into the pot which reaches a certain temperature to enable the test water to generate oil smoke, the heating temperature of the test pot is set to be 280 ℃, the dropping frequency is 2 seconds and 8 seconds, timing is started after dropping is started, the test lasts for 20 minutes, and the fuming test is performed 120 times each time, the test oil is mixed oil of 300 g of refined first-grade rapeseed oil and 100 g of lard oil, and the test water is prepared by respectively adding 5g of salt, 5g of monosodium glutamate, 10 g of sugar, 10 g of soy sauce and 10 g of cooking wine into 100 g of water and uniformly stirring.
6. The method for determining and testing the maintenance period of the range hood impeller according to claim 5, wherein the weight of the impeller is increased by 7.1g after 5 times of tests in the step ②, so that the acceleration multiple of the step ③ is rounded to 7.1/5/0.137 to 10.36, and the data corresponding to each maintenance year calculated in the step ④ are obtained as follows:
after 5 times of formula oil way tests, the weight gain value of the impeller is 7.1g after 2 years;
4.7g of impeller weight gain value after 5 times of formula oil way tests for 3 years;
after 5 times of formula oil way tests, the weight gain value of the impeller is 3.5g after 4 years;
after 5 times of formula oil way tests, the weight gain value of the impeller is 2.8g in 5 years;
the foregoing values are based on:
7.1 g-single impeller weight gain value-times of acceleration 0.137-10.36-5 ≈ 7.1 g;
4.7 g-single impeller weight gain value-times of acceleration-times-0.091-10.36-5-4.7 g;
3.5 g-single impeller weight gain value-times of acceleration-times-0.068-10.36-5-3.5 g;
2.8 g-single impeller weight gain-times-0.055-10.36-5-2.8 g.
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| CN2722078Y (en) * | 2004-08-20 | 2005-08-31 | 谭泽林 | Cooker hood by air flow energy |
| CN203101017U (en) * | 2013-02-28 | 2013-07-31 | 谢卓祥 | Range hood smoke discharging performance laboratory structure with reciprocating movable air plate |
| CN203231384U (en) * | 2013-05-22 | 2013-10-09 | 丽水市科拓厨电技术研究中心 | Range hood realizing convenience in switching-on and switching-off and maintenance |
| JP6557458B2 (en) * | 2014-08-12 | 2019-08-07 | 株式会社ハーマン | Range food |
| CN105465860B (en) * | 2015-12-25 | 2018-10-02 | 宁波方太厨具有限公司 | A kind of range hood actual flow measuring device and its measurement method |
| CN206223462U (en) * | 2016-10-18 | 2017-06-06 | 宁波方太厨具有限公司 | The cleannes detection means and the lampblack absorber with the detection means of a kind of lampblack absorber |
| CN107122531B (en) * | 2017-04-13 | 2020-06-09 | 电子科技大学 | High-speed impeller life evaluation method based on accelerated life test |
| CN107166469A (en) * | 2017-07-24 | 2017-09-15 | 佛山市正略信息科技有限公司 | A kind of smoke exhaust ventilator oil groove high-efficiency washing device |
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