Balance temperature regulation BTC

1.

The constant temperature and humidity testing machine can simulate the test conditions of different environments such as high temperature, high temperature, low humidity, low temperature and so on. The equipment is suitable for testing the heat resistance, humidity resistance, dry resistance and cold resistance of materials and procts, so as to ensure the performance of procts under aging resistance and special environmental conditions. And the working principle of the equipment is also very important, the following is its working principle

The working principle of the constant temperature and humidity testing machine is that the refrigeration cycle of the machine adopts the reverse Karo cycle, which is composed of two isothermal processes and two adiabatic processes. Its refrigeration system is composed of the French original TECAN hermetic compressor, and adopts the balance temperature control (BTC). When the refrigeration system works continuously, the control system will control the output of the heater according to the set temperature point through the PID automatic calculation output results, and finally achieve a dynamic balance

e to the wide application field of constant temperature and humidity testing machine, its position in the environmental testing instry is also extraordinary, so-called endless learning. In order to make the equipment bigger and stronger, we need to be familiar with the working principle of the equipment, and the above is also what we must master

reference model:

lrhs-101-lh

lrhs-225-lh

lrhs-504-lh

lrhs-800-lh

lrhs-1000-lh

2. In the case of daylight lighting, lighting is often used as auxiliary rib light. If a low color temperature lamp (3200K) is used, the color temperature of daylight (5600k) should be adjusted. The commonly used method is to use the lighting paper to increase the color temperature or directly use the high color temperature lamp. Sometimes, two kinds of color temperature lamps are specially used to illuminate the same scene separately without balance, so as to achieve the lighting effect of alternating cold and warm. The color temperature coordination relationship among light source, color film and camera. Sunlight film can only be taken at 5600k color temperature; The light film can only be shot at 3200K color temperature. The camera is shot in sunlight with 5600k color filter, and shot in 3200K light with 3200K color filter

this requires the use of a color thermometer. Generally, from 10:00 noon to 2:00 pm, the standard sunlight is about 5200 ~ 5500k in a clear and cloudless sky without direct sunlight. The color temperature of news photo lamp is 3200K; The color temperature of general tungsten lamp, tungsten lamp used in photo studio to take black-and-white photos and general ordinary bulb light is about 2800k; Because the color temperature is low, so in this case, the photo will feel yellow after being enlarged. The color temperature of ordinary fluorescent lamp is about 7200 ~ 8500K, so the photo taken under the fluorescent lamp will be cyan. This is because the color temperature of the shooting environment is not the same as that set by the shooting machine. Generally, it can be adjusted on the enlarger. However, if there are fluorescent lamps and tungsten filament lamps on the shooting site, we will become a mixed light source, which is difficult to adjust
to sum up, it is very important to consider, set and adjust the color temperature ring shooting. Whether you're using a traditional camera or a digital camera or a video camera. Must pay attention to color temperature!

3. Electronic high and low temperature impact box circulation system environmental test adopts air conditioning mode: forced ventilation internal balance temperature regulation (BTC). This method means that when the refrigeration system works continuously, the control system controls the output of the heater according to the set temperature point through PID automatic calculation output results, and finally achieves a dynamic balance
1. Air circulation device: built in air conditioning room, circulating air ct and long axis centrifugal fan, use efficient refrigerator and energy regulation system, exchange effectively through efficient fan to achieve the purpose of temperature change. By improving the air flow, the air flow and the heat exchange capacity with the heater and air surface cooler are improved, so the temperature uniformity of the test chamber is greatly improved
2. Heating method: high quality nickel chromium alloy wire electric heater
3. Air cooling mode: multistage diaphragm air heat exchanger

4. (1) (2) the secretion of thyroid hormone is increased, and the secretion of thyroid hormone is controlled by hypothalamus and pituitary gland, so the secretion of thyrotropin releasing hormone from hypothalamus and thyrotropin from pituitary gland are increased; When the content of thyroid hormone is too much, it can inhibit the function of hypothalamus and pituitary through feedback regulation.
(3) the regulation of hypothalamus to thyroid is graded regulation, It is also hormone regulation.
therefore, the answer is:
(1) thyroid stimulating hormone releasing hormone thyroid stimulating hormone (TRH)
(2) feedback regulation inhibition
(3) hormone

5. You can only use drugs to maintain body temperature, but you can't use them often.

7. The principle of temperature and humidity balance of air conditioning is basically based on air conditioning refrigeration. Then use the water on the evaporator to spray it in the room directly by atomization
in other words, the water in the evaporator of the air conditioner is directly evaporated by the humidifier. In fact, a humidifier is installed in the air conditioner. It's very simple and there's no difficult technology
many people buy household appliances to enrich their home furnishings, and they don't have a clear purchasing direction, such as buying TV sets, washing machines and air conditioners. When they arrive at the shopping mall, they just buy them according to the recommendation of the sales promoter, but they don't have a clear purchasing direction, so they are likely to choose graally with the recommendation of the sales promoter, This choice of home appliances is likely to arrive at home after not suitable for their own, and the use of time will not be satisfactory
then, Xiao Bian, who has been engaged in the maintenance of household appliances for many years, puts forward some suggestions on the choice of air conditioning
choose according to family members
if there are not many family members, that is, a family of three or four, and they usually work or go to school ring the day, they will only use the air conditioner at home in the evening, and the air conditioner is turned on within two hours, so the requirement for comfort is not particularly high, As long as it can cool and heat
in this case, it is recommended to choose the fixed frequency air conditioner, because if the fixed frequency air conditioner is turned on within two hours, it can save electricity compared with the frequency conversion air conditioner. The operating frequency of the fixed frequency air conditioner is fixed, and the frequency of the frequency conversion air conditioner is variable
in addition, if it only runs for two hours, the peak value of the variable frequency air conditioner is the highest within two hours. That is to say, if the set temperature difference is too large within two hours, the variable frequency air conditioner is very power consuming, and the power consumption rate of the variable frequency air conditioner is 1.2 to 1.6 times that of the constant frequency air conditioner. Only when the indoor temperature is close to the set temperature, the frequency conversion air conditioner will rece the frequency, and when the air conditioner reces the frequency, it is the time to save electricity compared with the constant frequency air conditioner. However, our air conditioner time has come, and the temperature has reached, so we are not used to turning on the air conditioner at night
if there are many family members, such as the elderly and children just born, and the air conditioner is turned on for more than six hours a day, it is recommended to choose the frequency conversion air conditioner, which is also DC frequency conversion
because the frequency of the variable frequency air conditioner will drop to several Hertz when it is close to the set temperature, compared with the constant frequency air conditioner, the variable frequency air conditioner can save electricity, and the variable frequency air conditioner has high comfort, fast cooling and heating, soft blowing and low noise, which is very suitable for families with children and high temperature requirements
choose according to the comfort and convenience
regardless of the cost of power consumption, the running time of a day is relatively long, about more than eight hours. For high comfort requirements, it is recommended to choose intelligent frequency conversion air conditioning, and DC frequency conversion, the more high-end the better
at present, the intelligent DC variable frequency air conditioner is the most high-end air conditioner in the household air conditioner. It can control the air conditioner and other household appliances in the home through the intelligent central system in the home, which greatly facilitates our use
for example, we are learning, and the air conditioner is not turned on, the indoor temperature is very high, just say a word, then the air conditioner will operate according to your command standard. For another example, we are about to leave work in the company, and the air conditioner in our home is not turned on. If we want to enter the home, we can feel the comfortable temperature of the air conditioner. We only need to turn on the air conditioner remotely in the app of the mobile phone, and let the air conditioner operate according to the setting mode entered by ourselves
however, if there is a problem with the intelligent variable frequency air conditioner, it is very troublesome to maintain it, because the structure of the intelligent variable frequency air conditioner is very precise, involving complex circuits and software, so the probability of its failure is relatively high
about how to choose the air conditioner, it is probably the above points. For these suggestions, I believe that when you buy the air conditioner, you will have a clear direction for the air conditioner you want to buy. Instead of following the direction recommended by the promoters, you should buy according to the direction you need
if you have any different suggestions, you are welcome to discuss them in the comments area. Let's learn and make progress together.

8. In my opinion, r-92 is used directly; G\ B color temperature to adjust the white balance is a bit reluctant, if each manufacturer uses different chips, the package will be different, even if the same manufacturer's lamp, the wavelength can not be only one, if the wavelength is different, you can adjust the same color temperature, there will be some deviation

9. It doesn't have much effect. What air conditioning wants is the effect of refrigeration and heating. Everything else is trivial. There is a big difference in the price of adding a function.

10. There is a solution to the problem of adjusting the temperature of chocolate, which is very easy to operate, and then we follow his and tortoise