CN211451229U - High-precision constant-temperature constant-humidity laboratory energy-saving control device - Google Patents
High-precision constant-temperature constant-humidity laboratory energy-saving control device Download PDFInfo
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- CN211451229U CN211451229U CN201922145939.8U CN201922145939U CN211451229U CN 211451229 U CN211451229 U CN 211451229U CN 201922145939 U CN201922145939 U CN 201922145939U CN 211451229 U CN211451229 U CN 211451229U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The utility model relates to a laboratory energy-saving control device technical field, specifically speaking relates to a constant humidity laboratory energy-saving control device of high accuracy constant temperature, have mixing box and play bellows including the laboratory and through the connecting tube intercommunication, install table cold box, heating cabinet, humidification case and forced draught blower from a left side to the right side in proper order between mixing box and the air-out case, seted up the air intake on the lateral wall of mixing box. The utility model discloses a become dew point temperature control method, under the condition that needs cooling or dehumidification, the humidity value of system automatic detection air, equipment only need to handle the temperature to new dew point temperature can, this kind of control mode who becomes dew point temperature, can be according to the output ratio of real-time calculation's dew point temperature regulation compressor, as long as the dew point temperature that calculates at present is higher than most extreme air dew point temperature in recent years, then equipment just can not the full load operation, thereby the energy saving greatly, reduce the equipment energy consumption, also be favorable to the long-term stable operation of equipment simultaneously, the extension equipment life.
Description
Technical Field
The utility model relates to a laboratory energy-saving control device technical field, specifically speaking relates to a constant humidity laboratory energy-saving control device of high accuracy constant temperature.
Background
The constant temperature and humidity air conditioner is a technological air conditioner, mainly used for controlling the indoor temperature, humidity, cleanliness and air velocity in the scope of the technological requirement, in order to meet the requirement for indoor environment of special occasions such as industrial production, scientific research, etc., with the development of social economy, the science and technology and production requirement of every industry are more and more strict, especially require to keep invariable indoor temperature, humidity can meet the technological condition, therefore the demand of the constant temperature and humidity air conditioner of high accuracy increases day by day, the constant temperature and humidity air conditioner is applied to the place with strict control requirement for environment extensively, such as measurement test laboratory, data center, electric control center, UPS room, filing room, clean room, test and laboratory, production line of electronic component, etc.
The air conditioning system for simultaneously controlling temperature and humidity must have heating, humidifying, cooling and dehumidifying functions and a perfect automatic control system, and in order to ensure that the control precision is achieved and the temperature and humidity in a region are uniform, the requirements on air supply and ventilation times, air supply temperature difference and the control system are higher than those of a common centralized air conditioner, and the constant-temperature and constant-humidity system usually runs continuously and has higher energy consumption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a constant temperature and humidity laboratory energy-saving control device of high accuracy to solve the problem that proposes in the above-mentioned background art.
In order to achieve the purpose, the utility model provides a constant temperature and humidity laboratory energy-saving control device of high accuracy, have the mixing box and go out bellows including the laboratory with through the connecting tube intercommunication, the mixing box with it installs table cold box, heating cabinet, humidification case and forced draught blower in proper order from a left side to the right side between the bellows to go out, the air intake has been seted up on the lateral wall of mixing box, the table cold box is external to have the compressor.
Preferably, the heating box is internally provided with an electric heater, the electric heater is designed by adopting a plurality of groups of PTC thermistors, and a power supply of the electric heater can be connected to enable the electric heater to generate heat to raise the temperature in the heating box so as to heat the air passing through the heating box.
Preferably, an electric heater is installed in the humidification chamber, and a power supply of the electric heater is connected to humidify the air passing through the humidification chamber by the electric heater.
Preferably, a PID controller is installed on the outer wall of the laboratory and is externally connected with a driving module.
Preferably, the driving module realizes information interaction with the compressor, the electric heater and the electric heating humidifier through the wireless module.
Preferably, the driving module adopts a two-chip design of L298N and L297N.
Compared with the prior art, the beneficial effects of the utility model are that:
the high-precision constant-temperature constant-humidity laboratory energy-saving control device adopts a variable dew point temperature control method, under the condition of needing cooling or dehumidification, a system automatically detects the humidity value of air, equipment only needs to process the temperature to a new dew point temperature, the control mode of the variable dew point temperature can adjust the output ratio of a compressor according to the dew point temperature calculated in real time, and the equipment cannot run at full load as long as the currently calculated dew point temperature is higher than the most extreme air dew point temperature in recent years, so that the energy is greatly saved, the energy consumption of the equipment is reduced, meanwhile, the long-term stable operation of the equipment is facilitated, and the service life of the equipment is prolonged.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a working block diagram of the present invention;
FIG. 3 is one of the calculation flow charts of the present invention;
fig. 4 is a second calculation flow chart of the present invention;
fig. 5 is a third calculation flowchart of the present invention;
FIG. 6 is a flow chart of the temperature control according to the present invention;
FIG. 7 is a fourth flowchart of the calculation process of the present invention;
FIG. 8 is a fifth calculation flow chart of the present invention;
FIG. 9 is a sixth flowchart of the calculation process of the present invention;
FIG. 10 is a flow chart of humidity control according to the present invention;
fig. 11 is a PID control curve chart of the present invention.
The meaning of the individual reference symbols in the figures is:
1. a laboratory;
2. connecting a pipeline;
3. a mixing box; 30. an air inlet;
4. a surface cooling box; 40. a compressor;
5. a heating box;
6. a humidifying box;
7. a blower;
8. and (4) discharging from a wind box.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
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", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Example 1
The utility model provides a high accuracy constant temperature and humidity laboratory energy-saving control device, as shown in fig. 1-11, including laboratory 1 with through connecting tube 2 intercommunication have mixing box 3 and go out bellows 8, install table cold box 4, heating cabinet 5, humidification case 6 and forced draught blower 7 from a left side to the right side in proper order between mixing box 3 and the air-out case 8, seted up air intake 30 on the lateral wall of mixing box 3, table cold box 4 is external to have compressor 40.
In this embodiment, an electric heater is installed inside the heating box 5, and the electric heater is designed by using a plurality of groups of PTC thermistors, and can be connected to a power supply of the electric heater, so that the electric heater generates heat to raise the temperature inside the heating box 5, and the temperature of the air passing through the heating box 5 is raised.
Further, an electric heater is installed inside the humidification chamber 6, and a power supply of the electric heater is connected to humidify the air passing through the humidification chamber 6 by the electric heater.
In the actual process, install the PID controller on the laboratory 1 outer wall, the external drive module of PID controller for follow-up control compressor 40, electric heater, electric heat type humidifier power close or open, drive module realizes the information interaction through wireless module and compressor 40, electric heater, electric heat type humidifier, drive module adopts the design of L298N and the two chips of L297N for the power of drive compressor 40, electric heater, electric heat type humidifier, convenient follow-up temperature humidity control that carries on.
The present invention relates to the prior art of circuits and electronic components and modules, and can be implemented by those skilled in the art without redundancy, and the present invention also does not relate to improvements to the internal structure and method.
It is worth to be noted that according to the law of conservation of energy, energy is neither generated nor lost by air, but only transferred from one object to another object, so if the indoor temperature and humidity need to be changed, we must provide energy enough to change the temperature and humidity of the indoor air, and this energy is reflected on the temperature and humidity value of the air supply, which is called as "the indoor required air supply temperature/humidity", and this value can be calculated by the following formula.
TFeeding device＝TSetting up+(TSetting up-TIndoor use) (1)
HFeeding device＝HSetting up+(HSetting up-HIndoor use) (2)
In the formula, TFeeding deviceIndicating the temperature of the supply air, TSetting upIndicating the set temperature, TIndoor useWhich is indicative of the temperature in the room,
Hfeeding deviceIndicating the supply air humidity, HSetting upIndicates the set humidity, HIndoor useIndicating indoor humidity
In the specific implementation process, when the compressor 40 is controlled, when the real-time temperature of the mixed air subtracts the indoor required air supply temperature to obtain a negative number, the meter cooling section does not work, the compressor 40 is not started, when the real-time temperature of the mixed air subtracts the indoor required air supply temperature to obtain a positive number, the meter cooling section works, the compressor 40 is started, the input-output ratio of the compressor 40 is adjusted according to the temperature difference, when the mixed air needs to be cooled and dehumidified, the real-time temperature of the mixed air subtracts the dew point temperature to calculate the difference between the two, and the output ratio of the compressor is adjusted according to the temperature difference, because the dew point temperature can change along with the change of the air humidity, the time of the full-load operation of the compressor 40 is reduced for energy conservation.
When the temperature in the laboratory 1 is controlled, firstly, the indoor actual temperature can be detected by a temperature sensor, the indoor required air supply temperature value is calculated by the formula (1), at the moment, the temperature of the mixed air is detected, the difference between the temperature of the mixed air and the indoor required air supply temperature is calculated, the start-stop and output ratio of the electric appliances in the cold box 4 or the heating box 5 is controlled according to the temperature difference, if the difference between the temperature of the mixed air and the indoor required air supply temperature is a positive number, the temperature of the mixed air is higher than the indoor required air supply temperature, at the moment, the compressor 40 is started, the cold box 4 starts to cool the mixed air, and at the moment, the electric heater does not need to be started. The output ratio of the compressor 40 is adjusted according to the difference value between the mixed air temperature and the indoor required air supply temperature, no energy is wasted when the temperature is accurately controlled, if the difference value between the mixed air temperature and the indoor required air supply temperature is a negative number, the temperature of the mixed air is lower than the indoor required air supply temperature, the heating box 5 starts heating the mixed air at the moment, the compressor 40 does not need to be started at the moment, the power supply of the electric heater is switched on for heating, the thermistors can be started in groups, the number of groups of starting thermistors of the electric heater is adjusted according to the difference value between the mixed air temperature and the indoor required air supply temperature, and no energy is wasted when the temperature is accurately controlled.
The basis of PID control is proportional control, and there is steady state error system output when only proportional control, and integral control enlargeable error's amplitude eliminates steady state error, nevertheless probably increases the overshoot, and differential control can accelerate big inertia system response speed and weaken the overshoot trend, the utility model discloses a temperature control adopts PID control mode, specifically as follows:
first, temperature P (proportional) control-coarse adjustment
Proportional control is one of the simplest control methods. The output of the controller is proportional to the input error signal, and the output of the system has steady-state error when only proportional control is carried out.
Then, the temperature I (integral) control-the amplitude of the amplified error eliminates the steady state error
In integral control, the output of a controller is in a direct proportion relation with the integral of an input error signal, for an automatic control system, if a steady-state error exists after the system enters a steady state, the control system is called as a system with the steady-state error or a system with a difference for short, in order to eliminate the steady-state error, an integral term is required to be introduced into the controller, the integral term integrates the error depending on time, and the integral term is increased along with the increase of time even if the error is small, so that the integral term is increased along with the increase of time, the output of the controller is pushed to be increased to further reduce the steady-state error until the steady-state error is equal to zero, and therefore, the proportional Plus Integral (PI) controller can enable the system to have no steady-state error after the system enters the steady state.
Finally, temperature D (differential) control-the tendency of the prediction error to vary avoids severe overshoot of the controlled quantity
In the differential control, the output of the controller is in direct proportion to the differential of the input error signal (namely, the change rate of the error), the automatic control system can oscillate or even destabilize in the adjustment process for overcoming the error, because of the existence of a large inertia component (link) or a lag component (delay) and has the function of restraining the error, the change always lags behind the change of the error, the solution is to lead the change of the function of restraining the error, namely, when the error is close to zero, the function of restraining the error is supposed to be zero, namely, the function of introducing a proportional term into the controller is often insufficient, the function of the proportional term is only to amplify the amplitude of the error, and the required addition of the derivative term can predict the trend of the error change, so that the controller with the proportion + integral + derivative can lead the control function of restraining the error to be equal to zero, even negative values, thereby avoiding severe overshoot of the controlled quantity.
When controlling the temperature in the laboratory 1, firstly, the actual indoor humidity is detected by the humidity sensor, the indoor required air supply humidity value is calculated by the formula (2), at this time, the humidity of the mixed air is detected, the difference between the humidity of the mixed air and the indoor required air supply humidity is calculated, the start-stop and output ratio of the electric appliances in the cooling box 4 or the heating box 5 is controlled according to the humidity difference, if the difference between the humidity of the mixed air and the indoor required air supply humidity is a negative number, the humidity of the mixed air is lower than the indoor required air supply humidity, at this time, the humidifying box 6 starts to humidify the mixed air, and at this time, the compressor 40 does not need to be started. The electric heating humidifier carries out humidification processing to wind, according to the difference size of mixed air humidity and the indoor air supply humidity that needs, adjust the humidification volume of electric heating humidifier, do not waste energy of any concern when reaching humidity accurate control, if the difference of mixed air humidity and the indoor air supply humidity that needs is positive number, then explain that the humidity of mixed air is higher than the indoor air supply humidity that needs, open compressor 40 this moment, table cold box 4 begins to do cooling dehumidification processing to the mixed air, need not to start the inside electrical apparatus of humidification case 6 this moment. According to the difference size of the mixed air humidity and the indoor required air supply humidity, the output ratio of the compressor 40 is adjusted, no energy is wasted when the humidity is accurately controlled, in the process of cooling and dehumidifying, the temperature is changed, the mixed air temperature is directly reduced to the dew point temperature, at the moment, in order to ensure the air supply temperature, a heating section is required to be started to heat the air, the temperature is compensated and returned due to dehumidification, after the temperature is increased, the relative humidity of the air is reduced to some extent, the relative humidity is reduced by heating, and then the humidifier is used for secondary humidification adjustment to meet the requirement of the air supply humidity.
The utility model discloses a become dew point temperature control method, under the condition that needs cooling or dehumidification, the humidity value of system automatic detection air, equipment only need to handle the temperature to new dew point temperature can, this kind of control mode who becomes dew point temperature, can be according to the output ratio of real-time calculation's dew point temperature regulation compressor, as long as the dew point temperature that calculates at present is higher than most extreme air dew point temperature in recent years, then equipment just can not the full load operation, thereby the energy saving greatly, reduce the equipment energy consumption, also be favorable to the long-term stable operation of equipment simultaneously, the extension equipment life.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a constant temperature and humidity laboratory energy-saving control device of high accuracy, includes laboratory (1) and has mixing box (3) and play bellows (8) through connecting tube (2) intercommunication, its characterized in that: a surface cooling box (4), a heating box (5), a humidifying box (6) and a blower (7) are sequentially arranged between the mixing box (3) and the air outlet box (8) from left to right, an air inlet (30) is formed in the side wall of the mixing box (3), and a compressor (40) is externally connected to the surface cooling box (4); the outer wall of the laboratory (1) is provided with a PID controller which is externally connected with a driving module; the driving module realizes information interaction with a compressor (40), an electric heater and an electric heating humidifier through a wireless module, and the driving module adopts a double-chip design of L298N and L297N.
2. The high-precision constant-temperature and constant-humidity laboratory energy-saving control device according to claim 1, characterized in that: an electric heater is arranged in the heating box (5), and the electric heater is designed by adopting a plurality of groups of PTC thermistors.
3. The high-precision constant-temperature and constant-humidity laboratory energy-saving control device according to claim 1, characterized in that: an electric heating humidifier is arranged in the humidifying box (6).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303766A (en) * | 2020-11-09 | 2021-02-02 | 广东立佳实业有限公司 | Humidity control assembly under each temperature range |
| CN114110977A (en) * | 2021-11-15 | 2022-03-01 | 珠海格力电器股份有限公司 | Control method of air conditioner and air conditioner |
| CN115248607A (en) * | 2021-12-22 | 2022-10-28 | 山东建筑大学 | High-ventilation-rate humidity generation control system |
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2019
- 2019-12-04 CN CN201922145939.8U patent/CN211451229U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303766A (en) * | 2020-11-09 | 2021-02-02 | 广东立佳实业有限公司 | Humidity control assembly under each temperature range |
| CN114110977A (en) * | 2021-11-15 | 2022-03-01 | 珠海格力电器股份有限公司 | Control method of air conditioner and air conditioner |
| CN114110977B (en) * | 2021-11-15 | 2022-12-20 | 珠海格力电器股份有限公司 | Control method of air conditioner and air conditioner |
| CN115248607A (en) * | 2021-12-22 | 2022-10-28 | 山东建筑大学 | High-ventilation-rate humidity generation control system |
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