CN109341021A - A kind of air-conditioning built-in system and method carrying out humid control using the degree of superheat - Google Patents
A kind of air-conditioning built-in system and method carrying out humid control using the degree of superheat Download PDFInfo
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- CN109341021A CN109341021A CN201811133094.4A CN201811133094A CN109341021A CN 109341021 A CN109341021 A CN 109341021A CN 201811133094 A CN201811133094 A CN 201811133094A CN 109341021 A CN109341021 A CN 109341021A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air-conditioning built-in systems and method that humid control is carried out using the degree of superheat, the system includes drive circuit unit, humidity temperature pickup unit, AD conversion unit, humidity processing unit, Operations Analysis, temperature is obtained by humidity temperature pickup unit, humidity simulation signal, by sending humidity processing unit to after AD conversion cell translation and Operations Analysis is handled, obtain the current return-air degree of superheat, through the preceding return-air degree of superheat compared with target superheat degree, current indoor ambient humidity is compared with target humidity, determine whether the aperture of adjustment electric expansion valve.Present invention employs a kind of methods of the control humidity of degree of superheat, the aperture of electric expansion valve is controlled by the technology of exact control of humidity to control cold medium flux, air-conditioning more energy saving is set to meet people for the regulatory demand of indoor environment humidity, and humid control precision is improved, and improves the comfort using air-conditioning.
Description
Technical field
The present invention relates to air conditioner controlling technologies, in particular to using the degree of superheat carry out humid control air-conditioning built-in system and
Method.
Background technique
Air-conditioning has become a part of people's life, really improves people as refrigeration or heating equipment
The comfort of life.In order to preferably improve the comfort level of user, air-conditioning needs to detect humidity, by this variable of humidity come
Realize the function of air-conditioning.Currently, air-conditioning controls the humidity of room type air-conditioning by the method for dehumidifying.The side of current dehumidifying
Method mainly achievees the purpose that dehumidifying by control evaporating temperature.But for a whole set of air-conditioning refrigeration system, the steaming
The height for sending out temperature is related with the uninterrupted of wind speed and refrigerant, and the control of humidity is carried out only by temperature, controls
Precision it is not high, and easily cause the waste of the energy, energy-efficient purpose be not achieved.
Summary of the invention
In order to solve to carry out the control of humidity only by temperature, the precision of control is not high, and easily causes the energy
Waste, is not achieved the technical problem of energy conservation, and the present invention is controlled the aperture of electric expansion valve by the technology of exact control of humidity, reached
More energy-efficient purpose.The embodiment of the present invention is exactly to solve the technology of energy conservation and comfort using a kind of new technical solution
Problem.
In order to solve the above technical problems, an embodiment of the present invention adopts the following technical solutions:
A kind of air-conditioning built-in system being carried out humid control using the degree of superheat, including drive circuit unit, temperature humidity are passed
Sensor cell, AD conversion unit, humidity processing unit, Operations Analysis:
The drive circuit unit provides the energy to the other component of system；
The humidity temperature pickup unit include be arranged in the air intake duct of compressor front for obtaining current pressure
Temperature sensor, the indoor coil pipe sensor of contracting machine suction temperature, each sensor is connect with AD conversion unit respectively will be warm
The analog signal of degree or humidity passes to AD conversion unit；
AD conversion unit is connect with humidity processing unit signal, after AD conversion unit converts analog signals into digital signal
It is sent to humidity processing unit；
The humidity processing unit is connect with Operations Analysis signal, and the data of AD conversion unit are passed to operation control
Unit processed carries out operation, and obtains and pass to stepper motor driving electric expansion valve increase after operation result converts signal or subtract
Small guide vane；
The Operations Analysis calculates the current return-air degree of superheat according to the testing result of humidity temperature pickup unit；Institute
It states and target superheat degree, target humidity is set in Operations Analysis, the current return-air degree of superheat is compared with target superheat degree,
Current indoor ambient humidity is compared with target humidity again, is then determined whether to adjust electric expansion valve according to comparison result
Aperture, calculate current return-air degree of superheat deviation and the current return-air degree of superheat change of error amount determination increase or reduce electronic expansion
The aperture of valve, and operation result is passed into humidity processing unit.
The air-conditioning built-in system that humid control is carried out using the degree of superheat, humidity temperature pickup unit further include
Humidity sensor in air-conditioning indoor temperature transmitter and air conditioning chamber, it is described when shroud temperature threshold value is according at least to current indoor environment
What temperature, current indoor ambient humidity and the current compressor suction temperature determined, when shroud temperature threshold value and current return-air mistake
Temperature corresponds, and in a tabular form or the form of array is stored in EEPROM, is called by Operations Analysis.
The air-conditioning built-in system that humid control is carried out using the degree of superheat, electric expansion valve and stepper motor are connected
It connects, stepper motor is controlled forward or reverse by the driving method of three-phase six-beat or four phase eight beat, to regulate and control electric expansion valve
Aperture.
The described air-conditioning built-in system that humid control is carried out using the degree of superheat, humidity sensor, air-conditioning in air conditioning chamber
The collective effect of the aperture regulation of indoor temperature transmitter and electric expansion valve realizes that coil temperature is lower than dew-point temperature, with not
It is disconnected to reduce humidity.
The air-conditioning built-in system using degree of superheat progress humid control further includes connecting with Operations Analysis
Display unit is at least used for displays temperature, humidity.
The described air-conditioning built-in system for carrying out humid control using the degree of superheat further include an atmospheric density calculating with
Correction module calculates local height above sea level and local atmospheric density, passes through a coefficient through the module after air-conditioning factory
K corrects air-conditioning rated cooling capacity and heating capacity, and 0.5 < K < 1 drives the fortune of air-conditioning then according to rated power after adjustment
Turn.
Using above-mentioned air-conditioning built-in system control humidity method the following steps are included:
In refrigeration, obtains current indoor coil temperature, current compressor suction temperature and work as shroud temperature threshold value, and carry out
Compare, if the current indoor coil temperature works as shroud temperature threshold value less than or equal to described, calculates the current compressor and return
The difference of temperature degree and the current indoor coil temperature obtains the current return-air degree of superheat；If the current indoor coil temperature is big
Work as shroud temperature threshold value in described, then calculates the current compressor suction temperature and described when the difference of shroud temperature threshold value is worked as
The preceding return-air degree of superheat；
According to the humidity of the current return-air degree of superheat regulation air-conditioning.
In the method using air-conditioning built-in system control humidity, air-conditioning is regulated and controled according to the current return-air degree of superheat
Humidity specifically includes the following steps:
Judge whether the current return-air degree of superheat is greater than target superheat degree, if it is not, then keeping the aperture of electric expansion valve not
Become；If it is, obtaining out current indoor ambient humidity, and it is compared with target humidity, it is big in current indoor ambient humidity
When target humidity, increases the aperture of electric expansion valve to increase the flow of refrigerant, be equal to mesh in current indoor ambient humidity
When marking humidity, keep the aperture of electric expansion valve constant；When current indoor ambient humidity is less than target humidity, it is swollen to reduce electronics
The aperture of swollen valve.
In the method using air-conditioning built-in system control humidity, needs to increase the aperture of electric expansion valve or subtract
When the aperture of small electric expansion valve, the difference for calculating the current return-air degree of superheat and target superheat degree obtains current return-air overheat
Deviation is spent, the difference for then calculating the return-air degree of superheat deviation of current return-air degree of superheat deviation and previous moment obtains current return-air
Degree of superheat change of error amount；Then electronics is adjusted according to current return-air degree of superheat deviation and current return-air degree of superheat change of error amount
The aperture of expansion valve.
Compared with prior art, beneficial effects of the present invention first is that: present invention employs a kind of control of degree of superheat is wet
The method of degree controls the aperture of electric expansion valve by the technology of exact control of humidity to control cold medium flux, enables air-conditioning more
Energy conservation the meets people and the regulatory demand of indoor environment humidity, and humid control precision is improved, and improves use
The comfort of air-conditioning.
Detailed description of the invention
Fig. 1 is the air-conditioning built-in system primary structure figure that humid control is carried out using the degree of superheat.
Fig. 2 is the control flow chart that air-conditioning humidity is controlled using the degree of superheat.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Coil temperature sensor, the compressor of indoor unit are utilized using the air-conditioning built-in system that the degree of superheat carries out humid control
And its temperature sensor collective effect at mouth, temperature data is obtained, and utilize the room of the suction temperature value of compressor and air-conditioning
Difference, that is, degree of superheat of the coil temperature of interior machine controls the humidity of air-conditioning.Further, in the method for degree of superheat control humidity
In, while the degree of superheat is controlled or is reconciled the aperture of electric expansion valve as a feedback.Electric expansion valve can be using step
It is driven into motor, stepping electricity is controlled such as the driving method of three-phase six-beat or four phase eight beat by certain pulse signal
Motivation forward or reverse, to complete the control to its aperture, and then controls the flow of refrigerant.Using compressor inlet and
The degree of superheat of evaporator outlet (when refrigeration) is fed back as one, and further the aperture of adjustment fine tuning electric expansion valve, reaches more
It is adjusted for the humid control accurately controlled and accurate cold medium flux.
In order to meet the requirement of precision and accuracy, air-conditioning of the invention needs to be provided with Operations Analysis, for transporting
It calculates and controls；It is provided with humidity processing unit, AD conversion unit, for detecting signal；Humidity temperature pickup unit, including it is wet
Spend sensor and temperature sensor；Wherein, humidity sensor, for obtaining humidity value, temperature sensor, for obtaining temperature letter
Number, such as one temperature sensor can be set in the front of the air intake duct of compressor, for detecting compressor air suction temperature.It is evaporating
High-precision temperature sensor is arranged in the middle part of device, and the difference with the suction temperature of compressor, the i.e. degree of superheat are accurate using this
The degree of superheat controls the aperture of electric expansion valve, to reach the temperature of energy conservation and operation of air conditioner comfort.
In conjunction with attached drawing specifically, as shown in Figure 1, including driving using the air-conditioning built-in system that the degree of superheat carries out humid control
Dynamic circuit unit, humidity temperature pickup unit, AD conversion unit, humidity processing unit and Operations Analysis, wherein driving
Circuit unit provides the energy to the other component of system, and humidity temperature pickup unit includes the air intake duct that compressor is arranged in
Temperature sensor, the indoor coil pipe sensor for being used to obtain current compressor suction temperature of front, further include air conditioning chamber
Humidity sensor in interior temperature sensor and air conditioning chamber, each sensor are connect respectively by the mould of temperature or humidity with AD conversion unit
Quasi- signal passes to AD conversion unit；According to current indoor environment temperature, current indoor ambient humidity and the current compressor
Suction temperature can be determined when shroud temperature threshold value, when shroud temperature threshold value and current return-air degree of superheat one-to-one correspondence, and with table shape
The form of formula or array is stored in EEPROM, is called by Operations Analysis.AD conversion unit and humidity processing unit are believed
Number connection, AD conversion unit is sent to humidity processing unit after converting analog signals into digital signal；Humidity processing unit with
The data of AD conversion unit are passed to Operations Analysis and carry out operation, and obtain operation by the connection of Operations Analysis signal
As a result stepper motor driving electric expansion valve is passed to after signal being converted increases or reduces aperture.Operations Analysis is according to temperature
The testing result for spending humidity sensor unit calculates the current return-air degree of superheat；Target superheat degree, mesh are set in Operations Analysis
Mark humidity, the current return-air degree of superheat be compared with target superheat degree, then by current indoor ambient humidity and target humidity into
Row compare, then according to comparison result determine whether adjust electric expansion valve aperture, calculate current return-air degree of superheat deviation and
Current return-air degree of superheat change of error amount determines the aperture for increasing or reducing electric expansion valve, and operation result is passed to humidity
Processing unit.Electric expansion valve is connect with stepper motor, controls stepping electricity by the driving method of three-phase six-beat or four phase eight beat
Machine forward or reverse, to regulate and control the aperture of electric expansion valve.Humidity sensor in air conditioning chamber, air-conditioning indoor temperature transmitter and
The collective effect of the aperture regulation of electric expansion valve realizes that coil temperature is lower than dew-point temperature, constantly to reduce humidity.Such as Fig. 1
Shown, the air-conditioning built-in system that humid control is carried out using the degree of superheat further includes the display list connecting with Operations Analysis
Member, the display unit are displayed for temperature, humidity and other related datas.Preferably, further include in the air-conditioning system
The calculating and correction module of one atmospheric density calculate local height above sea level and locality through the module after air-conditioning factory
Atmospheric density corrects air-conditioning rated cooling capacity and heating capacity, 0.5 < K < 1, then according to volume after adjustment by a COEFFICIENT K
Determine power, drives the operating of air-conditioning.
The method flow for carrying out humid control using above system is as shown in Figure 2.After power-on of air conditioner starting, start to freeze,
Detection evaporator temperature simultaneously calculates the degree of superheat, it may be assumed that obtains current indoor coil temperature, current compressor suction temperature and works as shroud
Warm threshold value, and being compared, if the current indoor coil temperature be less than or equal to it is described work as shroud temperature threshold value, calculate described in
The difference of current compressor suction temperature and the current indoor coil temperature obtains the current return-air degree of superheat；If described work as cup
Inner coil pipe temperature works as shroud temperature threshold value described in being greater than, then calculates the current compressor suction temperature and described when shroud temperature threshold value
Difference obtain the current return-air degree of superheat；Then judge whether the current return-air degree of superheat is greater than target superheat degree, if it is not, then protecting
The aperture for holding electric expansion valve is constant；If it is, obtaining out current indoor ambient humidity, and it is compared with target humidity,
When current indoor ambient humidity is greater than target humidity, increases the aperture of electric expansion valve to increase the flow of refrigerant, working as
When preceding indoor environment humidity is equal to target humidity, keep the aperture of electric expansion valve constant；It is less than in current indoor ambient humidity
When target humidity, reduce the aperture of electric expansion valve.It needs to increase the aperture of electric expansion valve or reduces electric expansion valve
When aperture, the difference for calculating the current return-air degree of superheat and target superheat degree obtains current return-air degree of superheat deviation, then counts
The difference for calculating the return-air degree of superheat deviation of current return-air degree of superheat deviation and previous moment obtains current return-air degree of superheat deviation and becomes
Change amount；Then opening for electric expansion valve is adjusted according to current return-air degree of superheat deviation and current return-air degree of superheat change of error amount
Degree.After electronic expansion valve opening adjusting, air-conditioning is continued to run 3 minutes or so, calculates the degree of superheat again, repeats above-mentioned adjustment electricity
The step of sub- expansion valve opening.The return-air degree of superheat deviation of previous moment is when calculating relative to current return-air degree of superheat deviation
The return-air degree of superheat deviation at adjacent previous moment.
The technology of adjusting electronic expansion threshold switch of the invention can carry out common regulation room inner ring with compressor rotary speed matching
Border humidity.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, however, it is to be understood that ability
Field technique personnel can be designed that a lot of other modification and implementations, these modifications and implementations will fall in the application public affairs
Within the scope and spirit opened.It more specifically, can be to the group of theme combination layout in range disclosed in the present application
A variety of variations and modifications are carried out at component and/or layout.In addition to variations and improvements to the component parts and or layout,
To those skilled in the art, other purposes also will be apparent.
Claims (9)
1. a kind of air-conditioning built-in system for carrying out humid control using the degree of superheat, it is characterised in that including drive circuit unit, temperature
Degree humidity sensor unit, AD conversion unit, humidity processing unit, Operations Analysis:
The drive circuit unit provides the energy to the other component of system；
The humidity temperature pickup unit include be arranged in the air intake duct of compressor front for obtaining current compressor
Temperature sensor, the indoor coil pipe sensor of suction temperature, each sensor connect with AD conversion unit respectively by temperature or
The analog signal of humidity passes to AD conversion unit；
The AD conversion unit is connect with humidity processing unit signal, after AD conversion unit converts analog signals into digital signal
It is sent to humidity processing unit；
The humidity processing unit is connect with Operations Analysis signal, and the data of AD conversion unit are passed to operation control list
Member carry out operation, and obtain passed to after operation result converts signal stepper motor driving electric expansion valve increase or reduce out
Degree；
The Operations Analysis calculates the current return-air degree of superheat according to the testing result of humidity temperature pickup unit；The fortune
It calculates and target superheat degree, target humidity is set in control unit, and the current return-air degree of superheat is compared with target superheat degree, then
Current indoor ambient humidity is compared with target humidity, is then determined whether to adjust electric expansion valve according to comparison result
Aperture, calculates current return-air degree of superheat deviation and the determination of current return-air degree of superheat change of error amount increases or reduces electric expansion valve
Aperture, and operation result is passed into humidity processing unit.
2. the air-conditioning built-in system according to claim 1 for carrying out humid control using the degree of superheat, it is characterised in that described
Humidity temperature pickup unit further includes humidity sensor in air-conditioning indoor temperature transmitter and air conditioning chamber, described to work as shroud temperature threshold
Value is determined according at least to current indoor environment temperature, current indoor ambient humidity and the current compressor suction temperature；
When shroud temperature threshold value and the current return-air degree of superheat correspond, and in a tabular form or the form of array is stored in EEPROM
In, it is called by Operations Analysis.
3. the air-conditioning built-in system according to claim 1 for carrying out humid control using the degree of superheat, it is characterised in that described
Electric expansion valve is connect with stepper motor, is rotated forward by the driving method of three-phase six-beat or four phase eight beat control stepper motor or anti-
Turn, to regulate and control the aperture of electric expansion valve.
4. the air-conditioning built-in system according to claim 2 for carrying out humid control using the degree of superheat, it is characterised in that described
The collective effect of the aperture regulation of humidity sensor, air-conditioning indoor temperature transmitter and electric expansion valve in air conditioning chamber realizes disk
Tube temperature degree is lower than dew-point temperature, constantly to reduce humidity.
5. the air-conditioning built-in system according to claim 1 for carrying out humid control using the degree of superheat, it is characterised in that also wrap
The display unit connecting with Operations Analysis is included, displays temperature, humidity are at least used for.
6. the air-conditioning built-in system according to claim 1 for carrying out humid control using the degree of superheat, it is characterised in that also wrap
The calculating and correction module for including an atmospheric density calculate local height above sea level and work as through the module after air-conditioning factory
Ground atmospheric density, corrects air-conditioning rated cooling capacity and heating capacity by a COEFFICIENT K, 0.5 < K < 1, then according to adjustment after
Rated power drives the operating of air-conditioning.
7. utilizing the method for the air-conditioning built-in system control humidity as claimed in any one of claims 1 to 6, it is characterised in that including
Following steps:
In refrigeration, obtains current indoor coil temperature, current compressor suction temperature and work as shroud temperature threshold value, and compared
Compared with, if the current indoor coil temperature be less than or equal to it is described work as shroud temperature threshold value, calculate the current compressor return-air
Temperature and the difference of the current indoor coil temperature obtain the current return-air degree of superheat；If the current indoor coil temperature is greater than
It is described to work as shroud temperature threshold value, then calculate the current compressor suction temperature and described when the difference of shroud temperature threshold value obtains currently
The return-air degree of superheat；
According to the humidity of the current return-air degree of superheat regulation air-conditioning.
8. the method according to claim 7 using air-conditioning built-in system control humidity, it is characterised in that worked as according to described
The humidity of preceding return-air degree of superheat regulation air-conditioning specifically includes the following steps:
Judge whether the current return-air degree of superheat is greater than target superheat degree, if it is not, then keeping the aperture of electric expansion valve constant；Such as
Fruit is then to obtain out current indoor ambient humidity, and be compared with target humidity, is greater than target in current indoor ambient humidity
When humidity, increases the aperture of electric expansion valve to increase the flow of refrigerant, be equal to target humidity in current indoor ambient humidity
When, keep the aperture of electric expansion valve constant；When current indoor ambient humidity is less than target humidity, reduce electric expansion valve
Aperture.
9. the method according to claim 8 using air-conditioning built-in system control humidity, it is characterised in that need to increase electricity
The aperture of sub- expansion valve or when reducing the aperture of electric expansion valve calculates the current return-air degree of superheat and target superheat degree
Difference obtains current return-air degree of superheat deviation, and the return-air degree of superheat for then calculating current return-air degree of superheat deviation and previous moment is inclined
The difference of difference obtains current return-air degree of superheat change of error amount；Then it is overheated according to current return-air degree of superheat deviation and current return-air
Spend the aperture of change of error amount adjustment electric expansion valve.
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| CN201811133094.4A CN109341021A (en) | 2018-09-27 | 2018-09-27 | A kind of air-conditioning built-in system and method carrying out humid control using the degree of superheat |
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| CN111426030A (en) * | 2020-02-25 | 2020-07-17 | 青岛海尔空调电子有限公司 | Control method of fixed-frequency air conditioner in heating state |
| CN112282892A (en) * | 2020-09-30 | 2021-01-29 | 潍柴动力股份有限公司 | Control method, device and system for positive ventilation of crankcase |
| CN114738961A (en) * | 2022-04-29 | 2022-07-12 | 美的集团武汉暖通设备有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
| CN114738961B (en) * | 2022-04-29 | 2024-02-20 | 美的集团武汉暖通设备有限公司 | Air conditioner, control method thereof and computer readable storage medium |
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