CN112066457B - Control method for tail end of efficient intelligent warm and humid air conditioner - Google Patents

Control method for tail end of efficient intelligent warm and humid air conditioner Download PDF

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Publication number
CN112066457B
CN112066457B CN202010982300.XA CN202010982300A CN112066457B CN 112066457 B CN112066457 B CN 112066457B CN 202010982300 A CN202010982300 A CN 202010982300A CN 112066457 B CN112066457 B CN 112066457B
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psi
air
fan
temperature
heat source
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CN112066457A (en
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陈伟桥
岑英杰
黄远睦
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Zhongke Guangdong Environmental Technology Co ltd
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Zhongke Guangdong Environmental Technology Co ltd
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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a control method of a high-efficiency intelligent warm and humid air conditioner tail end, which belongs to the field of refrigeration air conditioners. Along the flow direction of air in the main part, the evaporimeter is located surface cooler low reaches, and the condenser is located evaporimeter low reaches, and the fan is located condenser low reaches, installs the blender between evaporimeter and the condenser. The ratio of the windward area of the evaporator to the windward area of the condenser is not more than 1:2, the air conditioner can not only supply cold and heat for a use area, but also can dehumidify the air treated by the surface air cooler, and can be independently used as a dehumidifier, so that the air conditioner has the advantages of good dehumidification effect, high working efficiency and high intelligent degree.

Description

Control method for tail end of efficient intelligent warm and humid air conditioner
Technical Field
The invention relates to the field of refrigeration air conditioners, in particular to a control method for a tail end of a high-efficiency intelligent warm and humid air conditioner.
Background
An air conditioner, i.e., an air conditioner, can adjust parameters such as temperature, humidity, cleanliness, air flow rate and the like of air in a room (a closed room or an area) to meet the requirements of human comfort or a technological process. With the development of social productivity and the progress of science and technology, air conditioners have moved around the society and play an indispensable role in the production and life of people.
In some seasons, such as the "south return" season between spring and summer and the "yellow plum" season in Yangtze river basin in southern areas, the air humidity is particularly high, for areas with constant temperature and humidity requirements, especially for large-scale constant temperature and humidity shady and cool storehouses, the temperature is usually required to be below 20 ℃, and the relative humidity is between 35% and 75%, usually, the temperature and humidity are controlled by adopting chilled water through the tail end of a surface air cooler air conditioner, and in this case, the air is usually required to be dehumidified, and at present, two methods are usually used for dehumidifying the air: one is to start the air conditioner for dehumidification, but because the relative humidity of the outlet air of the air conditioner is very high, the weather of 'returning to south' does not have enough load to raise the temperature, so under the condition of starting the air conditioner, the electric heating is needed to be started again, and the relative humidity is lowered by using the method of raising the temperature by the electric heating. The other method is that a dehumidifier is installed in an air conditioner use area, under the condition, because the air volume of the dehumidifier is usually not large, under the condition that the use area is large, the humidity of all areas can not meet the requirement, and under the condition, the dehumidifier needs to be manually controlled to start and stop according to the temperature and the humidity, which is very inconvenient. Therefore, a new type of air conditioner is required to be designed to solve the above problems.
A multi-functional air conditioner dehumidification unit (CN103629755A20140312) of area condensation heat recovery has disclosed a can carry out dehumidification thermoregulation's multi-purpose air conditioner to the air, including compressor, surface cooler, water-cooled condenser, evaporimeter, condensation heat recovery ware etc. this air conditioner both can give the cooling and heating of use area, can carry out reheating treatment to the air after the cooling dehumidification again, and the power consumption is few. However, the air conditioner is additionally provided with a water-cooled condenser, and the air conditioner can be normally used only by supplying external cooling water, in addition, the invention does not specially design an evaporator and the condenser, and under the condition that the air passing amount of the evaporator and the air passing amount of the condenser are the same, the dehumidification efficiency and the compressor efficiency are poor, the temperature is difficult to reach below 20 ℃, and the relative humidity is between 35% and 75%. In addition, the air conditioner is not provided with an intelligent control system, and the operation can not be intelligently controlled according to the temperature and humidity conditions of a use area.
Disclosure of Invention
The invention aims to provide a control method of an efficient intelligent warm and humid air conditioner tail end, the air conditioner tail end controlled by the method not only can supply cold and heat for a use area, but also can perform reheating treatment on cooled and dehumidified air, and the method has the advantages of good dehumidification effect, high working efficiency and high intelligent degree.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a control method of a high-efficiency intelligent warm and humid air conditioner terminal is realized by adopting an air conditioner terminal, the air conditioner terminal comprises a main body, a surface air cooler, a compressor module, an evaporator, a condenser and a fan are installed in the main body, the compressor module, the evaporator and the condenser are communicated through a refrigeration pipeline, the surface air cooler is connected with an external cold and heat source, and a pipeline for connecting the surface air cooler with the external cold and heat source is provided with a proportion adjusting valve; the main body is provided with an air inlet and an air supply outlet, the surface cooler is arranged close to the air inlet, the fan is arranged in the main body close to the air supply outlet along the flowing direction of air, the evaporator is positioned at the downstream of the surface cooler, the condenser is positioned at the downstream of the evaporator, the fan is positioned at the downstream of the condenser, and a mixer is arranged between the evaporator and the condenser; the ratio of the windward area of the evaporator to the windward area of the condenser is not more than 1: 2; the main body is provided with a controller, a temperature and humidity sensor is arranged in the main body, and the compressor module, the fan and the temperature and humidity sensor are electrically connected with the controller;
the temperature and humidity sensor is used for sensing the temperature and humidity of the environment and feeding detected environment temperature and humidity data back to the controller, the controller controls the operation of the compressor module, the fan and the proportion regulating valve, and the controller is electrically connected with an external cold and heat source central control system;
the control method comprises the following steps:
setting a set temperature T1, a set humidity ψ 1, a threshold value e of the opening degree e of the proportional regulating valve1And the above-mentionedThe minimum air quantity q of the fan;
② judging whether the environmental temperature T is greater than T1(ii) a When T is less than or equal to T1Judging whether the relative humidity psi of the environment is greater than the set humidity psi1When psi > psi1When the system is used, the fan and the compressor module are started to dehumidify the environment, and after the environment is dehumidified for a period of time, whether psi is larger than psi is judged again1(ii) a When psi is less than or equal to psi1Judging whether T is greater than T1If T is less than or equal to T1The fan and the compressor module are suspended and enter a standby state if T is more than T1Starting the fan and the proportional regulating valve; if after a period of dehumidification psi > psi still exists1The system alarms;
thirdly, according to the step II, when T is more than T1When the cooling device is used, the fan and the proportion regulating valve are started, and the fan pumps out cold air cooled by the surface air cooler to cool the environment; when the proportional regulating valve opening reaches a threshold value Ee1When the air volume of the fan is maximum and the water temperature of the external cold and heat source is minimum, T is measured to be more than T1The controller sends out an alarm signal; when T is less than or equal to T1Judging whether psi is greater than psi1；
Fourthly, according to the step III, when T is less than or equal to T1Judging whether psi is greater than psi1(ii) a If psi is less than or equal to psi1The compressor module and the fan are suspended and enter a standby state;
fifthly, according to the step III, when T is less than or equal to T1Judging whether psi is greater than psi1(ii) a When psi > psi1Temporal, judge whether Ε > Ε1(ii) a If E > E1Firstly, judging whether the temperature of the external cold and heat source water is the lowest; if the temperature of the external cold and heat source is not at the lowest temperature, the temperature of the cold and heat source is reduced, and whether psi is greater than psi is judged again after a period of time1(ii) a If the water temperature of the external cold and heat source reaches the lowest temperature, starting the compressor module to dehumidify; after dehumidifying for a period of time, when psi is less than or equal to psi1Then, whether T is larger than T is judged1If T is>T1The system gives an alarm if T is less than or equal to T1The compressor module and the fan are suspended and enter a standby state; if notThe water temperature of the boundary cold and heat source is the lowest, and psi is still greater than psi after the compressor module is started to dehumidify for a period of time1The system alarms;
sixth, according to step five, if E ≦ E1The air quantity of the fan is reduced to improve the dehumidification quantity of the surface air cooler; if psi > psi is still detected1Judging whether the air volume of the fan is minimum or not, and if so, entering the step of judging whether the temperature of the external cold and heat source is minimum or not in the step (v); if the air volume of the fan is less than the minimum air volume q, reducing the air volume of the fan, and judging whether T is greater than T or not after a period of time1If T is less than or equal to T1Then go back to step iv to determine if psi is greater than psi1Step (d) if T > T1Entering the step of judging whether the temperature of the external cold and heat source water is the lowest or not in the step of fifthly;
wherein: t is1-set temperature of the use environment; t-measured actual temperature of the environment; psi1-set humidity of the use environment; psi — the actual relative humidity of the environment measured; e-the actual opening of the proportional regulating valve; e1-a threshold value of the opening of said proportional regulating valve set; q is the minimum air quantity of the fan; the lowest water temperature of the external cold and heat source is the lowest temperature of cooling water which can be provided by the cold and heat source.
In a preferred technical scheme of the invention, the mixer comprises a shell and a plurality of air deflectors, wherein two ends of the shell are provided with openings, the air deflectors are uniformly arranged in the shell, and an air guide area is formed between every two adjacent air deflectors.
In a preferred technical scheme of the invention, the air deflector is arranged in a wave shape along the length direction of the air deflector.
In a preferred technical solution of the present invention, the compressor module includes a compressor, an expansion valve, and a filter, and the compressor, the expansion valve, and the filter are all communicated with the refrigeration pipeline.
In a preferred technical scheme of the invention, an opening is formed in one side wall of the main body, a mask is arranged at the opening, and the mask is fixed on the main body through screws.
In a preferred technical scheme of the invention, an RS485 communication interface is arranged on the controller.
In a preferred technical scheme of the invention, in the third step, the air volume of the fan is regulated and controlled, and when the air volume of the fan reaches the maximum air volume, the opening degree of the proportional control valve and the water temperature of an external cold and heat source are regulated.
The invention has the beneficial effects that:
the invention provides a control method of a high-efficiency intelligent warm and humid air conditioner tail end, and the air conditioner tail end controlled by the method has the following advantages:
(1) a normal mode: in winter and summer, the air conditioner can realize cooling and heating of a use area by opening the fan and the surface cooler which is externally connected with a cold and heat source. A dehumidification mode: in a special season with low air temperature and high air humidity, such as the 'return south sky' in southern areas and the 'plum rain season' in Yangtze river watershed, the air temperature inside and outside the room is not high, the heat load is low, but the humidity load is high, at the moment, the compressor module, the evaporator and the condenser can be started by closing the surface air cooler, the air with high low temperature humidity is cooled and dehumidified by the evaporator, the low-temperature air cooled and dehumidified by the evaporator is returned to the temperature by the condenser, the low-temperature air is sent to a use area by the fan after the temperature of the low-temperature air is raised, and the air environment of the use area is improved.
(2) The ratio of the windward area of the evaporator to the windward area of the condenser is not more than 1:2, guarantee the cooling dehumidification effect of evaporimeter, the windward side area of condenser should be as big as possible, can guarantee that the condenser can fully carry out the rewarming to the low temperature air after the cooling dehumidification, work efficiency is high.
(3) Install temperature and humidity sensor in the main part, whether the controller starts the dehumidification mode according to the data selection that temperature and humidity sensor measured, need not artificial control, and intelligent degree is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a front view of a high efficiency intelligent warm and humid air conditioner terminal provided by the present invention;
FIG. 2 is a side view of an efficient intelligent warm and humid air conditioning terminal provided by the present invention;
FIG. 3 is a top view of a mixer provided by the present invention;
fig. 4 is a flowchart of a control method of the efficient intelligent warm and humid air conditioner terminal provided by the invention.
Reference numerals:
1. a main body; 2. a compressor module; 3. an evaporator; 4. a mixer; 5. a condenser; 6. a fan; 7. a surface cooler; 8. a controller; 9. a face mask; 11. an air inlet; 12. an air supply outlet; 21. a compressor; 22. a filter; 23. an expansion valve; 31. a temperature and humidity sensor; 41. a housing; 42. an air deflector; 43. a wind guiding area; 71. a proportional regulating valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be interconnected through one or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-4, a control method for an efficient intelligent warm and humid air conditioner terminal is implemented by using an air conditioner terminal, the air conditioner terminal includes a main body 1, a surface air cooler 7, a compressor module 2, an evaporator 3, a condenser 5 and a fan 6 are installed in the main body 1, the compressor module 2, the evaporator 3 and the condenser 5 are communicated through a refrigeration pipeline, and the surface air cooler 7 is connected to an external cold and heat source. Further, a proportional control valve 71 is installed on a pipeline connecting the surface cooler 7 with an external cold and heat source. The proportional control valve 71 can adjust the amount of the cooling water flowing into the surface cooler 7 as needed to control the cooling capacity 7 and the dehumidification capacity of the surface cooler. Further, the compressor module 2 includes a compressor 21, an expansion valve 23, and a filter 22, and the compressor 21, the filter 22, and the expansion valve 23 are all communicated with the refrigeration pipeline. The compressor 21, the expansion valve 23, the filter 22, the evaporator 3, and the condenser 5 constitute a closed refrigeration cycle. An air inlet 11 and an air supply outlet 12 are formed in the main body 1, the surface air cooler 7 is arranged close to the air inlet 11, the fan 6 is arranged close to the air supply outlet 12, the evaporator 3 is positioned at the downstream of the surface air cooler 7, the condenser 5 is positioned at the downstream of the evaporator 3, the fan 6 is positioned at the downstream of the condenser 5, and a mixer 4 is arranged between the evaporator 3 and the condenser 5 along the flowing direction of air in the main body 1; the ratio of the windward area of the evaporator 3 to the windward area of the condenser 5 is not more than 1: 2; install controller 8 on the main part 1, install temperature and humidity sensor 31 in the main part 1, compressor 21 fan 6 and temperature and humidity sensor 31 all with 8 electric couplings of controller. More specifically, an RS485 communication interface is arranged on the controller 8, and the controller 8 can receive an external instruction and send real-time data to an external central control system; the controller can control the start and stop of the fan 6 and the wind speed, can adjust the opening of the proportional control valve 71, and can control the compressor module 2 and related auxiliary electrical components; the working process of the air conditioner is as follows: under the ordinary mode, only need start fan 6 with surface cooler 7, surface cooler 7 is through external cold and hot source, 6 air of fan is followed air intake 11 department inhales, and the air process surface cooler 7 realizes going up and down the temperature, and the air after going up and down the temperature is followed fan 6 is followed air supply outlet 12 department sends out, improves the air circumstance of use area. In the dehumidification mode, the surface air cooler 7 is closed or opened, the flow rate of the cooling liquid in the surface air cooler 7 is controlled through the proportion regulating valve 71, the compressor 21 is started, and the dehumidification refrigeration cycle is started. The low temperature air that humidity is big passes through behind the preliminary cooling dehumidification of surface cooler 7 evaporimeter 3 the evaporimeter 3 department is further cooled down the dehumidification, in order to guarantee the dehumidification effect of the air of evaporimeter 3, the windward area of evaporimeter 3 with the ratio of the windward area of condenser 5 should not be greater than 1: 2. the air after the evaporator 3 dehumidifies flows through the mixer 4, and the mixer 4 enables the air with uneven temperature and humidity due to too small air passing amount to be uniformly mixed. The air from the mixer 4 flows to the condenser 5, is fully cooled at the condenser 5, and is sent out from the air supply outlet 12 by the fan 6, so that the air quality of a use area is improved. The number of the fans 6 may be plural, and a plurality of the air supply ports 12 may be provided.
The temperature and humidity sensor 31 is used for sensing the temperature and humidity of the environment and feeding detected environment temperature and humidity data back to the controller 8, the controller 8 controls the operation of the compressor module 2, the fan 6 and the proportional control valve 71, and the controller 8 is electrically connected with an external cold and heat source central control system;
the control method comprises the following steps:
setting a set temperature T of a use environment1Set humidity psi1And a threshold value e of the opening e of the proportional regulating valve 711And a minimum air quantity q of the fan 6;
② judging whether the environmental temperature T is greater than T1(ii) a When T is less than or equal to T1Judging whether the relative humidity psi of the environment is greater than the set humidity psi1When psi > psi1When the system is started, the fan 6 and the compressor module 2 are started to dehumidify the environment, and after the environment is dehumidified for a period of time, whether psi is larger than psi is judged again1(ii) a When psi is less than or equal to psi1Judging whether T is greater than T1If T is less than or equal to T1And psi is less than or equal to psi1When the air conditioner is in use, the fan 6 and the compressor module 2 are suspended and enter a standby state; if T > T1The blower 6 and the proportional regulating valve 71 are started. If after a period of dehumidification psi > psi still exists1And the system alarms. Here, it is also possible to set a lower limit value for the relative humidity of the air in the control system, and to shut down the compressor when the measured actual relative humidity ψ of the environment reaches the lower limit value, in order to ensure that the relative humidity of the use environment can meet the requirements.
Thirdly, according to the step II, when T is more than T1When the temperature of the environment is lowered, the fan 6 and the proportion regulating valve 71 are started, and the fan 6 pumps out cold air cooled by the surface air cooler 7 to cool the environment; when the proportional control valve 71 opening reaches the threshold value Ee1When the air quantity of the fan 6 is maximum and the water temperature of an external cold and heat source is minimum, T is measured to be more than T1The controller 8 sends out an alarm signal; when T is less than or equal to T1Judging whether psi is greater than psi1；
Fourthly, according to the step III, when T is less than or equal to T1Judging whether psi is greater than psi1(ii) a If psi is less than or equal to psi1The compressor module 2 and the fan 6 are suspended and enter a standby state;
fifthly, according to the step III, when T is less than or equal to T1Judging whether psi is greater than psi1(ii) a When psi > psi1Temporal, judge whether Ε > Ε1(ii) a If E > E1Judging whether the water temperature of the external cold and heat source is the lowest, if the water temperature of the external cold and heat source is not the lowest, the controller 8 issues a water temperature reduction instruction to a central control system of the external cold and heat source central control system, and judging whether psi is larger than psi or not again after a period of time1(ii) a If the water temperature of the external cold and heat source reaches the lowest temperature, starting the compressor module 2 for dehumidification; after dehumidifying for a period of time, judging whether T is greater than T1If T is>T1The system gives an alarm if psi is less than or equal to psi1And T is less than or equal to T1When the air conditioner is in use, the compressor module 2 and the fan 6 are suspended, and then the air conditioner enters a standby state; if E > E1When the water temperature of the external cold and heat source is the lowest and the compressor module 2 is started for dehumidification for a period of time, psi is still greater than psi1Or T>T1The controller 8 sends out an alarm signal;
sixth, according to step five, if E ≦ E1Reducing the air volume of the fan 6 to improve the dehumidification capacity of the surface air cooler 7; it is noted that while reducing the fan 6 air volume, to maintain room temperature intact, Ε is gradually increased if Ε > Ε1And the room temperature still exceeds the standard, so the air quantity of the fan 6 cannot be reduced continuously. After reducing the air quantity of the fan 6 and reducing the dehumidification quantity for a period of time, if psi is still detected to be larger than psi1Judging whether the air volume of the fan 6 is minimum or not, if so, entering the step of judging whether the temperature of the external cold and heat source is minimum or not in the step (v); if the air volume of the fan 6 is less than the minimum air volume q, reducing the air volume of the fan 6, and judging whether T is greater than T or not after a period of time1If T is less than or equal to T1Then go back to step iv to determine if psi is greater than psi1Step (d) if T > T1Entering the step of judging whether the temperature of the external cold and heat source water is the lowest or not in the step of fifthly;
wherein: t is1-set temperature of the use environment; t-measured actual temperature of the environment; psi1-set humidity of the use environment; psi — the actual relative humidity of the environment measured; e — the actual opening of the proportional regulating valve 71;Ε1-a threshold value for the opening of said proportioning valve 71 set; the lowest water temperature of the external cold and heat source is the lowest temperature of cooling water which can be provided by the cold and heat source.
Further, in the third step, the air volume of the fan 6 is regulated and controlled, and when the air volume of the fan 6 reaches the maximum air volume, the opening degree of the proportional control valve 71 and the water temperature of the external cold and heat source are regulated. When the air conditioner is used at the tail end in a use environment, when the temperature is too high, the fan 6 is firstly started, the surface cooler 7 is started, and the proportional control valve 71 is used for cooling, so that the requirement can be usually met in summer, for some climates, when the humidity is still overproof after the temperature is reached due to overlarge humidity load, the dehumidification can be firstly carried out by adopting small air volume and low water temperature, and if the humidity is still overproof, the compressor 21 is started for dehumidification. For climates with only humidity load, dehumidification may be performed by turning on only the compressor 21. And when the temperature is in the set value range, starting the fan 6, and controlling the compressor in a start-stop mode to adjust the relative humidity. And for the temperature and humidity within the range of the uniform set value, closing the tail end of the air conditioner.
According to the control method for the tail end of the efficient intelligent warm and humid air conditioner, the tail end of the air conditioner controlled by the method has the following advantages:
(1) a normal mode: in winter and summer, the air conditioner can realize cooling and heating of a use area by opening the fan 6 and the surface cooler 7 and connecting the surface cooler 7 with an external cold and heat source. Cooling and dehumidifying mode: when there is a heat load and the humidity load is very large, the dehumidification can be performed by adopting a small air volume and a low water temperature, and if the humidity exceeds the standard, the compressor module 2 can be started to perform deep dehumidification. A dehumidification mode: and in the special season that air temperature is low, air humidity is big, like "return south sky" in southern areas and "plum rain season" in the Yangtze river basin, indoor outer air temperature is not high this moment, and the heat load is little, but the moisture load is big, can pass through to close this moment surface cooler 7 starts compressor module 2 evaporimeter 3 and be condenser 5 utilize evaporimeter 3 cools down the dehumidification to the big air of low temperature humidity, the low temperature air after evaporimeter 3 cools down the dehumidification again through condenser 5 returns the temperature, behind the low temperature air temperature rise by fan 6 sends into the service area, improves the air circumstance of service area.
(2) The ratio of the windward area of the evaporator 3 to the windward area of the condenser 5 should not be greater than 1: 2: that is, the evaporator 3 should not be too big, should design its air passing volume according to the dew point temperature of its air-out to guarantee as far as possible the cooling dehumidification effect of evaporator 3, the windward side area of condenser 5 should be as big as possible, as the best implementation mode, the windward side area of condenser 5 should be equivalent to the area of supply-air outlet 12, simultaneously be equipped with the blender 4 between evaporator 3 and the condenser 5, can improve the inhomogeneous problem of air temperature humidity that the air passing volume of air overruning is too little caused the evaporator 3, dehumidification effect is good, can guarantee that condenser 5 can fully carry out the rewarming to the low temperature air after the cooling dehumidification, and work efficiency is high.
(3) Install in the main part 1 temperature and humidity sensor 31, controller 8 is according to whether the data selection that temperature and humidity sensor 31 surveyed starts the dehumidification mode, need not artificial control, and intelligent degree is high.
Further, referring to fig. 3, the mixer 4 includes a housing 41 and a plurality of air deflectors 42, the housing 41 is open at two ends, the air deflectors 42 are uniformly arranged in the housing 41, and an air guiding area 43 is formed between two adjacent air deflectors 42. Further, the air guiding plate 42 is disposed in a wave shape along the length direction thereof. The mixer 4 has the functions of disturbing air and promoting air mixing, and the air deflector 42 arranged in a wave shape is beneficial to disturbing air, so that the air flowing out of the evaporator 3 is mixed more uniformly, and the heat exchange effect of the condenser 5 can be improved.
Further, an opening is formed in one side wall of the main body 1, a mask 9 is arranged at the opening, and the mask 9 is fixed to the main body 1 through screws. The openings facilitate the installation of the respective devices in the body 1 by the operator, and the mask 9 protects the devices in the body 1.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (7)

1. A control method of a high-efficiency intelligent warm and humid air conditioner terminal is realized by adopting an air conditioner terminal, the air conditioner terminal comprises a main body (1), a surface air cooler (7), a compressor module (2), an evaporator (3), a condenser (5) and a fan (6) are installed in the main body (1), the compressor module (2), the evaporator (3) and the condenser (5) are communicated through a refrigeration pipeline, the surface air cooler (7) is connected with an external cold and heat source, and a proportion adjusting valve (71) is installed on a pipeline connecting the surface air cooler (7) with the external cold and heat source; it has air intake (11), supply-air outlet (12) to open on main part (1), surface cooler (7) are close to air intake (11) set up, fan (6) are close to supply-air outlet (12) set up, its characterized in that: in the flow direction of air in the main body (1), the evaporator (3) is positioned at the downstream of the surface air cooler (7), the condenser (5) is positioned at the downstream of the evaporator (3), the fan (6) is positioned at the downstream of the condenser (5), and a mixer (4) is arranged between the evaporator (3) and the condenser (5); the ratio of the windward area of the evaporator (3) to the windward area of the condenser (5) is not more than 1: 2; the main body (1) is provided with a controller (8), the main body (1) is internally provided with a temperature and humidity sensor (31), and the compressor module (2), the fan (6) and the temperature and humidity sensor (31) are electrically connected with the controller (8);
the temperature and humidity sensor (31) is used for sensing the temperature and humidity of the environment and feeding detected environment temperature and humidity data back to the controller (8), the controller (8) controls the operation of the compressor module (2), the fan (6) and the proportion regulating valve (71), and the controller (8) is electrically connected with an external cold and heat source central control system;
the control method comprises the following steps:
setting a set temperature T of a use environment1Set humidity psi1Threshold value Ε of the opening Ε of the proportional regulating valve (71)1And a minimum air quantity q of the fan (6);
② judging whether the environmental temperature T is greater than T1(ii) a When T is less than or equal to T1Judging whether the relative humidity psi of the environment is greater than the set humidity psi1When psi > psi1When the system is used, the fan (6) and the compressor module (2) are started to dehumidify the environment, and after the environment is dehumidified for a period of time, whether psi is larger than psi is judged again1(ii) a When psi is less than or equal to psi1Judging whether T is greater than T1If T is less than or equal to T1The fan (6) and the compressor module (2) are suspended and enter a standby state if T is more than T1The fan (6) and the proportional control valve (71) are started; if after a period of dehumidification psi > psi still exists1The system alarms;
thirdly, according to the step II, when T is more than T1When the air conditioner is started, the fan (6) and the proportion regulating valve (71) are started, and the fan (6) pumps out cold air cooled by the surface air cooler (7) to cool the environment; when the opening of the proportional regulating valve (71) reaches a threshold value Ee1When the air volume of the fan (6) is maximum and the water temperature of the external cold and heat source is lowest, T is measured to be more than T1The controller (8) sends out an alarm signal; when T is less than or equal to T1Judging whether psi is greater than psi1；
Fourthly, according to the step III, when T is less than or equal to T1Judging whether psi is greater than psi1(ii) a If psi is less than or equal to psi1The compressor module (2) and the fan (6) are suspended and enter a standby state;
fifthly, according to the step III, when T is less than or equal to T1Judging whether psi is greater than psi1(ii) a When psi > psi1Temporal, judge whether Ε > Ε1(ii) a If E > E1Firstly, judging whether the temperature of the external cold and heat source water is the lowest; if the temperature of the external cold and heat source is not at the lowest temperature, the temperature of the cold and heat source is reduced, and whether psi is greater than psi is judged again after a period of time1(ii) a If the water temperature of the external cold and heat source is alreadyWhen the lowest temperature is reached, the compressor module (2) is started to dehumidify; after dehumidifying for a period of time, when psi is less than or equal to psi1Then, whether T is larger than T is judged1If T is>T1The system gives an alarm if T is less than or equal to T1The compressor module (2) and the fan (6) are suspended and enter a standby state; if the water temperature of the external cold and heat source is the lowest and the compressor module (2) is started to dehumidify for a period of time, psi is still greater than psi1The system alarms;
sixth, according to step five, if E ≦ E1The air quantity of the fan (6) is reduced to improve the dehumidification quantity of the surface air cooler (7); if psi > psi is still detected1Judging whether the air volume of the fan (6) is minimum or not, if so, entering the step (V) of judging whether the temperature of the external cold and heat source is minimum or not; if the air volume of the fan (6) is less than the minimum air volume q, reducing the air volume of the fan (6), and judging whether T is greater than T or not after a period of time1If T is less than or equal to T1Then go back to step iv to determine if psi is greater than psi1Step (d) if T > T1Entering the step of judging whether the temperature of the external cold and heat source water is the lowest or not in the step of fifthly;
wherein: t is1-set temperature of the use environment; t-measured actual temperature of the environment; psi1-set humidity of the use environment; psi — the actual relative humidity of the environment measured; ae-the actual opening of the proportional regulating valve (71); e1-a threshold value of the opening of said proportional regulating valve (71) set; q is the minimum air quantity of the fan (6); the lowest water temperature of the external cold and heat source is the lowest temperature of cooling water which can be provided by the cold and heat source.
2. The control method of the efficient intelligent warm and humid air conditioner terminal according to claim 1, characterized in that:
the mixer (4) comprises a shell (41) and a plurality of air deflectors (42), two ends of the shell (41) are open, the air deflectors (42) are uniformly arranged in the shell (41), and an air guide area (43) is formed between every two adjacent air deflectors (42).
3. The control method of the efficient intelligent warm and humid air conditioner terminal according to claim 2, characterized in that:
the air deflector (42) is arranged in a wave shape along the length direction of the air deflector.
4. The control method of the efficient intelligent warm and humid air conditioner terminal according to claim 1, characterized in that:
the compressor module (2) comprises a compressor (21), an expansion valve (23) and a filter (22), wherein the compressor (21), the expansion valve (23) and the filter (22) are communicated with the refrigeration pipeline.
5. The control method of the efficient intelligent warm and humid air conditioner terminal according to claim 1, characterized in that:
an opening is formed in one side wall of the main body (1), a mask (9) is arranged at the opening, and the mask (9) is fixed to the main body (1) through screws.
6. The control method of the efficient intelligent warm and humid air conditioner terminal according to claim 1, characterized in that:
and an RS485 communication interface is arranged on the controller (8).
7. The control method of the efficient intelligent warm and humid air conditioner terminal according to claim 1, characterized in that:
in the third step, the air volume of the fan (6) is regulated and controlled firstly, and when the air volume of the fan (6) reaches the maximum air volume, the opening degree of the proportional control valve (71) and the water temperature of an external cold and heat source are regulated.
CN202010982300.XA 2020-09-17 2020-09-17 Control method for tail end of efficient intelligent warm and humid air conditioner Active CN112066457B (en)

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