CN113587220A - Control method of combined air-conditioning box - Google Patents
Control method of combined air-conditioning box Download PDFInfo
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- CN113587220A CN113587220A CN202110729339.5A CN202110729339A CN113587220A CN 113587220 A CN113587220 A CN 113587220A CN 202110729339 A CN202110729339 A CN 202110729339A CN 113587220 A CN113587220 A CN 113587220A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 61
- 230000007613 environmental effect Effects 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 abstract description 4
- 241000208125 Nicotiana Species 0.000 description 13
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 13
- 230000033228 biological regulation Effects 0.000 description 13
- 238000007791 dehumidification Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 235000019504 cigarettes Nutrition 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 235000019505 tobacco product Nutrition 0.000 description 1
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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
- F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
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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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method of a combined air-conditioning box, which comprises the following steps that the initial running state of the combined air-conditioning box is a normal state; the combined air-conditioning box opens a fresh air fan and a fresh air valve to continuously or intermittently convey fresh air to the air supply pipeline; the combined air conditioning box operates under the working condition of cooling and dehumidifying or the working condition of cooling and humidifying. Acquire indoor dry bulb temperature, dew point temperature, wet bulb temperature, moisture content, relative humidity, environmental information of one or more in the enthalpy value through sensor group to in feeding back environmental information to combined air conditioning case, so that combined air conditioning case can be accurate the indoor environmental conditions of judgement, adjust the humiture of amount of wind and air feed then, in order to keep indoor temperature, humidity value in the scope value of manual setting, realize the purpose through accurate adjustment reduction energy consumption.
Description
Technical Field
The invention relates to the field of air conditioning equipment, in particular to a control method of a combined air conditioning cabinet.
Background
It is known that in cigarette factories, especially in the workshop of tobacco shred making, tobacco shred storage and the like, a large amount of tobacco shreds exist, and a stable temperature and humidity environment is required for normal operation. The automatic control principle of the air conditioning system of the cigarette factory is different from that of a comfortable air conditioner used in a civil building, the air conditioning control system needs to be specially designed according to the process requirements of the production workshop of the cigarette factory on the temperature and the humidity of the environment, particularly the high-precision control requirement on the humidity is realized, and otherwise the quality of cut tobacco products is influenced.
The combined air conditioning box is used for realizing temperature and humidity control of workshops such as tobacco shred manufacturing, tobacco shred storage and the like in a common cigarette factory, and the requirements of cooling supply and dehumidification are realized through the surface cooling section of the air conditioning box, so that the same actuating mechanism needs to adjust two target values to cause unstable control, and the reheating condition exists to cause huge waste of energy. Therefore, on the premise of ensuring the production environment requirement of the cigarette factory, the operation control mode of the air conditioning system is optimized, and the method has important significance for the tobacco shred yield quality and the energy conservation and consumption reduction of the factory.
Specifically, the change range of indoor humidity load is large, the annual cold load of production workshops such as tobacco shred manufacturing, tobacco shred storage and the like in a cigarette factory basically changes along with the fluctuation of external climate, the relative influence of the cold load caused by indoor heat generation is small, and the temperature controllability is large; however, the fluctuation range of the indoor humidity load is large during production, the cut tobacco can absorb a large amount of moisture instantly during production, and particularly under the dry climate condition, the humidity requirement can be met only by a large amount of indoor humidification. Therefore, large changes in the wet load create a large challenge to the accuracy of the humidity control.
Indoor wet and cold load mismatch: when the air-conditioning box operates under the cooling and dehumidifying working condition, the air-conditioning box (without the functions of solid adsorption type dehumidification, liquid absorption type dehumidification, dry type dehumidification and the like) only achieves the purpose of dehumidification by adjusting the surface cooling valve, when the indoor dehumidification capacity is large, the surface cooling valve dehumidification can cause the air supply temperature to be supercooled and further cause the indoor supercooling, and at the same moment, the fan can only be kept at the same rotating speed, the room temperature can not be adjusted by adjusting the air speed, the heating valve needs to be opened to reheat the air supply to keep the room temperature, and the energy is wasted.
The air-conditioning box has large energy consumption in annual operation: in order to ensure that the temperature and humidity change fluctuation of production workshops such as tobacco shred manufacturing, tobacco shred storage and the like in a cigarette factory is maintained in a set interval, the designed air supply quantity of the air conditioning box is large, the indoor relative humidity is directly reduced through direct adjustment of the surface cooling valve or is directly increased through direct adjustment of the humidifying valve, and the supercooled air supply temperature or the indoor temperature is corrected and adjusted through the heating valve. In order to ensure that the temperature and humidity control is stable under all conditions, the fan of the air conditioning box is generally set to operate at a power frequency of 45Hz or above under the refrigeration working condition, and the condition that the meter cooling valve/humidifying valve and the heating valve are opened simultaneously exists in most of time, so that energy is wasted.
Disclosure of Invention
The invention aims to provide a control method of a combined air-conditioning box, which aims to solve the problem that the control mode of the existing combined air-conditioning box can cause energy waste.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: a control method of a combined air conditioning cabinet comprises the following steps:
the initial operation state of the combined air-conditioning box is a normal state;
the combined air-conditioning box opens a fresh air fan and a fresh air valve to continuously or intermittently convey fresh air to the air supply pipeline;
the sensor group of the combined air-conditioning box acquires one or more environmental information of indoor dry-bulb temperature, dew point temperature, wet-bulb temperature, moisture content, relative humidity and enthalpy value, and feeds the environmental information back to the combined air-conditioning box;
and the combined air conditioning box operates under a cooling and dehumidifying working condition or a cooling and humidifying working condition, and adjusts the air supply quantity and/or the temperature and the humidity of the air supply pipeline so as to keep the temperature and the humidity of the air supply pipeline conveyed to the room within a manually set range value.
Preferably, the cooling and dehumidifying operating condition is that:
when a humidifying valve and a heating valve in the air supply pipeline are in a closed state and the indoor dry bulb temperature is higher than a manually set temperature range value, the combined air-conditioning box is switched to a normal state to operate;
when the fan in the air supply pipeline is reduced to the rated minimum rotating speed for operation and the indoor dry bulb temperature is lower than the manually set temperature range value, the combined air-conditioning box is switched to operate in a low-load state;
and when the surface cooling valve in the air supply pipeline is adjusted to be in a fully opened state and the indoor dew point temperature is higher than a manually set temperature range value, the combined air-conditioning box is switched to be operated in a high-load state.
Preferably, when the combined air-conditioning box is operated in a normal state, the combined air-conditioning box adjusts the opening degree of a surface cooling valve and the rotating speed of a fan so as to maintain that the temperature of the dry bulb is higher than a manually set temperature range value;
when the combined air-conditioning box is in a low-load state, the humidifying valve of the air supply pipeline is closed, and the combined air-conditioning box adjusts the opening degree of the surface cooling valve and the opening degree of the heating valve so as to adjust the temperature of the dry balls to be higher than the manually set temperature range value;
closing the heating valve, and switching the operation of the air conditioning box from a low-load state to a normal state during the combination;
when the combined air conditioner box is in a high-load state, the combined air conditioner adjusts the opening of a surface cooling valve or a humidifying valve, and reduces and adjusts the rotating speed of the fan;
and when the rotating speed of the fan is reduced to the rated minimum rotating speed for operation and the indoor dry bulb temperature is lower than the manually set temperature range value, the air-conditioning box is switched from the high-load state operation to the low-load state operation for adjustment during combination.
Preferably, the cooling and humidifying working condition is operated as follows:
the combined air-conditioning box operates in a normal state,
when the humidifying load in the air supply pipeline is larger than the cold load, the combined air-conditioning box adjusts the surface cooling valve to be completely opened, and the dry bulb temperature is smaller than the manually set range value, so that the combined air-conditioning box increases and adjusts the opening degree of the humidifying valve;
when the humidifying load in the air supply pipeline is smaller than the cold load, the combined air-conditioning box adjusts the humidifying valve to be completely opened, and the moisture content is smaller than a manually set range value, so that the combined air-conditioning box increases and adjusts the opening degree of the surface cooling valve;
when the indoor dew point temperature and the indoor dry bulb temperature are maintained within manually set range values and the rotating speed of the fan is a rated minimum rotating speed value, the combined air-conditioning box operates in a low-load state;
and when the indoor dew point temperature and the indoor dry bulb temperature are maintained within the manually set range values and the rotating speed of the fan is the rated maximum rotating speed value, the combined air-conditioning box runs in a high-load state.
Preferably, the calculation formula of the dry bulb temperature is as follows:
T＝f2(D,RH)＝(B1÷(B2-LN(B3×(D÷1000×P÷1000÷(RH×(D÷1000+0.622))))))-B4
b1 ═ 3991.11 in the formula; b2 ═ 18.5916; b3 ═ 7.5; b4 ═ 233.84; t is the dry bulb temperature; RH is relative humidity; d is the moisture content; p is atmospheric pressure; LN is the enthalpy value;
preferably, the calculation formula of the moisture content is as follows:
D＝f1(T,RH)＝622×EXP(A1÷(T+273.15)+A2+A3×(T+273.15)+A4×(T+273.15)^2+A5×(T+273.15)^3+A6×(T+273.15)^4+A7×LN((T+273.15))×RH÷(P-EXP(A1÷(T+273.15)+A2+A3×(T+273.15)+A4×(T+273.15)^2+A5×(T+273.15)^3+A6×(T+273.15)^4+A7×LN((T+273.15))×RH)
in the formula, T is the dry bulb temperature; RH is relative humidity; d is the moisture content; p is atmospheric pressure (1 standard atmospheric pressure 101325 Pa); LN is the enthalpy value; a1 ═ -5.8002206 x 10^ 3; a2 ═ 1.3914993; a3 ═ -4.8640239X 10^ -2; a4 is 4.1764768 multiplied by 10^ -5; a5 ═ -1.4452093X 10^ -8; a6 ═ 0; a7 ═ 6.5459673.
Preferably, the environment temperature of the combined air-conditioning box is 0-200 ℃.
Preferably, the sensor group comprises a plurality of air parameter sensors and temperature and humidity sensors, and the plurality of air parameter sensors and the temperature and humidity sensors are used for detecting the environmental information of indoor, outdoor and air supply pipelines.
Preferably, the combined air-conditioning box is in wireless communication connection with an external terminal.
Preferably, the operation of the cooling and dehumidifying working condition and the operation of the cooling and humidifying working condition adopt analog quantity signals to control the operation.
Compared with the prior art, the invention has the following beneficial effects:
1. acquire indoor dry bulb temperature, dew point temperature, wet bulb temperature, moisture content, relative humidity, enthalpy value in one or more environmental information through sensor group to the indoor environmental aspect can be accurately judged out to the combined air conditioning case, then adjust the humiture of amount of wind and air feed, in order to keep indoor temperature, humidity value in the scope value of manual setting, realize the purpose through the accurate adjustment reduction energy consumption.
2. In order to improve the control precision of the combined air-conditioning box, the operation of the cooling and dehumidifying working condition and the cooling and humidifying working condition is controlled by analog quantity signals, so that the accurate and quick regulation and control can be carried out when the external environment influences and changes indoors, and the problem of energy waste caused by the use of the combined air-conditioning box is avoided.
3. The control method of the combined air conditioning box can aim at different indoor conditions to operate under the cooling and dehumidifying working conditions or the cooling and humidifying working conditions, and each working condition operation is further divided into normal state operation, low-load state operation and high-load state operation to deal with different indoor environments, and targeted regulation and control are performed to reduce the energy consumption of regulation and control.
Drawings
Fig. 1 is a partial schematic view illustrating a control method of a combined type air conditioning box according to an embodiment.
Reference numerals:
10. an air supply duct;
101. a surface cooling valve; 102. a heating valve; 103. a humidifying valve; 104. a blower;
105. a fresh air valve; 106. a return air valve;
20. temperature and humidity sensor.
Detailed Description
The invention proposes a new solution, which is described in detail below with reference to the accompanying drawings for a clearer representation.
Referring to fig. 1, the present embodiment provides a method for controlling a combined air conditioning cabinet, including the following steps: the initial operation state of the combined air-conditioning box is a normal state; the combined air-conditioning box starts a fresh air fan and a fresh air valve 105 to continuously or intermittently convey fresh air to the air supply pipeline 10; a sensor group of the combined air-conditioning box acquires one or more environmental information of indoor dry bulb temperature, dew point temperature, wet bulb temperature, moisture content, relative humidity and enthalpy value, and feeds the environmental information back to the combined air-conditioning box; the combined air conditioning box is operated under a cooling and dehumidifying working condition or a cooling and humidifying working condition, and the air supply quantity and/or the temperature and the humidity of the supplied air of the air supply pipeline 10 are/is adjusted so as to keep the temperature and the humidity of the air supply pipeline 10 conveyed to the indoor within the manually set range values.
In this embodiment, can acquire the environmental information of indoor dry bulb temperature, dew point temperature, wet bulb temperature, moisture content, relative humidity and enthalpy value through sensor group to the indoor environmental aspect is judged out to what combined air conditioning case can be accurate, adjusts the humiture of amount of wind and air feed then, in order to keep indoor temperature, humidity value in the range value of manual setting, realizes the purpose through the accurate regulation reduction energy consumption.
The embodiment can be applied to temperature and humidity regulation of a tobacco or cut tobacco storage warehouse, and the storage warehouse is called as an indoor storage. Air parameter sensors are arranged in the room to obtain dry bulb temperature, dew point temperature, wet bulb temperature, moisture content, relative humidity, enthalpy and the like, wherein the dry bulb temperature (english name: dry bulb temperature) is a value read from a dry bulb temperature meter exposed to the air without being directly irradiated by the sun. Dew point (or frost point) temperature (english name: dew temperature) refers to the temperature at which air is cooled to saturation without changes in both moisture content and air pressure. Can adopt control circuit board in the combined air-conditioning box, have serial interface on control circuit board, and control circuit board is last still including CUP or singlechip to control, specific can be: CPU is Silicon Labs C8051F58, memory: 8KByte xdata ram, 2016b for 256byte data ram, and 1014 control boards.
When the combined air-conditioning box operates under the cooling and dehumidifying working conditions, the combined air-conditioning box has normal state operation, low-load state operation and high-load state operation, and can regulate and control operation according to external environment temperature, humidity change and the like so as to meet the effect of controlling indoor high efficiency.
When the humidifying valve 103 and the heating valve 102 in the air supply duct 10 are in a closed state and the dry bulb temperature in the room is higher than a manually set temperature range value, the combined air conditioning box is switched to a normal state operation. When the fan in the air supply pipeline 10 is reduced to the rated minimum rotating speed for operation and the indoor dry bulb temperature is lower than the manually set temperature range value, the combined air-conditioning box is switched to the low-load state for operation. When the meter cooling valve 101 in the air supply duct 10 is adjusted to be in a fully open state and the dew point temperature in the room is higher than the manually set temperature range value, the combined air conditioning box is switched to be operated in a high load state.
Specifically, when the operation state of the combined air-conditioning box is normal, the humidifying valve 103 and the heating valve 102 are in a closed state, the combined air-conditioning box adjusts the opening degree of the meter cooling valve 101, so that the return air dew point temperature in the return air channel is kept within an artificially set range value, and the combined air-conditioning box adjusts the rotating speed of the blower 104, so that the indoor dry bulb temperature is kept within the artificially set range value, and the regulation and control under the normal state are performed, so that the indoor temperature and humidity are ensured, and the energy consumption is low.
When the rotating speed of the blower 104 reaches the minimum rotating speed and the indoor dry bulb temperature is lower than the artificially set range value, the combined air conditioning box switches the normal state operation to the low load state operation.
When the operation state is a low load state, the combined air conditioning box controls the rotation speed of the blower 104 to be set to the minimum rotation speed, and the humidifying valve 103 is closed. The combined air-conditioning box adjusts the opening degree of the meter cooling valve 101 to keep the indoor dew point temperature within the range value set by people, and simultaneously adjusts the opening degree of the heating valve 102 to keep the indoor dry bulb temperature within the range value set by people until the heating valve 102 is closed and the indoor dry bulb temperature is higher than the range value set by people, the operation is switched to the normal state. The influence of coping with environmental temperature and humidity changes is realized, the minimum energy consumption is regulated and controlled, the indoor temperature and humidity are kept, and the practicability is improved.
When the combined air-conditioning box is opened to the maximum by the meter cooling valve 101 in order to adjust the indoor temperature, but the indoor dew-point temperature is still higher than the artificially set range value, the operation state of the combined air-conditioning box is switched to the high-load state operation.
When the operation state is a high-load state, the combined air-conditioning box adjusts the opening degree of the meter cooling valve 101 to maintain the indoor dew point temperature at a set value; or, because the dehumidification is too dry, the humidifying valve 103 is opened and the opening degree is adjusted, so that the humidity value in the adjusting room of the combined air conditioning box is increased synergistically; the combination air conditioning unit adjusts the rotation speed of the blower 104 to maintain the dry bulb temperature in the room within a range value set manually. The temperature and humidity in the room can be regulated and controlled to be within the range value set manually in a short time through the operation in a high load state.
Then, when the rotation speed of the blower 104 is adjusted to the minimum rotation speed and the dry bulb temperature in the room is lower than the manually set range value, the combined air conditioning box adjusts the opening degree of the heating valve 102 to increase the temperature in the room. When the regulation is continued so that the rotation speed of the blower 104 is at a minimum and the heating valve 102 is regulated to be closed, the combined air conditioning box is switched from the high load state operation to the low load state operation.
Through the setting of above-mentioned running state, under the cooling dehumidification operating mode, the regulation and control of combined air conditioner case according to external terminal is in order to match different cold load and wet load for combined air conditioner case operation reaches to indoor temperature, humidity and stabilizes in the scope value of artificial settlement, and the required precision interval of this temperature, humidity can be: temperature requirement of 26 plus or minus 2 ℃ and humidity requirement of 55 plus or minus 5RH percent.
When the combined air conditioning box operates under the cooling and humidifying working conditions, the combined air conditioning box also has normal state operation, low-load state operation and high-load state operation, and can regulate and control operation according to external environment temperature, humidity change and the like so as to meet the effect of controlling indoor high efficiency.
Specifically, when the combined air-conditioning box operates in a normal state and the indoor humidification load is larger than the cold load, the combined air-conditioning box reduces the opening of the humidification valve 103 until the dew point temperature in the air supply channel is maintained in an artificially set range value; the combined air-conditioning box increases the opening degree of the surface cooling valve 101, so that the indoor dry bulb temperature is maintained in a manually set range value; and the combined air-conditioning box can cooperatively regulate the rotating speed of the fan to control the air supply quantity, so that the indoor dew point temperature is maintained within an artificially set range value. When the meter cooling valve 101 is opened to the maximum opening and still cannot meet the indoor temperature requirement, the combined air-conditioning box is switched to the following logic operation:
at this time, if the indoor humidification load is lower than the cold load, the combined air conditioning box increases and adjusts the opening of the humidification valve 103, so that the indoor dew point temperature is maintained within the artificially set range value; the combined air conditioning box reduces and adjusts the opening degree of the meter cooling valve 101, so that the air supply dew point temperature in the air supply pipeline 10 is maintained at an artificially set range value; and, the combined air conditioning box cooperatively adjusts the rotation speed of the blower 104 to control the amount of air delivered to maintain the indoor dry bulb temperature within a manually set range. When the humidifying valve 103 is opened to the maximum opening degree and still cannot meet the indoor humidity requirement, the logic operation is switched to the above logic operation.
When the operation state of the combined air-conditioning box is a low-load state, the rotating speed of the fan is the minimum value, the combined air-conditioning box adjusts the humidifying valve 103 to maintain the indoor dew-point temperature within the range value set artificially, and the combined air-conditioning box adjusts the surface cooling valve 101 to maintain the indoor dry bulb temperature within the range value set artificially.
When the operation state of the combined air-conditioning box is a high-load operation state, the rotating speed of the fan is the maximum value, the combined air-conditioning box adjusts the humidifying valve 103 to maintain the indoor dew-point temperature at the manually set range value, and the combined air-conditioning box adjusts the surface cooling valve 101 to maintain the indoor dry bulb temperature at the manually set range value.
Through the setting of above-mentioned running state, under the cooling humidification operating mode, the regulation and control of combined air conditioner case according to external terminal is in order to match different cold load and wet load for combined air conditioner case operation reaches to indoor temperature, humidity and stabilizes in the scope value of artificial settlement, and the required precision interval of this temperature, humidity can be: the temperature requirement of 26 plus or minus 2 ℃ and the humidity requirement of 55 plus or minus 5RH percent.
In this embodiment, the calculation of the dry bulb temperature is performed according to the value of the moisture content and the relative humidity that can be handled under the cooling and dehumidifying conditions, and then the corresponding air supply temperature can be set according to the dry bulb temperature value. The specific formula is as follows, and the calculation is carried out by substituting the detected numerical value.
T＝f2(D,RH)＝(B1÷(B2-LN(B3×(D÷1000×P÷1000÷(RH×(D÷1000+0.622))))))-B4
B1 ═ 3991.11 in the formula; b2 ═ 18.5916; b3 ═ 7.5; b4 ═ 233.84; t is the dry bulb temperature; RH is relative humidity; d is the moisture content; p is atmospheric pressure; LN is the enthalpy value.
The RH value of the relative humidity is 85% by adopting a chilled water cooling mode, and 90% by adopting a direct expansion cooling mode.
In the embodiment, the moisture content is calculated by obtaining the dry bulb temperature and the relative humidity, and a specific calculation formula is as follows, and corresponding detection values are substituted for calculation.
D＝f1(T,RH)＝622×EXP(A1÷(T+273.15)+A2+A3×(T+273.15)+A4×(T+273.15)^2+A5×(T+273.15)^3+A6×(T+273.15)^4+A7×LN((T+273.15))×RH÷(P-EXP(A1÷(T+273.15)+A2+A3×(T+273.15)+A4×(T+273.15)^2+A5×(T+273.15)^3+A6×(T+273.15)^4+A7×LN((T+273.15))×RH)
In the formula, T is the dry bulb temperature; RH is relative humidity; d is the moisture content; p is atmospheric pressure (1 standard atmospheric pressure 101325 Pa); LN is the enthalpy value; a1 ═ -5.8002206 x 10^ 3; a2 ═ 1.3914993; a3 ═ -4.8640239X 10^ -2; a4 is 4.1764768 multiplied by 10^ -5; a5 ═ -1.4452093X 10^ -8; a6 ═ 0; a7 ═ 6.5459673.
The temperature value of the air to be supplied can be accurately calculated through the formula, the air supply temperature can be corrected according to the feedback condition of the indoor wet load, the temperature is used as the air supply optimization temperature, the chilled water energy consumption and the fan energy consumption are balanced, and the purpose of reducing the comprehensive energy consumption is achieved.
In order to ensure that the combined air-conditioning box can normally operate, the operating environment temperature of the combined air-conditioning box needs to be between 0 and 200 ℃ so as to ensure the regulating and controlling precision of the combined air-conditioning box.
In this embodiment, the sensor group includes a plurality of air parameter sensors and temperature/humidity sensors 20, and the plurality of air parameter sensors and temperature/humidity sensors 20 are used to detect environmental information of the indoor, outdoor, and supply air duct 10. The indoor and outdoor environment information can be clearly obtained by respectively installing an air parameter sensor and an air parameter sensor; meanwhile, a temperature and humidity sensor 20 is installed in each section of the air supply duct 10, for example: a temperature and humidity sensor 20 is respectively installed at the pipe section and the air supply pipe section that provide new trend pipeline, return air pipeline, new trend and return air and mix to the realization is to the accurate understanding of the humiture value of each pipe section, can carry out accurate regulation and control then, the waste of the energy when avoiding adjusting.
In order to better regulate and control the air quantity of the air supply pipeline 10, a fresh air valve 105 is arranged on the fresh air pipeline, a return air valve 106 is arranged on the return air pipeline, the fresh air valve 105 and the return air valve 106 can be adjustable electric valves, stepless regulation is further realized during control, and meanwhile, the air quantity of the air supply pipeline 10 is accurately controlled, so that the accurate regulation and control of indoor temperature and humidity values are ensured.
The combined air conditioning box is in wireless communication connection with an external terminal in the embodiment. The external terminal can be a desktop computer, a notebook computer or a mobile phone and the like, so that regulation and control can be realized through the external terminal, and the purpose of remotely controlling the combined air conditioning box is realized. Meanwhile, the effect of real-time monitoring on the combined air conditioning box can be achieved, and the practicability is improved.
In the embodiment, the operation of the cooling and dehumidifying working condition and the operation of the cooling and humidifying working condition are controlled by analog quantity signals. The surface cooling valve 101, the heating valve 102 and the humidifying valve 103 can be adjustable electric valves, the adjustable electric valves are stepless adjusting valves, and the blower 104 is a rectangular multi-blade air volume adjusting valve, so that stepless adjustment of the blower 104 is realized. The combination type air conditioning box is combined, the analog quantity signal control is adopted to control the cooling valve 101, the heating valve 102, the humidifying valve 103 and the air feeder 104 to adjust, so that the purpose of adjusting and controlling with accurate numerical values is achieved, accurate and rapid adjustment and control of indoor temperature and humidity are achieved, and the problem of energy waste caused by the use of the combination type air conditioning box is avoided.
Although the present invention has been described in detail in the foregoing embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.
Claims (10)
1. A control method of a combined air conditioner box is characterized by comprising the following steps:
the initial operation state of the combined air-conditioning box is a normal state;
the combined air-conditioning box opens a fresh air fan and a fresh air valve to continuously or intermittently convey fresh air to the air supply pipeline;
the sensor group of the combined air-conditioning box acquires one or more environmental information of indoor dry-bulb temperature, dew point temperature, wet-bulb temperature, moisture content, relative humidity and enthalpy value, and feeds the environmental information back to the combined air-conditioning box;
and the combined air conditioning box operates under a cooling and dehumidifying working condition or a cooling and humidifying working condition, and adjusts the air supply quantity and/or the temperature and the humidity of the air supply pipeline so as to keep the temperature and the humidity of the air supply pipeline conveyed to the room within a manually set range value.
2. The control method of a combined air-conditioning box according to claim 1, characterized in that: the operation under the cooling and dehumidifying working condition is as follows:
when a humidifying valve and a heating valve in the air supply pipeline are in a closed state and the indoor dry bulb temperature is higher than a manually set temperature range value, the combined air-conditioning box is switched to a normal state to operate;
when the fan in the air supply pipeline is reduced to the rated minimum rotating speed for operation and the indoor dry bulb temperature is lower than the manually set temperature range value, the combined air-conditioning box is switched to operate in a low-load state;
and when the surface cooling valve in the air supply pipeline is adjusted to be in a fully opened state and the indoor dew point temperature is higher than a manually set temperature range value, the combined air-conditioning box is switched to be operated in a high-load state.
3. The control method of a combined air-conditioning box according to claim 2, characterized in that: when the combined air-conditioning box operates in a normal state, the combined air-conditioning box adjusts the opening degree of a surface cooling valve and the rotating speed of a fan so as to maintain the temperature of the dry balls to be higher than a manually set temperature range value;
when the combined air-conditioning box is in a low-load state, the humidifying valve of the air supply pipeline is closed, and the combined air-conditioning box adjusts the opening degree of the surface cooling valve and the opening degree of the heating valve so as to adjust the temperature of the dry balls to be higher than the manually set temperature range value;
closing the heating valve, and switching the operation of the air conditioning box from a low-load state to a normal state during the combination;
when the combined air conditioner box is in a high-load state, the combined air conditioner adjusts the opening of a surface cooling valve or a humidifying valve, and reduces and adjusts the rotating speed of the fan;
and when the rotating speed of the fan is reduced to the rated minimum rotating speed for operation and the indoor dry bulb temperature is lower than the manually set temperature range value, the air-conditioning box is switched from the high-load state operation to the low-load state operation for adjustment during combination.
4. The control method of a combined air-conditioning box according to claim 1, characterized in that: the operation under the cooling and humidifying working conditions is as follows:
the combined air-conditioning box operates in a normal state,
when the humidifying load in the air supply pipeline is larger than the cold load, the combined air-conditioning box adjusts the surface cooling valve to be completely opened, and the dry bulb temperature is smaller than the manually set range value, so that the combined air-conditioning box increases and adjusts the opening degree of the humidifying valve;
when the humidifying load in the air supply pipeline is smaller than the cold load, the combined air-conditioning box adjusts the humidifying valve to be completely opened, and the moisture content is smaller than a manually set range value, so that the combined air-conditioning box increases and adjusts the opening degree of the surface cooling valve;
when the indoor dew point temperature and the indoor dry bulb temperature are maintained within manually set range values and the rotating speed of the fan is a rated minimum rotating speed value, the combined air-conditioning box operates in a low-load state;
and when the indoor dew point temperature and the indoor dry bulb temperature are maintained within the manually set range values and the rotating speed of the fan is the rated maximum rotating speed value, the combined air-conditioning box runs in a high-load state.
5. The control method of a combined air-conditioning box according to claim 1, characterized in that: the calculation formula of the dry bulb temperature is as follows:
T＝f2(D,RH)＝(B1÷(B2-LN(B3×(D÷1000×P÷1000÷(RH×(D÷1000+0.622))))))-B4
b1 ═ 3991.11 in the formula; b2 ═ 18.5916; b3 ═ 7.5; b4 ═ 233.84; t is the dry bulb temperature; RH is relative humidity; d is the moisture content; p is atmospheric pressure; LN is the enthalpy value.
6. The control method of a combined air-conditioning box according to claim 5, characterized in that: the calculation formula of the moisture content is as follows:
D＝f1(T,RH)＝622×EXP(A1÷(T+273.15)+A2+A3×(T+273.15)+A4×(T+273.15)^2+A5×(T+273.15)^3+A6×(T+273.15)^4+A7×LN((T+273.15))×RH÷(P-EXP(A1÷(T+273.15)+A2+A3×(T+273.15)+A4×(T+273.15)^2+A5×(T+273.15)^3+A6×(T+273.15)^4+A7×LN((T+273.15))×RH)
in the formula, T is the dry bulb temperature; RH is relative humidity; d is the moisture content; p is atmospheric pressure (1 standard atmospheric pressure 101325 Pa); LN is the enthalpy value; a1 ═ -5.8002206 x 10^ 3; a2 ═ 1.3914993; a3 ═ -4.8640239X 10^ -2; a4 is 4.1764768 multiplied by 10^ -5; a5 ═ -1.4452093X 10^ -8; a6 ═ 0; a7 ═ 6.5459673.
7. The control method of a combined air-conditioning box according to claim 1, characterized in that: the environment temperature of the combined air-conditioning box is 0-200 ℃.
8. The control method of a combined air-conditioning box according to claim 1, characterized in that: the sensor group comprises a plurality of air parameter sensors and temperature and humidity sensors, and the air parameter sensors and the temperature and humidity sensors are used for detecting the environmental information of indoor, outdoor and air supply pipelines.
9. The control method of a combined air-conditioning box according to claim 1, characterized in that: the combined air-conditioning box is in wireless communication connection with an external terminal.
10. The control method of a combined air-conditioning box according to claim 1, characterized in that: the operation of the cooling and dehumidifying working condition and the operation of the cooling and humidifying working condition adopt analog quantity signals to control the operation.
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