CN108518736A - Machine, constant temperature and humidity system and its control method in constant temperature and humidity - Google Patents

Machine, constant temperature and humidity system and its control method in constant temperature and humidity Download PDF

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Publication number
CN108518736A
CN108518736A CN201810297561.0A CN201810297561A CN108518736A CN 108518736 A CN108518736 A CN 108518736A CN 201810297561 A CN201810297561 A CN 201810297561A CN 108518736 A CN108518736 A CN 108518736A
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CN
China
Prior art keywords
humidity
constant temperature
amb
evaporator
temperature
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Pending
Application number
CN201810297561.0A
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Chinese (zh)
Inventor
周志宾
冯志文
陈博强
戴永福
尤文超
杨瑞
周涯宸
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201810297561.0A priority Critical patent/CN108518736A/en
Publication of CN108518736A publication Critical patent/CN108518736A/en
Priority to PCT/CN2018/121530 priority patent/WO2019192210A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of 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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses machine, constant temperature and humidity system and its control method in a kind of constant temperature and humidity, machine in the constant temperature and humidity, including：Wind turbine；First evaporator；Second evaporator, and second evaporator is arranged in parallel with the refrigerant compression cycle of the first evaporator machine in the constant temperature and humidity；First electric expansion valve is arranged in the refrigerant compression cycle of the machine in the constant temperature and humidity and is arranged with first evaporator series, and first electric expansion valve is used to control the cold medium flux in first evaporator.Two evaporators by being arranged in parallel by the present invention, wherein the first electric expansion valve is fully closed, is dehumidified by the second evaporator, and avoiding compressor raising frequency causes refrigerating capacity to increase, and the auxiliary heat of high-power electricity is effectively avoided to open not energy-efficient situation.

Description

Machine, constant temperature and humidity system and its control method in constant temperature and humidity
Technical field
The present invention relates to thermostatic constant wet equipment technical fields, and in particular to machine, constant temperature and humidity system in a kind of constant temperature and humidity And its control method.
Background technology
Constant temperature and humidity machine is one kind of commercial special air-conditioning units, there is national standard limitation in product development process, and with constant temperature The constant temperature and humidity control of the air-conditioning or air-conditioning of constant humidity function is entirely different.
Air conditioner dehumidification principle is will to make the lower evaporator of wind excess temperature so that the temperature of the wind after heat exchange is less than dew point Temperature, water vapor portion in such case leeward can condensation at liquid water droplet.For using the air-conditioning of conventional refrigerant, making It generally can all dehumidify when cold, it is desirable to increase effect on moisture extraction, interior fan delivery can be increased or reduce evaporating temperature.For frequency conversion Thermostatic and humidistatic air conditioning unit, when indoor environment has dehumidification, air-conditioner set (can generally be added by increasing compressor frequency Big compressor height pressure difference is to reduce system low-voltage and evaporating temperature) and open big electric expansion valve step number (increase refrigerant circulation Measure to reducing evaporating temperature) method dehumidify.
But constant temperature and humidity machine inner blower generally can all use alternating current generator, rotating speed non-adjustable.In the case that air quantity is constant Dehumidifying can lead to a result：Compressor raising frequency can cause refrigerating capacity to improve, in the case that indoor load is constant, in order to maintain Constant temperature and humidity needs to open the extra cold of the auxiliary heat counteracting of electricity, and which results in invalid energy consumptions.
Invention content
The invention discloses machine, constant temperature and humidity system and its control methods in a kind of constant temperature and humidity, solve existing constant temperature Because of air quantity constant the problem of will produce extra cold when constant humidity system dehumidifies.
According to an aspect of the present invention, machine in a kind of constant temperature and humidity is disclosed, including：Wind turbine；First evaporator；Second Evaporator, and second evaporator is in parallel with the refrigerant of the first evaporator machine in constant temperature and humidity compression cycle Setting；First electric expansion valve is arranged in the refrigerant compression cycle of the machine in the constant temperature and humidity and is evaporated with described first Device is arranged in series, and first electric expansion valve is used to control the cold medium flux in first evaporator.
Further, machine further includes return air inlet in the constant temperature and humidity, and first evaporator is located at described second and evaporates Between device and the return air inlet.
Further, first evaporator is obliquely installed with second evaporator and forms V-structure.
According to another aspect of the present invention, a kind of constant temperature and humidity system is disclosed, including refrigerant compression cycle and above-mentioned Constant temperature and humidity in machine, refrigerant compression cycle, including：Compressor；First heat exchange loop, first end connect with condenser It connects, the second end of first heat exchange loop is connected to the air inlet of the compressor；Second heat exchange loop, with described One heat exchange loop is in parallel；First evaporator of machine and first electric expansion valve are arranged in institute in the constant temperature and humidity It states on the first heat exchange loop, and first electric expansion valve is located at the upstream of first evaporator；The constant temperature and humidity Second evaporator of interior machine is arranged on second heat exchange loop.
According to another aspect of the present invention, a kind of control method of constant temperature and humidity system, the constant temperature and humidity are disclosed System is above-mentioned constant temperature and humidity system, and the control method includes：Step S10：Obtain environment temperature TID-Amb, obtain setting Temperature TID-Tar, obtain ambient humidity RHID-Amb, obtain setting humidity RHID-Tar；Step S20：According to the environment temperature TID-Amb, the set temperature TID-Tar, the ambient humidity RHID-Amb, the setting humidity RHID-Tar, judge that the constant temperature is permanent Whether wet system enters dehumidifying enhancement mode.
Further, the step S20 includes the following steps：Step S21：Judge the environment temperature TID-AmbWith it is described Ambient humidity RHID-AmbWhether preset range is in；Step S22：Work as TID-Amb＜ TID-Tar+Tdeviation, and RHID-Amb＞ RHID-TarWhen, it controls the constant temperature and humidity system and enters dehumidifying enhancement mode；Step S23：Work as TID-Amb≥TID-Tar+Tdeviation+ 1 or RHID-Amb＜ RHID-TarWhen, it controls the constant temperature and humidity system and exits dehumidifying enhancement mode；Wherein, TdeviationFor temperature essence Degree.
Further, when the constant temperature and humidity system is under the enhancement mode that dehumidifies, compressor (9) raising frequency, control described the The aperture of one electric expansion valve (4) gradually turns down.
Further, the aperture of first electric expansion valve (4) is controlled by following equation：
Wherein, EXVID-TarFor the first electric expansion valve target aperture, EXVID-PntFor the current aperture of the first electric expansion valve, TID-AmbFor indoor environment temperature, TID-TarFor indoor set temperature.
Further, when the thermostatic constant wet control system exits dehumidifying enhancement mode, it is swollen to control first electronics The aperture of swollen valve gradually increases.
According to another aspect of the present invention, a kind of control method of constant temperature and humidity system, the constant temperature and humidity are disclosed System is above-mentioned constant temperature and humidity system, and the control method includes：Step S10：Obtain environment temperature TID-Amb, obtain setting Temperature TID-Tar, obtain ambient humidity RHID-Amb, obtain setting humidity RHID-Tar, obtain the refrigerant inlet pipe of second evaporator Temperature TID-In；Step S20：According to the environment temperature TID-Amb, the set temperature TID-Tar, the ambient humidity RHID-Amb、 The setting humidity RHID-Tar, second evaporator refrigerant inlet pipe temperature TID-In, whether judge the constant temperature and humidity system Into dehumidifying enhancement mode.
Further, step S20 includes the following steps：Step S21：Judge the environment temperature TID-Amb, the environmental wet Spend RHID-Amb, the refrigerant inlet pipe temperature TID-InWhether preset range is in；Step S22：Meet T when simultaneouslyID-Amb＜ TID-Tar+ Tdeviation、RHID-Amb＞ RHID-Tar、TID-InWhen ＞ A conditions, controls the constant temperature and humidity system and enter dehumidifying enhancement mode；Step Rapid S23：When meeting TID-Amb≥TID-Tar+Tdeviation+1、RHID-Amb＜ RHID-TarOr TID-InWhen either condition in≤B, control Constant temperature and humidity system exits dehumidifying enhancement mode；Wherein, TdeviationFor temperature accuracy, A is default safe temperature, and B is to preset Cold temperature.
Further, when the constant temperature and humidity system is under the enhancement mode that dehumidifies, compressor raising frequency controls first electricity The aperture of sub- expansion valve gradually turns down.
Further, the aperture of first electric expansion valve (4) is controlled by following equation：
Wherein,
EXVID-TarFor the first electric expansion valve target aperture, EXVID-PntFor the current aperture of the first electric expansion valve, TID-Amb For indoor environment temperature, TID-TarFor indoor set temperature.
Further, when the thermostatic constant wet control system exits dehumidifying enhancement mode, it is swollen to control first electronics The aperture of swollen valve gradually increases.
The present invention utilizes the electronic expansion valve controls cold medium flux of one of them by being arranged in parallel two evaporators Size, when indoor dehumidification demand is larger but indoor load is not high, unit enters dehumidifying enhancement mode, wherein the first electricity Sub- expansion valve is fully closed, is dehumidified by the second evaporator, passes through the refrigerant of two evaporators originally, is only passed through now from the second evaporator It crosses, this causes to increase by the refrigerant circulation of the second evaporator, evaporating temperature can be caused to decline in the case that thermic load is certain, It is more advantageous to dehumidifying, while the first electric expansion valve is closed, only goes to complete to freeze and dehumidify by the second evaporator, such case phase When in reducing disengagement area and air quantity, do not return makes refrigerating capacity increase because of compressor raising frequency, so as to avoid due to perseverance Constant temperature and humidity machine generates extra cold because air quantity is constant, and the auxiliary heat of high-power electricity is caused to open not energy-efficient situation.
Description of the drawings
Fig. 1 is the structural schematic diagram of machine in the constant temperature and humidity of the embodiment of the present invention；
Fig. 2 is the fundamental diagram of the constant temperature and humidity system of the embodiment of the present invention；
Fig. 3 is the control method work flow diagram of the constant temperature and humidity system of the embodiment of the present invention；
Fig. 4 is the control method work flow diagram of the constant temperature and humidity system of another embodiment of the present invention；
Legend：1, wind turbine；2, the first evaporator；3, the second evaporator；4, the first electric expansion valve；5, the second electronic expansion Valve；6, return air inlet；7, the first auxiliary thermal of electricity；8, the second auxiliary thermal of electricity；9, compressor；10, the first heat exchange loop；11、 Second heat exchange loop；12, temperature sensor.
Specific implementation mode
With reference to embodiment, the present invention will be further described, but is not limited to the content on specification.
The invention discloses machines in a kind of constant temperature and humidity, including：Wind turbine 1, the first evaporator 2, the second evaporator 3 and first Electric expansion valve 4, wind turbine 1 are arranged in constant temperature and humidity at the air outlet in the air duct of machine；First evaporator 2 is arranged in wind turbine 1 Between the return air inlet 6 in air duct；Second evaporator 3 is arranged between wind turbine 1 and return air inlet 6, and the second evaporator 3 and first steams It is arranged in parallel in the refrigerant compression cycle of the hair machine in constant temperature and humidity of device 2；Machine is arranged in constant temperature and humidity in first electric expansion valve 4 Refrigerant compression cycle in and be arranged in series with the first evaporator 2, the first electric expansion valve 4 is for controlling the first evaporator 2 Interior cold medium flux.
By being arranged in parallel two evaporators, and the electronic expansion valve controls cold medium flux size of one of them is utilized, When indoor dehumidification demand is larger but indoor load is not high, unit enters dehumidifying enhancement mode, wherein the first electronic expansion Valve 4 is fully closed, is dehumidified by the second evaporator 3, passes through the refrigerant of two evaporators originally, only passes through now from the second evaporator 3, this Cause to increase by the refrigerant circulation of the second evaporator 3, evaporating temperature can be caused to decline in the case that thermic load is certain, more had Conducive to dehumidifying, while the first electric expansion valve 4 is closed, and only goes to complete to freeze by the second evaporator 3 and dehumidifying, such case are suitable In reduce disengagement area and heat exchange air quantity, do not return makes refrigerating capacity increase because of compressor raising frequency, so as to avoid due to Constant temperature and humidity fan delivery is constant to will produce extra cold, and the auxiliary heat of high-power electricity is caused to open not energy-efficient situation.
Moreover, in the case where the not high auxiliary thermal power of indoor electric of thermic load is not high, to ensure effect on moisture extraction, may lead Refrigerating capacity is excessive, and the auxiliary thermogenetic shortage of heat of electricity causes indoor environment temperature out of control to offset.By by two evaporators simultaneously Connection setting, and using the electronic expansion valve controls cold medium flux sizes of one of them, only by the second evaporator 3 go to complete refrigeration and Dehumidifying, such case, which is equivalent to, reduces disengagement area and air quantity, the phenomenon that avoid the occurrence of temperature control.
In the above-described embodiments, machine further includes in constant temperature and humidity：Second electric expansion valve 5, the setting of the second electric expansion valve 5 It is arranged in series in constant temperature and humidity in the refrigerant compression cycle of machine and with the second evaporator 3, for controlling in the second evaporator 3 Cold medium flux, between the second evaporator 3 and return air inlet 6, the first evaporator 2 inclines the first evaporator 2 with the second evaporator 3 Tiltedly it is arranged and forms V-structure.By individually being controlled by electric expansion valve, when indoor environment is larger to dehumidification but hot negative When lotus is not high, unit can only be dehumidified using the second evaporator 3 by the cold medium flux in electronic expansion valve controls evaporator, Without causing refrigerating capacity to increase, to effectively avoid indoor temperature out of control or energy consumption increase.Moreover, because the first evaporator 2 between the second evaporator 3 and return air inlet 6, and the first evaporator 2 and the second evaporator 3 are formed v-angle structure, from And wind field distribution is had adjusted, the return air entered from return air inlet 6 is after the first evaporator 2 close to return air inlet 6, air quantity and wind speed All opposite to reduce, to make air quantity and demeanour by the second evaporator 3 also reduce relatively, the reduction of air quantity can prevent heat exchange amount Excessive, wind speed attenuating, which can be more advantageous to, removes Water vapor condensation in return air, to make constant temperature and humidity machine improve effect on moisture extraction Meanwhile extra cold is not will produce also.
In the above-described embodiments, wet machine further includes in constant temperature perseverance：The auxiliary 7 and second electric auxiliary thermal 8 of thermal of first electricity, the The one auxiliary thermal 7 of electricity is arranged between the first evaporator 2 and wind turbine 1；The setting of second electricity auxiliary thermal 8 the second evaporator 3 with Between wind turbine 1.Temperature control is may further ensure that by the auxiliary thermal of electricity.
According to another aspect of the present invention, a kind of constant temperature and humidity system is disclosed, including refrigerant compression cycle and above-mentioned Machine in constant temperature and humidity, refrigerant compression cycle include：Compressor 9, the first heat exchange loop 10 and the second heat exchange loop 11, first The first end of heat exchange loop 10 is connect with condenser, and the second end of the first heat exchange loop 10 connects with the air inlet of compressor 9 It is logical；Second heat exchange loop 11 is in parallel with the first heat exchange loop 10；The first evaporator 2 and the first electronics of machine in constant temperature and humidity Expansion valve 4 is arranged on the first heat exchange loop 10, and the first electric expansion valve 4 is located at the upstream of the first evaporator 2；Constant temperature is permanent Second evaporator 3 of wet interior machine is arranged on the second heat exchange loop 11.By the way that two heat exchange loops in parallel are arranged, and will Two evaporators are separately positioned on two heat exchange loops, and are utilized cold in the one of evaporator of electronic expansion valve controls Matchmaker's uninterrupted, when indoor dehumidification demand is strong but indoor load is not high, unit enters dehumidifying enhancement mode, wherein First electric expansion valve 4 of 2 upstream of the first evaporator is fully closed, is dehumidified by the second evaporator 3, original by the cold of two evaporators Matchmaker only passes through from the second evaporator 3 now, this leads to the refrigerant by the second heat exchange loop 11 where the second evaporator 3 Internal circulating load increases, and evaporating temperature can be caused to decline in the case that thermic load is certain, be more advantageous to dehumidifying, while the first electronic expansion Valve 4 is closed, and only goes to complete to freeze and dehumidify by the second evaporator 3, and such case, which is equivalent to, reduces disengagement area and air quantity, because This, avoiding compressor raising frequency causes refrigerating capacity to increase, and the auxiliary heat of high-power electricity is effectively avoided to open not energy-efficient situation.
According to another aspect of the present invention, a kind of control method of constant temperature and humidity system is disclosed, constant temperature and humidity system is Above-mentioned constant temperature and humidity system, the second electric expansion valve 5 is provided on the second heat exchange loop 11, and the second electric expansion valve 5 is used Cold medium flux size in the second evaporator 3 of control, control method include：
Step S10：Obtain environment temperature TID-Amb, obtain set temperature TID-Tar, obtain ambient humidity RHID-Amb, acquisition sets Determine humidity RHID-Tar；
Step S20：According to environment temperature TID-Amb, set temperature TID-Tar, ambient humidity RHID-Amb, setting humidity RHID-Tar, judge whether constant temperature and humidity system enters dehumidifying enhancement mode.
In the above-described embodiments, step S20 includes the following steps：
Step S21：Judge environment temperature TID-AmbWith ambient humidity RHID-AmbWhether preset range is in；
Step S22：Work as TID-Amb＜ TID-Tar+Tdeviation, and RHID-Amb＞ RHID-TarWhen, control constant temperature and humidity system into Enter the enhancement mode that dehumidifies；
Step S23：Work as RHID-Amb≥TID-Tar+TdeviationOr RHID-Amb＜ RHID-TarWhen, control constant temperature and humidity system is moved back Go out the enhancement mode that dehumidifies；
Wherein, TdeviationFor temperature accuracy.
In the above-described embodiments, when constant temperature and humidity system is under the enhancement mode that dehumidifies, 9 raising frequency of compressor controls the first electricity The aperture of sub- expansion valve 4 gradually turns down, and the aperture of the second electric expansion valve 5 is constant.
In the above-described embodiments, the aperture of the first electric expansion valve 4 is controlled by following equation：
Wherein,
EXVID-TarFor electric expansion valve target aperture, EXVID-PntFor the current aperture of electric expansion valve, TID-AmbFor indoor ring Border temperature, TID-TarFor indoor set temperature.
In the above-described embodiments, when thermostatic constant wet control system exits dehumidifying enhancement mode, the first electronic expansion is controlled The aperture of valve 4 gradually increases, and the aperture of the second electric expansion valve 5 is constant.
By the above method, since the condition of dehumidifying enhancement mode is TID-Amb＜ TID-Tar+Tdeviation, so TID-Amb- TID-Tar+TdeviationIt is a negative, so EXVID-Tar=EXVID-Pnt+ negative, the first electric expansion valve 4 can turn down always until 0, the first heat exchange loop 10 is closed, this leads to the refrigerant circulation by the second heat exchange loop 11 where the second evaporator 3 Amount increases, and evaporating temperature can be caused to decline in the case that thermic load is certain, be more advantageous to dehumidifying, simultaneously because the first electronic expansion Valve 4 is closed, and only goes to complete to freeze and dehumidify by the second evaporator 3, and such case, which is equivalent to, reduces heat exchange area and air quantity, because This, avoiding compressor raising frequency causes refrigerating capacity to increase, and the auxiliary heat of high-power electricity is effectively avoided to open not energy-efficient situation.
Since the first electric expansion valve 4 can be closed under dehumidifying enhancement mode, the refrigerant by another second evaporator 3 is caused to follow Circular rector increases, and the refrigerant inlet pipe temperature of the second evaporator 3 can reduce on the basis of the original, when the refrigerant inlet pipe of the second evaporator When temperature is less than -1 DEG C, evaporator can evaporate not exclusively in the case that thermic load is constant indoors, and compressor is caused largely to return liquid, And general constant temperature and humidity system is both provided with anti-freeze protection, does not only result in refrigerating efficiency reduction, and system operation is unstable.
To solve the above-mentioned problems, the invention discloses another embodiments, and this embodiment disclose a kind of constant temperature and humidities The control method of system, constant temperature and humidity system are above-mentioned constant temperature and humidity system, and second is provided on the second heat exchange loop 11 Electric expansion valve 5, the second electric expansion valve 5 are used to control the cold medium flux size in the second evaporator 3, the second evaporator 3 It is provided with temperature sensor 12 on refrigerant inlet pipeline, temperature sensor 12 is used to obtain the refrigerant of the second evaporator 3 into tube temperature Degree, control method include：
Step S10：Obtain environment temperature TID-Amb, obtain set temperature TID-Tar, obtain ambient humidity RHID-Amb, acquisition sets Determine humidity RHID-Tar, obtain the refrigerant inlet pipe temperature T of the second evaporator 3ID-In；
Step S20：According to environment temperature TID-Amb, set temperature TID-Tar, ambient humidity RHID-Amb, setting humidity RHID-Tar, refrigerant inlet pipe temperature TID-In, judge whether constant temperature and humidity system enters dehumidifying enhancement mode.
In the above-described embodiments, step S20 includes the following steps：
Step S21：Judge environment temperature TID-Amb, ambient humidity RHID-Amb, refrigerant inlet pipe temperature TID-InWhether in default Range；
Step S22：Meet T when simultaneouslyID-Amb＜ TID-Tar+Tdeviation、RHID-Amb＞ RHID-Tar、TID-InWhen ＞ A conditions, Control constant temperature and humidity system enters dehumidifying enhancement mode；
Step S23：When meeting TID-Amb≥TID-Tar+Tdeviation+1≥TID-Amb≥TID-TarTdeviation+1、RHID-Amb＜ RHID-TarOr TID-InWhen either condition in≤B, control constant temperature and humidity system exits dehumidifying enhancement mode；
Wherein, TdeviationFor temperature accuracy, generally 0.5 DEG C, A is default safe temperature, and B is default supercooling temperature.
In the above-described embodiments, the value range of A is 3 DEG C~5 DEG C.
In the above-described embodiments, the value range of B is 1 DEG C~3 DEG C.
In the above-described embodiments, in step S22, when constant temperature and humidity system is under the enhancement mode that dehumidifies, compressor 9 works Frequency gradually increases, and the aperture of the first electric expansion valve 4 gradually turns down, and the aperture of the second electric expansion valve 5 is constant.
In the above-described embodiments, the aperture of the first electric expansion valve 4 is controlled by following equation：
Wherein,
EXVID-TarFor the first electric expansion valve target aperture, EXVID-PntFor the current aperture of the first electric expansion valve, TID-Amb For indoor environment temperature, TID-TarFor indoor set temperature.
In the above-described embodiments, in step S23, when thermostatic constant wet control system exits dehumidifying enhancement mode, first The aperture of electric expansion valve 4 gradually increases to normally, and the aperture of the second electric expansion valve 5 is constant.
By the above method, cause refrigerating capacity to increase avoiding compressor raising frequency, effectively avoids the high-power auxiliary heat of electricity Open not energy-efficient situation.Simultaneously as the setting temperature sensor on 3 inlet pipe of the second evaporator, is steamed by detection second It sends out device inlet pipe temperature and as control condition, causes anti-freeze to be protected so as to prevent the enhancement mode because entrance dehumidifies Shield ensures system operation reliability while improving dehumidifying drop ability.
Obviously, the above embodiment of the invention be only to clearly illustrate example of the present invention, and not be Restriction to embodiments of the present invention.For those of ordinary skill in the art, on the basis of the above description also It can make other variations or changes in different ways.Here all embodiments can not be exhaustive.It is every to belong to this Row of the obvious changes or variations that the technical solution of invention is extended out still in protection scope of the present invention.

Claims (14)

1. machine in a kind of constant temperature and humidity, which is characterized in that including：
Wind turbine (1)；
First evaporator (2)；
Second evaporator (3), and second evaporator (3) and the first evaporator (2) machine in the constant temperature and humidity It is arranged in parallel in refrigerant compression cycle；
First electric expansion valve (4) is arranged in the refrigerant compression cycle of the machine in the constant temperature and humidity and is steamed with described first Hair device (2) is arranged in series, and first electric expansion valve (4) is used to control the cold medium flux in first evaporator (2).
2. machine in constant temperature and humidity according to claim 1, which is characterized in that machine further includes return air inlet in the constant temperature and humidity (6), first evaporator (2) is between second evaporator (3) and the return air inlet (6).
3. machine in constant temperature and humidity according to claim 2, which is characterized in that first evaporator (2) and described second Evaporator (3) is obliquely installed and forms V-structure.
4. a kind of constant temperature and humidity system, which is characterized in that permanent including refrigerant compression cycle and claim 1-3 any one of them Machine in constant temperature and humidity, the refrigerant compression cycle, including：
Compressor (9)；
First heat exchange loop (10), first end is connect with condenser, the second end of first heat exchange loop (10) and institute State the air inlet connection of compressor (9)；
Second heat exchange loop (11), it is in parallel with the first heat exchange loop (10)；
First evaporator (2) of machine and first electric expansion valve (4) are arranged described first in the constant temperature and humidity On heat exchange loop (10), and first electric expansion valve (4) is located at the upstream of first evaporator (2)；
Second evaporator (3) of machine is arranged on second heat exchange loop (11) in the constant temperature and humidity.
5. a kind of control method of constant temperature and humidity system, the constant temperature and humidity system is the constant temperature and humidity system described in claim 4 System, which is characterized in that the control method includes：
Step S10：Obtain environment temperature TID-Amb, obtain set temperature TID-Tar, obtain ambient humidity RHID-Amb, it is wet to obtain setting Spend RHID-Tar；
Step S20：According to the environment temperature TID-Amb, the set temperature TID-Tar, the ambient humidity RHID-Amb, described set Determine humidity RHID-Tar, judge whether the constant temperature and humidity system enters dehumidifying enhancement mode.
6. control method according to claim 5, which is characterized in that the step S20 includes the following steps：
Step S21：Judge the environment temperature TID-AmbWith the ambient humidity RHID-AmbWhether preset range is in；
Step S22：Work as TID-Amb＜ TID-Tar+Tdeviation, and RHID-Amb＞ RHID-TarWhen, control the constant temperature and humidity system into Enter the enhancement mode that dehumidifies；
Step S23：Work as TID-Amb≥TID-Tar+Tdeviation+ 1 or RHID-Amb＜ RHID-TarWhen, it controls the constant temperature and humidity system and moves back Go out the enhancement mode that dehumidifies；
Wherein, TdeviationFor temperature accuracy.
7. control method according to claim 6, which is characterized in that when the constant temperature and humidity system is in dehumidifying enhancement mode Under, compressor (9) raising frequency, the aperture for controlling first electric expansion valve (4) gradually turns down.
8. control method according to claim 7, which is characterized in that the aperture of first electric expansion valve (4) is pressed Row formula controls：
Wherein,
EXVID-TarFor the first electric expansion valve target aperture, EXVID-PntFor the current aperture of the first electric expansion valve, TID-AmbFor room Interior environment temperature, TID-TarFor indoor set temperature.
9. control method according to claim 6, which is characterized in that add when the thermostatic constant wet control system exits dehumidifying When strong mode, the aperture for controlling first electric expansion valve (4) gradually increases.
10. a kind of control method of constant temperature and humidity system, the constant temperature and humidity system is the constant temperature and humidity system described in claim 4 System, which is characterized in that the control method includes：
Step S10：Obtain environment temperature TID-Amb, obtain set temperature TID-Tar, obtain ambient humidity RHID-Amb, it is wet to obtain setting Spend RHID-Tar, obtain the refrigerant inlet pipe temperature T of second evaporator (3)ID-In；
Step S20：According to the environment temperature TID-Amb, the set temperature TID-Tar, the ambient humidity RHID-Amb, described set Determine humidity RHID-Tar, second evaporator (3) refrigerant inlet pipe temperature TID-In, judge whether the constant temperature and humidity system enters Dehumidify enhancement mode.
11. control method according to claim 10, which is characterized in that step S20 includes the following steps：
Step S21：Judge the environment temperature TID-Amb, the ambient humidity RHID-Amb, the refrigerant inlet pipe temperature TID-InWhether In preset range；
Step S22：Meet T when simultaneouslyID-Amb＜ TID-Tar+Tdeviation、RHID-Amb＞ RHID-Tar、TID-InWhen ＞ A conditions, control The constant temperature and humidity system enters dehumidifying enhancement mode；
Step S23：When meeting TID-Amb≥TID-Tar+Tdeviation+1、RHID-Amb＜ RHID-TarOr TID-InEither condition in≤B When, control constant temperature and humidity system exits dehumidifying enhancement mode；
Wherein, TdeviationFor temperature accuracy, A is default safe temperature, and B is default supercooling temperature.
12. control method according to claim 11, which is characterized in that when the constant temperature and humidity system reinforces mould in dehumidifying Under formula, compressor (9) raising frequency, the aperture for controlling first electric expansion valve (4) gradually turns down.
13. control method according to claim 12, which is characterized in that the aperture of first electric expansion valve (4) is pressed Following equation controls：
Wherein,
EXVID-TarFor the first electric expansion valve target aperture, EXVID-PntFor the current aperture of the first electric expansion valve, TID-AmbFor room Interior environment temperature, TID-TarFor indoor set temperature.
14. control method according to claim 11, which is characterized in that when the thermostatic constant wet control system exits dehumidifying When enhancement mode, the aperture for controlling first electric expansion valve (4) gradually increases.
CN201810297561.0A 2018-04-04 2018-04-04 Machine, constant temperature and humidity system and its control method in constant temperature and humidity Pending CN108518736A (en)

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