CN109595840A - Air-conditioning system and its control method - Google Patents
Air-conditioning system and its control method Download PDFInfo
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- CN109595840A CN109595840A CN201710938499.4A CN201710938499A CN109595840A CN 109595840 A CN109595840 A CN 109595840A CN 201710938499 A CN201710938499 A CN 201710938499A CN 109595840 A CN109595840 A CN 109595840A
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- refrigerant flow
- heat exchanger
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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
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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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of air-conditioning systems, the compressor and third heat exchanger of total refrigerant flow are formed including being sequentially connected in series, the first refrigerant flow of composition closed loop is connected to total refrigerant flow, it is connected to the second refrigerant flow of composition closed loop with total refrigerant flow, the third refrigerant flow and control module of composition closed loop are connected to total refrigerant flow；First refrigerant flow is run simultaneously with second refrigerant flow for freezing, and first refrigerant flow, the second refrigerant flow or third refrigerant flow isolated operation are for dehumidifying；The control module is used to control the heat exchange amount of first refrigerant flow, the revolving speed of the on-off of second refrigerant flow and the third refrigerant flow and the compressor and the third heat exchanger.So set, both increasing alternative path for dehumidifying operation, dehumidifying reliability is improved, the demand of computer room Wind Volume is also met.The present invention also provides the control methods of above-mentioned air-conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly to a kind of air-conditioning system and its control method.
Background technique
Air conditioner in machine room is also thermostatic and humidistatic air conditioning unit room special air conditioner, be it is a kind of specialize in that computer room uses to temperature, wet
The highly accurate High Precision Air-conditioning for spending control, not only can control computer room temperature, can also control humidity simultaneously.Nowadays,
The dehumidifying effect of air conditioner in machine room has been increasingly becoming an important technology index in the field.How dehumidifying energy when high load capacity is increased
Power, while still there is dehumidifying effect to have become research hotspot when underload.Air conditioner in machine room is in underload at present, in order to increase
Big moisture removal mainly passes through the following two kinds method and realizes: first is that the method for drop air quantity, i.e., by reducing indoor air quantity, to reduce
Evaporator evaporating temperature achievees the purpose that increase moisture removal when underload.The major defect of this mode is reduction of circulated air
Amount, reduces the rate of ventilation of computer room, is easy to cause the deposition of dust in temperature fluctuation and air, reduce leaving air temp, holds
Computer room temperature fluctuation is easily caused to increase, this is all unfavorable to the operation of server and computer.Second is that passing through control system tune
Big system overheat degree dehumidifies to increase, i.e., reduces the aperture of throttle valve by increasing degree of superheat set point, reduce evaporating temperature
Rapid moisture removal when realizing underload.This mode can make the refrigerant in evaporator be mostly in superheat section, overall effect on moisture extraction
It is bad, also it is easy to cause leaving air temp mixing uneven.
Summary of the invention
Based on above-mentioned, a kind of air-conditioning system that can meet Wind Volume and two demands that dehumidify simultaneously is provided.
In addition, also providing a kind of control method of air-conditioning system that can meet Wind Volume and two demands that dehumidify simultaneously.
A kind of air-conditioning system, including be sequentially connected in series to be formed total refrigerant flow compressor and third heat exchanger, with it is described
First refrigerant flow of total refrigerant flow connection composition closed loop is connected to total refrigerant flow and forms the of closed loop
Two refrigerant flows, the third refrigerant flow and control module that composition closed loop is connected to total refrigerant flow；
First refrigerant flow is run simultaneously with second refrigerant flow for freezing, first refrigerant flow,
Second refrigerant flow or third refrigerant flow isolated operation are for dehumidifying；
The control module is for controlling first refrigerant flow, second refrigerant flow and the third refrigerant stream
The on-off on road, to realize the switching of refrigerating operaton and dehumidifying operation；
The control module is used to control the revolving speed of the compressor and the heat exchange amount of the third heat exchanger simultaneously.
First refrigerant flow includes the first throttle valve being sequentially connected in series, the first heat friendship in one of the embodiments,
Parallel operation and the first valve, and the refrigerant inlet of the first throttle valve is connect with the refrigerant exit of the third heat exchanger；Institute
The refrigerant exit for stating the first valve is connect with the air inlet of the compressor.
Second refrigerant flow includes the second valve being sequentially connected in series, second throttle in one of the embodiments,
With and second heat exchanger, and the refrigerant inlet of second valve is connect with the refrigerant exit of the third heat exchanger；Institute
The refrigerant exit for stating second heat exchanger is connect with the air inlet of the compressor.
The third refrigerant flow includes the third valve being sequentially connected in series, the first heat exchange in one of the embodiments,
Device, check valve, second throttle and second heat exchanger, and the refrigerant inlet of the third valve and the first heat exchanger
Refrigerant exit connection；The refrigerant inlet of the check valve is connect with the refrigerant exit of the first heat exchanger.
The first heat exchanger and the second heat exchanger are arranged in the same wind field in one of the embodiments,
In, and the first heat exchanger and the second heat exchanger are arranged side by side or described on the same cross section of wind field
The downstream of wind field is arranged in first heat exchanger；The upstream of wind field is arranged in the second heat exchanger.
A kind of control method of air-conditioning system, which comprises
The on-off of first refrigerant flow, second refrigerant flow and the third refrigerant flow is controlled, to realize
The switching of refrigerating operaton and dehumidifying operation；
Control runs the heat exchange amount of the third heat exchanger when third refrigerant flow dehumidifies, different negative to realize
Dehumidifying under lotus.
The refrigerating operaton and the switching method of dehumidifying operation include: in one of the embodiments,
Judge whether indoor needs to dehumidify, if so, setting first refrigerant flow, the second refrigerant flow and the
A refrigerant flow in three refrigerant flows is connected, and remaining two refrigerant flows block；Otherwise, the first refrigerant stream is set
Road is connected with the second refrigerant flow, and the third refrigerant flow blocks.
In one of the embodiments, the method also includes:
Judge whether dehumidifying operation needs heat compensation, is connected if so, the third refrigerant flow is arranged, described first
Refrigerant flow and the second refrigerant flow block；Otherwise, first refrigerant flow is arranged to connect, second refrigerant flow and the
Three refrigerant flows block, or setting second refrigerant flow is connected, and first refrigerant flow and third refrigerant flow block.
The air-conditioning system further includes the first blower and the second blower, first blower in one of the embodiments,
It is arranged in the wind field where the first heat exchanger and second heat exchanger；The second blower setting is in the third heat
In wind field where exchanger；The method of dehumidifying under the realization different load includes: when blocking first refrigerant flow
With the second refrigerant flow, when dehumidifying using the third refrigerant flow for having heat compensation, indoor temperature in dehumidifying operation is judged
Whether degree reaches limit value, if so, the revolving speed of second blower is adjusted, to adjust the heat exchange of the third heat exchanger
Otherwise amount maintains the revolving speed of second blower constant.
The step of adjusting second rotation speed of fan in one of the embodiments, include:
When temperature raising in indoor reaches the first setting value, increase the revolving speed of second blower；When indoor temperature
When decline reaches the second setting value, the revolving speed of second blower is reduced；First setting value is greater than the second setting value.
In one of the embodiments, the method also includes:
When blocking the third refrigerant flow, when connecting first refrigerant flow or the dehumidifying operation of the second refrigerant flow,
The revolving speed when revolving speed of the compressor is maintained the air-conditioning system refrigerating operaton is constant.
In one of the embodiments, the method also includes:
The revolving speed that first blower under dehumidifying operation is arranged is maintained the revolving speed of first blower under refrigerating operaton not
Become.
Two evaporators are arranged by side indoors in a kind of air-conditioning system and its control method, and respectively as described the
Heat exchanger and series connection in one refrigerant flow and second refrigerant flow is collectively as the warm in the third refrigerant flow
Exchanger；So set, can be used for freezing when first refrigerant flow is run simultaneously with second refrigerant flow, work as institute
It can be used for dehumidifying when stating the first refrigerant flow, the second refrigerant flow or third refrigerant flow isolated operation, and can be by described
Control module controls the on-off of first refrigerant flow, second refrigerant flow and the third refrigerant flow, to realize
The switching of refrigerating operaton and dehumidifying operation；Pass through specific logic control, additionally it is possible to obtain it is following the utility model has the advantages that
1. not needing the indoor air quantity of reduction unit, any operating condition can meet wanting for air conditioner in machine room Wind Volume
It asks；
2. the revolving speed by adjusting second blower can be realized in regulation room when using third refrigerant flow dehumidifying
Side air-out temperature is greater than return air temperature, is less than return air temperature and is equal to return air temperature, thus is adapted to computer room difference thermic load
Demand；
3. overcoming by reducing throttle valve opening evaporator superheat section caused by dehumidifying to become larger, effect on moisture extraction is bad,
The drawbacks such as the decline of performance caused by being run with compressor high compression ratio and low reliability.
Detailed description of the invention
Fig. 1 is the air-conditioning system schematic diagram equipped with three refrigerant flows；
Fig. 2 is the manner of execution flow chart of dehumidifying operation and refrigerating operaton；
Fig. 3 is the manner of execution flow chart that dehumidifying has heat compensation and empty calory compensation；
Fig. 4 is the method flow diagram that indoor temperature fluctuation range is controlled when dehumidifying has heat compensation；
Fig. 5 is that dehumidifying controls the raised method flow diagram of indoor temperature when having heat compensation；
Fig. 6 is the method flow diagram of control indoor temperature decline when dehumidifying has heat compensation.
Detailed description of the invention: 100. compressors；210. first blowers；220. second blowers；310. first heat exchanger；320. the
Two heat exchangers；330. third heat exchangers；410. first valves；420. second valves；430. third valves；510. first segment
Flow valve；520. second throttle；600. check valve.
Specific embodiment
In this patent document, the various implementations of Fig. 1-6 discussed below and principle or method for describing the disclosure
Example is served only for illustrating, and should not be construed as in any way and limit the scope of the present disclosure.It should be understood by those skilled in the art that
, the principle or method of the disclosure can realize in any appropriate arrangement air-conditioning system.With reference to attached drawing, the preferred reality of the disclosure
Applying example will be described below.In the following description, the detailed description of well-known function or configuration will be omitted, in order to avoid with
Unnecessary details obscures the theme of the disclosure.Moreover, term used herein defines function according to the present invention.Cause
This, the term may according to the intention or usage of user or operator difference.Therefore, term used herein is necessary
Understood based on made description herein.
A kind of air-conditioning system, as shown in Figure 1, including being sequentially connected in series the compressor 100 to form total refrigerant flow and third heat
Exchanger 330, the first refrigerant flow that composition closed loop is connected to total refrigerant flow are connected to total refrigerant flow
Form the second refrigerant flow of closed loop, be connected to total refrigerant flow the third refrigerant flow for forming closed loop and
Control module；
First refrigerant flow is run simultaneously with second refrigerant flow for freezing, first refrigerant flow,
Second refrigerant flow or third refrigerant flow isolated operation are for dehumidifying；
The control module is for controlling first refrigerant flow, second refrigerant flow and the third refrigerant stream
The on-off on road, to realize the switching of refrigerating operaton and dehumidifying operation；
The control module is used to control the revolving speed of the compressor and the heat exchange amount of the third heat exchanger simultaneously.
Wherein, first refrigerant flow includes the first throttle valve 510 being sequentially connected in series, first heat exchanger 310 and
One valve 410, and the refrigerant inlet of the first throttle valve 510 is connect with the refrigerant exit of the third heat exchanger 330；Institute
The refrigerant exit for stating the first valve 410 is connect with the air inlet of the compressor 100.
Second refrigerant flow include the second valve 420 being sequentially connected in series, second throttle 520 and with the second heat exchange
Device 320, and the refrigerant inlet of second valve 420 is connect with the refrigerant exit of the third heat exchanger 330；Described second
The refrigerant exit of heat exchanger 320 is connect with the air inlet of the compressor 100.
The third refrigerant flow include the third valve 430 being sequentially connected in series, first heat exchanger 310, check valve 600,
Second throttle 520 and second heat exchanger 320, and the refrigerant inlet of the third valve 430 and the first heat exchanger
310 refrigerant exit connection；The refrigerant inlet of the check valve 600 is connect with the refrigerant exit of the first heat exchanger 310.
In addition, the first heat exchanger 310 and the second heat exchanger 320 are arranged in the same wind field, and institute
First heat exchanger 310 and the second heat exchanger 320 is stated to be arranged side by side on the same cross section of wind field or described the
The downstream of wind field is arranged in one heat exchanger 310；The upstream of wind field is arranged in the second heat exchanger 320.Wherein, heat exchange
Device upstream and downstream in wind field is arranged, and indoor air can be made to first pass through condensation when using third refrigerant flow dehumidifying
Dehumidifying obtains heat compensation using condenser；Heat exchanger is arranged side by side in wind field with section, and a part of wind can be made to pass through
320 dehumidification by condensation of second heat exchanger is crossed, a part is after 310 heat temperature raising of first heat exchanger again in outlet air
Section mixing；Make air conditioner in machine room under dehumidification mode by relevant logic control, the temperature fluctuation control of indoor is being set
Safe range in.
Air-conditioning system described above has been dehumidify operating energy loss three different refrigerant flows and two kinds of different efficacies
Refrigerant flow is available, so set, being on the one hand that subsequent control increases selectable manner of execution, facilitates according to wind
Field design optimal selection, on the other hand also runs for dehumidifying and increases alternative path, improve the dehumidifying reliability of air conditioner in machine room,
Meanwhile Smaller load dehumidifying and zero load dehumidifying provide system-based in computer room to realize.
According to content described above, this programme additionally provides the control method of air-conditioning system described above, comprising:
The on-off of first refrigerant flow, second refrigerant flow and the third refrigerant flow is controlled, to realize
The switching of refrigerating operaton and dehumidifying operation；
Control runs the heat exchange amount of the third heat exchanger when third refrigerant flow dehumidifies, different negative to realize
Dehumidifying under lotus.
Below in conjunction with the attached drawing in the application control method embodiment, technical solutions in the embodiments of the present application is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part but not all of the embodiments of the present application.
Based on the embodiment in the application, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall in the protection scope of this application.
As shown in Fig. 2, the control method of the air-conditioning system of an embodiment includes the following steps S110~S130.
Step S110: judging whether indoor needs to dehumidify, if so, S120 is thened follow the steps, it is no to then follow the steps S130.
In some cases, indoor does not have refrigeration demand or thermic load smaller to air conditioner in machine room, but has dehumidification, then at this time will
The operating status of the air-conditioning system is adjusted, side is provided with the first heat exchanger to the air-conditioning system indoors
310, system-based is provided to obtain heat compensation under dehumidification mode, can be used for realizing removing under no thermic load or small thermic load
It is wet；Judge whether indoor dehumidifying needs heat compensation both can also can pass through the sky by the control module taking human as judgement
The detection information for adjusting the sensor of device system arrangement to pass back judges automatically；Wherein, artificial judgement is generally used for before and after maintenance down,
It judges automatically and is generally used in computer room operational process.The operating status of the air-conditioning system will be adjusted by judgement above-mentioned,
Make the demand for adapting to refrigeration and dehumidifying in computer room.
Step S120: it connects in first refrigerant flow, second refrigerant flow and the third refrigerant flow
It is any all the way, remaining two-way block.Wherein, first refrigerant flow is arranged to connect, second refrigerant flow and third are cold
It, can in the case where the heat exchange amount of the revolving speed of the compressor 100 and the third heat exchanger 330 is constant when matchmaker's flow path blocks
The evaporator refrigerant temperature in the first heat exchanger 310 is reduced, so that the table temperature of the first heat exchanger 310 is reduced,
Condense the moisture in air more, realization increases moisture removal in the case where not reducing air quantity；Likewise, setting institute
The connection of the second refrigerant flow is stated, when first refrigerant flow and third refrigerant flow block, in the revolving speed of the compressor 100
The refrigerant in the second heat exchanger 320 can be reduced in the case where constant with the heat exchange amount of the third heat exchanger 330 to steam
Sending out temperature condenses the moisture in air more to reduce the table temperature of the second heat exchanger 320, realizes
Increase moisture removal in the case where not reducing air quantity；And the third refrigerant flow is set and is connected, first refrigerant flow and
When second refrigerant flow blocks, what is be passed through in the second heat exchanger 320 is cold after the second throttle 520 throttling
Matchmaker is mainly used to evaporation endothermic, reduces air themperature and condenses the vapor in air, and the first heat exchanger 310
What is be inside passed through is the high temperature refrigerant directly flowed out out of described third heat exchanger 330, without throttling, and the refrigerant state being passed through
It can be adjusted according to the heat exchange amount of the third heat exchanger 330, can specifically be adjusted according to the revolving speed of second blower 220
Section, thus, the air after 320 cooling and dehumidifying of second heat exchanger can be when through the first heat exchanger 310
Heat compensation is obtained, the size for adapting to difference thermic load in indoor when the air-conditioning system dehumidifying operation can be made.Described first is cold
Matchmaker's flow path, the connection of second refrigerant flow and the third refrigerant flow and blocking can pass through first valve 410,
The opening and closing of two valves 420 and third valve 430 is realized.
Step S130: setting first refrigerant flow and the second refrigerant flow are connected, and the third refrigerant flow blocks.
The air-conditioning system runs refrigeration mode at this time, and first valve 410 and second valve 420 are opened, the third
Valve 430 is closed；The first throttle valve 510 is identical with 520 aperture of second throttle, the first heat exchanger 310
It is identical with the evaporator refrigerant temperature in the second heat exchanger 320.
The control method of the air-conditioning system of the present embodiment, by logical to three refrigerant flows being arranged in the air-conditioning system
Disconnected control, the switching of Lai Shixian refrigerating operaton and dehumidifying operation, is designed in this way, control method is simple, reliable in action.
As shown in figure 3, the control method of the air-conditioning system of an embodiment includes the following steps S210~S230.
Step S210: judging whether dehumidifying operation needs heat compensation, if so, thening follow the steps S220, otherwise executes step
Rapid S230.Under normal circumstances, air-conditioning in dehumidifying all along with refrigeration, but in some special cases, such as to temperature and
The higher computer room of humidity required precision then will accurately control leaving air temp during dehumidifying, while also meet Wind Volume
Demand, and the thermic load in computer room is dynamic change with the calorific value of each electronic equipment, so it is necessary to according to setting
Fixed safe temperature range is come when judging the air-conditioning system dehumidifying operation, whether indoor needs heat compensation.Judge room
Whether inside dehumidifying needs heat compensation both can also can pass through the air-conditioner system by the control module taking human as judgement
The detection information that the sensor of arrangement is passed back judges automatically；Wherein, artificial judgement is generally used for before and after maintenance down, is judged automatically
It is generally used in computer room operational process.The operating status of the air-conditioning system will be adjusted by judgement above-mentioned, make adaline
The demand freezed in room and dehumidified.
Step S220: being arranged the third refrigerant flow and connect, and first refrigerant flow and the second refrigerant flow block.
The third refrigerant flow has the function of heat compensation when running dehumidifying, at this point, the third valve 430 is opened, described the
One valve 410 and the second valve 420 are closed, and refrigerant enters in the first heat exchanger 310 from the third valve 430 to be condensed
Or the further heat release of liquid refrigerants, the second throttle 520 of second refrigerant flow is passed through after check valve 600
Reducing pressure by regulating flow is carried out, the evaporation endothermic in the second heat exchanger in second refrigerant flow of the refrigerant after reducing pressure by regulating flow
The gaseous coolant for becoming low-temp low-pressure is sucked by the compressor 100 again to be compressed.By the first heat exchanger 310 and institute
It states second heat exchanger 320 to be arranged in the same wind field, and the downstream of wind field is arranged in the first heat exchanger 310；Institute
The upstream that wind field is arranged in second heat exchanger 320 is stated, so, the sky after 320 cooling and dehumidifying of second heat exchanger
Gas can obtain heat compensation by the first heat exchanger 310, with regulating outlet air temperature.
Step S230: setting first refrigerant flow is connected, and second refrigerant flow and third refrigerant flow block,
Or setting second refrigerant flow is connected, first refrigerant flow and third refrigerant flow block.When the air-conditioning system
Dehumidifying should not heat compensation when, by the third refrigerant flow the third valve 430 close to block the third cold
The circulation of matchmaker's flow path, and first valve 410 is opened, second valve 420 are closed, or by second valve
420 open, and first valve 410 is closed, the first refrigerant flow connection or the second refrigerant stream is separately provided
The evaporating temperature of refrigerant in heat exchanger is corresponded in the refrigerant flow that road is connected to reduce on, and reduces the table of corresponding heat exchanger
Temperature, to increase moisture removal in the case where not reducing air quantity.
The control method of the air-conditioning system of the present embodiment, by having removing for heat compensation to what is be arranged in the air-conditioning system
The selection of wet refrigerant flow and the dehumidifying refrigerant flow of empty calory compensation, the different demands of Lai Shiying indoor dehumidification are especially full
The demand of sufficient computer room dehumidifying, and two classes dehumidifying refrigerant flow can dehumidify on the basis of meeting indoor Wind Volume,
Control method is simple, reliable in action.
In air-conditioning system described above, the air-conditioning system further includes the first blower and the second blower, and described first
Blower is arranged in the wind field where the first heat exchanger and second heat exchanger；Second blower setting is described the
In wind field where three heat exchangers.
Wherein, when being dehumidified using the third refrigerant flow for having heat compensation, in order to realize the dehumidifying under different load,
It needs the heat exchange amount to the third heat exchanger 330 to make adjusting, specifically then adjusts the revolving speed of second blower 220.It adjusts
An embodiment of the control method of 220 revolving speed of the second blower is saved as shown in figure 4, including the following steps S310~S330.
Step S310: judging whether indoor temperature reaches limit value in dehumidifying operation, if so, S320 is thened follow the steps,
It is no to then follow the steps S330.The calorific value of each electronic equipment in computer room is dynamic change, and air-conditioning is in certain a period of time
Fixed when interior operating status, which results in the temperature in computer room will be in certain fluctuation range, in order to make computer room
In each electronic equipment efficient stable work it is necessary to by computer room temperature fluctuation range control setting safe range
Interior, therefore, it is necessary to the real time temperatures for detecting computer room inner sensor to be compared with set temperature, and by the control module into
Row judgement and output control signal.
Step S320: the revolving speed of second blower is adjusted.When air-conditioning system operation has the dehumidifying of temperature-compensating,
The third refrigerant flow is connected to composition closed loop with total refrigerant flow, at this time the first heat exchanger 310 and institute
Third heat exchanger 330 is stated as condenser, and the first heat exchanger 310 is under the third heat exchanger 330
Trip, due to the Wind Volume demand of computer room, so that the wind field of indoor heat exchanger is relatively stable, thus, the first heat exchanger
310 heat exchange amount is determined that 330 heat exchange amount of third heat exchanger lacks then institute by the heat exchange amount of the third heat exchanger 330
The heat exchange amount for stating first heat exchanger 310 is more；The more then described first heat exchangers 310 of 330 heat exchange amount of third heat exchanger
Heat exchange amount it is few；And 330 heat exchange amount of third heat exchanger is in the timing of condensing pressure one, heat exchange amount is by second blower
220 revolving speed control therefore can be by the revolving speed of adjusting second blower, to adjust the heat exchange of the third heat exchanger
Amount.
Step S330: maintain the revolving speed of second blower constant.It maintains the revolving speed of second blower constant, that is, maintains
The heat exchange amount of the third heat exchanger 330 is constant.
Specific air-conditioning system as shown in Figure 5 and Figure 6 adjusts the control method of second rotation speed of fan, including step
S410~S430 and step S510~S530.
It is illustrated in figure 5 dehumidifying and controls the raised method of indoor temperature when having heat compensation.Include the following steps S410
~S430.
Step S410: judging whether temperature raising in indoor reaches the first setting value, if so, S420 is thened follow the steps, it is no
Then follow the steps S430.In order to maintain the efficient stable of electronic equipment to work, the temperature fluctuation in computer room will be controlled in design
In safe range, when the calorific value of computer room inner electronic equipment is greater than the sky at this time plus the heat compensation amount of the air-conditioning system
When the refrigerating capacity of adjusting system, the temperature in computer room will start to increase, and the control module is to the temperature sensing being arranged in computer room
Device detects that temperature information carries out operation, compares and judge, and provides control second blower 220 according to judging result
The relevant action signal of revolving speed is fluctuated with this to control the temperature in computer room in safe range always, ensures that electronic equipment is high
Imitate stable work.
Step S420: increase the revolving speed of second blower 220.Reach the first setting value when judging that indoor temperature increases
When, the heat exchange amount of the third heat exchanger 330 can be increased by increasing the revolving speed of second blower, reduce described first
The heat exchange amount of heat exchanger 310, so that indoor obtains less heat by the cooling air of the second heat exchanger 320
Compensation makes heat compensation amount be less than the refrigerating capacity of air-conditioning plus the calorific value of computer room inner electronic equipment, to reach in computer room
The purpose of cooling.
Step S430: maintain the revolving speed of second blower constant.It maintains the revolving speed of second blower constant, that is, maintains
The heat exchange amount of the third heat exchanger 330 is constant.Reduce unnecessary frequent movement in adjustment process.
Being illustrated in figure 6 dehumidifying has the method for controlling the decline of indoor temperature when heat compensation.Include the following steps S510
~S530.
Step S510: judging whether temperature decline in indoor reaches the second setting value, if so, S520 is thened follow the steps, it is no
Then follow the steps S530.In order to maintain the efficient stable of electronic equipment to work, the temperature fluctuation in computer room will be controlled in design
In safe range, when the calorific value of computer room inner electronic equipment is greater than the sky at this time plus the heat compensation amount of the air-conditioning system
When the refrigerating capacity of adjusting system, the temperature in computer room will start to increase, and the control module is to the temperature sensing being arranged in computer room
Device detects that temperature information carries out operation, compares and judge, and provides control second blower 220 according to judging result
The relevant action signal of revolving speed is fluctuated with this to control the temperature in computer room in safe range always, ensures that electronic equipment is high
Imitate stable work.
Step S520: the revolving speed of second blower 220 is reduced.Reach the second setting value when judging that indoor temperature declines
When, the heat exchange amount of the third heat exchanger 330 can be reduced by reducing the revolving speed of second blower, increase described first
The heat exchange amount of heat exchanger 310, so that indoor obtains more heats by the cooling air of the second heat exchanger 320
Compensation makes heat compensation amount be greater than the refrigerating capacity of air-conditioning plus the calorific value of computer room inner electronic equipment, to reach in computer room
The purpose of heating.
Step S530: maintain the revolving speed of second blower constant.It maintains the revolving speed of second blower constant, that is, maintains
The heat exchange amount of the third heat exchanger 330 is constant.Reduce unnecessary frequent movement in adjustment process.
First setting value described above is greater than the second setting value.
The control method of the air-conditioning system of the present embodiment, by judging the real time temperature of indoor and the size of set temperature
Relationship come adjust dehumidifying run lower heat compensation number, and the revolving speed by adjusting second blower 220 is described to adjust
The heat exchange amount of third heat exchanger 330, and then adjust the heat exchange amount of the first heat exchanger 310, i.e. heat on the inside of regulation room
Measure compensation rate.Method is simple, easy to operate, and precision is higher, can satisfy setting thermic load all thermic load operating conditions below
Temperature adjust.In addition, additional power consumption is not needed not only when carrying out temperature-compensating, instead due to second wind
The reduction of 220 revolving speed of machine enables to reach energy-efficient purpose except complete machine power is declined under wet cooling condition.
In one of the embodiments, when blocking the third refrigerant flow, first refrigerant flow or second are connected
When refrigerant flow dehumidifying operation, the revolving speed when revolving speed of the compressor is maintained the air-conditioning system refrigerating operaton is constant.Such as
This setting, can reduce the evaporating temperature that refrigerant in heat exchanger is corresponded in first refrigerant flow or the second refrigerant flow, drop
The table temperature of low corresponding heat exchanger increases moisture removal to realize in the case where not reducing air quantity.
The revolving speed of first blower is maintained institute under refrigerating operaton under setting dehumidifying operation in one of the embodiments,
The revolving speed for stating the first blower is constant.So that indoor meets the Wind Volume demand of computer room always.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (12)
1. a kind of air-conditioning system, including be sequentially connected in series to be formed total refrigerant flow compressor and third heat exchanger, with it is described total
First refrigerant flow of refrigerant flow connection composition closed loop is connected to the second of composition closed loop with total refrigerant flow
Refrigerant flow, the third refrigerant flow and control module that composition closed loop is connected to total refrigerant flow；
First refrigerant flow is run simultaneously with second refrigerant flow for freezing, first refrigerant flow, second
Refrigerant flow or third refrigerant flow isolated operation are for dehumidifying；
The control module is for controlling first refrigerant flow, second refrigerant flow and the third refrigerant flow
On-off, to realize the switching of refrigerating operaton and dehumidifying operation；
The control module is used to control the revolving speed of the compressor and the heat exchange amount of the third heat exchanger simultaneously.
2. air-conditioning system according to claim 1, which is characterized in that first refrigerant flow includes first be sequentially connected in series
Throttle valve, first heat exchanger and the first valve, and the refrigerant inlet of the first throttle valve and the third heat exchanger
Refrigerant exit connection；The refrigerant exit of first valve is connect with the air inlet of the compressor.
3. air-conditioning system according to claim 1, which is characterized in that second refrigerant flow includes second be sequentially connected in series
Valve, second throttle and and second heat exchanger, and the refrigerant inlet of second valve and the third heat exchanger
Refrigerant exit connection；The refrigerant exit of the second heat exchanger is connect with the air inlet of the compressor.
4. air-conditioning system according to claim 1, which is characterized in that the third refrigerant flow includes the third being sequentially connected in series
Valve, first heat exchanger, check valve, second throttle and second heat exchanger, and the refrigerant inlet of the third valve with
The refrigerant exit of the first heat exchanger connects；The refrigerant inlet of the check valve and the refrigerant of the first heat exchanger go out
Mouth connection.
5. air-conditioning system according to claim 4, which is characterized in that the first heat exchanger and the second heat exchanger
Be arranged in the same wind field, and the first heat exchanger and the second heat exchanger on the same cross section of wind field simultaneously
The downstream of wind field is arranged in row's setting or the first heat exchanger；The upstream of wind field is arranged in the second heat exchanger.
6. a kind of control method based on air-conditioning system described in any one of claim 1-5, which is characterized in that the side
Method includes:
The on-off of first refrigerant flow, second refrigerant flow and the third refrigerant flow is controlled, to realize refrigeration
The switching of operation and dehumidifying operation；
Control runs the heat exchange amount of the third heat exchanger when third refrigerant flow dehumidifies, to realize under different load
Dehumidifying.
7. the control method of air-conditioning system according to claim 6, which is characterized in that the refrigerating operaton and dehumidifying are run
Switching method include:
Judge whether indoor needs to dehumidify, if so, setting first refrigerant flow, the second refrigerant flow and third are cold
A refrigerant flow in matchmaker's flow path is connected, and remaining two refrigerant flows block；Otherwise, be arranged first refrigerant flow and
Second refrigerant flow is connected, and the third refrigerant flow blocks.
8. the control method of air-conditioning system according to claim 7, which is characterized in that the method also includes:
Judge whether dehumidifying operation needs heat compensation, is connected if so, the third refrigerant flow is arranged, first refrigerant
Flow path and the second refrigerant flow block；Otherwise, first refrigerant flow is arranged to connect, second refrigerant flow and third are cold
Matchmaker's flow path blocks, or setting second refrigerant flow is connected, and first refrigerant flow and third refrigerant flow block.
9. the control method of air-conditioning system according to claim 6, the air-conditioning system further includes the first blower and second
Blower, first blower are arranged in the wind field where the first heat exchanger and second heat exchanger；Second wind
Machine is arranged in the wind field where the third heat exchanger；It is characterized in that, the side for realizing the dehumidifying under different load
Method includes: when blocking first refrigerant flow and the second refrigerant flow, using the third refrigerant flow for having heat compensation
When dehumidifying, judge whether indoor temperature reaches limit value in dehumidifying operation, if so, the revolving speed of second blower is adjusted,
To adjust the heat exchange amount of the third heat exchanger, otherwise, maintain the revolving speed of second blower constant.
10. the control method of air-conditioning system according to claim 9, which is characterized in that adjust second rotation speed of fan
The step of include:
When temperature raising in indoor reaches the first setting value, increase the revolving speed of second blower；When indoor temperature declines
When reaching the second setting value, the revolving speed of second blower is reduced；First setting value is greater than the second setting value.
11. the control method of air-conditioning system according to claim 6, which is characterized in that the method also includes:
It is described when connecting first refrigerant flow or the dehumidifying operation of the second refrigerant flow when blocking the third refrigerant flow
The revolving speed when revolving speed of compressor is maintained the air-conditioning system refrigerating operaton is constant.
12. the control method of air-conditioning system according to claim 6, which is characterized in that the method also includes:
Be arranged dehumidifying operation under first blower revolving speed be maintained first blower under refrigerating operaton revolving speed it is constant.
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| CN201710938499.4A CN109595840A (en) | 2017-09-30 | 2017-09-30 | Air-conditioning system and its control method |
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| CN201710938499.4A CN109595840A (en) | 2017-09-30 | 2017-09-30 | Air-conditioning system and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377986A (en) * | 2020-11-11 | 2021-02-19 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
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