CN105526681B - A kind of dehumidification control method, system and the air-conditioning of underload refrigerated dehumidification air-conditioning - Google Patents
A kind of dehumidification control method, system and the air-conditioning of underload refrigerated dehumidification air-conditioning Download PDFInfo
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- CN105526681B CN105526681B CN201610054297.9A CN201610054297A CN105526681B CN 105526681 B CN105526681 B CN 105526681B CN 201610054297 A CN201610054297 A CN 201610054297A CN 105526681 B CN105526681 B CN 105526681B
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 128
- 238000004378 air conditioning Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000033228 biological regulation Effects 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000005057 refrigeration Methods 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 8
- 238000011068 loading method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 239000000306 component Substances 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
-
- 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
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of dehumidification control method, system and the air-conditioning of underload refrigerated dehumidification air-conditioning, wherein method includes, and refrigeration or the function of dehumidifying in rack are opened according to the humidity selection of return air in rack；When the humidity that rack heat load is less than return air in the cold of compressor low frequency output and rack has dehumidification more than humidity threshold values, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser coil pipe, when the humidity of return air in cold and rack of the rack heat load not less than the output of compressor low frequency has dehumidification no more than humidity threshold values, adapt to carry out compressor raising frequency or frequency reducing regulation；When in-cabinet temperature reaches dehumidifying low temperature threshold values in dehumidification process, it is cabinet-heating stablizing machine in-cabinet temperature to open controllable ptc heater.The present invention is by the combination of compressor varying capacity regulation technology and part coil pipe dehumidifying technology, and structure design is simple and reliable, and action component is few, stable temperature control in rack.
Description
Technical field
The present invention relates to data center's field of air conditioning, more particularly to a kind of dehumidifying of underload refrigerated dehumidification air-conditioning
Control method, system and air-conditioning.
Background technology
In data center field, environment temperature, relative humidity and the normal operation of the server of data center are closely bound up.
IT kind equipments are made up of numerous chips, component, and temperature factor is most important as influence electronic component failure one
Factor, for some circuits, reliability is almost completely dependent on thermal environment；And when the relative humidity of air is more than 65%,
Surface attachment a layer thickness of object is 0.001 ~ 0.01 micron of moisture film, when relative humidity humidity is 100%, the thickness of moisture film
For 10 microns.Such moisture film easily causes " conductive path " or arcing, the serious reliability for reducing circuit.
Therefore, for the information technoloy equipment and server of data center, whether precision air conditioner possesses the essence of temperature and humidity
Close control function is significant for the normal use of data center products.So in traditional data center machine room, it is
Avoid the humidity too high, it will usually using drop air quantity dehumidifying；In laboratory, the special application field such as air-conditioning or wine cellar air-conditioning, right
Humidity required precision is extra high, can enable the scheme of part coil pipe dehumidifying.And for rack data center and modularization number
According to the application scenario at center, mainly there is the methods of drop air quantity and heating compensation to be dehumidified at present, but the shortcomings that certain be present：
Air quantity dehumidifying is dropped：When rack IT server loads are smaller, when opening dehumidifying, compressor is still freezing, air quantity
After reduction, leaving air temp is lower, can cause cold passage temperature drop quickly, high frequent start-stop, effect on moisture extraction is bad, and meeting
Condensation problem is caused to occur.
Dehumidify heating compensation：Heating is opened, increases the compressor opening time, extends the dehumidifying time, but have the drawback that
Energy waste is caused, by consuming electrically heated energy, offsets part cold, to reach lifting leaving air temp, extends compressor
Opening time, that is, dehumidify time lengthening.
Underloading desiccant cooling：Using double evaporators, Partial shrinkage machine wasted work is consumed, offsets part refrigerating capacity, but exist
The shortcomings that be design and installation complexity, take U bit spaces it is big, cause client's rack to be lacked with U positions；Control device is more, control system
The shortcomings of complexity, failure risk is high, and later maintenance cost is high.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of removing for underload refrigerated dehumidification air-conditioning
Wet control method, system and air-conditioning, it is combined by contracting machine varying capacity regulation technology with part coil pipe dehumidifying technology, humiture control
System is stable, and structure design is simple and reliable.
Technical scheme is as follows：
A kind of dehumidification control method of underload refrigerated dehumidification air-conditioning, comprises the following steps：
A, refrigeration or the function of dehumidifying in rack are opened according to the humiture selection of return air in rack；;
B, the humidity for being less than return air in the cold of compressor low frequency output and rack when rack heat load is more than humidity valve
When value has dehumidification, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser coil pipe, when rack heat is negative
When the humidity for carrying return air in cold and rack not less than the output of compressor low frequency has dehumidification no more than humidity threshold values, fit
Raising frequency should be carried out to compressor or frequency reducing is adjusted；
C, when in-cabinet temperature reaches dehumidifying low temperature threshold values in dehumidification process, open controllable ptc heater and add for rack
Heat is stablizing machine in-cabinet temperature.
In the dehumidification control method of above-mentioned underload refrigerated dehumidification air-conditioning, also include step S before the step A：
Humidity threshold values with return air humidity parameter contrast in rack is set, and is provided for judging whether to open PTC heating
The dehumidifying low temperature threshold values of device.
In the dehumidification control method of above-mentioned underload refrigerated dehumidification air-conditioning, the step B is specifically included：
Cold is exported when rack heat load is less than contracting machine low-limit frequency, and the humidity of return air is higher than humidity threshold values in rack
When, regulation compressor is downconverted to minimum cold output and opens solenoid valve closes part evaporator coil, flows through the steaming of closing
The return air stream for sending out device coil pipe and the low-temperature airflow for flowing through evaporator coil are mixed for the interior temperature and humidity of control rack；
When the humidity of return air in cold and rack of the rack heat load not less than the output of compressor low frequency is not more than humidity
When threshold values has dehumidification, adapt to carry out compressor raising frequency or frequency reducing regulation.
In the dehumidification control method of above-mentioned underload refrigerated dehumidification air-conditioning, the step C specifically also includes：
When rack heat load is less than compressor low-limit frequency output cold, the temperature in dehumidification process in rack reaches dehumidifying
During low temperature threshold values threshold values, open the electrodeless regulation quantity of heat given up of controllable silicon ptc heater, control ptc heater and maintain in rack
Temperature.
A kind of dehumidification control system of underload refrigerated dehumidification air-conditioning, including:
Judge module is contrasted, for opening refrigeration or the work(of dehumidifying in rack according to the humiture selection of return air in rack
Energy；;
Adjustment module, for being less than the humidity of return air in the cold and rack of the output of compressor low frequency when rack heat load
When having dehumidification more than humidity threshold values, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser coil pipe,
When the humidity of return air in cold and rack of the rack heat load not less than the output of compressor low frequency is removed no more than humidity threshold values
During wet demand, adapt to carry out compressor raising frequency or frequency reducing regulation；
Heating module, for when in-cabinet temperature reaches dehumidifying low temperature threshold values in dehumidification process, opening controllable PTC heating
Device is cabinet-heating stablizing machine in-cabinet temperature.
In the dehumidification control system of above-mentioned underload refrigerated dehumidification air-conditioning, in addition to pre-set module, its be used for set with
The humidity threshold values that return air humidity parameter contrasts in rack, and be provided for judging whether the dehumidifying low temperature valve for opening ptc heater
Value.
In the dehumidification control system of above-mentioned underload refrigerated dehumidification air-conditioning, the adjustment module includes：
First adjustment unit, for being less than contracting machine low-limit frequency output cold, and return air in rack when rack heat load
When humidity is higher than humidity threshold values, regulation compressor is downconverted to minimum cold output and opens solenoid valve closes part evaporator plate
Pipe, the return air stream for flowing through the evaporator coil of closing and the low-temperature airflow for flowing through evaporator coil are mixed for control rack
Interior temperature and humidity；
Second adjustment module, for when return air in cold and rack of the rack heat load not less than the output of compressor low frequency
Humidity no more than humidity threshold values have dehumidification when, adapt to compressor carry out raising frequency or frequency reducing regulation.
In the dehumidification control system of above-mentioned underload refrigerated dehumidification air-conditioning, the heating module, it is additionally operable to when rack heat is negative
Carry and be less than compressor low-limit frequency output cold, when the temperature in dehumidification process in rack reaches dehumidifying low temperature threshold values, unlatching can
Control the temperature in the electrodeless regulation quantity of heat given up maintenance rack of silicon ptc heater, control PCT heaters.
The present invention also provides a kind of underload refrigerated dehumidification air-conditioning, includes the underload refrigerated dehumidification air-conditioning of any of the above-described
Dehumidification control system.
Dehumidification control method, system and the air-conditioning of a kind of underload refrigerated dehumidification air-conditioning provided by the present invention, pass through pressure
The combination of contracting machine varying capacity regulation technology and part coil pipe dehumidifying technology, structure design is simple and reliable, and action component is few, dehumidifying effect
Rate is high；In rack data center, load is low, in the case of envionmental humidity height, Intelligent dehumidifying is carried out, with reference to compressor variable frequency
Function, temperature and the moisture stable stable temperature control in range of set value, rack is controlled to ensure cabinet-type data center and mould
The long-term reliability service of block data center products.
Brief description of the drawings
Fig. 1 is the flow chart of the dehumidification control method of middle-low load refrigerated dehumidification air-conditioning of the present invention；
Fig. 2 is the module frame chart of the dehumidification control system of middle-low load refrigerated dehumidification air-conditioning of the present invention；
Fig. 3 is the stream schematic diagram of middle-low load refrigerated dehumidification air-conditioning of the present invention；
Fig. 4 is the schematic internal view of middle-low load refrigerated dehumidification air-conditioning of the present invention.
Embodiment
The present invention provides a kind of dehumidification control method, system and the air-conditioning of underload refrigerated dehumidification air-conditioning, to make the present invention
Purpose, technical scheme and effect it is clearer, clear and definite, referring to the drawings and give an actual example to the present invention further specifically
It is bright.It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Referring to Fig. 1, and with reference to shown in Fig. 3 and Fig. 4, air-conditioning of the invention is rack precision air conditioner by compressor 1, cold
The parts such as condenser 2, restricting element 3, magnetic valve 4, evaporator 5, refrigeration pipe 6, indoor fan 7, ptc heater 8 form.
The dehumidification control method of underload refrigerated dehumidification air-conditioning provided by the invention, its step include：
S100, the function of freezing in rack or dehumidify is opened according to the humiture selection of return air in rack；.
The controller of rack precision air conditioner can be continued through in air return humiture probe detection rack in normal operation
The temperature and relative humidity of return air；The cold of the heat load of rack data center and the output of the low frequency of compressor 1 is contrasted simultaneously.Now
The controller of rack precision air conditioner can judge temperature prioritised or humidity priority according to the humiture of return air in rack, so as to judge
System opens refrigeration or dehumidification function.Exported for example, rack load is more than the low frequency cold of compressor 1, no dehumidification；Rack
Load matches with the low frequency cold of compressor 1, no dehumidification：Rack load is less than the low-limit frequency cold of compressor 1 and matched, nothing
Dehumidification：Rack load is more than the low-limit frequency cold of compressor 1 and exported, and has dehumidification：Rack load is less than compressor 1 most
Low frequency cold exports, and has dehumidification etc..
S200, when rack heat load is less than the humidity of return air in the cold of compressor low frequency output and rack it is more than humidity
When threshold values has dehumidification, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser coil pipe, when rack heat
When load has dehumidification not less than the humidity of return air in the cold and rack of the output of compressor low frequency no more than humidity threshold values,
Adapt to carry out compressor raising frequency or frequency reducing is adjusted.
That is precision air conditioner controller will gather the temperature and relative humidity of return air in air-conditioning in real time in normal operation, when
Detect in rack without refrigeration demand, and when return air humidity be higher than humidity threshold values, there is dehumidification, now controller output dehumidifies
Instruction, open dehumidification function.In case of a low load, by closing part coil pipe, aobvious cold output is reduced, increases dehumidifying
Amount, enables relative humidity to control in setting range, it is ensured that cabinet-type data center and modular data center server apparatus
It is stable and reliable.When without dehumidification, rack is adapted to by exporting suitable cold to the raising frequency of compressor 1 or frequency reducing regulation
Interior loading demand.
S300, when in dehumidification process in-cabinet temperature reach dehumidifying low temperature threshold values when, it is rack to open controllable ptc heater
Heat to stablize machine in-cabinet temperature.I.e. when rack heat load is less than compressor low-limit frequency output cold, machine in dehumidification process
When temperature in cabinet reaches dehumidifying low temperature threshold values, controllable silicon ptc heater, the control electrodeless regulation heat outputting of ptc heater are opened
Amount maintains the temperature in rack.
Specifically, being exported when rack load is less than the low-limit frequency cold of compressor 1, compressor 1 is by minimizing frequency
When, refrigerating capacity output loads still greater than rack, if now opening dehumidification function, interior of equipment cabinet temperature still can progressively decline, now,
Cabinet air conditioner can start the PTC electrical heating of standby controllable silicon regulation, by the electrodeless output heating amount of ptc heater 8, now add
Heat, which need to only export very little, can meet the temperature stabilization of interior of equipment cabinet；After subsequent clients are rack loading, controller can intelligence
It can judge whether controllable silicon PTC electrical heating works on, not waste client's energy, suitable for various exceedingly odious low load applications
Situation.
Further, also include before the step S100：Humidity valve with return air humidity parameter contrast in rack is set
Value, and be provided for judging whether the dehumidifying low temperature threshold values for opening ptc heater.
Specifically, when rack heat load is not less than the humidity of return air in the cold of the low frequency of compressor 1 output and rack not
When having dehumidification more than humidity threshold values, adapt to carry out compressor 1 raising frequency or frequency reducing regulation.
Exported and during without dehumidification when rack load is more than the low frequency cold of compressor 1, the control of rack precision air conditioner
Device processed can continue through return air temperature and relative humidity in air return humiture probe detection rack, detect in normal operation
When loading larger to rack, compressor 1 can carry out raising frequency regulation, and now dehumidify magnetic valve 4 is failure to actuate, the overall pipe of evaporator 5
Use, the cold of the raising frequency output matching heat load of compressor 1, adapt to loading demand in cabinet.
When rack load matches with the low frequency cold of compressor 1 and during without dehumidification, rack precision air conditioner controller
In normal operation, return air temperature and relative humidity in air return humiture probe detection rack are continued through, is detecting rack
When loading relatively low, compressor 1 can carry out frequency reducing regulation, export suitable cold, adapt to loading demand in cabinet.
Matched and during without dehumidification when rack load is less than the low-limit frequency cold of compressor 1, rack precision air conditioner control
Device processed continues through return air temperature and relative humidity in air return humiture probe detection rack, detected in normal operation
When rack load is very low, compressor 1 can carry out frequency reducing regulation, export minimum cold, while evaporator 5 is closed in the action of magnetic valve 4
Part coil pipe, reduce evaporator 5 and show cold output, by mixed wind effect, adapt to loading demand in cabinet, now in-cabinet temperature is steady
Setting range is scheduled on to pinch.
Understand, in equipment cabinet server underload, compressor 1 is operated using low frequency by variable frequency adjustment, reduces compression
The refrigerating capacity of machine 1, reach the purpose for saving the energy；When client is that rack loads, compressor 1 can automatically adjust frequency, to adapt to
Rack loads refrigeration requirement.
Cold is exported when rack heat load is less than the low-limit frequency of compressor 1, and the humidity of return air is higher than humidity valve in rack
During value, regulation compressor 1 is downconverted to minimum cold output and opens solenoid valve 4 closes the coil pipe of partial vaporiser 5, makes return air stream
Low-temperature airflow with flowing through the coil pipe of evaporator 5 is mixed for the interior temperature and humidity of control rack.
Detect that return air humidity is higher than humidity valve in rack when rack load is more than the output of the low-limit frequency cold of compressor 1
During value, i.e., adjust defeated to minimum refrigerating capacity with dehumidification, now controller output dehumidifying instruction, the progress frequency reducing of compressor 1
Go out, now magnetic valve 4 acts, and closes the coil pipe of partial vaporiser 5, increases effect on moisture extraction, and the part coil pipe closed is low without low temperature
Compression refrigerant circulates, and by being inner blower 7, return air stream is mixed with flowing through the low-temperature airflow of dehumidifying coil, makes air conditioning exhausting
Temperature will not be too low, it is ensured that compressor 1 can carry out refrigerated dehumidification, control rack inside humiture for a long time.
When rack load is less than the output of the low-limit frequency cold of compressor 1, interior of equipment cabinet temperature can be gradually reduced, and work as detection
When return air humidity is higher than humidity threshold values in rack, i.e., with dehumidification, now controller output dehumidifying instruction, compressor 1
Carry out frequency reducing to adjust to the output of minimum refrigerating capacity, now magnetic valve 4 acts, and closes the coil pipe of partial vaporiser 5, increases dehumidifying effect
Fruit, and the part coil pipe closed circulates without low-temperature low-pressure refrigerant, the return air stream passed through and the low temperature gas for flowing through dehumidifying coil
Stream mixing, air conditioning exhausting temperature is set not decline too fast, when air-conditioning control panel detects that in-cabinet temperature drops to low temperature restriction point,
Standby controllable silicon PTC electrical heating is opened, ptc heater 8 matches with cold, electrodeless regulation quantity of heat given up, it is ensured that warm in rack
Degree be will not continue to decline, and compressor 1 can be dehumidified for a long time, humiture in stable cabinet.
The rack precision air conditioner with underload refrigerated dehumidification of patent of the present invention, compressor 1 are adjusted using varying capacity, are steamed
Send out device 5 and use part coil pipe dehumidification design, plus the electrically heated standby functions of controllable silicon PTC, be applicable in rack data
The various situation applications of the heart and modular data center, and it is easy for installation, maintenance is few, and the reliability of compressor 1 is high, saves energy
Source.
Rack precision air conditioner with underload refrigerated dehumidification function, refrigeration module core component are frequency-changeable compressors 1, are removed
The core component of wet module is evaporation coil.In the application scenario of rack underload, when having dehumidification, the frequency reducing of compressor 1 is adjusted
Section, precision air conditioner control panel intelligent control magnetic valve 4 act, and close the stream of partial vaporiser 5, so as to reduce evaporating temperature, reach
To more preferable effect on moisture extraction.On the other hand, liquid refrigerant of the part coil pipe of closing due to not being passed through low-temp low-pressure, air-flow
When flowing through the part coil pipe, do not exchange heat substantially, the air-flow that the portion temperature is basically unchanged and the low-temperature airflow by dehumidifying heat exchange
After mixing, it can be ensured that leaving air temp will not be too low, never avoids the risk of rack condensation.
When rack load is very low, compressor 1 carries out frequency reducing regulation, regardless of whether having dehumidification, if controller detects
When dropping to restriction point to temperature, magnetic valve 4 is automatically turned on, closes the part coil pipe of evaporator 5, increase refrigerant is in evaporator
Flow velocity in coil pipe, it is ensured that for compressor 1 when low frequency is run, oil return effect is still excellent, avoids the low frequency of compressor 1 from running
Oil return is bad and then burns the risk of compressor 1.
Referring to Fig. 2, the present invention also provides a kind of dehumidifying control of underload refrigerated dehumidification air-conditioning based on above-mentioned control method
System processed, including:
Judge module 410 is contrasted, for opening what is freezed in rack or dehumidify according to the humiture selection of return air in rack
Function；;As detailed above.
Adjustment module 420, for being less than return air in the cold and rack of the output of compressor low frequency when rack heat load
When humidity has dehumidification more than humidity threshold values, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser disk
Pipe, when the humidity of return air in cold and rack of the rack heat load not less than the output of compressor low frequency has no more than humidity threshold values
During dehumidification, adapt to carry out compressor raising frequency or frequency reducing regulation;As detailed above.
Heating module 430, for when in-cabinet temperature reaches dehumidifying low temperature threshold values in dehumidification process, opening controllable PTC
Heater is cabinet-heating stablizing machine in-cabinet temperature;As detailed above.
In the dehumidification control system of described underload refrigerated dehumidification air-conditioning, in addition to module is pre-seted, it is used to set
The humidity threshold values contrasted with return air humidity parameter in rack, and be provided for judging whether the dehumidifying low temperature for opening ptc heater
Threshold values;As detailed above.
In the dehumidification control system of described underload refrigerated dehumidification air-conditioning, the adjustment module 420 includes：
First adjustment unit, for being more than compressor low-limit frequency output cold, and return air in rack when rack heat load
Humidity when being higher than humidity threshold values, regulation compressor is downconverted to minimum cold output and opens solenoid valve closes part evaporator plate
Pipe, flow through the return air stream of the evaporator coil of closing（This fraction has neither part nor lot in heat exchange）With flowing through the low of evaporator coil
Warm air is mixed for the interior temperature and humidity of control rack;As detailed above.
In the dehumidification control system of described underload refrigerated dehumidification air-conditioning, the adjustment module 420 also includes：
Second adjustment module, for when return air in cold and rack of the rack heat load not less than the output of compressor low frequency
Humidity no more than humidity threshold values have dehumidification when, adapt to compressor carry out raising frequency or frequency reducing regulation;As detailed above.
In the dehumidification control system of described underload refrigerated dehumidification air-conditioning, the heating module 430, it is additionally operable to work as rack
Heat load is less than compressor low-limit frequency output cold, when the temperature in dehumidification process in rack reaches initial cryogenic threshold values, opens
Open the temperature in the electrodeless regulation quantity of heat given up maintenance rack of controllable silicon ptc heater, control ptc heater 8;Specific as above institute
State.
A kind of underload refrigerated dehumidification air-conditioning, include the Dehumidification controlling system of the underload refrigerated dehumidification air-conditioning of any of the above-described
System.Be noted that modular data center（Frequency-changeable compressor adds part coil pipe）Underload refrigerated dehumidification method application,
Also should belong in such design protection category.
In summary, dehumidification control method, system and the air-conditioning for a kind of underload refrigerated dehumidification air-conditioning that invention is provided,
By the combination of compressor varying capacity regulation technology and part coil pipe dehumidifying technology, structure design is simple and reliable, and action component is few,
Dehumidification rate is high, and in rack data center, load is low, in the case of envionmental humidity height, Intelligent dehumidifying is carried out, with reference to compression
Machine frequency conversion function, temperature and moisture stable are controlled in range of set value, guarantee cabinet-type data center and modular data center
The long-term normal operation of product.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, wanted for example, all these modifications and variations should all belong to right appended by the present invention
The protection domain asked.
Claims (10)
1. a kind of dehumidification control method of underload refrigerated dehumidification air-conditioning, it is characterised in that comprise the following steps：
A, refrigeration or the function of dehumidifying in rack are opened according to the humiture selection of return air in rack；
B, when the humidity that rack heat load is less than return air in the cold of compressor low frequency output and rack has more than humidity threshold values
During dehumidification, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser coil pipe, when rack heat load not
When having dehumidification no more than humidity threshold values less than the humidity of return air in the cold and rack of the output of compressor low frequency, adaptation pair
Compressor carries out raising frequency or frequency reducing regulation；
C, when in-cabinet temperature reaches dehumidifying low temperature threshold values in dehumidification process, open controllable ptc heater and used for cabinet-heating
To stablize machine in-cabinet temperature.
2. the dehumidification control method of underload refrigerated dehumidification air-conditioning according to claim 1, it is characterised in that the step
Also include step S before A：
Humidity threshold values with return air humidity parameter contrast in rack is set, and is provided for judging whether to open ptc heater
Dehumidify low temperature threshold values.
3. the dehumidification control method of underload refrigerated dehumidification air-conditioning according to claim 1, it is characterised in that the step
B is specifically included：
When rack heat load is less than compressor low-limit frequency output cold, and the humidity of return air is higher than humidity threshold values in rack,
Regulation compressor is downconverted to minimum cold output and opens solenoid valve closes part evaporator coil, flows through the evaporator of closing
The return air stream of coil pipe is mixed for the interior temperature and humidity of control rack with flowing through the low-temperature airflow of evaporator coil；
When the humidity of return air in cold and rack of the rack heat load not less than the output of compressor low frequency is not more than humidity threshold values
When having dehumidification, adapt to carry out compressor raising frequency or frequency reducing regulation.
4. the dehumidification control method of underload refrigerated dehumidification air-conditioning according to claim 1, it is characterised in that the A steps
Suddenly specifically include：Controller judges temperature prioritised or humidity priority according to humiture, freezes or removes so as to judge that system is opened
It is wet.
5. the dehumidification control method of underload refrigerated dehumidification air-conditioning according to claim 1, it is characterised in that the step
C specifically also includes：
When rack heat load is less than compressor low-limit frequency output cold, the temperature in dehumidification process in rack reaches dehumidifying low temperature
During threshold values, the temperature in the electrodeless regulation quantity of heat given up maintenance rack of controllable silicon ptc heater, control ptc heater is opened.
A kind of 6. dehumidification control system of underload refrigerated dehumidification air-conditioning, it is characterised in that including:
Judge module is contrasted, for opening refrigeration or the function of dehumidifying in rack according to the humiture selection of return air in rack；
Adjustment module, the humidity for being less than return air in the cold and rack of the output of compressor low frequency when rack heat load are more than
When humidity threshold values has dehumidification, frequency reducing regulation is carried out to compressor and controls closed electromagnetic valve partial vaporiser coil pipe, works as machine
Cabinet heat load has dehumidifying to need not less than the humidity of return air in the cold and rack of the output of compressor low frequency no more than humidity threshold values
When asking, adapt to carry out compressor raising frequency or frequency reducing regulation；
Heating module, for when in-cabinet temperature reaches dehumidifying low temperature threshold values in dehumidification process, opening controllable ptc heater to be
Cabinet-heating is stablizing machine in-cabinet temperature.
7. the dehumidification control system of underload refrigerated dehumidification air-conditioning according to claim 6, it is characterised in that also include pre-
Setup module, it is used to set the humidity threshold values with return air humidity parameter contrast in rack, and is provided for judging whether to open
The dehumidifying low temperature threshold values of ptc heater.
8. the dehumidification control system of underload refrigerated dehumidification air-conditioning according to claim 6, it is characterised in that the regulation
Module includes：
First adjustment unit, for when rack heat load be less than compressor low-limit frequency output cold, and in rack return air it is wet
When degree is higher than humidity threshold values, regulation compressor is downconverted to minimum cold output and opens solenoid valve closes part evaporator coil,
The return air stream for flowing through the evaporator coil of closing is mixed for control rack with the low-temperature airflow for flowing through evaporator coil
Interior temperature and humidity；
Second adjustment module, for when rack heat load not less than compressor low frequency output cold and rack in return air it is wet
When degree has dehumidification no more than humidity threshold values, adapt to carry out compressor raising frequency or frequency reducing regulation.
9. the dehumidification control system of underload refrigerated dehumidification air-conditioning according to claim 6, it is characterised in that the heating
Module, it is additionally operable to when rack heat load is less than compressor low-limit frequency output cold, the temperature in dehumidification process in rack reaches
During dehumidifying low temperature threshold values, open the electrodeless regulation quantity of heat given up of controllable silicon ptc heater, control PCT heaters and maintain in rack
Temperature.
10. a kind of underload refrigerated dehumidification air-conditioning, it is characterised in that including the underload system described in any one of claim 6 to 9
The dehumidification control system of cold dehumidification air conditioner.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106123474B (en) * | 2016-06-23 | 2019-01-08 | 珠海格力电器股份有限公司 | Method and device for controlling humidity in a refrigerated cabinet |
| CN109982548B (en) * | 2019-03-22 | 2022-10-28 | 青岛海尔空调电子有限公司 | Electric cabinet and control method |
| CN110260421B (en) * | 2019-05-29 | 2021-02-23 | 广东海悟科技有限公司 | Fan and compressor control method in dehumidification mode of variable frequency air conditioner |
| CN110325023B (en) * | 2019-08-14 | 2024-07-02 | 深圳云海技术有限公司 | Miniature data center and low-running condensation-preventing heat dissipation method thereof |
| CN110762782B (en) * | 2019-12-30 | 2020-04-24 | 宁波奥克斯电气股份有限公司 | Low-temperature dehumidification control method and device and air conditioner |
| CN214757587U (en) * | 2020-06-23 | 2021-11-16 | 青岛海信电子设备股份有限公司 | Cabinet |
| CN111867330B (en) * | 2020-07-24 | 2023-03-28 | 广州远正智能科技股份有限公司 | Method and system for adjusting communication machine building machine room based on IT load change |
| CN113983661B (en) * | 2021-10-25 | 2023-12-29 | 漳州科华电气技术有限公司 | Computer room air conditioner control method, terminal and storage medium |
| CN115307279B (en) * | 2022-08-12 | 2025-06-06 | 广东欧科空调制冷有限公司 | A cabinet air conditioner anti-condensation control method, device and cabinet air conditioner |
| CN115900007B (en) * | 2023-03-09 | 2023-06-23 | 浙江德塔森特数据技术有限公司 | Temperature-adjusting and dehumidifying method and device for rack-mounted air conditioner |
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