CN107575971B - Evaporative water chilling unit and control method - Google Patents
Evaporative water chilling unit and control method Download PDFInfo
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- CN107575971B CN107575971B CN201710794760.8A CN201710794760A CN107575971B CN 107575971 B CN107575971 B CN 107575971B CN 201710794760 A CN201710794760 A CN 201710794760A CN 107575971 B CN107575971 B CN 107575971B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 93
- 239000003507 refrigerant Substances 0.000 claims abstract description 81
- 239000000498 cooling water Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The invention provides an evaporative water chilling unit and a control method, wherein the evaporative water chilling unit comprises: a compressor (1) and an evaporative condenser (2); the air-cooled precooling heat exchanger (8) is arranged between the compressor (1) and the evaporative condenser (2); and the water-cooling type precooling heat exchanger (9) is arranged between the compressor (1) and the evaporative condenser (2) and is connected with the air-cooling type precooling heat exchanger (8) in parallel. Compared with the air cooling single precooling mode in the prior art, the water precooling mode is added, and the water precooling mode has smaller power consumption than the air precooling mode, so that the power consumption of the unit is reduced while the unit is subjected to scale inhibition, and the energy efficiency of the unit is improved; meanwhile, the air pre-cooling and the water pre-cooling work simultaneously to cool the refrigerant, so that the cooling and heat release efficiency of the refrigerant is effectively improved, and the heat exchange capacity of the unit is improved.
Description
Technical field
The invention belongs to refrigeration technology fields, and in particular to a kind of vaporation-type water cooler and control method.
Background technique
With the fast development of China's track transportation industry, scale production is gradually expanded in air-conditioning equipment matched with subway station
Industry, vaporation-type water cooler are exactly to meet its high energy efficiency, round-the-clock, variable working condition, without the few market demand of cooling tower, land occupation.
But vaporation-type water cooler is faced with a variety of industry issues, hinders its development and promotes.Including heat exchanger surface
Fouling is serious, and wet-bulb depression is big round the clock, unit region poor universality etc.；Lead to fluctuation of service, reliability is poor, heat-energy transducer
Power decline, maintenance expense is high, and projected life is short etc..
Many engineers and technicians increase surface air cooler or finned heat exchanger before condenser, but this method is faced with energy
It is poor to imitate, and is affected by ambient wet bulb temperature (relative humidity), temperature and humidity variation round the clock, cannot effectively slow down heat exchanger surface knot
The phenomenon that dirt, and fluctuation of service cause comfort poor, poor user experience.
Due to vaporation-type water cooler in the prior art there are the efficiencies of scale inhibition (slowing down fouling) means low, exchange capability of heat
It is low, applicability is poor, fluctuation of service, cause comfort poor, technical problems such as poor user experience, therefore present invention research is set
Count out a kind of vaporation-type water cooler and control method.
Summary of the invention
Therefore, slow down the technical problem to be solved in the present invention is that vaporation-type water cooler in the prior art is overcome to exist
Efficiency low defect when fouling, to provide a kind of vaporation-type water cooler and control method.
The present invention provides a kind of vaporation-type water cooler comprising：
Compressor and evaporative condenser；
Wind-cooling type precool heat exchanger device, is set between the compressor and the evaporative condenser；
Water-cooling type precool heat exchanger device, be set between the compressor and the evaporative condenser and with it is described air-cooled
Type precool heat exchanger device is connected in parallel.
Preferably, the water-cooling type precool heat exchanger device includes cooling water cycle water case and the casing that is set in the water tank
Heat exchanger, refrigerant flow in described sleeve pipe heat exchanger.
Preferably, the outlet pipe of the cooling water cycle water case is connected with the water inlet pipe of the evaporative condenser.
Preferably, water pump is additionally provided between the cooling water cycle water case and the evaporative condenser.
Preferably, the evaporative condenser includes vaporation-type refrigerant heat exchanger tube, spray system, wherein the water inlet pipe with
The spray system is connected.
Preferably, the evaporative condenser further includes the wind being arranged in the vaporation-type refrigerant heat exchanger tube corresponding position
Machine.
Preferably, control valve is additionally provided in the parallel branch where the Wind-cooling type precool heat exchanger device.
Preferably, pressure sensor is additionally provided on the gas exhaust piping of the compressor.
Preferably, the Wind-cooling type precool heat exchanger device is finned heat exchanger.
The present invention also provides a kind of control methods of vaporation-type water cooler, use vaporation-type water cooler above-mentioned,
According to the different operating conditions of outdoor temperature and humidity, the switching control that evaporative condenser is pre-chilled is adjusted.
Preferably, when including pressure sensor and control valve：
As pressure P≤P1 of pressure sensor detection, judge then to close control valve as high temperature low humidity operating condition at this time, make
Refrigerant only passes through the water-cooling type precool heat exchanger device and flows to the evaporative condenser；
As the pressure P of pressure sensor detection>When P1, judge then to open control valve at this time as high temperature and humidity operating condition, so that
Refrigerant passes through the water-cooling type precool heat exchanger device respectively and Wind-cooling type precool heat exchanger device flows to the evaporative condenser；
Wherein the P1 is that refrigerant operating condition changes preset pressure value.
A kind of vaporation-type water cooler and control method provided by the invention have the advantages that：
1. vaporation-type water cooler of the invention and control method, by the compressor and the evaporative condenser
Between and the water-cooling type precool heat exchanger device that is arranged of the mode in parallel with the Wind-cooling type precool heat exchanger device, can be relative to existing
The air-cooled mode being singly pre-chilled of technology increases the mode of water pre-cooling, the power consumption being pre-chilled due to the mode of water pre-cooling relative to wind
It is smaller, thus while carrying out slowing down fouling to unit, also effectively improve the efficiency of unit；Simultaneously because wind pre-cooling with
Water pre-cooling is worked at the same time to carry out cooling effect to refrigerant, also effectively improves the cooling exothermal efficiency of refrigerant, improves unit
Exchange capability of heat；
2. vaporation-type water cooler of the invention and control method, in high temperature low humidity, by the water at low temperature in water tank
Condenser refrigerant is pre-chilled, refrigerant temperature in condenser is reduced, is reduced since under high temperature low moisture environments, general Wind-cooling type is pre-
Power caused by device for cooling is higher, the poor situation of overall performance.Refrigerant temperature after reducing in condenser simultaneously means to steam
The evaporated quantity of water of hairdo condenser surface is reduced, and scaling rate reduces；
3. sleeve heat exchange is pre-chilled in water in high temperature and humidity in vaporation-type water cooler of the invention and control method
In the case of the pre-cooling of device, parallel connection increases by a routing condenser inlet cold wind and finned heat exchanger is pre-chilled, and works along both lines into one
Step reduces refrigerant temperature in condenser, reduces the heat exchange deficiency of high load capacity condenser caused by hot and humid environment, promotes complete machine
Refrigerating capacity.Refrigerant temperature after reducing in condenser simultaneously means that the evaporated quantity of water on evaporative condenser surface is reduced, fouling
Rate reduces；
4. vaporation-type water cooler of the invention and control method solve under full working scope (high temperature and humidity, high temperature low humidity), most
The refrigerant of evaporative condenser is pre-chilled in limits, reduces condensation temperature, reduces due to its pipe surface water evaporation that exchanges heat
And the scale generated.
Detailed description of the invention
Fig. 1 is the system flow structural schematic diagram of vaporation-type water cooler of the invention.
Appended drawing reference is expressed as in figure：
1, compressor；2, evaporative condenser；20, water inlet pipe；21, spray system；3, electric expansion valve；4, package evaporates
Device；5, water pump；6, blower；7, vaporation-type refrigerant heat exchanger tube；8, Wind-cooling type precool heat exchanger device；9, water-cooling type precool heat exchanger device；91,
Cooling water cycle water case；91a, outlet pipe；92, double-tube heat exchanger；11, pressure sensor；12, control valve.
Specific embodiment
As shown in Figure 1, the present invention provides a kind of vaporation-type water cooler comprising：
Compressor 1 and evaporative condenser 2；
Wind-cooling type precool heat exchanger device 8 is set between the compressor 1 and the evaporative condenser 2；
Water-cooling type precool heat exchanger device 9, be set between the compressor 1 and the evaporative condenser 2 and with the wind
Cold mould precool heat exchanger device 8 is connected in parallel.
The present invention solves following technical problem：Cooling unit applicability in the environment of high temperature and humidity of vaporation-type is poor,
High temperature low humidity efficiency is poor and heat exchanger surface fouling is than more serious, the problem of user's body-sensing difference of initiation.
By between the compressor and the evaporative condenser and in parallel with the Wind-cooling type precool heat exchanger device
The water-cooling type precool heat exchanger device that mode is arranged, can the air-cooled mode being singly pre-chilled compared with the existing technology, increase water pre-cooling
Mode, since the power consumption that is pre-chilled relative to wind of mode of water pre-cooling is smaller, while carrying out slowing down fouling to unit,
Also effectively improve the efficiency of unit；Simultaneously because wind pre-cooling is worked at the same time with water pre-cooling to carry out cooling effect to refrigerant,
Increase heat exchange area, further decrease the refrigerant temperature into evaporative condenser, to reduce evaporative condenser heat exchange consumption
Function improves complete machine efficiency, improves the exchange capability of heat of unit；
In high temperature low humidity, condenser refrigerant is pre-chilled by the water at low temperature in water tank, is reduced cold in condenser
Matchmaker's temperature is reduced since under the high temperature low moisture environments such as drying regime, power caused by general Wind-cooling type pre-cooler is higher, complete machine
Air-cooled cold as the evaporation being pre-chilled, the lower situation of efficiency is only used only in the poor situation of performance；It is reduced in condenser simultaneously
Refrigerant temperature afterwards means that the evaporated quantity of water on evaporative condenser surface is reduced, and scaling rate reduces, and increase slows down fouling energy
Power；
In high temperature and humidity, in the pre-cooling of water pre-cooling double-tube heat exchanger, parallel connection increases by a routing condenser
Finned heat exchanger is pre-chilled in import cold wind, works along both lines and further decreases refrigerant temperature in condenser, reduces high temperature and humidity
The heat exchange of high load capacity condenser caused by environment is insufficient, promotes the refrigerating capacity of complete machine.Reduce due to rainy weather, wet environment
Under, i.e. the heat exchange decline of evaporative condenser caused by envionmental humidity excessively high (high humidity), the situation of unit refrigeration duty deficiency.
Refrigerant temperature after reducing in condenser simultaneously means that the evaporated quantity of water on evaporative condenser surface is reduced, scaling rate drop
Low, increase slows down fouling ability；
Vaporation-type water cooler of the invention efficiently solves under full working scope (high temperature and humidity, high temperature low humidity), maximum limit
The refrigerant of evaporative condenser is pre-chilled in degree, reduces condensation temperature, reduces due to its heat exchange pipe surface water evaporation and produces
Raw scale.
Preferably, the water-cooling type precool heat exchanger device 9 includes cooling water cycle water case 91 and is set in the water tank 91
Double-tube heat exchanger 92, refrigerant flows in described sleeve pipe heat exchanger 92.Pass through cooling water cycle water case and double-tube heat exchanger phase
In conjunction with structure type, enable to refrigerant when being flowed in the double-tube heat exchanger in water tank by the water in water tank to cooling, from
And the temperature of refrigerant is reduced, it realizes effect and effect to refrigerant precooling, is lowered into the temperature of refrigerant in evaporative condenser,
To reduce the evaporation capacity of refrigerant within the condenser, the yield of scale is reduced, and compared to the form of wind pre-cooling, this tool
The water pre-cooling form of body can be improved the efficiency of system, reduce energy consumption.
Preferably, 20 phase of water inlet pipe of the outlet pipe 91a of the cooling water cycle water case 91 and the evaporative condenser 2
Connection.Through this structure form the water after being heated in water tank by refrigerant can be directed into evaporative condenser, with
It is evaporated in condenser, to improve the temperature into water in evaporative condenser, is conducive to the evaporation of water, improves and change
Thermal effect, and sufficient utilization has been carried out to water, has improved cycle efficieny.
Preferably, water pump 5 is additionally provided between the cooling water cycle water case 91 and the evaporative condenser 2.Pass through
Water pump is set in above-mentioned position, water can be entered in evaporative condenser after being heated in water tank and the power of operation is provided,
Guarantee water circulates process.
Preferably, the evaporative condenser 2 includes vaporation-type refrigerant heat exchanger tube 7, spray system 21, wherein it is described enter water
Pipe 20 is connected with the spray system 21.By refrigerant heat exchanger tube make refrigerant flowed in refrigerant heat exchanger tube and with the water outside pipe
Exchange heat, spray system can effectively by water by sprinkling by way of with refrigerant heat exchanger tube contact and and refrigerant
Exchanged heat, improve heat transfer effect, and spray system be connected with water inlet pipe, can be effectively by quilt in cooling water cycle water case
Water after heating is introduced in spray system, improves the efficiency of heat exchange, improves recycling for water.
Preferably, the evaporative condenser 2 further includes being arranged in and 7 corresponding position of vaporation-type refrigerant heat exchanger tube
Blower 6.The heat transfer effect of evaporative condenser can effectively be reinforced by the way that blower is arranged in refrigerant heat exchanger tube corresponding position.It is excellent
It is selected as axial flow blower.
Preferably, control valve 12 is additionally provided in the parallel branch where the Wind-cooling type precool heat exchanger device 8.(preferably
Solenoid valve) it is controlled to adjust by the opening and closing that control valve is capable of Wind-cooling type precool heat exchanger device to the branch road, it can basis
The needs selection of actual condition opens or closes the Wind-cooling type precool heat exchanger device, plays the role of intelligent control.
Preferably, pressure sensor 11 is additionally provided on the gas exhaust piping of the compressor 1.By being set in above-mentioned position
The condensing pressure of condenser can be detected by setting pressure sensor, when outdoor environment is high temperature and humidity operating condition, cooling water
It is difficult to be evaporated, refrigerant is caused to be difficult to exchange heat, heat exchange efficiency reduces, so that the pressure detected is higher, on the contrary
Ground, when outdoor environment is high temperature low humidity operating condition, cooling water is easier to be evaporated, refrigerant is caused to be easier to exchange heat, heat exchange effect
Rate improves, so that the pressure detected is relatively low, therefore just can obtain outdoor environment operating condition indirectly by detecting pressure
Operating condition value, for unit realize intelligent control condition is provided.
Preferably, the Wind-cooling type precool heat exchanger device 8 is finned heat exchanger.This is Wind-cooling type precool heat exchanger of the invention
The preferred constructive form of device.
System operation is summarized：
Refrigerant flow increases the cold water cooler of evaporation of a bypass flow path in parallel after improvement, and refrigerant flow is as follows：
Refrigerant flow is pre-chilled in wind：2 → electric expansion valve of compressor 1 → Wind-cooling type precool heat exchanger 8 → evaporative condenser of device 3
→ shell-tube evaporator 4；
Refrigerant flow is pre-chilled in water：2 → electric expansion valve of compressor 1 → water-cooling type precool heat exchanger 9 → evaporative condenser of device 3
→ shell-tube evaporator 4.
Change unit operation logic after machine：
Under high temperature low humidity operating condition, refrigerant flow is that refrigerant flow is pre-chilled in water；This environment is in running on the lower load, vaporation-type
Refrigerant in train condenser is condensed to be condensed by the cooling of water-cooling type precool heat exchanger device 9 using evaporative condenser 2, it can be with
Meet the efficient operation of unit.
Under high temperature and humidity operating condition, refrigerant flow is water pre-cooling and wind pre-cooling parallel flow paths；This environment is in high load capacity work
Condition, after water precool heat exchanger device is pre-chilled, circulating water temperature increases refrigerant, leads to that forecooler temperature can not be effectively reduced.Cause
, according to the decision condition of condenser pressure value P value, the control valve 12 preset on 8 flow path of Wind-cooling type precool heat exchanger device is opened, cold for this
Matchmaker's flow path is simultaneously via after Wind-cooling type precool heat exchanger device 8 and water-cooling type precool heat exchanger device 9, hence into evaporative condenser 2,
It can achieve reduction condensation temperature, reduce the scale on 7 surface of vaporation-type refrigerant heat exchanger tube；For another angle, it is equivalent to
Under high temperature and humidity high load capacity operating condition, the condensing mode of unit is the combination of transpiration-cooled+water-cooled+air-cooled, water cooling
Type precool heat exchanger device 9 and Wind-cooling type precool heat exchanger device 8 undertake a part heat exchange load, the heat exchange amount of evaporative condenser 2 respectively
It reduces, further increases heat exchange amount, improving energy efficiency.
The present invention also provides a kind of control methods of vaporation-type water cooler, use vaporation-type water cooler above-mentioned,
According to the different operating conditions of outdoor temperature and humidity, the switching control that evaporative condenser 2 is pre-chilled is adjusted.
The present invention solves following technical problem：Cooling unit applicability in the environment of high temperature and humidity of vaporation-type is poor,
High temperature low humidity efficiency is poor and heat exchanger surface fouling is than more serious, the problem of user's body-sensing difference of initiation.
By between the compressor and the evaporative condenser and in parallel with the Wind-cooling type precool heat exchanger device
The water-cooling type precool heat exchanger device that mode is arranged, can the air-cooled mode being singly pre-chilled compared with the existing technology, increase water pre-cooling
Mode, since the power consumption that is pre-chilled relative to wind of mode of water pre-cooling is smaller, while carrying out slowing down fouling to unit,
Also effectively improve the efficiency of unit；Simultaneously because wind pre-cooling is worked at the same time with water pre-cooling to carry out cooling effect to refrigerant,
The cooling exothermal efficiency for also effectively improving refrigerant, improves the exchange capability of heat of unit；
In high temperature low humidity, condenser refrigerant is pre-chilled by the water at low temperature in water tank, is reduced cold in condenser
Matchmaker's temperature is reduced since under the high temperature low moisture environments such as drying regime, power caused by general Wind-cooling type pre-cooler is higher, complete machine
Air-cooled cold as the evaporation being pre-chilled, the lower situation of efficiency is only used only in the poor situation of performance；It is reduced in condenser simultaneously
Refrigerant temperature afterwards means that the evaporated quantity of water on evaporative condenser surface is reduced, and scaling rate reduces, and increase slows down fouling energy
Power；
In high temperature and humidity, in the pre-cooling of water pre-cooling double-tube heat exchanger, parallel connection increases by a routing condenser
Finned heat exchanger is pre-chilled in import cold wind, works along both lines and further decreases refrigerant temperature in condenser, reduces high temperature and humidity
The heat exchange of high load capacity condenser caused by environment is insufficient, promotes the refrigerating capacity of complete machine.Reduce due to rainy weather, wet environment
Under, i.e. the heat exchange decline of evaporative condenser caused by envionmental humidity excessively high (high humidity), the situation of unit refrigeration duty deficiency.
Refrigerant temperature after reducing in condenser simultaneously means that the evaporated quantity of water on evaporative condenser surface is reduced, scaling rate drop
Low, increase slows down fouling ability；
Vaporation-type water chilling unit control method of the invention efficiently solves full working scope (high temperature and humidity, high temperature low humidity)
Under, the refrigerant of evaporative condenser is pre-chilled to greatest extent, reduces condensation temperature, is reduced due to its pipe surface water that exchanges heat
The scale of evaporation and generation.
Preferably, when including pressure sensor 11 and control valve 12：
As pressure P≤P1 that pressure sensor 11 detects, judge then to close control valve at this time as high temperature low humidity operating condition
12, so that refrigerant only passes through the water-cooling type precool heat exchanger device and flows to the evaporative condenser 2；
As the pressure P that pressure sensor 11 detects>When P1, judge then to open control valve 12 at this time as high temperature and humidity operating condition,
So that refrigerant passes through the water-cooling type precool heat exchanger device 9 respectively and Wind-cooling type precool heat exchanger device 8 flows to the evaporative condenser
2；
Wherein the P1 is that refrigerant operating condition changes preset pressure value.
This is the condensing pressure value that basis of the invention detects and judges outdoor operating condition and further control to adjust refrigerant
It is individually by being pre-chilled in water-cooling type precool heat exchanger device or by being pre-chilled in Wind-cooling type precool heat exchanger device or simultaneously by two
Precool heat exchanger is carried out in a precool heat exchanger device, to reach raising system energy efficiency, heat exchange efficiency is improved and improves and slow down fouling ability
Effect.
According to the 11 collected P value of institute of condenser pressure sensor, adjusts and controlled in 8 place branch of Wind-cooling type precool heat exchanger device
The opening and closing of valve 12 processed adjusts the trend of refrigerant flow, the operation of high energy efficiency and slows down scaling rate under effective guarantee full working scope.
If when P≤P1, it is at this time high temperature low humidity operating condition that control valve 12, which closes (preferably solenoid valve),.Refrigerant flow trend：Pressure
3 → shell-tube evaporator of contracting machine 1 → water-cooling type precool heat exchanger device 9 → evaporative condenser, 2 → electric expansion valve 4；Work as outdoor environment
When for high temperature low humidity operating condition, cooling water is easier to be evaporated, refrigerant is caused to be easier to exchange heat, and heat exchange efficiency improves, thus cold
Matchmaker's pressure reduction makes the pressure detected relatively low, to can judge room at this time indirectly by the pressure value P detected
Outer operating condition is high temperature low humidity operating condition；
If P > P1, control valve 12 opens (preferably solenoid valve).It is at this time high temperature and humidity operating condition, refrigerant flow trend：Compression
9/ Wind-cooling type precool heat exchanger device 8 → evaporative condenser, 2 → electric expansion valve, 3 → package of machine 1 → water-cooling type precool heat exchanger device steams
Send out device 4.When outdoor environment is high temperature and humidity operating condition, cooling water is difficult to be evaporated, refrigerant is caused to be difficult to exchange heat, heat exchange
Efficiency reduces, so that refrigerant pressure reduces seldom, makes the pressure detected higher, to pass through the pressure value P detected
It can judge that outdoor operating condition is high temperature and humidity operating condition at this time indirectly.
Remarks：P is refrigerant pressure in condenser, and P1 value is according to the refrigerant that different refrigerant setting value difference are such as used
When R22 refrigerant, P1=1390Kpa；When such as the refrigerant that uses being R134a refrigerant, P1=910Kpa.The numerical values recited of P1 is root
It is resulting according to a large amount of experimental result and empirical value.
By the description of the control process to refrigerant flow path, being set and controlled for the unit can be in high temperature and humidity, height
Under the full working scopes environment such as warm low humidity, increase the heat exchange amount of unit, improve unit efficiency and Integrated part-load value, reduces
Scaling rate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.With
It is only the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection scope of invention.
Claims (7)
1. a kind of control method of vaporation-type water cooler, it is characterised in that：The vaporation-type water cooler includes：
Compressor (1) and evaporative condenser (2)；
Wind-cooling type precool heat exchanger device (8) is set between the compressor (1) and the evaporative condenser (2)；
Water-cooling type precool heat exchanger device (9), be set between the compressor (1) and the evaporative condenser (2) and with it is described
Wind-cooling type precool heat exchanger device (8) is connected in parallel；
Control valve (12) are additionally provided in parallel branch where the Wind-cooling type precool heat exchanger device (8), in the compressor (1)
Gas exhaust piping on be additionally provided with pressure sensor (11)；
According to the different operating conditions of outdoor temperature and humidity, the switching control that evaporative condenser (2) is pre-chilled is adjusted；
As the pressure P≤P1 of pressure sensor (11) detection, judge then to close control valve at this time as high temperature low humidity operating condition
(12), so that refrigerant only passes through the water-cooling type precool heat exchanger device and flows to the evaporative condenser (2)；
As the pressure P of pressure sensor (11) detection>When P1, judge then to open control valve (12) at this time as high temperature and humidity operating condition,
So that refrigerant pass through the water-cooling type precool heat exchanger device (9) respectively and Wind-cooling type precool heat exchanger device (8) to flow to the vaporation-type cold
Condenser (2)；Wherein the P1 is that refrigerant operating condition changes preset pressure value.
2. the control method of vaporation-type water cooler according to claim 1, it is characterised in that：The water-cooling type pre-cooling is changed
Hot device (9) includes cooling water cycle water case (91) and the double-tube heat exchanger (92) being set in the water tank (91), and refrigerant is in institute
State flowing in double-tube heat exchanger (92).
3. the control method of vaporation-type water cooler according to claim 2, it is characterised in that：The cooling water cycle water
The outlet pipe (91a) of case (91) is connected with the water inlet pipe (20) of the evaporative condenser (2).
4. the control method of vaporation-type water cooler according to claim 2, it is characterised in that：The cooling water cycle water
Water pump (5) are additionally provided between case (91) and the evaporative condenser (2).
5. the control method of vaporation-type water cooler according to claim 3, it is characterised in that：The evaporative condenser
It (2) include vaporation-type refrigerant heat exchanger tube (7), spray system (21), wherein the water inlet pipe (20) and the spray system (21)
It is connected.
6. the control method of vaporation-type water cooler according to claim 5, it is characterised in that：The evaporative condenser
It (2) further include being arranged in the blower (6) with vaporation-type refrigerant heat exchanger tube (7) corresponding position.
7. the control method of vaporation-type water cooler according to claim 1, it is characterised in that：The Wind-cooling type pre-cooling is changed
Hot device (8) is finned heat exchanger.
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|---|---|---|---|---|
| CN108954719A (en) * | 2018-08-10 | 2018-12-07 | 天津六百光年智能科技有限公司 | Optimal control method and control system based on cooling water heat exchange system |
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