CN111706946B - An evaporative cooling precision air conditioner - Google Patents
An evaporative cooling precision air conditionerInfo
- Publication number
- CN111706946B CN111706946B CN202010709833.0A CN202010709833A CN111706946B CN 111706946 B CN111706946 B CN 111706946B CN 202010709833 A CN202010709833 A CN 202010709833A CN 111706946 B CN111706946 B CN 111706946B
- Authority
- CN
- China
- Prior art keywords
- condensing
- heat exchange
- evaporative
- air
- exchange coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F5/0035—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 using evaporation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
本发明涉及一种蒸发冷却精密空调，其包括室内空调单元和蒸发式冷凝外机单元，室内空调单元包括压缩机、蒸发换热盘管、第一止回阀，外机单元包括氟泵、蒸发式冷凝换热盘管、第二止回阀，压缩机一端通过管道与蒸发换热盘管一端连接，蒸发换热盘管另一端与氟泵一端连接，氟泵另一端通过管道与蒸发式冷凝换热盘管的一端连接，蒸发式冷凝换热盘管的另一端通过管道与压缩机的另一端连接，第一止回阀与压缩机两端通过管道并联连接，第二止回阀与氟泵两端通过管道并联连接。其在室外温度大于等于设定温度时为压缩机模式，在室外温度小于设定温度时为氟泵模式，通过智能切换工作模式，使其在满足夏季高温制冷需求的同时，能效更高，节能降耗明显。
This invention relates to an evaporative cooling precision air conditioner, comprising an indoor air conditioning unit and an evaporative condensing outdoor unit. The indoor air conditioning unit includes a compressor, an evaporative heat exchange coil, and a first check valve. The outdoor unit includes a refrigerant pump, an evaporative condensing heat exchange coil, and a second check valve. One end of the compressor is connected to one end of the evaporative heat exchange coil via a pipe, and the other end of the evaporative heat exchange coil is connected to one end of the refrigerant pump via a pipe. The other end of the refrigerant pump is connected to one end of the evaporative condensing heat exchange coil via a pipe, and the other end of the evaporative condensing heat exchange coil is connected to the other end of the compressor via a pipe. The first check valve is connected in parallel to both ends of the compressor via pipes, and the second check valve is connected in parallel to both ends of the refrigerant pump via pipes. The system operates in compressor mode when the outdoor temperature is greater than or equal to the set temperature, and in refrigerant pump mode when the outdoor temperature is less than the set temperature. Through intelligent switching of operating modes, it can meet the high-temperature cooling needs of summer while achieving higher energy efficiency and significant energy savings.
Description
Technical Field
The invention relates to the technical field of air conditioning refrigeration, in particular to a water evaporation cooling type precise air conditioner for a data center.
Background
Precision air conditioning has been developed for decades, and the technology in all aspects tends to be mature. The temperature and humidity sensor is convenient to use, simple to operate and high in reliability, and is widely applied to middle and small data centers or occasions with high requirements on temperature and humidity. The existing precise air conditioner mainly adopts a compressor for mechanical refrigeration, so as to save energy, increase load in high-temperature climates and reduce load in non-high-temperature climates, and the cooling requirement of the data center is matched through compressor variable frequency control.
With the progress of technology, research and development of an evaporative condenser are receiving more and more attention, and the energy efficiency of the system can be greatly improved by reducing the condensation temperature through evaporative cooling.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an evaporative cooling precision air conditioner, an evaporative condensing external unit of which can be switched to a working mode according to outdoor environment temperature, and is switched to a compressor refrigerating mode when the outdoor temperature is more than or equal to a set natural cooling temperature, and is switched to a fluorine pump running mode when the outdoor temperature is less than the set natural cooling temperature, and the system is mainly cooled by evaporative cooling in the fluorine pump running mode, so that the energy consumption can be greatly reduced, and meanwhile, the condensing temperature can be greatly reduced to about 30 ℃ due to an evaporative cooling condensing mode in the compressor refrigerating mode in summer, so that the energy efficiency of the system is greatly improved, and the energy conservation and the consumption reduction are obvious.
The invention also carries out precooling and cooling on natural wind entering the evaporative condensing external unit, the temperature of the cooled air wet bulb is reduced, the temperature after re-humidification is close to the ambient dew point temperature, meanwhile, air and cold water which are close to the ambient dew point temperature are obtained, the outside air is cooled by the cold water which is close to the ambient dew point temperature, the temperature of the air entering the system, the temperature of the humidified air and the circulating water are continuously reduced, the surface evaporative cooling temperature of the evaporative condensing heat exchange coil is reduced, the condensing temperature of the refrigerant in the evaporative condensing heat exchange coil is reduced, the energy efficiency of the system is improved, and the time for using natural cold sources all year round is prolonged.
The technical scheme of the embodiment of the invention is as follows:
an evaporative cooling precision air conditioner comprises an indoor air conditioning unit for cooling heat source side air and an evaporative condensing external unit;
The indoor air conditioner unit comprises an air conditioner shell, an air conditioner air inlet, a compressor, a first check valve, an evaporation heat exchange coil, a throttle valve, an air conditioner fan, an air conditioner air outlet, a temperature and humidity sensor, a controller, an inner refrigerant outlet, an inner refrigerant inlet and the like, wherein the evaporation heat exchange coil is connected with the compressor and the throttle valve through pipelines, and the first check valve is connected with the compressor in parallel through front and rear pipelines;
The evaporative condensing external unit comprises a condensing external shell, a fluorine pump, a second check valve, an evaporative condensing heat exchange coil, a condensing fan, an external air inlet, a spraying module, a filler, a surface cooler, an external air outlet, a water collecting disc, a circulating water pump, a water storage tank, a water supplementing device, a condensing external refrigerant inlet, a condensing external refrigerant outlet and the like, wherein the fluorine pump is connected with the evaporative condensing heat exchange coil through a pipeline, and the second check valve is connected with two ends of the fluorine pump in parallel through pipelines; the outdoor unit air outlet is positioned at the top of the condensing outdoor unit shell, the outdoor unit air inlet is arranged on the side surface of the lower part of the condensing outdoor unit shell, the condensing fan is arranged on the outdoor unit air outlet, the spraying module and the evaporating type condensing heat exchange coil are arranged below the condensing fan, the filler is arranged below the evaporating type condensing heat exchange coil, the surface air cooler is arranged below the filler, the outdoor unit air inlet is positioned at the side of the surface air cooler, the water collecting disc is arranged below the filler, the water collecting disc is connected with the water storage tank, the water inlet of the circulating water pump is connected with the water storage tank through a pipeline, the water outlet of the circulating water pump is connected with the water inlet of the surface air cooler through a pipeline, the water outlet of the surface air cooler is connected with the spraying module through a pipeline, the spraying module is composed of a plurality of spray heads, the surface air cooler is faced to the evaporating type condensing heat exchange coil, and the water supplementing device is connected with the water storage tank through a pipeline;
The indoor air conditioning unit is connected with the evaporative condensing external unit through a pipeline, the refrigerant outlet of the internal unit is connected with the refrigerant inlet of the condensing external unit through a pipeline, and the refrigerant inlet of the internal unit is connected with the fluorine pump through a pipeline.
The evaporative condensing heat exchange coil is a radial finned tube heat exchanger, the evaporative condensing heat exchange coil is arranged in a V shape or an inverted V shape, fins on the evaporative condensing heat exchange coil are uniformly distributed, the air circulation space inside the evaporative condensing heat exchange coil is completely covered and uniformly divided, the air circulation space is corrugated along the air flow direction or staggered along the air flow direction, and the flow direction of cooled fluid is arranged in a countercurrent manner between the layers of the evaporative condensing heat exchange coil relative to the air flow direction.
Preferably, the evaporative condensing external unit is further provided with an automatic filtering and sewage draining device, and the automatic filtering and sewage draining device is arranged between the circulating water pump and the surface cooler.
Preferably, the evaporative condensing external unit is further provided with an air inlet temperature and humidity sensor, an air outlet temperature sensor, a condensing pressure sensor and a control module, and the control module can automatically adjust the load of the condensing fan and the load of the circulating water pump according to the outlet water temperature and a preset temperature target value so that the condensing temperature and the condensing pressure reach the preset target value.
Preferably, the surface of the evaporative condensing heat exchange coil is provided with a hydrophilic coating to which an infrared radiation heat dissipating material is added.
Preferably, the surface of the surface cooler is provided with a super-hydrophobic coating added with an infrared radiation radiating material.
Preferably, the average particle size of water drops sprayed by the spraying module is smaller than 1mm.
Preferably, the surface cooler is a fin type heat exchanger.
Preferably, the evaporation heat exchange coil is a fin type heat exchange coil.
Preferably, the evaporative condensing external unit further comprises an air filter screen, and the air filter screen is installed at the air inlet of the external unit.
Preferably, the evaporative condensing heat exchange coil is disposed at an incline of X degrees from the horizontal, and the packing is disposed at an incline of 180-X degrees from the horizontal.
Preferably, the surface cooler is obliquely arranged at 180-X degrees from the horizontal direction, and the length from the upper end to the lower end of the air inlet of the external machine is longer than the vertical length from the upper end to the lower end of the surface cooler.
Preferably, the evaporation heat exchange coil is obliquely arranged at an angle of X degrees to the horizontal direction.
Compared with the prior art, the invention has the beneficial effects that:
Through setting up the compressor, with the parallelly connected first check valve of compressor, through setting up the fluorine pump, with the parallelly connected second check valve of fluorine pump, form the duplex mode, it can carry out operating mode switching according to outdoor ambient temperature, be compressor refrigeration mode when outdoor temperature is greater than or equal to the settlement temperature, when outdoor temperature is less than the settlement temperature, switch into the fluorine pump mode of operation, through intelligent switching operating mode, make it when satisfying summer high temperature refrigeration demand, the efficiency is higher, energy saving and consumption reduction are obvious.
The surface cooler is arranged at the air inlet of the outer machine of the evaporative condensing outer machine unit to pre-cool natural wind entering the evaporative condensing outer machine unit, and cooled cold air carries out convection evaporation cooling on spray water in the filler, so that the spray water is cooled to cold water with the temperature close to the ambient dew point temperature and flows into the water storage tank, water in the water storage tank is sprayed out through the spraying module after pre-cooling the air, the evaporative condensing effect of the evaporative condensing heat exchange coil is improved, and the operation energy consumption of the whole air conditioning system is reduced.
Drawings
FIG. 1 is a schematic view of an evaporative cooling air conditioner according to the present invention;
FIG. 2 is a schematic diagram of an evaporative condensing heat exchange coil in accordance with the present invention;
10. The outdoor unit comprises a condensing outdoor unit shell, 100 parts of an evaporative condensing outdoor unit, 101 parts of an outdoor unit air outlet, 102 parts of an outdoor unit air inlet, 130 parts of a coil, 140 parts of a fin, 131 parts of a liquid guide part, 132 parts of a connecting part, 11 parts of a spraying module, 12 parts of a filler, 13 parts of a surface cooler, 14 parts of a circulating water pump, 15 parts of a water storage tank, 16 parts of a water collecting disc, 17 parts of an evaporative condensing heat exchange coil, 18 parts of a condensing fan, 200 parts of an indoor air conditioner unit, 21 parts of an evaporating heat exchange coil, 22 parts of an air conditioner fan, 23 parts of a fluorine pump, 24 parts of a second check valve, 25 parts of a first check valve, 26 parts of a compressor, 27 parts of an air conditioner shell, 28 parts of a throttle valve.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1, fig. 1 is a schematic diagram of an evaporative cooling precision air conditioner according to the present invention, which includes an indoor air conditioning unit 200 for providing cooling capacity to cool air at a heat source side and an evaporative condensing external unit 100 for releasing heat to an external environment, the indoor air conditioning unit is located indoors, such as a data center room, the indoor air conditioning unit cools indoor hot air, the evaporative condensing external unit is located outdoors, such as outside the data center room, and the evaporative condensing external unit cools a heat source medium after heat exchange of an original heat source medium in the indoor air conditioning unit.
The evaporative cooling precise air conditioner is mainly applied to a data center machine room, the structural design of an indoor air conditioner unit generally adopts upper air inlet and lower air supply, specifically, the indoor air conditioner unit 200 comprises an air conditioner shell 27, an air conditioner air inlet, a compressor 26, a first check valve 25, an evaporative heat exchange coil 21, a throttle valve 28, an air conditioner fan 22, an air conditioner air outlet, a temperature and humidity sensor, a controller, an inner refrigerant outlet, an inner refrigerant inlet and the like, the tube of the evaporative heat exchange coil 21 is connected with the compressor 26 and the throttle valve 28 through pipelines, the first check valve 25 is connected with the compressor 26 in parallel through front and rear pipelines, the air conditioner fan 22 is positioned at the lower part of the air conditioner shell 27, the upper part of the air conditioner shell is an air inlet end, and the side surface of the lower part of the air conditioner shell is an air supply end. Specifically, the evaporative condensing external unit 100 comprises a condensing external shell 10, a fluorine pump 23, a second check valve 24, an evaporative condensing heat exchange coil 17, a condensing fan 18, an external air inlet 101, a spray module 11, a filler 12, a surface cooler 13, an external air outlet 102, a water collecting tray 16, a circulating water pump 14, a water storage tank 15, a water supplementing device, a condensing external refrigerant inlet, a condensing external refrigerant outlet and the like, wherein the fluorine pump is connected with the evaporative condensing heat exchange coil through a pipeline, the second check valve is connected with two ends of the fluorine pump through pipelines in parallel, the indoor air conditioning unit is connected with the evaporative condensing external unit through a pipeline, and an internal refrigerant outlet is connected with the condensing external refrigerant inlet through a pipeline, and is connected with the fluorine pump through a pipeline.
Specifically, spray the module and connect by a plurality of shower nozzles and pipeline and constitute, the shower nozzle evenly sets up and aim at evaporative condensing heat exchange coil, and the average particle diameter of the drop of water that the shower nozzle spouted is less than 1mm preferably. The spray head is preferably a solid conical spray nozzle, and the spray head and the water pressure are optimized, so that spray water is uniformly sprayed on the evaporative cooling heat exchanger in the form of small liquid drops with the particle size smaller than 1mm (a process with the average particle size of 0.5mm is preferred), and the spray head is not traditional water columnar spray or traditional atomization spray, the spray head and the water pressure are optimized, the spray water is uniformly distributed on the surface of the evaporative condensing heat exchange coil, the spray water is obviously distributed in the air flow direction, the spray water temperature above the evaporative condensing heat exchange coil evaporative cooling heat exchanger is high, and the spray water temperature below the evaporative condensing heat exchange coil is low. Experiments show that when the particle size of spray water is smaller than 0.5mm, most of spray particles are easily blown away by wind, and when the particle size of spray water is larger than 1mm, spray water is unevenly distributed, and meanwhile, the evaporation rate is reduced due to the reduction of the total surface area of spray water balls.
Preferably, the evaporative condensing external unit is further provided with an air inlet temperature and humidity sensor, an air outlet temperature sensor, a condensing pressure sensor and a control module, and the control module can automatically adjust the load of the condensing fan and the load of the circulating water pump according to the outlet temperature and a preset temperature target value so that the condensing temperature and the condensing pressure reach the preset target value.
For a specific cold source system of the whole evaporative cooling precise air conditioner, a compressor, an evaporative heat exchange coil, a fluorine pump, an evaporative condensing heat exchange coil, a first check valve, a second check valve and a throttle valve are arranged in a double-mode cold source switching circulation system. The method comprises the steps of switching a current working mode by controlling the opening and closing of a first check valve, a compressor, a second check valve and a fluorine pump, specifically controlling the opening and closing of the first check valve, the closing of the compressor, the closing of the second check valve and the opening of the fluorine pump, entering a fluorine pump operation mode, driving a refrigerant medium to circularly flow in an evaporation type condensation heat exchange coil and an evaporation type heat exchange coil by the fluorine pump, enabling the refrigerant medium to exchange heat with indoor hot air in the evaporation type heat exchange coil, enabling the refrigerant medium with the temperature rising after heat exchange to flow into the evaporation type condensation heat exchange coil, enabling the evaporation type condensation heat exchange coil to exchange heat with outdoor cold air, enabling the temperature falling after heat exchange, enabling the first check valve to be closed, the compressor to be opened, enabling the second check valve to be closed, enabling the fluorine pump to enter the compressor operation mode, enabling the compressor to compress the refrigerant medium to be conveyed into the evaporation type condensation heat exchange coil like a common air conditioner, enabling the refrigerant medium to absorb heat and then be conveyed into the evaporation type condensation heat exchange coil, and enabling the outdoor cold air to cool down. The opening and closing of the first check valve, the compressor, the second check valve and the fluorine pump are controlled by the controller according to the detected outdoor environment temperature, when the outdoor temperature is greater than or equal to a set value, such as 31 ℃, the compressor operation mode is entered, when the outdoor temperature is smaller than the set value, the fluorine pump operation mode is entered, the intelligent switching is performed through the double operation modes, the compressor operation mode is opened at high temperature in summer, the indoor temperature can reach the refrigeration requirement value, and when the temperature is in other seasons, the fluorine pump operation mode is opened, the power consumption of the fluorine pump is lower relative to the compressor, and the power consumption of an air conditioning system is lower.
In the power consumption of the whole air conditioning system, the cooling efficiency of the evaporative condensing heat exchange coil is particularly important, and in general, the evaporative condensing heat exchange coil is cooled by air cooling and water cooling, the air cooling is determined by the external environment temperature, the lower the environment temperature is, the better the effect is, but the climate is uncontrollable, and the water cooling is carried out, so that the evaporative condensing heat exchange coil is cooled by water cooling, and the dew point type indirect evaporative water cooling mode is adopted.
For the internal structure of the evaporative condensing external machine unit, specifically, an external machine air outlet is positioned at the top of a condensing external machine shell, an external machine air inlet is arranged on the side surface of the lower part of the condensing external machine shell, a condensing fan is arranged on the external machine air outlet, a spraying module and an evaporative condensing heat exchange coil are arranged below the condensing fan, a filler is arranged below the evaporative condensing heat exchange coil, a surface cooler is arranged below the filler, the external machine air inlet is positioned at the side of the surface cooler, a water collecting disc is arranged below the filler, a water storage tank is connected below the water collecting disc, a water inlet of a circulating water pump is connected with the water storage tank through a pipeline, a water outlet of the circulating water pump is connected with a water inlet of the surface cooler through a pipeline, the water outlet of the surface cooler is connected with the spraying module through a plurality of spray heads, the spray module is used for spraying water to the evaporative condensing heat exchange coil, and a water supplementing device is connected with the water storage tank through a pipeline;
The condensing fan is started, external natural wind is sucked to enter from the air inlet of the external machine, and precooled through the surface cooler to be cooled into cold air; the circulating water pump is started, cold water is extracted from the water storage tank, precooled and cooled by external natural wind through the surface cooler, sprayed on the evaporative condensing heat exchange coil through a plurality of spray heads in the spraying module, flows into the filler after exchanging heat with the evaporative condensing heat exchange coil, the precooled cold air reaches the filler and flows into the spray water in the filler, an isenthalpic process occurs, the spray water is evaporated and cooled to obtain spray water and cold air which are close to the dew point temperature, the spray water is stored in the water storage tank through the water collecting disc, the cold air flows out of the filler to cool and cool the evaporative condensing heat exchange coil secondarily, and finally the cold air is discharged through an air outlet of the external machine.
The practical experimental data are as follows, air with the external temperature of 35 ℃ and the relative humidity of 60% is precooled through a 28 ℃ surface cooler, the constant humidity cooling process is carried out, the air with the temperature of 31 ℃ and the relative humidity of 75% can be obtained at maximum through controlling the water speed and the air inlet quantity of the surface cooler, the air with the temperature of 31 ℃ enters the filler, the air enters the filler and carries out convection evaporation with a water curtain in the filler, the water curtain in the filler sprays the heat exchange coil through spray water, the spray water is conveyed to a spraying module through the surface cooler, the water with the temperature of 28 ℃ in the surface cooler is sprayed to the heat exchange coil with the temperature of 40 ℃ after the water is subjected to heat exchange with the air with the temperature of 35 ℃, and the spray water with the temperature of 29 ℃ is changed into the water with the temperature of 35.5 ℃ after the water is fully subjected to heat exchange, and flows into the filler from the heat exchange coil. The temperature of the precooled air is 31 ℃, the relative humidity of the air is 75% and the filler water curtain of 32.5 ℃ are subjected to convection evaporation, the air is humidified and cooled, the relative humidity is humidified to be more than 96% and is close to 100% by controlling the flow speed, the air inlet wind speed and the convection contact area of the water curtain, the temperature of the water curtain is close to the wet bulb temperature, the corresponding wet bulb temperature at the dry bulb temperature of 31 ℃ and the relative humidity of 75% is 27 ℃, the lowest temperature of the water curtain can be controlled to be 27 ℃, the filler water curtain is cooled and then falls into a water storage tank, the filler water curtain is cooled to 27 ℃, the air of 31 ℃ is humidified and cooled to be 30 ℃, the air of 100% of the relative humidity exchanges heat with spray water flowing on a heat exchange coil, the air temperature is increased to about 37 ℃, and RH85% is discharged through an air outlet of an external machine.
In contrast, the surface cooler is not arranged for precooling, namely when the air with the external temperature of 35 ℃ and the relative humidity of 60% directly enters the equipment, the condensing temperature of the heat exchange coil pipe can rise to 41 ℃, the air temperature of an air outlet of the external machine can rise to about 38.5 ℃, and RH55% is discharged.
According to the comparison, after the air inlet of the external machine is provided with the surface cooler for precooling the air inlet, the air temperature is reduced, the humidity is increased, the corresponding wet bulb temperature is reduced, the air speed of the fan, the flow rate of filling water and the contact area of air and water are controlled, the water flowing out of the filling can be enabled to be close to the dew point temperature, the obtained raw water temperature is lower, and further a larger temperature difference is generated with the heat exchange coil, the larger temperature difference is, the larger heat taken away by spray water is, the better cooling effect on a refrigerant medium is achieved, and air conditioning cooling is enabled to be more energy-saving.
In order to increase the precooling contact area of the external air and the surface cooler and prolong the time, the effect of larger precooling temperature reduction temperature difference of the external air is achieved, and the surface cooler is preferably a fin type heat exchanger. The surface cooler surface is preferably provided with a superhydrophobic coating added with an infrared radiation heat dissipation material. In this embodiment, the coating contains a nano-polymer organosilicon component and contains transition metal oxides such as cobalt, nickel, manganese, etc. The heat exchange efficiency of the surface cooler can be improved by arranging the coating, and the cooling capacity of the evaporative condensing external unit is improved as a whole.
In order to increase the contact area of air and the evaporative heat exchange coil and increase the time, the heat exchange efficiency is improved, preferably, the evaporative heat exchange coil and the evaporative heat exchange coil are radial fin type heat exchange coils, the evaporative heat exchange coils are arranged in a V shape or an inverted V shape, fins on the evaporative heat exchange coils are uniformly distributed, the air circulation space inside the evaporative heat exchange coils is completely covered and uniformly divided, the air circulation space is corrugated along the air flow direction or staggered along the air flow direction, and the flow direction of the cooled fluid is arranged in a countercurrent manner between the layers of the evaporative heat exchange coils. As shown in fig. 2, the radial fin tube heat exchanger is composed of a coil 130 and fins 140, wherein the coil 130 is composed of a liquid guiding part 131 and a connecting part 132, and the liquid guiding parts connected in the vertical direction are connected in an S shape through the connecting part 132 to form a row of vertical coils, so that the cooled fluid in each row of vertical coils flows down from top to bottom, and the cooled fluid entering the radial fin tubes and the air integral layers entering the radial fin tubes are subjected to heat exchange in a countercurrent mode, and the heat exchange efficiency is high. Conventionally, the liquid guiding portion 131 and the connecting portion 132 of the coil are connected in an S-shape in the horizontal direction, resulting in heat exchange between the cooled fluid entering the radial finned tube and the air entering the radial finned tube in a cross flow manner, and low heat exchange efficiency.
The fins 140 of the radial fin tube heat exchanger of the present embodiment are corrugated in the direction of the air flow (not shown in the figure, and a person skilled in the art can infer corrugated fins from straight-sheet fins in fig. 2) or are staggered or corrugated staggered. The fins of the radial fin tube heat exchanger are corrugated along the air flow direction, so that the contact area between air and the fins is increased and the heat exchange efficiency is improved compared with the conventional straight-plate-shaped fins. The fins of the radial fin tube heat exchanger are staggered in the air flow direction, so that compared with the conventional arrangement, the air flow disturbance is increased, and the heat exchange efficiency is improved. In particular, when staggered, a row of fins may extend into the space between adjacent rows of fins, increasing the overall fin area and enhancing airflow turbulence, and increasing the heat exchange efficiency of the heat exchanger.
Preferably, a hydrophilic coating to which an infrared radiation heat dissipating material is added is provided on the surface of the radial fin tube heat exchanger. In this embodiment, the coating contains nano-silica or nano-alumina and contains transition metal oxides such as cobalt, nickel, manganese, etc. The heat exchange efficiency of the radial finned tube heat exchanger can be improved by the aid of the coating, water drops are better adsorbed to form a water film, the evaporation efficiency of spray water is improved, and the cooling capacity of the evaporative condensing external unit is improved as a whole.
In order to prevent natural air from entering the evaporative condensing external unit to pollute the internal environment, the evaporative condensing external unit preferably further comprises an air filter screen, and the air filter screen is arranged at the air inlet of the external unit.
Impurities can not appear in water, dirt is formed on the surface of the evaporative condensing heat exchange coil in the surface cooler easily for a long time, the surface cooler is blocked, the heat exchange efficiency of the evaporative condensing heat exchange coil is reduced, and in order to solve the problem, preferably, the evaporative condensing external unit further comprises an automatic filtering and sewage discharging device, the automatic filtering and sewage discharging device is arranged between the circulating water pump and the surface cooler, one end of the automatic filtering and sewage discharging device is connected with a water outlet of the circulating water pump, and the other end of the automatic filtering and sewage discharging device is connected with a water inlet of the surface cooler. The raw water is filtered before it enters the surface cooler.
In order to enable the evaporative condensing heat exchange coil and the filler to have larger contact surface area with air in the condensing outer machine shell with the fixed space, preferably, the evaporative condensing heat exchange coil is obliquely arranged at an angle of X degrees with the horizontal direction, the filler is obliquely arranged at an angle of 180-X degrees with the horizontal direction, the tail part of the lower end of the evaporative condensing heat exchange coil and the head part of the upper end of the filler are bordered at a smaller distance, and in the practical design, the inclination angle and the condensing outer machine shell space are determined, so that the evaporative condensing heat exchange coil and the filler with corresponding sizes can be designed.
In order to enable the cold air precooled by the surface cooler to flow into the filler more intensively, the surface cooler and the filler are arranged in parallel, preferably, the surface cooler is obliquely arranged at 180-X degrees with respect to the horizontal direction, and the length from the upper end to the lower end of the air inlet of the external machine is longer than the vertical length from the upper end to the lower end of the surface cooler. The length of the air inlet of the external machine is larger than the vertical length from the upper end to the lower end of the surface cooler, so that each part of the surface cooler can be used for pre-cooling the externally-entering air, and the larger pre-cooling air quantity can be achieved.
In the same way, the indoor air conditioner is generally greater in height than in width, and in order to obtain a larger heat exchange area, it is preferable that the evaporation heat exchange coil is disposed obliquely at an angle of X degrees from the horizontal.
According to the invention, the compressor and the first check valve connected in parallel with the compressor are arranged, and the fluorine pump and the second check valve connected in parallel with the fluorine pump are arranged, so that a double-working mode is formed, the working mode can be switched according to the outdoor environment temperature, the compressor is in a refrigerating mode when the outdoor temperature is more than or equal to the set temperature, the compressor is switched into a fluorine pump running mode when the outdoor temperature is less than the set temperature, and the working mode is switched intelligently, so that the energy efficiency is higher while the high-temperature refrigerating requirement in summer is met, and the energy conservation and the consumption reduction are obvious.
According to the invention, the surface cooler is arranged before external air enters the condensing outer machine shell to exchange heat with spray water in the filler, so that the temperature of the external air is reduced, the cooled air exchanges heat with the spray water in the filler to obtain spray water with lower water outlet temperature, the lower spray water increases the temperature difference between the cooled air and the evaporating type condensing heat exchange coil, the temperature of the medium in the evaporating type condensing heat exchange coil is further reduced, and the contact area between the air and the surface cooler, the filler and the evaporating type condensing heat exchange coil is increased by obliquely arranging the surface cooler, the filler and the evaporating type condensing heat exchange coil at an angle of X degrees with the horizontal direction, so that the heat exchange convection evaporation between the air and the surface cooler, the filler and the evaporating type condensing heat exchange coil is more sufficient.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. An evaporative cooling precision air conditioner, which is characterized in that:
The evaporative cooling precise air conditioner comprises an indoor air conditioner unit for cooling heat source side air and an evaporative condensing external unit;
The indoor air conditioner unit comprises an air conditioner shell, an air conditioner air inlet, a compressor, a first check valve, an evaporation heat exchange coil, a throttle valve, an air conditioner fan, an air conditioner air outlet, a temperature and humidity sensor, a controller, an inner refrigerant outlet and an inner refrigerant inlet, wherein the evaporation heat exchange coil is connected with the compressor and the throttle valve through pipelines, and the first check valve is connected with the compressor in parallel through front and rear pipelines;
The evaporative condensing external unit comprises a condensing external shell, a fluorine pump, a second check valve, an evaporative condensing heat exchange coil, a condensing fan, an external air inlet, a spraying module, a filler, a surface cooler, an external air outlet, a water collecting disc, a circulating water pump, a water storage tank, a water supplementing device, a condensing external refrigerant inlet and a condensing external refrigerant outlet, wherein the fluorine pump is connected with the evaporative condensing heat exchange coil through a pipeline, and the second check valve is connected with two ends of the fluorine pump in parallel through pipelines; the outdoor unit air outlet is positioned at the top of the condensing outdoor unit shell, the outdoor unit air inlet is arranged on the side surface of the lower part of the condensing outdoor unit shell, the condensing fan is arranged on the outdoor unit air outlet, the spraying module and the evaporating type condensing heat exchange coil are arranged below the condensing fan, the filler is arranged below the evaporating type condensing heat exchange coil, the surface air cooler is arranged below the filler, the outdoor unit air inlet is positioned at the side of the surface air cooler, the water collecting disc is arranged below the filler, the water collecting disc is connected with the water storage tank, the water inlet of the circulating water pump is connected with the water storage tank through a pipeline, the water outlet of the circulating water pump is connected with the water inlet of the surface air cooler through a pipeline, the water outlet of the surface air cooler is connected with the spraying module through a pipeline, the spraying module is composed of a plurality of spray heads, the surface air cooler is faced to the evaporating type condensing heat exchange coil, and the water supplementing device is connected with the water storage tank through a pipeline;
The indoor air conditioning unit is connected with the evaporative condensing external unit through a pipeline, the refrigerant outlet of the internal unit is connected with the refrigerant inlet of the condensing external unit through a pipeline, and the refrigerant inlet of the internal unit is connected with the fluorine pump through a pipeline;
the evaporative condensing external machine unit is further provided with an air inlet temperature and humidity sensor, an air outlet temperature sensor, a condensing pressure sensor and a control module, and the control module can automatically adjust the load of the condensing fan and the load of the circulating water pump according to the outlet temperature and a preset temperature target value so that the condensing temperature and the condensing pressure reach the preset target value.
2. The evaporative cooling precision air conditioner according to claim 1, wherein:
The evaporative condensing heat exchange coil is a radial finned tube heat exchanger, the evaporative condensing heat exchange coil is arranged in a V shape or an inverted V shape, fins on the evaporative condensing heat exchange coil are uniformly distributed, the air circulation space inside the evaporative condensing heat exchange coil is completely covered and uniformly divided, the air circulation space is corrugated along the airflow direction or is staggered along the airflow direction, and the flow direction of cooled fluid is arranged in a countercurrent mode between the layers of the evaporative condensing heat exchange coil relative to the airflow direction.
3. The evaporative cooling precision air conditioner according to claim 1, wherein:
The evaporation type condensing external machine unit is also provided with an automatic filtering and sewage draining device, and the automatic filtering and sewage draining device is arranged between the circulating water pump and the surface cooler.
4. The evaporative cooling precision air conditioner according to claim 1, wherein:
the surface of the evaporative condensing heat exchange coil is provided with a hydrophilic coating added with an infrared radiation heat dissipation material.
5. The evaporative cooling precision air conditioner according to claim 1, wherein:
the surface of the surface cooler is provided with a super-hydrophobic coating added with an infrared radiation radiating material.
6. The evaporative cooling precision air conditioner according to claim 1, wherein:
The average particle size of water drops sprayed by the spraying module is smaller than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010709833.0A CN111706946B (en) | 2020-07-22 | 2020-07-22 | An evaporative cooling precision air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010709833.0A CN111706946B (en) | 2020-07-22 | 2020-07-22 | An evaporative cooling precision air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111706946A CN111706946A (en) | 2020-09-25 |
| CN111706946B true CN111706946B (en) | 2026-04-28 |
Family
ID=72547276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010709833.0A Active CN111706946B (en) | 2020-07-22 | 2020-07-22 | An evaporative cooling precision air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111706946B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111023A (en) * | 2020-12-24 | 2022-03-01 | 四川贝园科技有限公司 | Refrigerating and heating double-effect heat exchanger with natural cooling function and control method thereof |
| CN112984661B (en) * | 2021-03-30 | 2022-12-30 | 中国石油集团东北炼化工程有限公司沈阳分公司 | Air cooler capable of resisting severe summer heat and severe cold weather |
| CN114543280B (en) * | 2022-02-16 | 2023-10-17 | 四川贝园科技有限公司 | Combined control method for speed of cooling water pump and fan of evaporative condenser |
| WO2024069864A1 (en) * | 2022-09-29 | 2024-04-04 | 日本電気株式会社 | Heat exchange device and heat exchange method |
| CN115560463B (en) * | 2022-10-21 | 2025-08-26 | 江苏泰恩特环境技术有限公司 | Exhaust heat recovery and fresh air pre-cooling and reheating heat recovery system |
| CN115654691B (en) * | 2022-10-31 | 2025-10-31 | 深圳市英维克科技股份有限公司 | Air conditioner control method and device, air conditioner and readable storage medium |
| KR20260031565A (en) * | 2024-08-29 | 2026-03-09 | 이상명 | Outdoor unit of air conditioner |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212538134U (en) * | 2020-07-22 | 2021-02-12 | 湖南易信科技有限公司 | Evaporation cooling precision air conditioner |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4346566A (en) * | 1981-06-04 | 1982-08-31 | General Electric Company | Refrigeration system gravity defrost |
| JP2001165516A (en) * | 1999-12-06 | 2001-06-22 | Kubota Corp | Driving method of compressor in refrigeration circuit |
| CN102022871A (en) * | 2010-12-09 | 2011-04-20 | 东莞市泰格冷热设备有限公司 | A thermostatic control device for a cooling and heating integrated machine |
| CN102425829B (en) * | 2011-09-21 | 2013-09-18 | 澳蓝（福建）实业有限公司 | Evaporative type cooling fresh air system and method of adjusting indoor temperature and humidity by using same |
| CN103615774B (en) * | 2013-11-12 | 2017-01-18 | 曙光节能技术（北京）股份有限公司 | Auxiliary device for pump system, control method for auxiliary device and pump system |
| CN105352134A (en) * | 2015-12-03 | 2016-02-24 | 无锡拓能自动化科技有限公司 | Control system for air conditioner of workshop |
| CN107155286A (en) * | 2017-07-13 | 2017-09-12 | 郑州云海信息技术有限公司 | A kind of data center heat dissipation system, vaporising device and whole machine cabinet |
-
2020
- 2020-07-22 CN CN202010709833.0A patent/CN111706946B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212538134U (en) * | 2020-07-22 | 2021-02-12 | 湖南易信科技有限公司 | Evaporation cooling precision air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111706946A (en) | 2020-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111706946B (en) | An evaporative cooling precision air conditioner | |
| CN201187850Y (en) | Pipe type indirect evaporation cooling and spraying type direct evaporation cooling composite air conditioner unit | |
| CN111023374A (en) | An indirect evaporative fluid cooling device | |
| CN111637569B (en) | An indirect evaporative air cooling device | |
| CN108278767B (en) | Evaporative cooling/air cooling heat exchange combined type condenser | |
| CN211668307U (en) | A cooling tower with a pre-cooling device | |
| CN102305443A (en) | Tubular indirect recycling compact evaporation cooling air-conditioning unit | |
| CN102353112B (en) | Packing-type recirculation compact-type evaporation cooling air-conditioning unit | |
| WO2023092873A1 (en) | Indirect evaporative cooling unit, and data center and refrigeration control method therefor | |
| CN110131816A (en) | A water-side evaporative cooling system with auxiliary mechanical refrigeration | |
| CN113670090A (en) | An indirect evaporative fluid cooling device with internal heat exchanger | |
| CN104697076A (en) | Pre-wetting type outdoor air conditioner | |
| JPH11311438A (en) | Air conditioner | |
| CN112268326A (en) | Indirect evaporative cooler and control method | |
| CN212320479U (en) | Indirect evaporative fluid cooling device with built-in heat exchanger | |
| JPH11294832A (en) | Air conditioner | |
| CN212538134U (en) | Evaporation cooling precision air conditioner | |
| CN112240616A (en) | Energy-saving evaporative condensing cold water air conditioning unit system and control method | |
| JP4439534B2 (en) | Air conditioner | |
| CN109827267A (en) | A horizontal composite vertical plate and tube type two-stage indirect evaporative cooling chiller | |
| CN209588260U (en) | A Closed Evaporative Cooling-Condensing Chiller Combined with Mechanical Refrigeration | |
| CN203364293U (en) | Indoor and outdoor air heat exchange device for data center machine room | |
| CN2553290Y (en) | Indirect evaporation-cooling refrigeration air cooler set | |
| CN202581613U (en) | Evaporative air-cooling cold water system | |
| CN211400162U (en) | Indirect evaporative fluid cooling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |