CN106322593B - Evaporative cooling type water chilling unit - Google Patents
Evaporative cooling type water chilling unit Download PDFInfo
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- CN106322593B CN106322593B CN201510390854.XA CN201510390854A CN106322593B CN 106322593 B CN106322593 B CN 106322593B CN 201510390854 A CN201510390854 A CN 201510390854A CN 106322593 B CN106322593 B CN 106322593B
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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
- 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
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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
- 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
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Abstract
The invention discloses an evaporative cooling type water chilling unit which comprises a compressor, a condenser, a throttling device and an evaporator, wherein the evaporator is provided with a refrigerating fluid inlet end and a refrigerating fluid outlet end; in order to save energy consumption when high-temperature return water is treated and improve the energy efficiency ratio of the whole machine, the evaporative cooling type water chilling unit also comprises an evaporative cooling device; the evaporative cooling device is provided with a refrigerating fluid inlet and a refrigerating fluid outlet, and the refrigerating fluid outlet is communicated with the refrigerating fluid inlet end pipeline. The evaporative cooling type water chilling unit is additionally provided with the evaporative cooling device on the traditional water chilling unit, so that the chilled liquid to be cooled firstly passes through the evaporative cooling device for pre-cooling and then enters the evaporator for secondary cooling, and compared with the traditional water chilling unit which is not provided with the evaporative cooling device and only can use the evaporator for primary cooling, the evaporative cooling type water chilling unit can help to save energy consumption when high-temperature return water is treated, and the energy efficiency ratio of the whole machine is greatly improved.
Description
Technical Field
The invention relates to the technical field of water chilling units, in particular to an evaporative cooling type water chilling unit.
Background
In the application of an air conditioner, return water is generally directly sent into an evaporator of a water chilling unit for cooling, but when the temperature of the return water is high and the temperature of the required water supply is low, the evaporator needs to provide an evaporation temperature lower than the temperature of outlet water in the mode, so that the heat transfer temperature difference is large, the irreversible loss is large, namely the water chilling unit is required to consume a large amount of energy to process the high-temperature return water, and the energy efficiency ratio of the whole machine is low and the energy consumption is large.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an evaporative cooling type water chilling unit which can save energy consumption when high-temperature return water is treated and improve the energy efficiency ratio of the whole unit.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
an evaporation cooling type water chilling unit comprises a compressor, a condenser, a throttling device and an evaporator, wherein the evaporator is provided with a refrigerating fluid inlet end and a refrigerating fluid outlet end; in order to save energy consumption when high-temperature return water is treated and improve the energy efficiency ratio of the whole machine, the evaporative cooling type water chilling unit also comprises an evaporative cooling device; the evaporative cooling device is provided with a refrigerating fluid inlet and a refrigerating fluid outlet, and the refrigerating fluid outlet is communicated with the refrigerating fluid inlet end pipeline.
Further, a gas outlet pipeline of the compressor is connected with a gas pipe of a condenser, and a liquid pipe of the condenser is connected with a liquid pipe of the evaporator through the throttling device; the gas pipe pipeline of the evaporator is connected with the air suction port of the compressor.
As the improved scheme of the evaporative cooling type water chilling unit, the evaporative cooling device comprises N evaporative cooling units, and each evaporative cooling unit is provided with a liquid inlet and a liquid outlet; the liquid inlet and the liquid outlet of the N evaporative cooling units are sequentially connected in series through a pipeline, the refrigerating liquid inlet is a liquid inlet of the first evaporative cooling unit, and the refrigerating liquid outlet is a liquid outlet of the Nth evaporative cooling unit; and N is a positive integer.
Preferably, the refrigerating fluid entering the liquid inlet is one or more of return water of the air conditioning system, water supply of the air conditioning system and air conditioning water in the middle process after the return water is cooled.
Preferably, the evaporative cooling unit further comprises a shell, an exhaust fan arranged on an air outlet at the top of the shell, a first heat exchanger arranged in an air inlet at the side surface of the shell, a cooling liquid collecting disc and a cooling liquid circulating pump arranged in the shell, and a cooling liquid sprayer and a second heat exchanger which are arranged in the shell and positioned in an air duct communicating the air inlet and the exhaust fan; the cooling liquid sprayer and the cooling liquid collecting disc are respectively positioned above and below the second heat exchanger; the first heat exchanger is a gas-liquid heat exchanger; the second heat exchanger is at least provided with a refrigerating fluid pipeline; the liquid inlet, the liquid inlet end of the first heat exchanger, the liquid outlet end of the first heat exchanger, the refrigerating fluid pipeline inlet, the refrigerating fluid pipeline outlet and the liquid outlet are sequentially communicated through pipelines; and the inlet pipeline of the cooling liquid circulating pump is communicated with the cooling liquid collecting disc, and the outlet pipeline of the cooling liquid circulating pump is communicated with the cooling liquid sprayer.
More preferably, the number of the first heat exchangers is one or more, the air inlets correspond to the first heat exchangers one to one, and the corresponding first heat exchangers are arranged in the corresponding air inlets; the number of the second heat exchangers is one or more.
More preferably, the first heat exchanger is any one of a fin type heat exchanger or a micro-channel type heat exchanger; the second heat exchanger is any one of a micro-channel type heat exchanger, a serpentine tube type heat exchanger, a plate type heat exchanger or a plate tube type heat exchanger.
Further, the condenser is any one of an evaporative condenser, a water-cooled condenser or an air-cooled condenser.
Furthermore, the condenser is an evaporative condenser, N is a positive integer of more than 2, and part or all of an air outlet of the evaporative cooling unit is communicated with an air inlet of the evaporative condenser.
Or the condenser is an air-cooled condenser, N is a positive integer of more than 2, and part or all of the air outlet of the evaporative cooling unit is communicated with the air inlet of the air-cooled condenser.
Compared with the prior art, the invention has the beneficial effects that:
according to the evaporative cooling type water chilling unit, the evaporative cooling device is additionally arranged on the traditional water chilling unit, so that the chilled liquid to be cooled firstly passes through the evaporative cooling device for pre-cooling and then enters the evaporator for secondary cooling, and compared with the traditional water chilling unit which is not provided with the evaporative cooling device and only can use the evaporator for primary cooling, the evaporative cooling type water chilling unit can help to save energy consumption when high-temperature return water is treated, and the energy efficiency ratio of the whole machine is greatly improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a first preferred embodiment of an evaporative cooling chiller according to the present invention;
FIG. 2 is a schematic diagram of a second preferred embodiment of the evaporative cooling chiller according to the present invention;
FIG. 3 is a schematic diagram of a third preferred embodiment of the evaporative cooling chiller of the present invention;
FIG. 4 is a schematic diagram of a fourth preferred embodiment of the evaporative cooling chiller according to the present invention;
FIG. 5 is a schematic diagram of a fifth preferred embodiment of the evaporative cooling chiller according to the present invention;
FIG. 6 is a schematic diagram of a first preferred construction of the evaporative cooling apparatus of the present invention;
FIG. 7 is a schematic diagram of a second preferred construction of the evaporative cooling apparatus of the present invention;
FIG. 8 is a schematic view of a third preferred construction of the evaporative cooling device of the present invention;
FIG. 9 is a schematic diagram of a fourth preferred configuration of the evaporative cooling device of the present invention;
FIG. 10 is a schematic diagram of a fifth more preferred configuration of the evaporative cooling apparatus of the present invention;
figure 11 is a schematic diagram of a sixth preferred construction of the evaporative cooling apparatus of the present invention.
Wherein the reference numerals of figures 1 to 11 are as follows:
101. a compressor; 102. a condenser; 1021. an air inlet of the condenser; 103. a throttling device; 104. an evaporator; 1041. a refrigerating fluid inlet end; 1042. a refrigerating fluid outlet end; 105. an evaporative cooling device; 1051. a refrigerating fluid inlet; 1052. a refrigerating fluid outlet; 1053. an evaporative cooling unit; 1. a first heat exchanger; 11. the liquid inlet end of the first heat exchanger; 12. the liquid outlet end of the first heat exchanger; 2. a second heat exchanger; 21. a chilled liquid pipe inlet; 22. a chilled liquid pipe outlet; 3. a housing; 31. an air inlet; 32. an air outlet; 4. an exhaust fan; 5. a coolant sprayer; 6. a coolant circulation pump; 61. an inlet of a coolant circulation pump; 62. an outlet of the cooling liquid circulating pump; 7. a coolant collection pan; 8. a refrigerating fluid circulating pump; 81. the inlet of the refrigerating fluid circulating pump; 82. the outlet of the refrigerating fluid circulating pump; 9. a refrigerating fluid flow regulating valve; 91. the inlet of the refrigerating fluid flow regulating valve; 92. the outlet of the refrigerating fluid flow regulating valve; A. a liquid inlet; B. and a liquid outlet.
And, the direction of the dotted arrow in fig. 1 to 11 is the flow direction of the air.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:
example 1
Fig. 1 shows a first embodiment of the evaporative cooling type water chilling unit of the present invention, which includes a compressor 101, a condenser 102, a throttling device 103, and an evaporator 104, where the evaporator 104 is provided with a refrigerant liquid inlet port 1041 and a refrigerant liquid outlet port 1042; the gas outlet pipeline of the compressor 101 is connected with the gas pipe of the condenser 102, and the liquid pipe of the condenser 102 is connected with the liquid pipe of the evaporator 104 through the throttling device 103; the gas pipe pipeline of the evaporator 104 is connected with the suction port of the compressor 101; in order to save energy consumption when high-temperature return water is treated and improve the energy efficiency ratio of the whole machine, the evaporative cooling type water chilling unit also comprises an evaporative cooling device 105; the evaporative cooling device is provided with a refrigerating fluid inlet 1051 and a refrigerating fluid outlet 1052, and the refrigerating fluid outlet 1052 is in pipe communication with the refrigerating fluid inlet 1041.
The working principle of the evaporative cooling type water chilling unit is as follows:
the cooling liquid to be cooled enters the evaporative cooling device 105 from the cooling liquid inlet 1051 to be pre-cooled to form low-temperature cooling liquid, and then enters the evaporator 104 through the cooling liquid outlet 1052 and the cooling liquid inlet 1041 in sequence, so as to prepare for heat exchange with the refrigerant flowing through the evaporator 104.
When the refrigerant is compressed by the compressor 101 into a high-temperature high-pressure gas, the gas enters the condenser 102 through a refrigeration system pipeline, after the gas is absorbed by cooling water in the condenser 102, the high-temperature high-pressure gas is cooled into a low-temperature high-pressure liquid, the low-temperature high-pressure liquid is formed through the throttling device 103 and enters the evaporator 104 to exchange heat with the refrigerant liquid, so as to prepare a low-temperature refrigerant liquid, at the moment, the low-temperature low-pressure liquid in the evaporator 104 absorbs heat from the low-temperature refrigerant liquid input into the evaporator, evaporates and vaporizes and is sucked away by the compressor 101, so as to complete a refrigeration cycle mode, and the temperature of the low-temperature refrigerant liquid is further reduced due to further heat loss in the process of refrigerant vaporization, and finally the low-temperature refrigerant liquid is output to a user side through the refrigerant liquid outlet 1042 of the evaporator, so as to provide a lower-temperature refrigerant liquid for the user.
Because the evaporative cooling type water chilling unit is additionally provided with the evaporative cooling device 105 on the traditional water chilling unit, the chilled liquid to be cooled firstly passes through the evaporative cooling device 105 for pre-cooling and then enters the evaporator 104 for secondary cooling, compared with the traditional water chilling unit which is not provided with the evaporative cooling device 105 and only can use the evaporator 104 for primary cooling, the evaporative cooling type water chilling unit can help to save energy consumption when high-temperature return water is treated, and the energy efficiency ratio of the whole machine is greatly improved.
As an improvement of the evaporative cooling device 105 of the present invention, the evaporative cooling device 105 includes N evaporative cooling units 1053, each evaporative cooling unit 1053 is provided with a liquid inlet and a liquid outlet; the liquid inlets and the liquid outlets of the N evaporative cooling units 1053 are sequentially connected in series through a pipeline, the cooling liquid inlet 1051 is a liquid inlet of the first evaporative cooling unit 1053, and the cooling liquid outlet 1052 is a liquid outlet of the nth evaporative cooling unit 1053; and N is a positive integer.
After adopting the evaporative cooling device improvement scheme, the cooling process of refrigerating fluid is: the cooling liquid to be cooled enters the first-stage evaporative cooling unit 1053 through the liquid inlet of the first-stage evaporative cooling unit 1053 to be cooled, then enters the second and third … … stage evaporative cooling units from the liquid outlet of the first-stage evaporative cooling unit 1053 to the Nth stage evaporative cooling unit 1053 to be cooled, then reaches the cooling liquid inlet end 1041 of the evaporator, and is cooled to the target temperature by the evaporator and then provides the low-temperature cooling liquid for the user through the cooling liquid outlet end 1042 of the evaporator. It should be noted that, when the value of N is larger, the heat exchange efficiency of the evaporative cooling device 105 is higher, so that the heat exchange efficiency of the evaporative cooling type water chilling unit of the present invention is higher.
As a further improvement of the evaporative cooling device of the present invention, as shown in fig. 6, a first preferred structure of the evaporative cooling unit 1053 is: the evaporative cooling unit 1053 further comprises a shell 3, an exhaust fan 4 arranged on an air outlet 32 at the top of the shell 3, a first heat exchanger 1 arranged in an air inlet 31 at the side surface of the shell 3, a cooling liquid collecting tray 7 and a cooling liquid circulating pump 6 arranged in the shell 3, and a cooling liquid sprayer 5 and a second heat exchanger 2 which are arranged in the shell 3 and positioned in an air duct communicating the air inlet 31 and the exhaust fan 4; the cooling liquid sprayer 5 and the cooling liquid collecting tray 7 are respectively positioned above and below the second heat exchanger 2; the first heat exchanger 1 is a gas-liquid heat exchanger; the second heat exchanger 2 is at least provided with a refrigerating fluid pipeline; the liquid inlet A, the liquid inlet end 11 of the first heat exchanger, the liquid outlet end 12 of the first heat exchanger, the refrigerating liquid pipeline inlet 21, the refrigerating liquid pipeline outlet 22 and the liquid outlet B are sequentially communicated through pipelines; the inlet 61 of the cooling liquid circulating pump is communicated with the cooling liquid collecting tray 7 through a pipeline, and the outlet 62 of the cooling liquid circulating pump is communicated with the cooling liquid sprayer 5 through a pipeline.
It should be noted that the number of the first heat exchangers 1 is one or more, the air inlets 31 correspond to the first heat exchangers 1 one to one, and the corresponding first heat exchangers 1 are arranged in the corresponding air inlets 31; the number of the second heat exchanger 2 is one or more. In order to simplify the structure, the number of the first heat exchanger 1 and the second heat exchanger 2 is one in this embodiment. Meanwhile, in order to save production cost and improve production efficiency, the first heat exchanger 1 is any one of a fin type heat exchanger or a micro-channel type heat exchanger; the second heat exchanger 2 is any one of a micro-channel type heat exchanger, a serpentine type heat exchanger, a plate type heat exchanger or a plate and tube type heat exchanger.
The working principle of the evaporative cooling unit is as follows:
the refrigerating fluid to be cooled enters the first heat exchanger 1 through a fluid inlet A of the first-stage evaporative cooling unit 1053 and a fluid inlet end 11 of the first heat exchanger in sequence, and exchanges heat with the normal-temperature air around the first heat exchanger 1 under the action of the exhaust fan 4, the refrigerating fluid to be cooled absorbs the heat of the normal-temperature air, is heated into high-temperature refrigerating fluid, and then enters a refrigerating fluid pipeline of the second heat exchanger 2, and the normal-temperature air is cooled into low-temperature air due to heat loss and flows in the direction of the second heat exchanger 2 so as to prepare for reverse process mass transfer heat exchange with the cooling fluid sprayed by the cooling fluid sprayer 5;
the cooling liquid in the cooling liquid sprayer 5 is sprayed onto the surface of the second heat exchanger 2, part of the cooling liquid is evaporated and is cooled after contacting with the low-temperature air, the theoretical limit temperature of the cooled evaporated cooling liquid is the dew point temperature of the air, the cooled evaporated cooling liquid exchanges heat with the cooling liquid which is not evaporated again to cool the cooling liquid which is not evaporated, and the theoretical limit temperature of the cooled cooling liquid which is not evaporated is also the dew point temperature of the air; the cooling liquid which is not evaporated on the surface of the second heat exchanger 2 is cooled by the evaporation cooling liquid and exchanges heat with the high-temperature cooling liquid flowing inside the cooling liquid pipeline of the second heat exchanger 2 at the same time, so that the high-temperature cooling liquid in the second heat exchanger 2 is cooled to be low-temperature cooling liquid, the theoretical limit temperature of the low-temperature cooling liquid is also the dew point temperature of air, and finally the low-temperature cooling liquid is output to the cooling liquid inlet end of the evaporator through the liquid outlet (namely when the value of N is 1) or enters the liquid inlet of the next-stage evaporative cooling unit 1053 (namely when the value of N is more than 2);
finally, the unevaporated cooling liquid below the second heat exchanger 2 continuously exchanges heat with the evaporated cooling liquid to reduce the temperature until the cooling liquid falls back to the cooling liquid collecting tray 7, and is pumped into the cooling liquid sprayer 5 again under the action of the cooling liquid circulating pump 6 for recycling;
the outdoor air forcibly sucked by the exhaust fan 4 is in countercurrent contact with the cooling liquid sprayed from top to bottom in the device after being cooled by the first heat exchanger 1, so that the evaporation of the cooling liquid is accelerated, the heat of the cooling liquid in the second heat exchanger 2 and the heat of the cooling liquid outside the second heat exchanger 2 are taken away by utilizing the evaporation latent heat of the cooling liquid, and the air is cooled and humidified into low-temperature high-humidity air due to the evaporation of the cooling liquid and is discharged to the atmosphere by the exhaust fan 4.
The specific structure of the evaporative cooling unit of the invention enables the cooling liquid to flow in the pipeline among the liquid inlet A, the first heat exchanger 1, the second heat exchanger 2 and the liquid outlet B, and combines an indirect heat transfer mode of firstly directly exchanging heat between the sprayed cooling liquid and the cooled air sucked into the shell 3 and then exchanging heat between the sprayed cooling liquid and the cooling liquid flowing in the second heat exchanger 2, thereby realizing the cooling of the cooling liquid, simultaneously avoiding the direct contact of the cooling liquid with the air, preventing dust particles in the air from polluting the prepared low-temperature cooling liquid, avoiding the pipeline blockage phenomenon of the evaporator 104 or the next-stage evaporative cooling unit 1053 caused by the dust particles in the low-temperature cooling liquid, also avoiding the unit pipeline blockage phenomenon caused by the prepared low-temperature cooling liquid returning to the interior of the unit, and prolonging the service life of the evaporative cooling device.
In addition, in order to meet the refrigeration requirement of a user on the air conditioning water, as a further improvement of the embodiment, the refrigerating fluid entering the liquid inlet A is one or more of return water of the air conditioning system, water supply of the air conditioning system and air conditioning water in the middle process after the return water is cooled. Furthermore, it should be noted that the cooling liquid may be water or any liquid other than water that can be used to cool an object.
As a further improvement of this embodiment, the condenser 102 is an evaporative condenser, and since the evaporative cooler has superior heat dissipation performance, a large system refrigeration coefficient, and no need of a cooling water tower, not only is the installation space saved, but also the refrigerant circulation amount of the water chilling unit can be reduced, so that the evaporative cooling type water chilling unit of the present invention can achieve the superior effect of energy saving, and meet the use requirements of consumers for energy saving and environmental protection of products.
Example 2
Fig. 2 shows a second embodiment of an evaporative cooling chiller according to the present invention, which differs from the first embodiment shown in fig. 1 in that: n is a positive integer greater than 2, and part or all of the air outlet 32 of the evaporative cooling unit 1053 is communicated with the air inlet 1021 of the evaporative condenser. The air cooled by the evaporative cooling unit 1053 can make the air intake temperature of the evaporative condenser lower than the general ambient temperature, and make the heat exchange performance of the evaporative condenser better, thus the evaporative cooling water chilling unit of the invention has the excellent effect of energy saving as a whole.
Example 3
The third embodiment of the evaporative cooling chiller according to the present invention shown in fig. 3 is different from the first embodiment shown in fig. 1 in that: the condenser 102 is an air-cooled condenser. The air-cooled condenser is simplest to operate and maintain, the equipment investment is low, the air-cooled condenser is suitable for being applied to areas with water resource shortage, and the economic benefit is more obvious for areas with long annual operation time of the unit, so that the evaporative cooling type water chilling unit integrally has the excellent energy-saving effect.
Example 4
Fig. 4 shows a fourth embodiment of an evaporative cooling chiller according to the present invention, which differs from the third embodiment shown in fig. 3 in that: n is a positive integer greater than 2, and part or all of the air outlet 32 of the evaporative cooling unit 1053 is communicated with the air inlet 1021 of the air-cooled condenser. The air cooled by the evaporative cooling unit 1053 can make the air inlet temperature of the air-cooled condenser lower than the general environment temperature, and make the heat exchange performance of the air-cooled condenser better, thus the evaporative cooling water chilling unit of the invention has the excellent effect of energy saving as a whole.
Example 5
Fig. 5 shows a fifth embodiment of an evaporative cooling water chiller according to the present invention, which is different from the first embodiment shown in fig. 1 in that: the condenser 102 is a water-cooled condenser. The water-cooled condenser has mature condensation technology, so the evaporative cooling type water chilling unit can operate more stably.
The structure of the evaporative cooling unit 1053 of the evaporative cooling type water chilling unit described in the above embodiments 1 to 5 may adopt the following 5 preferable structures as an alternative:
Figure 7 shows a second preferred construction of an evaporative cooling unit 1053 according to the invention, which differs from the first preferred construction shown in figure 6 in that: the evaporative cooling unit 1053 further comprises a refrigerating fluid circulating pump 8, an inlet 81 of the refrigerating fluid circulating pump is communicated with the liquid outlet B, an outlet 82 of the refrigerating fluid circulating pump is communicated with the liquid inlet a, so that the prepared low-temperature refrigerating fluid is divided into two paths, one path of the low-temperature refrigerating fluid flows to the liquid outlet B and is output to a refrigerating fluid inlet end of the evaporator (namely when the value of N is 1) or enters a liquid inlet of the next-stage evaporative cooling unit (namely when the value of N is more than 2), the other path of the low-temperature refrigerating fluid can be re-injected into the evaporative cooling unit, the temperature of the refrigerating fluid at the refrigerating fluid inlet a can be further reduced, the refrigerating fluid in the first heat exchanger 1 can be increased only by absorbing more heat to the air around the first heat exchanger 1, the purpose of further reducing the air temperature around the first heat exchanger 1 is achieved, and when the air is sucked into the casing 3 by the exhaust fan 4, the cooling effect of the sprayed cooling fluid can be accelerated, the cooling rate of the refrigerating fluid in the second heat exchanger 2 is finally accelerated, the heat exchange efficiency of the evaporative cooling unit is improved, and the overall heat exchange efficiency of the evaporative cooling unit is finally improved.
Fig. 8 shows a third preferred construction of an evaporative cooling unit 1053 of the present invention, which differs from the first preferred construction of fig. 6 in that: this preferred structure has add an more first heat exchanger 1, specifically is: the number of the first heat exchangers 1 is two, and the number of the air inlets 31 on the side surface of the shell 3 is two; the two first heat exchangers 1 are respectively and correspondingly installed in the two air inlets 31; the liquid inlet ends 11 of the two first heat exchangers are communicated with the liquid inlet A, and the liquid outlet ends 12 of the two first heat exchangers are communicated with the refrigerating liquid pipeline inlet 21 of the second heat exchanger 2.
The specific flow directions of the cooling liquid in the evaporative cooling unit 1053 are: refrigerating fluid to be cooled enters the evaporative cooling unit through the liquid inlet A, then is divided into two paths to respectively flow into the two first heat exchangers 1 to exchange heat with outdoor air forcibly sucked by the exhaust fan 4, the refrigerating fluid is heated and then is sent into a refrigerating fluid pipeline of the second heat exchanger 2 at the lower part of the cooling fluid sprayer 5 to be cooled, and the cooled refrigerating fluid is output to a refrigerating fluid inlet end of the evaporator (namely when the value of N is 1) through the liquid outlet B of the evaporative cooling unit or enters a liquid inlet of the next-stage evaporative cooling unit (namely when the value of N is more than 2).
Compared with the first preferred structure which only adopts one first heat exchanger 1, the preferred structure enables cold low-temperature air in the shell 3 to flow to the second heat exchanger 2 by one time, so that refrigerating fluid in the second heat exchanger 2 can be cooled to a target temperature more quickly, the heat exchange efficiency of the second heat exchanger 2 is greatly improved, the heat exchange efficiency of the evaporative cooling unit is improved, and the aim of improving the overall heat exchange efficiency of the evaporative cooling type water chilling unit is finally fulfilled.
Preferred Structure 4
Fig. 9 shows a fourth preferred configuration of the evaporative cooling unit 1053 of the present invention, which differs from the first preferred configuration shown in fig. 6 in two ways.
The first difference is that: the number of the second heat exchangers 2 in the preferred structure is two; an inlet 21 and an outlet 22 of a refrigerating fluid pipeline of the first second heat exchanger 2 are respectively and correspondingly communicated with the liquid outlet end 12 of the first heat exchanger and the inlet 21 of the refrigerating fluid pipeline of the second heat exchanger, and the outlet 22 of the refrigerating fluid pipeline of the second heat exchanger 2 is communicated with the liquid outlet B. In order to make the structure more compact, the two second heat exchangers 2 are arranged in the up-down direction, and the first second heat exchanger 2 is positioned below the coolant sprayer 5, and the second heat exchanger 2 is positioned below the first second heat exchanger 2.
The specific flow directions of the cooling liquid in the evaporative cooling unit 1053 are: refrigerating fluid to be cooled enters the evaporative cooling unit 1053 of the invention through the liquid inlet A, flows into the first heat exchanger 1, exchanges heat with outdoor air forcibly sucked by the exhaust fan 4, is heated, then is sent into the refrigerating fluid pipeline of the first second heat exchanger 2 at the lower part of the cooling fluid sprayer 5 to be cooled, and then is sent into the refrigerating fluid pipeline of the second heat exchanger 2 to be cooled for the second time, and finally is output to the refrigerating fluid inlet end of the evaporator (namely when the value of N is 1) or enters the liquid inlet of the next-stage evaporative cooling unit (namely when the value of N is more than 2) through the liquid outlet B of the evaporative cooling unit of the invention.
Compared with the first preferred structure which only adopts one second heat exchanger 2, the embodiment uses two second heat exchangers 2, so that the refrigerating fluid output from the liquid outlet end 12 of the first heat exchanger is cooled for the second time, the refrigerating fluid is cooled to the target temperature more quickly, the heat exchange efficiency of the evaporative cooling unit is greatly improved, and the purpose of improving the overall heat exchange efficiency of the evaporative cooling type water chilling unit is finally achieved.
The second difference is that: the optimized structure further comprises a refrigerating fluid circulating pump 8, an inlet 81 pipeline of the refrigerating fluid circulating pump is communicated with the refrigerating fluid pipeline outlet 22 of the first second heat exchanger 2, an outlet 82 pipeline of the refrigerating fluid circulating pump is communicated with the liquid inlet A, so that low-temperature refrigerating fluid prepared by the first second heat exchanger 2 is divided into two paths, one path of the low-temperature refrigerating fluid flows to the second heat exchanger 2 to be secondarily cooled, the other path of the low-temperature refrigerating fluid can be injected into the evaporative cooling unit again, the temperature of the refrigerating fluid at the liquid inlet A is further reduced, the refrigerating fluid in the first heat exchanger 1 can be increased only by absorbing more heat to the air around the first heat exchanger 1, the purpose of further reducing the temperature of the air around the first heat exchanger 1 is achieved, when the air is sucked into the shell 3 by the exhaust fan 4, the cooling effect of the air on the sprayed cooling fluid can be accelerated, the cooling speed of the refrigerating fluid in the second heat exchanger 2 is finally accelerated, the heat exchange efficiency of the evaporative cooling unit is improved, and the purpose of further improving the overall efficiency of cold water evaporation cooling type unit is finally achieved.
Fig. 10 shows a fifth preferred configuration of the evaporative cooling unit 1053 of the present invention, which differs from the third preferred configuration shown in fig. 8 in two ways.
The first difference is that: the liquid inlet A pipeline is communicated with the liquid outlet end 12 of the first heat exchanger, so that the refrigerating fluid at the liquid inlet A is directly guided to the liquid outlet end 12 of the first heat exchanger, the temperature of the refrigerating fluid flowing into the refrigerating fluid pipeline of the second heat exchanger 2 is reduced, the heat exchange efficiency of the second heat exchanger 2 is improved, the heat exchange efficiency of the evaporative cooling unit 1053 is improved, and the purpose of improving the overall heat exchange efficiency of the evaporative cooling type water chilling unit is achieved.
Further, this preferred structure still includes refrigerating fluid flow control valve 9, inlet A pipeline intercommunication refrigerating fluid flow control valve's entry 91, refrigerating fluid flow control valve's export 92 pipeline intercommunication first heat exchanger goes out liquid end 12, through setting up refrigerating fluid flow control valve 9 to can control the flow size of the refrigerating fluid of directly leading to first heat exchanger play liquid outlet 12's entry department, thereby realize adjusting 2 heat exchange efficiency's of second heat exchanger function, satisfy the user demand of user to the evaporation formula cooling unit function diversification.
The second difference is that: the optimized structure further comprises a refrigerating fluid circulating pump 8, an inlet 81 pipeline of the refrigerating fluid circulating pump is communicated with the liquid outlet B, and an outlet 82 pipeline of the refrigerating fluid circulating pump is communicated with the liquid inlet A, so that the prepared low-temperature refrigerating fluid is divided into two paths, one path of the low-temperature refrigerating fluid flows to the liquid outlet B to be output to a refrigerating fluid inlet end of an evaporator (namely when the value of N is 1) or enter a liquid inlet of the next-stage evaporative cooling unit (namely when the value of N is more than 2), and the other path of the low-temperature refrigerating fluid can be injected into the evaporative cooling unit again, so that the temperature of the refrigerating fluid at the liquid inlet A is further reduced; on one hand, the refrigerating fluid in the first heat exchanger 1 can be heated up only by absorbing more heat to the air around the first heat exchanger 1 so as to achieve the purpose of further reducing the temperature of the air around the first heat exchanger 1, and when the air is pumped into the shell 3 by the exhaust fan 4, the cooling effect of the air on the sprayed cooling fluid can be accelerated, the cooling speed of the refrigerating fluid in the second heat exchanger 2 is finally accelerated, and the heat exchange efficiency of the evaporative cooling unit is improved; on the other hand, due to the existence of the first difference point, the temperature of the refrigerating fluid in the refrigerating fluid pipeline flowing into the second heat exchanger 2 can be further reduced, and the heat exchange efficiency of the second heat exchanger 2 can be further improved, so that the heat exchange efficiency of the evaporative cooling unit can be further improved, and the overall heat exchange efficiency of the evaporative cooling type water chilling unit is greatly improved.
Fig. 11 is a sixth preferred configuration of the evaporative cooling unit 1053 of the present invention, which differs in two from the first preferred configuration shown in fig. 6.
The first difference is that: the number of the first heat exchanger 1 and the second heat exchanger 2 is two; the number of the air inlets 31 on the side surface of the shell 3 is two; the two first heat exchangers 1 are respectively and correspondingly installed in the two air inlets 31; the liquid inlet ends 11 of the two first heat exchangers are communicated with the liquid inlet A, the liquid outlet ends 12 of the two first heat exchangers are communicated with a refrigerating fluid pipeline inlet 21 of the first second heat exchanger 2, a refrigerating fluid pipeline outlet 22 of the first second heat exchanger 2 is communicated with a refrigerating fluid pipeline inlet 21 of the second heat exchanger 2, and a refrigerating fluid pipeline outlet 22 of the second heat exchanger 2 is communicated with the liquid outlet B. In order to make the structure more compact, the two second heat exchangers 2 are arranged in the up-down direction, and the first second heat exchanger 2 is positioned below the coolant sprayer 5, and the second heat exchanger 2 is positioned below the first second heat exchanger 2.
The specific flow directions of the refrigerating fluid in the evaporative cooling unit are as follows: refrigerating fluid to be cooled enters the evaporative cooling unit through the liquid inlet A, then is divided into two paths to flow into the two first heat exchangers 1 to exchange heat with outdoor air forcibly sucked by the exhaust fan 4, the refrigerating fluid is heated, then is sent into a refrigerating fluid pipeline of the first second heat exchanger 2 at the lower part of the cooling fluid sprayer 5 to be cooled, the cooled refrigerating fluid is sent into a refrigerating fluid pipeline of the second heat exchanger 2 to be cooled for the second time, and finally is sent to a refrigerating fluid inlet end of the evaporator (namely when the value of N is 1) or enters a liquid inlet of the next-stage evaporative cooling unit (namely when the value of N is more than 2) through the liquid outlet B of the evaporative cooling unit.
Compared with the first preferred structure which only adopts one first heat exchanger 1 and one second heat exchanger 2, on one hand, the two first heat exchangers 1 are used to enable twice as much cold low-temperature air in the shell 3 to flow to the second heat exchanger 2, so that the heat exchange efficiency of the second heat exchanger 2 is greatly improved, on the other hand, the two second heat exchangers 2 are used to enable the refrigerating fluid output by the liquid outlet ends 12 of the two first heat exchangers to be cooled for the second time, so that the refrigerating fluid is cooled to the target temperature more quickly, the heat exchange efficiency of the evaporative cooling unit is greatly improved, and the purpose of improving the overall heat exchange efficiency of the evaporative cooling type water chilling unit is finally achieved.
The second difference is that: the optimized structure further comprises a refrigerating fluid circulating pump 8, an inlet 81 pipeline of the refrigerating fluid circulating pump is communicated with the refrigerating fluid pipeline outlet 22 of the first second heat exchanger 2, an outlet 82 pipeline of the refrigerating fluid circulating pump is communicated with the liquid inlet A, so that the prepared low-temperature refrigerating fluid is divided into two paths, one path of the low-temperature refrigerating fluid flows to the second heat exchanger 2 for secondary cooling, the other path of the low-temperature refrigerating fluid can be injected into the evaporative cooling unit again, the temperature of the refrigerating fluid at the liquid inlet A is further reduced, the refrigerating fluid in the two first heat exchangers 1 can be increased only by absorbing more heat to the air around the two first heat exchangers 1 respectively, the temperature of the air around the two first heat exchangers 1 is further reduced, when the air is sucked into the shell 3 by the exhaust fan 4, the cooling effect of the sprayed cooling fluid can be accelerated, the cooling speed of the refrigerating fluid in the two second heat exchangers 2 is finally accelerated, the heat exchange efficiency of the evaporative cooling unit is further improved, and the purpose of further improving the overall heat exchange efficiency of the evaporative cooling type cold water unit is finally achieved.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. An evaporation cooling type water chilling unit comprises a compressor, a condenser, a throttling device and an evaporator, wherein the evaporator is provided with a refrigerating fluid inlet end and a refrigerating fluid outlet end, an air outlet pipeline of the compressor is connected with a gas pipe of the condenser, and a liquid pipe of the condenser is connected with a liquid pipe of the evaporator through the throttling device; the gas pipeline of the evaporator is connected with the air suction port of the compressor; the method is characterized in that: also comprises an evaporative cooling device; the evaporative cooling device is provided with a refrigerating fluid inlet and a refrigerating fluid outlet; the refrigerating fluid outlet is communicated with the refrigerating fluid inlet end pipeline; the condenser is any one of an evaporative condenser or an air-cooled condenser; the evaporative cooling device comprises N evaporative cooling units and a shell, wherein the top of the shell is provided with an air outlet, and the air outlet of the evaporative cooling unit is communicated with the air inlet of the condenser; each evaporative cooling unit is provided with a liquid inlet and a liquid outlet; the liquid inlet and the liquid outlet of the N evaporative cooling units are sequentially connected in series through a pipeline; the evaporative cooling unit comprises an exhaust fan arranged on an air outlet at the top of the shell, a first heat exchanger arranged in an air inlet on the side surface of the shell, a cooling liquid collecting disc and a cooling liquid circulating pump which are arranged in the shell, and a cooling liquid sprayer and a second heat exchanger which are arranged in the shell and positioned in an air channel communicating the air inlet and the exhaust fan, wherein the second heat exchanger is provided with a refrigerating liquid pipeline; the liquid inlet, the liquid inlet end of the first heat exchanger, the liquid outlet end of the first heat exchanger, the refrigerating fluid pipeline inlet, the refrigerating fluid pipeline outlet and the liquid outlet are sequentially communicated through pipelines; and the inlet pipeline of the cooling liquid circulating pump is communicated with the cooling liquid collecting disc, and the outlet pipeline of the cooling liquid circulating pump is communicated with the cooling liquid sprayer.
2. The evaporative cooling chiller as set forth in claim 1, wherein: the refrigerating fluid inlet is a fluid inlet of a first evaporative cooling unit, and the refrigerating fluid outlet is a fluid outlet of an Nth evaporative cooling unit; and N is a positive integer.
3. The evaporative cooling chiller as set forth in claim 2, wherein: the refrigerating fluid entering the liquid inlet is one or more than two of return water of the air conditioning system, water supply of the air conditioning system and air conditioning water in the middle process after the return water is cooled.
4. An evaporative cooling chiller as set forth in claim 1 wherein: the cooling liquid sprayer and the cooling liquid collecting tray are respectively positioned above and below the second heat exchanger; the first heat exchanger is a gas-liquid heat exchanger.
5. The evaporative cooling chiller as set forth in claim 1, wherein: the number of the first heat exchangers is one or more, the air inlets correspond to the first heat exchangers one by one, and the corresponding first heat exchangers are arranged in the corresponding air inlets; the number of the second heat exchangers is one or more.
6. The evaporative cooling chiller as set forth in claim 1, wherein: the first heat exchanger is any one of a fin type heat exchanger or a micro-channel type heat exchanger; the second heat exchanger is any one of a micro-channel type heat exchanger, a serpentine type tube heat exchanger, a plate type heat exchanger or a plate tube type heat exchanger.
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| CN201510390854.XA CN106322593B (en) | 2015-07-03 | 2015-07-03 | Evaporative cooling type water chilling unit |
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| CN201510390854.XA CN106322593B (en) | 2015-07-03 | 2015-07-03 | Evaporative cooling type water chilling unit |
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Denomination of invention: An evaporative cooling water chiller Effective date of registration: 20221219 Granted publication date: 20221115 Pledgee: China Co. truction Bank Corp Guangzhou Liwan branch Pledgor: GUANGZHOU WIDE INDUSTRIAL Co.,Ltd. Registration number: Y2022980027703 |
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