CN111594962A - Fluorine pump energy-saving indirect evaporative cooling air conditioning unit and control method - Google Patents
Fluorine pump energy-saving indirect evaporative cooling air conditioning unit and control method Download PDFInfo
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- CN111594962A CN111594962A CN202010567934.9A CN202010567934A CN111594962A CN 111594962 A CN111594962 A CN 111594962A CN 202010567934 A CN202010567934 A CN 202010567934A CN 111594962 A CN111594962 A CN 111594962A
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 47
- 239000011737 fluorine Substances 0.000 title claims abstract description 47
- 238000001816 cooling Methods 0.000 title claims abstract description 37
- 238000004378 air conditioning Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 43
- 239000007921 spray Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 17
- 230000005494 condensation Effects 0.000 abstract description 8
- 238000009833 condensation Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 75
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 7
- 230000008014 freezing Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 208000001034 Frostbite Diseases 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F24F5/0035—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
-
- 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
- F24F11/89—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
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- 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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
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- Sustainable Development (AREA)
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Abstract
The invention discloses a fluorine pump energy-saving indirect evaporative cooling air conditioning unit and a control method thereof, wherein the unit comprises a heat exchange core arranged in a unit shell, an outdoor side air flow passage used for conveying cold air and an indoor side air flow passage used for conveying hot air, wherein the outdoor side air flow passage flows through an outdoor air passage of the heat exchange core, the indoor side air flow passage flows through an indoor air passage of the heat exchange core, the unit also comprises a controller, a fluorine circulating pump, a flow control part, a condenser and an evaporator arranged in the indoor side air flow passage, the condenser is positioned at a position between an outdoor side air inlet and the heat exchange core of the outdoor side air flow passage, the condenser, the fluorine circulating pump, the flow control part and the evaporator are connected through copper pipes to form a loop, and the fluorine circulating pump and the flow control part are respectively and electrically connected with. The invention is used for solving the problems of condensation and icing on the inner side of the unit heat exchange core body at the extremely low temperature and simultaneously improving the refrigeration efficiency of the unit at the extremely low temperature.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an energy-saving fluorine pump indirect evaporative cooling air conditioning unit and a control method.
Background
As shown in patent documents CN201822222249.3 and CN201821974088.7, an indirect evaporative air conditioning system for a data center generally includes a water spray system, an inside air system, an outside air system, a heat exchange core that exchanges heat between inside air and outside air, and an auxiliary cooling system. And there are three main modes of operation: dry mode, wet mode + mixed mode of mechanical refrigeration (or other means of cold replenishment such as chilled water coil replenishment). When the application environment temperature is lower, the dry mode is operated, the water spraying system at the outer side of the unit is not started, and the air at the outer side of the unit and the air at the inner side of the unit are refrigerated through heat exchange by the heat exchange core body; when the application environment is mild, the wet mode is operated, the unit spraying system is started at the moment, and after water is evaporated to cool the air outside the room, heat exchange is carried out through the heat exchange core body, so that the temperature of the air inside the room is reduced; when the outdoor environment temperature is high in dry bulb temperature and high in wet bulb temperature, the spraying system and the auxiliary cold supplement system are started at the same time, and the unit runs a mixed mode.
When ambient temperature is extremely low, the too much phenomenon even that freezes of comdenstion water probably appears in current indirect evaporative cooling air conditioning unit's heat transfer core inboard, take place for avoiding this phenomenon, current solution is to pass through blast gate part bypass to air inlet with the air-out after the outside heat transfer, in order to improve air inlet temperature, nevertheless this way can reduce the heat transfer volume of follow-up heat transfer core, the refrigeration effect that leads to indoor crosswind reduces, and need increase equipment such as blast gate, make unit structure complicated, the complete machine volume increases, and the cost is increased. The electric heating wire is installed at the air inlet on the outdoor side, but the refrigerating effect of the unit can be reduced by the method, and meanwhile, the electric energy is additionally consumed, so that the improvement of the heat exchange efficiency under the low-temperature working condition is not facilitated.
Disclosure of Invention
The invention aims to solve the problems of condensation and icing on the inner side of the heat exchange core body of the unit at the extremely low temperature and improve the refrigeration efficiency of the unit at the extremely low temperature.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides an indirect evaporative cooling air conditioning unit of fluorine pump energy-conservation, is including locating the inside heat transfer core of unit casing, the outdoor crosswind runner that is used for carrying cold wind, be used for carrying hot-blast indoor crosswind runner, outdoor crosswind runner flows through the outdoor air passageway of heat transfer core, indoor crosswind runner flows through the indoor air passageway of heat transfer core, still includes controller, fluorine circulating pump, flow control part, condenser, locates the evaporimeter in the indoor crosswind runner, the condenser is located outdoor crosswind runner from the position between the outdoor side air intake to the heat transfer core, and condenser, fluorine circulating pump, flow control part, evaporimeter four form the return circuit through copper union coupling, and fluorine circulating pump, flow control part electricity connection director respectively.
Furthermore, the evaporator is positioned at a position between the indoor side air inlet and the heat exchange core body of the indoor side air flow passage.
Further, the flow control member is an expansion valve.
Furthermore, a circulating fan which supplies air towards an outdoor side air outlet is arranged in the outdoor side air flow channel, and the circulating fan is electrically connected with the controller.
Further, still include two sets at least electric connection controller's evaporation cooling system, every set evaporation cooling system all is equipped with the nozzle, and one of them set of evaporation cooling system's nozzle is located the position between outdoor side air intake to the heat transfer core of outdoor crosswind runner, and is used for aiming at the heat transfer core sprays, and another set of evaporation cooling system's nozzle is located the position between outdoor side air outlet from the heat transfer core of outdoor crosswind runner, and is used for aiming at the heat transfer core sprays.
The outdoor side wind temperature collection device comprises a heat exchange core body, a first temperature sensor and a second temperature sensor, wherein the heat exchange core body is used for exchanging heat with the outdoor side wind, the first temperature sensor is used for collecting the outdoor side wind temperature before heat exchange of the heat exchange core body, and the second temperature sensor is used for collecting the outdoor side wind temperature after heat exchange of the heat exchange core body.
Further, the first temperature sensor is located at a position between the condenser and the heat exchange core of the outdoor side air flow channel.
When the temperature of outdoor side wind before heat exchange of the heat exchange core body is detected to be lower than a set threshold, the fluorine circulating pump is started to take heat from the indoor side wind through the evaporator, and the heat is released from the outdoor side wind through the condenser.
Further, the rotating speed of a circulating fan which is positioned in the outdoor side air flow channel and supplies air towards the outdoor side air outlet is reduced so as to control the temperature rise degree of the outdoor side air.
Further, the following steps are also executed after the fluorine circulating pump is started:
if the outdoor side air temperature before heat exchange of the heat exchange core is detected to be larger than a set value T1, spraying and radiating the heat exchange core in an outdoor side air flow passage before heat exchange of the heat exchange core, and also spraying and radiating the heat exchange core in an outdoor side air flow passage after heat exchange of the heat exchange core;
if the outdoor side air temperature before heat exchange of the heat exchange core is detected to be less than a set value T1 and the outdoor side air temperature after heat exchange of the heat exchange core is detected to be greater than a set value T1, the heat exchange core is sprayed and radiated only in an outdoor side air flow channel after heat exchange of the heat exchange core;
and if the outdoor crosswind temperature before heat exchange of the heat exchange core is detected to be less than a set value T1 and the outdoor crosswind temperature after heat exchange of the heat exchange core is detected to be less than a set value T1, the heat exchange core is not sprayed and radiated.
The invention has the advantages that at the extremely low temperature, the evaporator absorbs heat from indoor crosswind, and the heat is transferred to the condenser to heat the outdoor crosswind, thereby solving the problems of condensation or freezing on the inner side of the heat exchange core body.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like elements throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram showing the overall structure of an indirect evaporative cooling air conditioning unit of the invention;
FIG. 2 shows the position relationship among the indoor side wind channel, the outdoor side wind channel and the water tank of the unit of the invention;
fig. 3 shows a schematic diagram of the structure of a dual stage spraying system of the unit of the invention;
fig. 4 shows a schematic of the fluorine pump refrigeration system of the assembly of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The indirect evaporative cooling air conditioning unit of this embodiment is, as shown in fig. 1, composed of a compressor cold compensation system, a fluorine pump refrigeration system, a first spray system, a second spray system, a first heat exchanger core 16, a second heat exchanger core 17, an indoor side air circulation system, and an outdoor side air circulation system.
As shown in fig. 2, in order to achieve compact structure, the inside of the unit casing is divided into 5 chambers by partition plates, namely an outer air inlet chamber a1, an outer air outlet chamber a2, an inner air inlet chamber B1, an inner air outlet chamber B2 and a water tank accommodating chamber C, and the outer air inlet chamber a1 and the outer air outlet chamber a2 are distributed at the upper parts of the left side and the right side of the unit casing, so that cold air can sink conveniently; the inner air inlet chamber B1 and the inner air outlet chamber B2 are distributed in the middle of the left side and the right side in the unit, so that heat exchange is facilitated in the sinking process of cold air; the water tank accommodating cavity C is arranged at the bottom in the unit and used for accommodating the water tank, and the gravity center of the whole machine is moved downwards by using the water tank to stabilize the whole machine.
The first heat exchange core 16 and the second heat exchange core 17 are air-air heat exchangers, an outdoor air inlet of the first heat exchange core 16 is communicated with an outside air inlet chamber A1, an outdoor air outlet is communicated with a water tank accommodating chamber C, an indoor air inlet is communicated with an inside air inlet chamber B1, and an indoor air outlet is communicated with an indoor air inlet of the second heat exchange core 17; an outdoor air inlet of the second heat exchange core 17 is communicated with the water tank accommodating cavity C, an outdoor air outlet is communicated with the outer air outlet chamber a2, an indoor air inlet is communicated with an indoor air outlet of the first heat exchange core 16, and an indoor air outlet is communicated with the inner air outlet chamber B2.
The outdoor side air inlet 5 is formed in the side wall of the outside air inlet chamber a1, the outdoor side air outlet 23 is formed in the side wall of the outside air outlet chamber a2, and the circulating fan 24 is arranged in the outside air outlet chamber a2 to supply air towards the outdoor side air outlet 23, so that the outdoor side air inlet 5, the outside air inlet chamber a1, the outdoor air channel of the first heat exchange core 16, the water tank accommodating chamber C, the outdoor air channel of the second heat exchange core 17, the outside air outlet chamber a2, the circulating fan 24 and the outdoor side air outlet 23 form the outdoor side air circulating system for implementing outdoor side air circulation.
Similarly, an indoor side air inlet 13 for butt-joint to the inside of the data center is formed in the side wall of the inner side air inlet chamber B1, an indoor side air outlet 20 is formed in the side wall of the inner side air outlet chamber B2, and a circulating fan 21 is arranged in the inner side air outlet chamber B2 to supply air towards the indoor side air outlet 20, so that the indoor side air inlet 13, the inner side air inlet chamber B1, an indoor air channel of the heat exchange core bodies 16 and 17, the inner side air outlet chamber B2, the circulating fan 21 and the indoor side air outlet 20 form the indoor side air circulating system and are used for implementing indoor side air circulation.
Further, as shown in fig. 1, a filter 12 covering the indoor air inlet 13 is disposed in the indoor air inlet chamber B1 to filter dust in the indoor air and clean the indoor air.
See fig. 2, during the use, outdoor crosswind gets into the unit and sinks naturally after, sinks the in-process earlier with 16 heat transfer back temperature rises of first heat transfer cores, gets into water tank holding chamber C and water tank 15 contact again, is favorable to the water tank 15 to prevent frostbite, because water tank 15 arranges the unit inside in simultaneously, can avoid water tank 15's water and external wind direct contact, is favorable to restraining the microorganism growth, prevents that the algae growth from blockking up spraying system in the water tank, extension spraying system life.
The outside wind in the water tank holding chamber C is cooled by the water evaporation heat absorption of the water tank at the water tank 15, and is pumped out of the unit by the circulating fan 24, and then exchanges heat with the second heat exchange core body 17 in the flowing process, and at the moment, the indoor side wind is cooled secondarily, and because the outdoor side wind is lower in temperature, the secondary cooling effect is obvious.
Referring to fig. 3, as a preferred embodiment, in order to improve the cooling effect, a spraying system is provided, wherein, in order to increase the wet mode operation range of the unit and improve the heat exchange efficiency of the unit compared with the prior art, the spraying system is divided into two sets, the first spraying system comprises a water pump 14 and a water distributor 7, the second spraying system comprises a water pump 18 and a water distributor 4, and the water pump 14 and the water pump 18 share the same water tank 15.
The water distributor 7 and the water distributor 4 are both composed of spray rods and spray heads connected to the spray rods, and are communicated to corresponding water pumps through respective pipelines respectively, and the water pumps convey water to the water distributors. The water distributor 7 is arranged in the outer side air inlet chamber A1 and is positioned right above the first heat exchange core 16, the water distributor 4 is arranged in the outer side air outlet chamber A2 and is positioned right above the second heat exchange core 17, the water distributor and the second heat exchange core are uniformly sprayed to the heat exchange cores through the spray heads to evaporate and cool the heat exchange cores and enhance heat exchange, and water which is not evaporated flows into the water tank under the action of gravity, so that the water is repeatedly circulated.
For realizing the intelligent control of spraying two sets of systems, set up first temperature sensor 25 at the outdoor air entrance of first heat exchange core 16, set up second temperature sensor 26 at the outdoor air entrance of second heat exchange core 17, first temperature sensor 25, second temperature sensor 26, water pump 14, water pump 18 are electric connection director respectively, then:
when the first temperature sensor 25 detects that the ambient temperature is high (for example, more than 15 ℃), the first spraying system and the second spraying system are simultaneously started, outdoor side air is subjected to heat exchange with indoor side air through the heat exchange cores 16 and 17 after being subjected to evaporative cooling by spraying water, and the indoor side air is cooled;
when the first temperature sensor 25 detects that the ambient temperature is low (for example, less than 2 ℃), at this time, water may be frozen due to direct contact between outdoor side air and water, so the controller stops the water pump 14, the first spraying system is closed to implement protection, at this time, low-temperature air on the outer side exchanges heat with high-temperature air on the indoor side through the first heat exchange core 16, the heated air flows to the second temperature sensor 26, and if the second temperature sensor 26 detects that the dry bulb temperature of the air before entering the second heat exchange core 17 is greater than a set value T1 (for example, 15 ℃), the second spraying system is opened to cool the outdoor side air, so that the indoor side air is further cooled through the second heat exchange core 17.
This embodiment is through setting up two sets of spraying systems and separately controlling it, can effectively avoid water tank, water pump, water pipe to freeze risk such as, improves the temperature range lower limit of wet operating mode operation simultaneously (can not open to spray and further cool down in order to prevent frostbite when originally outdoor crosswind 2 ℃, can also realize spraying after the heat transfer core body heating now), has improved the unit efficiency all the year.
It should be noted that, in this embodiment, the concept of separately providing two sets of spraying systems and separately controlling the spraying systems is not limited to be applied to the specific air flow passage shown in fig. 2, and may also be applied to the existing general indirect evaporative cooling air conditioning unit. When the spray system is applied to other universal indirect evaporative cooling air conditioning units, only the embodiment is needed to be referred, the nozzles of one set of spray system are arranged in the outdoor crosswind channel before heat exchange and are aligned with the heat exchange core body for spraying, the nozzles of the other set of spray system are arranged in the outdoor crosswind channel after heat exchange and are aligned with the heat exchange core body for spraying, and then the control mode of the spray system is referred to for implementing control, so that the aim of improving the lower limit of the temperature range of wet working condition operation is achieved.
It should be noted that, in this embodiment, the spraying system may be replaced by other evaporative cooling systems, such as a spraying system, to achieve the same effect.
Furthermore, as shown in fig. 1, a filter 8 and a water baffle 3 are also arranged in the outdoor side air circulating system, the filter 8 is arranged in the outdoor side air inlet chamber a1 and covers the outdoor side air inlet 5 to filter air microparticles outside the chamber and reduce pollution to the sprayed water quality; the water baffle 3 is arranged in the outer air outlet chamber A2 and covers the outdoor air outlet of the second heat exchange core body 17, so that when the spraying is started, the outdoor side air circulation brings the water vapor out of the unit, and the water utilization rate is improved.
As another preferred embodiment, in order to avoid the problems of excessive condensed water or icing inside the heat exchange core when the ambient temperature is low, and improve the low-temperature refrigeration efficiency of the unit, in this embodiment, the fluorine pump technology is further combined with the indirect evaporative cooling technology, specifically, as shown in fig. 4, a condenser 6 covering the outdoor air inlet 5 is arranged in the outside air inlet chamber a1, an evaporator 11 covering the indoor air inlet of the first heat exchange core 16 is arranged in the inside air inlet chamber B1, and the condenser 6, the fluorine circulating pump 9, the flow control component 10, and the evaporator 11 are sequentially connected through copper pipes to form a loop, thereby forming the fluorine pump refrigeration system.
Among the above, the flow control member 10 is an electronic expansion valve, and if the head difference between the evaporator 11 and the condenser 6 is sufficiently large (larger than 5m), a heat pipe refrigeration system without a fluorine pump may be used.
The fluorine circulation pump 9 and the flow rate control member 10 were electrically connected to the controller, and the following fluorine pump control method was performed by the first temperature sensor 25 in the same manner:
when the first temperature sensor 25 detects that the outdoor temperature is extremely low (for example, less than-20 ℃), the fluorine pump refrigerating system is started by controlling the fluorine circulating pump 9, refrigerant in the fluorine pump system absorbs heat of indoor side air in the evaporator 11 and evaporates into a gas state, then the refrigerant enters the condenser 6 to be condensed and released into a liquid state, so that the outdoor side air entering the unit is heated, the temperature of the outdoor side air is increased, the liquid refrigerant is subjected to frequency conversion regulation by the fluorine circulating pump 9 and is throttled by the flow control component 10 and then returns to the evaporator 11, and in the process, the flow of the liquid refrigerant entering the evaporator 11 is controlled by the frequency conversion and throttling regulation of the fluorine circulating pump 9 and the flow control component 10, so that the evaporation heat exchange quantity is controlled, and the risk of excessive indoor side air condensate water or freezing caused by the excessively low outdoor temperature is reduced.
In addition, still can be connected controller and circulating fan 24 electricity, through reducing circulating fan 24 rotational speed, reduce outdoor crosswind amount of wind to the temperature rise degree of control outdoor crosswind, need to pay attention to and guarantee that the outdoor crosswind after being heated still is less than indoor crosswind before getting into first heat exchange core 16, and then can cool off indoor crosswind through first heat exchange core 16.
This embodiment passes through fluorine pump refrigerating system, at extremely low temperature, with the evaporimeter 11 to the heat absorption of indoor crosswind, the heat shifts to condenser 6 and heats outdoor crosswind, thereby solve the inboard condensation of heat transfer core or freeze the scheduling problem, its ingenious point lies in, the heat is got from the indoor crosswind that needs the cooling, make indoor crosswind accomplish once cooling before not having the heat transfer core, promote the low temperature refrigeration efficiency, the heat is used for the outdoor crosswind that needs to raise the temperature extremely low temperature again, solve the inboard condensation of heat transfer core or freeze the problem, when both protecting the heat transfer core, unit refrigerating capacity and operating efficiency have been improved again, and realize highly utilizing of the energy.
Also, in the present embodiment, the concept of the fluorine pump refrigeration system is not limited to be applied to the specific air flow passage shown in fig. 2, and can also be applied to the existing general indirect evaporative cooling air conditioning unit. When the method is applied to other universal indirect evaporative cooling air conditioning units, only the embodiment is needed to be referred, the condenser 6 is arranged at the air inlet on the outdoor side, the evaporator 11 is arranged at the air inlet on the indoor side, and the air inlet and the evaporator are communicated through the fluorine circulating pump 9 and the flow control part 10 to form a loop.
Further, referring to fig. 1, the condenser 6 should be disposed on the side of the filter 8 away from the outdoor side intake vent 5, and the evaporator 11 should be disposed on the side of the filter 12 away from the indoor side intake vent 13 for protection.
When the fluorine pump refrigeration system and the two-stage spray system are provided at the same time, the following composite control method can be adopted:
after the fluorine pump refrigerating system is started, if the first temperature sensor 25 detects that the temperature of the air dry bulb before outdoor side air passes through the first heat exchange core 16 is higher than a set value T1(15 ℃), the first spraying system and the second spraying system are simultaneously started;
if the temperature of the air dry bulb before outdoor side air passes through the first heat exchange core 16 is detected to be lower than a set value T1(15 ℃), and the temperature of the air dry bulb before outdoor side air passes through the second heat exchange core 17 is detected to be higher than a set value T1(15 ℃), the first spraying system is closed, and the second spraying system is opened;
if the temperature of the air dry bulb before outdoor side air passes through the first heat exchange core 16 is detected to be less than a set value T1(15 ℃) and the temperature of the air dry bulb before the outdoor side air passes through the second heat exchange core 17 is detected to be less than a set value T1(15 ℃), the first spraying system and the second spraying system are closed simultaneously.
In addition, a compressor cold compensation system can be further provided, as shown in fig. 1, the compressor cold compensation system comprises a condenser 1 arranged in the outer air outlet cavity a2, an evaporator 22 arranged in the inner air outlet cavity B2, a compressor 19 and a throttle valve 2, and the condenser 1, the throttle valve 2, the compressor 19 and the evaporator 22 are sequentially connected through copper pipes to form the compressor cold compensation system.
The compressor 19 and the throttle valve 2 are respectively electrically connected with the controller, the first temperature sensor 25 and the second temperature sensor 26 are used for realizing cold supplement, specifically, when the first temperature sensor 25 detects that the dry bulb temperature and the wet bulb temperature of the outdoor environment are both high, the first spraying system and the second spraying system are controlled to be simultaneously started, and then if the second temperature sensor 26 detects that the indoor air temperature cannot be effectively reduced (for example, the indoor air temperature exceeds 35 ℃), the compressor refrigerating system is started.
The indirect evaporative cooling air conditioning unit of the embodiment has the following advantages as a whole:
1. the problems of condensation, freezing and water system freezing on the inner side of the unit heat exchange core body at extremely low temperature can be effectively solved:
at extremely low temperature, unit fluorine pump refrigerating system opens, the refrigerant is from the heat absorption of the 11 evaporation of indoor side evaporimeter, it is exothermic with outside air heating to shift to outdoor side condensation again, therefore can avoid the direct heat transfer of first heat exchange core 16 of outer air that crosses low, cause 16 inboard condensation of first heat exchange core or freeze the scheduling problem, outside air after the condenser 6 heating of fluorine pump refrigerating system is through first heat exchange core 16 and inboard air heat exchange back simultaneously, heated once more, contact with water system again, therefore can avoid water system freezing and cause the problem such as water pump, the water pipe, spare parts such as water tank frost crack.
2. The refrigerating capacity and the operating efficiency of the unit at extremely low temperature can be improved:
the adopted fluorine pump refrigeration technology is an efficient energy-saving refrigeration system utilizing a natural cold source, and the refrigeration efficiency is extremely high at low temperature, so that the refrigeration capacity and the operation efficiency of a unit can be improved by starting the fluorine pump refrigeration at low temperature, and the energy is saved;
3. adopt doublestage spraying system, can be for each other backup and can improve wet operating mode operating range:
the double-stage spraying mode is adopted, the outdoor temperature is high, when a certain spraying system fails, the other spraying system can be normally started, and therefore the refrigerating capacity of the unit is not reduced too much when the unit fails in the certain spraying system. Meanwhile, at a low temperature, after the outdoor low-temperature air exchanges heat with the indoor high-temperature air through the first heat exchange core 16, the outdoor air temperature rises. The air before entering the second heat exchange core 17 is already air with relatively high temperature, and at the moment, the second spraying system is started, so that the operation range of the wet working condition and the operation efficiency of the unit are further improved.
4. The water tank is in the environment of relative higher temperature all the time, can effectively solve the water tank problem of freezing, does not need the evacuation water to reduce the water waste:
after the outdoor air exchanges heat with the indoor air through the first heat exchange core body 16, the temperature of the outdoor air rises, and the water tank is positioned below the first heat exchange core body 16 and isolated from the external low-temperature air, so that the water tank is always positioned in a high-temperature environment, the freezing problem of a water system is avoided, meanwhile, the water in the water system is not discharged, and the waste of water resources can be effectively reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An indirect evaporative cooling air conditioning unit with energy-saving fluorine pump,
including locating the inside heat transfer core of unit casing, being used for carrying cold wind outdoor crosswind runner, being used for carrying hot-blast indoor crosswind runner, outdoor crosswind runner flows through the outdoor air passageway of heat transfer core, indoor crosswind runner flows through the indoor air passageway of heat transfer core, its characterized in that:
still include controller, fluorine circulating pump, flow control part, condenser, locate the evaporimeter in the indoor crosswind runner, the condenser is located the position between outdoor side air intake to the heat exchange core of outdoor crosswind runner, and condenser, fluorine circulating pump, flow control part, evaporimeter four form the return circuit through copper pipe connection, and fluorine circulating pump, flow control part electricity connection director respectively.
2. The fluorine pump energy-saving indirect evaporative cooling air conditioning unit as claimed in claim 1, wherein: the evaporator is positioned at the position between the indoor side air inlet and the heat exchange core body of the indoor side air flow channel.
3. The fluorine pump energy-saving indirect evaporative cooling air conditioning unit as claimed in claim 1, wherein: the flow control part is an expansion valve.
4. The fluorine pump energy-saving indirect evaporative cooling air conditioning unit as claimed in claim 1, wherein: and a circulating fan which supplies air towards an outdoor air outlet is arranged in the outdoor side air flow channel, and the circulating fan is electrically connected with the controller.
5. The fluorine pump energy-saving indirect evaporative cooling air conditioning unit as claimed in claim 1, wherein: still include two sets at least electric connection director's evaporative cooling system, every set evaporative cooling system all is equipped with the nozzle, and one of them set of evaporative cooling system's nozzle is located the position from outdoor side air intake to between the heat transfer core of outdoor crosswind runner, and is used for aiming at the heat transfer core sprays, and another set of evaporative cooling system's nozzle is located the position from heat transfer core to between the outdoor side air outlet of outdoor crosswind runner, and is used for aiming at the heat transfer core sprays.
6. The fluorine pump energy-saving indirect evaporative cooling air conditioning unit as claimed in claim 5, wherein: the heat exchanger also comprises a first temperature sensor and a second temperature sensor which are respectively and electrically connected with the controller, wherein the first temperature sensor is used for collecting the outdoor crosswind temperature before heat exchange of the heat exchange core body, and the second temperature sensor is used for collecting the outdoor crosswind temperature after heat exchange of the heat exchange core body.
7. The fluorine pump energy-saving indirect evaporative cooling air conditioning unit as claimed in claim 6, wherein: the first temperature sensor is positioned at a position between the condenser and the heat exchange core body of the outdoor side air flow channel.
8. The method for controlling an indirect evaporative cooling air conditioning unit as recited in any of claims 1 to 7 wherein the fluorine circulation pump is activated to extract heat from the indoor crosswind via the evaporator and to release heat from the outdoor crosswind via the condenser when the temperature of the outdoor crosswind before heat exchange by the heat exchange core is detected to be lower than a predetermined threshold.
9. The control method according to claim 8, wherein the rotation speed of a circulation fan which is located in the outdoor crosswind flow path and blows air toward the outdoor side air outlet is reduced to control the degree of temperature rise of the outdoor crosswind.
10. The control method according to claim 8, characterized in that the following steps are further performed after the fluorine circulation pump is started:
if the outdoor side air temperature before heat exchange of the heat exchange core is detected to be larger than a set value T1, spraying and radiating the heat exchange core in an outdoor side air flow passage before heat exchange of the heat exchange core, and also spraying and radiating the heat exchange core in an outdoor side air flow passage after heat exchange of the heat exchange core;
if the outdoor side air temperature before heat exchange of the heat exchange core is detected to be less than a set value T1 and the outdoor side air temperature after heat exchange of the heat exchange core is detected to be greater than a set value T1, the heat exchange core is sprayed and radiated only in an outdoor side air flow channel after heat exchange of the heat exchange core;
and if the outdoor crosswind temperature before heat exchange of the heat exchange core is detected to be less than a set value T1 and the outdoor crosswind temperature after heat exchange of the heat exchange core is detected to be less than a set value T1, the heat exchange core is not sprayed and radiated.
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| CN111594962B (en) | 2024-05-28 |
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