CN113739599A - Cooling system - Google Patents
Cooling system Download PDFInfo
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- CN113739599A CN113739599A CN202010470405.7A CN202010470405A CN113739599A CN 113739599 A CN113739599 A CN 113739599A CN 202010470405 A CN202010470405 A CN 202010470405A CN 113739599 A CN113739599 A CN 113739599A
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- heat exchanger
- pipe
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- cooling system
- fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/103—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
- F28D5/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a cooling system, relates to the technical field of air conditioning, and aims to solve the problem that the outer surface of a heat exchanger of an outdoor unit is easy to scale and cannot be cooled. The invention provides a cooling system, which comprises an indoor unit and an outdoor unit, wherein the outdoor unit comprises a shell, a compressor, a double-pipe heat exchanger, a second heat exchanger, an atomization spraying device and a fan, an air inlet and an air outlet are formed in the shell, two ends of an inner pipe of the double-pipe heat exchanger are respectively communicated with the first heat exchanger and the compressor to form a refrigerant circulation heat exchange loop, the second heat exchanger is communicated with an outer pipe of the double-pipe heat exchanger to form a water circulation loop, the atomization spraying device is arranged above the double-pipe heat exchanger, a spraying opening is formed in one side, close to the double-pipe heat exchanger, of the atomization spraying device, and the fan is used for introducing air flow from the air inlet, flowing through the double-pipe heat exchanger and sending out from the air outlet. The invention is used for air conditioning.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a cooling system.
Background
At present, with innovation and development of distributed computing architectures such as artificial intelligence, cloud computing and big data, the data center serving as an information infrastructure bears larger and larger computing amount and has higher and higher requirements on computing efficiency, and accordingly, the power density of a single cabinet of the data center is continuously increased, and the heat dissipation capacity of a machine room is increased.
In the prior art, in order to deal with the environmental pressure of a machine room, an outdoor unit generally adopts an evaporation refrigeration mode to dissipate heat, that is, high-efficiency heat dissipation of a heat exchanger is realized by spraying water to the surface of the heat exchanger included in the outdoor unit, the spraying water exchanges latent heat and sensible heat with a refrigerant in the heat exchanger through a pipe wall, and the heat dissipation efficiency is high.
However, when the temperature of the outdoor heat exchanger is too high, the shower water drops on the surface of the heat exchanger and evaporates instantaneously, and only latent heat exchange is performed, so that impurities in the water are retained on the outer surface of the heat exchanger, and scale is accumulated on the outer surface of the heat exchanger, which seriously affects the heat exchange performance of the coil.
Disclosure of Invention
Embodiments of the present invention provide a cooling system to solve the problem that the outer surface of a heat exchanger of an outdoor unit is easily scaled and thus cannot be cooled.
To achieve the above object, an embodiment of the present invention provides a cooling system including an indoor unit and an outdoor unit, wherein the indoor unit includes a first heat exchanger, and the outdoor unit includes: the air conditioner comprises a shell, wherein an air inlet and an air outlet are formed in the shell; a compressor; the two ends of the inner pipe of the double-pipe heat exchanger are respectively communicated with the first heat exchanger and the compressor to form a refrigerant circulating heat exchange loop; the second heat exchanger is communicated with the outer pipe of the double-pipe heat exchanger to form a water circulation loop; the atomization spraying device is arranged above the double-pipe heat exchanger, and a spraying port is formed in one side, close to the double-pipe heat exchanger, of the atomization spraying device; and the fan is used for introducing airflow from the air inlet, flowing through the sleeve heat exchanger and sending the airflow out from the air outlet.
In the cooling system provided by the embodiment of the invention, two ends of an inner pipe of the double-pipe heat exchanger of the outdoor unit are respectively communicated with the compressor and the first heat exchanger of the indoor unit to form a refrigerant circulation heat exchange loop, and an outer pipe of the double-pipe heat exchanger of the outdoor unit is communicated with the second heat exchanger to form a water circulation loop. In this way, the refrigerant in the inner pipe of the double-pipe heat exchanger and the water in the outer pipe of the double-pipe heat exchanger perform sensible heat exchange through the pipe wall, the water in the outer pipe of the double-pipe heat exchanger and the water sprayed by the atomization spraying device perform sensible heat and latent heat exchange through the pipe wall, the structure is simple, and the heat dissipation efficiency is high. Compared with the prior art, the cooling system provided by the embodiment of the invention has the advantages that the double-pipe heat exchanger is utilized to exchange sensible heat between the refrigerant in the inner pipe and the water in the outer pipe, and then exchange sensible heat and latent heat between the refrigerant and the sprayed water of the atomization spraying device, so that the problem that the outer surface of the heat exchanger of the outdoor unit is easy to scale due to the fact that the high-temperature refrigerant directly exchanges heat with the sprayed water of the atomization spraying device is solved, and the operation of the system is safer and more reliable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a connection portion between a double pipe heat exchanger of an outdoor unit and an indoor unit of a cooling system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a connection portion between a double pipe heat exchanger and a second heat exchanger of an outdoor unit of a cooling system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cooling system provided with a cleaning device at a double-pipe heat exchanger according to an embodiment of the present invention;
fig. 4 is a top view of fig. 3.
Reference numerals:
1-a double-tube heat exchanger group; 10-double pipe heat exchanger; 11-a first valve; 2-redundant double-pipe heat exchanger group; 20-redundant double pipe heat exchangers; 21-a second valve; 30-an atomization spraying device; 40-a fan; 41-redundant fan; 50-a water storage tank; 51-a first conduit; 52-first circulation pump; 53-water replenishing pipe; 60-water spraying filler; 70-vertical chutes; 71-cleaning brush row; 711-a frame; 712-a brush; 80-a second heat exchanger; 82-second circulation pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
An embodiment of the present invention provides a cooling system, as shown in fig. 1 and fig. 2, including an indoor unit and an outdoor unit, where the indoor unit includes a first heat exchanger (a part of the indoor unit is not shown in fig. 1), and the outdoor unit includes: the air conditioner comprises a shell, wherein an air inlet and an air outlet are formed in the shell; a compressor; the double-pipe heat exchanger 10 is characterized in that two ends of an inner pipe of the double-pipe heat exchanger 10 are respectively communicated with the first heat exchanger and the compressor to form a refrigerant circulating heat exchange loop; the second heat exchanger 80, the second heat exchanger 80 communicates with the outer tube of the double-tube heat exchanger 10 to form a water circulation loop; the atomization spraying device 30 is arranged above the double-pipe heat exchanger 10, and a spraying port is formed in one side, close to the double-pipe heat exchanger 10, of the atomization spraying device 30; and the fan 40 is used for introducing airflow from the air inlet, flowing through the double-pipe heat exchanger 10 and sending the airflow out from the air outlet.
As shown in fig. 1 and 2, in the cooling system according to the embodiment of the present invention, two ends of an inner tube of a double-tube heat exchanger of the outdoor unit are respectively communicated with the compressor and a first heat exchanger of the indoor unit to form a refrigerant circulation heat exchange loop, and an outer tube of the double-tube heat exchanger of the outdoor unit is communicated with a second heat exchanger to form a water circulation loop. In this way, the refrigerant in the inner pipe of the double-pipe heat exchanger and the water in the outer pipe of the double-pipe heat exchanger perform sensible heat exchange through the pipe wall, the water in the outer pipe of the double-pipe heat exchanger and the water sprayed by the atomization spraying device perform sensible heat and latent heat exchange through the pipe wall, the structure is simple, and the heat dissipation efficiency is high. Compared with the prior art, the cooling system provided by the embodiment of the invention has the advantages that the double-pipe heat exchanger is utilized to exchange sensible heat between the refrigerant in the inner pipe and the water in the outer pipe, and then exchange sensible heat and latent heat between the refrigerant and the sprayed water of the atomization spraying device, so that the problem that the outer surface of the heat exchanger of the outdoor unit is easy to scale due to the fact that the high-temperature refrigerant directly exchanges heat with the sprayed water of the atomization spraying device is solved, and the operation of the system is safer and more reliable.
It should be noted that, when the cooling system has a plurality of indoor units, the outdoor unit can be connected to the plurality of indoor units at the same time, and the cooling system has a simple structure and a low cost. It will be appreciated that a second circulation pump 81 is typically provided on the water circulation circuit to ensure proper operation of the water circulation circuit. In addition, the outer tube of the double tube heat exchanger 10 is usually made of hydrophilic film heat exchange material. Illustratively, the outer tube of the double-tube heat exchanger 10 is a hydrophilic aluminum foil coil. Like this, the shower water can scatter rapidly on hydrophilic aluminium foil, can not condense into the drop of water, increase heat exchange area for heat transfer speed, simultaneously, the outer tube surface moisture evaporation of double-pipe heat exchanger 10 is very fast, and difficult corruption is ageing. Optionally, the number of the double-pipe heat exchangers 10 may be multiple, and a plurality of the double-pipe heat exchangers 10 are arranged in parallel to form the double-pipe heat exchanger group 1, so that the heat exchange efficiency of the outdoor unit can be greatly improved.
The flow directions of the refrigerant in the inner tube of the double-tube heat exchanger 10 and the water in the outer tube are opposite, and the heat exchange efficiency of the refrigerant in the inner tube of the double-tube heat exchanger 10 and the water in the outer tube is high.
Here, in order to further improve the service life of the double pipe heat exchanger 10, the quality of the shower water may be controlled. For example, the pH of the spray water should meet preset requirements, and illustratively, the pH of the spray water is greater than 6.5 and less than 8.0. Preferably, the spray water is pure water, the outer tube of the double-tube heat exchanger 10 is not easy to corrode, and the service life is longer.
Referring to fig. 2, in order to recycle the energy of the system, a heat conducting partition is disposed in the second heat exchanger 80, so that the interior of the second heat exchanger 80 is divided into a first fluid channel and a second fluid channel; the first fluid channel is communicated with the outer pipe of the double-pipe heat exchanger 10 to form a water circulation loop; an inlet of the second fluid channel is communicated with a hot water supply pipe, and an outlet of the second fluid channel is communicated with a hot water return pipe. At this moment, the water in the first fluid passage can exchange heat with the drinking water in the second fluid passage, and heat energy is transferred to the drinking water, so that the energy recycling rate is improved. The flow directions of the water in the first fluid channel and the water in the second fluid channel of the second heat exchanger 80 are opposite, and the heat exchange efficiency is high. Here, the second heat exchanger 80 may also be a double pipe heat exchanger, and generally, the outer pipe is a first fluid passage, and the inner pipe is a second fluid passage, which is not limited herein.
In order to further improve the energy cycle utilization rate, reduce the energy loss and reduce the energy consumption of the system, connecting pipelines among a plurality of components in the cooling system are all heat insulation pipes so as to reduce the energy loss caused by indirect heat exchange between the refrigerant in the refrigerant circulation loop and the water in the water circulation loop when the refrigerant and the water flow in the connecting pipelines.
In order to recycle the spray water, referring to fig. 1, a water storage tank 50 is disposed at the bottom of the outdoor unit, the water storage tank 50 is communicated with the atomizing and spraying device 30 through a first pipeline 51, and a first circulation pump 52 is disposed on the first pipeline 51. In this case, the water used by the atomizing spray device 30 can be recycled, thereby reducing resource waste and reducing operation cost. In one possible embodiment, a water spraying filler 60 is disposed between the atomizing spray device 30 and the double-pipe heat exchanger 10, so that the water spraying is uniformly sprayed on the outer surface of the double-pipe heat exchanger 10, and the double-pipe heat exchanger 10 has a good heat exchange effect.
Further, in order to ensure the normal operation of the outdoor unit, the water storage tank 50 of the outdoor unit is communicated with a water source through a water replenishing pipe 53. When the atomization spraying device 30 in the outdoor unit works, spray water is lost, in order to guarantee continuous supply of water, water can be regularly supplemented into the water storage tank 50 through the water supplementing pipe 53, and then normal operation of the atomization spraying device 30 in the outdoor unit can be guaranteed.
As shown in fig. 1, the fan 40 of the outdoor unit is disposed above the atomizing spray device 30 to prevent water sprayed from the atomizing spray device 30 from entering the fan 40, and further damage to the fan 40 is avoided, and the reliability of the system is higher. Similarly, the redundant fan 41 is disposed above the atomizing spray device 30. In addition, the fan 40 is a variable frequency fan. Therefore, when the heat dissipation load of the system is large, the rotating speed of the fan 40 is in a high rotating speed state, so that high heat exchange efficiency is ensured, and the stability of the system is high; when the heat dissipation load of the system is small, the rotating speed of the fan 40 is in a low rotating speed state, so that the energy consumption is reduced, and the operation cost is low. Illustratively, the fan 40 is an EC (electrical Commutation) fan.
It should be understood that the components inside the outdoor unit need to be cleaned and maintained periodically, and in order to implement maintenance without shutdown, the outdoor unit further includes a redundant component system including a redundant double-pipe heat exchanger 20 forming a backup with the double-pipe heat exchanger 10 and a redundant fan 41 forming a backup with the fan 40, the inlet and the outlet of the double-pipe heat exchanger 10 are provided with the first valve 11, and the inlet and the outlet of the redundant double-pipe heat exchanger 20 are provided with the second valve 21. Of course, the redundant component system may further include a redundant first circulation pump, a redundant second heat exchanger, and the like, which are not illustrated here. In this case, when fan 40 is damaged or needs to be serviced, redundant fan 41 may be activated; by controlling the opening or closing of the first valve 11 and the second valve 21, the redundant double pipe heat exchanger 20 can be activated when the double pipe heat exchanger 10 is damaged or needs to be serviced; therefore, even if the fan 40 or the double pipe heat exchanger 10 is damaged accidentally, the components included in the redundant component system can still be used for working, meanwhile, the maintenance can be carried out under the condition that the outdoor unit is continuously operated, and the system is safer and more reliable. The first valve 11 and the second valve 21 may be electronic expansion valves, and are not limited herein.
The redundant double pipe heat exchanger 20 and the double pipe heat exchanger 10 may be installed at the same horizontal level, in the left-right direction, or in the vertical direction. When the above-mentioned double-pipe heat exchanger 10 is plural to constitute the double-pipe heat exchanger group 1, the redundant double-pipe heat exchanger 20 is also plural to constitute the redundant double-pipe heat exchanger group 2. In general, the redundant double pipe heat exchanger 20 is vertically installed in the same vertical direction as the double pipe heat exchanger 10, and the entire outdoor unit occupies a small area. In addition, when there are many indoor units connected to the outdoor unit, the redundant casing heat exchanger 20 and the casing heat exchanger 10, and the fan 40 and the redundant fan 41 can be simultaneously started, so as to increase the heat exchange area and the air discharge speed, thereby improving the heat dissipation efficiency.
It should be understood that the operation mode of the backup component included in the redundant component system is completely consistent with the operation mode of the original component, the connection relationship between the backup component included in the redundant component system and other components in the system is completely consistent with the connection relationship between the original component and other components in the system, the following description of the original component is also applicable to the backup component included in the redundant component system, and only the original component is specifically described below.
It should be understood that after a long time of use, the double pipe heat exchanger 10 of the outdoor unit may be scaled, and the double pipe heat exchanger 10 still needs to be cleaned, and in order to implement automatic on-line cleaning, as shown in fig. 3 and 4, the outdoor unit further includes an automatic cleaning device for cleaning the outer surface of the double pipe heat exchanger 10. At this moment, utilize self-cleaning device can online self-cleaning double pipe heat exchanger 10's surface, avoided shutting down the maintenance and the manual work dismantles double pipe heat exchanger 10, can realize manual control, equipment self-cleaning, solve the problem of dismantling repeatedly and installing, reduce washing working strength, improve washing work efficiency, extension equipment life.
The automatic cleaning device is not unique in structure, and can be cleaned by moving a brush or washed by high-pressure water flow. Illustratively, referring to fig. 3 and 4, the automatic cleaning device comprises vertical chutes 70, a driving device and a cleaning brush row 71, wherein the vertical chutes 70 are arranged at two opposite sides inside the casing, and racks are arranged in the vertical chutes 70; the cleaning brush row 71 comprises a frame 711 and a brush 712 positioned in the frame 711, wherein gears are arranged on two opposite sides of the frame 711 and are meshed with racks; the double pipe heat exchanger 10 is positioned in the frame 711 and is mutually extruded with the brush 712; the driving device is electrically connected with the gear, and the driving device is used for driving the gear to move along the vertical sliding chute so as to drive the brushes 712 of the cleaning brush row 71 to move up and down along the outer surface of the double-pipe heat exchanger 10. Based on this, when the double-pipe heat exchanger 10 needs to be cleaned, only the driving device needs to be started, and the outer surface of the double-pipe heat exchanger 10 can be automatically cleaned on line through the up-and-down movement of the brush 712, so that the double-pipe heat exchanger 10 does not need to be disassembled manually, and the outdoor unit does not need to stop working, thereby saving time and labor. The material of the brush 712 is hard, for example, the material of the brush 712 is plastic.
In order to reduce the operation cost, the cooling system of the embodiment of the invention further includes an outdoor temperature sensor and a control unit, the outdoor temperature sensor is used for detecting the outdoor temperature, the control unit is electrically connected with the outdoor temperature sensor, and the control unit can open or close the atomization spraying device 30, the first circulating pump 52, the fan 40, the first valve 11 and the second valve 21, and increase or decrease the power of the fan 40 and the first circulating pump 52 according to the outdoor temperature detected by the outdoor temperature sensor. The control unit may be a set of a plurality of controllers, or may be a single controller, which is not limited herein.
For example, when the outdoor temperature is lower than the first temperature, the control unit controls the redundant fan 41, the first circulation pump 52, the atomization spray device 30 and the second valve 21 to be closed, and controls the fan 40 and the first valve 11 to be opened. At this time, the heat dissipation of the double pipe heat exchanger 10 in the cooling system can meet the requirement only by using sensible heat exchange, the atomizing spray device 30 and the first circulating pump 52 do not need to be started, only the fan 40 needs to be operated, and the operation cost is low.
For another example, when the outdoor temperature is higher than the first temperature and lower than the second temperature, the heat dissipation of the double pipe heat exchanger 10 is not stable enough to meet the heat dissipation requirement of the cooling system only by using sensible heat exchange, and the control unit controls the redundant fan 41, the second valve 21 to be closed, and controls the first circulation pump 52, the atomizing spray device 30, the fan 40, and the first valve 11 to be opened. At this moment, the evaporative cooling of the spray water is utilized for the heat dissipation of the double-pipe heat exchanger 10 in the cooling system, the spray water and the double-pipe heat exchanger 10 are subjected to heat exchange to realize cooling, the heat dissipation performance is better, the heat dissipation is faster, and the system runs more stably and reliably for a long time. The first temperature and the second temperature may be set according to actual conditions, and are not limited herein.
It should be noted that, the redundant component systems are all electrically connected to the control unit, and whether the redundant component systems are started or not can be manually operated or automatically controlled. For example, whether the redundant component system is started or not is automatically controlled by the control unit. Specifically, the outdoor unit further comprises an alarm, the alarm is electrically connected with the control unit and used for detecting whether an original component in the outdoor unit fails or not, if the original component fails, an alarm is sent out, and the control unit controls the starting of a standby component. Illustratively, when the double-pipe heat exchanger 10 fails, the alarm gives an audible and visual alarm and sends double-pipe heat exchanger failure alarm information to the control unit, and the control unit controls the first valve 11 to be closed and controls the second valve 21 to be opened according to the double-pipe heat exchanger failure alarm information.
Therefore, the cooling system provided by the embodiment of the invention can realize an automatic control process and multi-working-condition operation, reduce the labor cost, maximally utilize natural resources and reduce the operation cost.
Referring to fig. 1 and 2, the outdoor unit of the cooling system according to the embodiment of the present invention further includes a condensing pressure sensor, and the refrigerant pressure sensor is configured to detect a refrigerant pressure at a refrigerant outlet of the inner tube of the double tube heat exchanger 10 and output refrigerant pressure information; the refrigerant pressure sensor is electrically connected with the control unit, and the control unit can increase or decrease the power of the fan according to the refrigerant pressure information. For example, when the detected refrigerant pressure is lower than a first preset refrigerant pressure, the control unit controls the power of the fan 40 to be reduced, the fan 40 is operated in a low-power mode, and even the fan 40 is controlled to stop operating, so that the noise is low and the energy consumption is low; for another example, when the detected refrigerant pressure is higher than the second preset refrigerant pressure, the control unit controls the power of the fan 40 to be increased, and operates in a high power or full power mode to reduce the condensing pressure. The first preset refrigerant pressure and the second preset refrigerant pressure may be set according to actual conditions, and for example, the first preset refrigerant pressure is 1.62MPa, and the second preset condensing pressure is 2.06MPa, which is not limited herein.
It can be understood that, in order to avoid the scale formation on the outer surface of the double-pipe heat exchanger 10 after the water evaporation, it should be ensured that a continuous water film is formed on the outer surface of the double-pipe heat exchanger 10, and the thickness of the water film should not be too thin; in order to ensure that the spray water on the outer surface of the double-pipe heat exchanger 10 can evaporate quickly, the thickness of the water film is not too thick; experiments prove that the thickness of the water film is usually 0.3-0.8 mm, spray water on the outer surface of the double-pipe heat exchanger 10 can be quickly evaporated, the heat exchange efficiency is high, and the risk of scaling of the spray water on the outer surface of the double-pipe heat exchanger 10 is low.
Wherein, in order to realize the control that becomes more meticulous to the thickness of above-mentioned water film, the surface of double-pipe heat exchanger 10 is equipped with the water film detector, and the water film detector is connected with the control unit electricity, and the control unit can rise or reduce first circulating pump 52's power according to the detection information of water film detector to make the water film of the surface of double-pipe heat exchanger 10 satisfy the requirement. For example, when the thickness of the detected water film of the water film detector is less than 0.3mm, the control unit controls the power of the first circulation pump 52 to be increased so that the spray amount of the spray water of the atomizing spray device 30 is increased; for another example, when the thickness of the detected water film of the water film probe is greater than 0.8mm, the control unit controls the power of the first circulation pump 52 to be reduced so that the spray amount of the spray water of the atomizing spray device 30 is reduced.
In order to improve the stability and the safety of the operation of the cooling system, the cooling system provided by the embodiment of the invention further comprises a liquid storage tank, wherein the liquid storage tank is arranged on a pipeline of the refrigerant circulation loop, and the liquid storage tank is used for supplementing the refrigerant in the refrigerant circulation loop. Therefore, when the refrigerant in the cooling system is insufficient in leakage, the refrigerant in the cooling system can be supplemented by the liquid storage tank, and the stability and the safety of the operation of the cooling system are improved.
It will be appreciated that the first and second heat exchangers are not of the only kind. For example, the first heat exchanger is a plate heat exchanger, and the second heat exchanger is a plate heat exchanger; for another example, the first heat exchanger is a tube heat exchanger and the second heat exchanger is a tube heat exchanger. Compared with a tubular heat exchanger, the plate heat exchanger has the advantages of higher heat transfer efficiency, smaller volume, smaller occupied area, simple structure, easiness in carrying and installation, flexibility in heat adjustment, capability of increasing plates along with the increase of heat exchange requirements without replacing any equipment; for this reason, the first heat exchanger and the second heat exchanger are generally plate heat exchangers.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A cooling system comprising an indoor unit and an outdoor unit, the indoor unit including a first heat exchanger, the outdoor unit comprising:
the air conditioner comprises a shell, wherein an air inlet and an air outlet are formed in the shell;
a compressor;
the two ends of the inner pipe of the double-pipe heat exchanger are respectively communicated with the first heat exchanger and the compressor to form a refrigerant circulating heat exchange loop;
the second heat exchanger is communicated with the outer pipe of the double-pipe heat exchanger to form a water circulation loop;
the atomization spraying device is arranged above the double-pipe heat exchanger, and a spraying port is formed in one side, close to the double-pipe heat exchanger, of the atomization spraying device;
and the fan is used for introducing airflow from the air inlet, flowing through the sleeve heat exchanger and sending the airflow out from the air outlet.
2. The cooling system of claim 1, wherein a thermally conductive partition is disposed within the second heat exchanger to divide the second heat exchanger into a first fluid passage and a second fluid passage; the first fluid channel is communicated with the outer pipe of the double-pipe heat exchanger to form a water circulation loop; an inlet of the second fluid channel is communicated with a hot water supply pipe, and an outlet of the second fluid channel is communicated with a hot water return pipe.
3. The cooling system of claim 2, wherein the connecting duct is an insulated pipe.
4. The cooling system of claim 1, wherein the fan is a variable frequency fan.
5. The cooling system of claim 1, wherein a water storage tank is disposed at a bottom of the outdoor unit, the water storage tank is communicated with the atomizing and spraying device through a first pipeline, and a first circulating pump is disposed on the first pipeline.
6. The cooling system of claim 5, wherein the outdoor unit further comprises a redundant component system, the redundant component system comprises a redundant casing heat exchanger backed up by the casing heat exchanger and a redundant fan backed up by the fan, the casing heat exchanger has an inlet and an outlet both provided with a first valve, and the redundant casing heat exchanger has an inlet and an outlet both provided with a second valve.
7. The cooling system of claim 6, wherein the outdoor unit further comprises:
an outdoor temperature sensor for detecting an outdoor temperature;
the control unit is electrically connected with the outdoor temperature sensor and can open or close the atomization spraying device, the first circulating pump, the fan, the first valve and the second valve according to the outdoor temperature detected by the outdoor temperature sensor, and the power of the fan and the first circulating pump is increased or reduced.
8. The cooling system of claim 7, wherein the outdoor unit further comprises: the refrigerant pressure sensor is used for detecting the refrigerant pressure at a refrigerant outlet of the inner pipe of the double-pipe heat exchanger and outputting refrigerant pressure information;
the refrigerant pressure sensor is electrically connected with the control unit, and the control unit can increase or decrease the power of the fan according to the refrigerant pressure information.
9. The cooling system according to claim 8, wherein the outer surface of the double-pipe heat exchanger is provided with a water film probe, the water film probe is electrically connected with the control unit, and the control unit can increase or decrease the power of the first circulation pump according to the detection information of the water film probe.
10. The cooling system according to any one of claims 1 to 9, further comprising a liquid storage tank disposed on a pipe of the refrigerant circulation circuit, the liquid storage tank being configured to supplement the refrigerant into the refrigerant circulation circuit.
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| CN202010470405.7A CN113739599A (en) | 2020-05-28 | 2020-05-28 | Cooling system |
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| CN202010470405.7A CN113739599A (en) | 2020-05-28 | 2020-05-28 | Cooling system |
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