CN111156615A - Controller heat dissipation system based on two-stage compressor system and control method thereof - Google Patents
Controller heat dissipation system based on two-stage compressor system and control method thereof Download PDFInfo
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- CN111156615A CN111156615A CN202010054967.3A CN202010054967A CN111156615A CN 111156615 A CN111156615 A CN 111156615A CN 202010054967 A CN202010054967 A CN 202010054967A CN 111156615 A CN111156615 A CN 111156615A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 197
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003507 refrigerant Substances 0.000 claims abstract description 88
- 238000001816 cooling Methods 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 13
- 238000004378 air conditioning Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 abstract description 16
- 230000005494 condensation Effects 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 12
- 230000005855 radiation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010257 thawing 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
- 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
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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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
- 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
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F13/22—Means for preventing condensation or evacuating condensate
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a controller heat radiation system based on a double-stage compressor system and a control method thereof, which are applied to the double-stage compressor system, wherein the system comprises: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch line is connected with an air outlet of the two-stage compressor, and the other end of the first branch line is connected with an inlet of the heat exchanger and used for introducing a refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for dissipating heat of the heat dissipation module through the heat dissipation module of the controller. The invention solves the problem that the condensation of the controller module can be caused by the refrigerant heat dissipation technology in the prior art, avoids the condensation and simultaneously improves the reliability of the controller.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a controller heat dissipation system based on a double-stage compressor system and a control method thereof.
Background
With the global further warming, the environmental temperature is continuously rising, the time of hot weather with high temperature in summer is more and more lasting, and the severe high-temperature environment is extremely unfavorable for the whole machine operation reliability of the variable frequency air conditioner. Meanwhile, the related export areas, such as the middle east, have higher ambient temperature, and in order to ensure that the components of the controller module reduce heat generation, the down-conversion air conditioner generally reduces the temperature of the electronic control module in a manner of reducing the refrigeration operation frequency in a high-temperature environment. However, when the operating frequency is reduced, the cooling capacity is also reduced a lot. In order to improve the refrigerating capacity under the high-temperature condition, a double-stage compression technology can be adopted at present, meanwhile, the controller components dissipate heat, the temperature of the outdoor unit controller module components is reduced by adopting a refrigerant heat dissipation technology, high-frequency operation can be realized during refrigeration, higher refrigerating capacity can be obtained, and the running reliability of outdoor unit electric control is improved.
Aiming at the problem that condensation is generated on a controller module due to a refrigerant heat dissipation technology in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The invention provides a controller heat dissipation system based on a two-stage compressor system and a control method thereof, which at least solve the problem that a controller module generates condensation due to a refrigerant heat dissipation technology in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a controller heat dissipation system for a dual-stage compressor system, including: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch line is connected with an air outlet of the two-stage compressor 9, and the other end of the first branch line is connected with an inlet of the heat exchanger and used for introducing a refrigerant discharged by the two-stage compressor 9 into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator 2, and the second branch is used for dissipating heat of the heat dissipation module 16 through the heat dissipation module 16 of the controller.
Further, the heat exchanger is a U-shaped tube at the bottom of the condenser 14; wherein, the number of the U-shaped pipes is one or more.
Further, the system further comprises: and the throttling element 17 is positioned between the heat dissipation module 16 and the flash evaporator 2 and is used for controlling the on-off of a refrigerant heat dissipation pipeline.
Further, the system further comprises: and the air cooling module is connected with the heat dissipation module 16 and used for dissipating heat of the heat dissipation module 16 through air current.
According to another aspect of the embodiments of the present invention, there is provided a controller heat dissipation control method applied to the controller heat dissipation system, including: after the unit is started for a preset time, detecting the ambient temperature and the running frequency of a compressor; determining a heat dissipation mode of the controller according to the ambient temperature and/or the running frequency of the compressor; and radiating the controller according to the radiating mode.
Further, determining a heat dissipation mode of the controller according to the ambient temperature and/or the operating frequency of the compressor includes: acquiring an operation mode of a unit; the operation mode at least comprises a heating mode and a cooling mode; when the operation mode of the unit is a refrigeration mode, determining a heat dissipation mode of the controller according to the ambient temperature and the operation frequency of the compressor; when the operation mode of the unit is a heating mode, determining a heat dissipation mode of the controller according to the operation frequency of the compressor; the heat dissipation mode at least comprises refrigerant heat dissipation and air cooling heat dissipation.
Further, determining a heat dissipation mode of the controller according to the ambient temperature and the operating frequency of the compressor includes: judging whether the ambient temperature is greater than or equal to a first preset temperature or not and whether the running frequency of the compressor is greater than or equal to a preset frequency or not; if the ambient temperature is greater than or equal to a first preset temperature and the operating frequency of the compressor is greater than or equal to a preset frequency, determining that the heat dissipation mode is refrigerant heat dissipation; otherwise, determining the heat dissipation mode as air-cooled heat dissipation.
Further, determining a heat dissipation mode of the controller according to the operating frequency of the compressor includes: judging whether the running frequency of the compressor is greater than or equal to a preset frequency or not; if the operating frequency of the compressor is greater than or equal to the preset frequency, determining that the heat dissipation mode is refrigerant heat dissipation; otherwise, determining the heat dissipation mode as air-cooled heat dissipation.
Further, the controller is radiated according to the radiating mode, and the method comprises the following steps: when the heat dissipation mode is refrigerant heat dissipation, opening a throttling element of a refrigerant heat dissipation pipeline, adjusting the throttling element to a first preset opening degree, and dissipating heat of the controller through the refrigerant; and when the heat dissipation mode is air cooling heat dissipation, the air cooling module is started, and the controller is cooled through air flow.
Further, open the throttling element of refrigerant heat dissipation pipeline to after adjusting to first preset aperture, still include: detecting the temperature of the controller; judging the load state of the controller according to the temperature of the controller; the opening of the restriction element is controlled in dependence on the load situation.
Further, the load conditions include at least a high load condition and a limit load condition; the method for judging the load state of the controller according to the temperature of the controller comprises the following steps: when the temperature of the controller is greater than or equal to a second preset temperature and less than or equal to a third preset temperature, determining that the load state of the controller is a high load state; wherein the third preset temperature is higher than the second preset temperature; and when the temperature of the controller is higher than the third preset temperature, determining the load state of the controller as the limit load state.
Further, controlling the opening degree of the throttling element according to the load state includes: when the load state is a high load state, increasing the opening degree of the throttling element to a second preset opening degree; and when the load state is the limit load state, adjusting the opening degree of the throttling element to the maximum opening degree.
Further, after adjusting the opening degree of the throttling element to the maximum opening degree, the method further comprises the following steps: after the preset waiting time, detecting the current temperature of the controller again; and if the current temperature of the controller is higher than the third preset temperature, controlling the unit to enter shutdown protection.
According to another aspect of the embodiment of the invention, an air conditioning unit is provided, which comprises the controller heat dissipation system as described above, or adopts the controller heat dissipation control method as described above.
According to yet another aspect of embodiments of the present invention, there is provided a storage medium containing computer-executable instructions for performing the controller heat dissipation control method as described above when executed by a computer processor.
In the present invention, a novel controller heat dissipation system applied to a two-stage compressor system is provided, which includes: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch line is connected with an air outlet of the two-stage compressor, and the other end of the first branch line is connected with an inlet of the heat exchanger and used for introducing a refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for dissipating heat of the heat dissipation module through the heat dissipation module of the controller. In this way, the problem that condensation is generated on the controller module due to the fact that the refrigerant heat dissipation technology in the prior art can be effectively solved, condensation is avoided, meanwhile, enough refrigerating capacity is guaranteed when the refrigerant is adopted for heat dissipation, temperature change of the controller heat dissipation module is small when the refrigeration and heating modes are switched, and reliability of the controller is improved.
Drawings
Fig. 1 is an alternative structural schematic diagram of a controller heat dissipation system according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an alternative configuration of a controller heat dissipation system according to an embodiment of the present invention;
FIG. 3 is an alternative flow chart of a method for controlling heat dissipation in a controller according to an embodiment of the present invention; and
fig. 4 is another alternative flow chart of a controller heat dissipation control method according to an embodiment of the present invention.
Description of reference numerals:
1. a throttle valve 1; 2. a flash evaporator; 3. a throttle valve 2; 4. a filter; 5. an evaporator; 6. a fan; 7. a stop valve; 8. a filter; 9. a compressor; 10. a vapor-liquid separator; 11. a four-way valve; 12. a gas supplementing two-way valve; 13. a fan; 14. a condenser; 15. a filter; 16. a heat dissipation module; 17. a throttle valve 3; 18. the flow direction of the wind field; 19. an air-cooled module; 20. a drive module; 21. fastening screws; 22. a heat dissipation block 1; 23. a heat dissipation block 2; 24. an air suction port; 25. exhausting the refrigerant; 26. exhausting a refrigerant branch; 27. a main refrigerant flow path; 28. a condenser.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In preferred embodiment 1 of the present invention, a controller heat dissipation system is provided, which is applied to a dual-stage compressor system, and specifically, fig. 1 shows an alternative structural schematic diagram of the system, as shown in fig. 1, the system includes:
the refrigerant heat dissipation pipeline comprises a first branch and a second branch; wherein,
one end of the first branch line is connected with an air outlet of the two-stage compressor 9, and the other end of the first branch line is connected with an inlet of the heat exchanger and used for introducing a refrigerant discharged by the two-stage compressor 9 into the heat exchanger for heat exchange;
one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator 2, and the second branch is used for dissipating heat of the heat dissipation module 16 through the heat dissipation module 16 of the controller.
In the above embodiments, a novel controller heat dissipation system applied to a two-stage compressor system is provided, including: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch line is connected with an air outlet of the two-stage compressor, and the other end of the first branch line is connected with an inlet of the heat exchanger and used for introducing a refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for dissipating heat of the heat dissipation module through the heat dissipation module of the controller. In this way, the problem that condensation is generated on the controller module due to the fact that the refrigerant heat dissipation technology in the prior art can be effectively solved, condensation is avoided, meanwhile, enough refrigerating capacity is guaranteed when the refrigerant is adopted for heat dissipation, temperature change of the controller heat dissipation module is small when the refrigeration and heating modes are switched, and reliability of the controller is improved.
Because the traditional cooling medium heat dissipation mode can reduce the flow of the cooling medium, in order to avoid the problem, the heat exchanger adopts a U-shaped pipe at the bottom of the condenser 14; the number of the U-shaped pipes can be one or more according to the heat dissipation requirement. The U-shaped pipe at the bottom of the condenser can reduce the influence on a main refrigerant flow path, can ensure enough refrigerating capacity when the refrigerant is used for heat dissipation, can ensure the reliable operation of the whole machine under a high-temperature working condition, and simultaneously ensures that the whole machine continuously outputs higher refrigerating capacity at high temperature.
Preferably, the system further comprises: and the throttling element 17 is positioned between the heat dissipation module 16 and the flash evaporator 2 and is used for controlling the on-off of a refrigerant heat dissipation pipeline.
In the above embodiment, the inlet of the refrigerant heat dissipation pipeline is located at the exhaust port of the compressor, and before the four-way valve component, the refrigerant heat dissipation pipeline adopts the thin copper pipe, and a part of high-temperature and high-pressure refrigerant is led out through the thin copper pipe and enters the condenser separately, and a U branch at the bottom of the condenser is used, (the number of U pipes can be increased, so that the influence on the whole function is avoided to be large, and the number of U pipes can not be too much), so that a large condensation effect can be achieved, and defrosting is facilitated under the heating mode. After condensation, the refrigerant reaches a saturated state, enters the controller heat dissipation module and then enters the throttling element, the throttling element can be an electronic expansion valve, the temperature is reduced after throttling, the pressure is reduced, the refrigerant returns to the flash evaporator, and the refrigerant enters the whole cycle again after flash evaporation.
In the invention, except using a refrigerant for heat dissipation, an air cooling module is also reserved, fig. 2 shows an optional structural schematic diagram of the system, as shown in fig. 2, an air cooling module 19 comprises the following contents, 18 is an outer unit for guiding the air direction, the air cooling flow rate is increased through the rotation of an outer unit fan, the heat dissipation capacity of a fin heat exchanger of the air cooling module is ensured, 23 is composed of aluminum blocks, is tightly attached to the fin heat exchanger to form the same module, the heat exchange efficiency is ensured, 22 is also composed of aluminum blocks, is combined with 23 aluminum blocks, a copper pipe diameter space is reserved in the middle, and a copper pipe is wrapped by the aluminum blocks and is fixed by 21 fastening screws; wherein 20 is a driving module, which is embedded in the aluminum block to ensure smooth heat dissipation of the driving chip; and 24, the refrigerant returns to the flash tank after passing through the heat dissipation module. The air cooling module is connected with the heat dissipation module and used for dissipating heat of the heat dissipation module through air current. In addition, fig. 2 also shows a second branch of the refrigerant heat dissipation pipeline, that is, the refrigerant flowing out from the bottom of the condenser enters the heat sink to dissipate heat.
The air cooling module has no influence on a refrigerant flow path of the unit and does not occupy energy, so that the energy-saving effect can be achieved. The system simultaneously uses a refrigerant heat dissipation structure and an air-cooled heat dissipation structure, and when the load of the controller board block is low, an air-cooled mode is adopted, so that the loss of the refrigeration capacity of the system caused by heat dissipation by using a system refrigerant is avoided; when detecting that whole system controller module load is great, dispel the heat through the refrigerant, guarantee that the controller module is not harmd, and guarantee in the refrigerant flows into flash vessel, participate in the overall cycle, guarantee that the refrigerating output is sufficient, guarantee flash distillation tonifying qi effect simultaneously.
In conclusion, the system can apply the refrigerant heat dissipation technology to the temperature heat dissipation of the controller module of the two-stage compression system, and improves the reliability of the controller. The device can guarantee the reliable operation of the whole machine under the ultra-high temperature working condition, guarantee that the sample whole machine continuously outputs higher refrigerating output under high frequency, and can continuously stabilize the reliable operation.
Example 2
Based on the controller heat dissipation system provided in the above embodiment 1, a controller heat dissipation control method is provided in a preferred embodiment 2 of the present invention. Specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S302-S306:
s302: after the unit is started for a preset time, detecting the ambient temperature and the running frequency of a compressor;
s304: determining a heat dissipation mode of the controller according to the ambient temperature and/or the running frequency of the compressor;
s306: and radiating the controller according to the radiating mode.
In the above embodiment, a novel controller heat dissipation control method applied to a two-stage compressor system is provided, where after a unit is started for a preset time, an ambient temperature and a compressor operating frequency are detected, and a heat dissipation mode of a controller is determined according to the ambient temperature and/or the compressor operating frequency to dissipate heat. In this way, the problem that condensation is generated on the controller module due to the fact that the refrigerant heat dissipation technology in the prior art can be effectively solved, condensation is avoided, meanwhile, enough refrigerating capacity is guaranteed when the refrigerant is adopted for heat dissipation, temperature change of the controller heat dissipation module is small when the refrigeration and heating modes are switched, and reliability of the controller is improved.
And determining the heat dissipation mode by adopting different parameters according to different operation modes of the unit. The operation modes of the unit at least comprise a heating mode and a cooling mode; when the operation mode of the unit is a refrigeration mode, determining a heat dissipation mode of the controller according to the ambient temperature and the operation frequency of the compressor; when the operation mode of the unit is a heating mode, the temperature of the external environment is usually lower, and the heat dissipation mode of the controller is determined only according to the operation frequency of the compressor; the heat dissipation mode at least comprises refrigerant heat dissipation and air cooling heat dissipation.
Preferably, the determining the heat dissipation mode of the controller according to the ambient temperature and the operation frequency of the compressor includes: judging whether the ambient temperature is greater than or equal to a first preset temperature or not and whether the running frequency of the compressor is greater than or equal to a preset frequency or not; if the ambient temperature is greater than or equal to a first preset temperature and the operating frequency of the compressor is greater than or equal to a preset frequency, determining that the heat dissipation mode is refrigerant heat dissipation; otherwise, determining the heat dissipation mode as air-cooled heat dissipation. Further, determining a heat dissipation mode of the controller according to the operating frequency of the compressor includes: judging whether the running frequency of the compressor is greater than or equal to a preset frequency or not; if the operating frequency of the compressor is greater than or equal to the preset frequency, determining that the heat dissipation mode is refrigerant heat dissipation; otherwise, determining the heat dissipation mode as air-cooled heat dissipation.
The refrigerant heat dissipation effect is better than the air cooling heat dissipation effect, so when the operation frequency is higher and the environment temperature is higher, the refrigerant heat dissipation is preferentially adopted to achieve the better heat dissipation effect. When the operating frequency is low or the environmental temperature is not high, namely the heat dissipation requirement is low, air cooling heat dissipation is adopted to save energy.
Specifically, the heat dissipation of the controller according to the heat dissipation mode includes: when the heat dissipation mode is refrigerant heat dissipation, opening a throttling element of a refrigerant heat dissipation pipeline, adjusting the throttling element to a first preset opening degree, and dissipating heat of the controller through the refrigerant; and when the heat dissipation mode is air cooling heat dissipation, the air cooling module is started, and the controller is cooled through air flow.
Wherein, for the refrigerant heat dissipation, open the throttling element of refrigerant heat dissipation pipeline to after adjusting to first preset aperture, still include: detecting the temperature of the controller; judging the load state of the controller according to the temperature of the controller; the opening of the restriction element is controlled in dependence on the load situation.
In the invention, the load state is divided into a high load state and a limit load state, and other states can be divided according to actual needs and corresponding control modes can be set. For the judgment of the load state, the method for judging the load state of the controller by adopting the temperature of the controller specifically comprises the following steps: when the temperature of the controller is greater than or equal to a second preset temperature and less than or equal to a third preset temperature, determining that the load state of the controller is a high load state; wherein the third preset temperature is higher than the second preset temperature; and when the temperature of the controller is higher than the third preset temperature, determining the load state of the controller as the limit load state. And the second preset temperature is larger than the first preset temperature.
After determining the load state, the opening of the restriction element is controlled in accordance with the load state, which may be done by: when the load state is a high load state, increasing the opening degree of the throttling element to a second preset opening degree; and when the load state is the limit load state, adjusting the opening degree of the throttling element to the maximum opening degree.
In order to avoid the controller from being dangerous due to overhigh temperature under the condition of extremely high load, the controller is used for adjusting the opening degree of the throttling element to the maximum opening degree after the load state is the limit load state, and the method further comprises the following steps: after the preset waiting time, detecting the current temperature of the controller again; and if the current temperature of the controller is higher than the third preset temperature, controlling the unit to enter shutdown protection.
Through the mode, the corresponding opening degree can be executed under different load states, the appropriate flow is achieved, the unit fault under the limit condition can be avoided, and the reliable operation of the unit is guaranteed.
In preferred embodiment 2 of the present invention, another alternative controller heat dissipation control method is also provided. In particular, fig. 4 shows an alternative flow chart of the method, which, as shown in fig. 4, comprises the following steps S401-S411:
s401, starting up to operate;
s402, starting the compressor for 10min, and entering steps S403 and S404;
s403, detecting the frequency of the compressor;
s404, detecting the temperature of the external environment;
for the refrigeration mode, if the frequency f of the compressor is more than or equal to 65hz and the external environment temperature T is more than or equal to 46 ℃, entering a refrigerant heat dissipation control mode, namely step S405, and otherwise, entering step S406; for the heating mode, if the compressor frequency f is greater than or equal to 65hz, the cooling medium heat dissipation control mode is entered, i.e. step S405.
S405, opening the electronic expansion valve, entering a refrigerant heat dissipation control mode, and otherwise, entering S406;
s406, the electronic expansion valve does not act;
s407, adjusting the electronic expansion valve from 0b to 300b and maintaining the electronic expansion valve for three minutes;
s408, detecting the temperature Tpfc of the controller module; if the module temperature Tpfc is less than or equal to 80 ℃, judging that the module temperature is low and the load is small, and entering step S409; if the temperature of the module is more than or equal to 90 ℃ and the temperature of the module Tpfc is more than or equal to 80 ℃, judging that the temperature of the module is relatively high, and entering step S409 to adjust the electronic expansion valve to 400 b; if the module temperature Tpfc is not less than 95 ℃, judging that the load of the module controller is extremely high, entering a dangerous mode, entering a step S409, and opening the valve step to 480 b;
s409, the electronic expansion valve does not act;
s410, adjusting the electronic expansion valve to 400 b;
and S411, adjusting the electronic expansion valve to 480 b.
The cooling mode and the heating mode are separately described as follows:
for the cooling mode: firstly, detecting the environment temperature after the compressor is detected to be started and operated for more than or equal to 10min, and entering a refrigerant heat dissipation control mode if the external environment temperature T is more than or equal to 46 ℃ and the compressor frequency f is more than or equal to 65 Hz; otherwise, the electronic expansion valve does not act, and the air cooling module is used for cooling the refrigerant; the refrigerant heat dissipation control mode includes: opening the throttling element, adjusting the opening degree of the electronic expansion valve from 0b to 300b, enabling a refrigerant to flow into the heat dissipation module, detecting the temperature of the module, adjusting the opening degree of the electronic expansion valve, judging that the temperature of the module is lower and the load is smaller if the optimal range of the temperature of the module is less than or equal to 80 ℃, ensuring that the electronic expansion valve does not act, and maintaining the opening degree (in order to avoid the influence on the refrigerating capacity caused by overlarge refrigerant flow); if the temperature range of the module is less than or equal to 90 ℃ and more than 80 ℃, judging that the load of the controller is relatively large, and adjusting the electronic expansion valve to 400 b; if the temperature of the controller module is detected to be greater than or equal to 95 ℃, determining that the load of the controller is extremely high, entering a dangerous mode, and opening the valve step to 480 b; if the temperature is detected to be still higher after ten minutes, entering a controller protection shutdown state.
In the heating mode: only the compressor frequency is detected, if the compressor frequency f is greater than or equal to 65Hz or other values, such as 85Hz, the refrigerant heat dissipation control mode is entered, which is consistent with the refrigeration state, and the refrigerant heat dissipation control mode includes: opening the throttling element, adjusting the opening degree of the electronic expansion valve from 0b to 300b, enabling a refrigerant to flow into the heat dissipation module, detecting the temperature of the module, adjusting the opening degree of the electronic expansion valve, judging that the temperature of the module is lower and the load is smaller if the optimal range of the temperature of the module is less than or equal to 80 ℃, ensuring that the electronic expansion valve does not act, and maintaining the opening degree (in order to avoid the influence on the refrigerating capacity caused by overlarge refrigerant flow); if the temperature range of the module is less than or equal to 90 ℃ and more than 80 ℃, judging that the load of the controller is relatively large, and adjusting the electronic expansion valve to 400 b; if the temperature of the controller module is detected to be greater than or equal to 95 ℃, determining that the load of the controller is extremely high, entering a dangerous mode, and opening the valve step to 480 b; under other conditions, air cooling is adopted for heat dissipation.
Through the mode, the loss of the refrigerating and heating capacity under the condition of low temperature and low frequency can be avoided, the adjusting mode is more intelligent, and the refrigerant heat dissipation can be ensured not to cause great influence on the system capacity and energy efficiency.
Example 3
Based on the controller heat dissipation system provided in embodiment 1 and the controller heat dissipation control method provided in embodiment 2, in a preferred embodiment 3 of the present invention, an air conditioning unit is further provided, which includes the controller heat dissipation system as described above, or adopts the controller heat dissipation control method as described above.
In the above embodiments, a novel controller heat dissipation system applied to a two-stage compressor system is provided, including: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch line is connected with an air outlet of the two-stage compressor, and the other end of the first branch line is connected with an inlet of the heat exchanger and used for introducing a refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for dissipating heat of the heat dissipation module through the heat dissipation module of the controller. In this way, the problem that condensation is generated on the controller module due to the fact that the refrigerant heat dissipation technology in the prior art can be effectively solved, condensation is avoided, meanwhile, enough refrigerating capacity is guaranteed when the refrigerant is adopted for heat dissipation, temperature change of the controller heat dissipation module is small when the refrigeration and heating modes are switched, and reliability of the controller is improved.
Example 4
Based on the controller heat dissipation control method provided in the above embodiment 2, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for executing the controller heat dissipation control method as described above when executed by a computer processor.
In the above embodiment, a novel controller heat dissipation control method applied to a two-stage compressor system is provided, where after a unit is started for a preset time, an ambient temperature and a compressor operating frequency are detected, and a heat dissipation mode of a controller is determined according to the ambient temperature and/or the compressor operating frequency to dissipate heat. In this way, the problem that condensation is generated on the controller module due to the fact that the refrigerant heat dissipation technology in the prior art can be effectively solved, condensation is avoided, meanwhile, enough refrigerating capacity is guaranteed when the refrigerant is adopted for heat dissipation, temperature change of the controller heat dissipation module is small when the refrigeration and heating modes are switched, and reliability of the controller is improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (15)
1. A controller cooling system is applied to a double-stage compressor system and is characterized by comprising:
the refrigerant heat dissipation pipeline comprises a first branch and a second branch;
one end of the first branch line is connected with an air outlet of the double-stage compressor (9), and the other end of the first branch line is connected with an inlet of the heat exchanger, and is used for introducing a refrigerant discharged by the double-stage compressor (9) into the heat exchanger for heat exchange;
one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator (2), and the second branch is used for dissipating heat of the heat dissipation module (16) through the heat dissipation module (16) of the controller.
2. The system of claim 1, wherein the heat exchanger is a U-tube at the bottom of the condenser (14); wherein the number of the U-shaped pipes is one or more.
3. The system of claim 1, further comprising:
and the throttling element (17) is positioned between the heat dissipation module (16) and the flash evaporator (2) and is used for controlling the on-off of the refrigerant heat dissipation pipeline.
4. The system of claim 1, further comprising:
and the air cooling module is connected with the heat dissipation module (16) and used for dissipating heat of the heat dissipation module (16) through air current.
5. A controller heat dissipation control method applied to the controller heat dissipation system according to any one of claims 1 to 4, comprising:
after the unit is started for a preset time, detecting the ambient temperature and the running frequency of a compressor;
determining a heat dissipation mode of the controller according to the environment temperature and/or the running frequency of the compressor;
and radiating the controller according to the radiating mode.
6. The method of claim 5, wherein determining a heat dissipation mode of a controller based on the ambient temperature and/or compressor operating frequency comprises:
acquiring an operation mode of the unit; wherein the operation mode at least comprises a heating mode and a cooling mode;
when the operation mode of the unit is a refrigeration mode, determining a heat dissipation mode of a controller according to the ambient temperature and the operation frequency of the compressor;
when the operation mode of the unit is a heating mode, determining a heat dissipation mode of a controller according to the operation frequency of the compressor;
the heat dissipation mode at least comprises refrigerant heat dissipation and air cooling heat dissipation.
7. The method of claim 6, wherein determining a heat dissipation mode of a controller based on the ambient temperature and an operating frequency of the compressor comprises:
judging whether the environment temperature is greater than or equal to a first preset temperature or not and whether the running frequency of the compressor is greater than or equal to a preset frequency or not;
if the environment temperature is greater than or equal to a first preset temperature and the running frequency of the compressor is greater than or equal to a preset frequency, determining that the heat dissipation mode is the refrigerant heat dissipation;
otherwise, determining the heat dissipation mode as the air-cooled heat dissipation.
8. The method of claim 6, wherein determining a heat dissipation mode of a controller based on an operating frequency of the compressor comprises:
judging whether the running frequency of the compressor is greater than or equal to a preset frequency or not;
if the operating frequency of the compressor is greater than or equal to a preset frequency, determining that the heat dissipation mode is the refrigerant heat dissipation;
otherwise, determining the heat dissipation mode as the air-cooled heat dissipation.
9. The method of claim 6, wherein dissipating heat from the controller according to the heat dissipation pattern comprises:
when the heat dissipation mode is refrigerant heat dissipation, opening a throttling element of a refrigerant heat dissipation pipeline, adjusting the throttling element to a first preset opening degree, and dissipating heat of the controller through the refrigerant;
and when the heat dissipation mode is air cooling heat dissipation, the air cooling module is started, and the controller is cooled through air flow.
10. The method as claimed in claim 9, wherein after the throttling element of the refrigerant heat dissipation pipeline is opened and adjusted to the first predetermined opening degree, the method further comprises:
detecting a temperature of the controller;
judging the load state of the controller according to the temperature of the controller;
controlling the opening of the throttling element according to the load state.
11. The method of claim 10, wherein the load conditions include at least a high load condition and an extreme load condition; judging the load state of the controller according to the temperature of the controller, comprising the following steps:
when the temperature of the controller is greater than or equal to a second preset temperature and less than or equal to a third preset temperature, determining that the load state of the controller is the high load state; wherein the third preset temperature is higher than the second preset temperature;
and when the temperature of the controller is higher than a third preset temperature, determining that the load state of the controller is the limit load state.
12. The method of claim 11, wherein controlling the opening of the throttling element as a function of the load condition comprises:
increasing the opening degree of the throttling element to a second preset opening degree when the load state is the high load state;
and when the load state is the limit load state, adjusting the opening degree of the throttling element to the maximum opening degree.
13. The method of claim 12, wherein after adjusting the opening of the throttling element to a maximum opening, further comprising:
after the preset waiting time, re-detecting the current temperature of the controller;
and if the current temperature of the controller is higher than the third preset temperature, controlling the unit to enter shutdown protection.
14. An air conditioning unit, characterized by comprising the controller heat dissipation system according to any one of claims 1 to 4, or by using the controller heat dissipation control method according to any one of claims 5 to 13.
15. A storage medium containing computer-executable instructions for performing the controller heat dissipation control method of any one of claims 5 to 13 when executed by a computer processor.
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| CN112503728A (en) * | 2020-11-02 | 2021-03-16 | 珠海格力电器股份有限公司 | Self-adaptive heat dissipation method, device, equipment and system |
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| JP2018173191A (en) * | 2017-03-31 | 2018-11-08 | 株式会社富士通ゼネラル | Air conditioner |
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| CN101839580A (en) * | 2009-03-20 | 2010-09-22 | 珠海格力电器股份有限公司 | Air conditioning system and method for judging whether refrigerant perfusion amount is appropriate or not |
| CN102788392A (en) * | 2012-08-03 | 2012-11-21 | 北京德能恒信科技有限公司 | Heat pipe and heat pump compound system |
| JP2018173191A (en) * | 2017-03-31 | 2018-11-08 | 株式会社富士通ゼネラル | Air conditioner |
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