CN113883600A - Air conditioner double-compressor refrigerating system and air conditioner - Google Patents
Air conditioner double-compressor refrigerating system and air conditioner Download PDFInfo
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- CN113883600A CN113883600A CN202111282897.8A CN202111282897A CN113883600A CN 113883600 A CN113883600 A CN 113883600A CN 202111282897 A CN202111282897 A CN 202111282897A CN 113883600 A CN113883600 A CN 113883600A
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- 238000005057 refrigeration Methods 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims description 115
- 230000003139 buffering effect Effects 0.000 claims description 15
- 238000004378 air conditioning Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims 7
- 239000003921 oil Substances 0.000 description 88
- 239000003570 air Substances 0.000 description 37
- 239000003507 refrigerant Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 12
- 239000010726 refrigerant oil Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0068—Indoor units, e.g. fan coil units characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing
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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
- 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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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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)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
- Compressor (AREA)
Abstract
The invention relates to the technical field of air conditioners and discloses an air conditioner double-compressor refrigeration system and an air conditioner. This two compressor refrigerating system of air conditioner and air conditioner through opening and closing first solenoid valve and second solenoid valve, realizes the synchronization of first compressor and second compressor in the compressor unit spare or independently opens to the regulation and control under the different service environment of being convenient for is used, and compares in the setting of this system of traditional two compressor refrigerating system through same condenser and evaporimeter, has both reduced the occupation of this system overall space, has reduced the consumption of the energy again.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner double-compressor refrigerating system and an air conditioner.
Background
An air conditioner, i.e. an air conditioner, is a device for adjusting and controlling parameters such as temperature, humidity, flow rate and the like of ambient air in a building or a structure by manual means, generally comprises a cold source/heat source device, a cold and hot medium transmission and distribution system, a terminal device and other auxiliary devices, and mainly comprises a refrigeration host, a water pump, a fan and a pipeline system, wherein the terminal device is responsible for utilizing the cold and heat quantity transmitted and distributed to specifically process the air state so as to enable the air parameters of a target environment to reach certain requirements, a compressor is a core part of the operation of the air conditioner, the compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, is the heart of the refrigeration system, sucks in the low-temperature low-pressure refrigerant gas from an air suction pipe, drives a piston to compress the low-temperature low-pressure refrigerant gas through the operation of a motor, and discharges the high-temperature high-pressure refrigerant gas to an exhaust pipe, a refrigeration cycle is powered to perform compression → condensation (heat release) → expansion → evaporation (heat absorption), and the compressor is classified into a piston compressor, a screw compressor, a centrifugal compressor, a linear compressor, and the like.
In order to meet the requirements of use under partial environments and better refrigeration effect, the dual-compressor air conditioner is gradually popularized, the dual-compressor air conditioner and the single-compressor air conditioner are distinguished by realizing better and faster refrigeration effect or partition refrigeration through more compressors, but the problem that the sum of the refrigeration oil in the compressor is increased correspondingly is also increased, and the refrigeration oil part mutually soluble with the refrigerant can circularly flow in a refrigeration system along with the refrigerant, so that the following problems can exist in the actual installation or use process of the air conditioner:
1. when the compressor is arranged above the evaporator, namely the compressor is higher than the installation height of the evaporator, a certain height difference exists between the evaporator and the compressor, and the refrigeration oil has the characteristic that the refrigeration oil is not vaporized due to high temperature, so the refrigeration oil can be accumulated at the bottom of the evaporator after long-time accumulation, if the refrigeration oil is accumulated too much, the suction pipe between the compressor and the evaporator is easily blocked, thereby not only being unfavorable for the stable operation of an air-conditioning refrigeration system, but also causing the situations of the reduction of the lubricating performance of the compressor, the increase of noise, more and more serious heating, the reduction of the refrigeration effect and the like due to the lower residual amount of the refrigeration oil in the refrigeration system;
2. if the compressor is arranged at the bottom of the evaporator, namely the compressor is lower than the installation height of the evaporator, the refrigerant oil can fall through the height difference between the compressor and the evaporator, but if the amount of the refrigerant liquid in the evaporator is excessive, the refrigerant oil is easy to cause the phenomenon of liquid impact after entering the compressor, thereby easily causing the damage of components such as a valve plate and the like, and the most serious consequence is that the compression part of the compressor can be permanently damaged;
3. the gas transmission quantity of part of the double compressors is small, so that the exhaust temperature of an exhaust pipe of the compressor is high in the operation process of the compressor, the refrigeration performance of the system is easily influenced, and when too much liquid is in a liquid storage device, an evaporator cannot timely evaporate the surplus liquid refrigerant, and part of the liquid refrigerant possibly enters the compressor to cause a liquid impact phenomenon;
in order to solve the problems, the air conditioner double-compressor refrigeration system and the air conditioner are provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an air conditioner double-compressor refrigerating system and an air conditioner, and solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a refrigeration system of double compressors of an air conditioner comprises a compressor assembly, a condenser, a liquid storage device, an evaporator, a buffering oil return pipeline, a first pipeline, a second pipeline, a third pipeline and a PLC (programmable logic controller), wherein the compressor assembly, the condenser, the liquid storage device, the evaporator, the buffering oil return pipeline, the first pipeline, the second pipeline and the third pipeline are sequentially communicated to form a loop;
the compressor assembly comprises a first compressor, a second compressor and a valve assembly, wherein the first compressor, the second compressor and the valve assembly are connected in series, and the valve assembly comprises a first electromagnetic valve arranged between an outlet of the first compressor and an inlet of the second compressor and a second electromagnetic valve arranged between an outlet of the first compressor and an inlet of the first pipeline;
an oil separation mechanism is arranged in the middle of the first pipeline;
a gas-liquid separation branch is arranged in the middle of the second pipeline and comprises a gas inlet pipe communicated with the surface of the second pipeline, a gas-liquid separator is arranged at one end of the gas inlet pipe, a liquid outlet pipe and a gas outlet pipe are arranged at an outlet of the gas-liquid separator, a first electronic expansion valve is arranged on the surface of the second pipeline close to the gas inlet pipe, and a second electronic expansion valve is arranged on the surface of the gas inlet pipe close to the first electronic expansion valve;
a high liquid level sensor, a medium liquid level sensor and a low liquid level sensor are sequentially arranged in the liquid storage device from top to bottom;
the surface of the third pipeline is communicated with a drying filter;
the buffering oil return pipeline comprises an oil guide pipe which is communicated with the output end of the evaporator, an arc-shaped oil return pipe is communicated with one end of the oil guide pipe, an L-shaped oil return pipe is communicated with one end of the arc-shaped oil return pipe, and one end of the L-shaped oil return pipe is communicated with the first compressor.
Optionally, the oil separating mechanism includes an oil separator disposed in the first pipeline, an output end of the oil separator is communicated with the compressor assembly through a return pipe, and an oil return valve is disposed inside the return pipe.
Optionally, the PLC controller is electrically connected to the first solenoid valve, the second solenoid valve, the high liquid level sensor, the medium liquid level sensor, the low liquid level sensor, the temperature sensor, the gas-liquid separator, the first electronic expansion valve, and the second electronic expansion valve.
Optionally, one end of the air outlet pipe is communicated with the oil guide pipe, a heat exchange pipe is arranged inside the gas-liquid separator, and the gas-liquid separator and the heat exchange pipe are of an integrated structure.
Optionally, a temperature sensor is arranged inside the first pipeline, and an outlet end of the second compressor is communicated with the first pipeline.
Optionally, one end of the liquid outlet pipe is communicated with and arranged on the surface of the second pipeline, and a first throttle valve is arranged in the second pipeline between the outlet end of the condenser and the inlet end of the liquid storage device.
Optionally, a second throttle valve is arranged between the output end of the drying filter and the input end of the evaporator in the third pipeline.
The invention provides an air conditioner, which comprises a double-compressor refrigerating system of the air conditioner provided by any technical scheme of the invention.
(III) advantageous effects
The invention provides an air conditioner double-compressor refrigerating system and an air conditioner, which have the following beneficial effects:
1. this two compressor refrigerating system of air conditioner and air conditioner through opening and closing first solenoid valve and second solenoid valve, realizes the synchronization of first compressor and second compressor in the compressor unit spare or independently opens to the regulation and control under the different service environment of being convenient for is used, and compares in the setting of this system of traditional two compressor refrigerating system through same condenser and evaporimeter, has both reduced the occupation of this system overall space, has reduced the consumption of the energy again.
2. This two compressor refrigerating system of air conditioner and air conditioner, return oil pipe way through the buffering, both can satisfy under the condition that the evaporimeter mounting height is less than compressor unit, freezing fluid deposits in the evaporimeter bottom easily, cause the unable backward flow of freezing oil and the problem of pipeline jam, make the freezing oil can return oil pipe through the setting of arc and stabilize the oil return, can satisfy under the condition that the evaporimeter mounting height is in compressor unit again, the freezing oil can be because of all the other quantities produce the problem of "liquid attack" easily when the backward flow, and use through the cooperation of oil separator, the volume that the freezing oil was taken out in the reduction compressor unit that again can be further, the risk that "liquid attack" takes place has been reduced, be favorable to compressor unit's protection and use.
3. This two compressor refrigerating system of air conditioner and air conditioner can realize the gas-liquid separation of convection cell and partial fluid vaporization through opening and closing first electronic expansion valve and second electronic expansion valve to both can make when liquid will be excessive in the reservoir promptly, not pouring into refrigerant liquid in it, avoid the reservoir to take place the condition such as overflow, simultaneously again can be with in the gas after the separation or the gas of part vaporization passes through outlet duct input compressor assembly, guarantee compressor assembly's steady operation when reducing its exhaust temperature.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a first connection configuration of the compression assembly and the buffer return line of the present invention;
FIG. 3 is a schematic view of a second connection configuration of the compression assembly and the buffer return line of the present invention;
FIG. 4 is a schematic view of a disassembled structure of the buffer oil return pipeline according to the present invention;
FIG. 5 is a schematic circuit diagram of the system of the present invention;
FIG. 6 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 7 is an enlarged view of the structure at B in FIG. 1 according to the present invention.
In the figure: 1. a compressor assembly; 101. a first compressor; 102. a second compressor; 2. a PLC controller; 3. a condenser; 5. a heat exchange pipe; 6. a reservoir; 601. a high level sensor; 602. a medium liquid level sensor; 603. a low level sensor; 7. an evaporator; 8. a buffer oil return pipeline; 801. an L-shaped oil return pipe; 802. an arc-shaped oil return pipe; 803. an oil guide pipe; 9. a first pipeline; 10. a second pipeline; 11. a third pipeline; 12. a first solenoid valve; 13. a second solenoid valve; 14. entering an air pipe; 15. a gas-liquid separator; 16. a liquid outlet pipe; 17. an air outlet pipe; 18. a first electronic expansion valve; 19. a second electronic expansion valve; 20. drying the filter; 21. an oil separator; 22. a heat exchange pipe; 23. a temperature sensor.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. 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.
The first embodiment is as follows:
referring to fig. 1, 4, 5, 6 and 7, the present invention provides a technical solution: a refrigeration system of double compressors of an air conditioner comprises a compressor component 1, a condenser 3, a liquid storage device 6, an evaporator 7, a buffering oil return pipeline 8, a first pipeline 9, a second pipeline 10, a third pipeline 11 and a PLC (programmable logic controller) 2, wherein the compressor component 1, the condenser 3, the liquid storage device 6, the evaporator 7, the buffering oil return pipeline 8, the first pipeline 9, the second pipeline 10 and the third pipeline 11 are sequentially communicated to form a loop;
the compressor component 1 comprises a first compressor 101, a second compressor 102 and a valve component, wherein the first compressor 101, the second compressor 102 and the valve component are connected in series, and the valve component comprises a first electromagnetic valve 12 arranged between an outlet of the first compressor 101 and an inlet of the second compressor 102 and a second electromagnetic valve 13 arranged between an outlet of the first compressor 101 and an inlet of the first pipeline 9;
the middle part of the first pipeline 9 is provided with an oil separation mechanism;
a gas-liquid separation branch is arranged in the middle of the second pipeline 10, the gas-liquid separation branch comprises an inlet pipe 14 communicated with the surface of the second pipeline 10, one end of the inlet pipe 14 is provided with a gas-liquid separator 15, an outlet of the gas-liquid separator 15 is provided with a liquid outlet pipe 16 and an air outlet pipe 17, the liquid outlet pipe 16 can separate fluid in the inlet pipe 14, so that the liquid flows back into the second pipeline 10 through the liquid outlet pipe 16, the gas directly enters the compressor assembly through the air outlet pipe 17, a first electronic expansion valve 18 is arranged on the surface of the second pipeline 10 close to the inlet pipe 14, and a second electronic expansion valve 19 is arranged on the surface of the inlet pipe 14 close to the first electronic expansion valve 18;
the high liquid level sensor 601, the middle liquid level sensor 602 and the low liquid level sensor 603 are sequentially arranged in the liquid storage device 6 from top to bottom, the high liquid level sensor 601, the middle liquid level sensor 602 and the low liquid level sensor 603 can monitor the liquid level condition in the liquid storage device 6 in real time, and the failure of the refrigeration system caused by too low or too high liquid level is avoided;
the surface of the third pipeline 11 is communicated with a dry filter 20, and the dry filter 20 can filter impurities in the fluid, so that the stable operation of the refrigeration system is facilitated;
the buffering oil return pipeline 8 is provided with an arc-shaped oil return pipe 802 including an oil guide pipe 803 and an oil guide pipe 803 which are communicated with each other and arranged at the output end of the evaporator 7, one end of the arc-shaped oil return pipe 802 is provided with an L-shaped oil return pipe 801, one end of the L-shaped oil return pipe 801 is communicated with the first compressor 101, and the lengths of the L-shaped oil return pipe 801 and the oil guide pipe 803 can be reasonably increased or shortened according to the actual installation height and position of the compressor assembly 1 and the evaporator 7.
The oil separating mechanism comprises an oil separator 21 arranged in the first pipeline 9, the oil separator 21 can separate oil from fluid discharged from the compressor assembly 1, the refrigeration oil in the oil separator is separated, and the separated refrigeration oil flows back to the interior of the compressor assembly 1 through a loop pipe, so that the deposition of the refrigeration oil in the evaporator 7 is further reduced, the refrigeration oil can timely flow back to lubricate the compressor assembly 1 in time, an oil return valve is arranged in the interior of a return pipe which is communicated with the compressor assembly 1 through the return pipe at the output end of the oil separator 21, and the refrigeration oil in the oil separator 21 can flow back through the return pipe when the oil return valve is opened;
the PLC controller 2 is electrically connected with the first electromagnetic valve 12, the second electromagnetic valve 13, the high liquid level sensor 601, the middle liquid level sensor 602, the low liquid level sensor 603, the temperature sensor 23, the gas-liquid separator 13, the first electronic expansion valve 18 and the second electronic expansion valve 19;
one end of the air outlet pipe 17 is communicated with the oil guide pipe 803, the heat exchange pipe 22 is arranged in the gas-liquid separator 15, the heat exchange pipe 22 can exchange heat with the separated liquid in the gas-liquid separator 15 to make the liquid become gas, thereby reducing the liquid allowance in the storage 6 when needed, avoiding the condition of liquid seepage caused by excessive liquid, simultaneously converting the liquid into gas to be synchronously input into the compressor component 1, increasing the suction amount of the compressor component 1 to improve the refrigeration effect of the compressor component 1 and reduce the exhaust temperature of the compressor component 1, the gas-liquid separator 15 and the heat exchange pipe 22 are of an integrated structure, the temperature sensor 23 is arranged in the first pipeline 9, the temperature sensor 23 can detect the temperature of the gas exhausted by the compressor component 1 to be synchronous in the PIC controller 2, so as to ensure that when the temperature is too high, the PIC controller 2 can timely make a response, the outlet end of the second compressor 102 is communicated with the first pipeline 9, one end of the liquid outlet pipe 16 is communicated with the surface of the second pipeline 10, a first throttle valve is arranged in the second pipeline 10 between the outlet end of the condenser 3 and the inlet end of the liquid storage device 6, and a second throttle valve is arranged between the output end of the drying filter 20 in the third pipeline 11 and the input end of the evaporator 7;
referring to fig. 2, in the present embodiment, the installation height of the evaporator 7 is lower than that of the compressor assembly 1, the refrigerant oil is accumulated in the arc-shaped oil return pipe 802 in the buffering oil return pipeline 8, and when the refrigerant oil in the arc-shaped oil return pipe 802 is accumulated to a certain extent and is about to be blocked by the refrigerant oil, the pressure difference generated between the inlet of the compressor assembly 1 and the outlet of the evaporator 7 can cause the oil in the arc-shaped oil return pipe 802 to be sucked out by itself, so as to be recovered by the compressor assembly 1.
Example two:
referring to fig. 3, the present embodiment provides a refrigeration system with two air-conditioning compressors, which is different from the refrigeration system with two air-conditioning compressors according to the first embodiment in the installation position of the buffer oil return pipeline 8. In this embodiment, the installation height of the evaporator 7 is higher than that of the compressor assembly 1, so that the length of the L-shaped oil return pipe 801 is shortened by extending the oil guide pipe 803, so that the installation between the compressor assembly 1 and the evaporator 7 is satisfied, when the refrigerant oil flows back to the bottom of the evaporator 7, the refrigerant oil falls in the buffering oil return pipeline 8 through the height difference, and the arc-shaped oil return pipe 802 can reduce the impact force of the falling refrigerant oil, thereby avoiding the occurrence of the "liquid impact" condition of the compressor assembly 1 caused by too large oil return amount.
The detailed description of the known functions and the known components is omitted in the embodiment of the disclosure, and in order to ensure the compatibility of the equipment, the adopted operation means are consistent with the parameters of the instruments on the market.
In summary, the operation steps of the air-conditioning dual-compressor refrigeration system are as follows;
1. when the compressor is used, when the external environment temperature is low, the first electromagnetic valve 12 is closed, the second electromagnetic valve 13 is opened, so that the first compressor 101 in the compressor assembly 1 works, when the external environment temperature is low or rapid refrigeration is needed, the first electromagnetic valve 12 is opened, the second electromagnetic valve 13 is closed, so that the first compressor 101 and the second compressor 102 in the compressor assembly 1 work synchronously, adjustment and use under different conditions are facilitated, and the same condenser 3 and the same evaporator 7 jointly act on the arrangement of the first compactor 101 and the second compressor 102, so that the space utilization rate is improved, and the energy consumption is reduced;
2. the PLC controller 2 monitors the liquid storage device 6 through a high liquid level sensor 603, a middle liquid level sensor 602 and a low liquid level sensor 601;
2.1, when the refrigerant in the liquid storage device 6 is monitored to be at the position of the low liquid level sensor 601, the refrigerant in the liquid storage device 6 is less, the second electronic expansion valve 19 is closed, the first electronic expansion valve 18 is opened, and the gas-liquid separator 15 stops working;
2.2, when the refrigerant in the liquid storage 6 is detected to be at the position of the middle liquid level sensor 602, that is, the refrigerant in the liquid storage 6 is in a normal state, the system is in a normal working state, therefore under the condition that the temperature sensor 23 detects that the exhaust temperature of the compressor assembly 1 is higher and exceeds a high temperature set value to reduce the exhaust temperature of the compressor assembly 1, the PLC controller 2 gives signals to the second electronic expansion valve 19 and the first electronic expansion valve 18 to synchronously open the two valves at corresponding angles to control the flow rate of the fluid in the pipeline, a part of the fluid is input into the gas-liquid separator 15 through the gas inlet pipe 14, the gas-liquid separator 15 separates the liquid and the gas in the fluid, the gas is directly input into the compressor assembly 1, so that the exhaust temperature of the compressor assembly 1 can be reduced, at this time, if the temperature sensor 23 still detects that the exhaust temperature of the compressor assembly 1 is higher, the heat exchange tube 22 works to exchange heat with the separated liquid to make the separated liquid form gas which is synchronously input into the gas outlet tube 17, and the gas flow in the gas outlet tube is increased, so that the exhaust temperature of the compressor component 1 is reduced, or the opening and closing angles of the second electronic expansion valve 19 and the first electronic expansion valve 18 are further adjusted, and the fluid input into the gas inlet tube 14 is enabled to be surplus and input into the fluid in the liquid reservoir 6;
2.3, when the refrigerant in the liquid storage device 6 is monitored to be at the position of the high liquid level sensor 601, namely, the refrigerant in the liquid storage device 6 is in a plurality of states, at the moment, the second electronic expansion valve 19 needs to be opened, the first electronic expansion valve 18 is closed, so that the fluid is completely input into the gas inlet pipe 14, the heat exchange pipe 22 works to exchange heat with the liquid, the generated gas is completely input into the compressor assembly 1, and a small amount of part of refrigeration oil liquid can be injected into the liquid storage pipe 6 through the second pipeline 10, so that the situation that the liquid storage device 6 causes 'liquid impact' to the compressor assembly 1 due to incomplete evaporation of the evaporator 7 caused by a large amount of liquid is avoided;
3. in the normal working process of the refrigerating system, oil liquid reflowing from the bottom of the evaporator 7 is arranged through a buffering oil return pipeline 8;
3.1, when the position of the evaporator 7 is lower than the installation height of the compressor assembly 1, the refrigerant oil is accumulated in the arc-shaped oil return pipe 802 in the buffering oil return pipeline 8, and when the refrigerant oil in the arc-shaped oil return pipe 802 is accumulated to a certain degree to cause the refrigerant oil to be blocked, the pressure difference generated between the inlet of the compressor assembly 1 and the outlet of the evaporator 7 can lead the oil in the arc-shaped oil return pipe 802 to be sucked out by the compressor assembly 1;
3.2, when the position of the evaporator 7 is higher than the installation height of the compressor assembly 1, when the refrigeration oil flows back to the bottom of the evaporator 7, the refrigeration oil falls down through the height difference in the buffering oil return pipeline 8, and the arc-shaped oil return pipe 802 can slow down the impact force of the falling refrigeration oil so as to ensure that the refrigeration oil stably flows back to the inside of the compressor assembly 1.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution and the inventive concept thereof are also within the scope of the present invention, wherein the standard parts used can be purchased from the market, and can be customized according to the description and the accompanying drawings, the concrete connection manner of each part adopts the conventional means of bolt, rivet, welding, etc. mature in the prior art, the machines, parts and equipment adopt the conventional models in the prior art, and the structure and principle of the parts known to those skilled in the art can be known to those skilled in the art through the technical manual or through the conventional experimental method in the description of the present specification, the terms "connect", "mount", "fix", "set", and the like are used in a broad sense, for example, the term "connect" may be a fixed connection or an indirect connection through intermediate components without affecting the relationship and technical effects of the components, or may be an integral connection or a partial connection, as in this case, for a person skilled in the art, the specific meaning of the above terms in the present invention or the invention can be understood according to specific situations.
Claims (8)
1. The air conditioner double-compressor refrigerating system is characterized by comprising a compressor assembly (1), a condenser (3), a liquid storage device (6), an evaporator (7), a buffering oil return pipeline (8), a first pipeline (9), a second pipeline (10), a third pipeline (11) and a PLC (programmable logic controller) controller (2), wherein the compressor assembly (1), the condenser (3), the liquid storage device (6), the evaporator (7), the buffering oil return pipeline (8), the first pipeline (9), the second pipeline (10) and the third pipeline (11) are sequentially communicated to form a loop;
the compressor assembly (1) comprises a first compressor (101), a second compressor (102) and a valve assembly, wherein the first compressor (101), the second compressor (102) and the valve assembly are connected in series, and the valve assembly comprises a first electromagnetic valve (12) arranged between an outlet of the first compressor (101) and an inlet of the second compressor (102) and a second electromagnetic valve (13) arranged between an outlet of the first compressor (101) and an inlet of the first pipeline (9);
an oil separation mechanism is arranged in the middle of the first pipeline (9);
a gas-liquid separation branch is arranged in the middle of the second pipeline (10), the gas-liquid separation branch comprises a gas inlet pipe (14) communicated with the surface of the second pipeline (10), a gas-liquid separator (15) is arranged at one end of the gas inlet pipe (14), a liquid outlet pipe (16) and a gas outlet pipe (17) are arranged at the outlet of the gas-liquid separator (15), a first electronic expansion valve (18) is arranged on the surface of the second pipeline (10) close to the gas inlet pipe (14), and a second electronic expansion valve (19) is arranged on the surface of the gas inlet pipe (14) close to the first electronic expansion valve (18);
a high liquid level sensor (601), a medium liquid level sensor (602) and a low liquid level sensor (603) are sequentially arranged in the liquid reservoir (6) from top to bottom;
the surface of the third pipeline (11) is communicated with a drying filter (20);
buffering oil return pipeline (8) including the intercommunication set up in oil pipe (803) that leads of evaporimeter (7) output, the one end intercommunication of oil pipe (803) is provided with arc and returns oil pipe (802), the one end intercommunication of arc returns oil pipe (802) is provided with L shape and returns oil pipe (801), the one end and the first compressor (101) intercommunication setting of L shape return oil pipe (801).
2. An air conditioning dual compressor refrigeration system according to claim 1, wherein: the oil separation mechanism comprises an oil separator (21) arranged in the first pipeline (9), the output end of the oil separator (21) is communicated with the compressor assembly (1) through a return pipe, and an oil return valve is arranged in the return pipe.
3. An air conditioning dual compressor refrigeration system according to claim 1, wherein: the PLC controller (2) is electrically connected with the first electromagnetic valve (12), the second electromagnetic valve (13), the high liquid level sensor (601), the medium liquid level sensor (602), the low liquid level sensor (603), the temperature sensor (23), the gas-liquid separator (13), the first electronic expansion valve (18) and the second electronic expansion valve (19).
4. An air conditioning dual compressor refrigeration system according to claim 1, wherein: one end of the air outlet pipe (17) is communicated with the oil guide pipe (803), a heat exchange pipe (22) is arranged inside the gas-liquid separator (15), and the gas-liquid separator (15) and the heat exchange pipe (22) are of an integrated structure.
5. An air conditioning dual compressor refrigeration system according to claim 1, wherein: a temperature sensor (23) is arranged in the first pipeline (9), and the outlet end of the second compressor (102) is communicated with the first pipeline (9).
6. An air conditioning dual compressor refrigeration system according to claim 1, wherein: one end of the liquid outlet pipe (16) is communicated with the surface of the second pipeline (10), and a first throttle valve is arranged in the second pipeline (10) between the outlet end of the condenser (3) and the inlet end of the liquid storage device (6).
7. An air conditioning dual compressor refrigeration system according to claim 1, wherein: and a second throttle valve is arranged between the output end of the drying filter (20) in the third pipeline (11) and the input end of the evaporator (7).
8. An air conditioner characterized by comprising an air conditioning dual compressor refrigeration system as claimed in any one of claims 1 to 7.
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| CN202111282897.8A CN113883600B (en) | 2021-11-01 | 2021-11-01 | Air conditioner double-compressor refrigerating system and air conditioner |
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| CN202111282897.8A CN113883600B (en) | 2021-11-01 | 2021-11-01 | Air conditioner double-compressor refrigerating system and air conditioner |
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| CN113883600B CN113883600B (en) | 2023-02-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704979A (en) * | 2022-04-24 | 2022-07-05 | 珠海格力电器股份有限公司 | Refrigerating system, air conditioner and control method of refrigerating system |
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| CN113883600B (en) | 2023-02-10 |
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Address after: 443000 No. 160, Lanting Avenue, Lanting District, Yichang City, Hubei Province Patentee after: Pureis Technology (Hubei) Co.,Ltd. Address before: 443000 No. 160, Lanting Avenue, Lanting District, Yichang City, Hubei Province Patentee before: Hubei Puruis Energy Saving Technology Service Co.,Ltd. |