CN104634028B - Method for reducing exhaust pressure of compressors - Google Patents
Method for reducing exhaust pressure of compressors Download PDFInfo
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- CN104634028B CN104634028B CN201310558063.4A CN201310558063A CN104634028B CN 104634028 B CN104634028 B CN 104634028B CN 201310558063 A CN201310558063 A CN 201310558063A CN 104634028 B CN104634028 B CN 104634028B
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- Prior art keywords
- compressor
- pressure
- heat exchange
- control
- expulsion
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0271—Compressor control by controlling pressure the discharge pressure
Abstract
The invention provides a method for reducing the exhaust pressure of compressors. A system comprises a first adjusting system, a second adjusting system and a control system. The first adjusting system comprises the first compressor and first heat exchange tube sets communicated with the first compressor. The second adjusting system comprises the second compressor and second heat exchange tube sets communicated with the second compressor. A refrigerant flow way of the first adjusting system and a refrigerant flow way of the second adjusting system are independent from each other, and the first heat exchange tube sets and the second heat exchange tube sets are arranged on a first heat exchanger alternately. The control system comprises a detecting part and a control part, the detecting part is used for detecting the exhaust pressure of the first compressor, the exhaust pressure of the second compressor and the environment temperature and transmitting detecting data to the control part, the control part compares the detecting data with preset data, whether one of the first compressor and the second compressor is shut down or not is controlled according to a comparison result. According to the system, the heat exchange area of the heat exchange tube sets in the working process can be enlarged, the exhaust pressure of the compressor in the working process is reduced, and the reliability of the compressors is improved.
Description
Technical field
The present invention relates to apparatus of air conditioning field, in particular to a kind of air-conditioning reducing Compressor Discharge Pressure
System and method.
Background technology
Because R22 type cold-producing medium has destruction to atmospheric ozone layer, according to Montreal Agreement, developed country has opened
Begin to prohibit the use of R22 type coolant, in partial development, country also begins to reduce or suspend the use of R22 type coolant successively.At present,
R410a type cold-producing medium be internationally recognized for replacing the most suitable novel environment-friendly refrigerant of R22 type cold-producing medium, do not destroy ozone
Layer.But R410a type coolant has higher pressure at expulsion, high pressure at expulsion affects the reliability of compressor, which limits
The range of R410a type coolant compressor.
Content of the invention
The present invention is intended to provide a kind of method reducing Compressor Discharge Pressure, to solve air conditioning system of the prior art
Compressor Discharge Pressure height cause functional reliability difference problem.
To achieve these goals, according to an aspect of the invention, it is provided a kind of reduce Compressor Discharge Pressure
Air conditioning system, the air conditioning system of this reduction Compressor Discharge Pressure includes：First regulating system, including the first compressor with
The first set of heat exchange tubes that one compressor is connected；Second regulating system, is connected including the second compressor with the second compressor
The second set of heat exchange tubes, the refrigerant flow of the first regulating system and the second regulating system is separate, and the first set of heat exchange tubes with
Second set of heat exchange tubes is respectively arranged on First Heat Exchanger；Control system, including test section and control unit, test section detection the
The pressure at expulsion of one compressor, the pressure at expulsion of the second compressor and ambient temperature, and detection data is transmitted to control unit, control
Detection data is compared by portion processed with preset data, controls whether to close in the first compressor and the second compressor according to comparison result
One.
Further, the first regulating system has multiple first set of heat exchange tubes, and the second regulating system has multiple second and changes
Heat pipe heat, First Heat Exchanger is provided between two neighboring first set of heat exchange tubes second set of heat exchange tubes.
Further, the air conditioning system reducing Compressor Discharge Pressure also includes the second heat exchanger, and the first regulating system is also
Including：3rd set of heat exchange tubes, is arranged in the second heat exchanger, the 3rd set of heat exchange tubes is connected to the first heat exchanger tube of First Heat Exchanger
Between the port of export of group and the air inlet of the first compressor；First throttle mechanism, is arranged on the first heat exchanger tube of First Heat Exchanger
On refrigerant pipe between the port of export of group and the arrival end of the 3rd set of heat exchange tubes.
Further, the second regulating system also includes：4th set of heat exchange tubes, the 4th set of heat exchange tubes and the 3rd set of heat exchange tubes phase
Between be arranged in the second heat exchanger, the 4th set of heat exchange tubes is connected to the port of export of the second set of heat exchange tubes and second of First Heat Exchanger
Between the air inlet of compressor；Second throttle body, is arranged on the port of export of the second set of heat exchange tubes and the 4th of First Heat Exchanger
On refrigerant pipe between the arrival end of set of heat exchange tubes.
Further, test section includes：Ambient temperature detector unit, including the medium inlet end being arranged on First Heat Exchanger
Temperature-sensitive bag, temperature-sensitive bag is used for detecting the heat exchange medium temperature of external environment；Pressure sensing cell, including being arranged on the first compression
The first pressure sensor of the air vent of machine and be arranged on the second compressor air vent second pressure sensor.
According to a further aspect in the invention, there is provided a kind of method reducing Compressor Discharge Pressure, it is applied to above-mentioned
Reduce the air conditioning system of Compressor Discharge Pressure, the method comprises the steps：S10：Heat transferring medium in detection external environment
Temperature T and pressure at expulsion P of the first compressor1And second compressor pressure at expulsion P2；S20：According to heat exchange medium temperature T,
Pressure at expulsion P of the first compressor1And second compressor pressure at expulsion P2Control whether the first compressor and the second compression
Machine one of close.
Further, also include step S30 between step S10 and step S20：Compare capacity V of the first compressor1With
Capacity V of the second compressor2, and comparison result is transmitted to control unit.
Further, if the comparison result of step S30 is capacity V of the first compressor1Row equal to the second compressor
Tolerance V2, then step S20 comprise the steps：S21：Set the first control temperature T1, by heat exchange medium temperature T and first control
Temperature T1Compare；S22：Setup control pressure P, respectively by pressure at expulsion P of the first compressor1Exhaust pressure with the second compressor
Power P2Compare with control pressure P, if heat exchange medium temperature T is more than the first control temperature T1, and pressure at expulsion P of the first compressor1
Pressure at expulsion P with the second compressor2In arbitrary more than control pressure P, then close the first compressor or the second compressor.
Further, if the comparison result of step S30 is capacity V of the first compressor1Aerofluxuss with the second compressor
Amount V2Unequal, then step S20 comprises the steps：S23：Set the second control temperature T2With the 3rd control temperature T3, and second
Control temperature T2Less than the 3rd control temperature T3, heat exchange medium temperature T is controlled temperature T with second respectively2With the 3rd control temperature
T3Compare, and it is interval to determine that heat exchange medium temperature T is located；S24：Setup control pressure P, respectively by the exhaust pressure of the first compressor
Power P1Pressure at expulsion P with the second compressor2Compare with control pressure P；S25：If it is determined that heat exchange medium temperature T is more than the 3rd control
Temperature T processed3, and pressure at expulsion P of the first compressor1Or second compressor pressure at expulsion P2More than control pressure P, then control
Device cuts out that in the first compressor and the second compressor, capacity is larger.
Further, if it is determined that heat exchange medium temperature T is more than the second control temperature T in step S252And less than the 3rd control
Temperature T3, and pressure at expulsion P of the first compressor1Or second compressor pressure at expulsion P2More than control pressure P, then controller
Close less of capacity in the first compressor and the second compressor.
Application technical scheme, reduce Compressor Discharge Pressure air conditioning system include the first regulating system, the
Two regulating systems and control system, the first regulating system includes the first compressor and the first heat exchange being connected with the first compressor
Pipe group；Second regulating system includes the second compressor and the second set of heat exchange tubes being connected with the second compressor, and first adjusts system
The refrigerant flow of system and the second regulating system is separate, and the first set of heat exchange tubes and the second set of heat exchange tubes are respectively arranged on the
On one heat exchanger；Control system includes test section and control unit, and test section detects the pressure at expulsion of the first compressor, the second compression
The exhaust pressure of machine and ambient temperature, and transmit detection data to control unit, detection data is compared by control unit with preset data
Right, control whether to close one of the first compressor and the second compressor according to comparison result.First regulating system and second
Regulating system shares a First Heat Exchanger, and the first set of heat exchange tubes and the alternate setting of the second set of heat exchange tubes, which ensure that when inspection
Survey portion detects that ambient temperature is too high, and when any one pressure at expulsion in the first compressor and the second compressor is too high,
One of compressor can be closed by control unit, is no longer connected with coolant in a part of heat exchanger tube in such First Heat Exchanger,
It is in the heat exchange area increase that the coolant of the compressor conveying of running status can use in First Heat Exchanger, heat exchange efficiency carries
Rise, pressure at expulsion declines, and then ensure that the reliability of compressor operating.
Brief description
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows that the annexation of the air conditioning system of reduction Compressor Discharge Pressure of embodiments of the invention is illustrated
Figure；
Fig. 2 shows according to the first set of heat exchange tubes in the First Heat Exchanger of Fig. 1 and the second set of heat exchange tubes structure chart；And
Fig. 3 shows the structure chart of the refrigerant flow in First Heat Exchanger when closing according to second compressor of Fig. 1.
Description of reference numerals：11st, the first compressor；12nd, first throttle mechanism；21st, the second compressor；22nd, the second throttling
Mechanism；30th, First Heat Exchanger；31st, the first set of heat exchange tubes；32nd, the second set of heat exchange tubes；40th, the second heat exchanger；51st, first pressure
Sensor；52nd, second pressure sensor.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the embodiment in the application and the feature in embodiment can be mutually combined.
As shown in Figures 1 to 3, according to embodiments of the invention, the air conditioning system reducing Compressor Discharge Pressure includes first
Regulating system, the second regulating system and control system, the first regulating system include the first compressor 11 and with the first compressor 11
The first set of heat exchange tubes 31 being connected；Second regulating system includes the second compressor 21 and be connected with the second compressor 21
Two set of heat exchange tubes 32, the refrigerant flow of the first regulating system and the second regulating system is separate, and the first set of heat exchange tubes 31 with
Second set of heat exchange tubes 32 is respectively arranged on First Heat Exchanger 30；Control system includes test section and control unit, and test section is examined
Survey pressure at expulsion, the exhaust pressure of the second compressor 21 and the ambient temperature of the first compressor 11, and transmit detection data to control
Portion, detection data is compared by control unit with preset data, controls whether to close the first compressor 11 He according to comparison result
One of second compressor 21.First regulating system shares a First Heat Exchanger 30 with the second regulating system, and first changes
Heat pipe heat 31 and the alternate setting of the second set of heat exchange tubes 32, which ensure that ambient temperature is detected too high when test section, and the first pressure
When any one pressure at expulsion in contracting machine 11 and the second compressor 21 is too high, control unit can be by one of compression office
Close, in a part of heat exchanger tube in such First Heat Exchanger 30, be no longer connected with coolant, be in the compressor conveying of running status
The heat exchange area that coolant can use in First Heat Exchanger 30 increases, and heat exchange efficiency is lifted, and pressure at expulsion declines, and then ensures
The reliability of compressor operating.
In the present embodiment, the air conditioning system reducing Compressor Discharge Pressure also includes the second heat exchanger 40.First regulation
System also includes first throttle mechanism 12 and the 3rd set of heat exchange tubes being arranged in the second heat exchanger 40.First compressor 11,
Connected by refrigerant pipe between the first set of heat exchange tubes 31 in one heat exchanger 30, first throttle mechanism 12 and the 3rd set of heat exchange tubes,
And constitute the refrigerant flow of the first independent regulating system.
It is connected between the air vent of the first compressor 11 and the arrival end of the first set of heat exchange tubes 31 of First Heat Exchanger 30
Refrigerant pipe.The entrance of the 3rd set of heat exchange tubes of the port of export of the first set of heat exchange tubes 31 of First Heat Exchanger 30 and the second heat exchanger 40
It is connected with refrigerant pipe between end.The air inlet of the port of export of the 3rd set of heat exchange tubes of the second heat exchanger 40 and the first compressor 11 it
Between be connected with refrigerant pipe.First throttle mechanism 12 is arranged on the port of export and second of the first set of heat exchange tubes 31 of First Heat Exchanger 30
On refrigerant pipe between the arrival end of the 3rd set of heat exchange tubes of heat exchanger 40.
Second regulating system also includes second throttle body 22 and the 4th set of heat exchange tubes being arranged in the second heat exchanger 40.
Between the second set of heat exchange tubes 32 in second compressor 21, First Heat Exchanger 30, second throttle body 22 and the 4th set of heat exchange tubes
Connected by refrigerant pipe, and constitute the refrigerant flow of the second independent regulating system.
It is connected between the air vent of the second compressor 21 and the arrival end of the second set of heat exchange tubes 32 of First Heat Exchanger 30
Refrigerant pipe.The entrance of the 4th set of heat exchange tubes of the port of export of the second set of heat exchange tubes 32 of First Heat Exchanger 30 and the second heat exchanger 40
It is connected with refrigerant pipe between end.The air inlet of the port of export of the 4th set of heat exchange tubes of the second heat exchanger 40 and the second compressor 21 it
Between connect refrigerant pipe.The port of export of the second set of heat exchange tubes 32 that second throttle body 22 is arranged on First Heat Exchanger 30 changes with second
On refrigerant pipe between the arrival end of the 4th set of heat exchange tubes of hot device 40.
In conjunction with referring to Fig. 2 and 3 it is preferable that the first set of heat exchange tubes 31 and the second set of heat exchange tubes 32 all have multiple, and first
On heat exchanger 30, between two adjacent the first set of heat exchange tubes 31, it is provided with second set of heat exchange tubes 32.So change first
On hot device 30, it is alternate setting between the first set of heat exchange tubes 31 and the second set of heat exchange tubes 32, when one of compressor stops fortune
After row, after the coolant entrance First Heat Exchanger 30 of the compressor discharge being in running status, due to the fin of First Heat Exchanger 30
Can continuously heat conduction so that the heat exchange area of coolant and medium increases, heat exchange efficiency improves, and condensing pressure reduces, and then reduces
The pressure at expulsion of operating compressor is it is ensured that the reliability of compressor operating.
The number of the number of the first set of heat exchange tubes 31 in First Heat Exchanger 30 and the second set of heat exchange tubes 32 can be according to changing
Heat it needs to be determined that, the number of the heat exchanger tube in each first set of heat exchange tubes 31 can also be according to the capacity of the first compressor 11
Select, the quantity of the corresponding heat exchanger tube taking of the big compressor of capacity is many, so as to increasing heat exchange area.Preferably, often
In individual first set of heat exchange tubes 31 quantity of single heat exchanger tube be 1 to 6 it is preferable that heat exchanger tube quantity is 2, or 4, or 6
Individual.The number of each second set of heat exchange tubes 32 is selected according to the capacity of the second compressor 21 it is preferable that each second set of heat exchange tubes
In 32 the quantity of single heat exchanger tube be 1 to 6 it is preferable that heat exchanger tube quantity is 2, or 4, or 6.
The arrangement mode of the heat exchanger tube in the first set of heat exchange tubes 31 and the second set of heat exchange tubes 32 can also may be used for staggered tubes group
To be in-line arrangement pipe group or other arrangement mode, the coolant stream between the first set of heat exchange tubes 31 and the second set of heat exchange tubes 32 only need to be ensured
Road is mutually isolated.First compressor 11 and the second compressor 21 can be the pressures that screw compressor can also be other species
Contracting machine.
Control system includes test section and control unit.Test section includes ambient temperature detector unit and pressure sensing cell.
Wherein ambient temperature detector unit is used for detecting outdoor environment temperature, and pressure sensing cell is used for the row of detection the first compressor 11
Atmospheric pressure and the pressure at expulsion of the second compressor 21.Control unit is carried out with default data according to the detection data that test section transmits
Compare, and determine a need for closing one of the first compressor 11 and the second compressor 21 according to comparison result.
Ambient temperature detector unit includes being arranged on the temperature-sensitive bag at the medium inlet end of First Heat Exchanger 30, and temperature-sensitive bag is used for
The temperature of the heat transferring medium of detection external environment.Pressure sensing cell includes being arranged on the first of the air vent of the first compressor 11
Pressure transducer 51 and be arranged on the second compressor 21 air vent second pressure sensor 52.
Control unit includes processor, processor and temperature-sensitive bag, first pressure sensor 51 and second pressure sensor 52 electricity
Connect, to receive the detection data that they transmit, processor is electrically connected with the first compressor 11 and the second compressor 21 to control
Their closing.
According to an embodiment of the invention on the other hand, the method reducing Compressor Discharge Pressure, is applied to above-mentioned fall
The air conditioning system of low compression machine pressure at expulsion, the method comprises the steps：
S10：Heat exchange medium temperature T in test section detection external environment and pressure at expulsion P of the first compressor 111And
Pressure at expulsion P of the second compressor 212, and detection data is transmitted to control unit；
S20：Detection data is compared by control unit with preset data, controls the first compressor 11 He according to comparison result
Being turned on and off of second compressor 21.
In different air handling systems, the first compressor 11 may be different with the capacity of the second compressor 21, because
And also include step S30 between step S10 and step S20：Compare capacity V of the first compressor 111With the second compressor
21 capacity V2, and comparison result is transmitted to control unit.
If the comparison result of step S30 is capacity V of the first compressor 111Capacity V equal to the second compressor 212,
Then step S20 comprises the steps：
S21：Set the first control temperature T1, by heat exchange medium temperature T and first control temperature T1Compare；
S22：Setup control pressure P, respectively by pressure at expulsion P of the first compressor 111Aerofluxuss with the second compressor 21
Pressure P2Compare with control pressure P, if heat exchange medium temperature T is more than the first control temperature T1, and the exhaust pressure of the first compressor 11
Power P1Pressure at expulsion P with the second compressor 212In arbitrary more than control pressure P, then close the first compressor 11 or the second pressure
Contracting machine 21.
If the comparison result of step S30 is capacity V of the first compressor 111Capacity V with the second compressor 212No
Equal, then step S20 comprises the steps：
S23：Set the second control temperature T2With the 3rd control temperature T3, and the second control temperature T2Control temperature less than the 3rd
Degree T3, heat exchange medium temperature T is controlled temperature T with second respectively2With the 3rd control temperature T3Compare, and determine heat transferring medium temperature
Degree T is located interval；
S24：Setup control pressure P, respectively by pressure at expulsion P of the first compressor 111Aerofluxuss with the second compressor 21
Pressure P2Compare with control pressure P；
S25：If it is determined that heat exchange medium temperature T is more than the 3rd control temperature T3, and pressure at expulsion P of the first compressor1Or the
Pressure at expulsion P of two compressors2More than control pressure P, then arrange in controller closing the first compressor 11 and the second compressor 21
Larger one of tolerance.
In step s 25, if it is determined that heat exchange medium temperature T is more than the second control temperature T2And less than the 3rd control temperature T3,
And first compressor 11 pressure at expulsion P1Or second compressor 21 pressure at expulsion P2More than control pressure P, then controller closing
Less one of capacity in first compressor 11 and the second compressor 21.
In the present embodiment, reducing the First Heat Exchanger 30 in the air conditioning system of Compressor Discharge Pressure is outdoor heat exchanger
Namely condenser, the second heat exchanger 40 is indoor heat exchanger namely vaporizer, and it is as follows that it reduces the process of Compressor Discharge Pressure：
The coolant of the type according to the first compressor 11 and the second compressor 21 and use sets preset data, if the first pressure
Capacity V of contracting machine 111Capacity V with the second compressor 212Equal, then set the first control temperature T1With control pressure P.
Temperature-sensitive bag detects heat exchange medium temperature T, and first pressure sensor 51 detects pressure at expulsion P of the first compressor 111, second pressure
Sensor 52 detects pressure at expulsion P of the second compressor 212.
By heat exchange medium temperature T and first control temperature T1Compare, if heat exchange medium temperature T is more than the first control temperature T1,
And first compressor 11 pressure at expulsion P1Pressure at expulsion P with the second compressor 212In any one be more than control pressure P,
Then controller cuts out one of the first compressor 11 and the second compressor 21.One of compressor is so made to stop work
Make, in a part of set of heat exchange tubes in First Heat Exchanger 30, there is no coolant, and the coolant being in operating compressor flows to the
The corresponding Guan Zuhou of one heat exchanger 30, because the continuous heat conductivity of the fin of First Heat Exchanger 30 improves the heat exchange of coolant
Area, and then the heat exchange efficiency improving, condensing pressure reduces such that it is able to reduce the pressure at expulsion of compressor it is ensured that compressor
Reliability of operation, and air conditioning system can persistently be freezed.
If capacity V of the first compressor 111Capacity V with the second compressor 212Unequal, then set the second control
Temperature T2, the 3rd control temperature T3With control pressure P.Wherein second control temperature T2Less than the 3rd control temperature T3.Temperature-sensitive bag is examined
Survey heat exchange medium temperature T, first pressure sensor 51 detects pressure at expulsion P of the first compressor 111, second pressure sensor 52
Detect pressure at expulsion P of the second compressor 212.
By heat exchange medium temperature T and second control temperature T2With the 3rd control temperature T3Compare, if heat exchange medium temperature T is big
Control temperature T in the 3rd3, and pressure at expulsion P of the first compressor 111Pressure at expulsion P with the second compressor 212In any
One is more than control pressure P then it represents that ambient temperature is too high, and condensing pressure is big, then controller cuts out the first compressor 11 and the
One that in two compressors 21, capacity is big, to make coolant obtain bigger heat exchange area, improves heat exchange efficiency, and then ensures
The reliability of compressor operating.
If heat exchange medium temperature T is more than the second control temperature T2Less than the 3rd control temperature T3, and the row of the first compressor 11
Atmospheric pressure P1Pressure at expulsion P with the second compressor 212In any one be more than control pressure P, then controller close first pressure
One that in contracting machine 11 and the second compressor 21, capacity is little, so as to expanding the heat exchange area of coolant, improves heat exchange efficiency,
And then ensure the reliability of compressor operating.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect：By first
Regulating system and the second regulating system independent cooling, mutually do not connect between refrigerant flow, when one of compressor quits work
Afterwards, will no longer have coolant in set of heat exchange tubes corresponding with this compressor in First Heat Exchanger, in First Heat Exchanger be in work
The corresponding set of heat exchange tubes of compressor making state can increase heat-transfer surface by the line heat conductivity of the fin of First Heat Exchanger
Long-pending, improve heat exchange efficiency, and then the pressure at expulsion of reduction compressor, improve compressor reliability.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (3)
1. a kind of method reducing Compressor Discharge Pressure, is applied to reduce the air conditioning system of Compressor Discharge Pressure, this air-conditioning
System includes：
First regulating system, the first set of heat exchange tubes be connected including the first compressor (11) and with described first compressor (11)
(31)；
Second regulating system, the second set of heat exchange tubes be connected including the second compressor (21) and with described second compressor (21)
(32), the refrigerant flow of described first regulating system and described second regulating system is separate, and described first set of heat exchange tubes
(31) respectively it is arranged on First Heat Exchanger (30) with described second set of heat exchange tubes (32)；
Control system, including test section and control unit, described test section detects the pressure at expulsion of described first compressor (11), institute
State pressure at expulsion and the ambient temperature of the second compressor (21), and detection data is transmitted to described control unit, described control unit
Described detection data and preset data are compared, controls whether to close described first compressor (11) and described according to comparison result
One of second compressor (21)
It is characterized in that, the method comprises the steps：
S10：Heat exchange medium temperature T in detection external environment and pressure at expulsion P of the first compressor (11)1And second compression
Pressure at expulsion P of machine (21)2；
S20：Pressure at expulsion P according to described heat exchange medium temperature T, described first compressor (11)1And described second compressor
(21) pressure at expulsion P2Control whether to close one of described first compressor (11) and described second compressor (21)；
Step S30 is also included between described step S10 and described step S20：Compare capacity V of the first compressor (11)1With
Capacity V of two compressors (21)2, and comparison result is transmitted to control unit；
If the comparison result of described step S30 is capacity V of described first compressor (11)1With described second compressor (21)
Capacity V2Unequal, then described step S20 comprises the steps：
S23：Set the second control temperature T2With the 3rd control temperature T3, and described second control temperature T2Less than the described 3rd control
Temperature T processed3, described heat exchange medium temperature T is controlled temperature T with described second respectively2With the described 3rd control temperature T3Compare,
And it is interval to determine that described heat exchange medium temperature T is located；
S24：Setup control pressure P, respectively by pressure at expulsion P of described first compressor (11)1With described second compressor (21)
Pressure at expulsion P2Compare with described control pressure P；
S25：If it is determined that described heat exchange medium temperature T is more than described 3rd control temperature T3, and the row of described first compressor (11)
Atmospheric pressure P1Or pressure at expulsion P of described second compressor (21)2More than described control pressure P, then controller closing described first
One that in compressor (11) and described second compressor (21), capacity is larger.
If 2. the method reducing Compressor Discharge Pressure according to claim 1 is it is characterised in that described step S30
Comparison result is capacity V of described first compressor (11)1Capacity V equal to described second compressor (21)2, then described
Step S20 comprises the steps：
S21：Set the first control temperature T1, by described heat exchange medium temperature T and described first control temperature T1Compare；
S22：Setup control pressure P, respectively by pressure at expulsion P of described first compressor (11)1With described second compressor (21)
Pressure at expulsion P2Compare with described control pressure P, if described heat exchange medium temperature T is more than described first control temperature T1, and institute
State pressure at expulsion P of the first compressor (11)1Pressure at expulsion P with described second compressor (21)2In arbitrary more than described control
Pressing pressure P, then close described first compressor (11) or described second compressor (21).
If 3. the method reducing Compressor Discharge Pressure according to claim 1 is it is characterised in that in described step S25
Judge that described heat exchange medium temperature T is more than described second control temperature T2And less than described 3rd control temperature T3, and described first
Pressure at expulsion P of compressor (11)1Or pressure at expulsion P of described second compressor (21)2More than described control pressure P, then control
Device cuts out less one of capacity in described first compressor (11) and described second compressor (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558063.4A CN104634028B (en) | 2013-11-11 | 2013-11-11 | Method for reducing exhaust pressure of compressors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558063.4A CN104634028B (en) | 2013-11-11 | 2013-11-11 | Method for reducing exhaust pressure of compressors |
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| Publication Number | Publication Date |
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| CN104634028A CN104634028A (en) | 2015-05-20 |
| CN104634028B true CN104634028B (en) | 2017-02-15 |
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| CN201310558063.4A Active CN104634028B (en) | 2013-11-11 | 2013-11-11 | Method for reducing exhaust pressure of compressors |
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| CN109682021B (en) * | 2018-12-13 | 2021-05-14 | 青岛海信日立空调系统有限公司 | Outdoor unit protection method and device and air conditioning system |
| CN110146318A (en) * | 2019-05-28 | 2019-08-20 | 格力电器（武汉）有限公司 | Solve the low method of air-conditioning entropy detection pressure testing power |
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