CN104964343B - A kind of device and method improving compressor operating reliability - Google Patents

A kind of device and method improving compressor operating reliability Download PDF

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Publication number
CN104964343B
CN104964343B CN201510325175.4A CN201510325175A CN104964343B CN 104964343 B CN104964343 B CN 104964343B CN 201510325175 A CN201510325175 A CN 201510325175A CN 104964343 B CN104964343 B CN 104964343B
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China
Prior art keywords
compressor
heat exchanger
valve
port
discharge superheat
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CN201510325175.4A
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Chinese (zh)
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CN104964343A (en
Inventor
舒文涛
许永锋
熊美兵
李波
杨元涛
万永强
钱小龙
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Priority to CN201510325175.4A priority Critical patent/CN104964343B/en
Publication of CN104964343A publication Critical patent/CN104964343A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0059Indoor units, e.g. fan coil units characterised by heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14Heat exchangers specially adapted for separate outdoor units
    • F24F1/16Arrangement or mounting thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • F24F11/84Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/10Pressure
    • F24F2140/12Heat-exchange fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature

Abstract

The present invention relates to airconditioning control field, more particularly to a kind of device and method improving compressor operating reliability.Including controller, compressor, four-way valve, outdoor air cooling heat exchanger, the first outdoor unit shut-off valve, the second outdoor unit shut-off valve, First Heat Exchanger and detection device, detection device obtains discharge superheat, controller adjusts the aperture for the flow control valve being connected with First Heat Exchanger according to discharge superheat, to control the gaseous coolant flow into First Heat Exchanger, the degree of superheat for improving return-air, makes the discharge superheat of the gaseous coolant of discharge compressor meet the requirements.Apparatus and method of the present invention can heat the liquid/gaseous state low temperature refrigerant for flowing to compressor, the discharge superheat of the gaseous coolant of discharge compressor is set to meet the requirements, so which kind of environment temperature no matter air conditioner be in, it can keep stablizing discharge superheat, to enhance the long-term running stability of air conditioner and reliability.

Description

A kind of device and method improving compressor operating reliability
Technical field
The present invention relates to airconditioning control field, more particularly to a kind of device and method improving compressor operating reliability.
Background technology
With the continuous development of society, living standards of the people are continuously improved, and air conditioner use, which has become in human lives, to be changed The requirement of kind office environment;Air conditioner has been widely used for family, hotel, dining room, office, workshop, computer room simultaneously Etc. different occasions.In use, since environment temperature is ever-changing, environment temperature many times has exceeded common air-conditioning Range of operation, especially for temperature it is lower in the case of there is still a need for air conditioner refrigerating (cryogenic refrigerations), or in ultralow temperature Air-conditioning heating outdoor unit frosting.Core component of the compressor as air-conditioning system, to the concentration of discharge superheat and refrigeration oil There is relatively high requirement, and needs defrost and interior machine failure to make interior machine flow control valve can not in cryogenic refrigeration, low-temperature heating In the case of normal control, the case where a large amount of liquid refrigerants can be caused to flow back into fluid reservoir and then enter compressor, and then go out Existing compressor liquid hammer and lubricating oil dilution so that compressor operating is bad, leads to compressor damage.
Invention content
Technical problem to be solved by the invention is to provide a kind of device and method improving compressor operating reliability, solutions The prior art of having determined is when cryogenic refrigeration or low-temperature heating need defrost, it may appear that discharge superheat deficiency so as to cause The technical issues of liquid refrigerants reflux compressor leads to compressor damage.
The technical solution that the present invention solves above-mentioned technical problem is as follows:A kind of device improving compressor operating reliability, Including controller, compressor, four-way valve, outdoor air cooling heat exchanger, the first outdoor unit shut-off valve, the second outdoor unit shut-off valve, the One heat exchanger and detection device for acquiring discharge superheat;
The compressor includes exhaust outlet and gas returning port;
The four-way valve includes exhaust port D, condensation port C, evaporator port E and air-breathing pipe port S, the exhaust end The exhaust outlet that mouth D passes through compressor described in the first piping connection;The air-breathing pipe port S connects the gas returning port of the compressor;
The outdoor air cooling heat exchanger arrival end connects the four-way valve and condenses port C, and outlet end connects first Room Outer machine shut-off valve;It is provided with outdoor fan on the outdoor air cooling heat exchanger;
The First Heat Exchanger arrival end is connected between the exhaust outlet of compressor and the outdoor air cooling heat exchanger Arbitrary node, outlet end connect the suction port S of the four-way valve by flow control valve;
The outlet end of the second outdoor unit shut-off valve connects the evaporator port E of the four-way valve;
The output end of the detection device connects the input terminal of the controller, and the controller output end connects the stream Adjustable valve.
The beneficial effects of the invention are as follows:The present invention provides a kind of device improving compressor operating reliability, the devices The degree of superheat of return-air can be not only increased to heating the liquid/gaseous state low temperature refrigerant for flowing to compressor, and can be with The discharge superheat into the gaseous coolant of compressor is set to meet the requirements so which kind of environment temperature no matter air conditioner be in, It can keep stablizing discharge superheat, to enhance the long-term running stability of air conditioner and reliability.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the detection device includes pressure sensor and temperature-detecting device, the pressure sensor and institute The output end for stating temperature-detecting device is all connected with the input terminal of the controller;The pressure sensor setting is in first pipe On the road, the pressure at expulsion for acquiring the compressor;The temperature-detecting device is positioned close to the exhaust of the compressor At mouthful, for acquiring the compressor exhaust temperature.
Further, the temperature-detecting device is temperature sensor or exhaust temperature sensing package.
Further, the temperature sensing package that the exhaust temperature sensing package includes casing and is plugged in described sleeve pipe, described sleeve pipe weldering The exhaust ports of the compressor are connected on, the silica gel for heat conduction is equipped between the temperature sensing package and described sleeve pipe.
Further, further include liquid storage device, the liquid storage device arrival end connects the four-way valve air-breathing pipe port S, outlet End connects the gas returning port of the compressor by the First Heat Exchanger.
Using the advantageous effect of above-mentioned further scheme:Gas coolant and liquid refrigerants can be divided using liquid storage device From the phenomenon that preventing air inlet pipe of the liquid refrigerants through compressor from entering, and cause liquid refrigerants liquid hazards compressor, to carry High functional reliability.
Further, further include oil eliminator, the oil eliminator includes arrival end, first exit end and second outlet End, the arrival end connect the exhaust outlet of the compressor, and the first exit end passes through four described in first piping connection The exhaust port D of port valve;The second outlet end is connected to gas returning port and the institute of the compressor by filter and capillary State the arbitrary node between First Heat Exchanger arrival end.
Advantageous effect using above-mentioned further scheme is:It can be the oil in compressor air-discharging using oil eliminator oil It separates out and, reduce the oil inlet quantity of system, avoid influence of the oil to system heat transfer, while may insure that lubricating oil returns to compressor Oil storage tank in, prevent compressor due to the shortage of lubricating oil and cause failure, extend all service life of compressor.
Further, the First Heat Exchanger arrival end is connected to the exhaust outlet of compressor and the four-way valve exhaust end Between mouth D;
Or the First Heat Exchanger arrival end is connected to the four-way valve condensation port C and the outdoor air cooling heat exchanger Between;
Or the First Heat Exchanger arrival end is connected between the exhaust outlet of compressor and oil eliminator arrival end;
Or the First Heat Exchanger arrival end is connected to the oil eliminator first exit end and the four-way valve exhaust Between the D of port.
Further, the First Heat Exchanger outlet end is connected to the liquid storage device arrival end and institute by flow control valve It states between four-way valve air-breathing pipe port S.
Further, it is provided with electronics between the outdoor air cooling heat exchanger outlet end and the first outdoor unit shut-off valve Throttle part;The electronic throttle component is capillary, electric expansion valve or heating power expansion valve.
Advantageous effect using above-mentioned further scheme is:Either electric expansion valve or heating power expansion valve have capillary Good throttling action, wherein the degree of supercooling control that the aperture of electric expansion valve and heating power expansion valve can be as needed, and capillary The production cost of pipe is low, assembly is simple and convenient.
Further, the First Heat Exchanger is plate heat exchanger, inside and outside fin heat exchanger or scaling tubular type heat exchanger.It is right In the heat exchange of gas-gas, the specific preferable technique effect of above-mentioned three kinds of heat exchangers.
A method of compressor operating reliability being improved, the method utilizes devices discussed above, the method packet Include following steps:
Step 1, after heat pump air conditioning system compressor starts are run, the pressure at expulsion when detection device detection is run Pc, and table is corresponded to according to pressure-saturation temperature and finds the pressure at expulsion PcCorresponding saturation temperature Tb
Step 2, the detection device detection delivery temperature Tc
Step 3, by the saturation temperature TbWith the delivery temperature TcComparison, calculates current discharge superheat Tdsh= Tc-Tb
Step 4, the size of the discharge superheat and preset value, and the flow-rate adjustment is controlled according to judging result The open and-shut mode of valve.
Further, the step 4 is specially:
Step 401, judge the discharge superheat TdshWhether the first preset value is not less than, if so, keeping flow-rate adjustment Valve is to shut state, until detecting the discharge superheat TdshLess than first preset value, the flow control valve is opened It opens to initial opening a;
At interval of 1min, repeat to detect discharge superheat TdshIf discharge superheat TdshIt is pre- still less than described first If value, then continue out large flux control valve, open big aperture b every time, until opening to maximum or checking discharge superheat TdshIt is not small In first preset value;
At interval of 1min, repetition detects the discharge superheat Tdsh, as the discharge superheat TdshIt is default more than second After value, adjusts flow control valve and close step number b every 30S, until shutting completely or discharge superheat TdshIt is default less than second Value.
Further, first preset value is 15 DEG C, and the second preset value is 20 DEG C.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the device improving compressor operating reliability of the present embodiment 1;
Fig. 2 is a kind of flow diagram for the method improving compressor operating reliability of the present embodiment 1;
Fig. 3 is a kind of structural schematic diagram for the device improving compressor operating reliability of the present embodiment 2;
Fig. 4 is a kind of structural schematic diagram for the device improving compressor operating reliability of the present embodiment 3;
Fig. 5 is a kind of structural schematic diagram for the device improving compressor operating reliability of the present embodiment 4;
In attached drawing, parts list represented by the reference numerals are as follows:
11, compressor, 12, oil eliminator, 13, four-way valve, 14, pressure sensor, 15, outdoor air cooling heat exchanger, 16, electricity Sub- throttle part, 17, flow control valve, 18, First Heat Exchanger, 19 fluid reservoirs, 20, temperature-detecting device, the 21, first outdoor unit Shut-off valve, the 22, second outdoor unit shut-off valve, the 23, first pipeline.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and It is non-to be used to limit the scope of the present invention.
As shown in Figure 1, for a kind of structural schematic diagram for the device improving compressor operating reliability of the present invention, including control Device (being not drawn into figure), compressor 11, four-way valve 13, outdoor air cooling heat exchanger 15, the first outdoor unit shut-off valve 21, outside second Room Machine shut-off valve 22, First Heat Exchanger 18 and detection device;The compressor 11 includes exhaust outlet and gas returning port;The four-way valve 13 Pass through the first pipeline 23 including exhaust port D, condensation port C, evaporator port E and air-breathing pipe port S, the exhaust port D Connect the exhaust outlet of the compressor 11;The air-breathing pipe port S connects the gas returning port of the compressor 11;The outdoor is air-cooled 15 arrival end of heat exchanger connects the four-way valve 13 and condenses port C, and outlet end connects the first outdoor unit shut-off valve 21;It is described It is provided with outdoor fan on outdoor air cooling heat exchanger 15;The outlet end of the second outdoor unit shut-off valve 22 connects the four-way valve 13 evaporator port E;The output end of the detection device connects the input terminal of the controller, and the controller output end connects The flow control valve 17 is connect, the detection device is for acquiring discharge superheat.
In the present embodiment, the detection device includes pressure sensor 14 and temperature-detecting device 20, the pressure sensing The output end of device 14 and the temperature-detecting device 20 is all connected with the input terminal of the controller;The pressure sensor 14 is arranged On first pipeline 23, the pressure at expulsion for acquiring the compressor 11;The temperature-detecting device 20 setting by The exhaust ports of the nearly compressor 11, for acquiring 11 delivery temperature of the compressor.When pressure sensor detection 14 to sky After pressure at expulsion Pc when adjusting system is run, table is corresponded to by pressure-saturation temperature and finds corresponding saturation temperature Tb;Temperature simultaneously Degree detection device 20 detects delivery temperature Tc, you can current discharge superheat Tdsh=Tc-Tb is calculated.In other realities It applies in example, also can by other means, for example calculation obtains discharge superheat, and these modes are in the protection of the present invention Within the scope of.Preferably, the temperature-detecting device 20 can be temperature sensor, and the temperature sensor is thermistor, Thermistor has many advantages, such as that small, high sensitivity, stability is good, easy processing molding, the biography using thermistor as temperature Sensor detects delivery temperature Tb, can effectively ensure the accuracy of testing result.In other embodiments, the temperature detection Device 20 can also be exhaust temperature sensing package, the temperature sensing package that the exhaust temperature sensing package includes casing and is plugged in described sleeve pipe, institute The exhaust ports that casing is welded on the compressor 11 are stated, the silicon for heat conduction is equipped between the temperature sensing package and described sleeve pipe Glue.
Preferably, in the present embodiment further include liquid storage device 19 and oil eliminator 12,19 arrival end of liquid storage device connection institute 13 air-breathing pipe port S of four-way valve is stated, outlet end connects the gas returning port of the compressor 11 by the First Heat Exchanger 18.This reality It applies in example, gas coolant can be detached using liquid storage device with liquid refrigerants, prevent air inlet of the liquid refrigerants through compressor Pipe enters, and the phenomenon that cause liquid refrigerants liquid hazards compressor, to improve functional reliability.In the present embodiment, institute It includes arrival end, first exit end and second outlet end to state oil eliminator 12, and the arrival end connects the row of the compressor 11 Gas port, the first exit end connect the exhaust port D of the four-way valve 13 by first pipeline 23;The second outlet End is connected to by filter and capillary between 18 arrival end of gas returning port and the First Heat Exchanger of the compressor 11 Arbitrary node.The oil in compressor air-discharging can be separated using oil eliminator oil, reduces the oil inlet quantity of system, avoid oil Influence to system heat transfer, while may insure that lubricating oil returns in the oil storage tank of compressor, prevent compressor due to lubrication Oil shortage and cause failure, extend all service life of compressor.
18 arrival end of the First Heat Exchanger is connected to 11 exhaust outlet of the compressor and the outdoor air cooling heat exchanger 15 Between arbitrary node, outlet end connects the suction port S of the four-way valve 13 by flow control valve 17.Not according to structure Together, the First Heat Exchanger 18 has a variety of connection structures.There is no oil eliminator, the First Heat Exchanger 18 in embodiment 2 Arrival end is connected between 13 exhaust port D of 11 exhaust outlet of the compressor and the four-way valve, as shown in Figure 3;Embodiment 3 In, 18 arrival end of the First Heat Exchanger be connected to the four-way valve 13 condense port C and the outdoor air cooling heat exchanger 15 it Between, as shown in Figure 4.Oil eliminator 12 is equipped in embodiment 4,18 arrival end of the First Heat Exchanger is connected to the compressor 11 Between 12 arrival end of exhaust outlet and oil eliminator, as shown in Figure 5;And in the present embodiment 1,18 arrival end of the First Heat Exchanger connects It is connected between 13 exhaust port D of 12 first exit end of the oil eliminator and the four-way valve, as shown in Figure 1.In the present embodiment In, 18 outlet end of the First Heat Exchanger is connected to 19 arrival end of the liquid storage device and the four-way valve by flow control valve 17 Between 13 air-breathing pipe port S, as shown in Figure 1.The flow control valve 17 is capillary, electric expansion valve or heating power expansion valve.
Preferably, in the present embodiment, outdoor 15 outlet end of air cooling heat exchanger and the first outdoor unit shut-off valve 21 Between be provided with electronic throttle component 16;The electronic throttle component 16 is capillary, electric expansion valve or heating power expansion valve.Hair Either electric expansion valve or heating power expansion valve have good throttling action to tubule, wherein electric expansion valve and thermal expansion The aperture of valve can be as needed degree of supercooling control, and the production cost of capillary it is low, assembly it is simple and convenient.
Preferably, First Heat Exchanger 18 described in the present embodiment is plate heat exchanger, inside and outside fin heat exchanger or shaped telescopic tube Any one of formula heat exchanger.Height may be implemented in the plate heat exchanger, inside and outside fin heat exchanger or scaling tubular type heat exchanger The heat exchange of wet body and cryogenic gas, and there is preferable heat transfer effect.
The principle of the present invention is as follows:Gaseous coolant does work through compressor 11 becomes the gaseous coolant of high temperature and pressure, and high temperature is high The gaseous coolant of pressure condenses after oil eliminator 12, four-way valve 13 in outdoor air cooling heat exchanger 15, and through electronic throttle portion The middle evaporation of air cooling heat exchanger (being not drawn into figure), gaseous coolant or the liquid for becoming low-temp low-pressure are cold indoors after part 16 throttles Matchmaker, the gaseous coolant or liquid refrigerants of low-temp low-pressure return to pressure after the second outdoor unit shut-off valve 22, four-way valve 13, fluid reservoir 19 Contracting machine 11.First Heat Exchanger 18 and flow control valve 17 are increased in the present invention, the part high temperature formed through the acting of compressor 11 High-pressure gaseous refrigerant enters First Heat Exchanger 18 after oil eliminator;Simultaneously the low temperature to be formed is evaporated by indoor air cooling heat exchanger Low-pressure gaseous refrigerant or liquid refrigerants also enter First Heat Exchanger 18, and are thermally formed by the high pressure gaseous refrigerant The gaseous coolant that the degree of superheat is met the requirements, the gaseous coolant return to compressor 11 after four-way valve 13, fluid reservoir 19.Pass through Increase First Heat Exchanger, can heat the low temperature liquid refrigerant or gaseous coolant that flow to compressor 11 becomes moderate temperature Gaseous coolant;Meanwhile flow control valve and controller are provided in the present invention, the unlatching of flow control valve is controlled by controller Degree controls the cold medium flux into First Heat Exchanger, and the discharge superheat to control compressor meets the safe mistake of compressor Temperature requirement ensures that compressor can safely and reliably be run in various environment.
As shown in Fig. 2, for a kind of flow diagram for the method improving compressor operating reliability of the present invention, including it is following Step:
Step 1, after heat pump air conditioning system compressor starts are run, the pressure at expulsion when detection device detection is run Pc, and table is corresponded to according to pressure-saturation temperature and finds the pressure at expulsion PcCorresponding saturation temperature Tb;In the present embodiment, use Pressure at expulsion P when the detection operation of pressure sensor 14c
Step 2, the detection device detection delivery temperature Tc;In the present embodiment, is detected and arranged using temperature-detecting device 20 Temperature degree Tc
Step 3, by the saturation temperature TbWith the delivery temperature TcComparison, calculates current discharge superheat Tdsh= Tc-Tb
Step 4, the size of the discharge superheat and preset value, and the flow-rate adjustment is controlled according to judging result The open and-shut mode of valve 17.
In the present embodiment, the step 4 is specially:
Step 401, judge the discharge superheat TdshWhether the first preset value is not less than, if so, keeping flow-rate adjustment Valve 17 is to shut state, until detecting the discharge superheat TdshLess than first preset value, by the flow control valve 17 are opened into initial opening a;
At interval of 1min, repeat to detect discharge superheat TdshIf discharge superheat TdshIt is pre- still less than described first If value, then continue out large flux control valve 17, open big aperture b every time, until opening to maximum or checking discharge superheat TdshNo Less than first preset value;
At interval of 1min, repetition detects the discharge superheat Tdsh, as the discharge superheat TdshIt is default more than second After value, adjusts flow control valve 17 and close step number b every 30S, until shutting completely or discharge superheat TdshIt is pre- less than second If value.
In the present embodiment, first preset value is 15 DEG C, and the second preset value is 20 DEG C.15 DEG C in above-described embodiment, 20 DEG C and initial opening a, aperture b it is equivalent, can be modified according to actual conditions in other specific embodiments, these Modification is all fallen within protection scope of the present invention.
The present invention provides a kind of devices improving compressor operating reliability, which can be to that will flow to compressor Liquid/gaseous state low temperature refrigerant is heated, and improves the return-air degree of superheat, and then make the discharge superheat of the gaseous coolant of discharge compressor Degree is met the requirements so which kind of environment temperature no matter air conditioner be in, and can keep stablizing discharge superheat, to enhance air-conditioning The long-term running stability of device and reliability.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;Can be that machinery connects It connects, can also be electrical connection;It can be directly connected, can also can be indirectly connected through an intermediary in two elements The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims (10)

1. a kind of device improving compressor operating reliability, it is characterised in that:Including controller, compressor (11), four-way valve (13), outdoor air cooling heat exchanger (15), the first outdoor unit shut-off valve (21), the second outdoor unit shut-off valve (22), First Heat Exchanger (18) and the detection device for acquiring discharge superheat;
The compressor (11) includes exhaust outlet and gas returning port;
The four-way valve (13) includes exhaust port D, condensation port C, evaporator port E and air-breathing pipe port S, the exhaust end Mouth D passes through the exhaust outlet that the first pipeline (23) connects the compressor (11);The air-breathing pipe port S connections compressor (11) gas returning port;
Described outdoor air cooling heat exchanger (15) arrival end connects the four-way valve (13) and condenses port C, outlet end connection described the One outdoor unit shut-off valve (21);It is provided with outdoor fan on the outdoor air cooling heat exchanger (15);
First Heat Exchanger (18) arrival end is connected to the compressor (11) exhaust outlet and the outdoor air cooling heat exchanger (15) arbitrary node between, outlet end connect the suction port S of the four-way valve (13) by flow control valve (17);
The outlet end of the second outdoor unit shut-off valve (22) connects the evaporator port E of the four-way valve (13);
The output end of the detection device connects the input terminal of the controller, and the controller output end connects the flow tune Save valve (17).
2. the device according to claim 1 for improving compressor operating reliability, it is characterised in that:The detection device packet Include pressure sensor (14) and temperature-detecting device (20), the pressure sensor (14) and the temperature-detecting device (20) Output end is all connected with the input terminal of the controller;The pressure sensor (14) is arranged on first pipeline (23), uses In the pressure at expulsion for acquiring the compressor (11);The temperature-detecting device (20) is positioned close to the compressor (11) Exhaust ports, for acquiring the compressor (11) delivery temperature.
3. the device according to claim 2 for improving compressor operating reliability, it is characterised in that:The First Heat Exchanger (18) it is plate heat exchanger, inside and outside fin heat exchanger or scaling tubular type heat exchanger;The temperature-detecting device (20) passes for temperature Sensor or exhaust temperature sensing package.
4. according to the device of any raising compressor operating reliability of claims 1 to 3, it is characterised in that:Further include Liquid storage device (19), liquid storage device (19) arrival end connect four-way valve (13) the air-breathing pipe port S, and outlet end passes through described the One heat exchanger (18) connects the gas returning port of the compressor (11).
5. the device according to claim 4 for improving compressor operating reliability, it is characterised in that:It further include oil eliminator (12), the oil eliminator (12) includes arrival end, first exit end and second outlet end, and the arrival end connects the compression The exhaust outlet of machine (11), the first exit end connect the exhaust port of the four-way valve (13) by first pipeline (23) D;The second outlet end is connected to the gas returning port of the compressor (11) and first heat exchange by filter and capillary Arbitrary node between device (18) arrival end.
6. the device according to claim 5 for improving compressor operating reliability, it is characterised in that:The First Heat Exchanger (18) arrival end is connected between the compressor (11) exhaust outlet and the four-way valve (13) exhaust port D;
Or First Heat Exchanger (18) arrival end is connected to the four-way valve (13) condensation port C and the outdoor is air-cooled changes Between hot device (15);
Or First Heat Exchanger (18) arrival end is connected to the compressor (11) exhaust outlet and oil eliminator (12) entrance Between end;
Or First Heat Exchanger (18) arrival end is connected to the oil eliminator (12) first exit end and the four-way valve (13) between exhaust port D.
7. the device according to claim 5 for improving compressor operating reliability, it is characterised in that:The outdoor is air-cooled to be changed It is provided with electronic throttle component (16) between hot device (15) outlet end and the first outdoor unit shut-off valve (21);The electronics section Stream unit (16) is capillary, electric expansion valve or heating power expansion valve.
8. a kind of method improving compressor operating reliability, the method utilizes any device of claim 1~7, It the described method comprises the following steps:
Step 1, after heat pump air conditioning system compressor starts are run, the pressure at expulsion P when detection device detection is runc, and Table, which is corresponded to, according to pressure-saturation temperature finds the pressure at expulsion PcCorresponding saturation temperature Tb
Step 2, the detection device detection delivery temperature Tc
Step 3, by the saturation temperature TbWith the delivery temperature TcComparison, calculates current discharge superheat Tdsh=Tc-Tb
Step 4, the size of the discharge superheat and preset value, and the flow control valve is controlled according to judging result (17) open and-shut mode.
9. according to the method described in claim 8, it is characterized in that, the step 4 is specially:
Step 401, judge the discharge superheat TdshWhether the first preset value is not less than, if so, keeping flow control valve (17) it is to shut state, until detecting the discharge superheat TdshLess than first preset value, by the flow control valve (17) it is opened into initial opening a;
At interval of 1min, repeat to detect discharge superheat TdshIf discharge superheat TdshStill less than first preset value, Then continue out the big flow control valve (17), open big aperture b every time, until opening to maximum or checking discharge superheat Tdsh Not less than first preset value;
At interval of 1min, repetition detects the discharge superheat Tdsh, as the discharge superheat TdshAfter the second preset value, It adjusts flow control valve (17) and closes step number b every 30S, until shutting completely or discharge superheat TdshLess than described second Preset value.
10. according to the method described in claim 9, it is characterized in that:First preset value is 15 DEG C, and the second preset value is 20 ℃。
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