CN105737424A - Cooling-heating air conditioner and control method thereof - Google Patents

Cooling-heating air conditioner and control method thereof Download PDF

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Publication number
CN105737424A
CN105737424A CN201610286094.2A CN201610286094A CN105737424A CN 105737424 A CN105737424 A CN 105737424A CN 201610286094 A CN201610286094 A CN 201610286094A CN 105737424 A CN105737424 A CN 105737424A
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CN
China
Prior art keywords
cylinder
heating
air conditioner
heat exchanger
valve port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610286094.2A
Other languages
Chinese (zh)
Inventor
赵强
刘湍顺
杨亚新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Guangdong Midea Refrigeration Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201610286094.2A priority Critical patent/CN105737424A/en
Priority claimed from PCT/CN2016/087934 external-priority patent/WO2017185515A1/en
Publication of CN105737424A publication Critical patent/CN105737424A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F25B1/00Compression machines, plant, or systems with non-reversible cycle
    • F25B1/10Compression machines, plant, or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • 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
    • F25B43/006Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat accumulators
    • 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
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • F25B49/022Compressor control arrangements
    • 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
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/025Compressor control by controlling speed
    • F25B2600/0253Compressor control by controlling speed with variable speed
    • 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
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2106Temperatures of fresh outdoor air
    • 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
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2115Temperatures of a compressor or the drive means therefor
    • F25B2700/21152Temperatures of a compressor or the drive means therefor at the discharge side of the compressor

Abstract

The invention discloses a cooling-heating air conditioner and a control method thereof. The cooling-heating air conditioner comprises a two-cylinder compressor, a reversing assembly, an outdoor heat exchanger, an indoor heat exchanger, a gas-liquid separator, a control valve and a refrigerant radiator, wherein the control valve is connected in parallel with the refrigerant radiator; the gas suction port of a first cylinder is communicated with a first reservoir; the displacement volume ratio of the second cylinder to the first cylinder is 1-10 percent; the reversing assembly comprises first to fourth valve ports; the fourth valve port is connected with the first reservoir; the gas-liquid separator comprises a gas outlet, a first interface and a second interface; the gas outlet is connected with the second cylinder; a first throttling element with a constant aperture is connected in series between the first interface and the outdoor heat exchanger; a second throttling element with a constant aperture is connected in series between the second interface and the indoor heat exchanger; the refrigerant radiator and the control valve which are connected in parallel are connected in series between the outdoor heat exchanger and the first throttling element. By adopting the cooling-heating air conditioner, the energy efficiency of the air conditioner is increased efficiently.

Description

Heating and air conditioner and control method thereof
Technical field
The present invention relates to refrigerating field, especially relate to a kind of heating and air conditioner and control method thereof.
Background technology
Gaseous refrigerant after throttling and before entering vaporizer is not optimized cyclic design by current air-conditioning refrigeration system, causes that gaseous refrigerant affects evaporator heat exchange performance, and increases compressor compresses power consumption, thus having influence on energy efficiency of air conditioner level.Air injection enthalpy-increasing and Two-stage Compression technology can improve air conditioning system heating capacity level under low temperature and ultralow temperature, but for the commonly used cooling condition of air-conditioning, efficiency promotes very limited.
Summary of the invention
It is contemplated that one of technical problem solved at least to a certain extent in correlation technique.
For this, the present invention proposes a kind of heating and air conditioner, it is possible to is effectively improved energy efficiency of air conditioner, effectively facilitates energy-saving and emission-reduction.
The present invention also proposes the control method of a kind of above-mentioned heating and air conditioner.
Heating and air conditioner according to embodiments of the present invention, including: duplex cylinder compressor, described duplex cylinder compressor includes housing, the first cylinder, the second cylinder and the first reservoir, described housing is provided with air vent, described first cylinder and described second cylinder are respectively provided in described housing, described first reservoir is located at outside described housing, the air entry of described first cylinder connects with described first reservoir, and the span of the delivery space ratio of described second cylinder and described first cylinder is 1%~10%;Commutation assembly, described commutation assembly includes the first valve port to the 4th valve port, one of them connection in described first valve port and the second valve port and the 3rd valve port, described 4th valve port connects with another in described second valve port and described 3rd valve port, described first valve port is connected with described air vent, and described 4th valve port is connected with described first reservoir;Outdoor heat exchanger and indoor heat exchanger, the first end of described outdoor heat exchanger is connected with described second valve port, and the first end of described indoor heat exchanger is connected with described 3rd valve port;Gas-liquid separator, described gas-liquid separator includes gas outlet, first interface and the second interface, described gas outlet is connected with the air entry of described second cylinder, described first interface is connected with the second end of described outdoor heat exchanger, described second interface is connected with the second end of described indoor heat exchanger, it is in series with the first throttle element of fixing aperture between described first interface and described outdoor heat exchanger, between described second interface and described indoor heat exchanger, is in series with the second section fluid element of fixing aperture;What be connected in parallel controls valve and the coolant radiator for electric control element is dispelled the heat, the described coolant radiator being connected in parallel and described control valve are connected between described outdoor heat exchanger and described first throttle element, the circulation of described control valve cut-off coolant during refrigeration, when heating, coolant flows through described control valve.
Heating and air conditioner according to embodiments of the present invention, by arranging above-mentioned duplex cylinder compressor, energy efficiency of air conditioner can be effectively improved, effectively facilitate energy-saving and emission-reduction, simultaneously by arranging gas-liquid separator, it is possible to improve heat exchange efficiency, reduce compressor compresses power consumption, improve air-conditioner ability and efficiency further, further through arranging control valve and coolant radiator, be possible not only to electric control element is carried out effective temperature-reducing and can avoid electric control element that dew condensation phenomenon occurs.
In some embodiments of the invention, it is in series with electromagnetic valve between the air entry of described gas outlet and described second cylinder.
In some embodiments of the invention, the span of gas-liquid separator volume is 100mL-500mL.
In some embodiments of the invention, described control valve is the check valve of one-way conduction on from described first throttle element to the direction of described outdoor heat exchanger.
In some embodiments of the invention, described duplex cylinder compressor also includes the second reservoir being located at outside described housing, and described second reservoir is connected between the air entry of described gas outlet and described second cylinder.
Preferably, the volume of described first reservoir is more than the volume of the second reservoir.
The control method of heating and air conditioner according to embodiments of the present invention, heating and air conditioner is heating and air conditioner according to the above embodiment of the present invention, adjusting the running frequency of described duplex cylinder compressor to satisfying condition according to the compressor operation parameters detected and/or outdoor environment temperature when comprising the steps: refrigeration or heating operation, wherein said compressor operation parameters includes at least one in running current, pressure at expulsion, delivery temperature.
The control method of heating and air conditioner according to embodiments of the present invention, by adjusting the running frequency of compressor in running according to testing result, such that it is able to let the system operate in suitable parameter area, improves air-conditioner reliability of operation.
In some embodiments of the invention, preset multiple different delivery temperature interval, the regulating command of the running frequency that the plurality of delivery temperature interval is corresponding is different, and detection delivery temperature also regulates described running frequency according to the regulating command that the delivery temperature interval at the delivery temperature place detected is corresponding.
In some embodiments of the invention, preset multiple outdoor temperatures interval, heat stoppage protection electric current and refrigeration stoppage protection electric current, the limit frequency protective current that multiple outdoor temperature intervals are corresponding different, first outdoor environment temperature is detected, then the limit frequency protective current of correspondence is obtained according to the outdoor temperature interval at the described outdoor environment temperature place detected, adjust described running frequency so that actually detected to running current reach corresponding described limit frequency protective current, then directly shut down when the described running current wherein detected when cooling is more than described refrigeration stoppage protection electric current;The described running current detected when heating more than described heat stoppage protection electric current time then directly shut down.
In some embodiments of the invention, preset multiple different pressure at expulsion interval, the regulating command of the running frequency that the plurality of pressure at expulsion interval is corresponding is different, and detection pressure at expulsion also regulates described running frequency according to the regulating command that the pressure at expulsion interval at the pressure at expulsion place detected is corresponding.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of heating and air conditioner according to embodiments of the present invention;
Fig. 2 is the schematic diagram of the heating and air conditioner being provided with the second reservoir according to embodiments of the present invention;
Fig. 3 is the schematic diagram of the heating and air conditioner being provided with electromagnetic valve and the second reservoir according to embodiments of the present invention;
Fig. 4 is the schematic diagram of duplex cylinder compressor according to embodiments of the present invention;
Fig. 5 is the flow chart of the control method of heating and air conditioner according to embodiments of the present invention.
Accompanying drawing labelling:
Heating and air conditioner 100,
Duplex cylinder compressor 1, housing the 10, first cylinder the 11, second cylinder the 12, first reservoir the 13, second reservoir 14, air vent 15,
Commutation assembly the 2, first valve port D, the second valve port C, the 3rd valve port E, the 4th valve port S,
Outdoor heat exchanger 3, indoor heat exchanger 4,
Gas-liquid separator 5, gas outlet m, first interface f, the second interface g,
First throttle element 6, second section fluid element 7,
Control valve 8, coolant radiator 9,
Electromagnetic valve 20.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, for instance two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral;Can be mechanically connected, it is also possible to be electrical connection or each other can communication;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
Heating and air conditioner 100 according to embodiments of the present invention being described in detail below with reference to Fig. 1-Fig. 4, wherein heating and air conditioner 100 has refrigeration mode and heating mode.
As Figure 1-Figure 4, heating and air conditioner 100 according to embodiments of the present invention, including: duplex cylinder compressor 1, commutation assembly 2, outdoor heat exchanger 3 and indoor heat exchanger 4, gas-liquid separator 5, first throttle element 6, second section fluid element 7, control valve 8 and coolant radiator 9.Wherein duplex cylinder compressor 1 includes housing the 10, first cylinder the 11, second cylinder 12 and the first reservoir 13, housing 10 is provided with air vent 15, first cylinder 11 and the second cylinder 12 are respectively provided in housing 10, first reservoir 13 is located at outside housing 10, and air entry and first reservoir 13 of the first cylinder 11 connect.It is to say, the first cylinder 11 and the second cylinder 12 carry out independent compression process, coolant after the compression that the first cylinder 11 is discharged and the coolant after the compression discharged from the second cylinder 12 are drained into respectively in housing 10 and then discharge from air vent 15.
The span of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 1%~10%.Further, the span of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 1%~9%, it is preferable that the span of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 4%~9%.The such as delivery space ratio of the second cylinder 12 and the first cylinder 11 can be the parameter such as 4%, 5%, 8% or 8.5%.
Commutation assembly 2 includes the first valve port D to the 4th valve port S, one of them connection in first valve port D and the second valve port C and the 3rd valve port E, another connection in 4th valve port S and the second valve port C and described 3rd valve port E, first valve port D is connected with air vent 15, and the 4th valve port S and the first reservoir 13 are connected.First end of outdoor heat exchanger 3 and the second valve port C are connected, and the first end of indoor heat exchanger 4 and the 3rd valve port E are connected.Specifically, when heating and air conditioner 100 is freezed, the first valve port D and the second valve port C connection and the 3rd valve port E and the four valve port S connect, and when heating and air conditioner 100 heats, the first valve port D and the three valve port E connection and the second valve port C and the four valve port S connect.Preferably, commutation assembly 2 is cross valve.
Gas-liquid separator 5 includes gas outlet m, first interface f and the second interface g, the air entry of gas outlet m and the second cylinder 12 is connected, first interface f is connected with the second end of outdoor heat exchanger 3, second interface g is connected with the second end of indoor heat exchanger 4, it is in series with the adjustable first throttle element 6 of aperture between first interface f and outdoor heat exchanger 3, between the second interface g and indoor heat exchanger 4, is in series with the adjustable second section fluid element 7 of aperture.Alternatively, first throttle element 6 is electric expansion valve, and second section fluid element 7 is electric expansion valve, it is of course possible to be understood by, and first throttle element 6 and second section fluid element 7 all can also is that other apertures adjustable element such as heating power expansion valve.
Coolant radiator 9 is for dispelling the heat to electric control element, and the coolant radiator 9 and the control valve 8 that are connected in parallel are connected between outdoor heat exchanger 3 and first throttle element 6, control valve 8 and end the circulation of coolant during refrigeration, and when heating, coolant flows through control valve 8.That is, control valve 8 and be connected between outdoor heat exchanger 3 and first throttle element 6, coolant radiator 9 is connected between outdoor heat exchanger 3 and first throttle element 6, controls valve 8 and coolant radiator 9 is connected in parallel, and coolant radiator 9 is for dispelling the heat to electric control element.Alternatively, controlling valve 8 is from first throttle element 6 to the check valve of one-way conduction on the direction of outdoor heat exchanger 3.Can also electromagnetic valve of course, it should be understood that control valve 8.As long as it is understood that the structure of coolant radiator 9 can be varied coolant that can circulate, for instance coolant radiator 9 can include the metal tube extended that wriggles.
When heating and air conditioner 100 is freezed, the High Temperature High Pressure coolant discharged from the air vent 15 of duplex cylinder compressor 1 is drained into outdoor heat exchanger 3 by the first valve port D and the second valve port C and carries out condensation heat radiation, the circulation of coolant is ended owing to controlling valve 8, the liquid refrigerants that heat exchanger 3 is discharged outdoor flows in coolant radiator 9 and carries out heat exchange with electric control element, thus realizing reducing the purpose of the temperature of electric control element.The coolant flowed out from coolant radiator 9 is drained into gas-liquid separator 5 from first interface f after the one-level reducing pressure by regulating flow of first throttle element 6 and carries out gas-liquid separation, and the intermediate pressure gaseous coolant separated is drained in the second cylinder 12 from gas outlet m and is compressed.
It is drained into after the two-step throttle blood pressure lowering of second section fluid element 7 in indoor heat exchanger 4 from the second interface g of gas-liquid separator 5 intermediate pressure liquid coolant discharged and carries out heat exchange to reduce indoor environment temperature, the coolant that heat exchanger 4 is discharged indoor is drained in the first reservoir 13 by the 3rd valve port E and the four valve port S, is drained in the first cylinder 11 from the coolant of the first reservoir 13 discharge and is compressed.
When heating and air conditioner 100 heats, the High Temperature High Pressure coolant discharged from the air vent 15 of duplex cylinder compressor 1 is drained into indoor heat exchanger 4 by the first valve port D and the three valve port E and carries out condensation heat radiation to raise indoor environment temperature, the high-pressure liquid coolant that heat exchanger 4 is discharged indoor is drained into gas-liquid separator 5 from the second interface g after the one-level reducing pressure by regulating flow of second section fluid element 7 and carries out gas-liquid separation, and the intermediate pressure gaseous coolant separated is drained in the second cylinder 12 from gas outlet m and is compressed.
Turn on owing to controlling valve 8, from the first interface f of the gas-liquid separator 5 intermediate pressure liquid coolant discharged after the two-step throttle blood pressure lowering of first throttle element 6, major part coolant is drained in outdoor heat exchanger 3 carries out heat exchange by controlling valve 8, the coolant that heat exchanger 3 is discharged outdoor is drained in the first reservoir 13 by the second valve port C and the four valve port S, is drained in the first cylinder 11 from the coolant of the first reservoir 13 discharge and is compressed.
It is to say, when heating and air conditioner 100 is freezed, end the circulation of coolant owing to controlling valve 8, the coolant that therefore heat exchanger 3 is discharged outdoor is flowed in coolant radiator 9 and electric control element carries out heat exchange, thus realizing reducing the purpose of the temperature of electric control element.When heating and air conditioner 100 heats, turn on owing to controlling valve 8, the most of coolant discharged from first throttle element 6 is drained into outdoor heat exchanger 3 through controlling valve 8, only sub-fraction or do not have coolant to flow through coolant radiator 9, such that it is able to the coolant avoiding temperature too low flows through coolant radiator 9 and dew condensation phenomenon occurs thus reducing the service life of electric control element.
Thus analyze known, when heating and air conditioner 100 is run, the coolant of different pressures state has respectively entered in the first cylinder 11 and the second cylinder 12, first cylinder 11 and the second cylinder 12 complete independently compression process, coolant after the compression that the first cylinder 11 is discharged and the coolant after the compression discharged from the second cylinder 12 are discharged in housing 10 and discharge from air vent 15 after mixing, simultaneously because the span of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 1%~10%, the coolant that flow is less and pressure state is higher is drained in the second cylinder 12 that delivery space is less and is compressed, such that it is able to raising efficiency, energy-saving and emission-reduction.
Simultaneously by being provided with gas-liquid separator 5 between outdoor heat exchanger 3 and indoor heat exchanger 4, it is compressed thus gas-liquid separator 5 is expelled back into after being separated by a part of gaseous coolant in the second cylinder 12, gas content in being flowed into the gas content in the coolant of indoor heat exchanger 4 when thus reducing refrigeration and reducing the coolant being flowed into outdoor heat exchanger 3 when heating, decrease the gaseous coolant impact on the heat exchange property as the indoor heat exchanger 4 of vaporizer or outdoor heat exchanger 3, such that it is able to raising heat exchange efficiency, reduce compressor compresses power consumption.
Heating and air conditioner 100 according to embodiments of the present invention, by arranging above-mentioned duplex cylinder compressor 1, energy efficiency of air conditioner can be effectively improved, effectively facilitate energy-saving and emission-reduction, simultaneously by arranging gas-liquid separator 5, it is possible to improve heat exchange efficiency, reduce compressor compresses power consumption, improve air-conditioner ability and efficiency further, again owing to arranging control valve 8 and coolant radiator 9, be possible not only to electric control element is carried out effective temperature-reducing and can avoid electric control element that dew condensation phenomenon occurs.
As shown in Figure 3, in some embodiments of the invention, it is in series with electromagnetic valve 20 between the air entry of gas outlet m and the second cylinder 12, thus when the liquid coolant in gas-liquid separator 5 is beyond safety levels, liquid refrigerants can be avoided to enter in the second cylinder 12 by closing electromagnetic valve 20, such that it is able to avoid duplex cylinder compressor 1 that liquid hammer occurs, extend the service life of duplex cylinder compressor 1.It is possible to further arranging liquid level sensor on gas-liquid separator 5, controlled the open and-shut mode of electromagnetic valve 20 by the testing result of liquid level sensor.
In some embodiments of the invention, the span of the volume of gas-liquid separator 5 is 100mL-500mL.
In some embodiments of the invention, as shown in Figures 2 and 3, duplex cylinder compressor 1 also includes the second reservoir 14 being located at outside housing 10, and the second reservoir 14 is connected between the air entry of gas outlet m and the second cylinder 12.Thereby through being provided with the second reservoir 14, further gas-liquid separation can be carried out to from the gas outlet m of gas-liquid separator 5 coolant discharged, liquid coolant can be avoided further to return in the second cylinder 12, thus avoiding duplex cylinder compressor 1 that liquid hit phenomenon occurs, improve the service life of duplex cylinder compressor 1.
In further embodiment of the present invention, the volume of the first reservoir 13 is more than the volume of the second reservoir 14.Thus under ensureing the premise of decrement of the second cylinder 12, less by the volume making the second reservoir 14, it is possible to reduce cost.Preferably, the volume of the second reservoir 14 is not more than 1/2nd of the first reservoir 13 volume.
Heating and air conditioner according to the above embodiment of the present invention (is set specified refrigerating capacity as 3.5kw by inventor, it being 7.6% by the delivery space ratio set of the second cylinder and the first cylinder) efficiency under different operating modes compares with existing heating and air conditioner efficiency at the same conditions, obtains following data:
Measurement condition Prior art efficiency Technical solution of the present invention efficiency Lifting ratio
Specified refrigeration 3.93 4.26 8.40%
Middle refrigeration 5.88 6.18 5.10%
Specified heat 3.64 3.91 7.42%
Centre heats 5.55 5.89 6.13%
Low-temperature heating 2.57 2.73 6.23%
APF 4.61 4.92 6.72%
It follows that heating and air conditioner according to embodiments of the present invention is all obviously improved relative to existing cold-warm type compressor, each operating mode efficiency and annual efficiency APF.
The heating and air conditioner of different specified refrigerating capacitys with the embodiment of the present invention of different delivery space ratios is compared by inventor with the heating and air conditioner under existing identical operating mode simultaneously, find that efficiency all has lifting, through overtesting, such as inventor finds that the heating and air conditioner of the embodiment of the present invention (sets specified refrigerating capacity as 2.6kw, it is 9.2% by the delivery space ratio set of the second cylinder and the first cylinder) compared with the heating and air conditioner under existing identical operating mode, efficiency improves 7.3%.
Below with reference to the control method of Fig. 1-Fig. 5 detailed description heating and air conditioner according to embodiments of the present invention, wherein heating and air conditioner is heating and air conditioner according to the above embodiment of the present invention.
The control method of heating and air conditioner according to embodiments of the present invention, adjusting the running frequency of duplex cylinder compressor to satisfying condition according to the compressor operation parameters detected and/or outdoor environment temperature when comprising the steps: refrigeration or heating operation, wherein compressor operation parameters includes at least one in running current, pressure at expulsion, delivery temperature.In other words, according to the running frequency that the testing result detecting object adjusts duplex cylinder compressor when refrigeration or heating operation, wherein detection object includes at least one in the running current of outdoor environment temperature, the delivery temperature of air vent, the pressure at expulsion of air vent, duplex cylinder compressor.
When the running frequency of duplex cylinder compressor adjusts to after satisfying condition, it is possible to again detect compressor operation parameters and/or outdoor environment temperature after running the n second, then adjust the running frequency of compressor according to the testing result again detected, so repeat.Certain repeat condition is not limited to this, for instance can after receiving the operational order of user, and then detection compressor operation parameters and/or outdoor environment temperature again adjust the running frequency of compressor according to the testing result again detected.In other words, when freezing or heating, after the running frequency of compressor satisfies condition, the n second can run or after receiving the operation signal of user, again detection compressor operation parameters and/or outdoor environment temperature, then adjusts running frequency according to testing result, so repeats.
In the concrete example of the present invention, in the process that heating and air conditioner is run, if be detected that user's shutdown command or indoor environment temperature reach design temperature, compressor is out of service.
The control method of heating and air conditioner according to embodiments of the present invention, by adjusting the running frequency of compressor in running according to testing result, such that it is able to let the system operate in suitable parameter area, improves air-conditioner reliability of operation.
In some embodiments of the invention, first multiple different delivery temperature is preset interval, the regulating command of the running frequency that multiple delivery temperature intervals are corresponding is different, and the regulating command that then the delivery temperature interval at the delivery temperature place that detection delivery temperature basis detect is corresponding regulates running frequency.Wherein regulating command can include the instructions such as frequency reducing, raising frequency, maintenance frequency, shutdown, releasing frequency limitation.Adjust the running frequency of compressor thereby through detection delivery temperature, it is possible to the directly running status of response system, it is ensured that system operates in suitable parameter area, improve air-conditioner reliability of operation further.Needing to illustrate, the running frequency that releasing frequency limitation refers to compressor is unrestricted, it is not necessary to adjust the running frequency of compressor.
Such as heating and air conditioner start refrigerating operaton, detects delivery temperature TP, sets following regulating command:115 DEG C≤TP, shut down in running, 110 DEG C≤TP < 115 DEG C, be downconverted to TP < 110 DEG C, 105 DEG C≤TP < 110 DEG C, frequency keeps, TP < 105 DEG C, release frequency limitation.Then perform corresponding regulating command according to the actually detected delivery temperature TP arrived, after adjustment completes, again detect TP, just terminating to judge if meeting adjustment, after running the n second, delivery temperature TP being detected again, repeating to judge.While running the n second, if be detected that user's shutdown command or design temperature reach, terminate to run.
In some embodiments of the invention, preset multiple outdoor temperatures interval, heat stoppage protection electric current and refrigeration stoppage protection electric current, the limit frequency protective current that multiple outdoor temperature intervals are corresponding different.First outdoor environment temperature is detected; then the limit frequency protective current of correspondence is obtained according to the outdoor temperature interval at the outdoor environment temperature place detected; adjust running frequency so that actually detected to running current reach corresponding limit frequency protective current, then directly shut down when the running current wherein detected when cooling is more than refrigeration stoppage protection electric current;The running current detected when heating then directly is shut down more than when heating stoppage protection electric current.
Specifically, during refrigeration, the corresponding relation of the interval and corresponding limit frequency protective current of multiple outdoor temperatures can be as follows: as T4 > 50.5 DEG C, limit frequency protective current is CL5;As 49.5 DEG C >=T4 > 45.5 DEG C, limit frequency protective current is CL4;As 44.5 DEG C >=T4 > 41 DEG C, limit frequency protective current is CL3;As 40 DEG C >=T4 > 33 DEG C, limit frequency protective current is CL2;When 32 >=T4 DEG C, limit frequency protective current is CL1.Wherein the concrete numerical value of CL5, CL4, CL3, CL2, CL1 and refrigeration stoppage protection electric current specifically can limit according to practical situation, does not limit at this.
Such as, when the outdoor environment temperature T4 detected when refrigerating operaton is positioned at outdoor temperature interval 40 DEG C >=T4 > 33 DEG C; then represent that running current does not allow more than limit frequency protective current CL2; if it does, running current will be downconverted to lower than limit frequency protective current CL2.
When heating, the corresponding relation of the interval and corresponding limit frequency protective current of multiple outdoor temperatures can be as follows: as T4 > 15 DEG C, limit frequency protective current is HL5;When 14 DEG C of > T4 >=10 DEG C, limit frequency protective current is HL4;When 9 DEG C of > T4 >=6 DEG C, limit frequency protective current is HL3;When 5 DEG C of > T4 >=-19 DEG C, limit frequency protective current is HL2;As-20 DEG C of > T4, limit frequency protective current is HL1.Wherein HL5, HL4, HL3, HL2, HL1 and heat the concrete numerical value of stoppage protection electric current and specifically can limit according to practical situation, does not limit at this.
Such as, when the outdoor environment temperature T4 detected when heating operation is positioned at 9 DEG C of > T4 >=6 DEG C, outdoor temperature interval; then represent that running current does not allow more than limit frequency protective current HL3; if it does, running current will be downconverted to lower than limit frequency protective current HL3.
In some embodiments of the invention, multiple outdoor temperature can be preset interval, the setting running frequency that multiple outdoor temperature intervals are corresponding different, adjusts the running frequency of compressor according to the setting running frequency that the outdoor temperature interval at the actually detected outdoor environment temperature place arrived is corresponding.
In some embodiments of the invention, first multiple different pressure at expulsion is preset interval, the regulating command of the running frequency that multiple pressure at expulsion intervals are corresponding is different, and the regulating command that then the pressure at expulsion interval at the pressure at expulsion place that detection pressure at expulsion basis detect is corresponding regulates running frequency.Wherein regulating command can include the instructions such as frequency reducing, raising frequency, maintenance frequency, shutdown, releasing frequency limitation.Adjust the running frequency of compressor thereby through detection pressure at expulsion, it is possible to the directly running status of response system, it is ensured that system operates in suitable parameter area, improve air-conditioner reliability of operation further.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.

Claims (10)

1. a heating and air conditioner, it is characterised in that including:
Duplex cylinder compressor, described duplex cylinder compressor includes housing, the first cylinder, the second cylinder and the first reservoir, described housing is provided with air vent, described first cylinder and described second cylinder are respectively provided in described housing, described first reservoir is located at outside described housing, the air entry of described first cylinder connects with described first reservoir, and the span of the delivery space ratio of described second cylinder and described first cylinder is 1%~10%;
Commutation assembly, described commutation assembly includes the first valve port to the 4th valve port, one of them connection in described first valve port and the second valve port and the 3rd valve port, described 4th valve port connects with another in described second valve port and described 3rd valve port, described first valve port is connected with described air vent, and described 4th valve port is connected with described first reservoir;
Outdoor heat exchanger and indoor heat exchanger, the first end of described outdoor heat exchanger is connected with described second valve port, and the first end of described indoor heat exchanger is connected with described 3rd valve port;
Gas-liquid separator, described gas-liquid separator includes gas outlet, first interface and the second interface, described gas outlet is connected with the air entry of described second cylinder, described first interface is connected with the second end of described outdoor heat exchanger, described second interface is connected with the second end of described indoor heat exchanger, it is in series with the first throttle element of fixing aperture between described first interface and described outdoor heat exchanger, between described second interface and described indoor heat exchanger, is in series with the second section fluid element of fixing aperture;
What be connected in parallel controls valve and the coolant radiator for electric control element is dispelled the heat, the described coolant radiator being connected in parallel and described control valve are connected between described outdoor heat exchanger and described first throttle element, the circulation of described control valve cut-off coolant during refrigeration, when heating, coolant flows through described control valve.
2. heating and air conditioner according to claim 1, it is characterised in that be in series with electromagnetic valve between the air entry of described gas outlet and described second cylinder.
3. heating and air conditioner according to claim 1, it is characterised in that the span of the volume of described gas-liquid separator is 100mL-500mL.
4. heating and air conditioner according to claim 1, it is characterised in that described control valve is the check valve of one-way conduction on from described first throttle element to the direction of described outdoor heat exchanger.
5. the heating and air conditioner according to any one of claim 1-4, it is characterized in that, described duplex cylinder compressor also includes the second reservoir being located at outside described housing, and described second reservoir is connected between the air entry of described gas outlet and described second cylinder.
6. heating and air conditioner according to claim 5, it is characterised in that the volume of described first reservoir is more than the volume of described second reservoir.
7. the control method of a heating and air conditioner as claimed in one of claims 1-6, it is characterized in that, adjusting the running frequency of described duplex cylinder compressor to satisfying condition according to the compressor operation parameters detected and/or outdoor environment temperature when comprising the steps: refrigeration or heating operation, wherein said compressor operation parameters includes at least one in running current, pressure at expulsion, delivery temperature.
8. the control method of heating and air conditioner according to claim 7, it is characterized in that, preset multiple different delivery temperature interval, the regulating command of the running frequency that the plurality of delivery temperature interval is corresponding is different, and detection delivery temperature also regulates described running frequency according to the regulating command that the delivery temperature interval at the delivery temperature place detected is corresponding.
9. the control method of heating and air conditioner according to claim 7, it is characterized in that, preset multiple outdoor temperatures interval, heat stoppage protection electric current and refrigeration stoppage protection electric current, the limit frequency protective current that multiple outdoor temperature intervals are corresponding different, first outdoor environment temperature is detected, then the limit frequency protective current of correspondence is obtained according to the outdoor temperature interval at the described outdoor environment temperature place detected, adjust described running frequency so that actually detected to running current reach corresponding described limit frequency protective current, then directly shut down when the described running current wherein detected when cooling is more than described refrigeration stoppage protection electric current;The described running current detected when heating more than described heat stoppage protection electric current time then directly shut down.
10. the control method of heating and air conditioner according to claim 7, it is characterized in that, preset multiple different pressure at expulsion interval, the regulating command of the running frequency that the plurality of pressure at expulsion interval is corresponding is different, and detection pressure at expulsion also regulates described running frequency according to the regulating command that the pressure at expulsion interval at the pressure at expulsion place detected is corresponding.
CN201610286094.2A 2016-04-29 2016-04-29 Cooling-heating air conditioner and control method thereof Pending CN105737424A (en)

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PCT/CN2016/087934 WO2017185515A1 (en) 2016-04-29 2016-06-30 Cooling and heating air conditioner, cooling air conditioner and controlling method for air conditioner

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CN113375320B (en) * 2021-06-11 2021-11-26 广东美的制冷设备有限公司 Air conditioner control method, air conditioner, storage medium and device

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Application publication date: 20160706