CN105783314A - Air conditioner only having refrigeration function and control method thereof - Google Patents

Air conditioner only having refrigeration function and control method thereof Download PDF

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Publication number
CN105783314A
CN105783314A CN201610286724.6A CN201610286724A CN105783314A CN 105783314 A CN105783314 A CN 105783314A CN 201610286724 A CN201610286724 A CN 201610286724A CN 105783314 A CN105783314 A CN 105783314A
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CN
China
Prior art keywords
temperature
outdoor environment
cylinder
environment temperature
aperture
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.)
Granted
Application number
CN201610286724.6A
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Chinese (zh)
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CN105783314B (en
Inventor
杨亚新
李金波
陈明瑜
任超
孙兴
魏洪涛
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
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Priority to CN201610286724.6A priority Critical patent/CN105783314B/en
Priority to PCT/CN2016/087933 priority patent/WO2017185514A1/en
Publication of CN105783314A publication Critical patent/CN105783314A/en
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Publication of CN105783314B publication Critical patent/CN105783314B/en
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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, plants or systems with non-reversible cycle
    • F25B1/10Compression machines, plants 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
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion 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
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006Accumulators
    • 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, plants or systems
    • 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
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion 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
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/15Power, e.g. by voltage or current
    • F25B2700/151Power, e.g. by voltage or current of the compressor motor
    • 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
    • F25B2700/17Speeds
    • F25B2700/171Speeds of the compressor
    • 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
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • F25B2700/1931Discharge pressures
    • 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 an air conditioner only having a refrigeration function and a control method thereof. The air conditioner only having the refrigeration function comprises a double-cylinder compressor, an outdoor heat exchanger, an indoor heat exchanger, an air-liquid separator and a refrigerant heat sink; an air suction port of a first air cylinder is communicated with a first liquid storage device; the exhaust volume ratio of a second air cylinder to the first air cylinder ranges from 1% to 10%; the air-liquid separator comprises an air outlet, a first interface and a second interface; the air outlet is connected to the second air cylinder; a first throttling element with an adjustable opening is connected between the first interface and the outdoor heat exchanger in series; and a second throttling element with a fixed opening is connected between the second interface and the indoor heat exchanger in series; and the refrigerant heat sink is connected between the first throttling element and the first interface in series or is connected between the second throttling element and the second interface in series. The energy efficiency of the air conditioner only having the refrigeration function is effectively improved.

Description

Single cold type air-conditioner and control method thereof
Technical field
The present invention relates to refrigerating field, especially relate to a kind of single cold type 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 single cold type 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 single cold type air-conditioner.
Single cold type 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%;Outdoor heat exchanger and indoor heat exchanger, the first end of described outdoor heat exchanger is connected with described air vent, and the first end of described indoor heat exchanger is connected with described first reservoir;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 adjustable first throttle element of 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;For the coolant radiator that electric control element is dispelled the heat, described coolant radiator tandem is between described first throttle element and described first interface;Or described coolant radiator tandem is between described second section fluid element and described second interface.
Single cold type 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 coolant radiator, it is possible to electric control element is carried out effective temperature-reducing.
In some embodiments of the invention, described first throttle element is electric expansion valve, and described second section fluid element is capillary tube or choke valve.
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 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 single cold type air-conditioner according to embodiments of the present invention, single cold type air-conditioner is single cold type air-conditioner according to the above embodiment of the present invention, adjusts the aperture of described first throttle element to setting aperture according to the testing result detecting object to first when comprising the steps: refrigerating operaton;Wherein said first detection object includes at least one outdoor environment temperature, the running frequency of duplex cylinder compressor, the delivery temperature of air vent, the pressure at expulsion of air vent, the intermediate pressure of coolant discharged from described gas outlet, the medium temperature of coolant discharged from described gas outlet, gas-liquid separation actuator temperature, pressure of the gas and liquid separator.
The control method of single cold type air-conditioner according to embodiments of the present invention, it is possible to the aperture well controlling first throttle element arrives default aperture, reaches optimum energy-saving effect.
In some embodiments of the invention, described first detection object is outdoor environment temperature T4 and delivery temperature, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting delivery temperature according to the described outdoor environment temperature T4 detected and described running frequency F calculating, then adjust the aperture of described first throttle element so that the described delivery temperature detected reaches to set delivery temperature.
In some embodiments of the invention, described first detection object is outdoor environment temperature T4 and pressure at expulsion, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting pressure at expulsion according to the described outdoor environment temperature T4 detected and described running frequency F calculating, then adjust the aperture of described first throttle element so that the described pressure at expulsion detected reaches to set pressure at expulsion.
In some embodiments of the invention, described first detection object is outdoor environment temperature T4, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and the setting aperture obtaining described first throttle element is calculated according to the described outdoor environment temperature T4 detected and described running frequency F, then adjust the aperture of described first throttle element to setting aperture.
In some embodiments of the invention, preset multiple outdoor temperatures interval, the design temperature of the described gas-liquid separator that each described outdoor temperature interval is corresponding different, described first detection object is outdoor environment temperature T4 and the temperature of described gas-liquid separator, first according to actually detected to outdoor environment temperature T4 obtain the design temperature of gas-liquid separator corresponding to the outdoor temperature interval at place, then adjust the aperture of described first throttle element until actually detected to the temperature of described gas-liquid separator meet described design temperature.
In some embodiments of the invention, described first detection object is outdoor environment temperature T4 and intermediate pressure;First running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting intermediate pressure according to the described outdoor environment temperature T4 detected and described running frequency F calculating, then adjust the aperture of described first throttle element so that the described intermediate pressure detected reaches to set intermediate pressure.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of single cold type air-conditioner according to an embodiment of the invention;
Fig. 2 is the schematic diagram of single cold type air-conditioner in accordance with another embodiment of the present invention;
Fig. 3 is the schematic diagram of the single cold type air-conditioner being provided with the second reservoir according to an embodiment of the invention;
Fig. 4 is the schematic diagram of the single cold type air-conditioner being provided with the second reservoir in accordance with another embodiment of the present invention;
Fig. 5 is the schematic diagram of the single cold type air-conditioner being provided with electromagnetic valve and the second reservoir according to embodiments of the present invention;
Fig. 6 is the schematic diagram of duplex cylinder compressor according to embodiments of the present invention;
Fig. 7 is the flow chart of control method during single cold type air-conditioner refrigeration according to embodiments of the present invention.
Accompanying drawing labelling:
Single cold type 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,
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,
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.
Single cold type air-conditioner 100 according to embodiments of the present invention being described in detail below with reference to Fig. 1-Fig. 6, wherein single cold type air-conditioner 100 has refrigeration mode.
As shown in figs 1 to 6, single cold type air-conditioner 100 according to embodiments of the present invention, including: duplex cylinder compressor 1, outdoor heat exchanger 3 and indoor heat exchanger 4, gas-liquid separator 5, first throttle element 6, second section fluid element 7 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%.
First end of outdoor heat exchanger 3 is connected with air vent 15, and the first end and first reservoir 13 of indoor heat exchanger 4 are connected.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 second section fluid element 7 of fixing aperture.Alternatively, first throttle element 6 is electric expansion valve, and second section fluid element 7 is capillary tube or choke valve, it is of course possible to be understood by, and first throttle element 6 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 coolant radiator 9 is connected between first throttle element and first interface f;Or coolant radiator 9 is connected between second section fluid element 7 and the second interface g.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 single cold type air-conditioner 100 freezes, the High Temperature High Pressure coolant discharged from the air vent 15 of duplex cylinder compressor 1 is drained into outdoor heat exchanger 3 and carries out condensation heat radiation, the liquid refrigerants that heat exchanger 3 is discharged outdoor 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, is drained in the first cylinder 11 from the coolant of the first reservoir 13 discharge and is compressed.
During refrigeration, when coolant radiator 9 is connected between first throttle element 6 and first interface f, the coolant after a reducing pressure by regulating flow discharged from first throttle element 6 is flowed in coolant radiator 9 to dispel the heat with electric control element, the coolant flowed out from coolant radiator 9 is drained in gas-liquid separator 5, such that it is able to reduce the temperature of electric control element.When coolant radiator 9 is connected between second section fluid element 7 and the second interface g, enter into dispel the heat with electric control element coolant radiator 9 in from what gas-liquid separator 5 was discharged through a reducing pressure by regulating flow and through the liquid refrigerants of gas-liquid separation, such that it is able to the temperature of reduction electric control element.
Thus analyze known, when single cold type air-conditioner 100 runs, 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, the gas content in the coolant of indoor heat exchanger 4 it is flowed into when thus reducing refrigeration, decrease the gaseous coolant impact on the heat exchange property of the indoor heat exchanger 4 as vaporizer, such that it is able to raising heat exchange efficiency, reduce compressor compresses power consumption.
Single cold type 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 coolant radiator 9, it is possible to electric control element is carried out effective temperature-reducing.
As shown in Figure 5, 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 Figure 5 and Figure 6, 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.
Single cold type 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 single cold type 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%
APF 4.61 4.92 6.72%
It follows that single cold type air-conditioner according to embodiments of the present invention is all obviously improved relative to existing single cold type compressor, each operating mode efficiency and annual efficiency APF.
The single cold type 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 single cold type air-conditioner under existing identical operating mode simultaneously, find that efficiency all has lifting, through overtesting, such as inventor finds that the single cold type 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 single cold type air-conditioner under existing identical operating mode, efficiency improves 7.3%.
Below with reference to the control method of Fig. 1-Fig. 7 detailed description single cold type air-conditioner according to embodiments of the present invention, wherein single cold type air-conditioner is single cold type air-conditioner according to the above embodiment of the present invention.
The control method of single cold type air-conditioner according to embodiments of the present invention, adjusts the aperture of first throttle element to setting aperture according to the testing result detecting object to first when comprising the steps: refrigerating operaton.It is to say, during refrigeration, acquisition process controls the parameter needed for first throttle element, then according to the aperture of the state modulator first throttle element obtained until satisfying condition.
Wherein the first detection object includes outdoor environment temperature, the running frequency of duplex cylinder compressor, the delivery temperature of air vent, the pressure at expulsion of air vent, the intermediate pressure of coolant discharged from gas outlet, the medium temperature of coolant discharged from gas outlet, gas-liquid separation actuator temperature, at least one pressure of the gas and liquid separator.Needing to illustrate, the coolant that intermediate pressure and medium temperature can be connected by detection in the pipeline of gas outlet and the second reservoir draws.
After the aperture of first throttle element satisfies condition, it is possible to after running the n second, detection the first detection object, then adjusts the aperture of first throttle element, so repeats according to testing result again.Certain repeat condition is not limited to this, for instance can after receiving the operational order of user, and detection the first detection object, then adjusts the aperture of first throttle element according to testing result again.In other words, when refrigeration, after the aperture of first throttle element satisfies condition, the n second can run or after receiving the operation signal of user, the relevant parameter of the aperture of first throttle element is detected judgement again, then adjusts the aperture of first throttle element according to result of determination, so repeat.
The control method of single cold type air-conditioner according to embodiments of the present invention, it is possible to the aperture well controlling first throttle element arrives default aperture, reaches optimum energy-saving effect.
Control method according to embodiments of the present invention is described in detail below for six specific embodiments.
Embodiment 1:
In this embodiment, first detection object is outdoor environment temperature T4 and delivery temperature, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting delivery temperature according to the outdoor environment temperature T4 detected and running frequency F calculating, then adjust the aperture of first throttle element so that the delivery temperature detected reaches to set delivery temperature.It is understood that computing formula is located in the electric control element of single cold type air-conditioner in advance, computing formula specifically can limit according to practical situation.
Specifically, when the first detection object is outdoor environment temperature T4 and delivery temperature, detection outdoor environment temperature T4 during refrigeration start, the running frequency F of compressor is determined according to T4, setting delivery temperature TP is determined according to T4 and F, wherein TP=a1*F+b1+c1*T4, a1, b1, c1 span can be corresponding with outdoor environment temperature T4, for instance as 20 DEG C >=T4: a1 takes-10--10;B1 takes-100--100;C1 takes-10 10;When 20 DEG C of < T4≤30 DEG C: a1 takes-8--8;B1 takes-80--80;C1 takes-8 8;When 30 DEG C of < T4≤40 DEG C: a1 takes-9--9;B1 takes-90--90;C1 takes-6 6;When 40 DEG C of < T4≤50 DEG C: a1 takes-8--8;B1 takes-90--90;C1 takes-5 5;As 50 DEG C of < T4: a1 takes-10--10;B1 takes-100--100;C1 takes-5 5.Of course, it should be understood that the value of a1, b1, c1 is not limited to this, for instance can also be unrelated with outdoor environment temperature T4, but set in advance in system.
It should be noted that when a1, b1 one of them or when simultaneously value is 0, it is believed that unrelated with this parameter in formula above, for instance as a1=0, namely to think unrelated with frequency F.
Then the operation aperture of first throttle element is regulated according to TP.First throttle element regulation put in place after stable operation.Again detect outdoor temperature T4 after the n second whether to change or whether user has operation, then regulate the aperture of first throttle element according to associated change.
Such as, start refrigerating operaton, detect that T4 temperature is 35 DEG C, inquire about corresponding compressor operating frequency under this T4 and should be 90HZ, the delivery temperature coefficient a1 in corresponding temperature interval is 0.6, b1 is 20, c1 is 0.2, calculate setting delivery temperature TP=0.6*90+20+0.2*35=81, according to setting delivery temperature Tp=81 DEG C, regulate first throttle element aperture: the TP detected under initial opening has reached 90 degree, then open big first throttle element, reach to set first throttle element aperture delivery temperature Tp=81 DEG C corresponding, that is the delivery temperature detected is made to reach to set delivery temperature.First throttle element reaches stable operation after target aperture.Detect T4 after the n second to be not changed in, continue stable operation.
In this embodiment, the running frequency of compressor is determined by outdoor environment temperature, such as predetermined multiple outdoor environment temperatures are interval, multiple outdoor environment temperature intervals are corresponding multiple compressor operating frequencies respectively, the outdoor environment temperature at the outdoor environment temperature place that inquiry detects is interval, can obtain corresponding compressor operating frequency.Of course, it should be understood that the running frequency of compressor can also be detected by the detecting device that sets on the compressor.
Embodiment 2:
In this embodiment, first detection object is outdoor environment temperature T4 and pressure at expulsion, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting pressure at expulsion according to the outdoor environment temperature T4 detected and running frequency F calculating, then adjust the aperture of first throttle element so that the pressure at expulsion detected reaches to set pressure at expulsion.
Specifically, when the first detection object is outdoor environment temperature T4 and pressure at expulsion, during refrigeration start, detection outdoor environment temperature T4, determines the running frequency F of compressor according to T4, determines setting pressure at expulsion Pp according to T4 and F;Wherein Pp=a3*F+b3+c3*T4;The span of a3, b3, c3 can be corresponding with outdoor environment temperature T4, for instance as 20 DEG C >=T4: a3 takes-5--5;B3 takes-8--8;C3 takes-1 1;When 20 DEG C of < T4≤30 DEG C: a3 takes-5 5;B3 takes-10--10;C3 takes-2 2;When 30 DEG C of < T4≤40 DEG C: a3 takes-5--5;B3 takes-12--12;C3 takes-3 3;When 40 DEG C of < T4≤50 DEG C: a3 takes-6--6;B3 takes-15--15;C3 takes-4 4;As 50 DEG C of < T4: a3 takes-7--7;B3 takes-20--20;C3 takes-5 5.Of course, it should be understood that the value of a3, b3, c3 is not limited to this, for instance can also be unrelated with outdoor environment temperature T4, but set in advance in system.It should be noted that when a3, b3 one of them or when simultaneously value is 0, it is believed that unrelated with this parameter in formula above, for instance as a3=0, namely to think unrelated with frequency F.
Then the operation aperture of first throttle element is regulated according to Pp.First throttle element regulation put in place after stable operation.Again detect outdoor temperature T4 after the n second whether to change or whether user has operation, then regulate first throttle element aperture according to associated change.
Such as start shooting refrigerating operaton, detect that T4 temperature is 35 DEG C, inquire about corresponding compressor operating frequency under this T4 and should be 80HZ, the pressure at expulsion coefficient a3 in corresponding temperature interval is 0.02, b3 is 0.7, c3 is 0.02, calculate pressure at expulsion Pp=0.02*80+0.7+0.02*35=3.0, first throttle element aperture is regulated: under initial opening, detect that pressure at expulsion Pp has reached 2.5MPa according to setting pressure at expulsion Pp=3.0MPa, then turn down first throttle element, reach to set first throttle element aperture corresponding to pressure at expulsion Pp=3.0MPa, that is the pressure at expulsion detected is made to reach to set pressure at expulsion.First throttle element reaches stable operation after target aperture, detects T4 and is not changed in, continue stable operation after the n second.
In this embodiment, the running frequency of compressor is determined by outdoor environment temperature, such as predetermined multiple outdoor environment temperatures are interval, multiple outdoor environment temperature intervals are corresponding multiple compressor operating frequencies respectively, the outdoor environment temperature at the outdoor environment temperature place that inquiry detects is interval, can obtain corresponding compressor operating frequency.Of course, it should be understood that the running frequency of compressor can also be detected by the detecting device that sets on the compressor.
Embodiment 3:
In this embodiment, first detection object is outdoor environment temperature T4, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and the setting aperture obtaining first throttle element is calculated according to the outdoor environment temperature T4 detected and running frequency F, then adjust the aperture of first throttle element to setting aperture.
Specifically, when the first detection object is outdoor environment temperature T4, detection outdoor environment temperature T4 when refrigeration starts;Determine compressor operating frequency F according to T4, determine the setting aperture Lr of first throttle element according to T4 and F;Wherein set aperture Lr=a5*F+b5+c5*T4;Wherein the span of a5, b5, c5 can be corresponding with outdoor environment temperature T4, for instance presets the span of different outdoor environment temperature intervals corresponding different a5, b5, c5, then can limit the value of a5, b5, c5 according to practical situation.
Compare the setting aperture Lr of first throttle element and the difference of first throttle element initial opening, as unanimously, regulated, as inconsistent, be then adjusted to setting aperture Lr.First throttle element regulation put in place after stable operation.Again detect outdoor temperature T4 after the n second whether to change or whether user has operation, then regulate first throttle element aperture according to associated change.
In this embodiment, the running frequency of compressor is determined by outdoor environment temperature, such as predetermined multiple outdoor environment temperatures are interval, multiple outdoor environment temperature intervals are corresponding multiple compressor operating frequencies respectively, the outdoor environment temperature at the outdoor environment temperature place that inquiry detects is interval, can obtain corresponding compressor operating frequency.Of course, it should be understood that the running frequency of compressor can also be detected by the detecting device that sets on the compressor.
Embodiment 4:
In this embodiment, preset multiple outdoor temperatures interval, the temperature of the gas-liquid separator that each outdoor temperature interval is corresponding different, first detection object is the temperature of outdoor environment temperature T4 and gas-liquid separator, first according to actually detected to outdoor environment temperature T4 obtain the design temperature of gas-liquid separator corresponding to the outdoor temperature interval at place, then adjust the aperture of first throttle element until actually detected to the temperature of gas-liquid separator meet design temperature.
Specifically, when first detects the temperature that object is outdoor environment temperature T4 and gas-liquid separator, the temperature Ts of detection outdoor environment temperature T4 and gas-liquid separator when refrigeration start runs, the design temperature of gas-liquid separator corresponding to corresponding outdoor temperature interval is inquired about, for instance the corresponding relation of the interval design temperature with gas-liquid separator of outdoor temperature can be such that as 20 DEG C >=T4: Ts takes 0 30 according to the outdoor environment temperature T4 detected;When 0 DEG C of < T4≤30 DEG C: Ts takes 0 40;When 30 DEG C of < T4≤40 DEG C: Ts takes 0 50;When 40 DEG C of < T4≤50 DEG C: Ts takes 0 60;As 50 DEG C of < T4: Ts takes 0 65.Of course, it should be understood that above-mentioned numerical value is exemplary illustration, and it is not the concrete restriction to the present invention.
Then the aperture of first throttle element is adjusted so that the temperature Ts of the gas-liquid separator detected meets design temperature.
Such as start shooting refrigerating operaton, detect that T4 temperature is 35 DEG C, inquire about corresponding gas-liquid separation actuator temperature Ts under this T4 interval and should be 26 DEG C, detect under initial opening that the temperature Ts of gas-liquid separator has reached 20 DEG C, then open big first throttle element, reach the first throttle element aperture that design temperature Ts=26 DEG C is corresponding, say, that make the temperature Ts of the gas-liquid separator detected reach design temperature.First throttle element reaches stable operation after target aperture.Detect T4 after the n second to be not changed in, continue stable operation.
Embodiment 5:
In this embodiment, the first detection object is outdoor environment temperature T4 and intermediate pressure;First running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting intermediate pressure according to the outdoor environment temperature T4 detected and running frequency F calculating, then adjust the aperture of first throttle element so that the intermediate pressure detected reaches to set intermediate pressure.
Specifically, the relational expression set between intermediate pressure Ps and outdoor environment temperature T4 and running frequency F can be Ps=a7*F+b7+c7*T4, wherein the span of a7, b7, c7 can be corresponding with outdoor environment temperature T4, such as preset the interval of different outdoor environment temperature intervals corresponding different a7, b7, c7, then can limit the value of a7, b7, c7 according to practical situation.
In this embodiment, the running frequency of compressor is determined by outdoor environment temperature, such as predetermined multiple outdoor environment temperatures are interval, multiple outdoor environment temperature intervals are corresponding multiple compressor operating frequencies respectively, the outdoor environment temperature at the outdoor environment temperature place that inquiry detects is interval, can obtain corresponding compressor operating frequency.Of course, it should be understood that the running frequency of compressor can also be detected by the detecting device that sets on the compressor.
Embodiment 6:
In this embodiment, preset multiple outdoor temperatures interval, the pressure of the gas-liquid separator that each outdoor temperature interval is corresponding different, first detection object is the pressure of outdoor environment temperature T4 and gas-liquid separator, first according to actually detected to outdoor environment temperature T4 obtain the setting pressure of gas-liquid separator corresponding to the outdoor temperature interval at place, then adjust the aperture of first throttle element until actually detected to the pressure of gas-liquid separator meet setting pressure.
Specifically, when first detects the pressure that object is outdoor environment temperature T4 and gas-liquid separator, the pressure P s of detection outdoor environment temperature T4 and gas-liquid separator when refrigeration start runs, the setting pressure of gas-liquid separator corresponding to corresponding outdoor temperature interval is inquired about, for instance the corresponding relation of the interval setting pressure with gas-liquid separator of outdoor temperature can be such that as 20 DEG C >=T4: Ps takes 0.1 8 according to the outdoor environment temperature T4 detected;When 20 DEG C of < T4≤30 DEG C: Ps takes 0.1 10;When 30 DEG C of < T4≤40 DEG C: Ps takes 0.1 15;When 40 DEG C of < T4≤50 DEG C: Ps takes 0.1 20;As 50 DEG C of < T4: Ps takes 0.1 25.Of course, it should be understood that above-mentioned numerical value is exemplary illustration, and it is not the concrete restriction to the present invention.
Then the aperture of first throttle element is adjusted so that the pressure P s of the gas-liquid separator detected meets setting pressure.
Such as start shooting refrigerating operaton, detect that T4 temperature is 50 DEG C, inquire about the setting pressure Ps of corresponding gas-liquid separator under this T4 interval and should be 2.0MPa, the pressure P s of the gas-liquid separator detected under initial opening has reached 2.2MPa, then turn down first throttle element, reach first throttle element aperture corresponding for setting pressure Ps=2.2MPa, say, that make the pressure P s of the gas-liquid separator detected meet setting pressure.First throttle element reaches stable operation after target aperture.Detect T4 after the n second to be not changed in, continue stable operation.
It is understandable that, what above-mentioned six specific embodiments were merely given as illustrates, the control method of the embodiment of the present invention is not limited to above-mentioned six kinds, above-described embodiment can also adopt other modes to draw by setup parameters such as calculated setting pressure at expulsion, setting delivery temperature, setting aperture, setting intermediate pressures, it is interval that different outdoor temperatures such as can be set, the corresponding no setup parameter in multiple outdoor temperature intervals, according to actually detected to the outdoor temperature interval at outdoor environment temperature place can obtain corresponding setup parameter.Will also be appreciated that consulting the parameter obtained can also be drawn by the computing formula preset above by outdoor environment temperature.
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 (12)

1. a single cold type 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%;
Outdoor heat exchanger and indoor heat exchanger, the first end of described outdoor heat exchanger is connected with described air vent, and the first end of described indoor heat exchanger is connected with described first reservoir;
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 adjustable first throttle element of 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;
For the coolant radiator that electric control element is dispelled the heat, described coolant radiator tandem is between described first throttle element and described first interface;Or described coolant radiator tandem is between described second section fluid element and described second interface.
2. single cold type air-conditioner according to claim 1, it is characterised in that described first throttle element is electric expansion valve, described second section fluid element is capillary tube or choke valve.
3. single cold type 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.
4. single cold type air-conditioner according to claim 1, it is characterised in that the span of the volume of described gas-liquid separator is 100mL-500mL.
5. the single cold type 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. single cold type 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 single cold type air-conditioner as claimed in one of claims 1-6, it is characterised in that adjust the aperture of described first throttle element to setting aperture according to the testing result detecting object to first when comprising the steps: refrigerating operaton;Wherein said first detection object includes at least one outdoor environment temperature, the running frequency of duplex cylinder compressor, the delivery temperature of air vent, the pressure at expulsion of air vent, the intermediate pressure of coolant discharged from described gas outlet, the medium temperature of coolant discharged from described gas outlet, gas-liquid separation actuator temperature, pressure of the gas and liquid separator.
8. the control method of single cold type air-conditioner according to claim 7, it is characterized in that, described first detection object is outdoor environment temperature T4 and delivery temperature, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting delivery temperature according to the described outdoor environment temperature T4 detected and described running frequency F calculating, then adjust the aperture of described first throttle element so that the described delivery temperature detected reaches to set delivery temperature.
9. the control method of single cold type air-conditioner according to claim 7, it is characterized in that, described first detection object is outdoor environment temperature T4 and pressure at expulsion, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting pressure at expulsion according to the described outdoor environment temperature T4 detected and described running frequency F calculating, then adjust the aperture of described first throttle element so that the described pressure at expulsion detected reaches to set pressure at expulsion.
10. the control method of single cold type air-conditioner according to claim 7, it is characterized in that, described first detection object is outdoor environment temperature T4, first running frequency F is obtained according to the outdoor environment temperature T4 detected, and the setting aperture obtaining described first throttle element is calculated according to the described outdoor environment temperature T4 detected and described running frequency F, then adjust the aperture of described first throttle element to setting aperture.
11. the control method of single cold type air-conditioner according to claim 7, it is characterized in that, preset multiple outdoor temperatures interval, the design temperature of the described gas-liquid separator that each described outdoor temperature interval is corresponding different, described first detection object is outdoor environment temperature T4 and the temperature of described gas-liquid separator, first according to actually detected to outdoor environment temperature T4 obtain the design temperature of gas-liquid separator corresponding to the outdoor temperature interval at place, then adjust the aperture of described first throttle element until actually detected to the temperature of described gas-liquid separator meet described design temperature.
12. the control method of single cold type air-conditioner according to claim 7, it is characterised in that described first detection object is outdoor environment temperature T4 and intermediate pressure;First running frequency F is obtained according to the outdoor environment temperature T4 detected, and obtain setting intermediate pressure according to the described outdoor environment temperature T4 detected and described running frequency F calculating, then adjust the aperture of described first throttle element so that the described intermediate pressure detected reaches to set intermediate pressure.
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