CN110285598A - Air injection enthalpy-increasing air-conditioning system, method and air injection enthalpy-increasing air-conditioning and readable storage medium storing program for executing - Google Patents

Air injection enthalpy-increasing air-conditioning system, method and air injection enthalpy-increasing air-conditioning and readable storage medium storing program for executing Download PDF

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Publication number
CN110285598A
CN110285598A CN201910578088.8A CN201910578088A CN110285598A CN 110285598 A CN110285598 A CN 110285598A CN 201910578088 A CN201910578088 A CN 201910578088A CN 110285598 A CN110285598 A CN 110285598A
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China
Prior art keywords
heat exchanger
air
aperture
injection enthalpy
conditioning system
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CN201910578088.8A
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CN110285598B (en
Inventor
马剑
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present invention provides a kind of air injection enthalpy-increasing air-conditioning system, the control method of air injection enthalpy-increasing air-conditioning system, air injection enthalpy-increasing air-conditioning and computer readable storage mediums, wherein air injection enthalpy-increasing air-conditioning system includes: economizer, first throttle element is arranged on the pipeline that the first heat exchanger channels entrance is connected with indoor heat exchanger；Control device is connected with first throttle element, and the second measurement temperature of the first measurement temperature and the second heat exchanger channels entrance for being exported according to the first heat exchanger channels adjusts the aperture of first throttle element.In air injection enthalpy-increasing air-conditioning system, the stability of system control can be also assured while simplifying control logic without the concern for the influence of the factors such as environment temperature as adjustment foundation by the temperature computation degree of superheat of the entry position of outlet and the second heat exchanger channels to the first heat exchanger channels.

Description

Air injection enthalpy-increasing air-conditioning system, method and air injection enthalpy-increasing air-conditioning and readable storage medium storing program for executing
Technical field
The present invention relates to central air-conditioning increasing enthalpy technical fields, in particular to a kind of air injection enthalpy-increasing air-conditioning system, one kind The control method of air injection enthalpy-increasing air-conditioning system, a kind of air injection enthalpy-increasing air-conditioning and computer readable storage medium.
Background technique
In traditional central air conditioner system with the continuous reduction of outdoor temperature, indoor heating thermic load can be continuously increased, The various problems such as heat supply is insufficient, pressure ratio of compressor increases, coefficient of performance sharply declines can be generated.At present in major part Entreating the compressor in air-conditioning is constant speed technology and converter technique, but heating capacity and efficiency be much under ultralow temperature (- 20 DEG C) operating condition It is not able to satisfy user's needs, special national government recent years is in the requirement of each bid technical bid evaluation to central air-conditioning in low temperature The heating capacity of (especially -25 DEG C and -20 DEG C) and efficiency propose the threshold more increased under environment.It declines to solve low-temperature heating ability The problem of subtracting bottleneck and raising central air-conditioning heat efficiency, mainly there is frequency conversion air injection enthalpy-increasing technology and twin-stage before energy-saving square appearance Compress technique etc..Consider based on various factors, air injection enthalpy-increasing technology for improve worst cold case under heating capacity and efficiency, and Guarantee that air-conditioner set long time stability operation under ultra-low temperature surroundings has apparent advantage.
There are two the control method of currently used air injection enthalpy-increasing heat pump injection valve is general:
(1) aperture of injection road electric expansion valve is adjusted using the degree of superheat at economizer bypass import and export；
(2) aperture of injection road electric expansion valve is adjusted using the degree of superheat at economizer main road import and export.
Both methods is needed according to different environment temperatures, and different degree of superheat sections is arranged in different water temperatures, exists Control logic is complex, and serious forgiveness is not high, and larger problem is fluctuated under Boundary Condition Control.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, the first aspect of the present invention proposes a kind of air injection enthalpy-increasing air-conditioning system.
The second aspect of the present invention proposes a kind of control method of air injection enthalpy-increasing air-conditioning system.
The third aspect of the present invention proposes a kind of air injection enthalpy-increasing air-conditioning.
The fourth aspect of the present invention proposes a kind of computer readable storage medium.
In view of this, the first aspect of the present invention provides a kind of air injection enthalpy-increasing air-conditioning system, including to form refrigerant Compressor, indoor heat exchanger, the outdoor heat exchanger in circuit, further includes: there is economizer the first heat exchanger channels entrance, first to change Passage of heat outlet, the second heat exchanger channels entrance, the first heat exchanger channels entrance and the second heat exchanger channels entrance and indoor heat exchanger Liquid pipe is connected, and the outlet of the first heat exchanger channels is connected with the spray depth mouth of compressor；First throttle element, setting is in the first heat exchange On the pipeline that feeder connection is connected with indoor heat exchanger；Control device is connected with first throttle element, for according to first First measurement temperature of heat exchanger channels outlet and the second measurement temperature of the second heat exchanger channels entrance, adjustment first throttle element Aperture.
In a kind of air injection enthalpy-increasing air-conditioning system provided by the invention, including compressor, indoor heat exchanger, outdoor heat exchange Device, economizer, first throttle element and control device, economizer can be selected plate and change economizer, and heat exchanger and outdoor are changed indoors Economizer is provided between hot device, economizer there are two heat exchanger channels, the entrance and exit of the first heat exchanger channels respectively with room The liquid pipe of interior heat exchanger is connected with compressor jet port, when the first heat exchanger channels connection when, make refrigerant reenter compressor after Continuous compression, increases heating capacity of the compressor under severe cold, the entrance and exit of the second heat exchanger channels respectively with indoor heat exchange The liquid pipe of device is connected with outdoor heat exchanger, and when the connection of the second heat exchanger channels, a part of refrigerant is directly over the second heat exchanger channels It enters in outdoor heat exchanger, is again introduced into compressor.In the process, economizer, which plays, is divided into the refrigerant after heat release Two parts, a part of refrigerant decompression enter in outdoor heat exchanger later, and another part refrigerant is sent directly into pressure after being preheated In contracting machine, refrigerant gas is supplemented to increase the capacity of compressor by jet port, improve outdoor temperature it is very low when, compression The problem of compressor horsepower caused by the return-air amount of the normal gas returning port of machine is reduced reduces, the setting of first throttle element is in the first heat exchange On the pipeline that feeder connection is connected with indoor heat exchanger, for controlling whether the refrigerant after indoor heat exchanger heat release enters first In heat exchanger channels, expansion valve is can be selected in first throttle element, and control device is connected with first throttle element, can be according to first The temperature value of heat exchanger channels outlet and the second heat exchanger channels entrance carries out control first throttle member to the aperture of first throttle element The aperture of part, since first throttle element is in the first heat exchanger channels, control first throttle element aperture to control by Economizer is directly entered the flow of the gas coolant of compressor.Using to the first heat exchanger channels outlet temperature and the second heat exchanger channels Inlet temperature enters the adjusting foundation of compressor gas coolant quantity as regulation economizer, compared with the prior art in utilize first Heat exchanger channels outlet temperature and inlet temperature or the second heat exchanger channels outlet temperature and inlet temperature have more as foundation is adjusted Good stability, due to needing using the entrance temperature of a single heat exchanger channels as foundation according to different environment temperatures Etc. the different degree of superheat section of other parameter settings, control logic setting it is more complicated, serious forgiveness is not high, and due to environment temperature Degree can have multiple boundary conditions, and when environment temperature is in boundary condition, the flowed fluctuation of control is big, and by changing first The temperature computation degree of superheat of the entry position of the outlet and the second heat exchanger channels of the passage of heat can not need to examine as adjustment foundation The influence for considering the factors such as environment temperature also assures the stability of system control while simplifying control logic.
In addition, the air injection enthalpy-increasing air-conditioning system in above-mentioned technical proposal provided by the invention also has following supplementary technology special Sign:
In the above-mentioned technical solutions, further, economizer further includes the outlet of the second heat exchanger channels, and the second heat exchanger channels go out Mouth is connected with the first port of outdoor heat exchanger, air injection enthalpy-increasing air-conditioning system further include: the second restricting element is arranged second On the pipeline that heat exchanger channels are connected with outdoor heat exchanger；Control device is connected with second throttling device, for obtaining second The adjusting parameter of restricting element, based on first throttle element and the second restricting element with the feelings of identical adjusting parameter adjustment aperture Under condition, control first throttle element adjusts aperture after the second restricting element adjusts the first preset duration after aperture again.
In the technical scheme, the second restricting element selects electric expansion valve, and the second restricting element makes the liquid of medium temperature high pressure Body refrigerant becomes the moist steam of low-temp low-pressure by its throttling, enters outdoor heat exchanger and absorbs heat, control device is for controlling When making the aperture of the second restricting element, while the aperture of first throttle element and the second restricting element being adjusted, refrigerant exists Flowing in economizer can generate fluctuation, to will affect the testing result of each position detection device, to make to first segment Stream valve and second throttle are constantly in the state of adjustment aperture.Therefore, it is needed in first throttle element and the second restricting element When being controlled simultaneously to adjust aperture, control device needs to wait for the first preset duration after controlling the movement of the second restricting element Afterwards, then first throttle element movement is controlled, avoids first throttle element and the second restricting element is in fluctuation status for a long time.
In any of the above-described technical solution, further, air injection enthalpy-increasing air-conditioning system further include: solenoid valve, setting is the On the pipeline that the outlet of one heat exchanging pipe is connected with the air entry of compressor；Control device is connected with solenoid valve, for obtaining And the aperture parameter of control solenoid valve.
In the technical scheme, solenoid valve is the normally closed solenoid valve being arranged between economizer and compressor, control device For controlling the aperture of solenoid valve, when needing to carry out supplement gaseous coolant to compressor using economizer, control device control Solenoid valve is opened.
In any of the above-described technical solution, further, air injection enthalpy-increasing air-conditioning system further include: the first temperature measuring equipment, if It sets in the first heat exchanger channels exit, for obtaining the first measurement temperature；Second temperature measuring equipment, setting enter in the second heat exchanger channels At mouthful, for obtaining the second measurement temperature；First temperature measuring equipment is connected with the second temperature measuring equipment with control device.
In the technical scheme, by the way that the first temperature measuring equipment of the outlet of the first heat exchanger channels is arranged in and is arranged second Second temperature measuring equipment of heat exchanger channels entrance to obtain the first measurement temperature and the second measurement temperature, survey by control device and first Warm device and the connection of the second temperature measuring equipment, available first measurement temperature and the second measurement temperature, control device is according to first Measurement temperature and the second measurement temperature calculate the degree of superheat, to be controlled according to aperture of the degree of superheat to first throttle element System.
In any of the above-described technical solution, further, air injection enthalpy-increasing air-conditioning system further include: low-pressure tank, first end Mouth is connected with the gas returning port of compressor；Reversal valve, the first port of reversal valve are connected with the second port of outdoor unit heat exchanger It connects, the second port of reversal valve is connected with the exhaust outlet of compressor, the third port of reversal valve and the gas of indoor set heat exchanger Pipe is connected, and the 4th port of reversal valve is connected with the second port of low-pressure tank；Control device is connected with reversal valve, is used for Control reversal valve commutation.
In the technical scheme, low-pressure tank is connected with the gas returning port of compressor, can separate and save the liquid in muffler Body prevents compressor from liquid hammer occurs, and plays the role of adjusting flow, and control device is connected with reversal valve, makes control device can be with Control reversal valve commutate, and the first port of reversal valve, second port, third port and the 4th port respectively with outdoor unit The second port of heat exchanger, the exhaust outlet of compressor, indoor set heat exchanger tracheae be connected with the second port of low-pressure tank, can be with It is adjusted by the commutation to reversal valve to control the operational mode of air-conditioning system.
The second aspect of the present invention provides a kind of control method of air injection enthalpy-increasing air-conditioning system, air injection enthalpy-increasing air-conditioning system Air injection enthalpy-increasing air-conditioning system in any of the above-described technical solution, control method include: that the first heat exchanger channels of acquisition economizer go out Second measurement temperature of the second heat exchanger channels entrance of the first measurement temperature and economizer of mouth；According to the first measurement temperature and the Two measurement temperature, adjust the aperture of first throttle element.
In a kind of control method of air injection enthalpy-increasing air-conditioning system provided by the invention, the first heat exchange is got in control device Channel outlet temperature and the second heat exchanger channels inlet temperature are measured as the first measurement temperature and the second measurement temperature by first Temperature and the second measurement temperature carry out that the degree of superheat is calculated, and are controlled according to aperture of the degree of superheat to first throttle element, Enter compressor gas using the first measurement temperature come in the acquisition of various heat exchange channel and the second measurement temperature as regulation economizer The adjusting foundation of body coolant quantity, compared with the prior art in exchanged heat using the temperature of the outlet of the first heat exchanger channels and entrance or the Channel outlet and entrance have better stability, due to the entrance of a single heat exchanger channels as foundation is adjusted As according to the degree of superheat section different according to other parameter settings such as different environment temperatures is needed, control logic is set temperature More complicated, serious forgiveness is not high, and since environment temperature can have multiple boundary conditions, is in boundary condition in environment temperature When, the flowed fluctuation of control is big, and the temperature of the entry position by outlet and the second heat exchanger channels to the first heat exchanger channels Calculating the degree of superheat can be without the concern for the influence of the factors such as environment temperature, while simplifying control logic as adjustment foundation Also assure the stability of system control.
In addition, the control method of the air injection enthalpy-increasing air-conditioning system in above-mentioned technical proposal provided by the invention also have it is as follows Additional technical feature:
In the above-mentioned technical solutions, further, according to the first measurement temperature and the second measurement temperature, first throttle is adjusted It the step of aperture of element, specifically includes: the temperature gap of the first measurement temperature and the second measurement temperature is determined, according to temperature difference Value, control first throttle element adjust relation data according to aperture every the second preset duration and adjust an aperture.
In the technical scheme, temperature gap, temperature difference are obtained according to the first measurement temperature and the second measurement temperature computation Value is the degree of superheat, is adjusted, plays according to temperature gap again again according to adjustment relationship every the second preset duration Real-time change is adjusted in real time.
In any of the above-described technical solution, further, aperture adjusts relation data and is temperature gap, adjustment step number, adjusts Perfect square to corresponding relation data.
In the technical scheme, first throttle element selects electric expansion valve, and there are expansion valve step number, roots for electric expansion valve Be adjusted according to the temperature difference detected and adjustment expansion step number and the corresponding relationship of expansion direction, wherein temperature gap more it is big then Adjust that step number is bigger, and temperature gap is smaller, it is smaller to adjust step number, and adjustment direction is positive when temperature difference is positive number, and temperature difference is Adjustment direction is negative when negative, realize according to different temperatures difference correspond to different adjustment step number and adjustment direction with pair first segment The aperture of fluid element is adjusted, and further increases the accuracy of aperture regulation, to improve the stability of system.
In any of the above-described technical solution, further, control method further include: obtain the adjustment ginseng of the second restricting element Number in the case where needing synchronous adjustment aperture based on first throttle element and the second restricting element, controls first throttle element the Aperture is adjusted again after the first preset duration after two restricting elements adjustment aperture.
In the technical scheme, when control device receives the adjusting parameter being adjusted to the second restricting element, really Recognize whether and meanwhile have received control parameter to first throttle element, needing while adjusting first throttle element and the second section When the aperture of fluid element, the second restricting element of control is first carried out, is adjusted first throttle member again after the first preset duration The aperture of part, while when the aperture of first throttle element and the second restricting element is adjusted, stream of the refrigerant in economizer It is dynamic to generate fluctuation, to will affect the testing result of each position detection device, so that first throttle valve and second be made to throttle Valve is constantly in adjustment aperture state.Therefore, it needs while is controlled to adjust in first throttle element and the second restricting element When whole aperture, control device is after needing to wait for the first preset duration after controlling the movement of the second restricting element, then controls first throttle Element movement, avoids first throttle element and the second restricting element is in fluctuation status for a long time.
In any of the above-described technical solution, further, control method further include: receive power-on instruction, control first segment Fluid element is adjusted to default initial opening.
In the technical scheme, when air-conditioner set is switched on, first to first throttle element initialization, make first throttle element Aperture before booting is carried out clear, initial opening is then adjusted to according to preset aperture, guarantees that each unit turns back on When first segment element be in the aperture set, air-conditioner set will not be caused to damage since aperture is unreasonable.
In any of the above-described technical solution, further, adjust in control first throttle element to default aperture, also Include: that confirmation solenoid valve is in the open state and after continuing third preset duration, executes and surveyed according to the first measurement temperature and second Amount temperature adjusts the step of aperture of first throttle element.
In the technical scheme, after air-conditioner set booting, temperature measured by the first temperature measuring equipment and the second temperature measuring equipment Degree will receive the influence of environment temperature, if directly according to the first measurement temperature detected when being just switched on and the second measurement temperature Deviation can be generated by controlling first throttle element, therefore, after control first throttle element adjusted value presets aperture, by electromagnetism Valve is opened, and economizer is made to carry out coolant adding to compressor, so that compressor is improved power and is held after lasting third scheduled duration The step of row is adjusted first throttle valve according to temperature difference makes air-conditioner set system first according to the first throttle valve preset Aperture operation a period of time guarantees that collected first measurement temperature and the second measurement temperature keep stable state, then is connect Get off the step of being adjusted to first throttle element.
In any of the above-described technical solution, further, according to the first measurement temperature and the second measurement temperature, adjustment the After the step of aperture of one restricting element, further includes: confirmation solenoid valve is again at closed state, adjusts first throttle element Aperture to default initial opening.
In the technical scheme, solenoid valve is normally off, judge compressor do not need economizer carry out coolant adding When, control solenoid valve returns to closed state and is no longer flow into compressor after solenoid valve is closed from the refrigerant flowed out in economizer, Control first throttle element is restored to initial aperture at this time, guarantees the stability of system.
The third aspect of the present invention provides a kind of air injection enthalpy-increasing air-conditioning, including, the memory of computer program is stored, with And processor, processor are used to execute the control method in the air injection enthalpy-increasing air conditioning control method of the application second aspect offer.
In the technical scheme, economizer can be selected plate and change economizer, set between indoor heat exchanger and outdoor heat exchanger Set economizer, economizer there are two heat exchanger channels, the entrance and exit of the first heat exchanger channels respectively with indoor heat exchanger Liquid pipe is connected with compressor jet port, when the connection of the first heat exchanger channels, so that refrigerant is reentered compressor and is continued to compress, increases Heating capacity of the compressor under severe cold, the entrance and exit of the second heat exchanger channels respectively with the liquid pipe of indoor heat exchanger and room External heat exchanger is connected, and when the connection of the second heat exchanger channels, a part of refrigerant, which is directly over the second heat exchanger channels and enters outdoor, to be changed In hot device, it is again introduced into compressor.In the process, economizer, which is played, is divided into two parts for the refrigerant after heat release, and one Refrigerant decompression is divided to enter in outdoor heat exchanger later, another part refrigerant is sent directly into compressor after being preheated, and is passed through Jet port supplement refrigerant gas to increase the capacity of compressor, improve outdoor temperature it is very low when, the normal return-air of compressor Mouthful return-air amount reduce caused by compressor horsepower reduce the problem of, first throttle element setting the first heat exchanger channels entrance with On the pipeline that indoor heat exchanger is connected, for controlling whether the refrigerant after indoor heat exchanger heat release enters the first heat exchanger channels In, expansion valve can be selected in first throttle element, and control device is connected with first throttle element, can be according to the first heat exchanger channels The temperature value of outlet and the second heat exchanger channels entrance carries out the aperture of control first throttle element to the aperture of first throttle element, Since first throttle element is in the first heat exchanger channels, it is direct by economizer to control to control the aperture of first throttle element Into the flow of the gas coolant of compressor.Using to the first heat exchanger channels outlet temperature and the second heat exchanger channels inlet temperature work Enter the adjusting foundation of compressor gas coolant quantity for regulation economizer, it is middle compared with the prior art to be gone out using the first heat exchanger channels Mouth temperature and inlet temperature or the second heat exchanger channels outlet temperature and inlet temperature have preferably stable as foundation is adjusted Property, since using the entrance temperature of a single heat exchanger channels as according to needs, according to different environment temperature etc., other are joined Different degree of superheat sections is arranged in number, and control logic setting is more complicated, and serious forgiveness is not high, and since environment temperature can exist Multiple boundary conditions, when environment temperature is in boundary condition, the flowed fluctuation of control is big, and by the first heat exchanger channels The temperature computation degree of superheat of outlet and the entry position of the second heat exchanger channels can be without the concern for environment temperature as adjustment foundation The influence of the factors such as degree also assures the stability of system control while simplifying control logic.
In addition, the air injection enthalpy-increasing air-conditioning in above-mentioned technical proposal provided by the invention also has following additional technical feature:
In any of the above-described technical solution, further, processor is executed according to the first measurement temperature and the second measurement temperature Degree adjusts the process of the aperture of first throttle element, specifically includes: determining the temperature of the first measurement temperature and the second measurement temperature Difference controls first throttle element every the second preset duration and adjusts relation data adjustment one according to aperture according to temperature gap Secondary aperture.
In the technical scheme, temperature gap, temperature difference are obtained according to the first measurement temperature and the second measurement temperature computation Value is the degree of superheat, is adjusted, plays according to temperature gap again again according to adjustment relationship every the second preset duration Real-time change is adjusted in real time.
In any of the above-described technical solution, further, aperture adjusts relation data and is temperature gap, adjustment step number, adjusts Perfect square to corresponding relation data, wherein temperature gap and adjustment step number between be positive correlation.
In the technical scheme, first throttle element selects electric expansion valve, and there are expansion valve step number, roots for electric expansion valve Be adjusted according to the temperature difference detected and adjustment expansion step number and the corresponding relationship of expansion direction, wherein temperature gap more it is big then Adjust that step number is bigger, and temperature gap is smaller, it is smaller to adjust step number, and adjustment direction is positive when temperature difference is positive number, and temperature difference is Adjustment direction is negative when negative, realize according to different temperatures difference correspond to different adjustment step number and adjustment direction with pair first segment The aperture of fluid element is adjusted, and further increases the accuracy of aperture regulation, to improve the stability of system.
In any of the above-described technical solution, further, air injection enthalpy-increasing air-conditioning further includes that setting goes out in the first heat exchanging pipe The solenoid valve on pipeline that mouth is connected with the air entry of compressor, processor are also used to: obtaining the adjustment of the second restricting element Parameter, in the case where adjusting aperture based on first throttle element and the second restricting element with identical adjusting parameter, control first Restricting element adjusts aperture after the second restricting element adjusts the first preset duration after aperture again.
In the technical scheme, when control device receives the adjusting parameter being adjusted to the second restricting element, really Recognize whether and meanwhile have received control parameter to first throttle element, needing while adjusting first throttle element and the second section When the aperture of fluid element, the second restricting element of control is first carried out, is adjusted first throttle member again after the first preset duration The aperture of part, while when the aperture of first throttle element and the second restricting element is adjusted, stream of the refrigerant in economizer It is dynamic to generate fluctuation, to will affect the testing result of each position detection device, so that first throttle valve and second be made to throttle Valve is constantly in adjustment aperture state.Therefore, it needs while is controlled to adjust in first throttle element and the second restricting element When whole aperture, control device is after needing to wait for the first preset duration after controlling the movement of the second restricting element, then controls first throttle Element movement, avoids first throttle element and the second restricting element is in fluctuation status for a long time.
In any of the above-described technical solution, further, processor is also used to: being received power-on instruction, is controlled first throttle Element is adjusted to default initial opening.
In the technical scheme, when air-conditioner set is switched on, first to first throttle element initialization, make first throttle element Aperture before booting is carried out clear, initial opening is then adjusted to according to preset aperture, guarantees that each unit turns back on When first segment element be in the aperture set, air-conditioner set will not be caused to damage since aperture is unreasonable.
In any of the above-described technical solution, further, processor is adjusted in control first throttle element to default aperture Later, be also used to: confirmation solenoid valve is in the open state and after continuing third preset duration, execute according to the first measurement temperature and The step of aperture of second measurement temperature adjustment first throttle element.
In the technical scheme, after air-conditioner set booting, temperature measured by the first temperature measuring equipment and the second temperature measuring equipment Degree will receive the influence of environment temperature, if directly according to the first measurement temperature detected when being just switched on and the second measurement temperature Deviation can be generated by controlling first throttle element, therefore, after control first throttle element adjusted value presets aperture, by electromagnetism Valve is opened, and economizer is made to carry out coolant adding to compressor, so that compressor is improved power and is held after lasting third scheduled duration The step of row is adjusted first throttle valve according to temperature difference makes air-conditioner set system first according to the first throttle valve preset Aperture operation a period of time guarantees that collected first measurement temperature and the second measurement temperature keep stable state, then is connect Get off the step of being adjusted to first throttle element.
In any of the above-described technical solution, further, according to the first measurement temperature and the second measurement temperature, adjustment the After the aperture of one restricting element, processor is also used to: confirmation solenoid valve is again at closed state, adjusts first throttle element Aperture to default initial opening.
In the technical scheme, solenoid valve is normally off, judge compressor do not need economizer carry out coolant adding When, control solenoid valve returns to closed state and is no longer flow into compressor after solenoid valve is closed from the refrigerant flowed out in economizer, Control first throttle element is restored to initial aperture at this time, guarantees the stability of system.
Fourth aspect present invention provides a kind of computer readable storage medium, is stored thereon with computer program, calculates The control method such as the air injection enthalpy-increasing air-conditioning system in any of the above-described technical solution is realized when machine program is executed by processor, because This, which includes the complete of the control method of the air injection enthalpy-increasing air-conditioning system in any of the above-described technical solution Portion's beneficial effect.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:
Fig. 1 show one according to the present invention be strength air injection enthalpy-increasing air-conditioning system structure chart；
Fig. 2 shows the signals of the process of the control method of air injection enthalpy-increasing air-conditioning system according to an embodiment of the invention Figure；
The process that Fig. 3 shows the control method of air injection enthalpy-increasing air-conditioning system according to another embodiment of the invention is shown It is intended to；
Fig. 4 shows the adjustment relationship signal according to one embodiment of present invention between temperature difference and adjustment step number Figure；
The process that Fig. 5 shows the control method of air injection enthalpy-increasing air-conditioning system according to still another embodiment of the invention is shown It is intended to；
The process that Fig. 6 shows the control method of air injection enthalpy-increasing air-conditioning system according to still another embodiment of the invention is shown It is intended to；
The process that Fig. 7 shows the control method of air injection enthalpy-increasing air-conditioning system according to still another embodiment of the invention is shown It is intended to；
Fig. 8 shows the schematic block diagram of air injection enthalpy-increasing air-conditioning according to an embodiment of the invention.
Wherein, the appended drawing reference in Fig. 1 and Fig. 8 and the corresponding relationship between component names are as follows:
10 compressors, 20 indoor heat exchangers, 30 outdoor heat exchangers, 40 economizers, 41 first heat exchanger channels entrances, 42 first Heat exchanger channels outlet, 43 second heat exchanger channels entrances, the outlet of 44 second heat exchanger channels, 50 first throttle elements, 60 second throttlings Element, 70 solenoid valves, 80 low-pressure tanks, 90 reversal valves, 100 first temperature measuring equipments, 110 second temperature measuring equipments, 200 air injection enthalpy-increasings are empty Adjusting system, 210 memories, 220 processors.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.
A kind of air injection enthalpy-increasing air-conditioning system provided according to some embodiments of the present invention is described referring to Fig. 1.
Such as Fig. 1, the embodiment of first aspect present invention provides a kind of air injection enthalpy-increasing air-conditioning system, including cold to be formed Compressor 10, indoor heat exchanger 20, the outdoor heat exchanger 30 in matchmaker circuit, further includes: there are economizer 40 first heat exchanger channels to enter The 41, first heat exchanger channels of mouth export the 42, second heat exchanger channels entrance 43, and the first heat exchanger channels entrance 41 and the second heat exchanger channels enter Mouth 43 is connected with the liquid pipe of indoor heat exchanger 20, and the first heat exchanger channels outlet 42 is connected with the spray depth mouth of compressor 10；The One restricting element 50 is arranged on the pipeline that the first heat exchanger channels entrance 41 is connected with indoor heat exchanger 20；Control device, with First throttle element 50 is connected, for being entered according to the first measurement temperature of the first heat exchanger channels outlet 42 and the second heat exchanger channels Second measurement temperature of mouth 43, adjusts the aperture of first throttle element 50.
In a kind of air injection enthalpy-increasing air-conditioning system that the embodiment provides, including compressor 10, indoor heat exchanger 20, room External heat exchanger 30, economizer 40, first throttle element 50 and control device, economizer 40 can be selected plate and change economizer 40, in room Economizer 40 is provided between interior heat exchanger 20 and outdoor heat exchanger 30, there are two heat exchanger channels, the first heat exchange for economizer 40 The entrance and exit in channel is connect with the liquid pipe of indoor heat exchanger 20 and 10 jet port of compressor respectively, when the first heat exchanger channels connect When logical, so that refrigerant is reentered compressor 10 and continue to compress, increases heating capacity of the compressor 10 under severe cold, the second heat exchange The entrance and exit in channel is connected with the liquid pipe of indoor heat exchanger 20 and outdoor heat exchanger 30 respectively, when the second heat exchanger channels are connected to When, a part of refrigerant is directly over the second heat exchanger channels and enters in outdoor heat exchanger 30, is again introduced into compressor 10.Herein In the process, economizer 40, which is played, is divided into two parts for the refrigerant after heat release, and a part of refrigerant decompression enters outdoor heat exchange later In device 30, another part refrigerant is sent directly into compressor 10 after being preheated, by jet port supplement refrigerant gas to Increase compressor 10 capacity, improve outdoor temperature it is very low when, the normal gas returning port of compressor 10 return-air amount reduction cause The under powered problem of compressor 10, the setting of first throttle element 50 is in the first heat exchanger channels entrance 41 and indoor heat exchanger 20 On the pipeline being connected, for controlling whether the refrigerant after 20 heat release of indoor heat exchanger enters in the first heat exchanger channels, first segment Expansion valve can be selected in fluid element 50, and control device is connected with first throttle element 50, can be exported according to the first heat exchanger channels 42 and second the temperature value of heat exchanger channels entrance 43 control first throttle element 50 is carried out to the aperture of first throttle element 50 Aperture, since first throttle element 50 is in the first heat exchanger channels, control first throttle element 50 aperture to control by Economizer 40 is directly entered the flow of the gas coolant of compressor 10.It is changed using to the first heat exchanger channels outlet 42 temperature and second 43 temperature of passage of heat entrance enters the adjusting foundation of 10 gas coolant amount of compressor as regulation economizer 40, compared to existing skill 42 temperature and inlet temperature are exported using the first heat exchanger channels in art or the second heat exchanger channels export 44 temperature and inlet temperature is made To adjust foundation, there is better stability, due to using the entrance temperature of a single heat exchanger channels as according to needs According to the different degree of superheat section of the other parameter settings such as different environment temperatures, control logic sets more complicated, serious forgiveness It is not high, and since environment temperature can have multiple boundary conditions, when environment temperature is in boundary condition, the flow waves of control It is dynamic big, and by the temperature computation degree of superheat of the entry position of outlet and the second heat exchanger channels to the first heat exchanger channels as tune Whole foundation can also assure system control without the concern for the influence of the factors such as environment temperature while simplifying control logic Stability.
Such as Fig. 1, in one embodiment of the invention, further, economizer 40 further includes the outlet of the second heat exchanger channels 44, the second heat exchanger channels outlet 44 is connected with the first port of outdoor heat exchanger 30, air injection enthalpy-increasing air-conditioning system further include: the Two restricting elements 60, are arranged on the pipeline that the second heat exchanger channels are connected with outdoor heat exchanger 30；Control device and the second section Stream device is connected, for obtaining the adjusting parameter of the second restricting element 60, based on first throttle element 50 and the second throttling member In the case that part 60 adjusts aperture with identical adjusting parameter, control first throttle element 50 is opened in the adjustment of the second restricting element 60 Aperture is adjusted again after the first preset duration after degree.
In this embodiment, the second restricting element 60 selects electric expansion valve, and the second restricting element 60 makes medium temperature high pressure Liquid coolant becomes the moist steam of low-temp low-pressure by its throttling, enters outdoor heat exchanger 30 and absorbs heat, control device is used In the aperture of the second restricting element 60 of control, while the aperture of first throttle element 50 and the second restricting element 60 is adjusted When, flowing of the refrigerant in economizer 40 can generate fluctuation, thus will affect the testing result of each position detection device, thus Make the state that adjustment aperture is constantly in first throttle valve and second throttle.Therefore, in first throttle element 50 and second When restricting element 60 is needed while being controlled to adjust aperture, control device needs after controlling the movement of the second restricting element 60 After the first preset duration, then the movement of first throttle element 50 is controlled, avoids first throttle element 50 and the second restricting element 60 long-times are in fluctuation status.
Such as Fig. 1, in one embodiment of the invention, further, air injection enthalpy-increasing air-conditioning system further include: solenoid valve 70, it is arranged on the pipeline that the outlet of the first heat exchanging pipe is connected with the air entry of compressor 10；Control device and solenoid valve 70 It is connected, for obtaining and controlling the aperture parameter of solenoid valve 70.
In this embodiment, solenoid valve 70 is the normally closed solenoid valve 70 being arranged between economizer 40 and compressor 10, control Device processed is used to control the aperture of solenoid valve 70, when needing to carry out supplement gaseous coolant to compressor 10 using economizer 40, Control device controls solenoid valve 70 and opens.
Such as Fig. 1, in one embodiment of the invention, further, air injection enthalpy-increasing air-conditioning system further include: the first thermometric Device 100, setting is at the first heat exchanger channels outlet 42, for obtaining the first measurement temperature；Second temperature measuring equipment 110, setting At the second heat exchanger channels entrance 43, for obtaining the second measurement temperature；First temperature measuring equipment 100 and the second temperature measuring equipment 110 It is connected with control device.
In this embodiment, by the first temperature measuring equipment 100 and setting that the outlet of the first heat exchanger channels is arranged in the Second temperature measuring equipment 110 of two heat exchanger channels entrances 43 is to obtain the first measurement temperature and the second measurement temperature, control device It is connect with the first temperature measuring equipment 100 and the second temperature measuring equipment 110, available first measurement temperature and the second measurement temperature, control Device processed calculates the degree of superheat according to the first measurement temperature and the second measurement temperature, thus according to the degree of superheat to first throttle element 50 aperture is controlled.
Such as Fig. 1, in one embodiment of the invention, further, air injection enthalpy-increasing air-conditioning system further include: low-pressure tank 80, first port is connected with the gas returning port of compressor 10；Reversal valve 90, the first port and outdoor unit of reversal valve 90 exchange heat The second port of device is connected, and the second port of reversal valve 90 is connected with the exhaust outlet of compressor 10, the third of reversal valve 90 Port is connected with the tracheae of indoor set heat exchanger, and the 4th port of reversal valve 90 is connected with the second port of low-pressure tank 80； Control device is connected with reversal valve 90, commutates for controlling reversal valve 90.
In air-conditioning system of the invention, it is connected by the exhaust pipe that reversal valve 90 controls compressor 10 with indoor unit tracheae Logical, the liquid pipe of outdoor unit is connected into heating mode with low-pressure tank 80, and gas coolant enters in compressor 10 by compressor The gas that 10 pressurizations become high temperature and pressure is entered in indoor set heat exchanger by exhaust outlet by reversal valve 90, and refrigerant is indoors Condensation liquefaction heat release in heat exchanger 20, becomes liquid and enters in economizer 40 and shunt, and passes through restricting element and depressurize, a part Be directly entered flow into outdoor unit heat exchange after enter low-pressure tank 80, returned in compressor 10 by gas returning port, another part directly into Enter into compressor 10.It is connect by the exhaust pipe that reversal valve 90 controls compressor 10 with outdoor unit heat exchanger, the row of indoor unit Liquid mouth is connected with low-pressure tank 80, and the gaseous coolant of gaseous coolant boil down to high temperature and pressure is then delivered to outdoor by compressor 10 Become normal temperature high voltage refrigerant after machine heat dissipation, the high pressure refrigerant of liquid enters in indoor unit by economizer 40, liquid refrigerants meeting Vaporization absorption heat, to play the effect of refrigeration, gaseous coolant returns in compressor 10 from reversal valve 90 is flowed through in indoor unit.
In this embodiment, low-pressure tank 80 is connected with the gas returning port of compressor 10, can separate and save in muffler Liquid prevents compressor 10 from liquid hammer occurs, and plays the role of adjusting flow, and control device is connected with reversal valve 90, fills control Setting can control reversal valve 90 and commutates, and the first port of reversal valve 90, second port, third port and the 4th port point Not with the of the second port of outdoor unit heat exchanger, the exhaust outlet of compressor 10, the tracheae of indoor set heat exchanger and low-pressure tank 80 Two-port netwerk is connected, and the operational mode for controlling air-conditioning system can be adjusted by the commutation to reversal valve 90.
As shown in Fig. 2, the embodiment of the second aspect of the present invention provides a kind of controlling party of air injection enthalpy-increasing air-conditioning system Method, the air injection enthalpy-increasing air-conditioning system including any one of such as above-mentioned first aspect embodiment, control method include:
S102 obtains the first measurement temperature of the first heat exchanger channels outlet of economizer and the second heat exchanger channels of economizer Second measurement temperature of entrance；
S104 adjusts the aperture of first throttle element according to the first measurement temperature and the second measurement temperature.
In a kind of control method of air injection enthalpy-increasing air-conditioning system provided by the invention, the first heat exchange is got in control device Channel outlet temperature and the second heat exchanger channels inlet temperature are measured as the first measurement temperature and the second measurement temperature by first Temperature and the second measurement temperature carry out that the degree of superheat is calculated, and are controlled according to aperture of the degree of superheat to first throttle element, Enter compressor gas using the first measurement temperature come in the acquisition of various heat exchange channel and the second measurement temperature as regulation economizer The adjusting foundation of body coolant quantity, compared with the prior art in exchanged heat using the temperature of the outlet of the first heat exchanger channels and entrance or the Channel outlet and entrance have better stability, due to the entrance of a single heat exchanger channels as foundation is adjusted As according to the degree of superheat section different according to other parameter settings such as different environment temperatures is needed, control logic is set temperature More complicated, serious forgiveness is not high, and since environment temperature can have multiple boundary conditions, is in boundary condition in environment temperature When, the flowed fluctuation of control is big, and the temperature of the entry position by outlet and the second heat exchanger channels to the first heat exchanger channels Calculating the degree of superheat can be without the concern for the influence of the factors such as environment temperature, while simplifying control logic as adjustment foundation Also assure the stability of system control.
As shown in figure 3, another embodiment of the present invention provides a kind of control method of air injection enthalpy-increasing air-conditioning system, into One step, further includes:
S202 obtains the first measurement temperature of the first heat exchanger channels outlet of economizer and the second heat exchanger channels of economizer Second measurement temperature of entrance；
S204 determines that the first measurement temperature and the temperature gap of the second measurement temperature control first segment according to temperature gap Fluid element adjusts relation data according to aperture every the second preset duration and adjusts an aperture.
In this embodiment, temperature gap, temperature gap are obtained according to the first measurement temperature and the second measurement temperature computation The as degree of superheat is adjusted every the second preset duration again according to adjustment relationship again, is played according to temperature gap reality Shi Bianhua is adjusted in real time.
Another embodiment of the present invention provides a kind of control methods of air injection enthalpy-increasing air-conditioning system, further, also It include: that aperture adjustment relation data is temperature gap, adjusts step number, the corresponding relation data of adjustment direction.
In this embodiment, first throttle element selects electric expansion valve, electric expansion valve there are expansion valve step number, according to The corresponding relationship of the temperature difference detected and adjustment expansion step number and expansion direction is adjusted.Temperature gap can be set and adjust It is positive correlation between synchronizing number, wherein the temperature gap the big, adjusts that step number is bigger, and temperature gap is smaller, adjusts step number It is smaller, and temperature difference be positive number when adjustment direction be positive, adjustment direction is negative when temperature difference is negative, and realizes according to different temperatures Difference corresponding different adjustment step number and adjustment direction with pair the aperture of first throttle element be adjusted, make the standard of aperture regulation True property further increases, to improve the stability of system.
Adjustment relationship as shown in Figure 4, as temperature difference T difference corresponds to different adjustment step number P, wherein temperature difference T with Adjustment step number P is positive correlation, i.e. the temperature difference T the big, and the increasing value for adjusting step number P is bigger.
Another embodiment of the present invention provides a kind of control methods of air injection enthalpy-increasing air-conditioning system, further, control Method processed further include: the adjusting parameter for obtaining the second restricting element is needed based on first throttle element with the second restricting element synchronous In the case where adjusting aperture, control first throttle element is adjusted again after the second restricting element adjusts the first preset duration after aperture Whole aperture.
In this embodiment, when control device receives the adjusting parameter being adjusted to the second restricting element, confirmation The control parameter to first throttle element whether is had received simultaneously, is needing while adjusting first throttle element and the second throttling When the aperture of element, the second restricting element of control is first carried out, is adjusted first throttle element again after the first preset duration Aperture, while when the aperture of first throttle element and the second restricting element is adjusted, flowing of the refrigerant in economizer Fluctuation can be generated, to will affect the testing result of each position detection device, to make first throttle valve and second throttle It is constantly in adjustment aperture state.Therefore, it needs while is controlled to adjust in first throttle element and the second restricting element When aperture, control device is after needing to wait for the first preset duration after controlling the movement of the second restricting element, then controls first throttle member Part movement, avoids first throttle element and the second restricting element is in fluctuation status for a long time.
As shown in figure 5, another embodiment of the present invention provides a kind of control method of air injection enthalpy-increasing air-conditioning system, into One step, further includes:
S302, receives power-on instruction, and control first throttle element is adjusted to default initial opening；
S304 judges whether solenoid valve in the open state and continues third preset duration, judging result be to execute Otherwise S306 continues to execute S304；
S306 obtains the first measurement temperature of the first heat exchanger channels outlet of economizer and the second heat exchanger channels of economizer Second measurement temperature of entrance；
S308 determines that the first measurement temperature and the temperature gap of the second measurement temperature control first segment according to temperature gap Fluid element adjusts relation data according to aperture every the second preset duration and adjusts an aperture.
In this embodiment, after air-conditioner set booting, temperature measured by the first temperature measuring equipment and the second temperature measuring equipment It will receive the influence of environment temperature, if directly according to the first measurement temperature detected when being just switched on and the second measurement temperature pair First throttle element, which carries out control, can generate deviation, therefore, after control first throttle element adjusted value presets aperture, by solenoid valve It opens, economizer is made to carry out coolant adding to compressor, compressor is made to improve power, after lasting third scheduled duration, execute The step of being adjusted first throttle valve according to temperature difference makes air-conditioner set system first opening according to the first throttle valve preset Degree operation a period of time guarantees that collected first measurement temperature and the second measurement temperature keep stable state, then is connect down Come the step of being adjusted to first throttle element.
As shown in fig. 6, another embodiment of the present invention provides a kind of control method of air injection enthalpy-increasing air-conditioning system, into One step, further includes:
S402, receives power-on instruction, and control first throttle element is adjusted to default initial opening；
S404 judges whether solenoid valve in the open state and continues third preset duration, judging result be to execute Otherwise otherwise S406 continues to execute S404；
S406 obtains the first measurement temperature of the first heat exchanger channels outlet of economizer and the second heat exchanger channels of economizer Second measurement temperature of entrance；
S408 determines that the first measurement temperature and the temperature gap of the second measurement temperature control first segment according to temperature gap Fluid element adjusts relation data according to aperture every the second preset duration and adjusts an aperture.
S410, judges whether solenoid valve is in close state, and judging result is then to execute S412 when being, judging result is no When then execute S406；
S412 adjusts the aperture of first throttle element to default initial opening.
In the technical scheme, solenoid valve is normally off, judge compressor do not need economizer carry out coolant adding When, control solenoid valve returns to closed state and is no longer flow into compressor after solenoid valve is closed from the refrigerant flowed out in economizer, Control first throttle element is restored to initial aperture at this time, guarantees the stability of system.
As shown in fig. 7, another embodiment of the present invention provides a kind of control method of air injection enthalpy-increasing air-conditioning system, into One step, further includes:
S502, receives power-on instruction, and control first throttle element is adjusted to default initial opening；
S504, judges whether solenoid valve needs to open, otherwise judging result continues to execute S504 to be to execute S506；
S506, opens solenoid valve；
S508 judges whether solenoid valve in the open state and continues third preset duration, judging result be to execute Otherwise S510 continues to execute S508；
S510 obtains the first measurement temperature of the first heat exchanger channels outlet of economizer and the second heat exchanger channels of economizer Second measurement temperature of entrance；
S512 determines that the first measurement temperature and the temperature gap of the second measurement temperature control first segment according to temperature gap Fluid element adjusts relation data according to aperture every the second preset duration and adjusts an aperture.
S514, judges whether solenoid valve needs to close, and judging result is that S516 is then executed when being, when judging result is no then Execute S510；
S516 closes solenoid valve, adjusts the aperture of first throttle element to default initial opening.
In this embodiment, in booting, control first throttle element is adjusted to default aperture, by judging compressor Economizer whether is needed to carry out coolant adding to whether opens solenoid valve judges, after opens solenoid valve, in economizer Refrigerant enters in compressor, and starts to be adjusted according to aperture of the temperature difference to first throttle element, is needing to close electromagnetism When valve, closes solenoid valve and restore first throttle element aperture to initial opening, guarantee the stability of system.
As shown in figure 8, providing a kind of air injection enthalpy-increasing air-conditioning 200, including deposit in the embodiment of third aspect present invention Reservoir 210, for storing computer program；Processor 220, for executing computer program to realize that second aspect of the present invention is sprayed The control method of gas increasing enthalpy air-conditioning system.Therefore, which includes that the air injection enthalpy-increasing in any of the above-described embodiment is empty Whole beneficial effects of control method.
In the embodiment of fourth aspect present invention, a kind of computer readable storage medium is provided, is stored thereon with meter Calculation machine program realizes the air injection enthalpy-increasing air-conditioning system in such as above-mentioned any embodiment when computer program is executed by processor, because This, which includes whole beneficial effects of the air injection enthalpy-increasing air-conditioning system in any of the above-described embodiment.
In the description of the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly, term The orientation or positional relationship of the instructions such as "upper", "lower" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific Orientation construction and operation, therefore be not considered as limiting the invention；Term " connection ", " installation ", " fixation " etc. should all It is interpreted broadly, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；It can be straight Connect it is connected, can also be indirectly connected through an intermediary.It for the ordinary skill in the art, can be according to specific feelings Condition understands the concrete meaning of above-mentioned term in the present invention.
In the description of the present invention, the description meaning of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Refer to that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention In example or example.In the present invention, schematic expression of the above terms are not necessarily referring to identical embodiment or example.And And the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable Mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (14)

1. a kind of air injection enthalpy-increasing air-conditioning system, including the compressor, indoor heat exchanger, outdoor heat exchange to form coolant loop Device, which is characterized in that further include:
Economizer has the first heat exchanger channels entrance, the outlet of the first heat exchanger channels, the second heat exchanger channels entrance, and described first changes Passage of heat entrance and the second heat exchanger channels entrance are connected with the indoor heat exchanger, first heat exchanger channels outlet with The jet port of the compressor is connected；
First throttle element is arranged on the pipeline that the first heat exchanger channels entrance is connected with the indoor heat exchanger；
Control device is connected with the first throttle element, the first measurement for being exported according to first heat exchanger channels Second measurement temperature of temperature and the second heat exchanger channels entrance, adjusts the aperture of the first throttle element.
2. air injection enthalpy-increasing air-conditioning system according to claim 1, which is characterized in that the economizer further includes the second heat exchange Channel outlet, the second heat exchanger channels outlet are connected with the first port of the outdoor heat exchanger, and the air injection enthalpy-increasing is empty Adjusting system further include:
Second restricting element is arranged on the pipeline that second heat exchanger channels are connected with the outdoor heat exchanger；
The control device is connected with the second throttling device, for obtaining the adjusting parameter of second restricting element, In the case where adjusting aperture based on the first throttle element and second restricting element with identical adjusting parameter, institute is controlled It states first throttle element and adjusts aperture again after second restricting element adjusts the first preset duration after aperture.
3. air injection enthalpy-increasing air-conditioning system according to claim 1, which is characterized in that the air injection enthalpy-increasing air-conditioning system is also wrapped It includes:
Solenoid valve is arranged on the pipeline that the first heat exchanging pipe outlet is connected with the air entry of the compressor；
The control device is connected with the solenoid valve, for obtaining and controlling the aperture parameter of the solenoid valve.
4. air injection enthalpy-increasing air-conditioning system according to any one of claim 1 to 3, which is characterized in that the air injection enthalpy-increasing Air-conditioning system further include:
First temperature measuring equipment, setting is in first heat exchanger channels exit, for obtaining the first measurement temperature；
Second temperature measuring equipment, setting is in second heat exchanger channels inlet, for obtaining the second measurement temperature；
First temperature measuring equipment is connected with second temperature measuring equipment with the control device.
5. air injection enthalpy-increasing air-conditioning system according to claim 4, which is characterized in that the air injection enthalpy-increasing air-conditioning system is also wrapped It includes:
Low-pressure tank, first port are connected with the gas returning port of the compressor；
Reversal valve, the first port of the reversal valve are connected with the second port of the outdoor unit heat exchanger, the reversal valve Second port be connected with the exhaust outlet of the compressor, the third port of the reversal valve and the indoor set heat exchanger Tracheae is connected, and the 4th port of the reversal valve is connected with the second port of the low-pressure tank；
The control device is connected with the reversal valve, for controlling the reversal valve commutation.
6. a kind of control method of air injection enthalpy-increasing air-conditioning system, which is characterized in that the air injection enthalpy-increasing air-conditioning system is such as right It is required that air injection enthalpy-increasing air-conditioning system described in any one of 1 to 5, the control method include:
Obtain the first measurement temperature of the first heat exchanger channels outlet of the economizer and the second heat exchanger channels of the economizer Second measurement temperature of entrance；
According to the first measurement temperature and the second measurement temperature, the aperture of the first throttle element is adjusted.
7. the control method of air injection enthalpy-increasing air-conditioning system according to claim 6, which is characterized in that described according to described One measurement temperature and the second measurement temperature, the step of adjusting the aperture of the first throttle element, specifically include:
Determine that the first measurement temperature and the temperature gap of the second measurement temperature control institute according to the temperature gap It states first throttle element and a relation data aperture of adjustment is adjusted according to aperture every the second preset duration.
8. the control method of air injection enthalpy-increasing air-conditioning system according to claim 7, which is characterized in that
The aperture adjustment relation data is temperature gap, adjustment step number, the corresponding relation data of adjustment direction.
9. the control method of air injection enthalpy-increasing air-conditioning system according to claim 7, the air injection enthalpy-increasing air-conditioning system is also wrapped Include the solenoid valve being arranged on the pipeline that the first heat exchanging pipe outlet is connected with the air entry of the compressor, Yi Jishe The second restricting element on the pipeline that the second heat exchanger channels in the economizer are connected with the outdoor heat exchanger is set, it is special Sign is, the control method further include:
The adjusting parameter of second restricting element is obtained, based on the first throttle element with second restricting element with phase In the case where same adjusting parameter adjustment aperture, the first throttle element is controlled after second restricting element adjusts aperture The first preset duration after adjust aperture again.
10. the control method of air injection enthalpy-increasing air-conditioning system according to any one of claims 6 to 9, which is characterized in that institute State control method further include:
Power-on instruction is received, the first throttle element is controlled and adjusts to default initial opening.
11. the control method of air injection enthalpy-increasing air-conditioning system according to claim 10, which is characterized in that controlling described the One restricting element is adjusted to default aperture, further includes:
After confirming that the solenoid valve is in the open state and continuing third preset duration, execute described according to the first measurement temperature The step of degree and the second measurement temperature adjust the aperture of the first throttle element.
12. the control method of air injection enthalpy-increasing air-conditioning system according to claim 11, which is characterized in that described according to institute After the step of stating the first measurement temperature and the second measurement temperature, adjusting the aperture of the first throttle element, further includes:
Confirm that the solenoid valve is again at closed state, aperture to described preset for adjusting the first throttle element is initially opened Degree.
13. a kind of air injection enthalpy-increasing air-conditioning characterized by comprising
Memory, for storing computer program；
Processor, for executing the computer program to realize:
The control method of air injection enthalpy-increasing air-conditioning system as described in any one of claim 6 to 12.
14. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program The control method of the air injection enthalpy-increasing air-conditioning system as described in any one of claim 6 to 12 is realized when being executed by processor.
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Cited By (5)

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CN114992907A (en) * 2021-03-02 2022-09-02 广东美的暖通设备有限公司 Control method of heat pump system, and readable storage medium
CN114992924A (en) * 2021-03-02 2022-09-02 广东美的暖通设备有限公司 Economizer opening temperature determination method and device and air conditioning system
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CN111442559A (en) * 2020-04-13 2020-07-24 广东美的暖通设备有限公司 Enhanced vapor injection system, control method and device thereof, heating equipment and electronic equipment
CN114992908A (en) * 2021-03-02 2022-09-02 广东美的暖通设备有限公司 Heat pump system, control method of heat pump system, and readable storage medium
CN114992907A (en) * 2021-03-02 2022-09-02 广东美的暖通设备有限公司 Control method of heat pump system, and readable storage medium
CN114992924A (en) * 2021-03-02 2022-09-02 广东美的暖通设备有限公司 Economizer opening temperature determination method and device and air conditioning system
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CN114992908B (en) * 2021-03-02 2023-12-22 广东美的暖通设备有限公司 Heat pump system, control method of heat pump system, and readable storage medium
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CN115962529A (en) * 2023-02-20 2023-04-14 广东美的制冷设备有限公司 Air conditioning system, enthalpy injection control method of air conditioning system, and readable storage medium
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