CN105526683B - A kind of control method and device of air-conditioning system - Google Patents
A kind of control method and device of air-conditioning system Download PDFInfo
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- CN105526683B CN105526683B CN201610093816.2A CN201610093816A CN105526683B CN 105526683 B CN105526683 B CN 105526683B CN 201610093816 A CN201610093816 A CN 201610093816A CN 105526683 B CN105526683 B CN 105526683B
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- enthalpy compressor
- spray enthalpy
- temperature
- spray
- compressor
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
Abstract
The application provides a kind of control method and device of air-conditioning system, is applied to the controller of air-conditioning system, and method includes：Before receiving heating open command, the skin temperature that enthalpy compressor is sprayed described in the temperature sensor continuous collecting on spray enthalpy compressor case is utilized；In the case where the skin temperature is less than the first temperature value, the stator winding into the spray enthalpy compressor conveys predetermined current；In the case where the skin temperature is more than second temperature value, the stator winding stopped into the spray enthalpy compressor conveys the predetermined current；Wherein, first temperature value is less than the second temperature value.Since spray enthalpy compressor includes stator winding, oil sump, compression chamber and shell, and all parts are mutually close to therefore by thermal interaction, the heat that stator winding generates can be transferred to oil sump, compression chamber and shell.Therefore, by the way of stator winding heating, spray enthalpy compressor low temperature oil starvation and low temperature hydrops can be solved the problems, such as.
Description
Technical field
This application involves technical field of automation more particularly to a kind of control method and device of air-conditioning system.
Background technology
In general, air conditioner structure is mounted on outdoor outer machine and mounted on indoor interior machine two parts mainly by forming,
Outer owner will include compressor, oil eliminator, gas-liquid separator and outdoor heat exchanger (also referred to as condenser), and interior owner will include room
Interior heat exchanger (also referred to as evaporator), circulating in outer machine and interior machine has refrigerant.Refrigerant can between outer machine and interior machine into
The conversion (gaseous state or liquid) of row different shape, to realize the purpose of refrigeration or heating.
Since outer machine is mounted on outdoor, machine is easy other than institute is influenced by ambient temperature.When under ambient temperature
When being down to -20 DEG C or less, the gaseous refrigerant in compressor can be caused to become liquid refrigerant, this leads to compressor at runtime
Meeting compressed liquid refrigerant, and there is the impaired problem (i.e. low temperature hydrops problem) of compression chamber.
Also, since ambient temperature is relatively low, the lubricating oil viscosity in compressor in oil sump is caused to increase, this leads to compressor
Fuel feeding is obstructed, and the problem of compressor may being caused to burn out compressor because of oil starvation in the process of running, (i.e. low temperature oil starvation was asked
Topic).
Further, since ambient temperature reduces, the pressure of inspiration(Pi) of compressor can be caused to reduce, when suction pressure of compressor reduces
When, compression mechanism heat can be caused relatively low, and then compressor is caused the problem of heating overlong time occur.
In consideration of it, under normal circumstances, air-conditioning system can only be heated under -20 DEG C or more of environment, work as external environment
When temperature is less than -20 degrees Celsius, air-conditioning system may can not work normally.But it is more and more along with air-conditioning territory of use,
The use of air-conditioning has been at low ambient temperatures that must solve the problems, such as.
Accordingly, it is now desired to a kind of method, with solve air-conditioning system because ambient temperature is relatively low, caused by low temperature accumulate
Liquid, low temperature oil starvation and the low problem of low-temperature heating capacity, to control air-conditioning system normal work.
Invention content
Present inventor has found in the course of the research：Original compressor is replaced with into spray enthalpy compressor, using including spray
The air-conditioning system of enthalpy compressor, can solve that air-conditioning system is lower in ambient temperature, and the low-temperature heating capacity of appearance is low
Problem.
Improved air-conditioning system can introduce gaseous refrigerant, to improve spray in the middle pressure position of spray enthalpy compressor
Enthalpy compressor air-discharging amount, high pressure and delivery temperature, have the heating capacity under worst cold case the promotion of 25-30%.As for spray enthalpy
Compressor improves the concrete operating principle of heating capacity, is not the emphasis of the application, details are not described herein.
It is found by the applicant that：Although can solve the problems, such as that low-temperature heating capacity is decayed using spray enthalpy compressor, air-conditioning system
The problem of system still can be faced to low temperature hydrops and low temperature oil starvation.Accordingly, it is now desired to a kind of method, so as in spray enthalpy compressor
Air-conditioning system on the basis of, come solve the problems, such as because ambient temperature is relatively low, caused by low temperature hydrops and low temperature oil starvation,
To control air-conditioning system normal work.
To solve the above-mentioned problems, the application uses following technological means：
A kind of control method of air-conditioning system is applied to the controller of air-conditioning system, the method includes：
Before receiving heating open command, the temperature sensor continuous collecting on spray enthalpy compressor case is utilized
The skin temperature of the spray enthalpy compressor；
In the case where the skin temperature is less than the first temperature value, the stator winding conveying into the spray enthalpy compressor
Predetermined current；Wherein, the predetermined current is less than the starting current of the spray enthalpy compressor；
In the case where the skin temperature is more than second temperature value, stop the stator winding into the spray enthalpy compressor
Convey the predetermined current；
Wherein, first temperature value is less than the second temperature value.
Preferably, after receiving heating open command, the method further includes：
It controls the air-conditioning system and carries out pre-heat phase；
When meeting preset condition, controls the air-conditioning system and enter the heating period.
Preferably, the control air-conditioning system progress pre-heat phase includes：
The spray enthalpy compressor is controlled to work with predeterminated frequency；Wherein, the predeterminated frequency is less than in the air-conditioning system
The commutating frequency of four-way valve；
During the spray enthalpy compressor is worked with the predeterminated frequency, arranged using mounted on the spray enthalpy compressor
First pressure sensor on tracheae detects the pressure at expulsion of the spray enthalpy compressor；
In the case where the pressure at expulsion is less than the first preset pressure value, using controlling, low temperature valve was closed, increasing enthalpy valve is opened
The mode opened controls refrigerant the first loop of circulation in the spray enthalpy compressor；
In the case where the pressure at expulsion is more than the second preset pressure value, using controlling, low temperature valve was opened, increasing enthalpy valve closes
The mode closed controls refrigerant the second loop of circulation in the spray enthalpy compressor；Second preset pressure value is more than described
First preset pressure value；
Wherein, first loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and increasing enthalpy
Valve group at；Second loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and gas-liquid separator
Composition.
Preferably, the determination process for meeting preset condition includes：
Using the second pressure sensor on the spray enthalpy compressor suction duct, the spray enthalpy compressor is detected
Pressure of inspiration(Pi)；
When judge the pressure of inspiration(Pi) be more than first preset pressure value and it is described cross low temperature valve and open when, determine meet it is pre-
If condition.
Preferably, further include：
When judge the pressure of inspiration(Pi) no more than first preset pressure value or it is described cross low temperature valve and close when, determine discontented
Sufficient preset condition.
A kind of control device of air-conditioning system, is integrated in the controller of air-conditioning system, and described device includes：
Collecting unit, for before receiving heating open command, utilizing the temperature on spray enthalpy compressor case
The skin temperature of enthalpy compressor is sprayed described in sensor continuous collecting；
Supply unit is used in the case where the skin temperature is less than the first temperature value, into the spray enthalpy compressor
Stator winding convey predetermined current；Wherein, the predetermined current is less than the starting current of the spray enthalpy compressor；
Stop unit, in the case where the skin temperature is more than second temperature value, stopping compressing to the spray enthalpy
Stator winding in machine conveys the predetermined current；
Wherein, first temperature value is less than the second temperature value.
Preferably, further include：
Pre-add thermal control units carry out pre-heat phase for controlling the air-conditioning system；
Heat control unit enters the heating period for when meeting preset condition, controlling the air-conditioning system.
Preferably, the pre-add thermal control units include：
Frequency cells are controlled, are worked with predeterminated frequency for controlling the spray enthalpy compressor；Wherein, the predeterminated frequency is small
The commutating frequency of four-way valve in the air-conditioning system；
First detection unit, for during the spray enthalpy compressor is worked with the predeterminated frequency, utilizing installation
First pressure sensor on the spray enthalpy compressor exhaust pipe detects the pressure at expulsion of the spray enthalpy compressor；
First control unit, in the case where the pressure at expulsion is less than the first preset pressure value, using controlling
The mode that low temperature valve is closed, increasing enthalpy valve is opened controls refrigerant the first loop of circulation in the spray enthalpy compressor；
Second control unit, in the case where the pressure at expulsion is more than the second preset pressure value, using controlling
The mode that low temperature valve is opened, increasing enthalpy valve is closed controls refrigerant the second loop of circulation in the spray enthalpy compressor；Described second is pre-
If pressure value is more than first preset pressure value；
Wherein, first loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and increasing enthalpy
Valve group at；Second loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and gas-liquid separator
Composition.
Preferably, the heat control unit includes：
Second detection unit, for utilizing the second pressure sensor being mounted on the spray enthalpy compressor suction duct, inspection
Survey the pressure of inspiration(Pi) of the spray enthalpy compressor；
Determination unit judges that the pressure of inspiration(Pi) is more than first preset pressure value and the low temperature valve of crossing is opened for working as
When, determination meets preset condition.
Preferably, further include：
Nack unit, for being closed no more than first preset pressure value or the low temperature valve of crossing when the judgement pressure of inspiration(Pi)
When closing, determination is unsatisfactory for preset condition.
It can be seen that the application has the advantages that by the above technological means：
Due to spray enthalpy compressor shell be also in external environment, it is possible to sensing external environment temperature it is cold and hot,
In addition the variation in oil sump and compression chamber is not easy to acquire, and therefore, the application is using the variation for spraying enthalpy compressor case temperature
To control whether to heat stator winding.
The application can execute the self-heating process of spray enthalpy compressor before receiving heating open command.The tool of self-heating
Body process is：In the case where skin temperature is less than the first temperature value, the stator winding circulation of controller control spray enthalpy compressor
Predetermined current.Since predetermined current is less than the starting current of spray enthalpy compressor, so stator winding will not operate.But stator
Winding can generate heat during circulating predetermined current.
Since spray enthalpy compressor includes stator winding, oil sump, compression chamber and shell, all parts mutually close to.Cause
This, by thermal interaction, the heat that stator winding generates can be transferred to oil sump, compression chamber and shell, so that
Lubricating oil temperature in oil sump increases, so that lubricating oil viscosity reduces；Also, it can also make the refrigerant in compression chamber
Temperature increases, to gradually become gaseous refrigerant by liquid refrigerant.By the way of stator winding heating, it can solve to spray
The problem of enthalpy compressor low temperature oil starvation and low temperature hydrops.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structure chart of air-conditioning system disclosed in the embodiment of the present application；
Fig. 2 is the flow chart of the control method of air-conditioning system disclosed in the embodiment of the present application；
Fig. 3 is the structure chart of compressor in air-conditioning system disclosed in the embodiment of the present application；
Fig. 4 is the flow chart of the control method of another air-conditioning system disclosed in the embodiment of the present application；
Fig. 5 is the flow chart of the control method of another air-conditioning system disclosed in the embodiment of the present application；
Fig. 6 is the flow chart of the control method of another air-conditioning system disclosed in the embodiment of the present application；
Fig. 7 is the structural schematic diagram of the control device of air-conditioning system disclosed in the embodiment of the present application；
Fig. 8 is the structural schematic diagram of the control device of another air-conditioning system disclosed in the embodiment of the present application；
Fig. 9 is the structural schematic diagram of the control device of another air-conditioning system disclosed in the embodiment of the present application；
Figure 10 is the structural schematic diagram of the control device of another air-conditioning system disclosed in the embodiment of the present application.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Referring to Fig. 1, to include the air-conditioning system of spray enthalpy compressor.
Air-conditioning system includes：Temperature sensor 101, spray enthalpy compressor 102, increasing enthalpy valve 103, oil eliminator 104, four-way valve
105, outdoor heat exchanger 106, heating electric expansion valve 107, subcooler electric expansion valve 108, subcooler 109, cross low temperature valve 110,
First pressure sensor 111, second pressure sensor 112, gas-liquid separator 113, interior machine electric expansion valve 114 and indoor heat exchange
Device 115.Certainly, further include other component in air-conditioning system, since other components are that this application involves contents is less,
Its component is not shown in the example shown.
Based on above-mentioned air-conditioning system shown in FIG. 1, this application provides a kind of control methods of air-conditioning system, are applied to sky
The controller of adjusting system (diagram is not shown).As shown in Fig. 2, the method includes：
Step S201：Before receiving heating open command, the temperature sensing on spray enthalpy compressor case is utilized
The skin temperature of enthalpy compressor is sprayed described in device continuous collecting.
Referring to Fig. 3, spray enthalpy compressor housing, compression chamber, stator winding and oil sump, certainly also other components, herein
It is not shown.Spray enthalpy compressor is in external environment, and circulating in compression chamber has refrigerant, and circulating in oil sump has lubricating oil.When
When ambient temperature residing for compression chamber is relatively low, the refrigerant in compression chamber can be caused to be converted to liquid by gaseous state；When oil sump
When residing ambient temperature is relatively low, the lubricating oil viscosity in oil sump can be caused to increase；These can influence spraying enthalpy compressor just
Often work.Therefore, it when the ambient temperature residing for compression chamber and oil sump is relatively low, needs to execute heating work.
Since spray enthalpy compressor housing and compression chamber and oil sump are in same external environment, it is possible to by spraying enthalpy
Whether the skin temperature of compressor, the ambient temperature to judge compression chamber and oil sump local environment are relatively low.Due to temperature compared with
In the case of low, control spray enthalpy compressor operating can damage spray enthalpy compressor, therefore, in spray enthalpy compressor in the present embodiment
It receives before heating open command (i.e. before spraying enthalpy compressor operating), controller, which utilizes, to be mounted on spray enthalpy compressor housing
Temperature sensor 101 carry out the skin temperature of continuous collecting spray enthalpy compressor, to understand the outer of spray enthalpy compressor local environment
Whether boundary's temperature is relatively low.
Step S202：Judge otherwise whether skin temperature enters less than the first temperature value if so, entering step S203
Step S201.
It is prestored in controller and is useful for indicating lower first temperature value of ambient temperature.When ambient temperature is less than first
When temperature value, the refrigerant in compression chamber may be converted to liquid by gaseous state, and lubricating oil meeting viscosity is larger in oil sump.
Therefore, controller is after the skin temperature collected from temperature sensor, by skin temperature and the first temperature
Value is compared, if skin temperature is more than the first temperature value, illustrates to spray the ambient temperature of enthalpy compressor local environment not at present
It is especially low, therefore heating process need not be carried out.If skin temperature is less than the first temperature value, illustrate to spray enthalpy compressor institute at present
The ambient temperature for locating environment is relatively low, needs to carry out compressor self-heating process.
Step S203：In the case where the skin temperature is less than the first temperature value, determine into the spray enthalpy compressor
Sub- winding conveys predetermined current；Wherein, the predetermined current is less than the starting current of the spray enthalpy compressor.
Since the spray current local environment temperature of enthalpy compressor is relatively low, heating rashly can cause to spray enthalpy compressor damage, therefore,
First carry out spray enthalpy compressor self-heating process.Spraying the detailed process of enthalpy compressor self-heating can be：Controller control spray enthalpy pressure
The stator winding circulation predetermined current of contracting machine.A predetermined current preset current value in device, also, default electricity in order to control
Stream is less than the starting current of spray enthalpy compressor.
Since predetermined current is less than the starting current of spray enthalpy compressor, so after the predetermined current that circulates in stator winding, it is fixed
Sub- winding will not operate.But since the resistance value of stator winding is larger, more heat is generated during circulating predetermined current
Amount.Since spray enthalpy compressor includes stator winding, oil sump, compression chamber and shell, all parts are mutually close to therefore passing through
Thermal interaction, the heat that stator winding generates can be transferred to oil sump, compression chamber and shell.
After the heat that stator winding generates reaches oil sump, the lubricating oil temperature in oil sump increases, so that lubricating oil viscosity
Degree reduces, to solve the problems, such as spray enthalpy compressor low temperature oil starvation.After the heat that stator winding generates reaches compression chamber, compression
Refrigerant temperature in cavity increases, to gradually become gaseous refrigerant by liquid refrigerant, to solve spray enthalpy compressor
Low temperature hydrops problem.That is, by the way of stator winding heating, spray enthalpy compressor low temperature oil starvation and low temperature hydrops can be solved
Problem.
The heat of stator winding is gradually to be transferred to oil sump and compression chamber, also, the lubricating oil in oil sump and compression
Refrigerant in cavity will not heat up immediately, after needing one section of heating time, can just reach in oil sump lubricating oil viscosity reduce,
Refrigerant is converted to liquid this purpose by gaseous state in compression chamber.Therefore, it is necessary to determine stator winding by a mode
Heating time.
Since the temperature of oil sump and compression chamber and spray enthalpy compressor case temperature difference are little, spray can be passed through
The skin temperature of enthalpy compressor heats oil sump and compression chamber to decide whether to continue with stator winding.
Step S204：Judge whether skin temperature is more than second temperature value, if so, entering step S205, otherwise again
Enter step S204.Wherein, first temperature value is less than the second temperature value.
Controller is internally provided with second temperature value, and second temperature value is for indicating that lubricating oil temperature has been raised in oil sump
To a certain degree, lubricating oil viscosity is relatively low at this time；Also, the refrigerant in compression chamber has been raised to certain temperature, at this time
Refrigerant is gaseous state.
When skin temperature has been above second temperature value in electronics winding heating process, then illustrate stator winding at this time
Heated a period of time has achieved the purpose that heat in oil sump refrigerant in lubricating oil and compression chamber, can stop at this time
Heating process.Otherwise, heating process is continued to execute.
Step S205：In the case where the skin temperature is more than second temperature value, stop into the spray enthalpy compressor
Stator winding convey the predetermined current.
That is, in the case where skin temperature is more than second temperature value, stop conveying predetermined current to stator winding, hereafter,
Stator winding can gradually cool down, and along with the cooling of stator winding, shell, oil sump and compression chamber also can constantly cool down.When outer
Shell temperature be less than the first temperature value when, the above process can be repeated, so as to maintain spray enthalpy compressor the problem of in the first temperature
Between value and second temperature value.
The application is can be seen that by the above technological means to have the advantages that：
The application can execute the self-heating process of spray enthalpy compressor, the tool of self-heating before receiving heating open command
Body process is：The stator winding circulation predetermined current of controller control spray enthalpy compressor.Since predetermined current is less than spray enthalpy compression
The starting current of machine, so stator winding will not operate.But stator winding can generate heat during circulating predetermined current
Amount.
Since spray enthalpy compressor includes stator winding, oil sump, compression chamber and shell, all parts mutually close to.Cause
This, by thermal interaction, the heat that stator winding generates can be transferred to oil sump, compression chamber and shell, so that
Lubricating oil temperature in oil sump increases, so that lubricating oil viscosity reduces；Also, it can also make the refrigerant in compression chamber
Temperature increases, to gradually become gaseous refrigerant by liquid refrigerant.By the way of stator winding heating, it can solve to spray
The problem of enthalpy compressor low temperature oil starvation and low temperature hydrops.
Although by way of spraying enthalpy compressor self-heating, low temperature in spray enthalpy compressor can be solved to a certain extent and is lacked
The problem of oil and low temperature hydrops.But it is found by the applicant that other than spraying enthalpy compressor 102, when external environment is relatively low, referring to
Shown in Fig. 1, the refrigerant in oil eliminator 104, outdoor heat exchanger 106 and gas-liquid separator 113 can also become liquid, to shadow
Ring the normal work of air-conditioning system.Therefore, the application also needs to solve oil eliminator 104, outdoor heat exchanger 106 and gas-liquid separation
There is the problem of hydrops in device 113.
For this purpose, after receiving heating open command, present invention also provides following technological means.As shown in figure 4, specific
Include the following steps：
Step S401：It controls the air-conditioning system and carries out pre-heat phase.
Lower mask body introduction control control air-conditioning system carries out the specific implementation procedure of pre-heat phase, shown in Figure 5,
Specifically include following steps：
Step S501：The spray enthalpy compressor is controlled to work with predeterminated frequency；Wherein, the predeterminated frequency is less than the sky
The commutating frequency of four-way valve in adjusting system.
Since refrigerant is liquid in gas-liquid separator 113, oil eliminator 104 and outdoor heat exchanger 106, so,
Control spray enthalpy compressor first carries out work with predeterminated frequency and predeterminated frequency cannot be excessively high.Because if if predeterminated frequency is excessively high,
Can then cause spray enthalpy compressor it is excessive from the pressure of inspiration(Pi) of gas-liquid separator 113, may cause spray enthalpy compressor generate liquid hammer,
Damage spray enthalpy compressor.Since the suction frequency of spray enthalpy compressor is directly proportional to the commutating frequency of four-way valve, it is preheating
Stage sprays commutating frequency of the predeterminated frequency less than four-way valve of enthalpy compressor, excessively high with blowout prevention enthalpy compressor operating frequency, and goes out
The problem of now spraying enthalpy compressor liquid hammer.
Step S502：During the spray enthalpy compressor is worked with the predeterminated frequency, using mounted on the spray
First pressure sensor on enthalpy compressor exhaust pipe detects the pressure at expulsion of the spray enthalpy compressor.
In spraying enthalpy compressor operation, initial period spray enthalpy compressor output refrigerant temperature and pressure compared with
Low, after running a period of time, the temperature and pressure of refrigerant can gradually rise.The system of different pressures is exported in spray enthalpy compressor
When cryogen, the circulation path of refrigerant is different.Therefore, controller is mounted on the first pressure on spray enthalpy compressor exhaust pipe
The pressure at expulsion of sensor acquisition spray enthalpy compressor.
Step S503：The pressure at expulsion be less than the first preset pressure value in the case of, using controlled low temperature valve close,
The mode that increasing enthalpy valve is opened controls refrigerant the first loop of circulation in the spray enthalpy compressor；Wherein, first loop by
Spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and increasing enthalpy valve group at.
The first preset pressure value is previously stored in controller, the first preset pressure value is for indicating spray enthalpy compressor output
Refrigerant pressure it is relatively low, at this point it is possible to control, low temperature valve 110 was closed, control increasing enthalpy valve 103 is opened so that refrigerant stream
Logical first loop.
It is closed, after the opening of increasing enthalpy valve 103 controlling low temperature valve 110, spray enthalpy compressor can gradually export high pressure-temperature
Gaseous refrigerant and lubricating oil composition gas mixture.After gas mixture exports after the exhaust of spray enthalpy compressor, meeting
By oil eliminator 104, oil eliminator 104 can be by lubricating oil separation out to export gaseous refrigerant.Gaseous refrigerant passes through
Four-way valve 105 is crossed, into outdoor heat exchanger 106.Then using heating electric expansion valve 107, subcooler electric expansion valve
108, subcooler 109 and increasing enthalpy valve 103 flow into inside spray enthalpy compressor 102.
Due to being high temperature liquid refrigerant from spray enthalpy compressor output, after the first circuit, high-temperature gas refrigeration
Agent utilizes the principle of heat exchange, and the heat of gaseous refrigerant is distributed to the refrigeration in oil eliminator 104 and outdoor heat exchanger 106
Agent, to improve the temperature of oil eliminator 104 and outdoor heat exchanger 106, to gradually so that oil eliminator 104 and outdoor heat exchange
Refrigerant has liquid to be changed into gaseous state in device 106.
Step S504：The pressure at expulsion be more than the second preset pressure value in the case of, using controlled low temperature valve open,
The mode that increasing enthalpy valve is closed controls refrigerant the second loop of circulation in the spray enthalpy compressor；Second preset pressure value
More than first preset pressure value；Wherein, second loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchange
Device, subcooler and gas-liquid separator composition.
Along with the increase of spray enthalpy Compressor Discharge Pressure, when the pressure at expulsion of spray enthalpy compressor is more than the second preset pressure
Value illustrates that the pressure at expulsion for spraying enthalpy compressor is excessive, can lead to spray enthalpy compressor if persistently increasing pressure due to pressure is excessive
Damage.Therefore, control increasing enthalpy valve 103 is closed at this time, the opening of low temperature valve 110 is controlled, so that refrigerant flows through second servo loop.
The process of second servo loop and the first circuit are unanimous on the whole, in the second loop after refrigerant passes through subcooler,
It is no longer pass through increasing enthalpy valve 103 but can flow by low temperature valve 110, then enter back into gas-liquid separator 113, to gas-liquid separator
Refrigerant is heated in 113, is finally flowed into spray enthalpy compressor 102.That is, when gaseous refrigerant device is in the mistake of circulation second servo loop
Cheng Zhong can heat the refrigerant in gas-liquid separator 113.
Then feedback diagram 4 enter step S402：When meeting preset condition, controls the air-conditioning system and enter heating rank
Section.
After step S401 executes a period of time, in oil eliminator 104, outdoor heat exchanger 106 and gasoline trap 113
Refrigerant have been converted into gaseous state, to realize in preheating process to oil eliminator 104, outdoor heat exchanger 106 and vapour
The purpose that refrigerant in oil eliminator 113 is heated.
In step S401 implementation procedures, when meeting preset condition, determine to oil eliminator 104, outdoor heat exchanger 106
With the refrigerant in gasoline trap 113 is heated finishes, preheating process can be terminated at this time, be directly entered heating rank
Section, to realize the purpose of air-conditioning heating.
Wherein, meet the determination process of preset condition in step S402, as shown in fig. 6, specifically including following steps：
Step S601：Using the second pressure sensor on the spray enthalpy compressor suction duct, the spray is detected
The pressure of inspiration(Pi) of enthalpy compressor；
Step S602：When judging that the pressure of inspiration(Pi) is more than first preset pressure value and the unlatching of low temperature valve excessively,
Determination meets preset condition.It is understood that when judging the pressure of inspiration(Pi) no more than first preset pressure value or institute
When stating low temperature valve closing, judgement is unsatisfactory for preset condition.
Since the output pressure in spray enthalpy compressor is gradually increasing, the pressure at expulsion of spray enthalpy compressor is less than
When the first preset pressure value, gaseous refrigerant flows through the first circuit；With gradually rising for pressure at expulsion, when pressure at expulsion is more than
When the second preset pressure value, gaseous refrigerant can flow through second servo loop.During flow second servo loop, gas-liquid point can be heated
From device 113.
Gas-liquid separator 113 during heating, the pressure inside gas-liquid separator 113 can gradually increase, and adjoint
It in spray enthalpy compressor suction duct sucking spray enthalpy compressor, therefore, when the pressure of inspiration(Pi) in spray enthalpy compressor suction duct is more than the
When one preset pressure value, then illustrate finish heated to gas-liquid separator.It can stop preheating at this time, spray enthalpy pressure from control
Contracting machine enters the heating period.
As shown in fig. 7, present invention also provides a kind of control device of air-conditioning system, it is integrated in the control of air-conditioning system
Device, described device include：
Collecting unit 71, for before receiving heating open command, utilizing the temperature on spray enthalpy compressor case
Spend the skin temperature that enthalpy compressor is sprayed described in sensor continuous collecting；
Supply unit 72 is used in the case where the skin temperature is less than the first temperature value, to the spray enthalpy compressor
Interior stator winding conveys predetermined current；Wherein, the predetermined current is less than the starting current of the spray enthalpy compressor；
Stop unit 73, in the case where the skin temperature is more than second temperature value, stopping to the spray enthalpy pressure
Stator winding in contracting machine conveys the predetermined current；
Wherein, first temperature value is less than the second temperature value.
As shown in figure 8, the control device of air-conditioning system provided by the present application further includes：
Pre-add thermal control units 81 carry out pre-heat phase for controlling the air-conditioning system；
Heat control unit 82 enters the heating period for when meeting preset condition, controlling the air-conditioning system.
Wherein, as shown in figure 9, the pre-add thermal control units include：
Frequency cells 91 are controlled, are worked with predeterminated frequency for controlling the spray enthalpy compressor；Wherein, the predeterminated frequency
Less than the commutating frequency of four-way valve in the air-conditioning system；
First detection unit 92, for during the spray enthalpy compressor is worked with the predeterminated frequency, utilizing peace
First pressure sensor on the spray enthalpy compressor exhaust pipe detects the pressure at expulsion of the spray enthalpy compressor；
First control unit 93, in the case where the pressure at expulsion is less than the first preset pressure value, utilizing control
The mode that low temperature valve is closed, increasing enthalpy valve is opened is crossed, refrigerant the first loop of circulation in the spray enthalpy compressor is controlled；
Second control unit 94, in the case where the pressure at expulsion is more than the second preset pressure value, utilizing control
The mode that low temperature valve is opened, increasing enthalpy valve is closed is crossed, refrigerant the second loop of circulation in the spray enthalpy compressor is controlled；Described second
Preset pressure value is more than first preset pressure value；
Wherein, first loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and increasing enthalpy
Valve group at；Second loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and gas-liquid separator
Composition.
Wherein, as shown in Figure 10, the heat control unit includes：
Second detection unit 101, for utilizing the second pressure sensor being mounted on the spray enthalpy compressor suction duct,
Detect the pressure of inspiration(Pi) of the spray enthalpy compressor；
Determination unit 102, for when judging that the pressure of inspiration(Pi) is more than first preset pressure value and described crosses low temperature valve
When unlatching, determination meets preset condition.
Nack unit 103, for being not more than first preset pressure value or the supercooling when the judgement pressure of inspiration(Pi)
When valve is closed, determination is unsatisfactory for preset condition.
It can be seen that the application has the advantages that by the above technological means：
Due to spray enthalpy compressor shell be also in external environment, it is possible to sensing external environment temperature it is cold and hot,
In addition the variation in oil sump and compression chamber is not easy to acquire, and therefore, the application is using the variation for spraying enthalpy compressor case temperature
To control whether to heat stator winding.
The application can execute the self-heating process of spray enthalpy compressor before receiving heating open command.The tool of self-heating
Body process is：In the case where skin temperature is less than the first temperature value, the stator winding circulation of controller control spray enthalpy compressor
Predetermined current.Since predetermined current is less than the starting current of spray enthalpy compressor, so stator winding will not operate.But stator
Winding can generate heat during circulating predetermined current.
Since spray enthalpy compressor includes stator winding, oil sump, compression chamber and shell, all parts mutually close to.Cause
This, by thermal interaction, the heat that stator winding generates can be transferred to oil sump, compression chamber and shell, so that
Lubricating oil temperature in oil sump increases, so that lubricating oil viscosity reduces；Also, it can also make the refrigerant in compression chamber
Temperature increases, to gradually become gaseous refrigerant by liquid refrigerant.By the way of stator winding heating, it can solve to spray
The problem of enthalpy compressor low temperature oil starvation and low temperature hydrops.
If the function described in the present embodiment method is realized in the form of SFU software functional unit and as independent product pin
It sells or in use, can be stored in a computing device read/write memory medium.Based on this understanding, the embodiment of the present application
The part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products, this is soft
Part product is stored in a storage medium, including some instructions are used so that computing device (can be personal computer,
Server, mobile computing device or network equipment etc.) execute all or part of step of each embodiment the method for the application
Suddenly.And storage medium above-mentioned includes：USB flash disk, read-only memory (ROM, Read-Only Memory), is deposited mobile hard disk at random
The various media that can store program code such as access to memory (RAM, Random Access Memory), magnetic disc or CD.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, just to refer each other for same or similar part between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the application.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (6)
1. a kind of control method of air-conditioning system, which is characterized in that it is applied to the controller of air-conditioning system, the method includes：
Before receiving heating open command, described in the temperature sensor continuous collecting on spray enthalpy compressor case
Spray the skin temperature of enthalpy compressor；
In the case where the skin temperature is less than the first temperature value, the stator winding conveying into the spray enthalpy compressor is default
Electric current；Wherein, the predetermined current is less than the starting current of the spray enthalpy compressor；
In the case where the skin temperature is more than second temperature value, stop the stator winding conveying into the spray enthalpy compressor
The predetermined current；
Wherein, first temperature value is less than the second temperature value；
After receiving heating open command, the method further includes：
It controls the air-conditioning system and carries out pre-heat phase；
When meeting preset condition, controls the air-conditioning system and enter the heating period；
Wherein, the control air-conditioning system progress pre-heat phase includes：
The spray enthalpy compressor is controlled to work with predeterminated frequency；Wherein, the predeterminated frequency is less than four-way in the air-conditioning system
The commutating frequency of valve；
During the spray enthalpy compressor is worked with the predeterminated frequency, using mounted on the spray enthalpy compressor exhaust pipe
On first pressure sensor, detect it is described spray enthalpy compressor pressure at expulsion；
In the case where the pressure at expulsion is less than the first preset pressure value, using controlling, low temperature valve was closed, increasing enthalpy valve is opened
Mode controls refrigerant the first loop of circulation in the spray enthalpy compressor；
In the case where the pressure at expulsion is more than the second preset pressure value, using controlling, low temperature valve was opened, increasing enthalpy valve is closed
Mode controls refrigerant the second loop of circulation in the spray enthalpy compressor；Second preset pressure value is more than described first
Preset pressure value；
Wherein, first loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and increasing enthalpy valve group
At；Second loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and gas-liquid separator group
At.
2. the method as described in claim 1, which is characterized in that the determination process for meeting preset condition includes：
Using the second pressure sensor on the spray enthalpy compressor suction duct, the air-breathing of the spray enthalpy compressor is detected
Pressure；
When judge the pressure of inspiration(Pi) be more than first preset pressure value and it is described cross low temperature valve and open when, determine to meet and preset item
Part.
3. method as claimed in claim 2, which is characterized in that further include：
When judge the pressure of inspiration(Pi) no more than first preset pressure value or it is described cross low temperature valve and close when, determine be unsatisfactory for it is pre-
If condition.
4. a kind of control device of air-conditioning system, which is characterized in that be integrated in the controller of air-conditioning system, described device includes：
Collecting unit, for before receiving heating open command, utilizing the temperature sensing on spray enthalpy compressor case
The skin temperature of enthalpy compressor is sprayed described in device continuous collecting；
Supply unit, in the case where the skin temperature is less than the first temperature value, determining into the spray enthalpy compressor
Sub- winding conveys predetermined current；Wherein, the predetermined current is less than the starting current of the spray enthalpy compressor；
Stop unit, in the case where the skin temperature is more than second temperature value, stopping into the spray enthalpy compressor
Stator winding convey the predetermined current；
Wherein, first temperature value is less than the second temperature value；
Pre-add thermal control units, for after receiving heating open command, controlling the air-conditioning system and carrying out pre-heat phase；
Heat control unit enters the heating period for when meeting preset condition, controlling the air-conditioning system；
Wherein, the pre-add thermal control units include：
Frequency cells are controlled, are worked with predeterminated frequency for controlling the spray enthalpy compressor；Wherein, the predeterminated frequency is less than institute
State the commutating frequency of four-way valve in air-conditioning system；
First detection unit is used for during the spray enthalpy compressor is worked with the predeterminated frequency, using mounted on institute
The first pressure sensor on spray enthalpy compressor exhaust pipe is stated, the pressure at expulsion of the spray enthalpy compressor is detected；
First control unit, in the case where the pressure at expulsion is less than the first preset pressure value, using controlling low temperature valve
It closes, the mode that increasing enthalpy valve is opened, controls refrigerant the first loop of circulation in the spray enthalpy compressor；
Second control unit, in the case where the pressure at expulsion is more than the second preset pressure value, using controlling low temperature valve
It opens, the mode that increasing enthalpy valve is closed, controls refrigerant the second loop of circulation in the spray enthalpy compressor；Described second default pressure
Force value is more than first preset pressure value；
Wherein, first loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and increasing enthalpy valve group
At；Second loop is by spray enthalpy compressor, oil eliminator, four-way valve, outdoor heat exchanger, subcooler and gas-liquid separator group
At.
5. device as claimed in claim 4, which is characterized in that the heat control unit includes：
Second detection unit, for using the second pressure sensor being mounted on the spray enthalpy compressor suction duct, detecting institute
State the pressure of inspiration(Pi) of spray enthalpy compressor；
Determination unit, for when judge the pressure of inspiration(Pi) be more than first preset pressure value and it is described cross low temperature valve and open when,
Determination meets preset condition.
6. device as claimed in claim 5, which is characterized in that further include：
Nack unit, for being closed no more than first preset pressure value or the low temperature valve of crossing when the judgement pressure of inspiration(Pi)
When, determination is unsatisfactory for preset condition.
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| CN106288196B (en) * | 2016-08-17 | 2018-11-23 | 珠海格力电器股份有限公司 | A kind of air-conditioning lacks control device, control method and the air-conditioning system of refrigerant protection |
| CN108072198B (en) * | 2016-11-16 | 2020-09-18 | 艾默生环境优化技术(苏州)有限公司 | Compressor assembly, control method thereof and refrigerating/heating system |
| CN108679882B (en) * | 2018-05-18 | 2019-04-19 | 浙江国祥股份有限公司 | A kind of low-temperature air source heat pump Gas-supplying enthalpy-increasing system |
| CN109099610B (en) * | 2018-09-07 | 2021-10-08 | 青岛海信日立空调系统有限公司 | Air-supplementing enthalpy-increasing refrigerating system, air conditioner and air conditioner control method |
| CN109469971B (en) * | 2018-11-13 | 2020-01-17 | 珠海格力电器股份有限公司 | Heating control method and air conditioner control system |
| CN109682106B (en) * | 2019-02-12 | 2024-01-23 | 珠海格力电器股份有限公司 | Refrigerant circulation system for slowing down surge of compressor, control method thereof and air conditioner |
| CN110006138B (en) * | 2019-03-01 | 2022-10-25 | 青岛海尔空调电子有限公司 | Control method and control system for preventing compressor of air conditioner from liquid impact |
| CN110243062A (en) * | 2019-06-24 | 2019-09-17 | 广东志高暖通设备股份有限公司 | The heating means and air-conditioning press of air-conditioning press |
| CN110285535B (en) * | 2019-06-24 | 2020-11-17 | 珠海格力电器股份有限公司 | Enthalpy increasing control method and device for air conditioning system |
| CN113834205B (en) * | 2020-06-24 | 2022-09-27 | 广东美的制冷设备有限公司 | Control method for heating of compressor winding, air conditioner and storage medium |
| CN111928421B (en) * | 2020-08-07 | 2021-06-08 | 珠海格力电器股份有限公司 | Air-supplementing enthalpy-increasing heat pump system and early warning control method thereof |
| CN112197408B (en) * | 2020-10-13 | 2022-04-01 | 广东美的制冷设备有限公司 | Heating control method of compressor winding, air conditioner control method, system and equipment |
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