CN110500685A - The control method of air-conditioning system and air-conditioning system - Google Patents
The control method of air-conditioning system and air-conditioning system Download PDFInfo
- Publication number
- CN110500685A CN110500685A CN201910822273.7A CN201910822273A CN110500685A CN 110500685 A CN110500685 A CN 110500685A CN 201910822273 A CN201910822273 A CN 201910822273A CN 110500685 A CN110500685 A CN 110500685A
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- China
- Prior art keywords
- air
- conditioning system
- throttling unit
- pressure
- step number
- Prior art date
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Classifications
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- 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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
Abstract
The present invention relates to a kind of air-conditioning system and the control method of air-conditioning system, air-conditioning system includes compressor and orifice union, and orifice union includes at least two groups throttling unit being arranged in parallel, and at least two groups throttling unit selects a connection compressor.Above-mentioned air-conditioning system, wherein one group of throttling unit plays throttling action when air-conditioning system is run, another group of throttling unit is then in the stand-by state that no refrigerant flows through.And when playing the failure of throttling action throttling unit originally; another group of throttling unit connection compressor can be switched in time to continue to play throttling action; air-conditioning system failure is caused to be shut down to avoid failing because of throttling unit; and then the operational reliability of air-conditioning system is effectively improved, extend the service life of air-conditioning system.
Description
Technical field
The present invention relates to field of heat exchange equipment, more particularly to a kind of air-conditioning system and the control method of air-conditioning system.
Background technique
Equipment of the air-conditioning as room temperature is adjusted, the application in the production and life of people are gradually popularized, are effectively changed
It has been apt to production and living environment, has greatly improved people's lives comfort level.Air-conditioning system generally includes compressor, condenser, steaming
Send out the components such as device and restricting element, wherein restricting element has the function of reducing pressure by regulating flow, be air-conditioning system important component it
One.
And currently, the biggish air-conditioning system of cooling capacity generallys use electric expansion valve as restricting element, electric expansion valve tool
Have the advantages that control is accurate, reaction speed is fast, but need to drive simultaneously to control, in actual application, it may appear that wiring
It loosens, electric expansion valve step-out, stuck etc. cause electronic expansion valve controls to fail extremely, and then air-conditioning system is caused to control
It is abnormal, there is situations such as low-voltage variation, unit band liquid operation, ultimately causing unit can not normal reliable operation.
Summary of the invention
Based on this, it is necessary to aiming at the problem that electric expansion valve is easy failure and air-conditioning system is caused to be unable to operate normally,
A kind of air-conditioning system and air-conditioning system that can avoid causing air-conditioning system to be unable to operate normally because of the failure of electric expansion valve is provided
Control method.
A kind of air-conditioning system, the air-conditioning system include compressor and orifice union, and the orifice union is set including parallel connection
At least two groups throttling unit set, at least two groups throttling unit select the connection compressor.
Above-mentioned air-conditioning system, wherein one group of throttling unit plays throttling action when air-conditioning system is run, another group
Throttling unit is then in the stand-by state that no refrigerant flows through.And when play originally throttling action throttling unit failure when, can and
When switch another group of throttling unit connection compressor to continue to play throttling action, to avoid leading to sky because throttling unit fails
Adjusting system, which breaks down, shuts down, and then effectively improves the operational reliability of air-conditioning system, and extend air-conditioning system uses the longevity
Life.
Throttling unit described in every group includes electric expansion valve in one of the embodiments,.
Throttling unit described in every group further includes solenoid valve in one of the embodiments, and the input end of the solenoid valve connects
It is connected to the outlet end of the electric expansion valve.
The air-conditioning system further includes the pressure sensor for being installed on the compressor, institute in one of the embodiments,
Pressure sensor is stated for obtaining the low pressure and high-pressure of the air-conditioning system.
A kind of control method of air-conditioning system, the control method of the air-conditioning system the following steps are included:
Obtain running parameter when air-conditioning system operation；
Judge whether the throttling unit that compressor is connected in orifice union is in abnormal work shape according to the running parameter
State；
When judging that the throttling unit is in the abnormal operation, the air-conditioning system is closed, and described in switching
Throttling unit described in another group in orifice union is connected to the compressor.
Step is adjusted when the adjusting step number of electric expansion valve in the throttling unit reaches default in one of the embodiments,
Number, and the variable quantity of the low pressure of the air-conditioning system is less than pre-set low pressure pressure variety and/or the air-conditioning system
When the variable quantity of high-pressure is less than preset high-pressure pressure variety, judge that the throttling unit is in abnormal operation.
In one of the embodiments, it is described it is default adjust step number be the electric expansion valve total adjusting step number ±
10%.
Start in the time when the starting time of the compressor default in one of the embodiments, the air-conditioning system
When the low pressure of system is less than low-voltage variation pressure, judge that the throttling unit is in abnormal operating state.
It is greater than default increase when the aperture of electric expansion valve in the throttling unit increases step number in one of the embodiments,
Big step number, and when the low pressure decline of the air-conditioning system and/or the high-pressure of the air-conditioning system rise, described in judgement
Throttling unit is in abnormal operating state.
The default increase step number is the 5% of the total step number of the electric expansion valve in one of the embodiments,.
It is greater than default subtract when the aperture of electric expansion valve in the throttling unit reduces step number in one of the embodiments,
Small step number, and the low pressure of the air-conditioning system rises and/or when the decline of the high-pressure of the air-conditioning system, described in judgement
Throttling unit is in abnormal operating state.
The default reduction step number is the 5% of the total step number of the electric expansion valve in one of the embodiments,.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the air-conditioning system of one embodiment of the invention；
Fig. 2 is the control method flow chart of air-conditioning system shown in Fig. 1.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
As shown in Figure 1, the air-conditioning system 100 of one embodiment of the invention, including compressor 10, oil eliminator 20, condensation
Device 30, device for drying and filtering 40, orifice union 50, evaporator 60 and control device (not shown), compressor 10, oil eliminator
20, condenser 30, device for drying and filtering 40, orifice union 50 and evaporator 60 are sequentially connected by pipeline to be formed and be exchanged heat back
Road, refrigerant can be constantly recycled in heat-exchanging loop to realize that heat exchanges, to adjust the temperature of indoor environment.Control device can
Respectively with the components such as compressor 10, oil eliminator 20, condenser 30, device for drying and filtering 40, orifice union 50 and evaporator 60
Communication connection is to control the working condition of these components and obtain the running parameters of these components simultaneously.
Specifically, under control of the control means, the gaseous coolant of the exhaust end output high temperature and pressure of compressor 10, high temperature
The gaseous coolant of high pressure enters in oil eliminator 20, and the lubricating oil carried in refrigerant comes back to by the separation of oil eliminator 20
In compressor 10, the gaseous coolant of high temperature and pressure then enters exothermic condensation in condenser 30, forms the liquid refrigerants of normal temperature high voltage.
The liquid refrigerants of the normal temperature high voltage flowed out in condenser 30 is after the moisture that device for drying and filtering 40 absorbs in refrigerant, by throttling
Component 50, which throttles, becomes the liquid refrigerants of low-temp low-pressure, and the liquid refrigerants of the low-temp low-pressure flowed out from orifice union 50 enters steaming
Device 60 is sent out, absorbs the heat in indoor environment in evaporator 60 to be evaporated to the gaseous coolant of high-temperature low-pressure, high-temperature low-pressure gas
The refrigerant of state is finally reserved from evaporator 60, is come back in compressor 10 and is compressed by the suction end of compressor 10.It is above-mentioned
Process of refrigerastion constantly recycles, so as to reduce the temperature of indoor environment.
Wherein, orifice union 50 includes at least two groups throttling unit 52 being arranged in parallel, and at least two groups throttling unit 52 is selected
One connection compressor 10.In this way, from the controllable wherein one group of throttling unit 52 of control device is when air-conditioning system 100 is run
To throttling action, another group of throttling unit 52 is then in stand-by state.When the throttling unit 52 for playing throttling action originally fails
When, control device can switch another group of throttling unit 52 in time and be connected to compressor 10 to continue to play throttling action, to avoid
It is shut down because the failure of throttling unit 52 causes air-conditioning system 100 to break down.
In the following embodiments, orifice union 50 includes two groups of throttling units 52 being arranged in parallel.It is appreciated that other
In some embodiments, orifice union 50 may also comprise three groups be arranged in parallel, four groups of even more multiple groups throttling units 52, thus into
The reliability of one step raising orifice union 50.
Specifically, every group of throttling unit 52 includes concatenated electric expansion valve 521 and solenoid valve 523, and control device can
Control the opening size of electric expansion valve 521 and the opening and closing of solenoid valve 523.The electric expansion valve 521 of every group of throttling unit 52
Input end is parallel to the outlet end of device for drying and filtering 40, the outlet end of the electric expansion valve 521 in every group of throttling unit 52 with should
The input end of solenoid valve 523 in group is connected to by pipeline, and the outlet end of the solenoid valve 523 of every group of throttling unit 52 is parallel to steaming
Send out the input end of device 60.Since electric expansion valve 521 may be set in throttling unit 52 due to failing to completely close
There is solenoid valve 523, solenoid valve 523 can be at completely closed state to guarantee that refrigerant can not pass through.It is appreciated that throttling unit 52
Specific configuration it is without being limited thereto, electric expansion valve 521 can also be replaced with solenoid valve 523 by other types of valve.
In this way, when wherein the electric expansion valve 521 of one group of throttling unit 52 is in solenoid valve 523 for control device control
When open state, device for drying and filtering 40 is connected to by this group of throttling unit 52 with evaporator 60, and device for drying and filtering 40 flows out cold
Matchmaker enters evaporator 60 after throttling by this group of throttling unit 52.At the same time, control device controls another group of throttling unit 52
Electric expansion valve 521 and solenoid valve 523 be in closed state, therefore this group of throttling unit 52 is flowed through without refrigerant.And work as
When electric expansion valve 521 in the open state breaks down and fails, the electric expansion valve 521 of control device control failure and
Solenoid valve 523 connected to it closes and refrigerant is prevented to flow through, and then controls the electric expansion valve 521 of another group of throttling unit 52
Open state is switched to continue to play throttling action by closed state with solenoid valve 523.
In some embodiments, air-conditioning system 100 further include be installed on compressor 10 two groups of pressure sensors (figure not
Show), two groups of pressure sensors are communicated to connect with control device.Wherein one group of pressure sensor is installed on air-conditioning system 100
Suction end, for obtaining the low pressure (i.e. the pressure of inspiration(Pi) of compressor 10) of air-conditioning system 100, another group of pressure sensor peace
Exhaust end loaded on air-conditioning system 100, for obtaining the high-pressure (i.e. the pressure at expulsion of compressor 10) of air-conditioning system 100.
In this way, whether control device can judge electric expansion valve 521 in different according to the low pressure of air-conditioning system 100 with high-pressure
Normal working condition.
As shown in Figures 1 and 2, a kind of air-conditioning system 100 of the embodiment of the present invention control method the following steps are included:
S110: running parameter when air-conditioning system 100 is run is obtained.
Specifically, control device can obtain low pressure, high-pressure and the electronics when air-conditioning system 100 is run in real time
The working condition of expansion valve 521.
S120: judge the throttling unit 52 for being connected to compressor 10 in orifice union 50 whether in abnormal according to running parameter
Working condition.
In some embodiments, step number is adjusted when the adjusting step number of electric expansion valve 521 in throttling unit 52 reaches default,
And the variable quantity of the low pressure of air-conditioning system 100 is less than pre-set low pressure pressure variety and/or the variable quantity of high-pressure is small
When preset high-pressure pressure variety, shows that electric expansion valve 521 is in stuck state, decrease or increase electric expansion valve 521
Step number can not effectively change the flow of refrigerant, therefore control device judges that throttling unit 52 is in abnormal operation.It is excellent
Choosing, it presets and adjusts ± the 10% of total adjusting step number that step number is electric expansion valve 521.It is appreciated that default adjust step number not
It is limited to this, different step numbers can be selected as needed.
In some embodiments, start in the time when the starting time of compressor 10 default, the low pressure of air-conditioning system 100
When pressure is less than low-voltage variation pressure, electric expansion valve 521 can not be normally-open at this time, and refrigerant can not be returned by throttling unit 52
Into compressor 10, compressor 10 is shut down because of low-voltage variation failure, therefore control device judges that throttling unit 52 is in abnormal
Working condition.Preferably, presetting the starting time is two minutes.It is appreciated that the default starting time is without being limited thereto, it can be as needed
Different durations are set.
In some embodiments, when the aperture variation of electric expansion valve 521 in throttling unit 52 leads to low pressure and height
When pressure pressure changes toward opposite direction, show that the problem of failure of adjustment (adjusting disorder) occurs in electric expansion valve 521, therefore control
Device judges that throttling unit 52 is in abnormal operation.
Specifically, it is greater than default reduction step number when the aperture of electric expansion valve 521 in throttling unit 52 reduces step number, flows through
The flow of the refrigerant of electric expansion valve 521 reduces, therefore when electric expansion valve 521 is in normal operating conditions, air-conditioning system
100 low pressure should decline, and high-pressure should increase.And when the rising of the low pressure of air-conditioning system 100 and/or high pressure
When pressure declines, show that the problem of failure of adjustment occurs in electric expansion valve 521, therefore control device judges that throttling unit 52 is in
Abnormal operation.
It is greater than default increase step number when the aperture of electric expansion valve 521 in throttling unit 52 increases step number, it is swollen flows through electronics
The flow of the refrigerant of swollen valve 521 increases, therefore when electric expansion valve 521 is in normal operating conditions, air-conditioning system 100 it is low
Pressure pressure increases, high-pressure decline.And when the decline of the low pressure of air-conditioning system 100 and/or high-pressure rise, show
There is the problem of failure of adjustment in electric expansion valve 521, therefore control device judges that throttling unit 52 is in abnormal operating state.
Preferably, it presets and increases the 5% of the total step number that step number is electric expansion valve 521, presetting reduction step number is that electronics is swollen
The 5% of the total step number of swollen valve 521.It is appreciated that the default specific value for increasing step number and presetting reduction step number is constant, it can basis
It needs to be arranged.
S130: when judging that throttling unit 52 is in abnormal operation, air-conditioning system 100 is closed, and switch throttling group
Another group of throttling unit 52 in part 50 is connected to compressor 10.
Specifically, when control device judges that throttling unit 52 is in abnormal work, control device closes air-conditioning system 100
And air-conditioning system 100 is avoided because of disorderly closedown, it is then shut off the electric expansion valve of the throttling unit 52 in abnormal operation
521 with solenoid valve 523, open later spare another throttling unit 52 electric expansion valve 521 and solenoid valve 523, finally weigh
New to open air-conditioning system 100, refrigerant is flowed through from spare throttling unit 52, and air-conditioning system 100 is restored to operate normally.
The control method of above-mentioned air-conditioning system 100 and air-conditioning system 100, by detection 100 operational process of air-conditioning system
The variation of running parameter judge whether electric expansion valve 521 works normally, when electric expansion valve 521 is in abnormal operation
When, the automatic switchover of electric expansion valve 521 can be realized in time, guarantee 100 failure-free operation of air-conditioning system.In this way, above-mentioned air-conditioning
System 100 by the way of Redundancy Design, realizes 521 a preparation and a use of electric expansion valve, effectively mentions for orifice union 50
The operational reliability for having risen air-conditioning system 100 extends the service life of air-conditioning system 100, makes air-conditioning system 100 that can for a long time may be used
By operation.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (12)
1. a kind of air-conditioning system, which is characterized in that the air-conditioning system includes compressor (10) and orifice union (50), the section
Flowing component (50) includes at least two groups throttling unit (52) being arranged in parallel, and at least two groups throttling unit (52) selects a connection
The compressor (10).
2. air-conditioning system according to claim 1, which is characterized in that throttling unit described in every group (52) includes that electronics is swollen
Swollen valve (521).
3. air-conditioning system according to claim 2, which is characterized in that throttling unit described in every group (52) further includes solenoid valve
(523), the input end of the solenoid valve (523) is connected to the outlet end of the electric expansion valve (521).
4. air-conditioning system according to claim 2, which is characterized in that the air-conditioning system further includes being installed on the compression
The pressure sensor of machine (10), the pressure sensor are used to obtain the low pressure and high-pressure of the air-conditioning system.
5. a kind of control method of air-conditioning system, which is characterized in that the control method of the air-conditioning system the following steps are included:
Obtain running parameter when air-conditioning system operation；
Judge the throttling unit (52) of connection compressor (10) in orifice union (50) whether in different according to the running parameter
Normal working condition；
When judging that the throttling unit (52) is in the abnormal operation, the air-conditioning system is closed, and described in switching
Throttling unit (52) described in another group in orifice union (50) is connected to the compressor (10).
6. the control method of air-conditioning system according to claim 5, which is characterized in that when electric in the throttling unit (52)
The adjusting step number of sub- expansion valve (521) reaches default and adjusts step number, and the variable quantity of the low pressure of the air-conditioning system is less than
The variable quantity of the high-pressure of pre-set low pressure pressure variety and/or the air-conditioning system is less than preset high-pressure pressure variety
When, judge that the throttling unit (52) is in abnormal operation.
7. the control method of air-conditioning system according to claim 6, which is characterized in that the default adjusting step number is described
± the 10% of total adjusting step number of electric expansion valve (521).
8. the control method of air-conditioning system according to claim 5, which is characterized in that when the starting of the compressor (10)
Time within the default starting time, when the low pressure of the air-conditioning system is less than low-voltage variation pressure, judges that the throttling is single
First (52) are in abnormal operating state.
9. the control method of air-conditioning system according to claim 5, which is characterized in that when electric in the throttling unit (52)
The aperture of sub- expansion valve (521) increase step number be greater than it is default increase step number, and the low pressure decline of the air-conditioning system and/or
When the high-pressure of the air-conditioning system rises, judge that the throttling unit (52) is in abnormal operating state.
10. the control method of air-conditioning system according to claim 9, which is characterized in that the default increase step number is institute
State the 5% of the total step number of electric expansion valve (521).
11. the control method of air-conditioning system according to claim 5, which is characterized in that when in the throttling unit (52)
The aperture of electric expansion valve (521) reduce step number be greater than it is default reduce step number, and the low pressure of the air-conditioning system rise and/
Or the air-conditioning system high-pressure decline when, judge that the throttling unit (52) is in abnormal operating state.
12. the control method of air-conditioning system according to claim 11, which is characterized in that the default reduction step number is institute
State the 5% of the total step number of electric expansion valve (521).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822273.7A CN110500685B (en) | 2019-09-02 | 2019-09-02 | Air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822273.7A CN110500685B (en) | 2019-09-02 | 2019-09-02 | Air conditioning system and control method thereof |
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| Publication Number | Publication Date |
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| CN110500685A true CN110500685A (en) | 2019-11-26 |
| CN110500685B CN110500685B (en) | 2020-09-15 |
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ID=68590993
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| CN111412684A (en) * | 2020-04-20 | 2020-07-14 | 珠海格力电器股份有限公司 | Throttling element failure control method and air conditioner |
| CN113660831A (en) * | 2021-08-06 | 2021-11-16 | 珠海格力电器股份有限公司 | Heat dissipation system, air conditioning unit and air conditioning unit control method |
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| CN113660831A (en) * | 2021-08-06 | 2021-11-16 | 珠海格力电器股份有限公司 | Heat dissipation system, air conditioning unit and air conditioning unit control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110500685B (en) | 2020-09-15 |
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