CN104613615B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
- Publication number
- CN104613615B CN104613615B CN201510057112.5A CN201510057112A CN104613615B CN 104613615 B CN104613615 B CN 104613615B CN 201510057112 A CN201510057112 A CN 201510057112A CN 104613615 B CN104613615 B CN 104613615B
- Authority
- CN
- China
- Prior art keywords
- regulating valve
- exhaust temperature
- aperture
- compressor
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 177
- 239000003507 refrigerant Substances 0.000 claims abstract description 29
- 230000001276 controlling effect Effects 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims description 14
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract 2
- 239000002826 coolant Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000003434 inspiratory effect Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000010725 compressor oil Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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
- F24F11/62—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
-
- 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
- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a control method thereof. Wherein, the air conditioner includes: parallelly connected first compressor and the second compressor that sets up, the air conditioner still includes first breathing pipe and the first blast pipe of connection on first compressor and connect second breathing pipe and the second blast pipe on the second compressor, and the air conditioner still includes: the first temperature sensor is arranged on the first exhaust pipe and used for acquiring a first exhaust temperature of the first compressor; the second temperature sensor is arranged on the second exhaust pipe and used for acquiring a second exhaust temperature of the second compressor; the first regulating valve is used for controlling the refrigerant suction quantity of the first compressor; and the second regulating valve is used for controlling the refrigerant suction quantity of the second compressor, and the opening degree of the first regulating valve and/or the second regulating valve is determined by the difference value of the first exhaust temperature and the second exhaust temperature. The technical scheme of the invention effectively solves the problem that the refrigerant suction volume of each compressor in the parallel compressor set of the air conditioner in the prior art is difficult to control.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of air-conditioner and its control method.
Background technology
In light-duty business air conditioner unit, consider due to the self character of screw compressor and using scope, 10
And the compressor of 12 it is the most commonly used, cost performance highest.Therefore when compressor set requirement refrigerating capacity reach 60,70 very
To it is bigger when, in order to do not make system quantity excessively cause control component number it is huge, generally individual system can all be adopted
With 2 10 or the compressor parallel of 12.However, can be gone out while cost performance is improved using parallel compressor unit
Existing unit is too high, too low in pressure ratio or cooling medium charging is bigger than normal.Cooling medium charging is bigger than normal easily to cause inspiratory capacity between parallel connection compressor
, so as to the compressor oil temperature for causing inspiratory capacity big is relatively low, and then there is compressor oil lubrication not in the excessive unbalanced phenomena of deviation
The unstable phenomenon of good and system, the reliable of influence compressor uses and the life-span.
Regarding to the issue above, the pipeline runner in the prior art to two compressors carries out impedance match operation, to ensure
Two inspiratory capacities of parallel connection compressor are balanced.But after parallel compressor unit works a period of time, the parameters of unit occur
Change, it is difficult to ensure that the pipe resistance of parallel connection compressor is consistent, therefore the refrigerant soakage of two compressors is difficult to control to.
The content of the invention
It is a primary object of the present invention to provide a kind of air-conditioner and its control method, to solve air-conditioner in the prior art
Parallel compressor unit in each unmanageable problem of compressor refrigerant soakage.
To achieve these goals, according to an aspect of the invention, there is provided a kind of air-conditioner, including：It is arranged in parallel
The first compressor and the second compressor, air-conditioner also includes being connected to the first air intake duct and first exhaust on the first compressor
The second air intake duct and the second exhaust pipe on the second compressor are managed and are connected to, air-conditioner also includes：First temperature sensor,
It is arranged on downtake pipe and for the first exhaust temperature of the first compressor of acquisition；Second temperature sensor, is arranged on
On two blast pipes and for the second exhaust temperature of the second compressor of acquisition；First regulating valve, is arranged on the first air intake duct, the
One regulating valve is used to control the refrigerant soakage of the first compressor；Second regulating valve, is arranged on the second air intake duct, the second regulation
Valve is used to control the refrigerant soakage of the second compressor, wherein, the aperture of the first regulating valve and/or the second regulating valve passes through first
The difference of delivery temperature and second exhaust temperature determines.
Further, air-conditioner also includes controller, the first temperature sensor, second temperature sensor, the first regulating valve
And second regulating valve be connected with controller.
According to another aspect of the present invention, there is provided a kind of control method of air-conditioner, air-conditioner is above-mentioned air-conditioner,
Control method includes：The first exhaust temperature of downtake pipe is obtained, the second exhaust temperature of second exhaust pipe is obtained；By
The difference of one delivery temperature and second exhaust temperature controls the aperture of the first regulating valve and/or the second regulating valve.
Further, the first regulating valve and/or second are controlled by the difference of first exhaust temperature and second exhaust temperature
The step of aperture of regulating valve, includes：When first exhaust temperature is more than second exhaust temperature, and first exhaust temperature and second
When the difference of delivery temperature is more than the first preset value, maintain the aperture of the first regulating valve constant, reduce the aperture of the second regulating valve；
When first exhaust temperature is less than second exhaust temperature, and first exhaust temperature is pre- less than second with the difference of second exhaust temperature
If during value, maintaining the aperture of the second regulating valve constant, reduce the aperture of the first regulating valve；When first exhaust temperature and second exhaust
When the difference of temperature is between the first preset value and the second preset value, the aperture of the first regulating valve and the second regulating valve is maintained not
Become.
Further, the first regulating valve and/or second are controlled by the difference of first exhaust temperature and second exhaust temperature
The step of aperture of regulating valve, includes：When first exhaust temperature is more than second exhaust temperature, and first exhaust temperature and second row
When the difference of temperature degree is more than the first preset value, maintain the aperture of the second regulating valve constant, increase the aperture of the first regulating valve；When
First exhaust temperature is less than second exhaust temperature, and first exhaust temperature is less than the second preset value with the difference of second exhaust temperature
When, maintain the aperture of the first regulating valve constant, increase the aperture of the second regulating valve；When first exhaust temperature and second exhaust temperature
Difference between the first preset value and the second preset value when, maintain the aperture of the first regulating valve and the second regulating valve constant.
Further, the first regulating valve and/or second are controlled by the difference of first exhaust temperature and second exhaust temperature
The step of aperture of regulating valve, includes：When first exhaust temperature is more than second exhaust temperature, and first exhaust temperature and second row
When the difference of temperature degree is more than the first preset value, the aperture of the second regulating valve is reduced while the aperture for increasing by the first regulating valve；
When first exhaust temperature is less than second exhaust temperature, and first exhaust temperature is preset with the difference of second exhaust temperature less than second
During value, the aperture of the first regulating valve is reduced while the aperture for increasing by the second regulating valve；When first exhaust temperature and second exhaust
When the difference of temperature is between the first preset value and the second preset value, the aperture of the first regulating valve and the second regulating valve is maintained not
Become.
Further, the first preset value is 5 DEG C, and the second preset value is -5 DEG C.
Further, in the step of reducing the aperture of the second regulating valve, the percentage of the reduction of the aperture of the second regulating valve
It is obtained by the following formula：A=((T1-T2The % of)/5)；Wherein, A is the percentage of the reduction of the aperture of the second regulating valve, and T1 is
One delivery temperature, T2 is second exhaust temperature.
Further, in the step of reducing the aperture of the first regulating valve, the percentage of the reduction of the aperture of the first regulating valve
It is obtained by the following formula：B=((T2-T1The % of)/5)；Wherein, B is the percentage of the reduction of the aperture of the first regulating valve, and T2 is
Two delivery temperatures, T1 is first exhaust temperature.
Further, obtain downtake pipe first exhaust temperature, obtain second exhaust pipe second exhaust temperature it
It is preceding further comprising the steps of：Close the first regulating valve and the second regulating valve；The first regulating valve and the second regulating valve are opened, and is made
First regulating valve and the second regulating valve have identical aperture；The first compressor and the second compressor are opened simultaneously.
Further, the step of making the first regulating valve and the second regulating valve have identical aperture includes：Make the first regulation
Valve and the second regulating valve are opened to maximum opening.
Apply the technical scheme of the present invention, first is set on first air intake duct and downtake pipe of the first compressor and is adjusted
Section valve and the first temperature sensor, set the second regulating valve and the on second air intake duct and second exhaust pipe of the second compressor
Two temperature sensors.In the first compressor and the second compressor operating, the first compressor is obtained by the first temperature sensor
First exhaust temperature, by second temperature sensor obtain the second compressor second exhaust temperature.By first row temperature
Whether degree is consistent to judge the refrigerant soakage of the first compressor and the second compressor with the difference of second exhaust temperature, and then adjusts
Whole first regulating valve ensures that the resistance of the first air intake duct and the second air intake duct is consistent with the aperture of the second regulating valve, it is ensured that first
The refrigerant soakage of compressor and the second compressor is balanced.Therefore technical scheme can solve air-conditioning in the prior art
Each compressor refrigerant soakage is difficult to control to problem in the parallel compressor unit of device.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, of the invention to show
Meaning property and its illustrates, for explaining the present invention, not constitute inappropriate limitation of the present invention embodiment.In the accompanying drawings：
Fig. 1 shows the structural representation of the embodiment one of air-conditioner of the invention；
Fig. 2 shows the schematic flow sheet of the embodiment one of the control method of air-conditioner of the invention；
Fig. 3 shows the schematic flow sheet of the embodiment two of the control method of air-conditioner of the invention；And
Fig. 4 shows the schematic flow sheet of the embodiment three of the control method of air-conditioner of the invention.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
10th, the first compressor；11st, the first air intake duct；12nd, downtake pipe；13rd, the first temperature sensor；14th, first adjust
Section valve；20th, the second compressor；21st, the second air intake duct；22nd, second exhaust pipe；23rd, second temperature sensor；24th, the second regulation
Valve；30th, controller.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figure 1, the air-conditioner of embodiment one includes the first compressor 10 and the second compressor 20 that are arranged in parallel.It is empty
Adjusting device also includes the first air intake duct 11 being connected on the first compressor 10 and downtake pipe 12 and is connected to the second compression
The second air intake duct 21 and second exhaust pipe 22 on machine 20.Air-conditioner also include the first temperature sensor 13, the first regulating valve 14,
The regulating valve 24 of second temperature sensor 23 and second.First temperature sensor 13 is arranged on downtake pipe 12 and for obtaining
The first exhaust temperature of the first compressor 10.Second temperature sensor 23 is arranged on second exhaust pipe 22 and for obtaining second
The second exhaust temperature of compressor 20.First regulating valve 14 is arranged on the first air intake duct 11 and for controlling the first compressor 10
Refrigerant soakage.Second regulating valve 24 is arranged on the second air intake duct 21 and for controlling the refrigerant of the second compressor 20 to suck
Amount.Wherein, the aperture of the first regulating valve 14 and/or the second regulating valve 24 is by first exhaust temperature and the difference of second exhaust temperature
Value determines.
Using the technical scheme of the present embodiment, set on first air intake duct 11 and downtake pipe 12 of the first compressor 10
The first regulating valve 14 and the first temperature sensor 13 are put, on second air intake duct 21 and second exhaust pipe 22 of the second compressor 20
Second regulating valve 24 and second temperature sensor 23 are set.When the first compressor 10 and the second compressor 20 work, by the
One temperature sensor 13 obtains the first exhaust temperature of the first compressor 10, and obtaining second by second temperature sensor 23 compresses
The second exhaust temperature of machine 20.The first compressor 10 and are judged by the difference of first exhaust temperature and second exhaust temperature
Whether the refrigerant soakage of two compressors 20 is consistent, and then adjusts the aperture of the first regulating valve 14 and the second regulating valve 24 and ensure
First air intake duct 11 is consistent with the resistance of the second air intake duct 21, it is ensured that the refrigerant suction of the first compressor 10 and the second compressor 20
Amount is balanced.Therefore each compressor is cold during technical scheme can solve the parallel compressor unit of air-conditioner in the prior art
Matchmaker's soakage is difficult to control to problem.
As shown in figure 1, in the technical scheme of the present embodiment, air-conditioner also includes controller 30, the first temperature sensor
13rd, second temperature sensor 23, the first regulating valve 14 and the second regulating valve 24 are connected with controller 30.Controller 30 passes through
First temperature sensor 13 obtains first exhaust temperature, and second exhaust temperature is obtained by second temperature sensor 23.Controller
30 apertures that can control the first regulating valve 14 and the second regulating valve 24.
Present invention also provides a kind of control method of air-conditioner, air-conditioner is above-mentioned air-conditioner.As shown in Fig. 2 real
The control method for applying example one includes：The first exhaust temperature of downtake pipe 12 is obtained, the second row of second exhaust pipe 22 is obtained
Temperature degree；First regulating valve 14 and/or the second regulating valve 24 are controlled by the difference of first exhaust temperature and second exhaust temperature
Aperture.
Using the technical scheme of the present embodiment, first is judged by the difference of first exhaust temperature and second exhaust temperature
Whether compressor 10 is consistent with the refrigerant soakage of the second compressor 20, and then adjusts the first regulating valve 14 and the second regulating valve 24
Aperture it is consistent with the resistance of the second air intake duct 21 to ensure the first air intake duct 11, it is ensured that the first compressor 10 and the second compressor
20 refrigerant soakage is balanced.Therefore technical scheme can solve the parallel compressor unit of air-conditioner in the prior art
In each compressor refrigerant soakage be difficult to control to problem.
As shown in Fig. 2 in the technical scheme of the present embodiment, by first exhaust temperature and the difference of second exhaust temperature
The step of aperture for controlling the first regulating valve 14 and/or the second regulating valve 24, includes：
When first exhaust temperature is more than second exhaust temperature, and first exhaust temperature is big with the difference of second exhaust temperature
When the first preset value, maintain the aperture of the first regulating valve 14 constant, reduce the aperture of the second regulating valve 24.Specifically, when
One delivery temperature be more than second exhaust temperature when, and first exhaust temperature be more than second exhaust temperature certain numerical value when, explanation
The suction coolant quantity of second compressor 20 is excessive, causes delivery temperature low.The suction coolant quantity of second compressor 20 can excessively cause the
The oil temperature of two compressor 20 is too low, causes the insufficient lubrication of the second compressor 20, influences the job stability of the second compressor 20 and sets
The standby life-span.Now need to reduce the aperture of the second regulating valve 24, and then increase the resistance of ducting of the second air intake duct 21, so as to reduce the
The refrigerant soakage of two compressors 20, it is ensured that the normal work of the second compressor.
Preferably, the percentage of the reduction of the aperture of the second regulating valve 24 is obtained by the following formula：
Formula one：A=((T1-T2)/5) %；
Wherein, A is the percentage of the reduction of the aperture of the second regulating valve 24, and T1 is first exhaust temperature, and T2 is second row
Temperature degree.Certainly, the decreasing value of the aperture of the second regulating valve 24 is not limited to be obtained using formula one, can use other modes
Obtain.
When first exhaust temperature is less than second exhaust temperature, and first exhaust temperature is small with the difference of second exhaust temperature
When the second preset value, maintain the aperture of the second regulating valve 24 constant, reduce the aperture of the first regulating valve 14.Specifically, when
One delivery temperature be less than second exhaust temperature when, and first exhaust temperature be less than second exhaust temperature certain numerical value when, explanation
The suction coolant quantity of first compressor 10 is excessive, causes delivery temperature low.The suction coolant quantity of first compressor 10 can excessively cause the
The oil temperature of one compressor 10 is too low, causes the insufficient lubrication of the first compressor 10, influences the job stability of the first compressor 10 and sets
The standby life-span.Now need to reduce the aperture of the first regulating valve 14, and then increase the resistance of ducting of the first air intake duct 11, so as to reduce the
The refrigerant soakage of one compressor 10, it is ensured that the normal work of the first compressor.
Preferably, the percentage of the reduction of the aperture of the first regulating valve 14 is obtained by the following formula：
Formula two：B=((T2-T1)/5) %；
Wherein, B is the percentage of the reduction of the aperture of the second regulating valve 24, and T2 is second exhaust temperature, and T1 is first row
Temperature degree.Certainly, the decreasing value of the aperture of the second regulating valve 24 is not limited to be obtained using formula one, can use other modes
Obtain.
When the difference of first exhaust temperature and second exhaust temperature is between the first preset value and the second preset value, maintain
The aperture of the first regulating valve 14 and the second regulating valve 24 is constant.Specifically, the first preset value is 5 DEG C, and the second preset value is -5 DEG C.
When the difference of first exhaust temperature and second exhaust temperature is in the range of -5 to 5 DEG C, it is believed that the first compressor 10 and second
Compressor 20 is working properly, and the aperture of the first regulating valve 14 and the second regulating valve 24 does not make any adjustments.Certain first preset value
Concrete numerical value with the second preset value is not limited, and can be adjusted according to equipment situation and being actually needed,
As shown in Fig. 2 in the technical scheme of the present embodiment, in order to ensure the first regulating valve 14 and the energy of the second regulating valve 24
Enough normal works, therefore, the first exhaust temperature of downtake pipe 12 is obtained, obtain the second exhaust temperature of second exhaust pipe 22
It is before further comprising the steps of：
The first regulating valve 14 and the second regulating valve 24 are first closed, in opening the first regulating valve 14 and the second regulating valve 24, and
And making the first regulating valve 14 and the second regulating valve 24 that there is identical aperture, aforesaid operations ensure in the first compressor 10 and second
The regulating valve 24 of preceding first regulating valve 14 and second that works of compressor 20 is not stuck.
After confirming the first regulating valve 14 and the second regulating valve 24 without failure, while opening the first compressor 10 and the
Two compressors 20.
Preferably, in order to ensure the first compressor 10 and the second compressor 20 the first air intake duct 11 and the when starting working
Resistance in two air intake ducts 21 is small as far as possible, the first regulating valve 14 and the second regulating valve 24 is had the step of identical aperture
In rapid, the first regulating valve 14 and the second regulating valve 24 are opened to maximum opening.
Embodiment two is with the difference of embodiment one, when the difference of first exhaust temperature and second exhaust temperature is not the
When in the range of one preset value and the second preset value, the first regulating valve 14 is different with the control mode of the second regulating valve 24, such as Fig. 3
It is shown：
When first exhaust temperature is more than second exhaust temperature, and first exhaust temperature is more than with the difference of second exhaust temperature
During the first preset value, maintain the aperture of the second regulating valve 24 constant, increase the aperture of the first regulating valve 14.Specifically, the is increased
The aperture of one regulating valve 14 can reduce the resistance in the first air intake duct 11.Because the first compressor 10 and the second compressor 20 are
It is arranged in parallel, therefore in the case that resistance in the second air intake duct 21 is constant, refrigerant can more flow into the less suction of resistance
Tracheal strips.Therefore, maintain the aperture of the second regulating valve 24 constant, the aperture for increasing by the first regulating valve 14 can reach reduction second
The effect of the refrigerant soakage of compressor.
When first exhaust temperature is less than second exhaust temperature, and first exhaust temperature is less than with the difference of second exhaust temperature
During the second preset value, maintain the aperture of the first regulating valve 14 constant, increase the aperture of the second regulating valve 24.Specifically, the is increased
The aperture of two regulating valves 24 can reduce the resistance in the second air intake duct 21.Because the first compressor 10 and the second compressor 20 are
It is arranged in parallel, therefore in the case that resistance in the first air intake duct 11 is constant, refrigerant can more flow into the less suction of resistance
Tracheal strips.Therefore, maintain the aperture of the first regulating valve 14 constant, the aperture for increasing by the second regulating valve 24 can reach reduction first
The effect of the refrigerant soakage of compressor.
In embodiment two, when the difference of first exhaust temperature and second exhaust temperature is more than the first preset value, or and
The difference of first exhaust temperature and second exhaust temperature is when being less than the second preset value to the first compressor 10 and the second compressor 20
Influence and embodiment one it is identical, will not be repeated here.
Embodiment three is with the difference of other embodiment, when the difference of first exhaust temperature and second exhaust temperature does not exist
When in the range of the first preset value and the second preset value, the first regulating valve 14 is different with the control mode of the second regulating valve 24, such as
Shown in Fig. 4：
When first exhaust temperature is more than second exhaust temperature, and first exhaust temperature is more than with the difference of second exhaust temperature
During the first preset value, the aperture of the second regulating valve 24, specifically, above-mentioned behaviour are reduced while the aperture for increasing by the first regulating valve 14
Make to cause to increase the resistance in the second air intake duct 21 while the resistance in the first air intake duct 11 is reduced.Due to the first compressor
10 and second compressor 20 to be arranged in parallel, therefore resistance in the first air intake duct 11 reduces and the resistance in the second air intake duct 21
In the case that power increases, refrigerant can be flowed into more in the less air intake duct of resistance.Therefore, the aperture of the first regulating valve 14 is increased
While reduce the second regulating valve 24 aperture can reach reduce the first compressor refrigerant soakage effect.
When first exhaust temperature is less than second exhaust temperature, and first exhaust temperature is less than with the difference of second exhaust temperature
During the second preset value, the aperture of the first regulating valve 14 is reduced while the aperture for increasing by the second regulating valve 24.Specifically, above-mentioned behaviour
Make to cause to reduce the resistance in the second air intake duct 21 while the resistance in the first air intake duct 11 is increased.Due to the first compressor
10 and second compressor 20 to be arranged in parallel, therefore the resistance increase in the first air intake duct 11 and the resistance in the second air intake duct 21
In the case that power reduces, refrigerant can be flowed into more in the less air intake duct of resistance.Therefore, the aperture of the second regulating valve 24 is increased
While reduce the first regulating valve 14 aperture can reach reduce the first compressor refrigerant soakage effect.
In embodiment three, when the difference of first exhaust temperature and second exhaust temperature is more than the first preset value, or and
The difference of first exhaust temperature and second exhaust temperature is when being less than the second preset value to the first compressor 10 and the second compressor 20
Influence and embodiment one it is identical with embodiment two, will not be repeated here.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (11)
1. a kind of air-conditioner, including：
The first compressor (10) and the second compressor (20) being arranged in parallel, the air-conditioner also include being connected to first pressure
The first air intake duct (11) and downtake pipe (12) on contracting machine (10) and be connected on second compressor (20)
Two air intake ducts (21) and second exhaust pipe (22),
Characterized in that, the air-conditioner also includes：
First temperature sensor (13), is arranged on the downtake pipe (12) and for obtaining first compressor (10)
First exhaust temperature；
Second temperature sensor (23), is arranged on the second exhaust pipe (22) and for obtaining second compressor (20)
Second exhaust temperature；
First regulating valve (14), is arranged on first air intake duct (11), and first regulating valve (14) is described for controlling
The refrigerant soakage of the first compressor (10)；
Second regulating valve (24), is arranged on second air intake duct (21), and second regulating valve is used to control described second
The refrigerant soakage of compressor (20),
Wherein, the aperture of first regulating valve (14) and/or the second regulating valve (24) is by the first exhaust temperature and institute
The difference for stating second exhaust temperature determines.
2. air-conditioner according to claim 1, it is characterised in that the air-conditioner also includes controller (30), described the
One temperature sensor (13), the second temperature sensor (23), first regulating valve (14) and second regulating valve
(24) it is connected with the controller (30).
3. a kind of control method of air-conditioner, it is characterised in that the air-conditioner is the air-conditioner described in claim 1 or 2, institute
Stating control method includes：
The first exhaust temperature of downtake pipe (12) is obtained, the second exhaust temperature of second exhaust pipe (22) is obtained；
First regulating valve (14) and/or institute are controlled by the difference of the first exhaust temperature and the second exhaust temperature
State the aperture of the second regulating valve (24).
4. control method according to claim 3, it is characterised in that by the first exhaust temperature and the second row
The step of difference of temperature degree controls the aperture of first regulating valve (14) and/or second regulating valve (24) includes：
When the first exhaust temperature is more than the second exhaust temperature, and the first exhaust temperature and the second exhaust
When the difference of temperature is more than the first preset value, maintain the aperture of first regulating valve (14) constant, reduce second regulation
The aperture of valve (24)；
When the first exhaust temperature is less than the second exhaust temperature, and the first exhaust temperature and the second exhaust
When the difference of temperature is less than the second preset value, maintain the aperture of second regulating valve (24) constant, reduce first regulation
The aperture of valve (14)；
When the first exhaust temperature is preset with the difference of the second exhaust temperature in first preset value and described second
When between value, maintain the aperture of first regulating valve (14) and second regulating valve (24) constant.
5. control method according to claim 3, it is characterised in that by the first exhaust temperature and the second row
The step of difference of temperature degree controls the aperture of first regulating valve (14) and/or second regulating valve (24) includes：
When the first exhaust temperature is more than the second exhaust temperature, and the first exhaust temperature and the second row temperature
When the difference of degree is more than the first preset value, maintain the aperture of second regulating valve (24) constant, increase by first regulating valve
(14) aperture；
When the first exhaust temperature is less than the second exhaust temperature, and the first exhaust temperature and the second row temperature
When the difference of degree is less than the second preset value, maintain the aperture of first regulating valve (14) constant, increase by second regulating valve
(24) aperture；
When the first exhaust temperature is preset with the difference of the second exhaust temperature in first preset value and described second
When between value, maintain the aperture of first regulating valve (14) and second regulating valve (24) constant.
6. control method according to claim 3, it is characterised in that by the first exhaust temperature and the second row
The step of difference of temperature degree controls the aperture of first regulating valve (14) and/or second regulating valve (24) includes：
When the first exhaust temperature is more than the second exhaust temperature, and the first exhaust temperature and the second row temperature
When the difference of degree is more than the first preset value, the second regulating valve (24) is reduced while the aperture for increasing by first regulating valve (14)
Aperture；
When the first exhaust temperature is less than the second exhaust temperature, and the first exhaust temperature and the second row temperature
When the difference of degree is less than the second preset value, the first regulating valve (14) is reduced while the aperture for increasing by second regulating valve (24)
Aperture；
When the first exhaust temperature is preset with the difference of the second exhaust temperature in first preset value and described second
When between value, maintain the aperture of first regulating valve (14) and second regulating valve (24) constant.
7. the control method according to any one of claim 4 to 6, it is characterised in that first preset value is 5 DEG C,
Second preset value is -5 DEG C.
8. control method according to claim 4, it is characterised in that reduce the step of the aperture of second regulating valve (24)
In rapid, the percentage of the reduction of the aperture of second regulating valve (24) is obtained by the following formula：
A=((T1-T2The % of)/5)；
Wherein, the A is the percentage of the reduction of the aperture of second regulating valve (24), the T1It is the first row temperature
Degree, the T2It is the second exhaust temperature.
9. control method according to claim 4, it is characterised in that reduce the step of the aperture of first regulating valve (14)
In rapid, the percentage of the reduction of the aperture of first regulating valve (14) is obtained by the following formula：
B=((T2-T1The % of)/5)；
Wherein, the B is the percentage of the reduction of the aperture of first regulating valve (14), the T2It is the second row temperature
Degree, the T1It is the first exhaust temperature.
10. control method according to claim 3, it is characterised in that obtain the first row of the downtake pipe (12)
Temperature degree, it is further comprising the steps of before obtaining the second exhaust temperature of the second exhaust pipe (22)：
Close first regulating valve (14) and second regulating valve (24)；
Open first regulating valve (14) and second regulating valve (24), and make first regulating valve (14) and described
Second regulating valve (24) is with identical aperture；
Open first compressor (10) and second compressor (20) simultaneously.
11. control methods according to claim 10, it is characterised in that make first regulating valve (14) and described second
The step of regulating valve (24) is with identical aperture includes：
First regulating valve (14) and second regulating valve (24) is set to open to maximum opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057112.5A CN104613615B (en) | 2015-02-03 | 2015-02-03 | Air conditioner and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510057112.5A CN104613615B (en) | 2015-02-03 | 2015-02-03 | Air conditioner and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104613615A CN104613615A (en) | 2015-05-13 |
| CN104613615B true CN104613615B (en) | 2017-06-06 |
Family
ID=53148189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510057112.5A Active CN104613615B (en) | 2015-02-03 | 2015-02-03 | Air conditioner and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104613615B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705519B (en) * | 2015-11-12 | 2019-04-19 | 新特能源股份有限公司 | Multistage refrigerating plant and its control method |
| CN106338118A (en) * | 2016-09-29 | 2017-01-18 | 广东美的制冷设备有限公司 | Air conditioning system and control method thereof |
| CN106440273A (en) * | 2016-09-29 | 2017-02-22 | 广东美的制冷设备有限公司 | Air conditioner system and control method thereof |
| CN106871372A (en) * | 2017-03-16 | 2017-06-20 | 广东美的暖通设备有限公司 | The recognition methods of air-conditioning system and its exhaust gas temperature sensor |
| CN110250930A (en) | 2017-08-09 | 2019-09-20 | 沙克忍者运营有限责任公司 | Cooking system |
| CN107621047A (en) * | 2017-08-15 | 2018-01-23 | 珠海格力电器股份有限公司 | Control method and device of air conditioning unit |
| CN116412116A (en) * | 2021-12-29 | 2023-07-11 | 广东美的白色家电技术创新中心有限公司 | Control method, device, equipment and medium for exhaust temperature of compressor |
| CN116379658A (en) * | 2023-04-23 | 2023-07-04 | 珠海格力电器股份有限公司 | Dual-compressor control system, method and electric equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09243139A (en) * | 1996-03-05 | 1997-09-16 | Kajima Corp | Air conditioner system |
| CN2628969Y (en) * | 2003-04-02 | 2004-07-28 | 海尔集团公司 | Multi compressor variable capacity fixed frequency one with several air conditioner |
| EP1524475B1 (en) * | 2003-10-17 | 2008-02-20 | LG Electronics, Inc. | Apparatus and method for controlling the super-heating degree in a heat pump system |
| JP2014031916A (en) * | 2012-08-02 | 2014-02-20 | Panasonic Corp | Refrigeration device |
| CN103629791A (en) * | 2013-12-03 | 2014-03-12 | 孙厚永 | Air conditioning unit for machine room |
| CN203642549U (en) * | 2013-11-14 | 2014-06-11 | 广东美的暖通设备有限公司 | Compressor unit system and heat pump system |
-
2015
- 2015-02-03 CN CN201510057112.5A patent/CN104613615B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09243139A (en) * | 1996-03-05 | 1997-09-16 | Kajima Corp | Air conditioner system |
| CN2628969Y (en) * | 2003-04-02 | 2004-07-28 | 海尔集团公司 | Multi compressor variable capacity fixed frequency one with several air conditioner |
| EP1524475B1 (en) * | 2003-10-17 | 2008-02-20 | LG Electronics, Inc. | Apparatus and method for controlling the super-heating degree in a heat pump system |
| JP2014031916A (en) * | 2012-08-02 | 2014-02-20 | Panasonic Corp | Refrigeration device |
| CN203642549U (en) * | 2013-11-14 | 2014-06-11 | 广东美的暖通设备有限公司 | Compressor unit system and heat pump system |
| CN103629791A (en) * | 2013-12-03 | 2014-03-12 | 孙厚永 | Air conditioning unit for machine room |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104613615A (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104613615B (en) | Air conditioner and control method thereof | |
| US10775069B2 (en) | HVAC system and corresponding methods of controlling HVAC fan and coil capacity | |
| CN106524355B (en) | Air conditioner energy saving control method | |
| CN102767887B (en) | VRF (varied refrigerant volume) air conditioning system and control method of VRF air conditioning system | |
| CN106288197A (en) | A kind of air conditioning control method based on pid algorithm and system thereof | |
| CN106765915B (en) | Air conditioner energy saving control method | |
| CN106765563B (en) | Air conditioner energy saving control method | |
| CN105299956A (en) | Compressor oil return control device and method and air conditioner with device | |
| CN107036245B (en) | Multi-split air conditioner system and control device and method of outdoor compressor thereof | |
| CN112361538B (en) | Oil return control method and device and multi-split system | |
| CN104729163B (en) | air conditioning system and defrosting control method thereof | |
| CN106765914B (en) | Air conditioner energy saving control method | |
| CN106594988A (en) | Energy-saving control method for air conditioner | |
| CN106440267B (en) | Air conditioner energy saving control method | |
| CN106895623A (en) | Air-conditioner and its delivery temperature control method | |
| CN106594871B (en) | Air conditioner energy saving control method | |
| CN104791912A (en) | Multi-compressor air conditioning system and control method thereof | |
| CN105588286A (en) | Control method and device of multi-split air conditioner | |
| CN106556079A (en) | Off-premises station, the temperature-controlled process of electric-controlled box and device | |
| WO2016045171A1 (en) | Oil-return control method, device and outdoor unit of variable-frequency air conditioner | |
| CN106765908B (en) | Air conditioner energy saving control method | |
| CN107084547A (en) | Air-conditioning system and the control method for air-conditioning system | |
| CN106642559B (en) | Air conditioner energy saving control method | |
| CN104214905A (en) | Air conditioner and controlling method thereof | |
| KR100926529B1 (en) | Multi-type air conditioner and the controlling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |