CN107449078A - Air-conditioning system, the control device of air-conditioning system and method - Google Patents
Air-conditioning system, the control device of air-conditioning system and method Download PDFInfo
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- CN107449078A CN107449078A CN201710618987.7A CN201710618987A CN107449078A CN 107449078 A CN107449078 A CN 107449078A CN 201710618987 A CN201710618987 A CN 201710618987A CN 107449078 A CN107449078 A CN 107449078A
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- temperature
- air
- heat exchanger
- conditioning system
- valve member
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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
- 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
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F25B41/40—Fluid line arrangements
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air-conditioning system, the control device of air-conditioning system and method, the first port of indoor heat exchanger is connected by the 3rd pipeline with compressor, the second port of indoor heat exchanger is connected by the second pipeline with outdoor heat exchanger, and the N number of branch road being connected in parallel is connected in parallel or series with the second pipeline；N number of valve member is correspondingly arranged in N number of branch road, and each valve member is used to control being turned on and off for corresponding branch road；First temperature detecting unit is used for the refrigerant temperature for detecting indoor heat exchanger；Second temperature detection unit is used for the suction temperature for detecting compressor；Control unit is used to obtain the temperature difference between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger, and controls being turned on and off for N number of valve member according to temperature difference.Thus, it is possible to be turned on and off by control valve component to control the cold medium flux of air-conditioning system, and then ensure that the refrigerant for getting in heat exchanger is not in the phenomenon of overheat, so as to improve the refrigeration performance of air-conditioning.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of control device of air-conditioning system, a kind of air-conditioning system, one
The control method and a kind of non-transitorycomputer readable storage medium of kind air-conditioning system.
Background technology
In correlation technique, the evaporator and condensation vessel volume of frequency conversion High-energy-efficienair air conditioner system are generally all bigger, and system is cold
Matchmaker's amount charges is higher by 30% than common air-conditioning system.But correlation technique the problem of existing is that energy efficient system is typically using small
The compressor of discharge capacity, coolant quantity exceed compressor maximum charging amount, to compressor return liquid, oil return and reliability exist compared with
Big potential safety hazard, moreover, when compressor is run under low frequency state, the flow velocity of system is smaller, and refrigerant accumulates in condensation substantially
In device, cause the refrigerant in evaporator on the low side, cause the suction temperature of compressor to occur fluctuating and the phenomenon of temperature drift, be
Controlling cold declines, and EER (Energy Efficiency Ratio, the coefficient of performance of refrigerating of air conditioner) is decreased obviously.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
First purpose be to propose a kind of control device of air-conditioning system, and the refrigerant that can ensure into evaporator is not in overheat
Phenomenon, the suction temperature of compressor is not in the phenomenon of fluctuation and temperature drift.
Second object of the present invention is to propose a kind of air-conditioning system.
Third object of the present invention is to propose a kind of control method of air-conditioning system.
Fourth object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of control device of air-conditioning system, described
Air-conditioning system includes compressor, outdoor heat exchanger and indoor heat exchanger, and the first port of the indoor heat exchanger passes through the 3rd pipe
Road is connected with the compressor, and the second port of the indoor heat exchanger is connected by the second pipeline with the outdoor heat exchanger,
Described device includes：The N number of branch road being connected in parallel, the N number of branch road being connected in parallel and second pipeline are in parallel or series
Connection, wherein, N is the integer more than 1；N number of valve member, N number of valve member are correspondingly arranged in N number of branch road, often
Individual valve member is used to control being turned on and off for corresponding branch road；First temperature detecting unit, first temperature detecting unit
For detecting the refrigerant temperature of the indoor heat exchanger；Second temperature detection unit, the second temperature detection unit are used to examine
Survey the suction temperature of the compressor；Control unit, described control unit are examined with N number of valve member, first temperature
Survey unit and the second temperature detection unit is respectively connected with, described control unit is used for the suction temperature for obtaining the compressor
Temperature difference between the refrigerant temperature of the indoor heat exchanger, and N number of valve member is controlled according to the temperature difference
It is turned on and off.
The control device of the air-conditioning system proposed according to embodiments of the present invention, the N number of branch road being connected in parallel are disposed in the interior
On the second pipeline that the second port of heat exchanger is connected with outdoor heat exchanger, N number of valve member is correspondingly arranged on N number of branch road, often
Individual valve member is used to controlling being turned on and off for corresponding branch road, control unit by obtain the suction temperature of compressor with it is indoor
Temperature difference between the refrigerant temperature of heat exchanger, and being turned on and off for N number of valve member is controlled according to temperature difference, thus, this
The device of inventive embodiments can be turned on and off to control the cold medium flux of air-conditioning system by control valve component, and then
Ensure that getting in the refrigerant of heat exchanger is not in the phenomenon of overheat, and ensure that the suction temperature of compressor is not in fluctuation
And the phenomenon of temperature drift, so as to improve the refrigeration performance of air-conditioning, the reliability of compressor is improved, lifts the experience of user.
According to one embodiment of present invention, multiple temperature ranges, the multiple temperature range and multiple unlatching numbers are constructed
Amount corresponds to respectively, wherein, described control unit is further used for obtaining the temperature range belonging to the temperature difference, and according to described
Quantity is opened corresponding to temperature range belonging to temperature difference to be controlled N number of valve member.
According to one embodiment of present invention, when the air-conditioning system is freezed, described control unit is further used
In：When the temperature difference is more than the first temperature, any one unlatching in N number of valve member is controlled；In the temperature
When difference is more than or equal to the second temperature and is less than or equal to the first temperature, any M in N number of valve member is controlled to open
Open, wherein, M is the integer more than 1 and less than N；When the temperature difference is less than the second temperature, N number of valve is controlled
Component is opened.
According to one embodiment of present invention, N number of branch road is arranged at the second port of the indoor heat exchanger, institute
The first port that temperature detecting unit is arranged at the indoor heat exchanger is stated, with the first end by detecting the indoor heat exchanger
The refrigerant temperature of mouth obtains the refrigerant temperature of the indoor heat exchanger.
According to one embodiment of present invention, described control unit is additionally operable to obtain the running frequency of the air-conditioning system,
And N number of valve member is controlled according to the temperature difference when the running frequency of the air-conditioning system is less than predeterminated frequency.
To reach above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of air-conditioning system, including described air-conditioning
The control device of system.
The air-conditioning system proposed according to embodiments of the present invention, by the control device of air-conditioning system, guarantee, which is got in, changes
The refrigerant of hot device is not in the phenomenon of overheat, and ensures that the suction temperature of compressor is not in fluctuation and temperature drift
Phenomenon, so as to improve the refrigeration performance of air-conditioning, the reliability of compressor is improved, lifts the experience of user
To reach above-mentioned purpose, third aspect present invention embodiment proposes a kind of control method of air-conditioning system, described
Air-conditioning system includes compressor, outdoor heat exchanger, indoor heat exchanger, N number of branch road and N number of valve member, the indoor heat exchanger
First port be connected by the 3rd pipeline with the compressor, the second port of the indoor heat exchanger by the second pipeline with
The outdoor heat exchanger is connected, and N number of branch circuit parallel connection connection, the N number of branch road being connected in parallel and second pipeline are simultaneously
Join or be connected in series, N number of valve member is correspondingly arranged in N number of branch road, and each valve member is used to control corresponding branch
Road is turned on and off, and N is the integer more than 1, be the described method comprises the following steps：Detect the refrigerant temperature of the indoor heat exchanger
Degree；Detect the suction temperature of the compressor；Obtain the suction temperature of the compressor and the refrigerant temperature of the indoor heat exchanger
Temperature difference between degree, and being turned on and off for N number of valve member is controlled according to the temperature difference.
The control method of the air-conditioning system proposed according to embodiments of the present invention, by the refrigerant temperature for detecting indoor heat exchanger
With the suction temperature of compressor, the temperature difference between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger is obtained, and
Being turned on and off for N number of valve member is controlled according to temperature difference.Thus, the method for the embodiment of the present invention, control valve can be passed through
Door component is turned on and off to control the cold medium flux of air-conditioning system, and then the refrigerant for ensureing to get in heat exchanger will not go out
The phenomenon now overheated, and ensure that the suction temperature of compressor is not in the phenomenon of fluctuation and temperature drift, so as to improve sky
The refrigeration performance of tune, the reliability of compressor is improved, lift the experience of user.
According to one embodiment of present invention, multiple temperature ranges, the multiple temperature range and multiple unlatching numbers are constructed
Amount corresponds to respectively, described to control being turned on and off for N number of valve member according to the refrigerant temperature of the air-conditioning system, wraps
Include：Obtain the temperature range belonging to the temperature difference；Quantity control is opened corresponding to temperature range according to belonging to the temperature difference
Make N number of valve member.
According to one embodiment of present invention, it is described according to the temperature difference control when the air-conditioning system is freezed
Being turned on and off for N number of valve member is made, including：When the temperature difference is more than the first temperature, N number of valve is controlled
Any one unlatching in component；When the temperature difference is more than or equal to the second temperature and is less than or equal to the first temperature, control
Any M unlatching in N number of valve member is made, wherein, M is the integer more than 1 and less than N；It is less than in the temperature difference
During the second temperature, N number of valve member is controlled to open.
According to one embodiment of present invention, obtained by the refrigerant temperature for the first port for detecting the indoor heat exchanger
The refrigerant temperature of the indoor heat exchanger.
According to one embodiment of present invention, the control method of described air-conditioning system also includes：Obtain the air-conditioning system
The running frequency of system；When the running frequency of the air-conditioning system is less than predeterminated frequency, controlled according to the temperature difference described N number of
Valve member.
To reach above-mentioned purpose, fourth aspect present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter, computer program is stored thereon with, the control method of described air-conditioning system is realized when the program is executed by processor.
The non-transitory computer-readable medium proposed according to embodiments of the present invention, by the controlling party for performing air-conditioning system
Method, ensure that getting in the refrigerant of heat exchanger is not in the phenomenon of overheat, and ensure that the suction temperature of compressor is not in
Fluctuation and the phenomenon of temperature drift, so as to improve the refrigeration performance of air-conditioning, improve the reliability of compressor, lift the body of user
Test.
Brief description of the drawings
Fig. 1 is the block diagram of the control device of air-conditioning system according to embodiments of the present invention；
Fig. 2 is the structural representation of air-conditioning system according to an embodiment of the invention；
Fig. 3 is the block diagram of air-conditioning system according to embodiments of the present invention；
Fig. 4 is the flow chart of the control method of air-conditioning system according to embodiments of the present invention；
Fig. 5 is the flow chart of the control method of air-conditioning system according to an embodiment of the invention；And
Fig. 6 is the flow chart of the control method of air-conditioning system in accordance with another embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the control device of the air-conditioning system of the embodiment of the present invention, air-conditioning system and air-conditioning system described
Control method.
Fig. 1 is the block diagram of the control device of air-conditioning system according to embodiments of the present invention.Wherein, according to Fig. 2's
Embodiment, air-conditioning system may include compressor 1, outdoor heat exchanger 2 and indoor heat exchanger 3, and the first port of indoor heat exchanger 3 is led to
Cross the 3rd pipeline 8 with compressor 1 to be connected, the second port of indoor heat exchanger 3 is connected by the second pipeline 7 with outdoor heat exchanger 2.
Further, as shown in Fig. 2 the second port that the second port of outdoor heat exchanger 2 passes through the second pipeline 7 and indoor heat exchanger 3
It is connected, the first port of indoor heat exchanger 3 is connected by the 3rd pipeline 8 with compressor 1.
Specifically, as shown in Fig. 2 air-conditioning system may also include throttling arrangement 4 and four-way valve 5, wherein, the of four-way valve 5
One end C is connected with the first port of outdoor heat exchanger 2, and the second end S of four-way valve 5 is connected with the gas outlet of compressor 1, i.e., outdoor
The first port of heat exchanger 2 can be connected by four-way valve 5 with the gas outlet of compressor 1, and the 3rd end E of four-way valve 5 changes with interior
The first port of hot device 3 is connected, and the 4th end D of four-way valve 5 is connected with the gas returning port of compressor 1, i.e. the first of indoor heat exchanger 3
Port can be connected by four-way valve with the gas returning port of compressor 1, and the second port of outdoor heat exchanger 2 passes through the second pipeline 7 and room
Interior heat exchanger 3 is connected, and throttling arrangement 4 is provided with the second pipeline 7.
As depicted in figs. 1 and 2, the control device of the air-conditioning system of the embodiment of the present invention includes：The N number of branch road being connected in parallel
10th, N number of valve member 11, the first temperature detecting unit 30, second temperature detection unit 40 and control unit 20.
Wherein, the N number of branch road being connected in parallel is connected in parallel or series with the first pipeline 6, wherein, N is the integer more than 1；
Such as shown in Fig. 2, the N number of branch road 10 and the first pipeline 6 that are connected in parallel are connected in parallel；N number of valve member 11 is correspondingly arranged in N number of
Branch road 10, each valve member can be series at corresponding branch road, and each valve member is used for unlatching or the pass for controlling corresponding branch road
Close；First temperature detecting unit 30 is used for the refrigerant temperature for detecting indoor heat exchanger 3；Second temperature detection unit 40 is used to detect
The suction temperature of compressor 1；Control unit 20 detects with N number of valve member 11, the first temperature detecting unit 30 and second temperature
Unit 40 is respectively connected with, and control unit 20 is used to obtain between the suction temperature of compressor 1 and the refrigerant temperature of indoor heat exchanger 3
Temperature difference, and control N number of valve member 11 to be turned on and off according to temperature difference.
It should be noted that N number of branch road 10 can be connected in parallel throttling arrangement 4 and indoor heat exchanger 3 second port it
Between, the first temperature detecting unit 30 may be disposed between the first port of indoor heat exchanger 3 and the 3rd end E of four-way valve 5, and second
Temperature detecting unit 40 may be disposed at the air entry of compressor 1, specifically, as shown in Fig. 2 N number of branch road 10 in parallel is arranged at
At the first port of indoor heat exchanger 3, the first temperature detecting unit 30 is arranged at the second port of indoor heat exchanger 3, to pass through
The refrigerant temperature for detecting the first port of indoor heat exchanger 3 obtains the refrigerant temperature of indoor heat exchanger, and then control unit 20
According to the temperature difference between the suction temperature of compressor 1 and the refrigerant temperature of indoor heat exchanger 3 control N number of valve member unlatching or
Close.
Specifically, within air-conditioning systems, the second port of indoor heat exchanger 3 passes through the second pipeline and outdoor heat exchanger 2
Be connected, the second pipeline is connected in parallel or is connected in series N number of branch road 10, be provided with each branch road for control the branch road open or
The valve member of closing, the first temperature detecting unit 30 can detect the refrigerant temperature of indoor heat exchanger 3, second temperature detection in real time
Unit 40 can detect the suction temperature of compressor 1 in real time, and the first temperature detecting unit 30 will be examined with second temperature detection unit 40
The temperature measured is sent to control unit 20, and control unit 20 obtains the suction temperature of compressor 1 and the refrigerant of indoor heat exchanger 3
Temperature difference between temperature, and being turned on and off for N number of valve member is controlled according to temperature difference.
Thereby, it is possible to being turned on and off to control the cold medium flux of air-conditioning system, Jin Erbao by control valve component
Card gets in the refrigerant of heat exchanger and is not in the phenomenon of overheat, and ensure compressor suction temperature be not in fluctuation with
And the phenomenon of temperature drift, so as to improve the refrigerating capacity of air-conditioning, the reliability of compressor is improved, lifts the experience of user.
According to one embodiment of present invention, multiple temperature ranges, multiple temperature ranges and multiple unlatching quantity point are constructed
Not Dui Ying, wherein, control unit 20 is further used for obtaining the temperature range belonging to temperature difference, and the temperature according to belonging to temperature difference
Quantity is opened corresponding to degree section to be controlled N number of valve member 11.
It should be noted that can be according to the temperature between the suction temperature of compressor 1 and the refrigerant temperature of indoor heat exchanger 3
Difference constructs the temperature range of multiple temperature differences, and multiple temperature ranges can be corresponding respectively with multiple valve members unlatching quantity, i.e., every
Individual indexing section can be corresponding with a unlatching quantity, wherein, each quantity of opening can be to be less than or equal to N integer more than 0.
Specifically, can be by presetting multiple temperature thresholds to construct multiple temperature ranges, for example, can be at least provided with a temperature
Threshold value is spent, is first temperature range when temperature is less than temperature threshold, is second when temperature is more than or equal to temperature threshold
Temperature range；And for example, two temperature thresholds can be set, be first temperature range when temperature is more than the first temperature threshold, when
Temperature is second temperature section when being more than or equal to second temperature and being less than or equal to the first temperature, is when temperature is less than second temperature
3rd temperature range；For another example, three temperature thresholds can be set, be the first temperature range when temperature is more than the first temperature threshold,
It is second temperature section when temperature is more than or equal to second temperature and is less than or equal to the first temperature, when temperature is more than or equal to the 3rd temperature
It is the 3rd temperature range when spending and being less than second temperature, is the 4th temperature range when temperature is less than three temperature.Wherein, each
Temperature range has the unlatching quantity of corresponding valve member, with by control the unlatching of the corresponding valve member for opening quantity come
Adjust the cold medium flux of air-conditioning system.
Specifically, control unit 20 can obtain the refrigerant temperature of indoor heat exchanger 3 by the first temperature detecting unit 30
The suction temperature of compressor 1 is obtained with second temperature detection unit 40, and then obtains refrigerant temperature and the compression of indoor heat exchanger 3
The temperature difference of the suction temperature of machine 1, and open quantity according to corresponding to temperature difference and N number of valve member 11 is controlled, that is, control
The corresponding valve member for opening quantity in N number of valve member 11 is made to open.
According to one embodiment of present invention, when air-conditioning system is freezed, control unit 20 is further used for：In temperature
When degree difference is more than the first temperature, any one unlatching in N number of valve member 11 is controlled；It is more than or equal to second temperature in temperature difference
And when being less than or equal to the first temperature, any M unlatching in N number of valve member is controlled, wherein, M is more than 1 and whole less than N
Number；When temperature difference is less than second temperature, N number of valve member 11 is controlled to open.
That is, air-conditioning system is predeterminable two temperature thresholds i.e. the first temperature and second temperature, to construct three
Temperature range, wherein, the corresponding valve member of first temperature range is opened, and second temperature range corresponds to M valve group
Part is opened, and the 3rd temperature range corresponds to N number of valve member and opened.
Specifically, when air-conditioning system is freezed, control unit 20 obtains the suction temperature of compressor 1 and indoor heat exchange
Temperature difference between the refrigerant temperature of device 3, and judge the temperature range belonging to temperature difference, i.e., temperature difference and preset temperature in judgement
Relation between threshold value, if temperature difference is more than the first temperature, control unit 20 then controls any one in N number of valve member 11
Individual unlatching；If temperature difference is more than or equal to second temperature and is less than or equal to the first temperature, control unit 20 then controls N number of valve group
Any M unlatching in part 11；If temperature difference is less than second temperature, control unit 20 then controls N number of valve member 11 to open
Open.Wherein, second temperature is less than the first temperature.
It should be understood that the temperature difference between the suction temperature of compressor 1 and the refrigerant temperature of indoor heat exchanger 3 is smaller
When, as indoor heat exchanger 3 needs more refrigerant to be freezed, and now, opens more valve member 11, increases refrigerant from outdoor
Heat exchanger 2 flows to the flow of indoor heat exchanger 3；Make the refrigerant in indoor heat exchanger 3 sufficient, it is ensured that to be flowed to from indoor heat exchanger 3
The refrigerant temperature of compressor 1 will not be higher, that is, ensures the suction temperature of compressor and will not raise.Thus, the basis of control unit 20
Temperature difference between the suction temperature of compressor 1 and the refrigerant temperature of indoor heat exchanger 3 control N number of valve member 11 unlatching or
Close, to change the cold medium flux of air-conditioning system.
Wherein, according to the specific embodiment of the present invention, when N is even number, M=N/2；When N is odd number, M=(N+
1)/2.For example, N, which may be configured as 6, M, may be configured as 3, i.e., it is more than or equal to second temperature in temperature difference and is less than or equal to the first temperature
When can open 3 valve members 11, other N-3 valve members (i.e. 3 valve members 11) are turned off.
For example, the first temperature may be configured as 5 DEG C, and second temperature may be configured as 2 DEG C, for example, when air-conditioning system is carried out
During refrigeration, control unit 20 obtains the suction temperature T of compressor 1InhaleWith the refrigerant temperature T of indoor heat exchanger 3SteamBetween temperature
Poor TInhale-TSteam, in temperature difference TInhale-TSteamMore than the first temperature (i.e. TInhale-TSteam5 DEG C of ＞) when, control unit 20 controls 6 valve groups
Any one unlatching in part 11, and control other 5 valve members 11 to be turned off；In temperature differenceInhale-TSteamMore than second temperature
And it is less than the first temperature (i.e. 2 DEG C≤TInhale-TSteam≤ 5 DEG C) when, control unit 20 controls any 3 in 6 valve members 11 to open
Open, and control other 3 valve members 11 to close；In temperature difference TInhale-TSteamLess than 2 DEG C of (i.e. T of second temperatureInhale-TSteam2 DEG C of ＜)
When, control unit 20 controls 6 valve members 11 to open.
Further, according to one embodiment of present invention, control unit 20 is additionally operable to obtain the operation frequency of air-conditioning system
Rate, and when the running frequency of air-conditioning system is less than predeterminated frequency according to the cold of the suction temperature of compressor 1 and indoor heat exchanger 3
Temperature difference between matchmaker's temperature controls N number of valve member 11.
That is, when air-conditioning system is freezed, if the low-frequency operation of compressor 1, according to the air-breathing of compressor 1
Temperature difference between the refrigerant temperature of temperature and indoor heat exchanger 3 controls N number of valve member 11.Transported when the low frequency of compressor 1 freezes
During row, the refrigerant flow rate of air-conditioning system is relatively low, and coolant quantity is easily accumulated in outdoor heat exchanger 2, opens more valve member 11,
Ensure that the coolant quantity for getting in heat exchanger 3 is more sufficient
In addition, according to one embodiment of present invention, control unit 20 is additionally operable to be more than in the running frequency of air-conditioning system
N number of valve member 11 is controlled to be all turned on during equal to predeterminated frequency.
That is, when air-conditioning system is freezed, if the high frequency of compressor 1 is run, outdoor heat exchanger 2 is entirely managed
Road whole participation action, i.e., N number of valve member 11 are all turned on, and are circulated with refrigerant when meeting air-conditioning system high frequency refrigeration.
In summary, the control device of the air-conditioning system proposed according to embodiments of the present invention, the N number of branch road being connected in parallel are set
Put on the second pipeline that the second port of heat exchanger indoors is connected with outdoor heat exchanger, N number of valve is correspondingly arranged on N number of branch road
Component, each valve member are used to controlling being turned on and off for corresponding branch road, and control unit is by obtaining the air-breathing temperature of compressor
Temperature difference between degree and the refrigerant temperature of indoor heat exchanger, and being turned on and off for N number of valve member is controlled according to temperature difference,
Thus, the device of the embodiment of the present invention can be turned on and off to control the refrigerant stream of air-conditioning system by control valve component
Amount, and then the refrigerant for ensureing to get in heat exchanger is not in the phenomenon of overheat, and ensure that the suction temperature of compressor will not
Appearance is fluctuated and the phenomenon of temperature drift, so as to improve the refrigeration performance of air-conditioning, improves the reliability of compressor, lifts user
Experience.
The embodiment of the present invention also proposed a kind of air-conditioning system.
Fig. 3 is the block diagram of air-conditioning system according to embodiments of the present invention.As shown in Fig. 2 air-conditioning system 200 includes
The control device 100 of above-mentioned air-conditioning system.
The air-conditioning system proposed according to embodiments of the present invention, by the control device of air-conditioning system, guarantee, which is got in, changes
The refrigerant of hot device is not in the phenomenon of overheat, and ensures that the suction temperature of compressor is not in fluctuation and temperature drift
Phenomenon, so as to improve the refrigeration performance of air-conditioning, the reliability of compressor is improved, lifts the experience of user.
Fig. 4 is the flow chart of the control method of air-conditioning system according to embodiments of the present invention.Wherein, according to Fig. 2 implementation
Example, air-conditioning system include compressor, outdoor heat exchanger, indoor heat exchanger, N number of branch road and N number of valve member, indoor heat exchanger
First port is connected by the 3rd pipeline with compressor, and the second port of indoor heat exchanger passes through the second pipeline and outdoor heat exchanger
It is connected, N number of branch circuit parallel connection connection, the N number of branch road being connected in parallel is connected in parallel or series with the second pipeline, N number of valve member pair
N number of branch road should be arranged at, each valve member is used to control being turned on and off for corresponding branch road, and N is the integer more than 1.Enter one
Step ground, as shown in Fig. 2 the second port of outdoor heat exchanger is connected by the second pipeline with the second port of indoor heat exchanger, room
The first port of interior heat exchanger is connected by the 3rd pipeline with compressor.
Specifically, as shown in Fig. 2 air-conditioning system may also include throttling arrangement and four-way valve, wherein, the first end of four-way valve
It is connected with the first port of outdoor heat exchanger, the second end of four-way valve is connected with the gas outlet of compressor, i.e. outdoor heat exchanger
First port can be connected by four-way valve with the gas outlet of compressor, the 3rd end of four-way valve and the first port of indoor heat exchanger
Be connected, the 4th end of four-way valve is connected with the gas returning port of compressor, i.e., the first port of indoor heat exchanger can by four-way valve with
The gas returning port of compressor is connected, and the second port of outdoor heat exchanger is connected by the second pipeline with indoor heat exchanger, the second pipeline
On be provided with throttling arrangement.
As shown in figure 4, the control method of the air-conditioning system of the embodiment of the present invention comprises the following steps：
S1：Detect the refrigerant temperature of indoor heat exchanger.
It should be noted that according to one embodiment of present invention, by detect indoor heat exchanger first port it is cold
Matchmaker's temperature obtains the refrigerant temperature of indoor heat exchanger.Wherein, the cold of indoor heat exchanger can be detected by the first temperature detecting unit
Matchmaker's temperature, the first temperature detecting unit may be disposed at the first port of indoor heat exchanger, specifically, as shown in Fig. 2 N number of branch road
It may be disposed at the second port of indoor heat exchanger, the first temperature detecting unit may be disposed at the first port of indoor heat exchanger.
S2：Detect the suction temperature of compressor.
It should be noted that the suction temperature of compressor can be detected by second temperature detection unit, wherein, second temperature
Detection unit may be disposed at the air entry of compressor.
S3：The temperature difference between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger is obtained, and according to temperature
Difference controls being turned on and off for N number of valve member.
Specifically, when air conditioner refrigerating is run, by detecting the refrigerant temperature of indoor heat exchanger and the air-breathing temperature of compressor
Degree, the temperature difference between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger is obtained, and it is N number of according to temperature difference control
Valve member is turned on and off.
Thereby, it is possible to being turned on and off to control the cold medium flux of air-conditioning system, Jin Erbao by control valve component
Card is not in the phenomenon of overheat into the refrigerant of evaporator, and ensures that the suction temperature of compressor is not in fluctuation and temperature
Higher phenomenon is spent, so as to improve the refrigerating capacity of air-conditioning, the reliability of compressor is improved, lifts the experience of user.
According to one embodiment of present invention, as shown in figure 5, constructing multiple temperature ranges, multiple temperature ranges with it is multiple
Open quantity to correspond to respectively, being turned on and off for N number of valve member is controlled according to temperature difference, including：
S101：Obtain the temperature range belonging to temperature difference.
S102：Quantity is opened corresponding to temperature range according to belonging to temperature difference and controls N number of valve member.
It should be noted that can be according to the temperature difference between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger
The temperature range of multiple temperature differences is constructed, multiple temperature ranges can be corresponding respectively with multiple valve members unlatching quantity, i.e., each
Temperature range can be corresponding with a unlatching quantity, wherein, each quantity of opening can be to be less than or equal to N integer more than 0.
Specifically, can be by presetting multiple temperature thresholds to construct multiple temperature ranges, for example, can be at least provided with a temperature
Threshold value is spent, is first temperature range when temperature is less than temperature threshold, is second when temperature is more than or equal to temperature threshold
Temperature range；And for example, two temperature thresholds can be set, be first temperature range when temperature is more than the first temperature threshold, when
Temperature is second temperature section when being more than or equal to second temperature and being less than or equal to the first temperature, is when temperature is less than second temperature
3rd temperature range；For another example, three temperature thresholds can be set, be the first temperature range when temperature is more than the first temperature threshold,
It is second temperature section when temperature is more than or equal to second temperature and is less than or equal to the first temperature, when temperature is more than or equal to the 3rd temperature
It is the 3rd temperature range when spending and being less than second temperature, is the 4th temperature range when temperature is less than three temperature.Wherein, each
Temperature range has the unlatching quantity of corresponding valve member, with by control the unlatching of the corresponding valve member for opening quantity come
Adjust the cold medium flux of air-conditioning system.
Specifically, the refrigerant temperature of indoor heat exchanger can be obtained by the first temperature detecting unit and second temperature detects
Unit obtains the suction temperature of compressor, and then obtains the suction temperature of compressor and the temperature of the refrigerant temperature of indoor heat exchanger
Difference, and open quantity according to corresponding to temperature difference and N number of valve member is controlled, that is, control and correspondingly opened in N number of valve member
The valve member for opening quantity is opened.
According to one embodiment of present invention, when air-conditioning system is freezed, N number of valve member is controlled according to temperature difference
Be turned on and off, including：When temperature difference is more than the first temperature, any one unlatching in N number of valve member is controlled；Work as temperature
When degree difference is more than or equal to second temperature and is less than or equal to the first temperature, any M unlatching in N number of valve member is controlled, wherein,
M is the integer more than 1 and less than N；When temperature difference is less than second temperature, N number of valve member is controlled to open.
That is, air-conditioning system is predeterminable two temperature thresholds i.e. the first temperature and second temperature, to construct three
Temperature range, wherein, the corresponding valve member of first temperature range is opened, and second temperature range corresponds to M valve group
Part is opened, and the 3rd temperature range corresponds to N number of valve member and opened.
Specifically, when air-conditioning system is freezed, the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger are obtained
Temperature difference between degree, and judge the temperature range belonging to temperature difference, i.e., in judgement between temperature difference and preset temperature threshold value
Relation, if temperature difference is more than the first temperature, control any one unlatching in N number of valve member；If temperature difference is more than
Equal to second temperature and it is less than or equal to the first temperature, then controls any M unlatching in N number of valve member；If temperature difference is small
In second temperature, then N number of valve member is controlled to open.Wherein, second temperature is less than the first temperature.
It should be understood that the temperature difference between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger is smaller
When, as indoor heat exchanger needs more refrigerant to be freezed, and now, opens more valve member, increases refrigerant and is changed from outdoor
Hot device flows to the flow of indoor heat exchanger；Make the refrigerant in indoor heat exchanger sufficient, it is ensured that to flow to compressor from indoor heat exchanger
Refrigerant temperature will not be higher, that is, ensuring the suction temperature of compressor will not raise.Thus, according to the suction temperature of compressor with
Temperature difference between the refrigerant temperature of indoor heat exchanger controls being turned on and off for N number of valve member, to change air-conditioning system
Cold medium flux.
Wherein, according to the specific embodiment of the present invention, when N is even number, M=N/2；When N is odd number, M=(N+
1)/2.For example, N, which may be configured as 6, M, may be configured as 3, i.e., it is more than or equal to second temperature in temperature difference and is less than or equal to the first temperature
When can open 3 valve members, other N-3 valve members (i.e. 3 valve members) are turned off.
For example, the first temperature may be configured as 5 DEG C, and second temperature may be configured as 2 DEG C, for example, when air-conditioning system is carried out
During refrigeration, the suction temperature T of compressor is obtainedInhaleWith the refrigerant temperature T of indoor heat exchangerSteamBetween temperature difference TInhale-TSteam, in temperature
Spend poor TInhale-TSteamMore than the first temperature (i.e. TInhale-TSteam5 DEG C of ＞) when, any one unlatching in 6 valve members is controlled, and control
Other 5 valve members are made to be turned off；In temperature differenceInhale-TSteamMore than second temperature and it is less than the first temperature (i.e. 2 DEG C≤TInhale-TSteam
≤ 5 DEG C) when, any 3 unlatchings in 6 valve members are controlled, and control other 3 valve members to close；In temperature difference TInhale-
TSteamLess than 2 DEG C of (i.e. T of second temperatureInhale-TSteam2 DEG C of ＜) when, 6 valve members of control are opened.
Further, according to one embodiment of present invention, as shown in fig. 6, the control method of air-conditioning system also includes：
S201：Obtain the running frequency of air-conditioning system.
S202：When the running frequency of air-conditioning system is less than predeterminated frequency, N number of valve member is controlled according to temperature difference.
That is, when air-conditioning system is freezed, if compressor low-frequency operation, according to the air-breathing temperature of compressor
Temperature difference between degree and the refrigerant temperature of indoor heat exchanger controls N number of valve member.It is empty when compressor low frequency refrigerating operaton
The refrigerant flow rate of adjusting system is relatively low, and coolant quantity is easily accumulated in outdoor heat exchanger, opens more valve member, it is ensured that enters to enter the room
The coolant quantity of interior heat exchanger is more sufficient
In addition, according to one embodiment of present invention, also when the running frequency of air-conditioning system is more than or equal to predeterminated frequency
N number of valve member is controlled to be all turned on.
That is, when air-conditioning system is freezed, if compressor high frequency is run, the whole pipeline of outdoor heat exchanger
Whole participation actions, i.e., N number of valve member are all turned on, and are circulated with refrigerant when meeting air-conditioning system high frequency refrigeration.
In summary, the control method of the air-conditioning system proposed according to embodiments of the present invention, by detecting indoor heat exchanger
Refrigerant temperature and compressor suction temperature, obtain between the suction temperature of compressor and the refrigerant temperature of indoor heat exchanger
Temperature difference, and being turned on and off for N number of valve member is controlled according to temperature difference.Thus, the method for the embodiment of the present invention, Neng Goutong
Being turned on and off to control the cold medium flux of air-conditioning system of control valve component is crossed, and then ensures to get in the cold of heat exchanger
Matchmaker is not in the phenomenon of overheat, and ensures that the suction temperature of compressor is not in the phenomenon of fluctuation and temperature drift, from
And improve the refrigeration performance of air-conditioning, the reliability of compressor is improved, lifts the experience of user.
The embodiment of the present invention also proposed a kind of non-transitorycomputer readable storage medium, be stored thereon with computer journey
Sequence, the control method of described air-conditioning system is realized when the program is executed by processor.
The non-transitory computer-readable medium proposed according to embodiments of the present invention, by the controlling party for performing air-conditioning system
Method, ensure that getting in the refrigerant of heat exchanger is not in the phenomenon of overheat, and ensure that the suction temperature of compressor is not in
Fluctuation and the phenomenon of temperature drift, so as to improve the refrigerating capacity of air-conditioning, improve the reliability of compressor, lift the body of user
Test.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (12)
1. a kind of control device of air-conditioning system, it is characterised in that the air-conditioning system includes compressor, outdoor heat exchanger and room
Interior heat exchanger, the first port of the indoor heat exchanger are connected by the 3rd pipeline with the compressor, the indoor heat exchanger
Second port be connected by the second pipeline with the outdoor heat exchanger, described device includes：
The N number of branch road being connected in parallel, the N number of branch road being connected in parallel are connected in parallel or series with second pipeline, wherein,
N is the integer more than 1；
N number of valve member, N number of valve member are correspondingly arranged in N number of branch road, and each valve member is used to control correspondingly
Branch road is turned on and off；
First temperature detecting unit, first temperature detecting unit are used for the refrigerant temperature for detecting the indoor heat exchanger；
Second temperature detection unit, the second temperature detection unit are used for the suction temperature for detecting the compressor；
Control unit, described control unit and N number of valve member, first temperature detecting unit and the second temperature
Detection unit is respectively connected with, and described control unit is used to obtaining the cold of the suction temperature of the compressor and the indoor heat exchanger
Temperature difference between matchmaker's temperature, and being turned on and off for N number of valve member is controlled according to the temperature difference.
2. the control device of air-conditioning system according to claim 1, it is characterised in that multiple temperature ranges are constructed, it is described
Multiple temperature ranges and multiple unlatching quantity are corresponding respectively, wherein,
Described control unit is further used for obtaining the temperature range belonging to the temperature difference, and according to belonging to the temperature difference
Quantity is opened corresponding to temperature range to be controlled N number of valve member.
3. the control device of air-conditioning system according to claim 1 or 2, it is characterised in that when the air-conditioning system is carried out
During refrigeration, described control unit is further used for：
When the temperature difference is more than the first temperature, any one unlatching in N number of valve member is controlled；
When the temperature difference is more than or equal to the second temperature and is less than or equal to the first temperature, N number of valve member is controlled
In it is any M unlatching, wherein, M be more than 1 and less than N integer；
When the temperature difference is less than the second temperature, N number of valve member is controlled to open.
4. the control device of air-conditioning system according to claim 1, it is characterised in that N number of branch road is arranged at described
At the second port of indoor heat exchanger, the temperature detecting unit is arranged at the first port of the indoor heat exchanger, to pass through
The refrigerant temperature for detecting the first port of the indoor heat exchanger obtains the refrigerant temperature of the indoor heat exchanger.
5. the control device of air-conditioning system according to claim 1, it is characterised in that described control unit is additionally operable to obtain
The running frequency of the air-conditioning system, and when the running frequency of the air-conditioning system is less than predeterminated frequency according to the temperature difference
Control N number of valve member.
6. a kind of air-conditioning system, it is characterised in that include the control of the air-conditioning system according to any one of claim 1-5
Device.
7. a kind of control method of air-conditioning system, it is characterised in that the air-conditioning system includes compressor, outdoor heat exchanger, room
Interior heat exchanger, N number of branch road and N number of valve member, the first port of the indoor heat exchanger pass through the 3rd pipeline and the compression
Machine is connected, and the second port of the indoor heat exchanger is connected by the second pipeline with the outdoor heat exchanger, and N number of branch road is simultaneously
Connection connection, the N number of branch road being connected in parallel are connected in parallel or series with second pipeline, and N number of valve member is corresponding
It is arranged at N number of branch road, each valve member is used to controlling being turned on and off for corresponding branch road, and N is the integer more than 1, institute
The method of stating comprises the following steps：
Detect the refrigerant temperature of the indoor heat exchanger；
Detect the suction temperature of the compressor；
The temperature difference between the suction temperature of the compressor and the refrigerant temperature of the indoor heat exchanger is obtained, and according to described
Temperature difference controls being turned on and off for N number of valve member.
8. the control method of air-conditioning system according to claim 7, it is characterised in that multiple temperature ranges are constructed, it is described
Multiple temperature ranges and multiple unlatching quantity are corresponding respectively, described described N number of according to the control of the refrigerant temperature of the air-conditioning system
Valve member is turned on and off, including：
Obtain the temperature range belonging to the temperature difference；
Quantity is opened corresponding to temperature range according to belonging to the temperature difference and controls N number of valve member.
9. the control method of the air-conditioning system according to claim 7 or 8, it is characterised in that when the air-conditioning system is carried out
It is described that being turned on and off for N number of valve member is controlled according to the temperature difference during refrigeration, including：
When the temperature difference is more than the first temperature, any one unlatching in N number of valve member is controlled；
When the temperature difference is more than or equal to the second temperature and is less than or equal to the first temperature, N number of valve member is controlled
In it is any M unlatching, wherein, M be more than 1 and less than N integer；
When the temperature difference is less than the second temperature, N number of valve member is controlled to open.
10. the control method of air-conditioning system according to claim 7, it is characterised in that by detecting the indoor heat exchange
The refrigerant temperature of the first port of device obtains the refrigerant temperature of the indoor heat exchanger.
11. the control method of air-conditioning system according to claim 7, it is characterised in that also include：
Obtain the running frequency of the air-conditioning system；
When the running frequency of the air-conditioning system is less than predeterminated frequency, N number of valve member is controlled according to the temperature difference.
12. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, it is characterised in that the program
The control method of the air-conditioning system as described in any in claim 7-11 is realized when being executed by processor.
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Application publication date: 20171208 |