CN107144057B - Air-conditioning system and its control device, method - Google Patents
Air-conditioning system and its control device, method Download PDFInfo
- Publication number
- CN107144057B CN107144057B CN201710386629.8A CN201710386629A CN107144057B CN 107144057 B CN107144057 B CN 107144057B CN 201710386629 A CN201710386629 A CN 201710386629A CN 107144057 B CN107144057 B CN 107144057B
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- Prior art keywords
- throttling
- air
- conditioning system
- refrigerant temperature
- expansion valve
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims abstract description 105
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000005057 refrigeration Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a kind of air-conditioning system and its control devices, method, the outdoor unit of air-conditioning system includes electric expansion valve, its one end is connected with the outdoor heat exchanger of outdoor unit, its the other end is connected with the indoor heat exchanger of the indoor unit of air-conditioning system, and device includes: that first temperature detecting unit of its one end is arranged in for the refrigerant temperature before detecting electric expansion valve throttling；The second temperature detection unit that its other end is arranged in is used to detect the refrigerant temperature after electric expansion valve throttling；Control module, control module is connected with the first temperature detecting unit and second temperature detection unit respectively, control module is run in a chiller mode for controlling air-conditioning system, and obtain the refrigerant temperature before throttling and the refrigerant temperature after throttling, and according to the difference between the refrigerant temperature before throttling and the refrigerant temperature after throttling judge indoor unit with the presence or absence of throttling device, can automatic identification air-conditioning system whether there is the case where double throttle.
Description
Technical field
The present invention relates to field of home appliance technology, in particular to a kind of control device of air-conditioning system, a kind of air-conditioning system
The control method of system and a kind of air-conditioning system.
Background technique
Some Air Conditioning System in the related technology uses indoor unit throttling spool, and another part air-conditioning system uses outdoor unit
Electric expansion valve throttling.But the problem is that, when the indoor unit and outdoor unit of air-conditioning system are separately sold,
If indoor unit above-mentioned and outdoor unit collocation used, it is possible that the case where double throttle, so as to will lead to sky
The delivery temperature of adjusting system is relatively low, also, the aperture of electric expansion valve is adjusted according to delivery temperature, when delivery temperature is relatively low after
It is continuous to turn down electronic expansion valve opening, it may finally lead to system abnormity seriously relatively low with refrigerating capacity, user satisfaction is lower.
Therefore, there are improved needs for the relevant technologies.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
First purpose be to propose a kind of control device of air-conditioning system, can automatic identification air-conditioning system whether there are the feelings of double throttle
Condition.
Second object of the present invention is to propose a kind of air-conditioning system.Third object of the present invention is to propose one kind
The control method of air-conditioning system.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of control device of air-conditioning system, described
The outdoor unit of air-conditioning system includes electric expansion valve, the outdoor heat exchanger phase of one end of the electric expansion valve and the outdoor unit
Even, the other end of the electric expansion valve is connected with the indoor heat exchanger of the indoor unit of the air-conditioning system, and described device includes:
First temperature detecting unit of one end of the electric expansion valve is set, and first temperature detecting unit is described for detecting
Refrigerant temperature before electric expansion valve throttling；The second temperature detection unit of the other end of the electric expansion valve, institute are set
Second temperature detection unit is stated for the refrigerant temperature after detecting the electric expansion valve throttling；Control module, the control mould
Block is connected with first temperature detecting unit and the second temperature detection unit respectively, and the control module is for controlling institute
It states air-conditioning system to run in a chiller mode, and obtains the refrigerant temperature before the throttling and the refrigerant temperature after the throttling, with
And whether the indoor unit is judged according to the difference between the refrigerant temperature before the throttling and the refrigerant temperature after the throttling
In the presence of throttling device.
The control device of the air-conditioning system proposed according to embodiments of the present invention, control module control air-conditioning system with the mould that freezes
Formula operation, and the refrigerant temperature before electric expansion valve throttling can be obtained by the first temperature detecting unit and examined by second temperature
It surveys unit and obtains the refrigerant temperature after electric expansion valve throttling, and then refrigerant temperature and throttling before throttling according to electric expansion valve
The difference between refrigerant temperature afterwards judges indoor unit with the presence or absence of throttling device, so that whether automatic identification air-conditioning system occurs
The case where double throttle, avoids system exception caused by double throttle situation, improves the refrigerating capacity of air-conditioning system, and it is satisfied to promote user
Degree.
According to one embodiment of present invention, the control module is further used for, the refrigerant temperature before the throttling
Difference between the refrigerant temperature after the throttling judges that the indoor unit has section when being less than or equal to preset temperature threshold
Flow device.
According to one embodiment of present invention, the control module is also used to, refrigerant temperature and institute before the throttling
The difference between refrigerant temperature after stating throttling judges that the indoor unit does not have flow controller when being greater than the preset temperature threshold
Part.
According to one embodiment of present invention, the control module is also used to, and judging the indoor unit, there are flow controllers
The electric expansion valve is controlled after part to open to maximum opening.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of air-conditioning system, and described includes described
The control device of air-conditioning system.
The air-conditioning system proposed according to embodiments of the present invention can pass through the control device automatic identification air-conditioning system of air-conditioning system
Whether system there is the case where double throttle, avoids system exception caused by double throttle situation, improves the refrigerating capacity of air-conditioning system, is promoted
User satisfaction.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of control method of air-conditioning system, described
The outdoor unit of air-conditioning system includes electric expansion valve, be the described method comprises the following steps: controlling the air-conditioning system with the mould that freezes
Formula operation；Refrigerant temperature before detecting the electric expansion valve throttling；Refrigerant temperature after detecting the electric expansion valve throttling；
And the air-conditioning system is judged according to the difference between the refrigerant temperature before the throttling and the refrigerant temperature after the throttling
Indoor unit with the presence or absence of throttling device.
The control method of the air-conditioning system proposed according to embodiments of the present invention, first control air-conditioning system are transported in a chiller mode
Row, the refrigerant temperature before then detecting electric expansion valve throttling, and the refrigerant temperature after electric expansion valve throttling is detected, in turn
Judge that the indoor unit of air-conditioning system whether there is according to the difference between the refrigerant temperature before throttling and the refrigerant temperature after throttling
Throttling device avoids system caused by double throttle situation different so that whether automatic identification air-conditioning system the case where double throttle occurs
Often, the refrigerating capacity of air-conditioning system is improved, user satisfaction is promoted.
According to one embodiment of present invention, the refrigerant temperature according to before the throttling and the refrigerant after the throttling
Difference between temperature judges the indoor unit with the presence or absence of throttling device, comprising: if refrigerant temperature before the throttling with
The difference between refrigerant temperature after the throttling is less than or equal to preset temperature threshold, then judges that the indoor unit has throttling
Device.
According to one embodiment of present invention, if the refrigerant temperature before the throttling and the refrigerant temperature after the throttling
Between difference be greater than the preset temperature threshold, then judge the indoor unit do not exist throttling device.
According to one embodiment of present invention, the control method of the air-conditioning system further include: judging the indoor unit
After throttling device, controls the electric expansion valve and open to maximum opening.
Detailed description of the invention
Fig. 1 is the block diagram of the control device of air-conditioning system according to an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of air-conditioning system according to an embodiment of the invention；
Fig. 3 is the block diagram of air-conditioning system according to an embodiment of the present invention；
Fig. 4 is the flow chart of the control method of air-conditioning system according to an embodiment of the present invention；And
Fig. 5 is the flow chart of the control method of air-conditioning system accord to a specific embodiment of that present invention.
Appended drawing reference: compressor 1, outdoor heat exchanger 2, the first temperature detecting unit 3, electric expansion valve 4, second temperature inspection
Survey unit 5；
Throttle valve component 6, throttling valve core 7, indoor heat exchanger 8；
Indoor unit 9, outdoor unit 10, the control device 11 of air-conditioning system, control module 12, throttling device 13, air-conditioning system
14。
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The air-conditioning system and its control device, method of the embodiment of the present invention described with reference to the accompanying drawing.
Fig. 1 is the block diagram of the control device of air-conditioning system according to an embodiment of the present invention.Wherein, as shown in Fig. 2,
The outdoor unit 10 of air-conditioning system includes electric expansion valve 4, one end of electric expansion valve 4 and 2 phase of outdoor heat exchanger of outdoor unit 10
Even, the indoor heat exchanger 8 of the indoor unit 9 of the other end and air-conditioning system of electric expansion valve 4 is connected.
As illustrated in fig. 1 and 2, the control device 11 of the air-conditioning system includes: the first temperature detecting unit 3, second temperature inspection
Survey unit 5 and control module 12.
Wherein, one end of electric expansion valve 4 is arranged in the first temperature detecting unit 3, and the first temperature detecting unit 3 is for examining
Survey the refrigerant temperature T1 before electric expansion valve 4 throttles；The other end of electric expansion valve 4 is arranged in second temperature detection unit 5, the
Two temperature detecting units 5 are used to detect the refrigerant temperature T2 after electric expansion valve 4 throttles；Control module 12 respectively with the first temperature
Detection unit 3 is connected with second temperature detection unit 5, and control module 12 is run in a chiller mode for controlling air-conditioning system, and
The refrigerant temperature T2 after refrigerant temperature T1 and throttling before acquisition throttling, and according to the refrigerant temperature T1 before throttling and after throttling
Refrigerant temperature T2 between difference DELTA T judge indoor unit 9 with the presence or absence of throttling device 13.
Wherein, the first temperature detecting unit 3 and second temperature detection unit 5 can be temperature sensor.
Wherein, control air-conditioning system is run in a chiller mode in embodiments of the present invention.
It should be noted that when control module 12 controls air-conditioning system and runs in a chiller mode, the height of the discharge of compressor 1
Warm high pressure refrigerant is entered in outdoor heat exchanger 2 (being at this time condenser) and is radiated, and is carried out later by electric expansion valve 4
Low-temp low-pressure gas-liquid two-phase refrigerant is throttled into, refrigerant is formed after indoor heat exchanger 8 (being at this time evaporator) heat absorption evaporation
Low temperature saturated gas returns to compressor 1 and carries out next refrigeration cycle.
It specifically, can be by being arranged in the first of the both ends of electric expansion valve 4 when air-conditioning system is run in a chiller mode
After temperature detecting unit 3 and second temperature detection unit 5 detect the refrigerant temperature T1 before electric expansion valve 4 throttles and throttling respectively
Refrigerant temperature T2, control module 12 can according to electric expansion valve 4 throttle before refrigerant temperature T1 and throttling after refrigerant temperature
Difference DELTA T between T2 judges indoor unit 9 with the presence or absence of throttling device 13, so that whether automatic identification air-conditioning system binodal occurs
The case where stream, avoids system exception caused by double throttle situation, improves the refrigerating capacity of air-conditioning system, promotes user satisfaction.
According to one embodiment of present invention, as shown in Fig. 2, throttling device 13 may include throttle valve component 6 and throttle valve
Core 7.
According to one embodiment of present invention, control module 12 is further used for, the refrigerant temperature T1 before throttling and section
The difference DELTA T between refrigerant temperature T2 after stream judges that indoor unit 9 has throttling device when being less than or equal to preset temperature threshold T
13。
Wherein, preset temperature threshold T can preset in advance in control module 12, for example, 5 DEG C.
That is, control module 12 passes through first after the control of control module 12 air-conditioning system enters refrigeration mode
Temperature detecting unit 3 detects the refrigerant temperature T1 before electric expansion valve 4 throttles, and detects electronics by second temperature detection unit 5
Refrigerant temperature T2 after the throttling of expansion valve 4, and then obtain the refrigerant temperature difference Δ T of the throttling of electric expansion valve 4 front and back.Wherein, such as
Fruit Δ T is less than or equal to preset temperature threshold T, then indoor unit has throttling device 13, illustrates that there are double throttles for air-conditioning system at this time
Phenomenon.
According to one embodiment of present invention, control module 12 is also used to, the refrigerant temperature T1 before throttling and throttling after
Refrigerant temperature T2 between difference DELTA T be greater than preset temperature threshold T when judge indoor unit do not exist throttle device 13.
That is, if Δ T is greater than preset temperature threshold T there is no throttling device 13, illustrate this space-time in indoor unit
Binodal flow phenomenon is not present in adjusting system, controls according to current control mode electric expansion valve.
According to one embodiment of present invention, control module 12 is also used to, judge indoor unit 9 exist throttling device 13 it
Control electric expansion valve 4 is opened to maximum opening afterwards.
That is, control module 12 controls electric expansion valve 4 and opens to most in air-conditioning system there are when binodal flow phenomenon
Big aperture, in other words, the electric expansion valve of air-conditioner outdoor unit 10 only retain the throttling device in indoor unit 9 without throttling action
13 pairs of refrigerants carry out throttling action, so that air-conditioning system be avoided binodal flow phenomenon occur.
To sum up, the control device of the air-conditioning system proposed according to embodiments of the present invention, control module control air-conditioning system with
Refrigeration mode operation, and the refrigerant temperature before electric expansion valve throttles can be obtained by the first temperature detecting unit and by second
Temperature detecting unit obtains the refrigerant temperature after electric expansion valve throttling, and then the refrigerant temperature before throttling according to electric expansion valve
Difference between the refrigerant temperature after throttling judges indoor unit with the presence or absence of throttling device, so that automatic identification air-conditioning system is
It is no the case where double throttle occur, system exception caused by double throttle situation is avoided, the refrigerating capacity of air-conditioning system is improved, promotes user
Satisfaction.
Fig. 3 is the block diagram of air-conditioning system according to an embodiment of the present invention.As shown in figure 3, the air-conditioning system 14 is wrapped
Include the control device 11 of above-mentioned air-conditioning system.
To sum up, the air-conditioning system proposed according to embodiments of the present invention can pass through the control device automatic identification of air-conditioning system
Whether air-conditioning system there is the case where double throttle, avoids system exception caused by double throttle situation, improves the refrigeration of air-conditioning system
Amount promotes user satisfaction.
Fig. 4 is the flow chart of the control method of air-conditioning system according to an embodiment of the present invention.Wherein, the outdoor of air-conditioning system
Machine includes electric expansion valve, as shown in figure 4, the control method of air-conditioning system the following steps are included:
S1: control air-conditioning system is run in a chiller mode.
Wherein, control air-conditioning system is run in a chiller mode in embodiments of the present invention.
It should be noted that when control air-conditioning system is run in a chiller mode, the high temperature and pressure refrigerant of compressor discharge,
It enters in indoor heat exchanger (being at this time condenser) and radiates, throttle into low-temp low-pressure by electric expansion valve later
Gas-liquid two-phase refrigerant, refrigerant form low temperature saturated gas after outdoor heat exchanger (being at this time evaporator) heat absorption evaporation
It returns to compressor and carries out next refrigeration cycle.
S2: the refrigerant temperature T1 before detection electric expansion valve throttling.
S3: the refrigerant temperature T2 after detection electric expansion valve throttling.
It wherein, can be by the way that first temperature detecting unit and second temperature detection unit at the both ends of electric expansion valve be arranged in
Refrigerant temperature T1 before the throttling of the detection electric expansion valve and refrigerant temperature T2 after throttling respectively.
S4: air-conditioning system is judged according to the difference DELTA T between the refrigerant temperature T1 before throttling and the refrigerant temperature T2 after throttling
The indoor unit of system is with the presence or absence of throttling device.
Specifically, refrigerant temperature T1 when air-conditioning system is run in a chiller mode, before being throttled according to electric expansion valve
Difference DELTA T between the refrigerant temperature T2 after throttling judges indoor unit with the presence or absence of throttling device, thus automatic identification air-conditioning
Whether system there is the case where double throttle, avoids system exception caused by double throttle situation, improves the refrigerating capacity of air-conditioning system, mentions
Rise user satisfaction.
According to one embodiment of present invention, if step S4 includes: the refrigerant temperature before throttling and the refrigerant after throttling
Difference between temperature is less than or equal to preset temperature threshold, then judges that indoor unit has throttling device.
Wherein, preset temperature threshold T can preset in advance in control module 12, for example, 5 DEG C.
That is, control air-conditioning system enters after refrigeration mode, it is swollen to detect electronics by the first temperature detecting unit
Refrigerant temperature T1 before swollen valve throttling detects the refrigerant temperature T2 after electric expansion valve throttling by second temperature detection unit,
And then obtain the refrigerant temperature difference Δ T of electric expansion valve throttling front and back.Wherein, if Δ T is less than or equal to preset temperature threshold T,
Then judge that indoor unit has throttling device, illustrates that there are binodal flow phenomenons for air-conditioning system at this time.
According to one embodiment of present invention, step S4 further include: if throttling before refrigerant temperature and throttling after it is cold
Difference between matchmaker's temperature is greater than preset temperature threshold, then judges that indoor unit does not have throttling device.
That is, judging that indoor unit does not have throttling device if Δ T is greater than preset temperature threshold T, illustrating at this time
Binodal flow phenomenon is not present in air-conditioning system, controls according to current control mode electric expansion valve.
According to one embodiment of present invention, step S4 further include: after judging that indoor unit has throttling device, control
Electric expansion valve is opened to maximum opening.
That is, in air-conditioning system there are when binodal flow phenomenon, control electric expansion valve is opened to maximum opening, i.e.,
Speech, for the electric expansion valve of air-conditioner outdoor unit without throttling action, the throttling device only retained in indoor unit saves refrigerant
Stream effect, so that air-conditioning system be avoided binodal flow phenomenon occur.
A specific embodiment according to the present invention, as shown in figure 5, the control method of the air-conditioning system includes following step
It is rapid:
S101: starting, control air-conditioning system booting.
S102: detection air-conditioning system operational mode.
S103: if it is air supply pattern, return step S102.
S104: if it is refrigeration mode, step S105 is executed.
S105: the refrigerant temperature before control the first temperature detecting unit detection electric expansion valve throttling.
S106: the refrigerant temperature after control second temperature detection unit detection electric expansion valve throttling.
S107: the refrigerant temperature difference of throttling front and back is calculated.
S108: judge whether refrigerant temperature difference is greater than preset temperature threshold.
If so, thening follow the steps S109；If not, thening follow the steps S110.
S109: indoor unit is deposited not in throttling device, and electric expansion valve is controlled according to current control mode.
S110: there is throttling device in indoor unit, and control electric expansion valve is opened to maximum opening.
To sum up, the control method of the air-conditioning system proposed according to embodiments of the present invention, control air-conditioning system first is to freeze
Mode operation, the refrigerant temperature before then detecting electric expansion valve throttling, and detect the refrigerant temperature after electric expansion valve throttling
Degree, and then judge that the indoor unit of air-conditioning system is according to the difference between the refrigerant temperature before throttling and the refrigerant temperature after throttling
It is no to be avoided caused by double throttle situation in the presence of throttling device so that whether automatic identification air-conditioning system the case where double throttle occurs
System exception improves the refrigerating capacity of air-conditioning system, promotes user satisfaction.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
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 be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height 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 spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (5)
1. a kind of control device of air-conditioning system, which is characterized in that the outdoor unit of the air-conditioning system includes electric expansion valve, institute
The one end for stating electric expansion valve is connected with the outdoor heat exchanger of the outdoor unit, the other end of the electric expansion valve and the sky
The indoor heat exchanger of the indoor unit of adjusting system is connected, and described device includes:
First temperature detecting unit of one end of the electric expansion valve is set, and first temperature detecting unit is for detecting
Refrigerant temperature before the electric expansion valve throttling；
The second temperature detection unit of the other end of the electric expansion valve is set, and the second temperature detection unit is for examining
Refrigerant temperature after surveying the electric expansion valve throttling；
Control module, the control module respectively with first temperature detecting unit and the second temperature detection unit phase
Even, the control module is run in a chiller mode for controlling the air-conditioning system, and obtains the refrigerant temperature before the throttling
With the refrigerant temperature after the throttling, and according between the refrigerant temperature before the throttling and the refrigerant temperature after the throttling
Difference judge the indoor unit with the presence or absence of throttling device；
Wherein, the control module is further used for, in the refrigerant temperature before the throttling and the refrigerant temperature after the throttling
Between difference judge that the indoor unit has throttling device when being less than or equal to preset temperature threshold；And
Difference between the refrigerant temperature before the throttling and the refrigerant temperature after the throttling is greater than the preset temperature threshold
Judge that the indoor unit does not have throttling device when value.
2. the control device of air-conditioning system according to claim 1, which is characterized in that the control module is also used to,
Judge that the indoor unit controls the electric expansion valve later in the presence of throttling device and opens to maximum opening.
3. a kind of air-conditioning system, which is characterized in that the control including air-conditioning system described according to claim 1 any one of -2
Device.
4. a kind of control method of air-conditioning system, which is characterized in that the outdoor unit of the air-conditioning system includes electric expansion valve, institute
State method the following steps are included:
The air-conditioning system is controlled to run in a chiller mode；
Refrigerant temperature before detecting the electric expansion valve throttling；
Refrigerant temperature after detecting the electric expansion valve throttling；And
The air-conditioning system is judged according to the difference between the refrigerant temperature before the throttling and the refrigerant temperature after the throttling
Indoor unit with the presence or absence of throttling device；
Wherein, described in the difference judgement between the refrigerant temperature after the refrigerant temperature according to before the throttling and the throttling
Indoor unit is with the presence or absence of throttling device, comprising:
If the difference between the refrigerant temperature after refrigerant temperature and the throttling before the throttling is less than or equal to default temperature
Threshold value is spent, then judges that the indoor unit has throttling device；And
If the difference between the refrigerant temperature after refrigerant temperature and the throttling before the throttling is greater than the preset temperature
Threshold value then judges that the indoor unit does not have throttling device.
5. the control method of air-conditioning system according to claim 4, which is characterized in that further include:
After judging that the indoor unit has throttling device, controls the electric expansion valve and open to maximum opening.
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