CN106895557B - Air-conditioning system and its expansion valve control method and control device - Google Patents
Air-conditioning system and its expansion valve control method and control device Download PDFInfo
- Publication number
- CN106895557B CN106895557B CN201710092578.8A CN201710092578A CN106895557B CN 106895557 B CN106895557 B CN 106895557B CN 201710092578 A CN201710092578 A CN 201710092578A CN 106895557 B CN106895557 B CN 106895557B
- Authority
- CN
- China
- Prior art keywords
- adjustment factor
- pressure
- expulsion
- aperture
- expansion valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air-conditioning system and its expansion valve control methods and control device, this method comprises: obtaining the delivery temperature and pressure at expulsion of air-conditioning system；Discharge superheat is obtained according to delivery temperature and the corresponding saturation temperature of pressure at expulsion；Judge whether discharge superheat is less than default degree of superheat threshold value；If discharge superheat is less than default degree of superheat threshold value, further judge whether pressure at expulsion is greater than preset pressure threshold value；If pressure at expulsion is greater than preset pressure threshold value, the first adjustment factor is then obtained according to discharge superheat, and the second adjustment factor is obtained according to pressure at expulsion, and the aperture according to the first adjustment factor and the second adjustment factor variable expansion valve, to, according to the aperture of discharge superheat and the common variable expansion valve of pressure at expulsion, discharge superheat can be made to stablize in normal range (NR), guarantee the compressor reliability service of air-conditioning system, can be avoided expansion valve simultaneously and excessively adjust causes pressure at expulsion excessively high, improves the reliability of air-conditioning system.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of expansion valve control method of air-conditioning system, Yi Zhongkong
The expansion control valve device of adjusting system and a kind of air-conditioning system.
Background technique
In the related art, air-conditioning system usually passes through the aperture control discharge superheat for controlling outer machine expansion valve, for example,
When discharge superheat is lower, reduce the aperture of expansion valve to improve discharge superheat.But the relevant technologies there are the shortcomings that
It is that, when delivery temperature is high and pressure at expulsion is high, since the corresponding saturation temperature of pressure at expulsion increases, may cause and be vented
Temperature is lower, at this point, if according to discharge superheat reduce expansion valve aperture, will lead to delivery temperature and pressure at expulsion into
One step increases, and deteriorates the operating condition of air-conditioning system, influences the reliability of air-conditioning system.
Therefore, the relevant technologies needs improve.
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
One purpose is to propose a kind of expansion valve control method of adjusting system, and this method, which can be avoided expansion valve and excessively adjust, to cause to arrange
Atmospheric pressure is excessively high, improves the reliability of air-conditioning system.
It is another object of the present invention to the expansion control valve devices for proposing a kind of air-conditioning system.Of the invention another
Purpose is to propose a kind of air-conditioning system.
In order to achieve the above objectives, a kind of expansion valve control method for air-conditioning system that one aspect of the present invention embodiment proposes,
The following steps are included: obtaining the delivery temperature and pressure at expulsion of the air-conditioning system；According to the delivery temperature and the exhaust
The corresponding saturation temperature of pressure obtains discharge superheat；Judge whether the discharge superheat is less than default degree of superheat threshold value；Such as
Discharge superheat described in fruit is less than the default degree of superheat threshold value, then further judges whether the pressure at expulsion is greater than default pressure
Force threshold；If the pressure at expulsion is greater than the preset pressure threshold value, first is obtained according to the discharge superheat and is adjusted
Coefficient, and the second adjustment factor is obtained according to the pressure at expulsion, and adjust according to first adjustment factor and second and be
Number adjusts the aperture of the expansion valve.
The expansion valve control method of the air-conditioning system proposed according to embodiments of the present invention obtains the delivery temperature of air-conditioning system
And pressure at expulsion, and discharge superheat is obtained according to delivery temperature and the corresponding saturation temperature of pressure at expulsion, judge discharge superheat
Whether degree is less than default degree of superheat threshold value, if discharge superheat is less than default degree of superheat threshold value, further judges exhaust pressure
Whether power is greater than preset pressure threshold value, if pressure at expulsion is greater than preset pressure threshold value, obtains first according to discharge superheat
Adjustment factor, and the second adjustment factor is obtained according to pressure at expulsion, and according to the first adjustment factor and the second adjustment factor tune
The aperture of expansion valve being saved, thus, according to the aperture of discharge superheat and the common variable expansion valve of pressure at expulsion, can make to be vented
Temperature is stablized in normal range (NR), guarantees the compressor reliability service of air-conditioning system, while can be avoided expansion valve and excessively adjust and leading
It causes pressure at expulsion excessively high, improves the reliability of air-conditioning system.
According to one embodiment of present invention, if the discharge superheat is less than the default degree of superheat threshold value and described
Pressure at expulsion is less than or equal to the preset pressure threshold value, then according to the discharge superheat the first adjustment factor of acquisition, and according to
First adjustment factor adjusts the aperture of the expansion valve.
According to one embodiment of present invention, if the discharge superheat is greater than or equal to the default degree of superheat threshold
Value then obtains third adjustment factor according to the delivery temperature, and adjusts the expansion valve according to the third adjustment factor
Aperture.
According to one embodiment of present invention, the expansion is adjusted according to first adjustment factor and the second adjustment factor
The aperture of valve, comprising: the previous aperture of expansion valve, first adjustment factor are multiplied and are rounded with second adjustment factor
It is used as aperture adjusted afterwards；The aperture of the expansion valve is adjusted according to first adjustment factor, comprising: before expansion valve
One aperture is used as aperture adjusted after being multiplied and be rounded with first adjustment factor；It is adjusted according to the third adjustment factor
The aperture of the expansion valve, comprising: as tune after the previous aperture of expansion valve is multiplied and is rounded with the third adjustment factor
Aperture after whole.
In order to achieve the above objectives, a kind of expansion valve for air-conditioning system that another aspect of the present invention embodiment proposes controls dress
It sets, comprising: temperature detecting unit, the temperature detecting unit are used to detect the delivery temperature of the air-conditioning system；Pressure detecting
Unit, the pressure sensing cell are used to detect the pressure at expulsion of the air-conditioning system；Control unit, described control unit difference
It is connected with the temperature detecting unit and the pressure sensing cell, described control unit is used for according to the delivery temperature and institute
It states the corresponding saturation temperature of pressure at expulsion and obtains discharge superheat, and judge whether the discharge superheat is less than the default degree of superheat
Threshold value further judges whether the pressure at expulsion is big if the discharge superheat is less than the default degree of superheat threshold value
In preset pressure threshold value, if the pressure at expulsion is greater than the preset pressure threshold value, obtained according to the discharge superheat
First adjustment factor, and the second adjustment factor is obtained according to the pressure at expulsion, and according to first adjustment factor and the
Two adjustment factors adjust the aperture of the expansion valve.
The expansion control valve device of the air-conditioning system proposed according to embodiments of the present invention is detected empty by temperature detecting unit
The delivery temperature of adjusting system, and by the pressure at expulsion of pressure sensing cell detection air-conditioning system, control unit is according to exhaust temperature
It spends saturation temperature corresponding with pressure at expulsion and obtains discharge superheat, and judge whether discharge superheat is less than default degree of superheat threshold
Value further judges whether pressure at expulsion is greater than preset pressure threshold value if discharge superheat is less than default degree of superheat threshold value,
If pressure at expulsion is greater than preset pressure threshold value, the first adjustment factor is obtained according to discharge superheat, and according to pressure at expulsion
The second adjustment factor is obtained, and according to the aperture of the first adjustment factor and the second adjustment factor variable expansion valve, thus, according to
The aperture of discharge superheat and the common variable expansion valve of pressure at expulsion can be such that discharge superheat stablizes in normal range (NR), guarantee
The compressor reliability service of air-conditioning system, while can be avoided expansion valve and excessively adjust causes pressure at expulsion excessively high, improves sky
The reliability of adjusting system.
According to one embodiment of present invention, if the discharge superheat is less than the default degree of superheat threshold value and described
Pressure at expulsion is less than or equal to the preset pressure threshold value, and described control unit then obtains first according to the discharge superheat and adjusts
Coefficient, and adjust according to first adjustment factor aperture of the expansion valve.
According to one embodiment of present invention, if the discharge superheat is greater than or equal to the default degree of superheat threshold
Value, described control unit then obtains third adjustment factor according to the delivery temperature, and is adjusted according to the third adjustment factor
The aperture of the expansion valve.
According to one embodiment of present invention, described swollen according to first adjustment factor and the adjusting of the second adjustment factor
When the aperture of swollen valve, described control unit, which adjusts the previous aperture of expansion valve, first adjustment factor and described second, is
Number is used as aperture adjusted after being multiplied and being rounded；When adjusting the aperture of the expansion valve according to first adjustment factor,
Described control unit is used as aperture adjusted after the previous aperture of expansion valve is multiplied and is rounded with first adjustment factor；
When adjusting the aperture of the expansion valve according to the third adjustment factor, described control unit by the previous aperture of expansion valve and
The third adjustment factor is used as aperture adjusted after being multiplied and being rounded.
In order to achieve the above objectives, a kind of air-conditioning system that another aspect of the invention embodiment proposes, including the air-conditioning
The expansion control valve device of system.
The air-conditioning system proposed according to embodiments of the present invention, by the expansion control valve device of above-mentioned air-conditioning system, according to
The aperture of discharge superheat and the common variable expansion valve of pressure at expulsion can be such that discharge superheat stablizes in normal range (NR), guarantee
The compressor reliability service of air-conditioning system, while can be avoided expansion valve and excessively adjust causes pressure at expulsion excessively high, improves sky
The reliability of adjusting system.
Detailed description of the invention
Fig. 1 is the flow chart of the expansion valve control method of air-conditioning system according to an embodiment of the present invention；
Fig. 2 is the flow chart of the expansion valve control method of air-conditioning system according to an embodiment of the invention；
Fig. 3 is the block diagram of the expansion control valve device of air-conditioning system according to an embodiment of the present invention；And
Fig. 4 is the block diagram of air-conditioning system according to an embodiment of the present invention.
Appended drawing reference:
Temperature detecting unit 10, pressure sensing cell 20 and control unit 30；
The expansion control valve device 100 of air-conditioning system 200 and air-conditioning system.
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.
Below with reference to the accompanying drawings the air-conditioning system and its expansion valve control method and control device of the embodiment of the present invention described.
Fig. 1 is the flow chart of the expansion valve control method of air-conditioning system according to an embodiment of the present invention.As shown in Figure 1, empty
The expansion valve control method of adjusting system the following steps are included:
S10: the delivery temperature T and pressure at expulsion P of air-conditioning system are obtained.
Specifically, temperature detecting unit and pressure sensing cell can be arranged in the exhaust outlet of compressor of air-conditioning system,
To obtain the delivery temperature T and pressure at expulsion P of air-conditioning system in real time.
S20: according to delivery temperature T and the corresponding saturation temperature T of pressure at expulsionμObtain discharge superheat σ.
Wherein, discharge superheat σ is equal to delivery temperature T saturation temperature T corresponding with pressure at expulsion PμBetween difference, i.e.,
σ=T-Tμ.In this way, the delivery temperature T and pressure at expulsion P of air-conditioning system are obtained in real time in the operational process of air-conditioning system, with
Calculate corresponding discharge superheat σ.
S30: judge whether discharge superheat σ is less than default degree of superheat threshold value σ0。
S40: if discharge superheat σ is less than default degree of superheat threshold value σ0, then further judge whether pressure at expulsion P is greater than
Preset pressure threshold value P0。
S50: if pressure at expulsion P is greater than preset pressure threshold value P0, then the first adjustment factor is obtained according to discharge superheat σ
K1 (i.e. discharge superheat correction factor), and the second adjustment factor K2 (i.e. pressure correcting coefficient) is obtained according to pressure at expulsion P, with
And the aperture A according to the first adjustment factor K1 and the second adjustment factor K2 variable expansion valve.
Further, according to one embodiment of present invention, if discharge superheat σ is less than default degree of superheat threshold value σ0And
Pressure at expulsion P is less than or equal to preset pressure threshold value P0, then the first adjustment factor K1 is obtained according to discharge superheat σ, and according to the
The aperture A of one adjustment factor K1 variable expansion valve.
According to one embodiment of present invention, if discharge superheat σ is greater than or equal to default degree of superheat threshold value σ0, then root
Third adjustment factor K3 is obtained according to delivery temperature T, and according to the aperture of third adjustment factor K3 variable expansion valve.
Specifically, in the course of work of air-conditioning system, delivery temperature T and pressure at expulsion P is obtained in real time, and then obtain
Then discharge superheat σ first judges whether discharge superheat σ is insufficient and judges whether discharge superheat σ is less than the default degree of superheat
Threshold value σ0If discharge superheat σ is met the requirements, i.e. discharge superheat σ is greater than or equal to default degree of superheat threshold value σ0, then basis
The aperture A of expansion valve is adjusted in delivery temperature T, so that discharge superheat σ is maintained at reasonable range and for example makes to be vented
Temperature σ is maintained at default degree of superheat threshold value σ0Near.
If discharge superheat σ is insufficient, i.e. discharge superheat σ is less than default degree of superheat threshold value σ0, then prejudge whether
It is the deficiency of the degree of superheat caused by exhaust high temperature high pressure, i.e., further judges whether pressure at expulsion P is greater than preset pressure threshold value P0.Such as
Fruit pressure at expulsion P is greater than preset pressure threshold value P0, then explanation is, pressure at expulsion P excessive caused exhaust excessively high by delivery temperature T
The degree of superheat is insufficient, can be according to the aperture A of discharge superheat σ and pressure at expulsion P variable expansion valve；If pressure at expulsion P be less than etc.
In preset pressure threshold value P0, then illustrate not being, pressure at expulsion P excessive caused discharge superheat deficiency excessively high by delivery temperature T,
It can be according to the aperture A of discharge superheat σ variable expansion valve.
It, can delivery temperature T, discharge superheat σ according to air-conditioning system as described above, in one embodiment of the invention
The aperture A of expansion valve is adjusted with the parameter size of pressure at expulsion P, the specific working principle is as follows.
One)
According to one embodiment of present invention, when discharge superheat σ is less than default degree of superheat threshold value σ0And pressure at expulsion P is big
In preset pressure threshold value P0When, the first adjustment factor K1 is obtained according to discharge superheat σ, and obtain second according to pressure at expulsion P
Adjustment factor K2, and the aperture A according to the first adjustment factor K1 and the second adjustment factor K2 variable expansion valve.
According to one embodiment of present invention, according to the first adjustment factor K1 and the second adjustment factor K2 variable expansion valve
Aperture A, comprising: make after the previous aperture A0, the first adjustment factor K1 and the second adjustment factor K2 of expansion valve are multiplied and are rounded
For aperture A ' adjusted, such as A '=ceil (A0*K1*K2).Wherein, function F (x)=ceil (x) is indicated more than or equal to x's
Smallest positive integral value.
It should be noted that the previous aperture A0 of expansion valve can refer to the aperture of expansion valve previous moment.
Specifically, in the course of work of air-conditioning system, if discharge superheat σ is less than default degree of superheat threshold value σ0And
Pressure at expulsion P is greater than preset pressure threshold value P0, then explanation is, the pressure at expulsion P excessive caused degree of superheat excessively high by delivery temperature T
Deficiency, at this point, obtaining the delivery temperature T and pressure at expulsion P of air-conditioning system, in real time to calculate corresponding discharge superheat σ, and root
The first adjustment factor K1 is obtained according to discharge superheat σ, and the second adjustment factor K2 is obtained according to pressure at expulsion P, and will expansion
Previous aperture A0, the first adjustment factor K1 and the second adjustment factor K2 of valve are used as aperture A ' adjusted after being multiplied and being rounded,
Such as aperture A '=ceil (A0*K1*K2) adjusted.
Discharge superheat σ can be divided into 5 sections as shown in table 1 by a specific embodiment according to the present invention, and
Judge the section where discharge superheat σ to obtain corresponding first adjustment factor K1, wherein σ1> σ2> σ3> σ4> σ5>
σ6, K11 > K12 > K13 > K14 > K15.
Table 1
As shown in Table 1, if discharge superheat σ is more than or equal to σ2And it is less than σ1, then the first adjustment factor K1=K11；If
Discharge superheat σ is more than or equal to σ3And it is less than σ2, then the first adjustment factor K1=K12；If discharge superheat σ is more than or equal to σ4
And it is less than σ3, then the first adjustment factor K1=K13；If discharge superheat σ is more than or equal to σ5And it is less than σ4, then first system is adjusted
Number K1=K14；If discharge superheat σ is more than or equal to σ6And it is less than σ5, then the first adjustment factor K1=K15.Wherein, it first adjusts
It saves COEFFICIENT K 1 and discharge superheat σ is positively correlated, in other words, discharge superheat σ is smaller, and the first adjustment factor K1 is smaller,
In this way, can the range according to locating for discharge superheat σ obtain corresponding first adjustment factor K1, for example, when exhaust
Degree of superheat σ, which is in, is more than or equal to σ3And it is less than σ2Range when, the first adjustment factor K1 can be chosen for K12, to improve air-conditioning system
Delivery temperature T, and then improve discharge superheat σ.
Pressure at expulsion P can be divided into 5 sections as shown in table 2 by another specific embodiment according to the present invention, and
Judge the section where pressure at expulsion P to obtain corresponding second adjustment factor K2, wherein P1> P2> P3> P4> P5> P6,
K21 > K22 > K23 > K24 > K25.
Table 2
| The range of pressure at expulsion P | P1> P >=P2 | P2> P >=P3 | P3> P >=P4 | P4> P >=P5 | P5> P >=P6 |
| Second adjustment factor K2 | K21 | K22 | K23 | K24 | K25 |
As shown in Table 2, if pressure at expulsion P is more than or equal to P2And it is less than P1, then the second adjustment factor K2=K21；If row
Atmospheric pressure P is more than or equal to P3And it is less than P2, then the second adjustment factor K2=K22；If pressure at expulsion P is more than or equal to P4And it is less than
P3, then the second adjustment factor K2=K23；If pressure at expulsion P is more than or equal to P5And it is less than P4, then the second adjustment factor K2=
K24；If pressure at expulsion P is more than or equal to P6And it is less than P5, then the second adjustment factor K2=K25.Wherein, the second adjustment factor K2
It is positively correlated with pressure at expulsion P, in other words, pressure at expulsion P is bigger, and the second adjustment factor K2 is bigger.
In this way, can the range according to locating for pressure at expulsion P obtain corresponding second adjustment factor K2, for example, working as exhaust pressure
Power P, which is in, is more than or equal to P3And it is less than P2Range when, the second adjustment factor K2 can be chosen for K22, to avoid the excessive of expansion valve
Adjusting causes pressure at expulsion P excessively high.
As described above, when discharge superheat σ is less than default degree of superheat threshold value σ0And pressure at expulsion P is greater than preset pressure threshold value
P0When, explanation is, pressure at expulsion P excessive caused discharge superheat deficiency excessively high by delivery temperature T, can be according to discharge superheat
σ and pressure at expulsion P, and the data in Tables 1 and 2 is combined to obtain corresponding first adjustment factor K1 and the second adjustment factor respectively
K2 is adjusted with the aperture A to expansion valve, it is assumed that the first adjustment factor K1=K11 got, and the second adjustment factor K2
=K21, then aperture A '=ceil (A0*K11*K21) adjusted.
The expansion valve control method of the air-conditioning system of the embodiment of the present invention is total according to discharge superheat and pressure at expulsion as a result,
With the aperture of variable expansion valve, discharge superheat can be made to stablize in normal range (NR), guarantee that the compressor of air-conditioning system is reliably transported
Row, causes pressure at expulsion excessively high, improves the reliability of air-conditioning system meanwhile, it is capable to which expansion valve is avoided excessively to adjust.
Two)
According to one embodiment of present invention, if discharge superheat σ is less than default degree of superheat threshold value σ0And pressure at expulsion P
Less than or equal to preset pressure threshold value P0, then the first adjustment factor K1 is obtained according to discharge superheat σ, and according to the first adjustment factor
The aperture A of K1 variable expansion valve.
According to one embodiment of present invention, according to the aperture A of the first adjustment factor K1 variable expansion valve, comprising: will be swollen
The previous aperture A0 and the first adjustment factor K1 of swollen valve are used as aperture A ' adjusted, such as A '=ceil after being multiplied and being rounded
(A0*K1)。
Specifically, in the course of work of air-conditioning system, if discharge superheat σ is less than default degree of superheat threshold value σ0And
Pressure at expulsion P is less than or equal to preset pressure threshold value P0, then illustrate it is not caused by, pressure at expulsion P excessively high by delivery temperature T excessive
Discharge superheat is insufficient, at this point, can obtain the first adjustment factor K1, and root according to discharge superheat σ in conjunction with the data in table 1
According to the aperture A of the first adjustment factor K1 variable expansion valve, it is assumed that the first adjustment factor K1=K11 got, then it is adjusted
Aperture A '=ceil (A0*K11) of expansion valve.
Three)
According to one embodiment of present invention, if discharge superheat σ is greater than or equal to default degree of superheat threshold value σ0, then root
Third adjustment factor K3 is obtained according to delivery temperature T, and according to the aperture A of third adjustment factor K3 variable expansion valve.
According to one embodiment of present invention, according to the aperture A of third adjustment factor K3 variable expansion valve, comprising: will be swollen
The previous aperture A0 of swollen valve is used as aperture A ' adjusted, such as A '=ceil after being multiplied and be rounded with third adjustment factor K3
(A0*K3)。
Specifically, in the course of work of air-conditioning system, if discharge superheat σ is greater than or equal to default degree of superheat threshold
Value σ0, then illustrate that discharge superheat σ is normal, at this point, third adjustment factor K3 can be obtained according to delivery temperature T, and expansion valve
Previous aperture A0 is used as aperture A ' adjusted, the aperture of expansion valve adjusted after being multiplied and be rounded with third adjustment factor K3
A '=ceil (A0*K3).
Delivery temperature T can be divided into 5 sections, and sentence as shown in table 3 by a specific embodiment according to the present invention
Section where disconnected delivery temperature T is to obtain corresponding third adjustment factor K3, wherein T1> T2> T3> T4> T5> T6, K31
> K32 > K33 > K34 > K35.
Table 3
| The range of delivery temperature T | T1> T >=T2 | T2> T >=T3 | T3> T >=T4 | T4> T >=T5 | T5> T >=T6 |
| Third adjustment factor K3 | K31 | K32 | K33 | K34 | K35 |
As shown in Table 3, if delivery temperature T is more than or equal to T2And it is less than T1, then third adjustment factor K3=K31；If row
Temperature degree T is more than or equal to T3And it is less than T2, then third adjustment factor K3=K32；If delivery temperature T is more than or equal to T4And it is less than
T3, then third adjustment factor K3=K33；If delivery temperature T is more than or equal to T5And it is less than T4, then third adjustment factor K3=
K34；If delivery temperature T is more than or equal to T6And it is less than T5, then third adjustment factor K3=K35.Wherein, third adjustment factor K3
It is positively correlated with delivery temperature T, in other words, delivery temperature T is bigger, and third adjustment factor K3 is bigger.
In this way, being greater than or equal to default degree of superheat threshold value σ in discharge superheat σ0It, can basis when i.e. discharge superheat is normal
Range locating for delivery temperature T obtains corresponding third adjustment factor K3, for example, when delivery temperature T is more than or equal to T3And it is less than T2
When, third adjustment factor K3 can be chosen for K32, and according to the aperture A of third adjustment factor K3 variable expansion valve, so as to be vented
Temperature σ is maintained at default degree of superheat threshold value σ0Near, and then guarantee the stable operation of the compressor of air-conditioning system.
As described above, as shown in Fig. 2, the air-conditioning system expansion valve control method of the embodiment of the present invention specifically includes following step
It is rapid:
S101: the delivery temperature T and pressure at expulsion P of air-conditioning system are obtained in real time.
S102: according to delivery temperature T and the corresponding saturation temperature T of pressure at expulsionμObtain discharge superheat σ.
S103: judge whether discharge superheat σ is less than default degree of superheat threshold value σ0。
If so, thening follow the steps S105；If not, thening follow the steps S104.
S104: third adjustment factor K3 is obtained according to delivery temperature T, and the previous aperture A0 and third of expansion valve are adjusted
COEFFICIENT K 3 is used as aperture A ' adjusted, such as A '=ceil (A0*K3) after being multiplied and being rounded.
S105: judge whether pressure at expulsion P is greater than preset pressure threshold value P0。
If so, thening follow the steps S106；If not, thening follow the steps S107.
S106: the first adjustment factor K1 is obtained according to discharge superheat σ, and obtains second according to pressure at expulsion P and adjusts and be
Number K2, and conduct after the previous aperture A0, the first adjustment factor K1 and the second adjustment factor K2 of expansion valve are multiplied and are rounded
Aperture A ' adjusted, such as A '=ceil (A0*K1*K2).
S107: the first adjustment factor K1 is obtained according to discharge superheat σ, and the previous aperture A0 of expansion valve and first is adjusted
Section COEFFICIENT K 1 is used as aperture A ' adjusted, such as A '=ceil (A0*K1) after being multiplied and being rounded.
To sum up, the expansion valve control method of the air-conditioning system proposed according to embodiments of the present invention obtains the row of air-conditioning system
Temperature degree and pressure at expulsion, and discharge superheat is obtained according to delivery temperature and the corresponding saturation temperature of pressure at expulsion, judge to arrange
Whether the gas degree of superheat is less than default degree of superheat threshold value, if discharge superheat is less than default degree of superheat threshold value, further judges
Whether pressure at expulsion is greater than preset pressure threshold value, if pressure at expulsion is greater than preset pressure threshold value, is obtained according to discharge superheat
The first adjustment factor is taken, and the second adjustment factor is obtained according to pressure at expulsion, and adjust according to the first adjustment factor and second
The aperture of coefficient adjustment expansion valve, thus, according to the aperture of discharge superheat and the common variable expansion valve of pressure at expulsion, can make
Discharge superheat is stablized in normal range (NR), guarantees the compressor reliability service of air-conditioning system, while it is excessive to can be avoided expansion valve
Adjusting causes pressure at expulsion excessively high, improves the reliability of air-conditioning system.
Fig. 3 is the block diagram of the expansion control valve device of air-conditioning system according to an embodiment of the present invention.Such as Fig. 3 institute
Show, the expansion control valve device of air-conditioning system includes: temperature detecting unit 10, pressure sensing cell 20 and control unit 30.
Wherein, temperature detecting unit 10 is used to detect the delivery temperature T of air-conditioning system；Pressure sensing cell 20 is for detecting
The pressure at expulsion P of air-conditioning system；Control unit 30 is connected with temperature detecting unit 10 and pressure sensing cell 20 respectively, and control is single
Member 30 judges discharge superheat for obtaining discharge superheat σ according to the corresponding saturation temperature of delivery temperature T and pressure at expulsion P
Whether degree σ is less than default degree of superheat threshold value σ0If discharge superheat σ is less than default degree of superheat threshold value σ0, then further judgement is arranged
Whether atmospheric pressure P is greater than preset pressure threshold value P0If pressure at expulsion P is greater than preset pressure threshold value P0, then according to discharge superheat
σ obtains the first adjustment factor K1, and obtains the second adjustment factor K2 according to pressure at expulsion P, and according to the first adjustment factor K1
With the aperture A of the second adjustment factor K2 variable expansion valve.
Further, according to one embodiment of present invention, if discharge superheat σ is less than default degree of superheat threshold value σ0And
Pressure at expulsion P is less than or equal to preset pressure threshold value P0, control unit 30 is then according to discharge superheat σ the first adjustment factor of acquisition
K1, and according to the aperture A of the first adjustment factor K1 variable expansion valve.
According to one embodiment of present invention, if discharge superheat σ is greater than or equal to default degree of superheat threshold value σ0, control
Unit 30 then obtains third adjustment factor K3 according to delivery temperature T, and according to the aperture of third adjustment factor K3 variable expansion valve.
Specifically, temperature detecting unit 10 and pressure sensing cell 20 can be arranged in the compressor air-discharging of air-conditioning system
Mouthful, to obtain the delivery temperature T and pressure at expulsion P of air-conditioning system in real time, control unit 30 is according to delivery temperature T and pressure at expulsion
The corresponding saturation temperature T of PμObtain discharge superheat σ, wherein it is corresponding with pressure at expulsion P that discharge superheat σ is equal to delivery temperature T
Saturation temperature TμBetween difference, i.e. σ=T-Tμ。
In the course of work of air-conditioning system, control unit 30 obtains delivery temperature T and pressure at expulsion P in real time, and then obtains
Discharge superheat σ is taken, then first judges whether discharge superheat σ is insufficient and judges whether discharge superheat σ is less than default overheat
Spend threshold value σ0If discharge superheat σ is met the requirements, i.e. discharge superheat σ is greater than or equal to default degree of superheat threshold value σ0, control
Unit 30 is then adjusted according to aperture A of the delivery temperature T to expansion valve, so that discharge superheat σ is maintained at reasonable range
Such as discharge superheat σ is made to be maintained at default degree of superheat threshold value σ0Near.
If discharge superheat σ is insufficient, i.e. discharge superheat σ is less than default degree of superheat threshold value σ0, control unit 30 is then pre-
First judge whether it is the deficiency of the degree of superheat caused by exhaust high temperature high pressure, i.e., further judges whether pressure at expulsion P is greater than default pressure
Force threshold P0.If pressure at expulsion P is greater than preset pressure threshold value P0, then explanation is, pressure at expulsion P excessively high by delivery temperature T excessive
Caused discharge superheat is insufficient, and control unit 30 can be according to the aperture A of discharge superheat σ and pressure at expulsion P variable expansion valve；
If pressure at expulsion P is less than or equal to preset pressure threshold value P0, then illustrate be not it is excessively high by delivery temperature T, pressure at expulsion P is excessive draws
The discharge superheat risen is insufficient, and control unit 30 can be according to the aperture A of discharge superheat σ variable expansion valve.
As described above, in one embodiment of the invention, control unit 30 can according to the delivery temperature T of air-conditioning system,
The aperture A of expansion valve is adjusted in the parameter size of discharge superheat σ and pressure at expulsion P, and the specific working principle is as follows.
One)
According to one embodiment of present invention, when discharge superheat σ is less than default degree of superheat threshold value σ0And pressure at expulsion P is big
In preset pressure threshold value P0When, control unit 30 obtains the first adjustment factor K1 according to discharge superheat σ, and according to pressure at expulsion
P obtains the second adjustment factor K2, and the aperture A according to the first adjustment factor K1 and the second adjustment factor K2 variable expansion valve.
According to one embodiment of present invention, according to the first adjustment factor K1 and the second adjustment factor K2 variable expansion valve
Aperture when, the previous aperture A0, the first adjustment factor K1 and the second adjustment factor K2 of expansion valve are multiplied simultaneously by control unit 30
Aperture A ' adjusted is used as after rounding.
It should be noted that the previous aperture A0 of expansion valve can refer to the aperture of expansion valve previous moment.
Specifically, in the course of work of air-conditioning system, if discharge superheat σ is less than default degree of superheat threshold value σ0And
Pressure at expulsion P is greater than preset pressure threshold value P0, then explanation is, the pressure at expulsion P excessive caused degree of superheat excessively high by delivery temperature T
Deficiency, at this point, temperature detecting unit 10 obtains the delivery temperature T of air-conditioning system in real time, pressure sensing cell 20 obtains empty in real time
The pressure at expulsion P of adjusting system, control unit 30 calculate corresponding discharge superheat σ according to delivery temperature T and pressure at expulsion P, and
The first adjustment factor K1 is obtained according to discharge superheat σ, and the second adjustment factor K2 is obtained according to pressure at expulsion P, and will be swollen
Previous aperture A0, the first adjustment factor K1 and the second adjustment factor K2 of swollen valve are used as aperture adjusted after being multiplied and being rounded
A ', such as aperture A '=ceil (A0*K1*K2) adjusted.
Discharge superheat σ can be divided into 5 sections as shown in table 1 by a specific embodiment according to the present invention, and
Judge the section where discharge superheat σ to obtain corresponding first adjustment factor K1, wherein σ1> σ2> σ3> σ4> σ5>
σ6, K11 > K12 > K13 > K14 > K15.
Table 1
As shown in Table 1, if discharge superheat σ is more than or equal to σ2And it is less than σ1, then the first adjustment factor K1=K11；If
Discharge superheat σ is more than or equal to σ3And it is less than σ2, then the first adjustment factor K1=K12；If discharge superheat σ is more than or equal to σ4
And it is less than σ3, then the first adjustment factor K1=K13；If discharge superheat σ is more than or equal to σ5And it is less than σ4, then first system is adjusted
Number K1=K14；If discharge superheat σ is more than or equal to σ6And it is less than σ5, then the first adjustment factor K1=K15.Wherein, it first adjusts
It saves COEFFICIENT K 1 and discharge superheat σ is positively correlated, in other words, discharge superheat σ is smaller, and the first adjustment factor K1 is smaller.
In this way, control unit 30 can the range according to locating for discharge superheat σ obtain corresponding first adjustment factor K1, example
Such as, it is more than or equal to σ when discharge superheat σ is in3And it is less than σ2Range when, the first adjustment factor K1 can be chosen for K12, to mention
The delivery temperature T of high air-conditioning system, and then improve discharge superheat σ.
Pressure at expulsion P can be divided into 5 sections as shown in table 2 by another specific embodiment according to the present invention, and
Judge the section where pressure at expulsion P to obtain corresponding second adjustment factor K2, wherein P1> P2> P3> P4> P5> P6,
K21 > K22 > K23 > K24 > K25.
Table 2
| The range of pressure at expulsion P | P1> P >=P2 | P2> P >=P3 | P3> P >=P4 | P4> P >=P5 | P5> P >=P6 |
| Second adjustment factor K2 | K21 | K22 | K23 | K24 | K25 |
As shown in Table 2, if pressure at expulsion P is more than or equal to P2And it is less than P1, then the second adjustment factor K2=K21；If row
Atmospheric pressure P is more than or equal to P3And it is less than P2, then the second adjustment factor K2=K22；If pressure at expulsion P is more than or equal to P4And it is less than
P3, then the second adjustment factor K2=K23；If pressure at expulsion P is more than or equal to P5And it is less than P4, then the second adjustment factor K2=
K24；If pressure at expulsion P is more than or equal to P6And it is less than P5, then the second adjustment factor K2=K25.Wherein, the second adjustment factor K2
It is positively correlated with pressure at expulsion P, in other words, pressure at expulsion P is bigger, and the second adjustment factor K2 is bigger.
In this way, control unit 30 can the range according to locating for pressure at expulsion P obtain corresponding second adjustment factor K2, example
Such as, it is more than or equal to P when pressure at expulsion P is in3And it is less than P2Range when, the second adjustment factor K2 can be chosen for K22, to avoid
The excessive adjusting of expansion valve causes pressure at expulsion P excessively high.
As described above, when discharge superheat σ is less than default degree of superheat threshold value σ0And pressure at expulsion P is greater than preset pressure threshold value
P0When, explanation is, pressure at expulsion P excessive caused discharge superheat deficiency excessively high by delivery temperature T, and control unit 30 can be real-time
Discharge superheat σ and pressure at expulsion P is obtained, and the data in Tables 1 and 2 is combined to obtain corresponding first adjustment factor K1 respectively
With the second adjustment factor K2, it is adjusted with the aperture A to expansion valve, it is assumed that the first adjustment factor K1=K11 got, and
Second adjustment factor K2=K21, then aperture A '=ceil (A0*K11*K21) adjusted.
The expansion valve control method of the air-conditioning system of the embodiment of the present invention is total according to discharge superheat and pressure at expulsion as a result,
With the aperture of variable expansion valve, discharge superheat can be made to stablize in normal range (NR), guarantee that the compressor of air-conditioning system is reliably transported
Row, causes pressure at expulsion excessively high, improves the reliability of air-conditioning system meanwhile, it is capable to which expansion valve is avoided excessively to adjust.
Two)
According to one embodiment of present invention, if discharge superheat σ is less than default degree of superheat threshold value and pressure at expulsion P is small
In being equal to preset pressure threshold value, control unit 30 then obtains the first adjustment factor K1 according to discharge superheat σ, and adjusts according to first
Save the aperture of 1 variable expansion valve of COEFFICIENT K.
According to one embodiment of present invention, when according to the aperture of the first adjustment factor K1 variable expansion valve, control is single
Member 30 is used as aperture adjusted after the previous aperture of expansion valve is multiplied and is rounded with the first adjustment factor K1.
Specifically, in the course of work of air-conditioning system, if discharge superheat σ is less than default degree of superheat threshold value σ0And
Pressure at expulsion P is less than or equal to preset pressure threshold value P0, then illustrate it is not caused by, pressure at expulsion P excessively high by delivery temperature T excessive
Discharge superheat is insufficient, at this point, control unit 30 can obtain first and adjust according to discharge superheat σ is in conjunction with the data in table 1
Number K1, and according to the aperture A of the first adjustment factor K1 variable expansion valve, it is assumed that the first adjustment factor K1=K11 got, then
Aperture A '=ceil (A0*K11) of expansion valve adjusted.
Three)
According to one embodiment of present invention, discharge superheat σ is greater than or equal to default degree of superheat threshold value, control unit 30
Third adjustment factor K3 is then obtained according to delivery temperature T, and according to the aperture of third adjustment factor K3 variable expansion valve.
According to one embodiment of present invention, when according to the aperture of third adjustment factor K3 variable expansion valve, control is single
Member 30 is used as aperture adjusted after the previous aperture of expansion valve is multiplied and is rounded with third adjustment factor K3.
Specifically, in the course of work of air-conditioning system, if discharge superheat σ is greater than or equal to default degree of superheat threshold
Value σ0, then illustrate that discharge superheat σ is normal, at this point, control unit 30 can obtain third adjustment factor K3 according to delivery temperature T,
And the previous aperture A0 of expansion valve be multiplied and be rounded with third adjustment factor K3 after as aperture A ' adjusted, it is adjusted swollen
Aperture A '=ceil (A0*K3) of swollen valve.
Delivery temperature T can be divided into 5 sections, and sentence as shown in table 3 by a specific embodiment according to the present invention
Section where disconnected delivery temperature T is to obtain corresponding third adjustment factor K3, wherein T1> T2> T3> T4> T5> T6, K31
> K32 > K33 > K34 > K35.
Table 3
| The range of delivery temperature T | T1> T >=T2 | T2> T >=T3 | T3> T >=T4 | T4> T >=T5 | T5> T >=T6 |
| Third adjustment factor K3 | K31 | K32 | K33 | K34 | K35 |
As shown in Table 3, if delivery temperature T is more than or equal to T2And it is less than T1, then third adjustment factor K3=K31；If row
Temperature degree T is more than or equal to T3And it is less than T2, then third adjustment factor K3=K32；If delivery temperature T is more than or equal to T4And it is less than
T3, then third adjustment factor K3=K33；If delivery temperature T is more than or equal to T5And it is less than T4, then third adjustment factor K3=
K34；If delivery temperature T is more than or equal to T6And it is less than T5, then third adjustment factor K3=K35.Wherein, third adjustment factor K3
It is positively correlated with delivery temperature T, in other words, delivery temperature T is bigger, and third adjustment factor K3 is bigger.
In this way, being greater than or equal to default degree of superheat threshold value σ in discharge superheat σ0When i.e. discharge superheat is normal, control is single
Member 30 can the range according to locating for delivery temperature T obtain corresponding third adjustment factor K3, for example, when delivery temperature T is greater than etc.
In T3And it is less than T2When, third adjustment factor K3 can be chosen for K32, and according to the aperture of third adjustment factor K3 variable expansion valve
A, so that discharge superheat σ is maintained at default degree of superheat threshold value σ0Near, and then guarantee that the stablizing for compressor of air-conditioning system is transported
Row.
As described above, the course of work of the expansion control valve device of air-conditioning system according to an embodiment of the present invention is as follows:
When discharge superheat σ is more than or equal to default degree of superheat threshold value σ0When i.e. discharge superheat σ is normal, control unit 30
According to the aperture of delivery temperature T variable expansion valve.When discharge superheat σ is less than default degree of superheat threshold value σ0That is discharge superheat σ is not
When sufficient, control unit 30 first judges whether pressure at expulsion P is greater than preset pressure threshold value P0First judge whether to be by delivery temperature
Excessively high, the excessive caused discharge superheat σ deficiency of pressure at expulsion, if pressure at expulsion P is greater than preset pressure threshold value P0Be by
Discharge superheat σ caused by excessive discharge temperature, pressure at expulsion are excessive is insufficient, and control unit 30 is then obtained according to discharge superheat σ
Take the first adjustment factor K1, and after the previous aperture A0 of expansion valve and the first adjustment factor K1 are multiplied and are rounded as adjustment after
Aperture A ', such as A '=ceil (A0*K1)；If pressure at expulsion P is less than or equal to preset pressure threshold value P0It is not by being vented
Discharge superheat σ caused by temperature is excessively high, pressure at expulsion is excessive is insufficient, and control unit 30 then obtains the according to discharge superheat σ
One adjustment factor K1, and the second adjustment factor K2 is obtained according to pressure at expulsion P, and by the previous aperture A0 of expansion valve, first
Adjustment factor K1 and the second adjustment factor K2 is used as aperture A ' adjusted, such as A '=ceil (A0*K1* after being multiplied and being rounded
K2)。
To sum up, the expansion control valve device of the air-conditioning system proposed according to embodiments of the present invention, passes through temperature detecting unit
Detect air-conditioning system delivery temperature, and by pressure sensing cell detection air-conditioning system pressure at expulsion, control unit according to
Delivery temperature and the corresponding saturation temperature of pressure at expulsion obtain discharge superheat, and judge whether discharge superheat is less than and preset
Heat degree threshold further judges whether pressure at expulsion is greater than default pressure if discharge superheat is less than default degree of superheat threshold value
Force threshold obtains the first adjustment factor according to discharge superheat, and according to row if pressure at expulsion is greater than preset pressure threshold value
Atmospheric pressure obtains the second adjustment factor, and according to the aperture of the first adjustment factor and the second adjustment factor variable expansion valve, from
And according to the aperture of discharge superheat and the common variable expansion valve of pressure at expulsion, discharge superheat can be made to stablize in normal model
It encloses, guarantees the compressor reliability service of air-conditioning system, while can be avoided expansion valve and excessively adjust causes pressure at expulsion excessively high, mentions
The high reliability of air-conditioning system.
Fig. 4 is the block diagram of air-conditioning system according to an embodiment of the present invention.As shown in figure 4, air-conditioning system 200 includes
The expansion control valve device 100 of air-conditioning system.
To sum up, the air-conditioning system proposed according to embodiments of the present invention, by the expansion control valve device of above-mentioned air-conditioning system,
According to the aperture of discharge superheat and the common variable expansion valve of pressure at expulsion, discharge superheat can be made to stablize in normal range (NR),
Guarantee the compressor reliability service of air-conditioning system, while can be avoided expansion valve and excessively adjust causes pressure at expulsion excessively high, improves
The reliability of air-conditioning system.
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 (9)
1. a kind of expansion valve control method of air-conditioning system, which comprises the following steps:
Obtain the delivery temperature and pressure at expulsion of the air-conditioning system；
Discharge superheat is obtained according to the delivery temperature and the corresponding saturation temperature of the pressure at expulsion；
Judge whether the discharge superheat is less than default degree of superheat threshold value；
If the discharge superheat is less than the default degree of superheat threshold value, further judge whether the pressure at expulsion is greater than
Preset pressure threshold value；
If the pressure at expulsion is greater than the preset pressure threshold value, first is obtained according to the discharge superheat and adjusts system
Number, and the second adjustment factor is obtained according to the pressure at expulsion, and according to first adjustment factor and the second adjustment factor
Adjust the aperture of the expansion valve；
Wherein, the aperture of the expansion valve is adjusted according to first adjustment factor and the second adjustment factor, comprising: by expansion valve
Previous aperture, first adjustment factor be multiplied and be rounded with second adjustment factor after as aperture adjusted.
2. the expansion valve control method of air-conditioning system according to claim 1, which is characterized in that
If the discharge superheat is less than the default degree of superheat threshold value and the pressure at expulsion is less than or equal to the default pressure
Force threshold then obtains the first adjustment factor according to the discharge superheat, and described swollen according to first adjustment factor adjusting
The aperture of swollen valve.
3. the expansion valve control method of air-conditioning system according to claim 2, which is characterized in that
If the discharge superheat is greater than or equal to the default degree of superheat threshold value, third is obtained according to the delivery temperature
Adjustment factor, and adjust according to the third adjustment factor aperture of the expansion valve.
4. the expansion valve control method of air-conditioning system according to claim 3, which is characterized in that
The aperture of the expansion valve is adjusted according to first adjustment factor, comprising: by the previous aperture of expansion valve and described
One adjustment factor is used as aperture adjusted after being multiplied and being rounded；
The aperture of the expansion valve is adjusted according to the third adjustment factor, comprising: by the previous aperture of expansion valve and described
Three adjustment factors are used as aperture adjusted after being multiplied and being rounded.
5. a kind of expansion control valve device of air-conditioning system characterized by comprising
Temperature detecting unit, the temperature detecting unit are used to detect the delivery temperature of the air-conditioning system；
Pressure sensing cell, the pressure sensing cell are used to detect the pressure at expulsion of the air-conditioning system；
Control unit, described control unit are connected with the temperature detecting unit and the pressure sensing cell respectively, the control
Unit processed is used to obtain discharge superheat according to the delivery temperature and the corresponding saturation temperature of the pressure at expulsion, and judges institute
State whether discharge superheat is less than default degree of superheat threshold value, if the discharge superheat is less than the default degree of superheat threshold value,
Then further judge whether the pressure at expulsion is greater than preset pressure threshold value, if the pressure at expulsion is greater than the preset pressure
Threshold value then obtains the first adjustment factor according to the discharge superheat, and obtains the second adjustment factor according to the pressure at expulsion,
And the aperture of the expansion valve is adjusted according to first adjustment factor and the second adjustment factor, wherein according to described
When one adjustment factor and the second adjustment factor adjust the aperture of the expansion valve, described control unit opens the previous of expansion valve
Degree, first adjustment factor are used as aperture adjusted after being multiplied and be rounded with second adjustment factor.
6. the expansion control valve device of air-conditioning system according to claim 5, which is characterized in that
If the discharge superheat is less than the default degree of superheat threshold value and the pressure at expulsion is less than or equal to the default pressure
Force threshold, described control unit then obtains the first adjustment factor according to the discharge superheat, and adjusts according to described first and be
Number adjusts the aperture of the expansion valve.
7. the expansion control valve device of air-conditioning system according to claim 6, which is characterized in that
If the discharge superheat is greater than or equal to the default degree of superheat threshold value, according to the exhaust if described control unit
Temperature obtains third adjustment factor, and the aperture of the expansion valve is adjusted according to the third adjustment factor.
8. the expansion control valve device of air-conditioning system according to claim 7, which is characterized in that wherein,
When adjusting the aperture of the expansion valve according to first adjustment factor, described control unit opens the previous of expansion valve
Degree is used as aperture adjusted after being multiplied and be rounded with first adjustment factor；
When adjusting the aperture of the expansion valve according to the third adjustment factor, described control unit opens the previous of expansion valve
Degree is used as aperture adjusted after being multiplied and be rounded with the third adjustment factor.
9. a kind of air-conditioning system, which is characterized in that the expansion including the air-conditioning system according to any one of claim 5-8
Control valve device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092578.8A CN106895557B (en) | 2017-02-21 | 2017-02-21 | Air-conditioning system and its expansion valve control method and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092578.8A CN106895557B (en) | 2017-02-21 | 2017-02-21 | Air-conditioning system and its expansion valve control method and control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106895557A CN106895557A (en) | 2017-06-27 |
| CN106895557B true CN106895557B (en) | 2019-10-01 |
Family
ID=59185523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710092578.8A Active CN106895557B (en) | 2017-02-21 | 2017-02-21 | Air-conditioning system and its expansion valve control method and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106895557B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2932195T3 (en) | 2017-09-18 | 2023-01-16 | Gd Midea Heating & Ventilating Equipment Co Ltd | Control method of a multi-split air conditioner, a multi-split air conditioning system and a computer-readable storage medium |
| CN107655166B (en) * | 2017-09-18 | 2020-05-22 | 广东美的暖通设备有限公司 | Control method and system of multi-connected air conditioner and computer readable storage medium |
| CN107906813A (en) * | 2017-10-31 | 2018-04-13 | 广东美的暖通设备有限公司 | The control method and air conditioner of air conditioner |
| CN107906671B (en) * | 2017-10-31 | 2020-08-07 | 广东美的暖通设备有限公司 | Refrigerant quantity judging method and system |
| CN107906672B (en) * | 2017-10-31 | 2020-03-10 | 广东美的暖通设备有限公司 | Refrigerant quantity judging method and system |
| CN109386996A (en) * | 2018-10-08 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of control method and air-conditioning system of electric expansion valve |
| CN109855281B (en) * | 2018-12-12 | 2021-05-28 | 青岛海信日立空调系统有限公司 | Air conditioner heat exchange device and air conditioner |
| CN110822671B (en) * | 2019-10-31 | 2021-02-26 | 广东志高暖通设备股份有限公司 | Control method for electronic expansion valve of multi-split outdoor unit |
| CN110779146B (en) * | 2019-11-12 | 2020-11-13 | 珠海格力电器股份有限公司 | Air conditioner and electronic expansion valve control method thereof, storage medium and computer equipment |
| CN110848903B (en) * | 2019-11-20 | 2021-05-18 | 宁波奥克斯电气股份有限公司 | Air conditioner exhaust fluctuation control method and device, air conditioner and storage medium |
| CN111023455B (en) * | 2019-12-26 | 2021-08-03 | Tcl空调器(中山)有限公司 | Defrosting control method, defrosting control device, air conditioner and readable storage medium |
| CN111322801B (en) * | 2020-02-27 | 2021-05-11 | 广东志高暖通设备股份有限公司 | Control method and device of electronic expansion valve |
| CN113739379B (en) * | 2020-05-29 | 2022-09-27 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN113108439B (en) * | 2021-05-20 | 2021-10-08 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and storage medium |
| CN114294807A (en) * | 2022-01-11 | 2022-04-08 | 珠海格力电器股份有限公司 | Air conditioning unit, storage medium and control method of air conditioning unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617804A (en) * | 1985-01-30 | 1986-10-21 | Hitachi, Ltd. | Refrigerant flow control device |
| JP2002228282A (en) * | 2001-01-29 | 2002-08-14 | Matsushita Electric Ind Co Ltd | Refrigerating device |
| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN104110367A (en) * | 2013-04-22 | 2014-10-22 | 合肥美的暖通设备有限公司 | Low-pressure-chamber compressor system and superheat degree control method thereof and outdoor unit |
| CN105627613A (en) * | 2016-01-04 | 2016-06-01 | 广东美的暖通设备有限公司 | Outdoor unit for air conditioner and air conditioner |
| CN106196495A (en) * | 2016-08-08 | 2016-12-07 | 珠海格力电器股份有限公司 | Control device, control method and the multi-gang air-conditioner of a kind of multi-gang air-conditioner |
-
2017
- 2017-02-21 CN CN201710092578.8A patent/CN106895557B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617804A (en) * | 1985-01-30 | 1986-10-21 | Hitachi, Ltd. | Refrigerant flow control device |
| JP2002228282A (en) * | 2001-01-29 | 2002-08-14 | Matsushita Electric Ind Co Ltd | Refrigerating device |
| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN104110367A (en) * | 2013-04-22 | 2014-10-22 | 合肥美的暖通设备有限公司 | Low-pressure-chamber compressor system and superheat degree control method thereof and outdoor unit |
| CN105627613A (en) * | 2016-01-04 | 2016-06-01 | 广东美的暖通设备有限公司 | Outdoor unit for air conditioner and air conditioner |
| CN106196495A (en) * | 2016-08-08 | 2016-12-07 | 珠海格力电器股份有限公司 | Control device, control method and the multi-gang air-conditioner of a kind of multi-gang air-conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106895557A (en) | 2017-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106895557B (en) | Air-conditioning system and its expansion valve control method and control device | |
| CN107576019B (en) | Air-conditioning system and its pressure ratio control method and control device | |
| CN107448376B (en) | Frequency-changeable compressor and its raising frequency control method, device and air conditioner | |
| CN105444482B (en) | Water cooled chiller and its saving-energy operation control method | |
| CN103807970B (en) | The control method of air conditioner and device | |
| CN109945564B (en) | Multi-split air conditioning system and oil return method and oil return device of compressor of multi-split air conditioning system | |
| EP3708920A1 (en) | Control method and device for air conditioning system and air conditioning system | |
| CN104006445B (en) | Multi-linkage air conditioner and control method thereof | |
| CN105509387B (en) | Air-Cooled Heat Pump Unit and electronic expansion valve opening control method therein, air-conditioning | |
| CN107036230B (en) | Air conditioner and method of controlling the same | |
| CN105783182B (en) | Air conditioner and its control method and device | |
| CN108592326A (en) | Control method, air conditioner and the computer readable storage medium of air conditioner | |
| CN107477933A (en) | Control method, system and the computer-readable recording medium of multi-connected air conditioner | |
| CN105299840B (en) | The fault detection method of multi-line system and its by-pass valve body | |
| CN112665112B (en) | Air conditioner, control method thereof and readable storage medium | |
| CN107676933A (en) | Control method, system and the computer-readable recording medium of multi-connected air conditioner | |
| CN106610091A (en) | Air-conditioner expansion valve control method and device based on superheat degree | |
| CN104481881A (en) | Air-conditioning unit compressor liquid impact determination method and system and air-conditioning unit | |
| CN107664368B (en) | Air conditioning system and control method and device of electronic expansion valve of air conditioning system | |
| CN109855251A (en) | Discharge superheat modification method, device, computer product and the air-conditioning of air-conditioning | |
| CN104613615A (en) | Air-conditioner and control method thereof | |
| CN114811868B (en) | Control method and device for electronic expansion valve and multi-split system | |
| CN108662818A (en) | The control method and device of cooling by wind wind turbine pressure ratio | |
| CN107477934A (en) | Control method, system and the computer-readable recording medium of multi-connected air conditioner | |
| CN109282433A (en) | Air conditioner and its control method and control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |