CN105864984B - Electronic expansion valve of indoor unit adjusting method and device - Google Patents
Electronic expansion valve of indoor unit adjusting method and device Download PDFInfo
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- CN105864984B CN105864984B CN201610272101.3A CN201610272101A CN105864984B CN 105864984 B CN105864984 B CN 105864984B CN 201610272101 A CN201610272101 A CN 201610272101A CN 105864984 B CN105864984 B CN 105864984B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
Abstract
The invention discloses a kind of electronic expansion valve of indoor unit adjusting method, the electronic expansion valve of indoor unit adjusting method includes the following steps：Obtain the pressure value in the first refrigerant pipe end in the indoor unit that preset pressure sensor is detected；The first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；The corresponding saturation temperature value of refrigerant is calculated according to the pressure value；Refrigerant temperature when being flowed out according to refrigerant in the saturation temperature value and indoor unit calculates the degree of superheat or degree of supercooling of indoor unit；The aperture of electronic expansion valve of indoor unit is adjusted with preset target superheat degree or target degree of supercooling according to the degree of superheat or degree of supercooling being calculated.The invention also discloses a kind of electronic expansion valve of indoor unit regulating devices.The present invention improves the precision that the degree of superheat and degree of supercooling calculate.
Description
Technical field
The present invention relates to air-conditioning technical field more particularly to electronic expansion valve of indoor unit adjusting methods and device.
Background technology
With the maturation of air-conditioning technical and the raising of customer acceptance degree, connected machine system occupies more in air-conditioning market
Carry out more vast share.As one big component part of system, indoor unit has not only acted as the effect of outlet terminal, has also taken part in stream
Amount is adjusted and the degree of superheat is adjusted, and key player is played in system stability control.
When indoor unit runs refrigeration mode, interior machine heat exchanger does evaporator use, and the electric expansion valve of indoor unit should be protected
Suitable evaporating pressure and flow are demonstrate,proved, also to ensure to export the refrigerant degree of superheat, prevent compressor from returning liquid.It is heated when indoor unit is run
When pattern, interior machine heat exchanger does condenser use, and the electric expansion valve of indoor unit, which mainly serves, adjusts flow.
The prior art generally passes through temperature sensor, pickup coil temperature, to determine that interior machine heat exchanger exports refrigerant state.
As shown in Figure 1, common temperature spot includes：Indoor environment temperature T1, indoor heat exchanger inlet temperature T2A (refrigeration), interior are changed
Temperature T2 and indoor heat exchanger outlet temperature T2B (refrigeration) in hot device pipe.When refrigeration, take degree of superheat SH=T2B-min (T2A,
T2), when SH for a certain setting value or is in a certain set interval, then it is assumed that be reasonable by the cold medium flux of indoor unit.System
When hot, coil temperature dotted state with refrigeration when on the contrary, T2B be recuperator inlet temperature, T2A is outlet temperature, and T2 is remained as
Temperature in pipe.Take degree of supercooling SC=min (T2B, T2)-T2A, when SC be a certain setting value or be in a certain set interval, then recognize
To be reasonable by the cold medium flux of indoor unit.When calculating the degree of superheat and degree of supercooling, it is all made of temperature sensor detection
Temperature value is as calculating parameter；However, since temperature sensor error is larger, carry out calculating easy formation pair using two
Weight error so that the precision that the degree of superheat and degree of supercooling calculate is poor.
Invention content
The main purpose of the present invention is to provide a kind of electronic expansion valve of indoor unit adjusting method and devices, it is intended to improve
The precision that the degree of superheat and degree of supercooling calculate.
To achieve the above object, a kind of electronic expansion valve of indoor unit adjusting method provided by the invention, it is described indoor electromechanical
Sub- expansion valve adjusting method includes the following steps：
Obtain the pressure value in the first refrigerant pipe end in the indoor unit that preset pressure sensor is detected；First refrigerant
Pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
The corresponding saturation temperature value of refrigerant is calculated according to the pressure value；
Refrigerant temperature when being flowed out according to refrigerant in the saturation temperature value and indoor unit calculates the degree of superheat of indoor unit
Or degree of supercooling；
Indoor unit is adjusted according to the degree of superheat or degree of supercooling being calculated and preset target superheat degree or target degree of supercooling
The aperture of electric expansion valve.
Preferably, the refrigerant temperature according in the saturation temperature value and indoor unit when refrigerant outflow calculates indoor
The degree of superheat or degree of supercooling of machine include：
When the air conditioner refrigerating is run, the temperature T2B of the first refrigerant pipe end is obtained, and calculates the temperature T2B
The corresponding degree of superheat of the indoor unit is obtained with the difference of the saturation temperature value；
When the air-conditioning heating is run, obtain the second refrigerant pipe end temperature T2A, and calculate the saturation temperature value with
The difference of the temperature T2A obtains the corresponding degree of supercooling of the indoor unit, when the second refrigerant pipe end is that air-conditioning heating is run
The refrigerant exit end of the indoor unit.
Preferably, the electronic expansion valve of indoor unit adjusting method further includes：
In the state that the air conditioner refrigerating is run, when the saturation temperature value is less than or equal to the first preset value and room
When the difference of interior environment temperature and the saturation temperature value is greater than or equal to the second preset value, the first preset degree of superheat is set as
The target superheat degree；When the saturation temperature value is more than first preset value or indoor environment temperature and the saturation
When the difference of temperature value is less than second preset value, the second preset degree of superheat is set as the target superheat degree；Described
The one preset degree of superheat is more than the described second preset degree of superheat.
Preferably, the electronic expansion valve of indoor unit adjusting method further includes：
In the state that the air-conditioning heating is run, when the hydrops coefficient of indoor unit is less than or equal to third preset value,
Set the first preset degree of supercooling to the target degree of supercooling；When the hydrops coefficient of indoor unit is more than third preset value, by the
Two preset degree of supercoolings are set as the target degree of supercooling；The first preset degree of supercooling is more than the described second preset degree of supercooling.
Preferably, the electronic expansion valve of indoor unit adjusting method further includes：
It calculates the saturation temperature value and the difference of the temperature T2A of indoor unit the second refrigerant pipe end obtains the first difference, and
The difference for calculating the saturation temperature value and indoor environment temperature obtains the second difference；
The ratio for calculating first difference and the second difference is worth to the hydrops coefficient.
In addition, to achieve the above object, the present invention also provides a kind of electronic expansion valve of indoor unit regulating device, the interiors
Machine electronic expansion valve adjusting device includes：
Acquisition module, for obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Value；The first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
First computing module, for calculating the corresponding saturation temperature value of refrigerant according to the pressure value；
Second computing module, based on according to the refrigerant temperature in the saturation temperature value and indoor unit when refrigerant outflow
Calculate the degree of superheat or degree of supercooling of indoor unit；
Adjustment module, for being subcooled with preset target superheat degree or target according to the degree of superheat or degree of supercooling being calculated
The aperture of degree adjustment electronic expansion valve of indoor unit.
Preferably, second computing module is specifically used for, and when the air conditioner refrigerating is run, it is cold to obtain described first
The temperature T2B of matchmaker's pipe end, and calculate the temperature T2B and the difference of the saturation temperature value and obtain the corresponding mistake of the indoor unit
Temperature；When the air-conditioning heating is run, the temperature T2A of the second refrigerant pipe end is obtained, and calculates the saturation temperature value and institute
The difference for stating temperature T2A obtains the corresponding degree of supercooling of the indoor unit, and the second refrigerant pipe end runs when institute for air-conditioning heating
State the refrigerant exit end of indoor unit.
Preferably, the electronic expansion valve of indoor unit regulating device further includes：
First setting module is used in the state that the air conditioner refrigerating is run, when the saturation temperature value is less than or waits
When the first preset value and indoor environment temperature and the difference of the saturation temperature value are greater than or equal to the second preset value, by the
The one preset degree of superheat is set as the target superheat degree；When the saturation temperature value is more than first preset value or interior
When the difference of environment temperature and the saturation temperature value is less than second preset value, the second preset degree of superheat is set as described
Target superheat degree；The first preset degree of superheat is more than the described second preset degree of superheat.
Preferably, the electronic expansion valve of indoor unit regulating device further includes：
Second setting module, in the state that the air-conditioning heating is run, be less than when the hydrops coefficient of indoor unit or
When equal to third preset value, it sets the first preset degree of supercooling to the target degree of supercooling；When the hydrops coefficient of indoor unit is more than
When third preset value, it sets the second preset degree of supercooling to the target degree of supercooling；The first preset degree of supercooling is more than described
Second preset degree of supercooling.
Preferably, the electronic expansion valve of indoor unit regulating device further includes：
Third computing module, the difference for calculating the saturation temperature value and the temperature T2A of indoor unit the second refrigerant pipe end
It is worth to the first difference, and the difference for calculating the saturation temperature value and indoor environment temperature obtains the second difference；Described in calculating
The ratio of first difference and the second difference is worth to the hydrops coefficient.
The embodiment of the present invention is by obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Force value；The corresponding saturation temperature value of refrigerant is calculated according to the pressure value；According to cold in the saturation temperature value and indoor unit
Refrigerant temperature when matchmaker is flowed out calculates the degree of superheat or degree of supercooling of indoor unit；According to the degree of superheat or degree of supercooling that are calculated with
The aperture of preset target superheat degree or target degree of supercooling adjustment electronic expansion valve of indoor unit.Due to by the way that pressure sensor is arranged
Calculation of pressure saturation temperature value is detected, the degree of superheat or degree of supercooling are calculated according to the temperature value of saturation temperature value and refrigerant exit,
It is calculated compared with the existing technology only with the value of temperature sensor detection, therefore improves the degree of superheat and degree of supercooling
The precision of calculating.
Description of the drawings
Fig. 1 is the simplified structure diagram of indoor unit in the prior art；
Fig. 2 is that indoor machine temperature sensor and pressure pass in one embodiment of electronic expansion valve of indoor unit adjusting method of the present invention
Sensor distributed architecture schematic diagram；
Fig. 3 is the structural schematic diagram of electronic expansion valve of indoor unit adjusting method first embodiment of the present invention；
Fig. 4 is the structural schematic diagram of electronic expansion valve of indoor unit adjusting method second embodiment of the present invention；
Fig. 5 is the structural schematic diagram of electronic expansion valve of indoor unit adjusting method 3rd embodiment of the present invention；
Fig. 6 is the high-level schematic functional block diagram of electronic expansion valve of indoor unit regulating device first embodiment of the present invention；
Fig. 7 is the high-level schematic functional block diagram of electronic expansion valve of indoor unit regulating device second embodiment of the present invention；
Fig. 8 is the high-level schematic functional block diagram of electronic expansion valve of indoor unit regulating device 3rd embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of electronic expansion valve of indoor unit adjusting method, with reference to Fig. 3, in one embodiment, the indoor unit
Electric expansion valve adjusting method includes：
Step S10 obtains the pressure value in the first refrigerant pipe end in the indoor unit that preset pressure sensor is detected；It is described
First refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
Electronic expansion valve of indoor unit adjusting method provided in an embodiment of the present invention is mainly used in multi-online air-conditioning system,
The multi-online air-conditioning system includes multiple indoor units, and each indoor unit includes the first refrigerant pipe end and the second refrigerant pipe end,
First refrigerant pipe end of each first indoor unit is connect by a branch pipe with same manifold.In the present embodiment, under normal circumstances,
Branch tube voltage drop from manifold disagreements to each indoor unit can be ignored, therefore pressure sensor detection can be arranged on branch pipe
Pressure value in first refrigerant pipe end (pressure sensor can be arranged on a branch pipe, and be institute by the design of pressure of detection
There is the pressure value of the first refrigerant pipe end of indoor unit, it is more accurate to obtain to be respectively provided with a pressure sensor in each branch pipe
Pressure value), pressure sensor inspection (as shown in C points in Fig. 2) can also be set on manifold survey and obtain the first of each indoor unit
Pressure value in refrigerant pipe end.
In the present embodiment, above-mentioned first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run,
The refrigerant inlet end of indoor unit when being run for air-conditioning heating.Therefore the steaming of indoor unit when above-mentioned pressure sensor both can detect refrigeration
Send out pressure, and the condensing pressure of detectable indoor machine during heating.
Step S20 calculates the corresponding saturation temperature value of refrigerant according to the pressure value；
Under different pressure values, corresponding saturation temperature is inconsistent, and there are a saturation temperature for each pressure value correspondence
Angle value can obtain corresponding saturation temperature value according to the size of pressure value by way of tabling look-up or calculating.Due to each room
First refrigerant pipe end of interior machine is interconnected by manifold, therefore the saturation temperature value of each indoor unit is consistent.
Step S30, refrigerant temperature when being flowed out according to refrigerant in the saturation temperature value and indoor unit calculate indoor unit
The degree of superheat or degree of supercooling；
In the case where obtaining saturation temperature value, the degree of superheat or the supercooling of indoor unit can be calculated according to saturation temperature value
Degree.It is understood that in refrigeration, calculating is the degree of superheat；In heating, calculating is refrigeration degree.Calculating degree of supercooling
When with the degree of superheat, it is also necessary in conjunction with the refrigerant temperature of corresponding outlet after being exchanged heat in refrigerant indoors machine.Specifically, when described
When air conditioner refrigerating is run, the temperature T2B of the first refrigerant pipe end is obtained, and calculates the temperature T2B and the saturation temperature
The difference of value obtains the corresponding degree of superheat of the indoor unit；When the air-conditioning heating is run, the second refrigerant pipe end is obtained
Temperature T2A, and calculate the saturation temperature value and the difference of the temperature T2A and obtain the corresponding degree of supercooling of the indoor unit.
Step S40, according to the degree of superheat or degree of supercooling being calculated and preset target superheat degree or target degree of supercooling tune
The aperture of whole electronic expansion valve of indoor unit.
It is common, target superheat degree and target degree of supercooling are equipped in each indoor unit, for according to the current degree of superheat and
Degree of supercooling is compared with target superheat degree and target degree of supercooling, to adjust the aperture of electronic expansion valve of indoor unit.The target mistake
Temperature and target degree of supercooling can be to be specifically worth, or a specific range is not done further limit herein.
The embodiment of the present invention is by obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Force value；The corresponding saturation temperature value of refrigerant is calculated according to the pressure value；According to cold in the saturation temperature value and indoor unit
Refrigerant temperature when matchmaker is flowed out calculates the degree of superheat or degree of supercooling of indoor unit；According to the degree of superheat or degree of supercooling that are calculated with
The aperture of preset target superheat degree or target degree of supercooling adjustment electronic expansion valve of indoor unit.Due to by the way that pressure sensor is arranged
Calculation of pressure saturation temperature value is detected, the degree of superheat or degree of supercooling are calculated according to the temperature value of saturation temperature value and refrigerant exit,
It is calculated compared with the existing technology only with the value of temperature sensor detection, therefore improves the degree of superheat and degree of supercooling
The precision of calculating.
Further, with reference to Fig. 4, it is based on electronic expansion valve of indoor unit adjusting method first embodiment of the present invention, in this hair
In bright electronic expansion valve of indoor unit adjusting method second embodiment, which includes：
Step S50 is preset in the state that the air conditioner refrigerating is run when the saturation temperature value is less than or equal to first
When value and indoor environment temperature and the difference of the saturation temperature value are greater than or equal to the second preset value, by the first preset overheat
Degree is set as the target superheat degree；When the saturation temperature value be more than first preset value or indoor environment temperature with
When the difference of the saturation temperature value is less than second preset value, the second preset degree of superheat is set as the target superheat
Degree；The first preset degree of superheat is more than the described second preset degree of superheat；
Step S10 obtains the pressure value in the first refrigerant pipe end in the indoor unit that preset pressure sensor is detected；It is described
First refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
Step S20 calculates the corresponding saturation temperature value of refrigerant according to the pressure value；
Step S30, refrigerant temperature when being flowed out according to refrigerant in the saturation temperature value and indoor unit calculate indoor unit
The degree of superheat or degree of supercooling；
Step S40, according to the degree of superheat or degree of supercooling being calculated and preset target superheat degree or target degree of supercooling tune
The aperture of whole electronic expansion valve of indoor unit.
It is understood that under normal circumstances, environment temperature is higher when refrigeration, and evaporating pressure is relatively low；Therefore in refrigeration
In the process, when the saturation temperature value is less than or equal to the first preset value and indoor environment temperature and the saturation temperature value
When difference is greater than or equal to the second preset value, a higher target superheat degree will be set.Match when indoor unit is connect with outdoor unit
When pipe is longer, loine pressure is larger, can frequently result in that saturation temperature value is higher, and heat transfer temperature difference is less than normal or the room of each indoor unit
The interior temperature difference compared with when, indoor unit is likely to occur certain bias current, in order to ensure that each indoor unit has certain exchange capability of heat, Ke Yishi
When the aperture for the electric expansion valve for increasing indoor unit；Therefore in the process of refrigeration, when the saturation temperature value is more than described the
When one preset value or indoor environment temperature and the difference of the saturation temperature value are less than second preset value, one will be arranged
A lower target superheat degree.Due to when air conditioner refrigerating is run, according to the compressor behavior of air-conditioning, to the target of setting
The degree of superheat is adjusted into Mobile state, so as to which the heat exchange efficiency of each indoor unit is effectively ensured, improves the reliability of operation of air conditioner.
Further, it is based on electronic expansion valve of indoor unit adjusting method first embodiment of the present invention with reference to Fig. 5, in the present invention
In electronic expansion valve of indoor unit adjusting method 3rd embodiment, which includes：
Step S60, in the state that the air-conditioning heating is run, when the hydrops coefficient of indoor unit is pre- less than or equal to third
If when value, it sets the first preset degree of supercooling to the target degree of supercooling；When the hydrops coefficient of indoor unit is more than third preset value
When, set the second preset degree of supercooling to the target degree of supercooling；The first preset degree of supercooling is more than the described second preset mistake
Cold degree；
Step S10 obtains the pressure value in the first refrigerant pipe end in the indoor unit that preset pressure sensor is detected；It is described
First refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
Step S20 calculates the corresponding saturation temperature value of refrigerant according to the pressure value；
Step S30, refrigerant temperature when being flowed out according to refrigerant in the saturation temperature value and indoor unit calculate indoor unit
The degree of superheat or degree of supercooling；
Step S40, according to the degree of superheat or degree of supercooling being calculated and preset target superheat degree or target degree of supercooling tune
The aperture of whole electronic expansion valve of indoor unit.
It is understood that the calculation of the hydrops coefficient of indoor unit can be configured according to actual needs,
In this embodiment, it is preferred that the saturation temperature value and the temperature T2A's of indoor unit the second refrigerant pipe end can be calculated first
Difference obtains the first difference, and the difference for calculating the saturation temperature value and indoor environment temperature obtains the second difference；Then it counts
The ratio for calculating first difference and the second difference is worth to the hydrops coefficient.Specifically, it in the present embodiment, is transported in air-conditioning heating
When row, above-mentioned hydrops coefficient is K, saturation temperature value is TC, the temperature of indoor environment temperature T1 and the second refrigerant pipe end is
T2A then has hydrops COEFFICIENT K=(TC-T2A)/(TC-T1).Meanwhile the corresponding hydrops coefficient of n-th indoor unit is K=(TC-
T2An)/(TC-T1n)；Wherein T1nIt indicates, the indoor environment temperature residing for n-th indoor unit, T2AnThe second of n-th indoor unit
The temperature of refrigerant pipe end.
It is understood that in the present embodiment, under air-conditioning heating operating status, be less than when the hydrops coefficient of indoor unit or
When equal to third preset value, then it is assumed that relatively reasonable by the cold medium flux of indoor set heat exchanger, refrigerant is gaseous state in heat exchanger
Refrigerant, interior function power are secure；One larger target degree of supercooling can be set at this time.Under air-conditioning heating operating status, when
When the hydrops coefficient of indoor unit is more than third preset value, it is believed that interior machine hydrops needs to increase electronic expansion valve opening progress drain；
At this time, it may be necessary to which a smaller target degree of supercooling is arranged.Due to when air-conditioning heating is run, according to the compressor operating shape of air-conditioning
State adjusts the target superheat degree of setting into Mobile state, so as to which the heat exchange efficiency of each indoor unit is effectively ensured, improves air-conditioning
Reliability of operation.
The present invention also provides a kind of electronic expansion valve of indoor unit regulating devices, with reference to Fig. 6, in one embodiment, the present invention
The electronic expansion valve of indoor unit regulating device of offer includes：
Acquisition module 10, for obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Value；The first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
Electronic expansion valve of indoor unit regulating device provided in an embodiment of the present invention is mainly used in multi-online air-conditioning system,
The multi-online air-conditioning system includes multiple indoor units, and each indoor unit includes the first refrigerant pipe end and the second refrigerant pipe end,
First refrigerant pipe end of each first indoor unit is connect by a branch pipe with same manifold.In the present embodiment, under normal circumstances,
Branch tube voltage drop from manifold disagreements to each indoor unit can be ignored, therefore pressure sensor detection can be arranged on branch pipe
Pressure value in first refrigerant pipe end (pressure sensor can be arranged on a branch pipe, and be institute by the design of pressure of detection
There is the pressure value of the first refrigerant pipe end of indoor unit, it is more accurate to obtain to be respectively provided with a pressure sensor in each branch pipe
Pressure value), pressure sensor detection can also be set on manifold and obtain pressure in the first refrigerant pipe end of each indoor unit
Value.
In the present embodiment, above-mentioned first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run,
The refrigerant inlet end of indoor unit when being run for air-conditioning heating.Therefore the steaming of indoor unit when above-mentioned pressure sensor both can detect refrigeration
Send out pressure, and the condensing pressure of detectable indoor machine during heating.
First computing module 20, for calculating the corresponding saturation temperature value of refrigerant according to the pressure value；
Under different pressure values, corresponding saturation temperature is inconsistent, and there are a saturation temperature for each pressure value correspondence
Angle value can obtain corresponding saturation temperature value according to the size of pressure value by way of tabling look-up or calculating.Due to each room
First refrigerant pipe end of interior machine is interconnected by manifold, therefore the saturation temperature value of each indoor unit is consistent.
Second computing module 30, refrigerant temperature when for being flowed out according to refrigerant in the saturation temperature value and indoor unit
Calculate the degree of superheat or degree of supercooling of indoor unit；
In the case where obtaining saturation temperature value, the degree of superheat or the supercooling of indoor unit can be calculated according to saturation temperature value
Degree.It is understood that in refrigeration, calculating is the degree of superheat；In heating, calculating is refrigeration degree.Calculating degree of supercooling
When with the degree of superheat, it is also necessary in conjunction with the refrigerant temperature of corresponding outlet after being exchanged heat in refrigerant indoors machine.Specifically, described
Two computing modules 30 are specifically used for, and when the air conditioner refrigerating is run, obtain the temperature T2B of the first refrigerant pipe end, and
It calculates the temperature T2B and the difference of the saturation temperature value and obtains the corresponding degree of superheat of the indoor unit；When the air-conditioning system
When heat operation, the temperature T2A of the second refrigerant pipe end is obtained, and calculates the saturation temperature value and the difference of the temperature T2A obtains
To the corresponding degree of supercooling of the indoor unit.
Adjustment module 40, for according to the degree of superheat or degree of supercooling and preset target superheat degree or target mistake being calculated
The aperture of cold degree adjustment electronic expansion valve of indoor unit.
It is common, target superheat degree and target degree of supercooling are equipped in each indoor unit, for according to the current degree of superheat and
Degree of supercooling is compared with target superheat degree and target degree of supercooling, to adjust the aperture of electronic expansion valve of indoor unit.The target mistake
Temperature and target degree of supercooling can be to be specifically worth, or a specific range is not done further limit herein.
The embodiment of the present invention is by obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Force value；The corresponding saturation temperature value of refrigerant is calculated according to the pressure value；According to cold in the saturation temperature value and indoor unit
Refrigerant temperature when matchmaker is flowed out calculates the degree of superheat or degree of supercooling of indoor unit；According to the degree of superheat or degree of supercooling that are calculated with
The aperture of preset target superheat degree or target degree of supercooling adjustment electronic expansion valve of indoor unit.Due to by the way that pressure sensor is arranged
Calculation of pressure saturation temperature value is detected, the degree of superheat or degree of supercooling are calculated according to the temperature value of saturation temperature value and refrigerant exit,
It is calculated compared with the existing technology only with the value of temperature sensor detection, therefore improves the degree of superheat and degree of supercooling
The precision of calculating.
Further, with reference to Fig. 7, it is based on electronic expansion valve of indoor unit regulating device first embodiment of the present invention, in this hair
In bright electronic expansion valve of indoor unit regulating device second embodiment, which includes：
Acquisition module 10, for obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Value；The first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
First computing module 20, for calculating the corresponding saturation temperature value of refrigerant according to the pressure value；
Second computing module 30, refrigerant temperature when for being flowed out according to refrigerant in the saturation temperature value and indoor unit
Calculate the degree of superheat or degree of supercooling of indoor unit；
Adjustment module 40, for according to the degree of superheat or degree of supercooling and preset target superheat degree or target mistake being calculated
The aperture of cold degree adjustment electronic expansion valve of indoor unit；
First setting module 50, in the state that the air conditioner refrigerating is run, be less than when the saturation temperature value or
It, will when being greater than or equal to the second preset value equal to the first preset value and indoor environment temperature and the difference of the saturation temperature value
The first preset degree of superheat is set as the target superheat degree；When the saturation temperature value is more than first preset value or room
When the difference of interior environment temperature and the saturation temperature value is less than second preset value, the second preset degree of superheat is set as institute
State target superheat degree；The first preset degree of superheat is more than the described second preset degree of superheat.
It is understood that under normal circumstances, environment temperature is higher when refrigeration, and evaporating pressure is relatively low；Therefore in refrigeration
In the process, when the saturation temperature value is less than or equal to the first preset value and indoor environment temperature and the saturation temperature value
When difference is greater than or equal to the second preset value, a higher target superheat degree will be set.Match when indoor unit is connect with outdoor unit
When pipe is longer, loine pressure is larger, can frequently result in that saturation temperature value is higher, and heat transfer temperature difference is less than normal or the room of each indoor unit
The interior temperature difference compared with when, indoor unit is likely to occur certain bias current, in order to ensure that each indoor unit has certain exchange capability of heat, Ke Yishi
When the aperture for the electric expansion valve for increasing indoor unit；Therefore in the process of refrigeration, when the saturation temperature value is more than described the
When one preset value or indoor environment temperature and the difference of the saturation temperature value are less than second preset value, one will be arranged
A lower target superheat degree.Due to when air conditioner refrigerating is run, according to the compressor behavior of air-conditioning, to the target of setting
The degree of superheat is adjusted into Mobile state, so as to which the heat exchange efficiency of each indoor unit is effectively ensured, improves the reliability of operation of air conditioner.
Further, with reference to Fig. 8, it is based on electronic expansion valve of indoor unit regulating device first embodiment of the present invention, in this hair
In bright electronic expansion valve of indoor unit regulating device 3rd embodiment, which includes：
Acquisition module 10, for obtaining the pressure in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end
Value；The first refrigerant pipe end is the refrigerant exit end of indoor unit when air conditioner refrigerating is run；
First computing module 20, for calculating the corresponding saturation temperature value of refrigerant according to the pressure value；
Second computing module 30, refrigerant temperature when for being flowed out according to refrigerant in the saturation temperature value and indoor unit
Calculate the degree of superheat or degree of supercooling of indoor unit；
Adjustment module 40, for according to the degree of superheat or degree of supercooling and preset target superheat degree or target mistake being calculated
The aperture of cold degree adjustment electronic expansion valve of indoor unit；
Second setting module 60 is used in the state that the air-conditioning heating is run, when the hydrops coefficient of indoor unit is less than
Or when equal to third preset value, set the first preset degree of supercooling to the target degree of supercooling；When the hydrops coefficient of indoor unit is big
When third preset value, it sets the second preset degree of supercooling to the target degree of supercooling；The first preset degree of supercooling is more than institute
State the second preset degree of supercooling.
It is understood that the calculation of the hydrops coefficient of indoor unit can be configured according to actual needs,
In this embodiment, it is preferred that the electronic expansion valve of indoor unit regulating device further includes third computing module, for calculating
It states saturation temperature value and the difference of the temperature T2A of indoor unit the second refrigerant pipe end obtains the first difference, and calculate the saturation temperature
Angle value and the difference of indoor environment temperature obtain the second difference；Calculate first difference and the second difference ratio be worth to it is described
Hydrops coefficient.
Specifically, in the present embodiment, when air-conditioning heating is run, above-mentioned hydrops coefficient is K, saturation temperature value is TC, room
Interior environment temperature is T1 and the temperature of the second refrigerant pipe end is T2A, then has hydrops COEFFICIENT K=(TC-T2A)/(TC-T1).Together
When, the corresponding hydrops coefficient of n-th indoor unit is K=(TC-T2An)/(TC-T1n)；Wherein T1nIt indicates, n-th indoor unit institute
The indoor environment temperature at place, T2AnThe temperature of second refrigerant pipe end of n-th indoor unit.
It is understood that in the present embodiment, under air-conditioning heating operating status, be less than when the hydrops coefficient of indoor unit or
When equal to third preset value, then it is assumed that relatively reasonable by the cold medium flux of indoor set heat exchanger, refrigerant is gaseous state in heat exchanger
Refrigerant, interior function power are secure；One larger target degree of supercooling can be set at this time.Under air-conditioning heating operating status, when
When the hydrops coefficient of indoor unit is more than third preset value, it is believed that interior machine hydrops needs to increase electronic expansion valve opening progress drain；
At this time, it may be necessary to which a smaller target degree of supercooling is arranged.Due to when air-conditioning heating is run, according to the compressor operating shape of air-conditioning
State adjusts the target superheat degree of setting into Mobile state, so as to which the heat exchange efficiency of each indoor unit is effectively ensured, improves air-conditioning
Reliability of operation.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of electronic expansion valve of indoor unit adjusting method, which is characterized in that the electronic expansion valve of indoor unit adjusting method packet
Include following steps：
Obtain the pressure value in the first refrigerant pipe end in the indoor unit that preset pressure sensor is detected；The first refrigerant pipe end
The refrigerant exit end of indoor unit when being run for air conditioner refrigerating；
The corresponding saturation temperature value of refrigerant is calculated according to the pressure value；
According in the saturation temperature value and indoor unit refrigerant flow out when refrigerant temperature calculate indoor unit the degree of superheat or
Degree of supercooling；
In the state that the air conditioner refrigerating is run, when the saturation temperature value is less than or equal to the first preset value and indoor ring
When border temperature and the difference of the saturation temperature value are greater than or equal to the second preset value, the first preset degree of superheat is set as target
The degree of superheat；When the saturation temperature value is more than first preset value or indoor environment temperature and the saturation temperature value
When difference is less than second preset value, the second preset degree of superheat is set as target superheat degree；The first preset degree of superheat
More than the described second preset degree of superheat；
In the state that the air-conditioning heating is run, when the hydrops coefficient of indoor unit is less than or equal to third preset value, by the
One preset degree of supercooling is set as target degree of supercooling；When the hydrops coefficient of indoor unit is more than third preset value, by the second preset mistake
Cold degree is set as the target degree of supercooling；The first preset degree of supercooling is more than the described second preset degree of supercooling；
Indoor unit electronics is adjusted according to the degree of superheat or degree of supercooling being calculated and preset target superheat degree or target degree of supercooling
The aperture of expansion valve.
2. electronic expansion valve of indoor unit adjusting method as described in claim 1, which is characterized in that described according to saturation temperature
Refrigerant temperature when refrigerant flows out in angle value and indoor unit calculates the degree of superheat of indoor unit or degree of supercooling includes：
When the air conditioner refrigerating is run, the temperature T2B of the first refrigerant pipe end is obtained, and calculates the temperature T2B and institute
The difference for stating saturation temperature value obtains the corresponding degree of superheat of the indoor unit；
When the air-conditioning heating is run, obtain the second refrigerant pipe end temperature T2A, and calculate the saturation temperature value with it is described
The difference of temperature T2A obtains the corresponding degree of supercooling of the indoor unit, the second refrigerant pipe end be when air-conditioning heating is run described in
The refrigerant exit end of indoor unit.
3. the electronic expansion valve of indoor unit adjusting method as described in any one of claims 1 or 2, which is characterized in that the room
Interior machine electric expansion valve adjusting method further includes：
It calculates the saturation temperature value and the difference of the temperature T2A of indoor unit the second refrigerant pipe end obtains the first difference, and calculate
The saturation temperature value and the difference of indoor environment temperature obtain the second difference；
The ratio for calculating first difference and the second difference is worth to the hydrops coefficient.
4. a kind of electronic expansion valve of indoor unit regulating device, which is characterized in that the electronic expansion valve of indoor unit regulating device packet
It includes：
Acquisition module, for obtaining the pressure value in the indoor unit that preset pressure sensor is detected in the first refrigerant pipe end；Institute
State the refrigerant exit end of indoor unit when the first refrigerant pipe end is air conditioner refrigerating operation；
First computing module, for calculating the corresponding saturation temperature value of refrigerant according to the pressure value；
Second computing module, refrigerant temperature counting chamber when for being flowed out according to refrigerant in the saturation temperature value and indoor unit
The degree of superheat or degree of supercooling of interior machine；
First setting module, in the state that the air conditioner refrigerating run, when the saturation temperature value is less than or equal to the
It is pre- by first when one preset value and indoor environment temperature and the difference of the saturation temperature value are greater than or equal to the second preset value
It sets the degree of superheat and is set as target superheat degree；When the saturation temperature value is more than first preset value or indoor environment temperature
When being less than second preset value with the difference of the saturation temperature value, the second preset degree of superheat is set as the target superheat
Degree；The first preset degree of superheat is more than the described second preset degree of superheat；
Second setting module is used in the state that the air-conditioning heating is run, when the hydrops coefficient of indoor unit is less than or equal to
When third preset value, it sets the first preset degree of supercooling to target degree of supercooling；When the hydrops coefficient of indoor unit is default more than third
When value, it sets the second preset degree of supercooling to the target degree of supercooling；It is preset that the first preset degree of supercooling is more than described second
Degree of supercooling；
Adjustment module, for according to the degree of superheat or degree of supercooling and preset target superheat degree or target degree of supercooling tune being calculated
The aperture of whole electronic expansion valve of indoor unit.
5. electronic expansion valve of indoor unit regulating device as claimed in claim 4, which is characterized in that the second computing module tool
It is used for body, when the air conditioner refrigerating is run, obtains the temperature T2B of the first refrigerant pipe end, and calculate the temperature T2B
The corresponding degree of superheat of the indoor unit is obtained with the difference of the saturation temperature value；When the air-conditioning heating is run, the is obtained
The temperature T2A of two refrigerant pipe ends, and calculate the saturation temperature value with the difference of the temperature T2A to obtain the indoor unit corresponding
Degree of supercooling, the second refrigerant pipe end is the refrigerant exit end of indoor unit when air-conditioning heating is run.
6. the electronic expansion valve of indoor unit regulating device as described in any one of claim 4 or 5, which is characterized in that the room
Interior machine electronic expansion valve adjusting device further includes：
Third computing module is obtained for calculating the saturation temperature value and the difference of the temperature T2A of indoor unit the second refrigerant pipe end
To the first difference, and the difference for calculating the saturation temperature value and indoor environment temperature obtains the second difference；Calculate described first
The ratio of difference and the second difference is worth to the hydrops coefficient.
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