CN105091440B - The control method and device of electric expansion valve - Google Patents
The control method and device of electric expansion valve Download PDFInfo
- Publication number
- CN105091440B CN105091440B CN201410213885.3A CN201410213885A CN105091440B CN 105091440 B CN105091440 B CN 105091440B CN 201410213885 A CN201410213885 A CN 201410213885A CN 105091440 B CN105091440 B CN 105091440B
- Authority
- CN
- China
- Prior art keywords
- compressor
- temperature
- expansion valve
- identified
- electric expansion
- 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
Abstract
The invention discloses a kind of control method and device of electric expansion valve, only by obtaining the aperture regulation of compressor operating frequency and delivery temperature realization to electric expansion valve, and compressor operating frequency can directly be obtained from the frequency-changing control system of compressor, therefore the temperature sensor that a sensing obtains compressor exhaust temperature is only needed to, reduce the use of temperature sensor, as long as sensing obtains the temperature sensor failsafe of compressor exhaust temperature, ensure that the normal work of electric expansion valve, improve the reliability of electronic expansion valve regulation, the cost in terms of temperature sensor is reduced simultaneously.Using the control method of electric expansion valve of the present invention or the frequency-conversion air-conditioning system of device or frequency conversion hot water pumping system etc., safer stabilization, and the cost reduction of required temperature sensor are run.
Description
Technical field
The present invention relates to frequency conversion refrigeration, heat technical field, the control method of more particularly to a kind of electric expansion valve and
Device.
Background technology
At present all using the electric expansion valve for automatically adjusting aperture in major part air conditioner coolant system, come ensure compressor and
The safety and stability of whole coolant system.
The mode that current electric expansion valve automatically adjusts aperture is：Evaporator coil temperature is got using temperature sensor
Tc, compressor return air temperature To are spent, to draw compressor return air temperature To and evaporator coil temperature Tc temperature difference SH, that is, is overheated
Spend SH=To-Tc；The degree of superheat SH drawn and setting target superheat degree Δ SH are compared again, to determine electronic expansion valve
Aperture size.Because heating mode is different from the refrigerant flow direction of refrigeration mode, when heating, condenser serves as evaporator, then mistake
Temperature SH=compressor return air temperature To- condenser coil temperature Th, thus at compressor return air pipe, it is at evaporator coil and cold
Mounting temperature sensor is required at condenser coils, i.e., at least needs 3 temperature sensors.At compressor return air pipe, evaporation
Temperature sensor at device coil pipe and at condenser coil all normal work when, electric expansion valve, which could be realized, automatically adjusts aperture
Function.
When air conditioner coolant system works, at compressor return air pipe, at evaporator coil and at condenser coil in appoint
During what temperature sensor fault at one, may result in electric expansion valve automatically adjusts aperture disabler, so that refrigerant system
System failure or unstable.
The content of the invention
The main object of the present invention improves electronic expansion valve regulation reliability and reduction air-conditioning system cost to provide one kind
Electric expansion valve control method and device.
The present invention proposes a kind of control method of electric expansion valve, comprises the following steps：
S10, periodically obtains compressor current running frequency and delivery temperature；
S20, according to the mapping relations between default compressor operating frequency and standard deliveries temperature range, it is determined that with pressure
The corresponding standard deliveries temperature range of the current running frequency of contracting machine；
S30, when the current delivery temperature of compressor is not in identified standard deliveries temperature range, by default mould
Formula adjusts the aperture of electric expansion valve.
Preferably, the step S30 includes：
When the current delivery temperature of compressor is less than the lower limit of identified standard deliveries temperature range, by the electricity
The aperture of sub- expansion valve turns down a preset value.
Preferably, the step S30 includes：
When the current delivery temperature of compressor is more than the higher limit of identified standard deliveries temperature range, by the electricity
The aperture of sub- expansion valve opens a big preset value.
Preferably, the step S30 includes：
When the current delivery temperature of compressor is less than the lower limit of identified standard deliveries temperature range, according to compression
Default mapping relations between machine running frequency and C.T, it is determined that comparison temperature corresponding with the running frequency that compressor is current
Degree, and obtain the temperature difference between current delivery temperature and identified C.T；The C.T is between being determined
Standard deliveries temperature range in；
According to default mapping relations between temperature difference and aperture regulation value, it is determined that corresponding with identified temperature difference open
Spend regulated value；
The aperture of the electric expansion valve is turned down into identified aperture regulation value.
Preferably, the step S30 includes：
When the current delivery temperature of compressor is more than the higher limit of identified standard deliveries temperature range, according to compression
Default mapping relations between machine running frequency and C.T, it is determined that comparison temperature corresponding with the running frequency that compressor is current
Degree, and obtain the temperature difference between current delivery temperature and identified C.T；The C.T is between being determined
Standard deliveries temperature range in；
According to default mapping relations between temperature difference and aperture regulation value, it is determined that corresponding with identified temperature difference open
Spend regulated value；
The aperture of the electric expansion valve is opened into big identified aperture regulation value.
A kind of control device of electric expansion valve of the present invention, including：
Acquisition module, the running frequency and delivery temperature current for periodically obtaining compressor；
Determining module, for being closed according to the mapping between default compressor operating frequency and standard deliveries temperature range
System, it is determined that standard deliveries temperature range corresponding with the running frequency that compressor is current；
Adjustment module, for when the current delivery temperature of compressor is not in identified standard deliveries temperature range, pressing
The aperture of default mode tuning electric expansion valve.
Preferably, the adjustment module is used to be less than identified standard deliveries temperature in the current delivery temperature of compressor
During the lower limit of scope, the aperture of the electric expansion valve is turned down into a preset value.
Preferably, the adjustment module is used to be more than identified standard deliveries temperature in the current delivery temperature of compressor
During the higher limit of scope, the aperture of the electric expansion valve is opened into a big preset value.
Preferably, the adjustment module includes：
First acquisition unit, for being less than identified standard deliveries temperature range in the current delivery temperature of compressor
During lower limit, according to default mapping relations between compressor operating frequency and C.T, it is determined that the fortune with compressor currently
The corresponding C.T of line frequency, and obtain the temperature difference between current delivery temperature and identified C.T；It is described
C.T is in identified standard deliveries temperature range；
Second acquisition unit, for according to default mapping relations between temperature difference and aperture regulation value, it is determined that with really
The corresponding aperture regulation value of fixed temperature difference；
First adjustment unit, for the aperture of the electric expansion valve to be turned down into identified aperture regulation value.
Preferably, the adjustment module includes：
3rd acquiring unit, for being less than identified standard deliveries temperature range in the current delivery temperature of compressor
During lower limit, according to default mapping relations between compressor operating frequency and C.T, it is determined that the fortune with compressor currently
The corresponding C.T of line frequency, and obtain the temperature difference between current delivery temperature and identified C.T；It is described
C.T is in identified standard deliveries temperature range；
4th acquiring unit, for according to default mapping relations between temperature difference and aperture regulation value, it is determined that with really
The corresponding aperture regulation value of fixed temperature difference；
Second adjustment unit, for the aperture of the electric expansion valve to be turned down into identified aperture regulation value.
The control method and device of electric expansion valve of the present invention, it is only real by obtaining compressor operating frequency and delivery temperature
Now to the aperture regulation of electric expansion valve, and compressor operating frequency can directly be obtained from the frequency-changing control system of compressor,
Therefore the temperature sensor that a sensing obtains compressor exhaust temperature is only needed to, the use of temperature sensor is reduced, as long as
Sensing obtains the temperature sensor failsafe of compressor exhaust temperature, so that it may ensure the normal work of electric expansion valve, improves
The reliability of electronic expansion valve regulation, while the cost in terms of reducing temperature sensor.Use electric expansion valve of the present invention
Control method or device frequency-conversion air-conditioning system or frequency conversion hot water pumping system etc., run safer stabilization, and required temperature
The cost reduction of sensor.
Brief description of the drawings
Fig. 1 is the flow chart of the control method preferred embodiment of electric expansion valve of the present invention；
Fig. 2 is the flow chart of step S30 3rd embodiments in Fig. 1 of the present invention；
Fig. 3 is the flow chart of step S30 fourth embodiments in Fig. 1 of the present invention；
Fig. 4 is the schematic diagram of the control device preferred embodiment of electric expansion valve of the present invention；
Fig. 5 is the schematic diagram of adjustment module 3rd embodiment in Fig. 4 of the present invention；
Fig. 6 is the schematic diagram of adjustment module 3rd embodiment in Fig. 4 of the present invention；
Refrigerant when Fig. 7 is air-conditioning system refrigeration flows to schematic diagram；
Fig. 8 is that refrigerant when air-conditioning system is heated flows to schematic diagram.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
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.
As shown in Figure 1 to Figure 3, Fig. 1 is the flow chart of the control method preferred embodiment of electric expansion valve of the present invention, Fig. 2
It is the flow chart of step S30 3rd embodiments in Fig. 1 of the present invention, Fig. 3 is the stream of step S30 fourth embodiments in Fig. 1 of the present invention
Cheng Tu；Refrigerant when Fig. 7 is air-conditioning system refrigeration flows to schematic diagram, and Fig. 8 is that refrigerant when air-conditioning system is heated flows to schematic diagram.
Reference picture 1, the control method for the electric expansion valve that the embodiment is mentioned, including：
Step S10, periodically obtains compressor current running frequency and delivery temperature；
Compressor operating frequency is directly obtained from the frequency-changing control system of compressor, and the delivery temperature of compressor passes through in pressure
The temperature sensor detection set at contracting machine blast pipe is obtained.The length in cycle, can be according to practical adjustments need to be set in advance
Ask and modify.For example, the cycle is 60 seconds, then the current operation frequency and delivery temperature of first compression machine were obtained every 60 seconds.
Step S20, according to the mapping relations between default compressor operating frequency and standard deliveries temperature range, it is determined that
Standard deliveries temperature range corresponding with the running frequency that compressor is current；
The mapping relations of compressor operating frequency and standard deliveries temperature range are pre-set, standard deliveries temperature model
Enclose the preferably temperature range that can be drawn by test data.When air-conditioning system is refrigeration mode, standard deliveries temperature range is
Standard deliveries temperature range during refrigeration mode, when air-conditioning system is heating mode, standard deliveries temperature range is heating mode
When standard deliveries temperature range.
Step S30, when the current delivery temperature of compressor is not in identified standard deliveries temperature range, by default
Mode tuning electric expansion valve aperture.
Illustrate as an example herein, for example, between compressor operating frequency Fx and standard deliveries temperature range (T1≤T≤T2)
Mapping relations can be：One standard deliveries temperature range of each running frequency section (F1≤Fx≤F2) correspondence (T1≤T≤
T2).When the current delivery temperature Tp of compressor is not interior in identified standard deliveries temperature range (T1≤T≤T2), i.e. Tp
During ＜ T1 or Tp ＞ T2, by the aperture of default mode tuning electric expansion valve, make the delivery temperature Tp of compressor between really
In fixed standard deliveries temperature range (T1≤T≤T2), or closer identified standard deliveries temperature range (T1≤T≤
T2).Default pattern is the mode for presetting regulation electronic expansion valve opening.
Can be a variety of feelings when the current delivery temperature of compressor is in identified standard deliveries temperature range
Condition, for example, the 1, aperture of holding electric expansion valve is constant；2nd, by the current delivery temperature of compressor and identified standard deliveries
The first temperature range in temperature range is compared, and in the current delivery temperature of compressor not in first temperature range
When, by the aperture of another default mode tuning electric expansion valve, in the current delivery temperature of compressor between first temperature
In the range of when, keep electric expansion valve aperture it is constant；Can also be to arrange compressor current exhaust gas temperature and identified standard
Situations such as median or higher limit or lower limit of gas temperature range are compared etc..
In the present embodiment, after aperture regulation is performed every time, air-conditioning system is needed after refrigerant circulation at least one times, air-conditioning system
System can be only achieved the new steady s tate after electronic expansion valve regulation, and now the delivery temperature of compressor is just adjusted for electric expansion valve
The delivery temperature of stabilization after section, therefore, periodically obtains the current running frequency and delivery temperature of compressor, is to hold
After row aperture regulation, air-conditioning system reaches new steady s tate in the period distances, then goes the compressor air-discharging temperature that gets
Degree, so as to get more accurately delivery temperature.
The control method of the electric expansion valve of the present embodiment, is only realized by obtaining compressor operating frequency and delivery temperature
To the aperture regulation of electric expansion valve, and compressor operating frequency can be by directly from compressor acquisition, therefore only need to one
Individual sensing obtains the temperature sensor of compressor exhaust temperature, reduces the use of temperature sensor, as long as sensing obtains compression
The temperature sensor failsafe of machine delivery temperature, so that it may ensure the normal work of electric expansion valve, improve electric expansion valve
The reliability of regulation, while the cost in terms of reducing temperature sensor.Use the controlling party of the electric expansion valve of the present embodiment
Frequency-conversion air-conditioning system or frequency conversion hot water pumping system of method etc., run safer stabilization, and the cost drop of required temperature sensor
It is low.
Specifically, the present embodiment is based on first embodiment, the step S30 of the present embodiment includes：As the row of compressor currently
When temperature degree is less than the lower limit of identified standard deliveries temperature range, the aperture of electric expansion valve is turned down into a preset value.
The mode of regulation aperture is to turn down a preset value herein.Reference picture 7 and Fig. 8 understood, the arrow in Fig. 7 and Fig. 8
Head direction is the flow direction of refrigerant, is less than in the current delivery temperature of compressor under identified standard deliveries temperature range
During limit value, illustrate the return-air supercooling (temperature is too low) of compressor, cause the delivery temperature of compressor low.Therefore, by turning down electricity
Sub- expansion valve is throttled so that the suction temperature of compressor is raised, so that the delivery temperature of compressor is lifted, so that compressor
Delivery temperature in identified standard deliveries temperature range, or make the temperature value of compressor closer to identified mark
The lower limit of quasi- exhaust temperature ranges (i.e. closer to identified standard deliveries temperature range).Preset value is opened to preset one
Spend regulated value, such as 10P (herein P be aperture unit).
Specifically, the present embodiment is based on first embodiment, the step S30 of the present embodiment includes：As the row of compressor currently
When temperature degree is more than the higher limit of identified standard deliveries temperature range, the aperture of electric expansion valve is opened into a big preset value.
The mode of regulation aperture is to open a big preset value herein.Reference picture 7 and Fig. 8 understood, the arrow in Fig. 7 and Fig. 8
Head direction is the flow direction of refrigerant, is more than the upper of identified standard deliveries temperature range in the current delivery temperature of compressor
During limit value, illustrate the return-air overheat (temperature is too high) of compressor, cause the delivery temperature of compressor high.Therefore, by opening big electricity
Sub- expansion valve carries out increasing refrigerant stream the suction temperature reduction so that compressor, so that the delivery temperature of compressor is reduced, so that
The delivery temperature of compressor is in identified standard deliveries temperature range, or makes the delivery temperature of compressor closer to institute
The higher limit of the standard deliveries temperature range of determination (i.e. closer to identified standard deliveries temperature range).Preset value herein
Also to preset aperture regulation value, such as 10P (herein P be aperture unit).
Specifically, reference picture 2, the present embodiment is based on first embodiment, the step S30 of the present embodiment includes：
Step S31, when the current delivery temperature of compressor is less than the lower limit of identified standard deliveries temperature range,
According to default mapping relations between compressor operating frequency and C.T, it is determined that corresponding with the running frequency that compressor is current
C.T, and obtain the temperature difference between current delivery temperature and identified C.T；C.T is between institute
In the standard deliveries temperature range of determination；
Mapping relations between compressor operating frequency Fx and C.T Tx can be：Each compressor operating frequency Fx
Or each compressor operating frequency scope (F3 ＜ Fx ＜ F4) correspondence one C.T Tx, C.T Tx be between it is true
Temperature in fixed standard deliveries temperature range (T1≤T≤T2).Obtain current delivery temperature Tp and the C.T determined
Temperature difference between Tx, i.e., make the difference to obtain temperature difference Δ T=Tp-Tx by delivery temperature Tp and C.T Tx.
Step S32, according to default mapping relations between temperature difference and aperture regulation value, it is determined that with identified temperature difference
Corresponding aperture regulation value；
Mapping relations between temperature difference Δ T and aperture regulation value can be：Each temperature difference Δ T or each temperature difference models
Enclose section (Δ T1 ＜ Δ T ＜ Δ T2) one aperture regulation value of correspondence.
The aperture of electric expansion valve is turned down identified aperture regulation value by step, S33.
For example, by the aperture of electric expansion valve turn down 30P (herein P be aperture unit).
The mode of regulation aperture herein is：According to by the current delivery temperature of compressor and compressor current operation frequency
Aperture regulation value determined by temperature difference between corresponding C.T, the aperture to electric expansion valve is turned down.
Specifically, reference picture 3, the present embodiment is based on first embodiment, the step S30 of the present embodiment includes：
Step S34, when the current delivery temperature of compressor is more than the higher limit of identified standard deliveries temperature range,
According to default mapping relations between compressor operating frequency and C.T, it is determined that corresponding with the running frequency that compressor is current
C.T, and obtain the temperature difference between current delivery temperature and identified C.T；C.T is between institute
In the standard deliveries temperature range of determination；
Mapping relations between compressor operating frequency Fx and C.T Tx can be：Each compressor operating frequency Fx
Or each compressor operating frequency scope (F3 ＜ Fx ＜ F4) correspondence one C.T Tx, C.T Tx be between it is true
Temperature in fixed standard deliveries temperature range (T1≤T≤T2).Obtain current delivery temperature Tp and the C.T determined
Temperature difference between Tx, i.e., make the difference to obtain temperature difference Δ T=Tp-Tx by delivery temperature Tp and C.T Tx.
Step S35, according to default mapping relations between temperature difference and aperture regulation value, it is determined that with identified temperature difference
Corresponding aperture regulation value；
Mapping relations between temperature difference Δ T and aperture regulation value can be：Each temperature difference Δ T or each temperature difference models
Enclose section (Δ T1 ＜ Δ T ＜ Δ T2) one aperture regulation value of correspondence.
Step S36, big identified aperture regulation value is opened by the aperture of electric expansion valve.
For example, by the aperture of electric expansion valve open big 40P (herein P be aperture unit).
The mode of regulation aperture herein is：According to by the current delivery temperature of compressor and compressor current operation frequency
Aperture regulation value determined by temperature difference between corresponding C.T, the aperture to electric expansion valve carries out opening big.
Default pattern in the step S30 of the present invention, can be any combination of the modes of above-mentioned various regulation apertures.
As shown in Figures 4 to 6, Fig. 4 is the schematic diagram for the control device preferred embodiment for being electric expansion valve of the present invention, figure
5 be the schematic diagram of adjustment module 3rd embodiment in Fig. 4 of the present invention, and Fig. 6 is adjustment module 3rd embodiment in Fig. 4 of the present invention
Schematic diagram.
Reference picture 4, present invention further propose that a kind of control device of electric expansion valve, including：
Acquisition module 10, the running frequency and delivery temperature current for periodically obtaining compressor；
Acquisition module 10 directly obtains compressor operating frequency from the frequency-changing control system of compressor, and acquisition module 10 passes through
The temperature sensor detection set at compressor exhaust pipe obtains the delivery temperature of compressor.
Determining module 20, for being closed according to the mapping between default compressor operating frequency and standard deliveries temperature range
System, it is determined that standard deliveries temperature range corresponding with the running frequency that compressor is current；
The mapping relations of compressor operating frequency and standard deliveries temperature range are pre-set, standard deliveries temperature model
Enclose the preferably temperature range that can be drawn by test data.When air-conditioning system is refrigeration mode, standard deliveries temperature range is
Standard deliveries temperature range during refrigeration mode, when air-conditioning system is heating mode, standard deliveries temperature range is heating mode
When standard deliveries temperature range.
Adjustment module 30, for when the current delivery temperature of compressor is not in identified standard deliveries temperature range,
By the aperture of default mode tuning electric expansion valve.
Illustrate as an example herein, for example, between compressor operating frequency Fx and standard deliveries temperature range (T1≤T≤T2)
Mapping relations can be：One standard deliveries temperature range of each running frequency section (F1≤Fx≤F2) correspondence (T1≤T≤
T2).When the current delivery temperature Tp of compressor is not interior in identified standard deliveries temperature range (T1≤T≤T2), i.e. Tp
During ＜ T1 or Tp ＞ T2, by the aperture of default mode tuning electric expansion valve, make the delivery temperature Tp of compressor between really
In fixed standard deliveries temperature range (T1≤T≤T2), or closer identified standard deliveries temperature range (T1≤T≤
T2).Default pattern is the mode for presetting regulation electronic expansion valve opening.
Can be a variety of feelings when the current delivery temperature of compressor is in identified standard deliveries temperature range
Condition, for example, the aperture of the uncomfortable section electric expansion valve of 1, adjustment module 30, keeps the aperture of electric expansion valve constant；2nd, will compression
The current delivery temperature of machine is compared with the first temperature range in identified standard deliveries temperature range, and in compressor
When current delivery temperature is not in first temperature range, adjustment module 30 presses another default mode tuning electric expansion valve
Aperture, when the current delivery temperature of compressor is in first temperature range, the uncomfortable section electronic expansion of adjustment module 30
The aperture of valve, keeps the aperture of electric expansion valve constant.Can also be to arrange compressor current exhaust gas temperature and identified standard
Situations such as median or higher limit or lower limit of gas temperature range are compared etc..
In the present embodiment, after adjustment module 30 performs aperture regulation every time, refrigerant is followed air-conditioning system needs at least one times
After ring, air-conditioning system can be only achieved the new steady s tate after electronic expansion valve regulation, and now the delivery temperature of compressor is
The delivery temperature of stabilization after electronic expansion valve regulation, therefore, acquisition module 10 periodically obtain the operation frequency of compressor currently
Rate and delivery temperature, are in order to which after adjustment module 30 performs aperture regulation, air-conditioning system reaches new in the period distances
Stable state, acquisition module 10 removes the compressor exhaust temperature got again, so as to get more accurately delivery temperature.
The control device of the electric expansion valve of the present embodiment, is only realized by obtaining compressor operating frequency and delivery temperature
To the aperture regulation of electric expansion valve, and compressor operating frequency can be by directly from compressor acquisition, therefore only need to one
Individual sensing obtains the temperature sensor of compressor exhaust temperature, reduces the use of temperature sensor, as long as sensing obtains compression
The temperature sensor failsafe of machine delivery temperature, so that it may ensure the normal work of electric expansion valve, improve electric expansion valve
The reliability of regulation, while the cost in terms of reducing temperature sensor.Filled using the control of the electric expansion valve of the present embodiment
Frequency-conversion air-conditioning system or frequency conversion hot water pumping system for putting etc., run safer stabilization, and the cost drop of required temperature sensor
It is low.
Specifically, the present embodiment is based on first embodiment, the adjustment module 30 of the present embodiment is used for current in compressor
When delivery temperature is less than the lower limit of identified standard deliveries temperature range, the aperture of electric expansion valve is turned down one and preset
Value.
The mode of regulation aperture is to turn down a preset value herein.Reference picture 7 and Fig. 8 understood, the arrow in Fig. 7 and Fig. 8
Head direction is the flow direction of refrigerant, is less than the lower limit of the standard deliveries temperature range determined in the current delivery temperature of compressor
During value, illustrate the return-air supercooling (temperature is too low) of compressor, cause the delivery temperature of compressor low.Therefore, adjustment module 30 is led to
Cross control turn down electric expansion valve throttled so that compressor suction temperature raise, so as to lift the exhaust temperature of compressor
Degree, so that the delivery temperature of compressor is in the standard deliveries temperature range that the current running frequency of compressor is determined, or
Make the temperature value of compressor closer to lower limit (the i.e. closer identified standard deliveries of the standard deliveries temperature range determined
Temperature range).Preset value to preset an aperture regulation value, such as 10P (herein P be aperture unit).
Specifically, the present embodiment is based on first embodiment, the adjustment module of the present embodiment is used for the row in compressor currently
When temperature degree is more than the higher limit of identified standard deliveries temperature range, the aperture of electric expansion valve is opened into a big preset value.
The mode of regulation aperture is to open a big preset value herein.Reference picture 7 and Fig. 8 understood, the arrow in Fig. 7 and Fig. 8
Head direction is the flow direction of refrigerant, is more than the upper of identified standard deliveries temperature range in the current delivery temperature of compressor
During limit value, illustrate the return-air overheat (temperature is too high) of compressor, cause the delivery temperature of compressor high.Therefore, adjustment module 30
Big electric expansion valve is opened by control and carries out increase refrigerant stream so that the suction temperature of compressor is reduced, so as to reduce compressor
Delivery temperature, so that the delivery temperature of compressor is in identified standard deliveries temperature range, or makes the row of compressor
Higher limit (i.e. closer identified standard deliveries temperature model of the temperature degree closer to identified standard deliveries temperature range
Enclose).Preset value to preset an aperture regulation value, such as 10P (herein P be aperture unit).
Specifically, reference picture 5, the present embodiment is based on first embodiment, the adjustment module 30 of the present embodiment includes：
First acquisition unit 31, for being less than identified standard deliveries temperature range in the current delivery temperature of compressor
Lower limit when, according to default mapping relations between compressor operating frequency and C.T, it is determined that current with compressor
The corresponding C.T of running frequency, and obtain the temperature difference between current delivery temperature and identified C.T；Than
Compared with temperature in identified standard deliveries temperature range；
Mapping relations between compressor operating frequency Fx and C.T Tx can be：Each compressor operating frequency Fx
Or one C.T Tx of each compressor operating frequency scope (F3 ＜ Fx ＜ F4) correspondence.For example, compressor operating frequency is
During 30~40HZ, corresponding C.T is 65 DEG C；When compressor is 40~50HZ, corresponding C.T is 70 DEG C.Obtain
Temperature difference between current delivery temperature Tp and the C.T Tx of determination, i.e., make the difference delivery temperature Tp with C.T Tx
Obtain temperature difference Δ T=Tp-Tx.
Second acquisition unit 32, for according to default mapping relations between temperature difference and aperture regulation value, it is determined that and institute
The corresponding aperture regulation value of temperature difference of determination；
Mapping relations between temperature difference Δ T and aperture regulation value can be：Each temperature difference Δ T or each temperature difference models
Enclose section (Δ T1 ＜ Δ T ＜ Δ T2) one aperture regulation value of correspondence.
First adjustment unit 33, for the aperture of electric expansion valve to be turned down into identified aperture regulation value.
For example, by the aperture of electric expansion valve turn down 30P (herein P be aperture unit).
The mode of regulation aperture herein is：According to by the current delivery temperature of compressor and compressor current operation frequency
Aperture regulation value determined by temperature difference between corresponding C.T, the aperture to electric expansion valve is turned down.
Specifically, reference picture 6, the present embodiment is based on first embodiment, the adjustment module 30 of the present embodiment includes：
3rd acquiring unit 34, for being less than identified standard deliveries temperature range in the current delivery temperature of compressor
Lower limit when, according to default mapping relations between compressor operating frequency and C.T, it is determined that current with compressor
The corresponding C.T of running frequency, and obtain the temperature difference between current delivery temperature and identified C.T；Than
Compared with temperature in identified standard deliveries temperature range；
Mapping relations between compressor operating frequency Fx and C.T Tx can be：Each compressor operating frequency Fx
Or one C.T Tx of each compressor operating frequency scope (F3 ＜ Fx ＜ F4) correspondence.For example, compressor operating frequency is
During 30~40HZ, corresponding C.T is 65 DEG C；When compressor is 40~50HZ, corresponding C.T is 70 DEG C.Obtain
Temperature difference between current delivery temperature Tp and the C.T Tx of determination, i.e., make the difference delivery temperature Tp with C.T Tx
Obtain temperature difference Δ T=Tp-Tx.
4th acquiring unit 35, for according to default mapping relations between temperature difference and aperture regulation value, it is determined that and institute
The corresponding aperture regulation value of temperature difference of determination；
Mapping relations between temperature difference Δ T and aperture regulation value can be：Each temperature difference Δ T or each temperature difference models
Enclose section (Δ T1 ＜ Δ T ＜ Δ T2) one aperture regulation value of correspondence.
Second adjustment unit 36, for the aperture of electric expansion valve to be turned down into identified aperture regulation value.
For example, by the aperture of electric expansion valve turn down 40P (herein P be aperture unit).
The mode of regulation aperture herein is：According to by the current delivery temperature of compressor and compressor current operation frequency
Aperture regulation value determined by temperature difference between corresponding C.T, the aperture to electric expansion valve carries out opening big.
The default pattern of the adjustment module 30 of the present invention, can be any group of the modes of above-mentioned various regulation apertures
Close.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of control method of electric expansion valve, it is characterised in that comprise the following steps：
S10, periodically obtains compressor current running frequency and delivery temperature；
S20, according to the mapping relations between default compressor operating frequency and standard deliveries temperature range, it is determined that and compressor
The corresponding standard deliveries temperature range of current running frequency, wherein, compressor operating frequency and standard deliveries temperature range
Mapping relations are pre-set, to directly obtain standard deliveries temperature range by compressor operating frequency；
S30, when the current delivery temperature of compressor is not in identified standard deliveries temperature range, is adjusted by default pattern
Save the aperture of electric expansion valve.
2. the control method of electric expansion valve according to claim 1, it is characterised in that the step S30 includes：
It is when the current delivery temperature of compressor is less than the lower limit of identified standard deliveries temperature range, the electronics is swollen
The aperture of swollen valve turns down a preset value.
3. the control method of electric expansion valve according to claim 1, it is characterised in that the step S30 includes：
It is when the current delivery temperature of compressor is more than the higher limit of identified standard deliveries temperature range, the electronics is swollen
The aperture of swollen valve opens a big preset value.
4. the control method of electric expansion valve according to claim 1, it is characterised in that the step S30 includes：
When the current delivery temperature of compressor is less than the lower limit of identified standard deliveries temperature range, transported according to compressor
Default mapping relations between line frequency and C.T, it is determined that C.T corresponding with the running frequency that compressor is current,
And obtain the temperature difference between current delivery temperature and identified C.T；The C.T is between identified mark
In quasi- exhaust temperature ranges；
According to default mapping relations between temperature difference and aperture regulation value, it is determined that aperture corresponding with identified temperature difference is adjusted
Section value；
The aperture of the electric expansion valve is turned down into identified aperture regulation value.
5. the control method of electric expansion valve according to claim 1, it is characterised in that the step S30 includes：
When the current delivery temperature of compressor is more than the higher limit of identified standard deliveries temperature range, transported according to compressor
Default mapping relations between line frequency and C.T, it is determined that C.T corresponding with the running frequency that compressor is current,
And obtain the temperature difference between current delivery temperature and identified C.T；The C.T is between identified mark
In quasi- exhaust temperature ranges；
According to default mapping relations between temperature difference and aperture regulation value, it is determined that aperture corresponding with identified temperature difference is adjusted
Section value；
The aperture of the electric expansion valve is opened into big identified aperture regulation value.
6. a kind of control device of electric expansion valve, it is characterised in that including：
Acquisition module, the running frequency and delivery temperature current for periodically obtaining compressor；
Determining module, for according to the mapping relations between default compressor operating frequency and standard deliveries temperature range, really
Fixed standard deliveries temperature range corresponding with the running frequency that compressor is current, wherein, compressor operating frequency and standard deliveries
The mapping relations of temperature range are pre-set, to directly obtain standard deliveries temperature range by compressor operating frequency；
Adjustment module, for when the current delivery temperature of compressor is not in identified standard deliveries temperature range, by default
Mode tuning electric expansion valve aperture.
7. the control device of electric expansion valve according to claim 6, it is characterised in that the adjustment module is used in pressure
When the current delivery temperature of contracting machine is less than the lower limit of identified standard deliveries temperature range, by opening for the electric expansion valve
Degree turns down a preset value.
8. the control device of electric expansion valve according to claim 6, it is characterised in that the adjustment module is used in pressure
When the current delivery temperature of contracting machine is more than the higher limit of identified standard deliveries temperature range, by opening for the electric expansion valve
Degree opens a big preset value.
9. the control device of electric expansion valve according to claim 6, it is characterised in that the adjustment module includes：
First acquisition unit, the lower limit for being less than identified standard deliveries temperature range in the current delivery temperature of compressor
During value, according to default mapping relations between compressor operating frequency and C.T, it is determined that the operation frequency with compressor currently
The corresponding C.T of rate, and obtain the temperature difference between current delivery temperature and identified C.T；The comparison
Temperature is in identified standard deliveries temperature range；
Second acquisition unit, for according to default mapping relations between temperature difference and aperture regulation value, it is determined that with it is identified
The corresponding aperture regulation value of temperature difference；
First adjustment unit, for the aperture of the electric expansion valve to be turned down into identified aperture regulation value.
10. the control device of electric expansion valve according to claim 6, it is characterised in that the adjustment module includes：
3rd acquiring unit, the upper limit for being more than identified standard deliveries temperature range in the current delivery temperature of compressor
During value, according to default mapping relations between compressor operating frequency and C.T, it is determined that the operation frequency with compressor currently
The corresponding C.T of rate, and obtain the temperature difference between current delivery temperature and identified C.T；The comparison
Temperature is in identified standard deliveries temperature range；
4th acquiring unit, for according to default mapping relations between temperature difference and aperture regulation value, it is determined that with it is identified
The corresponding aperture regulation value of temperature difference；
Second adjustment unit, for the aperture of the electric expansion valve to be opened into big identified aperture regulation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213885.3A CN105091440B (en) | 2014-05-20 | 2014-05-20 | The control method and device of electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213885.3A CN105091440B (en) | 2014-05-20 | 2014-05-20 | The control method and device of electric expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105091440A CN105091440A (en) | 2015-11-25 |
| CN105091440B true CN105091440B (en) | 2017-11-03 |
Family
ID=54572415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410213885.3A Active CN105091440B (en) | 2014-05-20 | 2014-05-20 | The control method and device of electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105091440B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106813322B (en) * | 2015-11-30 | 2019-08-20 | 青岛海尔空调电子有限公司 | A kind of air conditioning pressure protection system and air conditioner refrigerating, heating pressure protection method |
| CN105299940B (en) * | 2015-12-07 | 2017-11-10 | 集美大学 | A kind of control method of frozen products insulated container frequency-changing cyclone compressor refrigeration system |
| CN105953357B (en) * | 2016-04-28 | 2018-11-13 | 奥克斯空调股份有限公司 | The control method of convertible frequency air-conditioner |
| CN106152399B (en) * | 2016-07-04 | 2019-05-31 | 青岛海尔空调器有限总公司 | The method for controlling air conditioner electric expansion valve |
| CN106403427B (en) * | 2016-08-31 | 2019-04-02 | 烟台欧森纳地源空调股份有限公司 | A kind of control method of refrigeration system startup stage electric expansion valve |
| CN106766376B (en) * | 2016-12-30 | 2019-11-01 | 珠海格力电器股份有限公司 | A kind of heat pump unit adjusting method, device and air-conditioning |
| CN107894121A (en) * | 2017-10-27 | 2018-04-10 | 广东美的暖通设备有限公司 | Detection method, compressor and the electric equipment of compressor temperature sensor |
| CN109028485A (en) * | 2018-06-12 | 2018-12-18 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of air-conditioning system |
| CN108954652B (en) * | 2018-06-21 | 2021-08-10 | 青岛海尔空调电子有限公司 | Electronic expansion valve control method and control device, air conditioner and computer readable storage medium |
| CN110966713B (en) * | 2018-09-29 | 2021-04-20 | 青岛海尔空调器有限总公司 | Method and device for determining target exhaust temperature of electronic expansion valve |
| CN110966712B (en) * | 2018-09-29 | 2021-04-20 | 青岛海尔空调器有限总公司 | Method and device for determining target exhaust temperature of electronic expansion valve of air conditioner |
| CN109798626A (en) * | 2019-01-07 | 2019-05-24 | 广东美的暖通设备有限公司 | The control method and device of the electric expansion valve of outer machine heat exchanger |
| CN111099525A (en) * | 2019-12-25 | 2020-05-05 | 苏州罗伯特木牛流马物流技术有限公司 | Double portal AGV |
| CN111928454A (en) * | 2020-07-31 | 2020-11-13 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| CN112781266A (en) * | 2020-12-04 | 2021-05-11 | 广东积微科技有限公司 | Enhanced vapor injection heat pump system and control method of electronic expansion valve thereof |
| CN113639404A (en) * | 2021-08-20 | 2021-11-12 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| CN115507572B (en) * | 2022-10-31 | 2023-07-04 | 宁波奥克斯电气股份有限公司 | Error detection method and device for electronic expansion valve, air conditioner and storage medium |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1287298B1 (en) * | 2000-06-07 | 2006-11-15 | Samsung Electronics Co., Ltd. | Control system of degree of superheat of air conditioner and control method thereof |
| KR100468917B1 (en) * | 2002-04-29 | 2005-02-02 | 삼성전자주식회사 | Multi-type air conditioner |
| JP2007212078A (en) * | 2006-02-10 | 2007-08-23 | Fujitsu General Ltd | Air-conditioner control device |
| CN101038097B (en) * | 2006-03-15 | 2011-02-02 | 海尔集团公司 | Refrigerating system of air-conditioning and method for controlling flow of refrigerant |
| JP5430602B2 (en) * | 2011-04-04 | 2014-03-05 | 三菱電機株式会社 | Air conditioner |
| CN103512145B (en) * | 2012-06-19 | 2016-08-31 | 珠海格力电器股份有限公司 | The control method of a kind of air conditioning unit electric expansion valve and adjusting means |
| CN103344069B (en) * | 2013-06-26 | 2015-09-30 | 广东美的制冷设备有限公司 | The control method of electric expansion valve and device |
| CN203464568U (en) * | 2013-07-08 | 2014-03-05 | 南京天加空调设备有限公司 | Electronic expansion valve control device |
-
2014
- 2014-05-20 CN CN201410213885.3A patent/CN105091440B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105091440A (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105091440B (en) | The control method and device of electric expansion valve | |
| CN106152382B (en) | A kind of control method and system for preventing frequency of air condition compressor to fluctuate | |
| US20170241690A1 (en) | Compressor Capacity Modulation System For Multiple Compressors | |
| KR100423681B1 (en) | Method for controlling an electronic expansion valve based on cooler pinch and discharge superheat | |
| CN104110768B (en) | Air-conditioner control method for electronic expansion valve and control circuit | |
| CN107120786B (en) | The control method and device of interior machine restricting element in air conditioner and air conditioner | |
| CN105091204A (en) | Control method of multi-split system | |
| CN104913449B (en) | Control method, control system and mobile air-conditioner | |
| WO2018233147A1 (en) | Fresh air blower and control method and apparatus therefor | |
| CN107421177A (en) | Three degrees of superheat adjust the air-conditioning and its control method of electric expansion valve | |
| CN103851847A (en) | System and method for controlling electronic expansion valve of air conditioner, and multi-split air conditioner outdoor unit | |
| CN107300243A (en) | Air-conditioning system, wind shelves adjusting method and computer-readable recording medium | |
| US10704817B2 (en) | Capacity staging system for multiple compressors | |
| CN105371403B (en) | Frequency conversion air-cooled formula air-conditioner set and control method | |
| WO2017167232A1 (en) | Air conditioning system, and control system and control method for air conditioning system | |
| CN105698451B (en) | A kind of control method system and refrigerator for preventing the dirty stifled damage of electric expansion valve | |
| CN104006445A (en) | Multi-linkage air conditioner and control method thereof | |
| CN106288243A (en) | The defrosting control method of air-conditioner and device | |
| CN107894077A (en) | Air conditioner and its control method, control device and computer-readable recording medium | |
| CN109340992B (en) | Operation method and system for controlling reliability of air conditioner and air conditioner | |
| CN108800465A (en) | Air conditioning control method, air conditioning control device and electronic equipment | |
| WO2019237960A1 (en) | Air conditioner control method, air conditioner control apparatus, and air conditioner having same | |
| CN107504729B (en) | Method, device and storage medium for controlling expansion valve of enhanced vapor injection system | |
| CN108800421A (en) | Control method, device and the air-conditioning with it of air-conditioning | |
| US20120117995A1 (en) | Energy Saving Device And Method For Cooling And Heating Apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |