CN105466093B - The pressure at expulsion of compressor and the virtual detection method and device of back pressure - Google Patents
The pressure at expulsion of compressor and the virtual detection method and device of back pressure Download PDFInfo
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- CN105466093B CN105466093B CN201510793975.9A CN201510793975A CN105466093B CN 105466093 B CN105466093 B CN 105466093B CN 201510793975 A CN201510793975 A CN 201510793975A CN 105466093 B CN105466093 B CN 105466093B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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Abstract
The invention provides a kind of pressure at expulsion of compressor in refrigeration system and the virtual detection method and device of back pressure, wherein, refrigeration system comprises at least indoor heat exchanger, outdoor heat exchanger and compressor, and the virtual detection method of the pressure at expulsion of compressor includes：Obtain the saturated-steam temperature in the outdoor heat exchanger；According to the saturated-steam temperature in the outdoor heat exchanger, the saturated vapour pressure in the outdoor heat exchanger is determined；According to the drop formula of refrigeration system, the voltage drop value between the saturated vapour pressure in the pressure at expulsion and the outdoor heat exchanger of the compressor is calculated；The pressure at expulsion of the compressor is calculated according to the saturated vapour pressure in the voltage drop value and the outdoor heat exchanger.Not only cost is low for technical scheme, and without being detected again after the pipeline of refrigeration system is cut, detection process is convenient, simple.
Description
Technical field
The present invention relates to refrigeration system technical field, in particular to a kind of exhaust pressure of compressor in refrigeration system
In the virtual detection method of power, a kind of refrigeration system in the virtual detection method and a kind of refrigeration system of the back pressure of compressor
The pressure at expulsion of compressor and the virtual detector of back pressure.
Background technology
Pressure parameter in air-conditioning system running is extremely important for the situation for analyzing whole system, commonly used to sentence
Disconnected degree of supercooling, the degree of superheat and air-conditioning fault diagnosis.In addition, pressure parameter is the analysis indispensable ginseng of Performance for Air Conditioning Systems
Number, therefore limits its application in air-conditioning system due to pressure checking device costly.Simultaneously as pressure detecting
Signal piping pressure after equipment generally requires to cut pipeline in detection, this just brings that system is unstable and secondary refrigerant leakage etc.
Problem.
Therefore, how to be easily back pressure to the pressure at expulsion of air-conditioning system compressor in the process of running into
For technical problem urgently to be resolved hurrily.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art or correlation technique.
Therefore, it is an object of the present invention to propose the pressure at expulsion of compressor and return-air pressure in a kind of refrigeration system
The virtual detection scheme of power, not only cost is low, and can simply, easily detect the pressure at expulsion and return-air pressure of compressor
Power.
To achieve the above object, embodiment according to the first aspect of the invention, it is proposed that compressed in a kind of refrigeration system
The virtual detection method of the pressure at expulsion of machine, the refrigeration system comprise at least indoor heat exchanger, outdoor heat exchanger and the pressure
Contracting machine, the virtual detection method, including：Obtain the saturated-steam temperature in the outdoor heat exchanger；Changed according to the outdoor
Saturated-steam temperature in hot device, determine the saturated vapour pressure in the outdoor heat exchanger；It is public according to the pressure drop of refrigeration system
Formula, calculate the voltage drop value between the saturated vapour pressure in the pressure at expulsion and the outdoor heat exchanger of the compressor；According to
Saturated vapour pressure in the voltage drop value and the outdoor heat exchanger calculates the pressure at expulsion of the compressor.
The virtual detection method of the pressure at expulsion of compressor, passes through basis in refrigeration system according to an embodiment of the invention
Saturated-steam temperature in outdoor heat exchanger, the saturated vapour pressure in outdoor heat exchanger is determined, and calculated according to drop formula
The voltage drop value gone out between the saturated vapour pressure in the pressure at expulsion and outdoor heat exchanger of compressor, enabling according to voltage drop value
With the saturated vapour pressure in outdoor heat exchanger, the pressure at expulsion of compressor is calculated, compared to passing through pressure in correlation technique
The scheme that power detection device is detected, not only cost is low for detection scheme of the invention, and without entering again after pipeline is cut
Row detection, detection process are convenient, simple.
According to one embodiment of present invention, the step of obtaining the saturated-steam temperature in the outdoor heat exchanger is specifically wrapped
Include：The thermo parameters method of the outdoor heat exchanger when refrigeration system is run under different operating modes is simulated, to determine the room
Maximum probability section residing for saturated-steam temperature in external heat exchanger；Choose the predetermined quantity in the maximum probability section
Temperature spot, calculates the average value of the predetermined quantity temperature spot, and using the average value of the predetermined quantity temperature spot as
Saturated-steam temperature in the outdoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of outdoor heat exchanger, to find out maximum probability section.
According to one embodiment of present invention, the step of determining the saturated vapour pressure in the outdoor heat exchanger is specifically wrapped
Include：According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the outdoor heat exchanger is steamed
Steam pressure.
According to one embodiment of present invention, in addition to：By the pressure at expulsion for detecting compressor described in units test；Will
The pressure at expulsion for the compressor being calculated and the pressure at expulsion of the compressor detected by the detection device
It is compared, to obtain comparative result；Drop formula based on refrigeration system described in the comparative result amendment.
The virtual detection method of the pressure at expulsion of compressor in refrigeration system according to an embodiment of the invention, by that will count
The pressure at expulsion of obtained compressor is based on comparative result compared with the pressure at expulsion detected by detecting device
Correct the drop formula of refrigeration system, enabling drop formula is carried out according to the error between calculated value and actual value
When correcting, and then ensureing subsequently to detect again, more accurate pressure value can be obtained.
According to one embodiment of present invention, according to the saturated vapour pressure in the voltage drop value and the outdoor heat exchanger
The step of pressure at expulsion for calculating the compressor, specifically includes：Calculate the saturation in the voltage drop value and the outdoor heat exchanger
Steam pressure sum, using the pressure at expulsion as the compressor.
A kind of embodiment according to a second aspect of the present invention, it is also proposed that the void of the back pressure of compressor in refrigeration system
Intend detection method, the refrigeration system comprises at least indoor heat exchanger, outdoor heat exchanger and the compressor, the virtual detection
Method, including：Obtain the saturated-steam temperature in the indoor heat exchanger；According to the saturated vapor temperature in the indoor heat exchanger
Degree, determines the saturated vapour pressure in the indoor heat exchanger；According to the drop formula of refrigeration system, the indoor heat exchange is calculated
Saturated vapour pressure in device and the voltage drop value between the back pressure of the compressor；According to the voltage drop value and the interior
The saturated vapour pressure of heat exchanger calculates the back pressure of the compressor.
The virtual detection method of the back pressure of compressor, passes through basis in refrigeration system according to an embodiment of the invention
Saturated-steam temperature in indoor heat exchanger, the saturated vapour pressure in indoor heat exchanger is determined, and calculated according to drop formula
The voltage drop value gone out between the saturated vapour pressure in indoor heat exchanger and the back pressure of compressor, enabling changed according to interior
Saturated vapour pressure and voltage drop value in hot device, the back pressure of compressor is calculated, compared to passing through pressure in correlation technique
The scheme that power detection device is detected, not only cost is low for detection scheme of the invention, and without entering again after pipeline is cut
Row detection, detection process are convenient, simple.
According to one embodiment of present invention, the saturated-steam temperature step obtained in the indoor heat exchanger is specifically wrapped
Include：The thermo parameters method of the indoor heat exchanger when refrigeration system is run under different operating modes is simulated, to determine the room
Maximum probability section residing for saturated-steam temperature in interior heat exchanger；Choose the predetermined quantity in the maximum probability section
Temperature spot, calculates the average value of the predetermined quantity temperature spot, and using the average value of the predetermined quantity temperature spot as
Saturated-steam temperature in the indoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of indoor heat exchanger, to find out maximum probability section.
According to one embodiment of present invention, the step of determining the saturated vapour pressure in the indoor heat exchanger is specifically wrapped
Include：According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the indoor heat exchanger is steamed
Steam pressure.
According to one embodiment of present invention, in addition to：By the back pressure for detecting compressor described in units test；Will
The back pressure for the compressor being calculated and the back pressure of the compressor detected by the detection device
It is compared, to obtain comparative result；Drop formula based on refrigeration system described in the comparative result amendment.
The virtual detection method of the back pressure of compressor in refrigeration system according to an embodiment of the invention, by that will count
The back pressure of obtained compressor is based on comparative result compared with the back pressure detected by detecting device
Correct the drop formula of refrigeration system, enabling drop formula is carried out according to the error between calculated value and actual value
When correcting, and then ensureing subsequently to detect again, more accurate pressure value can be obtained.
According to one embodiment of present invention, according to the voltage drop value and the saturated vapour pressure meter of the indoor heat exchanger
The step of back pressure for calculating the compressor, specifically includes：
The difference of the saturated vapour pressure and the voltage drop value in the indoor heat exchanger is calculated, to be used as the compressor
Back pressure.
Embodiment according to a third aspect of the present invention, it is also proposed that in a kind of refrigeration system the pressure at expulsion of compressor and return
The virtual detector of atmospheric pressure, the refrigeration system comprise at least indoor heat exchanger, outdoor heat exchanger and the compressor, institute
Virtual detector is stated, including：Acquiring unit, for obtaining saturated-steam temperature and the outdoor in the indoor heat exchanger
Saturated-steam temperature in heat exchanger；Determining unit, for according to the saturated-steam temperature in the indoor heat exchanger and described
Saturated-steam temperature in outdoor heat exchanger, determine the saturated vapour pressure in the indoor heat exchanger and the outdoor heat exchanger
Interior saturated vapour pressure；First computing unit, for the drop formula according to refrigeration system, the compressor is calculated respectively
The first voltage drop value between saturated vapour pressure in pressure at expulsion and the outdoor heat exchanger, and in the indoor heat exchanger
Saturated vapour pressure and the compressor back pressure between the second voltage drop value；Second computing unit, for according to institute
The pressure at expulsion that the saturated vapour pressure in the first voltage drop value and the outdoor heat exchanger calculates the compressor is stated, and according to institute
State the back pressure of the saturated vapour pressure calculating compressor of the second voltage drop value and the indoor heat exchanger.
The pressure at expulsion of compressor and the virtual detection of back pressure dress in refrigeration system according to an embodiment of the invention
Put, by according to the saturated-steam temperature in the saturated-steam temperature and outdoor heat exchanger in indoor heat exchanger, it is determined that interior is changed
The saturated vapour pressure in saturated vapour pressure and outdoor heat exchanger in hot device, and compressor is calculated according to drop formula
The first voltage drop value between saturated vapour pressure in pressure at expulsion and outdoor heat exchanger, and the saturation steaming in indoor heat exchanger
The second voltage drop value between steam pressure and the back pressure of compressor, enabling according in the first voltage drop value and outdoor heat exchanger
Saturated vapour pressure, the pressure at expulsion of compressor is calculated, and can be according to the saturated vapour pressure in indoor heat exchanger
With the second voltage drop value, the back pressure of compressor is calculated, is examined compared in correlation technique by pressure checking device
The scheme of survey, not only cost is low for detection scheme of the invention, and without being detected again after pipeline is cut, detection process side
Just, simply.
The virtual inspection of the pressure at expulsion of compressor and back pressure in refrigeration system according to the abovementioned embodiments of the present invention
Device is surveyed, there can also be following technical characteristic：
According to one embodiment of present invention, the acquiring unit includes：Processing unit, for simulating the refrigeration system
The thermo parameters method of the indoor heat exchanger and outdoor heat exchanger when being run under different operating modes, to determine that the interior is changed
The saturated-steam temperature institute in the first maximum probability section and the outdoor heat exchanger residing for saturated-steam temperature in hot device
The second maximum probability section at place；3rd computing unit, for choosing the first predetermined number in the first maximum probability section
An amount temperature spot, calculates the average value of the first predetermined quantity temperature spot, and by the first predetermined quantity temperature spot
Average value as the saturated-steam temperature in the indoor heat exchanger, and for choosing in the second maximum probability section
Second predetermined quantity temperature spot, calculates the average value of the second predetermined quantity temperature spot, and by second predetermined number
The average value of amount temperature spot is as the saturated-steam temperature in the outdoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of indoor heat exchanger and outdoor heat exchanger, to find out the first maximum probability section and the second maximum probability
Section.Wherein, the first predetermined quantity and the second predetermined quantity can be identicals.
According to one embodiment of present invention, the determining unit is specifically used for：Steamed according to saturated-steam temperature and saturation
Corresponding relation between steam pressure, determine full in the saturated vapour pressure and the outdoor heat exchanger in the indoor heat exchanger
And steam pressure.
According to one embodiment of present invention, in addition to：Detection unit, for detecting the pressure respectively by detecting device
The back pressure of the pressure at expulsion of contracting machine and the compressor；Comparing unit, for second computing unit to be calculated
The compressor pressure at expulsion and back pressure and the detection unit pass through the pressure that the detection device detects
The pressure at expulsion and back pressure of contracting machine are compared, to obtain comparative result；Amending unit, for based on the comparative result
Correct the drop formula of the refrigeration system.
The pressure at expulsion of compressor and the virtual detection of back pressure dress in refrigeration system according to an embodiment of the invention
Put, by by the pressure at expulsion for the compressor being calculated and back pressure with by detect pressure at expulsion that device detects and
Back pressure is compared, and based on the drop formula of comparative result amendment refrigeration system, enabling according to calculated value
Error between actual value is modified to drop formula, and then ensures that it is more accurate to obtain when subsequently detecting again
Pressure value.
According to one embodiment of present invention, second computing unit is specifically used for：Calculate first voltage drop value and
Saturated vapour pressure sum in the outdoor heat exchanger, using the pressure at expulsion as the compressor, and it is described for calculating
The difference of saturated vapour pressure and second voltage drop value in indoor heat exchanger, using the back pressure as the compressor.
Embodiment according to the third aspect of the invention we, it is also proposed that a kind of air conditioner, including：Such as above-mentioned any embodiment
Described in refrigeration system in the pressure at expulsion of compressor and the virtual detector of back pressure.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 shows the virtual detection method of the pressure at expulsion of compressor in refrigeration system according to an embodiment of the invention
Schematic flow diagram；
Fig. 2 shows the virtual detection method of the back pressure of compressor in refrigeration system according to an embodiment of the invention
Schematic flow diagram；
Fig. 3 shows the pressure at expulsion of compressor and the void of back pressure in refrigeration system according to an embodiment of the invention
Intend the schematic flow diagram of detection method；
Fig. 4 shows the pressure at expulsion of compressor and the void of back pressure in refrigeration system according to an embodiment of the invention
Intend the schematic block diagram of detection means；
Fig. 5 shows the schematic block diagram of air conditioner according to an embodiment of the invention.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be different from other modes described here using other to implement, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 1 shows the virtual detection method of the pressure at expulsion of compressor in refrigeration system according to an embodiment of the invention
Schematic flow diagram.
Refrigeration system of the present invention comprises at least indoor heat exchanger, outdoor heat exchanger and compressor.As shown in figure 1,
The virtual detection method of the pressure at expulsion of compressor in refrigeration system according to an embodiment of the invention, including：
Step 102, the saturated-steam temperature in the outdoor heat exchanger is obtained；
Step 104, according to the saturated-steam temperature in the outdoor heat exchanger, the saturation in the outdoor heat exchanger is determined
Steam pressure；
Step 106, according to the drop formula of refrigeration system, the pressure at expulsion of the compressor and the outdoor heat exchange are calculated
The voltage drop value between saturated vapour pressure in device；
Step 108, the compressor is calculated according to the saturated vapour pressure in the voltage drop value and the outdoor heat exchanger
Pressure at expulsion.
By according to the saturated-steam temperature in outdoor heat exchanger, determining the saturated vapour pressure in outdoor heat exchanger, and
The voltage drop value between the saturated vapour pressure in the pressure at expulsion and outdoor heat exchanger of compressor is calculated according to drop formula, is made
Obtaining according to the saturated vapour pressure in voltage drop value and outdoor heat exchanger, can be calculated the pressure at expulsion of compressor, compared to
The scheme detected in correlation technique by pressure checking device, not only cost is low for detection scheme of the invention, and need not
Detected again after pipeline is cut, detection process is convenient, simple.
According to one embodiment of present invention, the step of obtaining the saturated-steam temperature in the outdoor heat exchanger is specifically wrapped
Include：The thermo parameters method of the outdoor heat exchanger when refrigeration system is run under different operating modes is simulated, to determine the room
Maximum probability section residing for saturated-steam temperature in external heat exchanger；Choose the predetermined quantity in the maximum probability section
Temperature spot, calculates the average value of the predetermined quantity temperature spot, and using the average value of the predetermined quantity temperature spot as
Saturated-steam temperature in the outdoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of outdoor heat exchanger, to find out maximum probability section.
According to one embodiment of present invention, the step of determining the saturated vapour pressure in the outdoor heat exchanger is specifically wrapped
Include：According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the outdoor heat exchanger is steamed
Steam pressure.
According to one embodiment of present invention, in addition to：By the pressure at expulsion for detecting compressor described in units test；Will
The pressure at expulsion for the compressor being calculated and the pressure at expulsion of the compressor detected by the detection device
It is compared, to obtain comparative result；Drop formula based on refrigeration system described in the comparative result amendment.
By the way that the pressure at expulsion for the compressor being calculated is compared with the pressure at expulsion detected by detecting device
Compared with, and based on the drop formula of comparative result amendment refrigeration system, enabling according between calculated value and actual value
Error is modified to drop formula, and then ensures follow-up when detecting again, can obtain more accurate pressure value.
According to one embodiment of present invention, according to the saturated vapour pressure in the voltage drop value and the outdoor heat exchanger
The step of pressure at expulsion for calculating the compressor, specifically includes：Calculate the saturation in the voltage drop value and the outdoor heat exchanger
Steam pressure sum, using the pressure at expulsion as the compressor.
Fig. 2 shows the virtual detection method of the back pressure of compressor in refrigeration system according to an embodiment of the invention
Schematic flow diagram.
Refrigeration system of the present invention comprises at least indoor heat exchanger, outdoor heat exchanger and compressor.As shown in Fig. 2
The virtual detection method of the back pressure of compressor in refrigeration system according to an embodiment of the invention, including：
Step 202, the saturated-steam temperature in the indoor heat exchanger is obtained；
Step 204, according to the saturated-steam temperature in the indoor heat exchanger, the saturation in the indoor heat exchanger is determined
Steam pressure；
Step 206, according to the drop formula of refrigeration system, the saturated vapour pressure in the indoor heat exchanger and institute are calculated
State the voltage drop value between the back pressure of compressor；
Step 208, the compressor is calculated according to the saturated vapour pressure of the voltage drop value and the indoor heat exchanger
Back pressure.
By according to the saturated-steam temperature in indoor heat exchanger, determining the saturated vapour pressure in indoor heat exchanger, and
The voltage drop value between the back pressure of the saturated vapour pressure and compressor in indoor heat exchanger is calculated according to drop formula, is made
Obtaining according to the saturated vapour pressure and voltage drop value in indoor heat exchanger, can be calculated the back pressure of compressor, compared to
The scheme detected in correlation technique by pressure checking device, not only cost is low for detection scheme of the invention, and need not
Detected again after pipeline is cut, detection process is convenient, simple.
According to one embodiment of present invention, the saturated-steam temperature step obtained in the indoor heat exchanger is specifically wrapped
Include：The thermo parameters method of the indoor heat exchanger when refrigeration system is run under different operating modes is simulated, to determine the room
Maximum probability section residing for saturated-steam temperature in interior heat exchanger；Choose the predetermined quantity in the maximum probability section
Temperature spot, calculates the average value of the predetermined quantity temperature spot, and using the average value of the predetermined quantity temperature spot as
Saturated-steam temperature in the indoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of indoor heat exchanger, to find out maximum probability section.
According to one embodiment of present invention, the step of determining the saturated vapour pressure in the indoor heat exchanger is specifically wrapped
Include：According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the indoor heat exchanger is steamed
Steam pressure.
According to one embodiment of present invention, in addition to：By the back pressure for detecting compressor described in units test；Will
The back pressure for the compressor being calculated and the back pressure of the compressor detected by the detection device
It is compared, to obtain comparative result；Drop formula based on refrigeration system described in the comparative result amendment.
By the way that the back pressure for the compressor being calculated is compared with the back pressure detected by detecting device
Compared with, and based on the drop formula of comparative result amendment refrigeration system, enabling according between calculated value and actual value
Error is modified to drop formula, and then ensures follow-up when detecting again, can obtain more accurate pressure value.
According to one embodiment of present invention, according to the voltage drop value and the saturated vapour pressure meter of the indoor heat exchanger
The step of back pressure for calculating the compressor, specifically includes：
The difference of the saturated vapour pressure and the voltage drop value in the indoor heat exchanger is calculated, to be used as the compressor
Back pressure.
Fig. 3 shows the pressure at expulsion of compressor and the void of back pressure in refrigeration system according to an embodiment of the invention
Intend the schematic flow diagram of detection method.
Refrigeration system of the present invention comprises at least indoor heat exchanger, outdoor heat exchanger and compressor.As shown in figure 3,
The pressure at expulsion of compressor and the virtual detection method of back pressure in refrigeration system according to an embodiment of the invention, including：
Step 302, the saturation obtained in the saturated-steam temperature and the outdoor heat exchanger in the indoor heat exchanger is steamed
Stripping temperature；
Step 304, steamed according to the saturation in the saturated-steam temperature in the indoor heat exchanger and the outdoor heat exchanger
Stripping temperature, determine the saturated vapour pressure in the saturated vapour pressure and the outdoor heat exchanger in the indoor heat exchanger；
Step 306, according to the drop formula of refrigeration system, the pressure at expulsion of the compressor and the outdoor are calculated respectively
The first voltage drop value between saturated vapour pressure in heat exchanger, and the saturated vapour pressure in the indoor heat exchanger and institute
State the second voltage drop value between the back pressure of compressor；
Step 308, the pressure is calculated according to the saturated vapour pressure in first voltage drop value and the outdoor heat exchanger
The pressure at expulsion of contracting machine, and the compression is calculated according to the saturated vapour pressure of second voltage drop value and the indoor heat exchanger
The back pressure of machine.
By according to the saturated-steam temperature in the saturated-steam temperature and outdoor heat exchanger in indoor heat exchanger, determining room
The saturated vapour pressure in saturated vapour pressure and outdoor heat exchanger in interior heat exchanger, and compression is calculated according to drop formula
The first voltage drop value between saturated vapour pressure in the pressure at expulsion and outdoor heat exchanger of machine, and it is full in indoor heat exchanger
The second voltage drop value between steam pressure and the back pressure of compressor, enabling according to the first voltage drop value and outdoor heat exchange
Saturated vapour pressure in device, the pressure at expulsion of compressor is calculated, and can be according to the saturated vapor in indoor heat exchanger
Pressure and the second voltage drop value, the back pressure of compressor is calculated, is entered compared in correlation technique by pressure checking device
The scheme of row detection, not only cost is low for detection scheme of the invention, and without being detected again after pipeline is cut, detects
Journey is convenient, simple.
Wherein, refrigeration system can be the refrigeration system in air conditioner.
The virtual inspection of the pressure at expulsion of compressor and back pressure in refrigeration system according to the abovementioned embodiments of the present invention
Survey method, there can also be following technical characteristic：
According to one embodiment of present invention, obtain the saturated-steam temperature in the indoor heat exchanger and the outdoor is changed
The step of saturated-steam temperature in hot device, specifically includes：
Simulate the temperature of the indoor heat exchanger and the outdoor heat exchanger when refrigeration system is run under different operating modes
Field distribution is spent, to determine the first maximum probability section and the outdoor residing for the saturated-steam temperature in the indoor heat exchanger
The second maximum probability section residing for saturated-steam temperature in heat exchanger；Choose first in the first maximum probability section
Predetermined quantity temperature spot, the average value of the first predetermined quantity temperature spot is calculated, and first predetermined quantity is individual
The average value of temperature spot is as the saturated-steam temperature in the indoor heat exchanger；And choose the second maximum probability section
The second interior predetermined quantity temperature spot, the average value of the second predetermined quantity temperature spot is calculated, and it is pre- by described second
The average value of fixed number amount temperature spot is as the saturated-steam temperature in the outdoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of indoor heat exchanger and outdoor heat exchanger, to find out the first maximum probability section and the second maximum probability
Section.Wherein, the first predetermined quantity and the second predetermined quantity can be identicals.
According to one embodiment of present invention, determine that the saturated vapour pressure in the indoor heat exchanger and the outdoor are changed
The step of saturated vapour pressure in hot device, specifically includes：According to the corresponding pass between saturated-steam temperature and saturated vapour pressure
System, determines the saturated vapour pressure in the saturated vapour pressure and the outdoor heat exchanger in the indoor heat exchanger.
According to one embodiment of present invention, in addition to：Detect the exhaust pressure of the compressor respectively by detecting device
The back pressure of power and the compressor；By the pressure at expulsion for the compressor being calculated and back pressure with by described
The pressure at expulsion and back pressure for the compressor that detection device detects are compared, to obtain comparative result；Based on institute
State the drop formula of refrigeration system described in comparative result amendment.
Pass through the exhaust detected by the pressure at expulsion for the compressor being calculated and back pressure and by detecting device
Pressure and back pressure are compared, and based on the drop formula of comparative result amendment refrigeration system, enabling according to theory
Error between calculated value and actual value is modified to drop formula, and then ensures follow-up when detecting again, can be obtained more
Add accurate pressure value.
According to one embodiment of present invention, according to the saturated vapor in first voltage drop value and the outdoor heat exchanger
The pressure at expulsion of compressor described in calculation of pressure, and according to second voltage drop value and the saturated vapor pressure of the indoor heat exchanger
The step of back pressure of the power calculating compressor, specifically includes：Calculate in first voltage drop value and the outdoor heat exchanger
Saturated vapour pressure sum, using the pressure at expulsion as the compressor；And the saturation in the calculating indoor heat exchanger
The difference of steam pressure and second voltage drop value, using the back pressure as the compressor.
Fig. 4 shows the pressure at expulsion of compressor and the void of back pressure in refrigeration system according to an embodiment of the invention
Intend the schematic block diagram of detection means.
Refrigeration system of the present invention comprises at least indoor heat exchanger, outdoor heat exchanger and compressor.As shown in figure 4,
The virtual detector 400 of the pressure at expulsion of compressor and back pressure in refrigeration system according to an embodiment of the invention, bag
Include：Acquiring unit 402, determining unit 404, the first computing unit 406 and the second computing unit 408.
Wherein, acquiring unit 402, for obtaining saturated-steam temperature and the outdoor heat exchange in the indoor heat exchanger
Saturated-steam temperature in device；Determining unit 404, for according to the saturated-steam temperature in the indoor heat exchanger and the room
Saturated-steam temperature in external heat exchanger, determine in the saturated vapour pressure and the outdoor heat exchanger in the indoor heat exchanger
Saturated vapour pressure；First computing unit 406, for the drop formula according to refrigeration system, the compressor is calculated respectively
Pressure at expulsion and the outdoor heat exchanger in saturated vapour pressure between the first voltage drop value, and the indoor heat exchanger
The second voltage drop value between interior saturated vapour pressure and the back pressure of the compressor；Second computing unit 408, for root
The pressure at expulsion of the compressor, and root are calculated according to the saturated vapour pressure in first voltage drop value and the outdoor heat exchanger
The back pressure of the compressor is calculated according to the saturated vapour pressure of second voltage drop value and the indoor heat exchanger.
By according to the saturated-steam temperature in the saturated-steam temperature and outdoor heat exchanger in indoor heat exchanger, determining room
The saturated vapour pressure in saturated vapour pressure and outdoor heat exchanger in interior heat exchanger, and compression is calculated according to drop formula
The first voltage drop value between saturated vapour pressure in the pressure at expulsion and outdoor heat exchanger of machine, and it is full in indoor heat exchanger
The second voltage drop value between steam pressure and the back pressure of compressor, enabling according to the first voltage drop value and outdoor heat exchange
Saturated vapour pressure in device, the pressure at expulsion of compressor is calculated, and can be according to the saturated vapor in indoor heat exchanger
Pressure and the second voltage drop value, the back pressure of compressor is calculated, is entered compared in correlation technique by pressure checking device
The scheme of row detection, not only cost is low for detection scheme of the invention, and without being detected again after pipeline is cut, detects
Journey is convenient, simple.
The virtual inspection of the pressure at expulsion of compressor and back pressure in refrigeration system according to the abovementioned embodiments of the present invention
Device 400 is surveyed, there can also be following technical characteristic：
According to one embodiment of present invention, the acquiring unit 402 includes：Processing unit 4022, it is described for simulating
The thermo parameters method of the indoor heat exchanger and outdoor heat exchanger when refrigeration system is run under different operating modes, to determine
The saturation stated in the first maximum probability section and the outdoor heat exchanger residing for the saturated-steam temperature in indoor heat exchanger is steamed
The second maximum probability section residing for stripping temperature；3rd computing unit 4024, for choosing in the first maximum probability section
The first predetermined quantity temperature spot, calculate the average value of the first predetermined quantity temperature spot, and described first is made a reservation for
The average value of quantity temperature spot is used to choose second maximum as the saturated-steam temperature in the indoor heat exchanger
The second predetermined quantity temperature spot in probability interval, calculates the average value of the second predetermined quantity temperature spot, and by institute
The average value of the second predetermined quantity temperature spot is stated as the saturated-steam temperature in the outdoor heat exchanger.
Specifically, can be transported by Fluent softwares to simulate refrigeration system under different operating modes (being preferably typical condition)
During row, the thermo parameters method of indoor heat exchanger and outdoor heat exchanger, to find out the first maximum probability section and the second maximum probability
Section.Wherein, the first predetermined quantity and the second predetermined quantity can be identicals.
According to one embodiment of present invention, the determining unit 404 is specifically used for：According to saturated-steam temperature and saturation
Corresponding relation between steam pressure, determine in the saturated vapour pressure and the outdoor heat exchanger in the indoor heat exchanger
Saturated vapour pressure.
According to one embodiment of present invention, in addition to：Detection unit 410, for detecting institute respectively by detecting device
State the pressure at expulsion of compressor and the back pressure of the compressor；Comparing unit 412, for by second computing unit
The pressure at expulsion and back pressure of 408 compressors being calculated pass through the detection device with the detection unit 410
The pressure at expulsion and back pressure of the compressor detected are compared, to obtain comparative result；Amending unit 414, use
In the drop formula based on refrigeration system described in the comparative result amendment.
Pass through the exhaust detected by the pressure at expulsion for the compressor being calculated and back pressure and by detecting device
Pressure and back pressure are compared, and based on the drop formula of comparative result amendment refrigeration system, enabling according to theory
Error between calculated value and actual value is modified to drop formula, and then ensures follow-up when detecting again, can be obtained more
Add accurate pressure value.
According to one embodiment of present invention, second computing unit 408 is specifically used for：Calculate first voltage drop value
With the saturated vapour pressure sum in the outdoor heat exchanger, using the pressure at expulsion as the compressor, and it is used to calculate institute
The difference of the saturated vapour pressure and second voltage drop value in indoor heat exchanger is stated, using the back pressure as the compressor.
Fig. 5 shows the schematic block diagram of air conditioner according to an embodiment of the invention.
As shown in figure 5, air conditioner 500 according to an embodiment of the invention, including：In refrigeration system as shown in Figure 4
The pressure at expulsion of compressor and the virtual detector 400 of back pressure.
Below by taking the pressure at expulsion of the compressor in the refrigeration system for detecting air conditioner and back pressure as an example, to the present invention
Technical scheme be described further.
In a preferred embodiment of the invention, mainly propose to air conditioner compressor air-discharging pressure in the process of running
The virtual detection method of power and back pressure, specifically, including：
1st, using fluent software sunykatuib analysis air-conditioning systems under different typical conditions evaporator (i.e. room in running
Interior heat exchanger) with the thermo parameters method of condenser (i.e. outdoor heat exchanger), Binding experiment find the most general of saturated-steam temperature
Rate section.
2nd, multiple temperature sensors are distributed in maximum probability section to obtain mean temperature, to be used as saturated vapor temperature
Degree, and then according to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine the saturation pressure force P of evaporator
(Tse) and condenser saturation pressure force P (Tsc).
Specifically, the corresponding maximum probability section of saturation temperature point is found with Experimental comparison by repeatedly simulating, in this area
Between arrange N number of temperature sensor, regard the average value of N number of temperature parameter as saturated-steam temperature, i.e. Ts=(Ts1+Ts2+…..+
TsN)/N, according to the corresponding relation between saturation temperature and saturation pressure, be i.e. Ps=P (Ts), saturation in condenser can be obtained and steamed
Saturated vapour pressure P (Tse) in steam pressure P (Tsc) and evaporator.
3rd, the mathematical modeling established between temperature parameter and pressure parameter analyzes Compressor Discharge Pressure and condenser saturation
Pressure drop between pressure spot, i.e. △ Pc, and analyze the pressure between calculating evaporator saturation pressure force and compressor return air pressure spot
Drop, i.e. △ Pe.
Specifically, when analyzing pressure drop, according to the drop formula of tube runs：
Wherein, K is coefficient, and m is refrigerant mass fluxes.
Under declared working condition, equally have：
Two formulas above are compared and can obtained：
ΔP/ΔPrated=(m/mrated)2；
Due to m=β m be presentrated, β is coefficient, and numerical values recited corresponding to different operating modes is different.
I.e.Wherein Δ PratedThe parameter that can be dispatched from the factory according to compressor is obtained, and is fixed value.
Pressure drop computational methods more than can obtain △ Pc and the △ Pe under different operating modes.
4th, Compressor Discharge Pressure, i.e. Pd=P (Tsc)+△ Pc are calculated；And calculate the back pressure of compressor, i.e. Ps=P
(Tse)-△ Pe, and compared with pressure tool detection income value, correct the pressure value of virtual detection, can specifically correct pressure
Parameter value in formula drops.
Not only cost is low for virtual pressure detection method proposed by the present invention, and detects logic advantages of simple.
Technical scheme is described in detail above in association with accompanying drawing, the present invention proposes to be compressed in a kind of refrigeration system
The pressure at expulsion of machine and the virtual detection scheme of back pressure, not only cost is low, and can simply, easily detect compression
The pressure at expulsion and back pressure of machine.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (12)
1. a kind of virtual detection method of the pressure at expulsion of compressor in refrigeration system, it is characterised in that the refrigeration system is extremely
Include indoor heat exchanger, outdoor heat exchanger and the compressor less, the virtual detection method, including：
Obtain the saturated-steam temperature in the outdoor heat exchanger；
According to the saturated-steam temperature in the outdoor heat exchanger, the saturated vapour pressure in the outdoor heat exchanger is determined；
According to the drop formula of refrigeration system, the pressure at expulsion and the saturation in the outdoor heat exchanger for calculating the compressor are steamed
Voltage drop value between steam pressure；
The pressure at expulsion of the compressor is calculated according to the saturated vapour pressure in the voltage drop value and the outdoor heat exchanger；
The virtual detection method also includes：
By the pressure at expulsion for detecting compressor described in units test；
By the pressure at expulsion for the compressor being calculated and the row of the compressor detected by the detection device
Atmospheric pressure is compared, to obtain comparative result；
Drop formula based on refrigeration system described in the comparative result amendment.
2. the virtual detection method of the pressure at expulsion of compressor in refrigeration system according to claim 1, it is characterised in that
The step of obtaining the saturated-steam temperature in the outdoor heat exchanger specifically includes：
The thermo parameters method of the outdoor heat exchanger when refrigeration system is run under different operating modes is simulated, to determine the room
Maximum probability section residing for saturated-steam temperature in external heat exchanger；
The predetermined quantity temperature spot in the maximum probability section is chosen, calculates being averaged for the predetermined quantity temperature spot
Value, and using the average value of the predetermined quantity temperature spot as the saturated-steam temperature in the outdoor heat exchanger.
3. the virtual detection method of the pressure at expulsion of compressor in refrigeration system according to claim 1, it is characterised in that
The step of determining the saturated vapour pressure in the outdoor heat exchanger specifically includes：
According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the outdoor heat exchanger is steamed
Steam pressure.
4. the virtual detection method of the pressure at expulsion of compressor in refrigeration system according to any one of claim 1 to 3,
Characterized in that, the exhaust of the compressor is calculated according to the saturated vapour pressure in the voltage drop value and the outdoor heat exchanger
The step of pressure, specifically includes：
The saturated vapour pressure sum in the voltage drop value and the outdoor heat exchanger is calculated, using the exhaust as the compressor
Pressure.
5. a kind of virtual detection method of the back pressure of compressor in refrigeration system, it is characterised in that the refrigeration system is extremely
Include indoor heat exchanger, outdoor heat exchanger and the compressor less, the virtual detection method, including：
Obtain the saturated-steam temperature in the indoor heat exchanger；
According to the saturated-steam temperature in the indoor heat exchanger, the saturated vapour pressure in the indoor heat exchanger is determined；
According to the drop formula of refrigeration system, time of the saturated vapour pressure and the compressor in the indoor heat exchanger is calculated
Voltage drop value between atmospheric pressure；
The back pressure of the compressor is calculated according to the saturated vapour pressure of the voltage drop value and the indoor heat exchanger；
The virtual detection method also includes：
By the back pressure for detecting compressor described in units test；
By the back pressure for the compressor being calculated and time of the compressor detected by the detection device
Atmospheric pressure is compared, to obtain comparative result；
Drop formula based on refrigeration system described in the comparative result amendment.
6. the virtual detection method of the back pressure of compressor in refrigeration system according to claim 5, it is characterised in that
The saturated-steam temperature step obtained in the indoor heat exchanger specifically includes：
The thermo parameters method of the indoor heat exchanger when refrigeration system is run under different operating modes is simulated, to determine the room
Maximum probability section residing for saturated-steam temperature in interior heat exchanger；
The predetermined quantity temperature spot in the maximum probability section is chosen, calculates being averaged for the predetermined quantity temperature spot
Value, and using the average value of the predetermined quantity temperature spot as the saturated-steam temperature in the indoor heat exchanger.
7. the virtual detection method of the back pressure of compressor in refrigeration system according to claim 5, it is characterised in that
The step of determining the saturated vapour pressure in the indoor heat exchanger specifically includes：
According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the indoor heat exchanger is steamed
Steam pressure.
8. the virtual detection method of the back pressure of compressor in the refrigeration system according to any one of claim 5 to 7,
Characterized in that, the return-air pressure of the compressor is calculated according to the saturated vapour pressure of the voltage drop value and the indoor heat exchanger
The step of power, specifically includes：
The difference of the saturated vapour pressure and the voltage drop value in the indoor heat exchanger is calculated, using the return-air as the compressor
Pressure.
9. the virtual detector of the pressure at expulsion of compressor and back pressure in a kind of refrigeration system, it is characterised in that described
Refrigeration system comprises at least indoor heat exchanger, outdoor heat exchanger and the compressor, the virtual detector, including：
Acquiring unit, steamed for obtaining the saturation in saturated-steam temperature and the outdoor heat exchanger in the indoor heat exchanger
Stripping temperature；
Determining unit, for being steamed according to the saturation in the saturated-steam temperature in the indoor heat exchanger and the outdoor heat exchanger
Stripping temperature, determine the saturated vapour pressure in the saturated vapour pressure and the outdoor heat exchanger in the indoor heat exchanger；
First computing unit, for the drop formula according to refrigeration system, pressure at expulsion and the institute of the compressor are calculated respectively
State the first voltage drop value between the saturated vapour pressure in outdoor heat exchanger, and the saturated vapor pressure in the indoor heat exchanger
The second voltage drop value between the back pressure of power and the compressor；
Second computing unit, for calculating institute according to the saturated vapour pressure in first voltage drop value and the outdoor heat exchanger
The pressure at expulsion of compressor is stated, and according to calculating the saturated vapour pressure of second voltage drop value and the indoor heat exchanger
The back pressure of compressor；
The virtual detector also includes：
Detection unit, for detecting the pressure at expulsion of the compressor and the return-air pressure of the compressor respectively by detecting device
Power；
Comparing unit, for the pressure at expulsion of the compressor that second computing unit is calculated and back pressure with
The pressure at expulsion and back pressure for the compressor that the detection unit is detected by the detection device are compared, with
Obtain comparative result；
Amending unit, for the drop formula based on refrigeration system described in the comparative result amendment.
10. the virtual detector of the pressure at expulsion of compressor and back pressure in refrigeration system according to claim 9,
Characterized in that, the acquiring unit includes：
Processing unit, changed for simulating the indoor heat exchanger and the outdoor when refrigeration system is run under different operating modes
The thermo parameters method of hot device, with determine the first maximum probability section residing for the saturated-steam temperature in the indoor heat exchanger and
The second maximum probability section residing for saturated-steam temperature in the outdoor heat exchanger；
3rd computing unit, for choosing the first predetermined quantity temperature spot in the first maximum probability section, calculate institute
The average value of the first predetermined quantity temperature spot is stated, and using the average value of the first predetermined quantity temperature spot as the room
Saturated-steam temperature in interior heat exchanger, and for choosing the second predetermined quantity temperature in the second maximum probability section
Point, calculates the average value of the second predetermined quantity temperature spot, and by the average value of the second predetermined quantity temperature spot
As the saturated-steam temperature in the outdoor heat exchanger.
11. the virtual detector of the pressure at expulsion of compressor and back pressure in refrigeration system according to claim 9,
Characterized in that, the determining unit is specifically used for：
According to the corresponding relation between saturated-steam temperature and saturated vapour pressure, determine that the saturation in the indoor heat exchanger is steamed
Saturated vapour pressure in steam pressure and the outdoor heat exchanger.
12. the pressure at expulsion of compressor and back pressure in the refrigeration system according to any one of claim 9 to 11
Virtual detector, it is characterised in that second computing unit is specifically used for：
The saturated vapour pressure sum in first voltage drop value and the outdoor heat exchanger is calculated, to be used as the compressor
Pressure at expulsion, and for calculating the difference of saturated vapour pressure and second voltage drop value in the indoor heat exchanger, using as
The back pressure of the compressor.
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| CN106484999A (en) * | 2016-10-11 | 2017-03-08 | 江苏辛普森新能源有限公司 | A kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method |
| CN110207332A (en) * | 2019-06-11 | 2019-09-06 | 珠海格力电器股份有限公司 | Pressure detection method of air conditioner and air conditioner |
| CN113007861B (en) * | 2021-04-20 | 2022-07-12 | 宁波奥克斯电气股份有限公司 | Method and module for determining air suction side pressure, and control method, device and system |
| CN113007862B (en) * | 2021-04-20 | 2022-07-12 | 宁波奥克斯电气股份有限公司 | Air suction side pressure determining method and module, air conditioner control method and device and multi-split air conditioner |
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