CN105626499B - The low-voltage variation method and device of compressor of air conditioner - Google Patents
The low-voltage variation method and device of compressor of air conditioner Download PDFInfo
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- CN105626499B CN105626499B CN201610144843.8A CN201610144843A CN105626499B CN 105626499 B CN105626499 B CN 105626499B CN 201610144843 A CN201610144843 A CN 201610144843A CN 105626499 B CN105626499 B CN 105626499B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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Abstract
The invention discloses a kind of low-voltage variation method of compressor of air conditioner, including：The temperature value of the multiple temperature sensors collection set in monitoring predeterminable area, and the compressor return air pressure value in compressor of air conditioner return line is calculated according to temperature value；When compressor return air pressure value is less than limit pressure, compressor instruction out of service is sent to air conditioner electric control device, so that air conditioner electric control device is out of service based on compressor instruction control compressor of air conditioner out of service.The invention also discloses a kind of low-voltage protection device of compressor of air conditioner.The present invention, which is realized, can monitor the operation conditions of compressor of air conditioner in real time, and the operation conditions based on the compressor of air conditioner makes corresponding adjustment to the compressor of air conditioner.
Description
Technical field
The present invention relates to the low-voltage variation method and dress of refrigeration and air-conditioning technical field, more particularly to a kind of compressor of air conditioner
Put.
Background technology
In air-conditioning system running, evaporimeter frosting can be caused if the low pressure value of evaporator is too small, liquid is returned
Phenomenon, then damages air-conditioning system.Therefore low tension switch is usually provided with the compressor return air pipeline of existing air-conditioning system,
For monitoring the evaporator low pressure value in air-conditioning system.When evaporator low pressure value is less than limit pressure, compression
Low tension switch disconnects in machine return line, cuts off the power supply of compressor return air pipeline；Or, when evaporator low pressure value is less than
During limit pressure, the signal that low tension switch will be switched off on compressor return air pipeline feeds back to the electric-controlled plate of air-conditioning system, by electricity
Control plate to control compressor shutdown, so as to play a part of protecting air-conditioning system.But, because existing protected mode is only logical
Cross the ON/OFF of low-voltage protective switch to realize protective effect, it is impossible to the operation conditions of monitoring compressor of air conditioner, and be based on being somebody's turn to do in real time
The operation conditions of compressor of air conditioner makes corresponding adjustment to the compressor of air conditioner.Therefore, the pressure in air-conditioning system is currently passed through
Low tension switch is set to detect that evaporator low pressure value has limitation in contracting machine return line.
The content of the invention
It is a primary object of the present invention to provide a kind of low-voltage variation method and device of compressor of air conditioner, it is intended to solve to work as
It is preceding to detect that evaporator low pressure value has limitation by setting low tension switch on the compressor return air pipeline of air-conditioning system
The problem of property.
To achieve the above object, the low-voltage variation method for a kind of compressor of air conditioner that the present invention is provided, including：
The temperature value of the multiple temperature sensors collection set in monitoring predeterminable area, and calculated according to the temperature value
Compressor return air pressure value in compressor of air conditioner return line；
When the compressor return air pressure value is less than limit pressure, compressor is sent to air conditioner electric control device out of service
Instruction, so that the air conditioner electric control device controls the compressor of air conditioner to stop fortune based on compressor instruction out of service
OK.
Preferably, the temperature value of the multiple temperature sensors collection set in the monitoring predeterminable area, and according to institute
Also include after the step of stating the compressor return air pressure value in temperature value calculating compressor of air conditioner return line：
The compressor return air pressure value is preserved, and shows the compressor return air pressure value.
Preferably, the compressor return air pressure value calculated according to the temperature value in compressor of air conditioner return line
Step includes：
The saturated-steam temperature value of the predeterminable area is calculated according to the temperature value, and according to the saturated-steam temperature
Value calculates the saturated vapor pressure force value of evaporator；
After the return air temperature angle value in the compressor of air conditioner return line is got, according to the saturated-steam temperature
Value, the saturated vapor pressure force value and the return air temperature angle value calculate the pressure drop in the compressor of air conditioner return line；
The compressor return air pressure value is calculated according to the saturated vapor pressure force value and the pressure drop.
Preferably, it is described the predeterminable area is calculated according to the temperature value saturated-steam temperature value the step of include：
The temperature value that each temperature sensor is gathered in the predeterminable area is obtained respectively, to obtain multiple temperature values；
The average temperature value of the multiple temperature value is calculated, and determines that the average temperature value is the full of the predeterminable area
With vapor (steam) temperature value.
Preferably, the predeterminable area is：The saturated-steam temperature value probability of occurrence is maximum under each outdoor environment temperature
Region.
In addition, to achieve the above object, the present invention also provides a kind of low-voltage protection device of compressor of air conditioner, including：
Computing module, the temperature value of the multiple temperature sensors collection set for monitoring in predeterminable area, and according to
The temperature value calculates the compressor return air pressure value in compressor of air conditioner return line；
Sending module, for when the compressor return air pressure value is less than limit pressure, being sent to air conditioner electric control device
Compressor instruction out of service, so that the air conditioner electric control device controls the sky based on compressor instruction out of service
Adjust compressor out of service.
Preferably, described device also includes：
Display module, for preserving the compressor return air pressure value, and shows the compressor return air pressure value.
Preferably, the computing module includes：
First computing unit, the saturated-steam temperature value for calculating the predeterminable area according to the temperature value, and root
The saturated vapor pressure force value of evaporator is calculated according to the saturated-steam temperature value；
Second computing unit, for after the return air temperature angle value in the compressor of air conditioner return line is got, according to
The saturated-steam temperature value, the saturated vapor pressure force value and the return air temperature angle value calculate the compressor of air conditioner muffler
Pressure drop on road；
3rd computing unit, for calculating the compressor return air pressure according to the saturated vapor pressure force value and the pressure drop
Force value.
Preferably, first computing unit is additionally operable to：
The temperature value that each temperature sensor is gathered in the predeterminable area is obtained respectively, to obtain multiple temperature values；
The average temperature value of the multiple temperature value is calculated, and determines that the average temperature value is the full of the predeterminable area
With vapor (steam) temperature value.
Preferably, the predeterminable area is：The saturated-steam temperature value probability of occurrence is maximum under each outdoor environment temperature
Region.
The temperature value for multiple temperature sensors collection that the present invention has been set by monitoring in predeterminable area, and according to temperature
Value calculates the compressor return air pressure value in compressor of air conditioner return line, is less than limit pressure in compressor return air pressure value
When, compressor instruction out of service is sent to air conditioner electric control device, so that air conditioner electric control device is based on compressor finger out of service
Order control compressor of air conditioner is out of service.The multiple TEMPs set due to the present invention by constantly monitoring in predeterminable area
The temperature value of device collection, and the temperature value gathered according to the plurality of temperature sensor calculates the compressor return air of the air-conditioning system
Each instantaneous compressor return air pressure value on pipeline, therefore user can monitor the operation conditions of compressor of air conditioner in real time, and
Operation conditions based on the compressor of air conditioner makes corresponding adjustment to the compressor of air conditioner, so as to protect air-conditioning system to run.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the first embodiment of the low-voltage variation method of compressor of air conditioner of the present invention；
Fig. 2 is the schematic flow sheet of the second embodiment of the low-voltage variation method of compressor of air conditioner of the present invention；
Fig. 3 for compressor of air conditioner of the present invention low-voltage variation method 3rd embodiment according to temperature value calculating air-conditioning pressure
The refinement schematic flow sheet of compressor return air pressure value in contracting machine return line；
Fig. 4 for compressor of air conditioner of the present invention low-voltage variation method fourth embodiment according to temperature value calculating preset areas
The refinement schematic flow sheet of the saturated-steam temperature value in domain；
Fig. 5 is the high-level schematic functional block diagram of the first embodiment of the low-voltage protection device of compressor of air conditioner of the present invention；
Fig. 6 is the high-level schematic functional block diagram of the second embodiment of the low-voltage protection device of compressor of air conditioner of the present invention；
Fig. 7 for compressor of air conditioner of the present invention low-voltage protection device 3rd embodiment in computing module refinement function mould
Block 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.
Based on above mentioned problem, the present invention provides a kind of low-voltage variation method of compressor of air conditioner.
Reference picture 1, Fig. 1 is the schematic flow sheet of the first embodiment of the low-voltage variation method of compressor of air conditioner of the present invention.
In the present embodiment, the low-voltage variation method of the compressor of air conditioner includes：
The temperature value of the multiple temperature sensors collection set in step S10, monitoring predeterminable area, and according to temperature value
Calculate the compressor return air pressure value in compressor of air conditioner return line；
In the present embodiment, in compressor of air conditioner running, the multiple temperature set in predeterminable area are constantly monitored
The temperature value of sensor collection is spent, each instantaneous compressor return air of the compressor of air conditioner return line is calculated according to the temperature value
Pressure value P su.
It should be noted that at the research and development of products stage, engineering staff is firstly the need of determination A/C evaporator in each outdoor
The maximum region of saturated-steam temperature value probability of occurrence, the i.e. predeterminable area under environment temperature, and it is multiple in predeterminable area distribution
Temperature sensor, so that the product is during coming into operation, can obtain multiple temperature sensor collections in the predeterminable area
Temperature value, and the compressor return air pressure value in compressor of air conditioner return line is calculated according to the temperature value.
Step S20, when compressor return air pressure value is less than limit pressure, sends compressor to air conditioner electric control device and stops
The instruction of operation, so that air conditioner electric control device is out of service based on compressor instruction control compressor of air conditioner out of service.
After compressor return air pressure value on the compressor of air conditioner return line is calculated, the compressor return air pressure is judged
Whether force value is less than the limit pressure of the compressor of air conditioner return line preserved.If so, then being sent to air conditioner electric control device
Compressor instruction out of service, controls the compressor of air conditioner out of service by the air conditioner electric control device；If it is not, then this is air conditioner compressed
Machine is continued to run with, and continues to calculate each instantaneous compressor return air pressure value in the compressor of air conditioner return line, until judging
Go out the limit pressure that the compressor return air pressure value is less than the compressor of air conditioner return line.
The temperature value for multiple temperature sensors collection that the present embodiment has been set by monitoring in predeterminable area, and according to temperature
Angle value calculates the compressor return air pressure value in compressor of air conditioner return line, is less than limiting pressure in compressor return air pressure value
During value, compressor instruction out of service is sent to air conditioner electric control device, so that air conditioner electric control device is out of service based on compressor
Instruction control compressor of air conditioner is out of service.Because multiple temperature that the present invention has been set by constantly monitoring in predeterminable area are passed
The temperature value of sensor collection, and the temperature value gathered according to the plurality of temperature sensor calculates the compressor time of the air-conditioning system
Each instantaneous compressor return air pressure value on air pipe, therefore user can monitor the operation conditions of compressor of air conditioner in real time,
And the operation conditions based on the compressor of air conditioner makes corresponding adjustment to the compressor of air conditioner, so as to protect air-conditioning system to transport
OK.
Further, based on first embodiment, propose that the second of the low-voltage variation method of compressor of air conditioner of the present invention is implemented
Example, in the present embodiment, reference picture 2, after above-mentioned steps S10, the low-voltage variation method of the compressor of air conditioner also includes：
Step S30, preserves compressor return air pressure value, and show compressor return air pressure value.
After compressor return air pressure value on the compressor of air conditioner return line is calculated, by the compressor return air pressure
Value is stored in the memory of the air-conditioning, is either uploaded in Cloud Server the compressor return air pressure value or is pressed this
Contracting machine back pressure value is sent to the mobile terminal being connected with the air-conditioning system.And include the compressor return air pressure value in sky
In adjusting system, or by the compressor return air pressure value include in the APP for the mobile terminal being connected with the air-conditioning system, for
User checks.
The present embodiment shows compressor return air pressure value by preserving compressor return air pressure value.Because the present invention will
Each instantaneous compressor return air pressure value is recorded and shown on the compressor return air pipeline of the air-conditioning system, therefore user can
To monitor the operation conditions of compressor of air conditioner in real time, and the operation conditions based on the compressor of air conditioner is made to the compressor of air conditioner
Corresponding adjustment, so as to protect air-conditioning system to run.
Further, based on first embodiment, propose that the 3rd of the low-voltage variation method of compressor of air conditioner of the present invention implements
Example, in the present embodiment, reference picture 3, above-mentioned steps S10 includes：
Step S11, the saturated-steam temperature value of predeterminable area is calculated according to temperature value, and according to saturated-steam temperature value meter
Calculate the saturated vapor pressure force value of evaporator；
In the present embodiment, collecting temperature value is carried out due to distributed multiple temperature sensors on the predeterminable area, to calculate
Average temperature value on the predeterminable area, i.e. saturated-steam temperature value Tse.Based on saturated-steam temperature and saturated vapour pressure one by one
Corresponding functional relation, therefore calculate according to saturated-steam temperature value saturated vapor pressure the force value Pse, i.e. Pse=P of evaporator
(Tse).Wherein, the predeterminable area is：Under each outdoor environment temperature, for example, 35 °, 30 ° and 25 °, the saturated-steam temperature value
The maximum region of probability of occurrence, i.e., correspond to a saturated-steam temperature value probability of occurrence maximum under each outdoor environment temperature
Region, the overlay region in the maximum region of saturated-steam temperature value probability of occurrence under each outdoor environment temperature is defined as preset areas
Domain.
It should be noted that the predeterminable area needs what is just determined after being detected by engineering staff, the detection predeterminable area
Method include：
Engineering staff is using fluent softwares (CFD computational fluid dynamicses business software) sunykatuib analysis air-conditioning system each
When being run under outdoor environment temperature, the thermo parameters method of evaporator, Binding experiment finds out saturation evaporating temperature value probability of occurrence most
Big region, mean temperature is obtained in the maximum multiple temperature sensors of area distribution of the saturation evaporating temperature value probability of occurrence
Value, i.e. saturated-steam temperature value Tse, the mathematical modeling set up between temperature parameter and pressure parameter analyzes compressor of air conditioner return-air
Pressure drop on pipeline, i.e. △ Pe, and calculate compressor return air pressure, i.e. Psu=P (Tse)-△ Pe；Meanwhile, engineering staff utilizes
Pressure tool detects compressor return air pressure；Compressor return air pressure obtained by the calculating and pressure tool detection compressor are returned
Atmospheric pressure is compared, to obtain error amount, if the error amount is less than default error amount, without correcting obtained by the calculating
Compressor return air pressure, so that it is determined that the maximum region of currently detected saturation evaporating temperature value probability of occurrence is preset areas
Domain, if the error amount is more than default error amount, corrects the compressor return air pressure obtained by the calculating, that is, continues to detect that this is satisfied
The maximum region with evaporating temperature value probability of occurrence, until the compressor return air pressure obtained by calculating is detected with pressure tool and compressed
The error amount of machine back pressure is less than default error amount.
Step S12, after the return air temperature angle value in compressor of air conditioner return line is got, according to saturated-steam temperature
Value, saturated vapor pressure force value and return air temperature angle value calculate the pressure drop in compressor of air conditioner return line；
Step S13, compressor return air pressure value is calculated according to saturated vapor pressure force value and pressure drop.
During pressure drop on compressor of air conditioner return line is calculated, obtain and call the temperature parameter and pressure parameter set up
Between mathematical modeling, i.e., according to the drop formula of tube runs：
Wherein, the pressure drop in Δ P compressors of air conditioner return line, λ is coefficient, and ρ is refrigerant density, and g accelerates for gravity
Degree, l is the length of measurement compressor return air pressure spot to measurement saturated vapor pressure force, and v is specific volume parameter, and d is air-conditioning pressure
The diameter of contracting machine return line, K is coefficient, and m is refrigerant mass fluxes, and the m is in the compressor of air conditioner return line
What return air temperature angle value, saturated-steam temperature value and saturated vapor pressure force value were determined；Under specified outdoor environment temperature, then have：
ΔPrated=Kmrated 2
Wherein, Δ PratedFor rated voltage drop, K is coefficient, mratedFor specified refrigerant mass fluxes；By Δ P and the Δ
PratedTwo formulas, which compare, to be obtained：
ΔP/ΔPrated=(m/mrated)2
Wherein, the pressure drop in Δ P compressors of air conditioner return line, Δ PratedFor rated voltage drop, m is refrigerant mass flow
Amount, mratedFor specified refrigerant mass fluxes；And because
M=β mrated
Wherein, m is refrigerant mass fluxes, mratedFor specified refrigerant mass fluxes, β is coefficient, and the factor beta is not
Corresponding numerical values recited is different under same outdoor environment temperature, then obtains
Wherein, the pressure drop in Δ P compressors of air conditioner return line, β is coefficient, Δ PratedFor rated voltage drop, and the Δ
PratedProvided in compressor dispatches from the factory parameter, be fixed value, therefore, calculated according to the mathematical modeling under each outdoor environment temperature
The pressure drop of compressor return air pressure value and the pressure drop △ Pe between evaporating temperature saturation pressure force value are stated, then according to the saturated vapour pressure
Value Pse and pressure drop △ Pe, calculate compressor return air pressure value P su, i.e.,
Psu=P (Tse)-△ Pe
Wherein, Psu is compressor return air pressure value, and P (Tse)=Pse is saturated vapor pressure force value, and △ Pe are pressure drop.
The present embodiment is by calculating the saturated-steam temperature value of predeterminable area according to temperature value, and according to saturated-steam temperature
Value calculates the saturated vapor pressure force value of evaporator, after the return air temperature angle value in compressor of air conditioner return line is got, according to
Saturated-steam temperature value, saturated vapor pressure force value and return air temperature angle value calculate the pressure drop in compressor of air conditioner return line, according to
Saturated vapor pressure force value and pressure drop calculate compressor return air pressure value.Due to the pressure on the compressor return air pipeline of the air-conditioning system
Contracting machine back pressure value is constantly detected, therefore, as long as in a certain compressor return air pressure value that instantaneously detects less than pole
Pressure limiting force value, then send compressor instruction out of service so that the air conditioner electric control device is stopped based on compressor to air conditioner electric control device
The instruction control compressor of air conditioner only run is out of service, so as to protect air-conditioning system to run.
Further, based on 3rd embodiment, propose that the 4th of the low-voltage variation method of compressor of air conditioner of the present invention implements
Example, in the present embodiment, reference picture 4, above-mentioned steps S11 includes：
Step S111, obtains the temperature value that each temperature sensor is gathered in predeterminable area, to obtain multiple temperature respectively
Angle value；
Step S112, calculates the average temperature value of multiple temperature values, and determines the saturation that average temperature value is predeterminable area
Vapor (steam) temperature value.
In the present embodiment, when engineering staff determines occur the pre- of saturated-steam temperature value in compressor of air conditioner return line
If behind region, then arranging N (N=1,2,3 ... N) individual temperature sensor in this region, each temperature sensor is in current environment
At a temperature of can all collect a temperature value, obtain respectively each temperature sensor collection temperature value, then obtain N number of temperature
Value, respectively Tse1, Tse2, Tse3, Tse4 ... TseN.Calculate the average temperature value of N number of temperature value, i.e. Tse=(Tse1+
Tse2+ ... ..+TseN)/N, and determine the saturated-steam temperature value Tse that the average temperature value is the predeterminable area.
The present embodiment is multiple to obtain by obtaining the temperature value that the temperature sensor of each in predeterminable area is gathered respectively
Temperature value, calculates the average temperature value of multiple temperature values, and determines the saturated-steam temperature value that average temperature value is predeterminable area.
Because temperature sensor is sensitiveer, more accurately temperature value can be collected, therefore accurate saturation can be calculated and is steamed
Steam temperature angle value so that the compressor return air pressure value calculated is more accurate.
The present invention further provides a kind of low-voltage protection device of compressor of air conditioner.
Reference picture 5, Fig. 5 illustrates for the functional module of the first embodiment of the low-voltage protection device of compressor of air conditioner of the present invention
Figure.
In the present embodiment, the low-voltage protection device of the compressor of air conditioner includes：Computing module 10, sending module 20.
The computing module 10, the temperature value of the multiple temperature sensors collection set for monitoring in predeterminable area,
And the compressor return air pressure value in compressor of air conditioner return line is calculated according to temperature value；
In the present embodiment, the low-voltage protection device of the compressor of air conditioner has low-voltage variation effect；Or in air conditioner electric
Control and low-voltage variation module is merged in device, will be write with the program that low-voltage variation is acted in the low-voltage variation module.In air-conditioning pressure
In contracting machine running, computing module 10 constantly monitors the temperature of the multiple temperature sensors collection set in predeterminable area
Value, and each instantaneous compressor return air pressure value P su of the compressor of air conditioner return line is calculated according to the temperature value.
It should be noted that in low-voltage protection device development, engineering staff is firstly the need of determination A/C evaporator
The maximum region of saturated-steam temperature value probability of occurrence, the i.e. predeterminable area, and in predeterminable area under each outdoor environment temperature
Multiple temperature sensors are distributed, so that the product is during coming into operation, multiple TEMPs in the predeterminable area can be obtained
The temperature value of device collection, and the compressor return air pressure value in compressor of air conditioner return line is calculated according to the temperature value.
The sending module 20, for when compressor return air pressure value is less than limit pressure, being sent out to air conditioner electric control device
The instruction that compressor is out of service is sent, so that air conditioner electric control device is stopped based on compressor instruction control compressor of air conditioner out of service
Only run.
After computing module 10 calculates the compressor return air pressure value in the compressor of air conditioner return line, the pressure is judged
Whether contracting machine back pressure value is less than the limit pressure of the compressor of air conditioner return line preserved.If so, then sending mould
Block 20 sends compressor instruction out of service to air conditioner electric control device, controls the compressor of air conditioner to stop fortune by the air conditioner electric control device
OK；If it is not, then the compressor of air conditioner is continued to run with, the computing module 10 continues to calculate each in the compressor of air conditioner return line
Instantaneous compressor return air pressure value, until judging that the compressor return air pressure value is less than the compressor of air conditioner return line
Limit pressure.
The present embodiment monitors the temperature that the multiple temperature sensors set in predeterminable area are gathered by computing module 10
Value, and the compressor return air pressure value in compressor of air conditioner return line is calculated according to temperature value, in compressor return air pressure value
During less than limit pressure, sending module 20 sends compressor instruction out of service to air conditioner electric control device, for air conditioner electric control
Device is out of service based on compressor instruction control compressor of air conditioner out of service.Because the present invention is by constantly monitoring preset areas
The temperature value of the multiple temperature sensors collection set in domain, and the temperature value calculating gathered according to the plurality of temperature sensor
Go out each instantaneous compressor return air pressure value on the compressor return air pipeline of the air-conditioning system, therefore user can monitor in real time
The operation conditions of compressor of air conditioner, and the operation conditions based on the compressor of air conditioner makes corresponding tune to the compressor of air conditioner
It is whole, so as to protect air-conditioning system to run.
Further, based on first embodiment, propose that the second of the low-voltage protection device of compressor of air conditioner of the present invention is implemented
Example, in the present embodiment, reference picture 6, the low-voltage protection device of the compressor of air conditioner also includes：Display module 30.
The display module 30, for preserving compressor return air pressure value, and shows compressor return air pressure value.
After the compressor return air pressure value that computing module 10 calculates in the compressor of air conditioner return line, display module
30 are stored in the compressor return air pressure value in the memory of the air-conditioning, or the compressor return air pressure value is uploaded into cloud
In server, or the compressor return air pressure value is sent to the mobile terminal being connected with the air-conditioning system.The display module
30 and the compressor return air pressure value is shown within air-conditioning systems, or by the compressor return air pressure value include with the sky
In the APP of the mobile terminal of adjusting system connection, so that user checks.
The present embodiment shows compressor return air pressure value by preserving compressor return air pressure value.Because the present invention will
Each instantaneous compressor return air pressure value is recorded and shown on the compressor return air pipeline of the air-conditioning system, therefore user can
To monitor the operation conditions of compressor of air conditioner in real time, and the operation conditions based on the compressor of air conditioner is made to the compressor of air conditioner
Corresponding adjustment, so as to protect air-conditioning system to run.
Further, based on first embodiment, propose that the 3rd of the low-voltage protection device of compressor of air conditioner of the present invention implements
Example, in the present embodiment, reference picture 7, the computing module 10 include the first computing unit 11, the second computing unit the 12, the 3rd
Computing unit 13.
First computing unit 11, the saturated-steam temperature value for calculating predeterminable area according to temperature value, and according to
Saturated-steam temperature value calculates the saturated vapor pressure force value of evaporator；
In the present embodiment, carry out collecting temperature value due to distributed multiple temperature sensors on the predeterminable area, this
One computing unit 11, which gets the plurality of temperature sensor, to be come after collecting temperature value, calculates average temperature value on the predeterminable area,
That is saturated-steam temperature value Tse.First computing unit 11 is based on saturated-steam temperature and saturated vapour pressure is one-to-one
Functional relation, therefore calculate according to saturated-steam temperature value saturated vapor pressure the force value Pse, i.e. Pse=P (Tse) of evaporator.
Wherein, the predeterminable area is：Under each outdoor environment temperature, for example, 35 °, 30 ° and 25 °, the saturated-steam temperature value occurs general
The maximum region of rate, i.e., correspond to the maximum area of a saturated-steam temperature value probability of occurrence under each outdoor environment temperature
Domain, predeterminable area is defined as by the overlay region in the maximum region of saturated-steam temperature value probability of occurrence under each outdoor environment temperature.
It should be noted that the predeterminable area needs what is just determined after being detected by engineering staff, the detection predeterminable area
Method include：
Engineering staff is using fluent softwares (CFD computational fluid dynamicses business software) sunykatuib analysis air-conditioning system each
When being run under outdoor environment temperature, the thermo parameters method of evaporator, Binding experiment finds out saturation evaporating temperature value probability of occurrence most
Big region, mean temperature is obtained in the maximum multiple temperature sensors of area distribution of the saturation evaporating temperature value probability of occurrence
Value, i.e. saturated-steam temperature value Tse, the mathematical modeling set up between temperature parameter and pressure parameter analyzes compressor of air conditioner return-air
Pressure drop on pipeline, i.e. △ Pe, and calculate compressor return air pressure, i.e. Psu=P (Tse)-△ Pe；Meanwhile, engineering staff utilizes
Pressure tool detects compressor return air pressure；Compressor return air pressure obtained by the calculating and pressure tool detection compressor are returned
Atmospheric pressure is compared, to obtain error amount, if the error amount is less than default error amount, without correcting obtained by the calculating
Compressor return air pressure, so that it is determined that the maximum region of currently detected saturation evaporating temperature value probability of occurrence is preset areas
Domain, if the error amount is more than default error amount, corrects the compressor return air pressure obtained by the calculating, that is, continues to detect that this is satisfied
The maximum region with evaporating temperature value probability of occurrence, until the compressor return air pressure obtained by calculating is detected with pressure tool and compressed
The error amount of machine back pressure is less than default error amount.
Second computing unit 12, for after the return air temperature angle value in compressor of air conditioner return line is got, root
The pressure drop in compressor of air conditioner return line is calculated according to saturated-steam temperature value, saturated vapor pressure force value and return air temperature angle value；
3rd computing unit 13, for calculating compressor return air pressure value according to saturated vapor pressure force value and pressure drop.
When the second computing unit 12 calculates the pressure drop in compressor of air conditioner return line, the temperature called and set up is obtained
Mathematical modeling between parameter and pressure parameter, i.e., according to the drop formula of tube runs：
Wherein, the pressure drop in Δ P compressors of air conditioner return line, λ is coefficient, and ρ is refrigerant density, and g accelerates for gravity
Degree, l is the length of measurement compressor return air pressure spot to measurement saturated vapor pressure force, and v is specific volume parameter, and d is air-conditioning pressure
The diameter of contracting machine return line, K is coefficient, and m is refrigerant mass fluxes, and the m is in the compressor of air conditioner return line
What return air temperature angle value, saturated-steam temperature value and saturated vapor pressure force value were determined；Under specified outdoor environment temperature, then have：
ΔPrated=Kmrated 2
Wherein, Δ PratedFor rated voltage drop, K is coefficient, mratedFor specified refrigerant mass fluxes；By Δ P and the Δ
PratedTwo formulas, which compare, to be obtained：
ΔP/ΔPrated=(m/mrated)2
Wherein, the pressure drop in Δ P compressors of air conditioner return line, Δ PratedFor rated voltage drop, m is refrigerant mass flow
Amount, mratedFor specified refrigerant mass fluxes；And because
M=β mrated
Wherein, m is refrigerant mass fluxes, mratedFor specified refrigerant mass fluxes, β is coefficient, and the factor beta is not
Corresponding numerical values recited is different under same outdoor environment temperature, then obtains
Wherein, the pressure drop in Δ P compressors of air conditioner return line, β is coefficient, Δ PratedFor rated voltage drop, and the Δ
PratedProvided in compressor dispatches from the factory parameter, be fixed value, therefore, calculated according to the mathematical modeling under each outdoor environment temperature
The pressure drop of compressor return air pressure value and the pressure drop △ Pe between evaporating temperature saturation pressure force value are stated, then the basis of the 3rd computing unit 13
The saturated vapor pressure force value Pse and pressure drop △ Pe, calculate compressor return air pressure value P su, i.e.,
Psu=P (Tse)-△ Pe
Wherein, Psu is compressor return air pressure value, and P (Tse)=Pse is saturated vapor pressure force value, and △ Pe are pressure drop.
First computing unit 11, is additionally operable to obtain the temperature of the temperature sensor of each in predeterminable area collection respectively
Value, to obtain multiple temperature values；
First computing unit 11, is additionally operable to calculate the average temperature value of multiple temperature values, and determines average temperature value
For the saturated-steam temperature value of predeterminable area.
After engineering staff determines to occur in compressor of air conditioner return line the predeterminable area of saturated-steam temperature value, then exist
N (N=1,2,3 ... N) individual temperature sensor is arranged in this region, and each temperature sensor can be gathered under current environmental temperature
To a temperature value, the first computing unit 11 obtains the temperature value of each temperature sensor collection, then obtains N number of temperature respectively
Value, respectively Tse1, Tse2, Tse3, Tse4 ... TseN, and calculate the average temperature value of N number of temperature value, i.e. Tse=(Tse1
+ Tse2+ ... ..+TseN)/N, determine the saturated-steam temperature value Tse that the average temperature value is the predeterminable area.
The present embodiment is by calculating the saturated-steam temperature value of predeterminable area according to temperature value, and according to saturated-steam temperature
Value calculates the saturated vapor pressure force value of evaporator, after the return air temperature angle value in compressor of air conditioner return line is got, according to
Saturated-steam temperature value, saturated vapor pressure force value and return air temperature angle value calculate the pressure drop in compressor of air conditioner return line, according to
Saturated vapor pressure force value and pressure drop calculate compressor return air pressure value.Due to the pressure on the compressor return air pipeline of the air-conditioning system
Contracting machine back pressure value is constantly detected, therefore, as long as in a certain compressor return air pressure value that instantaneously detects less than pole
Pressure limiting force value, then send compressor instruction out of service so that the air conditioner electric control device is stopped based on compressor to air conditioner electric control device
The instruction control compressor of air conditioner only run is out of service, so as to protect air-conditioning system to run.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of low-voltage variation method of compressor of air conditioner, it is characterised in that the described method comprises the following steps：
The temperature value of the multiple temperature sensors collection set in monitoring predeterminable area, and air-conditioning is calculated according to the temperature value
Compressor return air pressure value on compressor return air pipeline；
When the compressor return air pressure value is less than limit pressure, compressor finger out of service is sent to air conditioner electric control device
Order, so that the air conditioner electric control device controls the compressor of air conditioner out of service based on compressor instruction out of service；
Wherein, it is described according to the temperature value calculate compressor of air conditioner return line on compressor return air pressure value the step of wrap
Include：
The saturated-steam temperature value of the predeterminable area is calculated according to the temperature value, and according to the saturated-steam temperature value meter
Calculate the saturated vapor pressure force value of evaporator；
After the return air temperature angle value in the compressor of air conditioner return line is got, according to the saturated-steam temperature value, institute
State the pressure drop in saturated vapor pressure force value and the return air temperature angle value calculating compressor of air conditioner return line；
The compressor return air pressure value is calculated according to the saturated vapor pressure force value and the pressure drop.
2. the low-voltage variation method of compressor of air conditioner as claimed in claim 1, it is characterised in that in the monitoring predeterminable area
The temperature value of the multiple temperature sensors collection set, and calculated according to the temperature value in compressor of air conditioner return line
Also include after the step of compressor return air pressure value：
The compressor return air pressure value is preserved, and shows the compressor return air pressure value.
3. the low-voltage variation method of compressor of air conditioner as claimed in claim 1, it is characterised in that described according to the temperature value
The step of saturated-steam temperature value for calculating the predeterminable area, includes：
The temperature value that each temperature sensor is gathered in the predeterminable area is obtained respectively, to obtain multiple temperature values；
The average temperature value of the multiple temperature value is calculated, and determines that the saturation that the average temperature value is the predeterminable area is steamed
Steam temperature angle value.
4. the low-voltage variation method of the compressor of air conditioner as described in claim any one of 1-3, it is characterised in that the preset areas
Domain is：The maximum region of the saturated-steam temperature value probability of occurrence under each outdoor environment temperature.
5. a kind of low-voltage protection device of compressor of air conditioner, it is characterised in that described device includes：
Computing module, the temperature value of the multiple temperature sensors collection set for monitoring in predeterminable area, and according to described
Temperature value calculates the compressor return air pressure value in compressor of air conditioner return line；
Sending module, for when the compressor return air pressure value is less than limit pressure, sending and compressing to air conditioner electric control device
Machine instruction out of service, so that the air conditioner electric control device controls the air-conditioning pressure based on compressor instruction out of service
Contracting machine is out of service；
Wherein, the computing module includes：
First computing unit, the saturated-steam temperature value for calculating the predeterminable area according to the temperature value, and according to institute
State the saturated vapor pressure force value that saturated-steam temperature value calculates evaporator；
Second computing unit, for after the return air temperature angle value in the compressor of air conditioner return line is got, according to described
Saturated-steam temperature value, the saturated vapor pressure force value and the return air temperature angle value are calculated in the compressor of air conditioner return line
Pressure drop；
3rd computing unit, for calculating the compressor return air pressure according to the saturated vapor pressure force value and the pressure drop
Value.
6. the low-voltage protection device of compressor of air conditioner as claimed in claim 5, it is characterised in that described device also includes：
Display module, for preserving the compressor return air pressure value, and shows the compressor return air pressure value.
7. the low-voltage protection device of compressor of air conditioner as claimed in claim 5, it is characterised in that first computing unit is also
For：
The temperature value that each temperature sensor is gathered in the predeterminable area is obtained respectively, to obtain multiple temperature values；
The average temperature value of the multiple temperature value is calculated, and determines that the saturation that the average temperature value is the predeterminable area is steamed
Steam temperature angle value.
8. the low-voltage protection device of the compressor of air conditioner as described in claim any one of 5-7, it is characterised in that the preset areas
Domain is：The maximum region of the saturated-steam temperature value probability of occurrence under each outdoor environment temperature.
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| CN107053997A (en) * | 2016-12-22 | 2017-08-18 | 重庆长安汽车股份有限公司 | Automobile air-conditioning evaporator defroster and method |
| CN110207332A (en) * | 2019-06-11 | 2019-09-06 | 珠海格力电器股份有限公司 | The pressure detection method and air conditioner of air conditioner |
| CN112146233B (en) * | 2019-06-26 | 2021-11-23 | 广东美的制冷设备有限公司 | Air conditioner, air conditioner control method and device and readable storage medium |
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