CN106766444B - The liquid impact prevention control method and control device and air-conditioning system of air-conditioning system - Google Patents
The liquid impact prevention control method and control device and air-conditioning system of air-conditioning system Download PDFInfo
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- CN106766444B CN106766444B CN201611034105.4A CN201611034105A CN106766444B CN 106766444 B CN106766444 B CN 106766444B CN 201611034105 A CN201611034105 A CN 201611034105A CN 106766444 B CN106766444 B CN 106766444B
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- conditioning system
- preset time
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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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- 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
- F25B2600/00—Control issues
- F25B2600/01—Timing
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
-
- 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
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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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
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
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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
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses the liquid impact prevention control methods and control device and air-conditioning system of a kind of air-conditioning system, air-conditioning system includes compressor, condenser and evaporator, method includes the following steps: the exhaust port temperatures of detection compressor, and detect the middle portion temperature of condenser and the middle portion temperature of evaporator；When air-conditioning system refrigerating operaton, the discharge superheat of compressor is calculated according to the middle portion temperature of exhaust port temperatures and condenser；When air-conditioning system heating operation, the discharge superheat of compressor is calculated according to the middle portion temperature of exhaust port temperatures and evaporator；Discharge superheat is monitored in air-conditioning system operational process；If discharge superheat is less than the first preset value and continues the first preset time; it then controls timer and starts timing; and the outdoor unit that air-conditioning system is controlled when the timing time of timer reaches the second preset time is shut down to prevent compressor from liquid hammer occurs; it can guarantee that the refrigerant for returning to compressor is pure gaseous state; it avoids that liquid hammer occurs, improves detection accuracy.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to the liquid impact prevention control method of a kind of air-conditioning system, a kind of air-conditioning
The liquid impact prevention control device of system and a kind of air-conditioning system.
Background technique
Within air-conditioning systems, refrigerant or lubricating oil are excessive, the degree of regulation (open degree) of expansion valve (or regulating valve) is excessive,
The factors such as the thermic load of evaporator is unstable all may cause liquid refrigerant and enter compresser cylinder, make compressor that liquid occur
It hits, long-time, heavier liquid hammer can make the component undergoes deformations such as the valve block of compressor, rupture, or even cause the permanent of compressor
Property damage.
It in the related art, is the return-air degree of superheat by real-time monitoring air-conditioning system mostly, to guarantee returning for compressor
The refrigerant of port sucking is pure gaseous state, to prevent liquid refrigerant from entering compressor and avoid compressor that liquid hammer occurs.But
It is that the return-air degree of superheat numerical value of air-conditioning system is typically small, is not easy to carry out Data Detection and control, leads to compressor liquid impact prevention
The precision of control is lower, and reliability is poor.
Therefore, compressor liquid impact prevention control technology needs in the related technology improve.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose that a kind of liquid impact prevention control method of air-conditioning system, this method pass through the row in real-time monitoring air-conditioning system
The gas degree of superheat come prevent compressor occur liquid hammer, substantially increase air-conditioning system operation safety and reliability.
It is another object of the present invention to the liquid impact prevention control devices for proposing a kind of air-conditioning system.Of the invention another
Purpose is to propose a kind of air-conditioning system.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of liquid impact prevention control method of air-conditioning system,
The air-conditioning system includes compressor, condenser and evaporator, be the described method comprises the following steps: detecting the row of the compressor
Port temperature, and detect the middle portion temperature of the condenser and the middle portion temperature of the evaporator；When the air-conditioning system is freezed
When operation, the discharge superheat of the compressor is calculated according to the middle portion temperature of the exhaust port temperatures and the condenser；When
When the air-conditioning system heating operation, the compressor is calculated according to the middle portion temperature of the exhaust port temperatures and the evaporator
Discharge superheat；The discharge superheat is monitored in the air-conditioning system operational process；If described be vented
Temperature is less than the first preset value and continues the first preset time, then controls timer and start timing, and in the meter of the timer
When the time control the outdoor unit of the air-conditioning system when reaching the second preset time and shut down to prevent the compressor from liquid hammer occurs.
The liquid impact prevention control method of the air-conditioning system proposed according to embodiments of the present invention, by the exhaust outlet for detecting compressor
Temperature, and the middle portion temperature of condenser and the middle portion temperature of evaporator are detected, when air-conditioning system refrigerating operaton, according to exhaust outlet
The middle portion temperature of temperature and condenser calculates the discharge superheat of compressor, and when air-conditioning system heating operation, according to exhaust
The middle portion temperature of mouth temperature and evaporator calculates the discharge superheat of compressor, to discharge superheat in air-conditioning system operational process
Degree is monitored, if discharge superheat is less than the first preset value and continues the first preset time, is controlled timer and is started to count
When, and the outdoor unit shutdown of air-conditioning system is controlled when the timing time of timer reaches the second preset time to prevent compressor
Liquid hammer occurs.It follows that the liquid impact prevention control method of the air-conditioning system of the embodiment of the present invention passes through real-time monitoring compressor
Discharge superheat thereby may be ensured that the refrigerant for returning to compressor return air mouth is pure gaseous state, prevent to carry out liquid impact prevention protection
Liquid refrigerant enters compressor, avoids compressor that liquid hammer occurs.Also, it since discharge superheat numerical value is larger, is convenient for
Data Detection and control improve the precision of liquid impact prevention control, improve the safety and reliability of air-conditioning system operation.
According to one embodiment of present invention, during the timer carries out timing, if the discharge superheat
Degree is more than or equal to first preset value and continues third preset time, then is zeroed out to the timer, and continue to judge
Whether the discharge superheat meets the condition that timer starts timing.
According to one embodiment of present invention, after controlling the outdoor unit and shutting down, also judge in the 4th preset time
Whether the number that the air-conditioning system carries out liquid impact prevention protection is more than default time, wherein if institute in the 4th preset time
Stating air-conditioning system and carrying out the number of liquid impact prevention protection is more than default time, then controls the outdoor unit in the case where power-off
Restore booting；If the number that the air-conditioning system carries out liquid impact prevention protection in the 4th preset time is less than default time,
Then the timer is zeroed out, and controls the outdoor unit restarting after the 5th preset time.
A specific embodiment according to the present invention, first preset time can be 20 minutes, it is described second it is default when
Between can be 30 minutes, third preset time can be 5 minutes, the 4th preset time can be 120 minutes, it is described 5th it is default when
Between can be 6 minutes.
In order to achieve the above objectives, a kind of liquid impact prevention for air-conditioning system that another aspect of the present invention embodiment proposes controls dress
It sets, comprising: the first temperature sensor of the exhaust outlet of the compressor is set, and first temperature sensor is for detecting institute
State the exhaust port temperatures of compressor；Second temperature sensor in the middle part of the evaporator, the second temperature sensor are set
For detecting the middle portion temperature of the evaporator；Third temperature sensor in the middle part of the condenser, the third temperature are set
Degree sensor is used to detect the middle portion temperature of the condenser；Computing module, for the root in the air-conditioning system refrigerating operaton
The discharge superheat of the compressor is calculated according to the middle portion temperature of the exhaust port temperatures and the condenser, and in the sky
The exhaust of the compressor is calculated when adjusting system heating operation according to the middle portion temperature of the exhaust port temperatures and the evaporator
The degree of superheat；Monitoring modular 50, for being monitored in the air-conditioning system operational process to the discharge superheat；Control mould
Block starts timing for controlling timer when the discharge superheat is less than the first preset value and continues the first preset time,
And the outdoor unit that the air-conditioning system is controlled when the timing time of the timer reaches the second preset time is shut down to prevent
Liquid hammer occurs for the compressor.
The liquid impact prevention control device of the air-conditioning system proposed according to embodiments of the present invention is detected by the first temperature sensor
The exhaust port temperatures of compressor, second temperature sensor detect the middle portion temperature of evaporator, the detection condensation of third temperature sensor
The middle portion temperature of device, computing module are calculated in air-conditioning system refrigerating operaton according to the middle portion temperature of exhaust port temperatures and condenser
The discharge superheat of compressor, and calculated in air-conditioning system heating operation according to the middle portion temperature of exhaust port temperatures and evaporator
The discharge superheat of compressor, also, monitoring modular 50 is monitored discharge superheat in air-conditioning system operational process, control
Molding block controls timer when discharge superheat is less than the first preset value and continues the first preset time and starts timing, and is counting
When device timing time when reaching the second preset time the outdoor unit of control air-conditioning system shut down to prevent compressor from liquid hammer occurs.
As a result, the liquid impact prevention control device of the air-conditioning system of the embodiment of the present invention by the discharge superheat of real-time monitoring compressor come into
The protection of row liquid impact prevention thereby may be ensured that the refrigerant for returning to compressor return air mouth is pure gaseous state, prevent liquid refrigerant from entering
Compressor avoids compressor that liquid hammer occurs.Also, since discharge superheat numerical value is larger, it is convenient for Data Detection and control,
The precision for improving liquid impact prevention control improves the safety and reliability of air-conditioning system operation.
According to one embodiment of present invention, during the timer carries out timing, if the discharge superheat
Degree is more than or equal to first preset value and continues third preset time, and the control module then carries out the timer clear
Zero, and continue to judge whether the discharge superheat meets the condition that timer starts timing.
According to one embodiment of present invention, after controlling the outdoor unit and shutting down, the control module also judges the
Whether the number that the air-conditioning system carries out liquid impact prevention protection in four preset times is more than default time, wherein if the described 4th
It is more than default time that the air-conditioning system, which carries out the number of liquid impact prevention protection, in preset time, and the control module then controls the room
Irrecoverable booting in the case where non-power-off of outer machine；If the air-conditioning system carries out liquid impact prevention in the 4th preset time
The number of protection is less than default time, and the control module is then zeroed out the timer, and after the 5th preset time
Control the outdoor unit restarting.
A specific embodiment according to the present invention, first preset time can be 20 minutes, it is described second it is default when
Between can be 30 minutes, third preset time can be 5 minutes, the 4th preset time can be 120 minutes, it is described 5th it is default when
Between can be 6 minutes.
In order to achieve the above objectives, a kind of air-conditioning system that another aspect of the invention embodiment proposes, including the embodiment
Air-conditioning system liquid impact prevention control device.
The air-conditioning system proposed according to embodiments of the present invention, by the liquid impact prevention control device of above-mentioned air-conditioning system, in real time
The discharge superheat of compressor is monitored to carry out liquid impact prevention protection, thereby may be ensured that the refrigerant for returning to compressor return air mouth is
Pure gaseous state, prevents liquid refrigerant from entering compressor, avoids compressor that liquid hammer occurs.Also, due to discharge superheat numerical value compared with
Greatly, Data Detection and control are convenient for, improve liquid impact prevention control precision, improve air-conditioning system operation safety and
Reliability.
Detailed description of the invention
Fig. 1 is the flow chart of the liquid impact prevention control method of air-conditioning system according to an embodiment of the present invention；
Fig. 2 is the curve synoptic diagram of the pressure-enthalpy chart of air-conditioning system according to an embodiment of the invention；
Fig. 3 is the flow chart of the liquid impact prevention control method of air-conditioning system accord to a specific embodiment of that present invention；
Fig. 4 is the block diagram of the liquid impact prevention control device of air-conditioning system according to an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of air-conditioning system according to an embodiment of the invention；And
Fig. 6 is the block diagram of air-conditioning system according to an embodiment of the present invention.
Appended drawing reference:
First temperature sensor 10, second temperature sensor 20, third temperature sensor 30, computing module 40, monitoring mould
Block 50 and control module 60；
Compressor 100, evaporator 200, condenser 300 and timer 400；
The liquid impact prevention control device 600 of air-conditioning system 500 and air-conditioning system.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition air-conditioning system liquid impact prevention control method, air-conditioning system
Liquid impact prevention control device and air-conditioning system.
Fig. 1 is the flow chart of the liquid impact prevention control method of air-conditioning system according to an embodiment of the present invention.Air-conditioning system includes
Compressor, condenser and evaporator, the liquid impact prevention control method of the air-conditioning system the following steps are included:
S10: detecting the exhaust port temperatures Tc of compressor, and detects the middle portion temperature T1 of condenser and the middle part temperature of evaporator
Spend T2.
S20: it when air-conditioning system refrigerating operaton, is calculated and is compressed according to the middle portion temperature T1 of exhaust port temperatures Tc and condenser
The discharge superheat DSH of machine.
S30: it when air-conditioning system heating operation, is calculated and is compressed according to the middle portion temperature T2 of exhaust port temperatures Tc and evaporator
The discharge superheat DSH of machine.
Specifically, pressure-enthalpy chart shown in Fig. 2 can be obtained according to the job analysis of air-conditioning system, wherein ordinate is
The logarithm LogP of the absolute pressure of air-conditioning system, abscissa are air-conditioning system than enthalpy h.As shown in Fig. 2, air-conditioning system exists
1-2 sections are in overheat exothermic phase, at this point, the gaseous refrigerant of the exhaust outlet discharge high temperature and pressure of compressor；Air-conditioning system exists
2-4 sections are in level pressure exothermic phase；Air-conditioning system is in level pressure endothermic phase at 5-6 sections；Air-conditioning system is at 6-7 sections in overheat
Endothermic phase, at this point, the gas returning port of compressor sucks refrigerant.As shown in Fig. 2, the discharge superheat DSH of air-conditioning system and return
Gas degree of superheat SSH is corresponding, and the numerical value of discharge superheat DSH is greater than the numerical value of return-air degree of superheat SSH, therefore, if exhaust
Degree of superheat DSH is in preset range, then can guarantee that the refrigerant of compressor return air mouth sucking is pure gaseous state.
In the operational process of air-conditioning system, the exhaust port temperatures Tc of real-time detection compressor, and detect in condenser
The middle portion temperature T2 of portion temperature T1 and evaporator, when air-conditioning system refrigerating operaton, the middle portion temperature T1 of condenser is equivalent to sky
The middle portion temperature T1 of the on high-tension side saturation temperature of adjusting system, i.e. condenser can be used as exhaust saturation temperature, at this point, the row of compressor
Gas degree of superheat DSH can approximate representation be compressor exhaust port temperatures Tc and condenser middle portion temperature T1 difference (Tc-T1)；
When air-conditioning system heating operation, the middle portion temperature T2 of evaporator is equivalent to the on high-tension side saturation temperature of air-conditioning system, that is, evaporates
The middle portion temperature T2 of device can be used as exhaust saturation temperature, at this point, the discharge superheat DSH of compressor can approximate representation be compressor
Exhaust port temperatures Tc and evaporator middle portion temperature T2 difference (Tc-T2), and then using real-time discharge superheat DSH
Carry out liquid impact prevention control.
S40: discharge superheat DSH is monitored in air-conditioning system operational process.
S50: if discharge superheat DSH is less than the first preset value M1 and continues the first preset time t 1, timing is controlled
Device starts timing, and the outdoor unit shutdown of air-conditioning system is controlled when the timing time t of timer reaches the second preset time t 2
To prevent compressor from liquid hammer occurs.
A specific embodiment according to the present invention, the first preset time t 1 can be 20 minutes, and the second preset time t 2 can
It is 30 minutes, the first preset value M1 can be A DEG C.
Specifically, the discharge superheat DSH of compressor is obtained in real time, and to being vented in air-conditioning system operational process
Temperature DSH is monitored, to judge whether the discharge superheat DSH of air-conditioning system is more than or equal to the first preset value M1, if row
Gas degree of superheat DSH is more than or equal to the first preset value M1 (such as A DEG C), then illustrates that the return-air degree of superheat SSH of air-conditioning system is sufficiently large,
The outdoor unit for controlling air-conditioning system keeps operating normally, at this point, the refrigerant that the gas returning port of compressor sucks is pure gaseous state；If
Discharge superheat DSH less than the first preset value M1, then further judge the duration whether reach the first preset time t 1 (such as
20 minutes), if the duration reaches the first preset time t 1, controls timer and start timing.
Further, judge whether the timing time t of timer reaches the second preset time t 2 (such as 30 minutes), work as meter
When device timing time t reach the second preset time t 2, in other words, discharge superheat DSH less than the first preset value M1 it is lasting when
Between when reaching the second preset time t 2, the return-air degree of superheat SSH of air-conditioning system is relatively low, and the outdoor unit for controlling air-conditioning system at this time stops
Machine, to prevent the gas returning port of compressor from sucking liquid refrigerant, to avoid compressor that liquid hammer occurs.
According to one embodiment of present invention, during timer carries out timing, if discharge superheat DSH is greater than
Equal to the first preset value M1 and continue third preset time t 3, then timer is zeroed out, and continue to judge discharge superheat
Whether DSH meets the condition that timer starts timing.
A specific embodiment according to the present invention, third preset time t 3 can be 5 minutes.
Specifically, during timer carries out timing, real-time monitoring discharge superheat DSH, if discharge superheat
Spend DSH be more than or equal to the first preset value M1 (such as A degrees Celsius), then further judge the duration whether reach third preset when
Between t3 (such as 5 minutes), if discharge superheat DSH be more than or equal to the first preset value M1 (such as A degrees Celsius) and continue third
Preset time t 3, then be zeroed out timer, and rejudges discharge superheat DSH and whether meet timer and start timing
Condition.
According to one embodiment of present invention, after control outdoor unit is shut down, also judge empty in the 4th preset time t 4
Whether the times N that adjusting system carries out liquid impact prevention protection is more than default time (such as 1 time), wherein if in the 4th preset time t 4
The times N that air-conditioning system carries out liquid impact prevention protection is more than default time (such as 1 time), then controls outdoor unit in the case where non-power-off
Irrecoverable booting；If the times N that air-conditioning system carries out liquid impact prevention protection in the 4th preset time t 4 is less than default (example
Such as 1 time), then timer is zeroed out, and outdoor unit restarting is controlled after the 5th preset time t 5.
A specific embodiment according to the present invention, the 4th preset time t 4 can be 120 minutes, and the 5th preset time t 5 can
It is 6 minutes.
Specifically, number (the i.e. control outdoor unit shutdown of liquid impact prevention protection can be carried out to air-conditioning system by counter
Number) N counted, if the interior air-conditioning system of the 4th preset time t 4 (such as 120 minutes) carries out time of liquid impact prevention protection
Number N is more than default time (such as 1 time), and it is relatively low to illustrate that the return-air degree of superheat SSH of air-conditioning system continues, then controls outdoor unit non-disconnected
Irrecoverable booting in the case where electricity needs first to carry out power down process to outdoor unit, outdoor unit can just be made to restore booting in other words.
If the times N that the interior air-conditioning system of the 4th preset time t 4 (such as 120 minutes) carries out liquid impact prevention protection is less than default (example
Such as 1 time), then timer is zeroed out, and automatically control outdoor machine afterwards in the 5th preset time t 5 (such as 6 minutes) and open again
It is dynamic, and rejudge whether discharge superheat DSH meets the condition that timer starts timing.
As described above, as shown in figure 3, the liquid impact prevention control method of the air conditioner of the embodiment of the present invention specifically may include following
Step:
S101: liquid impact prevention protection control is opened.
S102: the discharge superheat DSH of compressor is obtained in real time, and to discharge superheat in air-conditioning system operational process
DSH is monitored.
S103: judge discharge superheat DSH whether less than the first preset value M1.
If so, thening follow the steps S104；If not, thening follow the steps S105.
S104: judge whether the duration reaches the first preset time t 1.
If so, thening follow the steps S106；If not, thening follow the steps S103.
S105: the outdoor unit for controlling air-conditioning system keeps operating normally.
S106: control timer starts timing.
S107: judge whether discharge superheat DSH is more than or equal to the first preset value M1.
If so, thening follow the steps S108；If not, thening follow the steps S110.
S108: judge whether the duration reaches third preset time t 3.
If so, thening follow the steps S109；If not, thening follow the steps S107.
S109: control timer is zeroed out, and executes step S102.
S110: judge whether the timing time t of timer reaches the second preset time t 2.
If so, thening follow the steps S111；If not, thening follow the steps S107.
S111: the outdoor unit for controlling air-conditioning system is shut down.
S112: whether the times N for judging that air-conditioning system carries out liquid impact prevention protection in the 4th preset time t 4 is more than default time
(such as 1 time).
If so, thening follow the steps S113；If not, thening follow the steps S114.
S113: control outdoor unit irrecoverable booting in the case where non-power-off.
S114: control timer is zeroed out, and outdoor unit restarting is controlled after the 5th preset time t 5, and execute
Step S102.
S115: liquid impact prevention control terminates.
To sum up, the liquid impact prevention control method of the air-conditioning system proposed according to embodiments of the present invention passes through detection compressor
Exhaust port temperatures, and the middle portion temperature of condenser and the middle portion temperature of evaporator are detected, when air-conditioning system refrigerating operaton, according to
The middle portion temperature of exhaust port temperatures and condenser calculates the discharge superheat of compressor, and when air-conditioning system heating operation, root
The discharge superheat that compressor is calculated according to the middle portion temperature of exhaust port temperatures and evaporator, to row in air-conditioning system operational process
The gas degree of superheat is monitored, if discharge superheat is less than the first preset value and continues the first preset time, controls timer
Start timing, and controls the outdoor unit shutdown of air-conditioning system when the timing time of timer reaches the second preset time to prevent
Liquid hammer occurs for compressor.It follows that the liquid impact prevention control method of the air-conditioning system of the embodiment of the present invention passes through real-time monitoring pressure
The discharge superheat of contracting machine thereby may be ensured that the refrigerant for returning to compressor return air mouth is pure gas to carry out liquid impact prevention protection
State prevents liquid refrigerant from entering compressor, avoids compressor that liquid hammer occurs.Also, since discharge superheat numerical value is larger, just
In carrying out Data Detection and control, the precision of liquid impact prevention control is improved, improves the safety of air-conditioning system operation and reliable
Property.
Fig. 4 is the block diagram of the liquid impact prevention control device of air-conditioning system according to an embodiment of the present invention.Such as Fig. 4 institute
Show, which includes: the first temperature sensor 10, second temperature sensor 20, third temperature sensor 30, meter
Calculate module 40, monitoring modular 50 and control module 60.
Wherein, as shown in figure 5, the exhaust outlet of compressor 100, the first temperature sensor is arranged in the first temperature sensor 10
10 for detecting the exhaust port temperatures Tc of compressor 100；The setting of second temperature sensor 20 is in 200 middle part of evaporator, the second temperature
Degree sensor 20 is used to detect the middle portion temperature T1 of evaporator 200；Third temperature sensor 30 is arranged at 300 middle part of condenser,
Third temperature sensor 30 is used to detect the middle portion temperature T2 of condenser 300；Computing module 40 is used to freeze in air-conditioning system and transport
The discharge superheat DSH of compressor 100 is calculated when row according to the middle portion temperature T2 of exhaust port temperatures Tc and condenser 300, and
The row of compressor 100 is calculated according to the middle portion temperature T1 of exhaust port temperatures Tc and evaporator 200 in air-conditioning system heating operation
Gas degree of superheat DSH；Monitoring modular 50 is for being monitored discharge superheat DSH in air-conditioning system operational process；Control mould
Block 60 is used to control timer 400 when discharge superheat DSH is less than the first preset value M1 and continues the first preset time t 1 and open
Beginning timing, and when the timing time t of timer 400 reaches the second preset time t 2 control air-conditioning system outdoor unit shut down with
Prevent compressor from liquid hammer occurs.
A specific embodiment according to the present invention, the first preset time t 1 can be 20 minutes, and the second preset time t 2 can
It is 30 minutes, the first preset value M1 can be A DEG C.
Specifically, in the operational process of air-conditioning system, the row of 10 real-time detection compressor 100 of the first temperature sensor
Port temperature Tc, the middle portion temperature T1 of 20 real-time detection condenser 300 of second temperature sensor, third temperature sensor 30 are real-time
The middle portion temperature T2 of evaporator 200 is detected, when air-conditioning system refrigerating operaton, the middle portion temperature T1 of condenser 300 is equivalent to sky
The middle portion temperature T1 of the on high-tension side saturation temperature of adjusting system, i.e. condenser 300 can be used as exhaust saturation temperature, at this point, compressor
100 discharge superheat DSH can approximate representation be compressor 100 exhaust port temperatures Tc and condenser 300 middle portion temperature T1
Difference (Tc-T1)；When air-conditioning system heating operation, the middle portion temperature T2 of evaporator 200 is equivalent to air-conditioning system high-pressure side
Saturation temperature, i.e. the middle portion temperature T2 of evaporator 200 can be used as exhaust saturation temperature, at this point, the discharge superheat of compressor 100
Spend DSH can approximate representation be compressor 100 exhaust port temperatures Tc and evaporator 200 middle portion temperature T2 difference (Tc-T2),
And then liquid impact prevention control is carried out using real-time discharge superheat DSH.
In this way, when air-conditioning system refrigerating operaton, exhaust port temperatures Tc and condensation of the computing module 40 according to compressor 100
The middle portion temperature T1 of device 300 calculates the discharge superheat DSH of compressor 100；When air-conditioning system heating operation, computing module 40
The discharge superheat of compressor 100 is calculated according to the middle portion temperature T2 of the exhaust port temperatures Tc of compressor 100 and evaporator 200
DSH.Also, monitoring modular 50 is monitored discharge superheat DSH in air-conditioning system operational process, and judges air-conditioning system
Discharge superheat DSH whether be more than or equal to the first preset value M1, if discharge superheat DSH be more than or equal to the first preset value M1
(such as A DEG C) illustrates that the return-air degree of superheat SSH of air-conditioning system is sufficiently large, and control module 60 then controls the outdoor unit of air-conditioning system
It keeps operating normally, at this point, the refrigerant that the gas returning port of compressor 100 sucks is pure gaseous state；If discharge superheat DSH is less than
First preset value M1, control module 60 then further judge whether the duration reaches (such as 20 points of the first preset time t 1
Clock), if the duration reaches the first preset time t 1, control module 60 ifs, controls timer 400 and starts timing.
Further, control module 60 judges whether the timing time t of timer 400 reaches 2 (example of the second preset time t
Such as 30 minutes), when the timing time t of timer 400 reaches the second preset time t 2, in other words, discharge superheat DSH is less than first
When the duration of preset value M1 reaches the second preset time t 2, the return-air degree of superheat SSH of corresponding air-conditioning system is relatively low, control
The outdoor unit that module 60 controls air-conditioning system is shut down, to prevent the gas returning port of compressor 100 from sucking liquid refrigerant, to avoid
Liquid hammer occurs for compressor 100.
According to one embodiment of present invention, during timer 400 carries out timing, if discharge superheat DSH
More than or equal to the first preset value M1 and continuing third preset time t 3, control module 60 is then zeroed out timer 400, and after
It is continuous to judge whether discharge superheat DSH meets the condition that timer 400 starts timing.
A specific embodiment according to the present invention, third preset time t 3 can be 5 minutes.
Specifically, during timer 400 carries out timing, 50 real-time monitoring discharge superheat DSH of monitoring modular,
If discharge superheat DSH is more than or equal to the first preset value M1 (such as A degrees Celsius), further judgement continues if control module 60
Whether the time reaches third preset time t 3 (such as 5 minutes), if discharge superheat DSH is more than or equal to the first preset value M1
(such as A degrees Celsius) and continue third preset time t 3, control module 60 is then zeroed out timer 400, and rejudges
Whether discharge superheat DSH meets the condition that timer 400 starts timing.
According to one embodiment of present invention, after control outdoor unit is shut down, control module 60 also judges that the 4th is default
Whether the times N that air-conditioning system carries out liquid impact prevention protection in time t4 is more than default time (such as 2 times), wherein if the 4th is pre-
If it is more than default time (such as 2 times) that air-conditioning system, which carries out the times N of liquid impact prevention protection, in time t4, the then control room of control module 60
Irrecoverable booting in the case where non-power-off of outer machine；If air-conditioning system carries out liquid impact prevention protection in the 4th preset time t 4
Times N is less than default time (such as 2 times), and control module 60 is then zeroed out timer 400, and in the 5th preset time t 5
Control outdoor unit restarting afterwards.
A specific embodiment according to the present invention, the 4th preset time t 4 can be 120 minutes, and the 5th preset time t 5 can
It is 6 minutes.
Specifically, counter carries out the number (i.e. the number of control outdoor unit shutdown) of liquid impact prevention protection to air-conditioning system
N is counted, if the times N that the interior air-conditioning system of the 4th preset time t 4 (such as 120 minutes) carries out liquid impact prevention protection is more than
Default time (such as 1 time), it is relatively low to illustrate that the return-air degree of superheat SSH of air-conditioning system continues, control module 60 then controls outdoor unit and exists
Irrecoverable booting in the case where non-power-off needs first to carry out power down process to outdoor unit, outdoor unit recovery can just opened in other words
Machine.If the times N that the interior air-conditioning system of the 4th preset time t 4 (such as 120 minutes) carries out liquid impact prevention protection is less than default time
(such as 1 time), control module 60 is then zeroed out timer 400, and automatic afterwards in the 5th preset time t 5 (such as 6 minutes)
Outdoor unit restarting is controlled, and rejudges whether discharge superheat DSH meets the condition that timer 400 starts timing.
To sum up, the liquid impact prevention control device of the air-conditioning system proposed according to embodiments of the present invention, passes through the first temperature sensing
Device detects the exhaust port temperatures of compressor, and second temperature sensor detects the middle portion temperature of evaporator, the inspection of third temperature sensor
The middle portion temperature of condenser is surveyed, computing module is in air-conditioning system refrigerating operaton according to the middle part temperature of exhaust port temperatures and condenser
Degree calculates the discharge superheat of compressor, and in air-conditioning system heating operation according to the middle part temperature of exhaust port temperatures and evaporator
Degree calculates the discharge superheat of compressor, also, monitoring modular 50 carries out discharge superheat in air-conditioning system operational process
Monitoring, control module control timer when discharge superheat is less than the first preset value and continues the first preset time and start to count
When, and the outdoor unit shutdown of air-conditioning system is controlled when the timing time of timer reaches the second preset time to prevent compressor
Liquid hammer occurs.It follows that the liquid impact prevention control device of the air-conditioning system of the embodiment of the present invention passes through real-time monitoring compressor
Discharge superheat thereby may be ensured that the refrigerant for returning to compressor is pure gaseous state, prevent liquid system to carry out liquid impact prevention protection
Cryogen enters compressor, avoids compressor that liquid hammer occurs.Also, since discharge superheat numerical value is larger, it is convenient for data inspection
It surveys and controls, improve the precision of liquid impact prevention control, improve the safety and reliability of air-conditioning system operation.
Fig. 6 is the block diagram of air-conditioning system according to an embodiment of the present invention.As shown in fig. 6, the air-conditioning system 500 is wrapped
Include the liquid impact prevention control device 600 of air-conditioning system.
To sum up, the air-conditioning system proposed according to embodiments of the present invention, by the liquid impact prevention control device of above-mentioned air-conditioning system,
The discharge superheat of real-time monitoring compressor thereby may be ensured that the refrigeration for returning to compressor return air mouth to carry out liquid impact prevention protection
Agent is pure gaseous state, prevents liquid refrigerant from entering compressor, avoids compressor that liquid hammer occurs.Also, due to discharge superheat degree
It is worth larger, is convenient for Data Detection and control, improve the precision of liquid impact prevention control, improves the safety of air-conditioning system operation
Property and reliability.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of liquid impact prevention control method of air-conditioning system, which is characterized in that the air-conditioning system include compressor, condenser and
Evaporator the described method comprises the following steps:
The exhaust port temperatures of the compressor are detected, and detect the middle portion temperature of the condenser and the middle part temperature of the evaporator
Degree；
When the air-conditioning system refrigerating operaton, according to the calculating of the middle portion temperature of the exhaust port temperatures and the condenser
The discharge superheat of compressor；
When the air-conditioning system heating operation, according to the calculating of the middle portion temperature of the exhaust port temperatures and the evaporator
The discharge superheat of compressor；
The discharge superheat is monitored in the air-conditioning system operational process；
If the discharge superheat is less than the first preset value and continues the first preset time, controls timer and starts timing,
And the outdoor unit that the air-conditioning system is controlled when the timing time of the timer reaches the second preset time is shut down to prevent
Liquid hammer occurs for the compressor.
2. the liquid impact prevention control method of air-conditioning system according to claim 1, which is characterized in that carried out in the timer
It is right if the discharge superheat is more than or equal to first preset value and continues third preset time during timing
The timer is zeroed out, and continues to judge whether the discharge superheat meets the condition that timer starts timing.
3. the liquid impact prevention control method of air-conditioning system according to claim 1 or 2, which is characterized in that controlling the room
After outer machine is shut down, whether the number for also judging that the air-conditioning system carries out liquid impact prevention protection in the 4th preset time is more than default
It is secondary, wherein
If it is more than default time that the air-conditioning system, which carries out the number of liquid impact prevention protection, in the 4th preset time, institute is controlled
State outdoor unit irrecoverable booting in the case where non-power-off；
If the number that the air-conditioning system carries out liquid impact prevention protection in the 4th preset time is less than default time, to institute
It states timer to be zeroed out, and controls the outdoor unit restarting after the 5th preset time.
4. the liquid impact prevention control method of air-conditioning system according to claim 3, which is characterized in that first preset time
It is 20 minutes, second preset time is 30 minutes, and third preset time is 5 minutes, and the 4th preset time is 120 points
Clock, the 5th preset time are 6 minutes.
5. a kind of liquid impact prevention control device of air-conditioning system characterized by comprising
First temperature sensor of the exhaust outlet of compressor is set, and first temperature sensor is for detecting the compressor
Exhaust port temperatures；
Second temperature sensor in the middle part of evaporator is set, and the second temperature sensor is for detecting in the evaporator
Portion's temperature；
The third temperature sensor in portion within the condenser is set, and the third temperature sensor is for detecting in the condenser
Portion's temperature；
Computing module, for the middle part in the air-conditioning system refrigerating operaton according to the exhaust port temperatures and the condenser
The discharge superheat of compressor described in temperature computation, and in the air-conditioning system heating operation according to the exhaust port temperatures
The discharge superheat of the compressor is calculated with the middle portion temperature of the evaporator；
Monitoring modular, for being monitored in the air-conditioning system operational process to the discharge superheat；
Control module, for controlling timer when the discharge superheat is less than the first preset value and continues the first preset time
Start timing, and the outdoor unit for controlling when the timing time of the timer reaches the second preset time the air-conditioning system stops
Machine is to prevent the compressor from liquid hammer occurs.
6. the liquid impact prevention control device of air-conditioning system according to claim 5, which is characterized in that carried out in the timer
It is described if the discharge superheat is more than or equal to first preset value and continues third preset time during timing
Control module is then zeroed out the timer, and continues to judge whether the discharge superheat meets timer and start timing
Condition.
7. the liquid impact prevention control device of air-conditioning system according to claim 5 or 6, which is characterized in that controlling the room
After outer machine is shut down, the control module also judges the number of the air-conditioning system progress liquid impact prevention protection in the 4th preset time
It whether is more than default time, wherein
If it is more than default time that the air-conditioning system, which carries out the number of liquid impact prevention protection, in the 4th preset time, the control
Module then controls the outdoor unit irrecoverable booting in the case where non-power-off；
If the number that the air-conditioning system carries out liquid impact prevention protection in the 4th preset time is less than default time, the control
Molding block is then zeroed out the timer, and the outdoor unit restarting is controlled after the 5th preset time.
8. the liquid impact prevention control device of air-conditioning system according to claim 7, which is characterized in that first preset time
It is 20 minutes, second preset time is 30 minutes, and third preset time is 5 minutes, and the 4th preset time is 120 points
Clock, the 5th preset time are 6 minutes.
9. a kind of air-conditioning system, which is characterized in that the liquid-proof including the air-conditioning system according to any one of claim 5-8
Hit control device.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034105.4A CN106766444B (en) | 2016-11-17 | 2016-11-17 | The liquid impact prevention control method and control device and air-conditioning system of air-conditioning system |
| PCT/CN2017/089642 WO2018090626A1 (en) | 2016-11-17 | 2017-06-22 | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
| CA3010767A CA3010767A1 (en) | 2016-11-17 | 2017-06-22 | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
| EP17870765.9A EP3396262B1 (en) | 2016-11-17 | 2017-06-22 | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
| US16/051,496 US20180335237A1 (en) | 2016-11-17 | 2018-08-01 | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
Applications Claiming Priority (1)
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| CN201611034105.4A CN106766444B (en) | 2016-11-17 | 2016-11-17 | The liquid impact prevention control method and control device and air-conditioning system of air-conditioning system |
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| WO2018090626A1 (en) * | 2016-11-17 | 2018-05-24 | 广东美的暖通设备有限公司 | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
| CN107062564B (en) * | 2017-06-13 | 2020-02-11 | 广东美的暖通设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
| CN107421076B (en) * | 2017-08-18 | 2020-01-07 | 广东美的暖通设备有限公司 | Control method and control system of air conditioner and air conditioner |
| CN110454953B (en) * | 2019-08-05 | 2021-09-21 | 广东美的制冷设备有限公司 | Control method and device of air conditioner and air conditioner |
| CN117052643B (en) * | 2023-10-11 | 2024-04-26 | 浙江极氪汽车研究开发有限公司 | Control method and control system of electric compressor, air conditioning system and vehicle |
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