CN106403429A - Liquid shock preventing control method and device for air conditioner system and air conditioner system - Google Patents
Liquid shock preventing control method and device for air conditioner system and air conditioner system Download PDFInfo
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- CN106403429A CN106403429A CN201611027983.3A CN201611027983A CN106403429A CN 106403429 A CN106403429 A CN 106403429A CN 201611027983 A CN201611027983 A CN 201611027983A CN 106403429 A CN106403429 A CN 106403429A
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- conditioning system
- preset time
- 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
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a liquid shock preventing control method and device for an air conditioner system and the air conditioner system. The method includes the following steps that the exhaust superheat degree of a compressor is obtained in real time, and the exhaust superheat degree is monitored in the running process of the air conditioner system; if the exhaust superheat degree is smaller than the first preset value and lasts for the first preset time, a timer is controlled to begin to conduct timing; and when the timing time of the timer reaches the second preset time, an outdoor unit of the air conditioner system is controlled to be stopped so as to prevent the liquid shocks from happening to the compressor. Thus, by means of the liquid shock preventing control method of the embodiment, it can be ensured that a refrigerant returning to and sucked by a compressor air returning opening is in a pure gas state by monitoring the exhaust superheat degree in the air conditioner system in real time, and therefore the liquid-state refrigerant is prevented from entering the compressor, and liquid shocks are avoided. In addition, the exhaust superheat value of the embodiment is large, data detection and control are facilitated, the liquid shock preventing control precision is improved, and safety and reliability of running of the air conditioner system are improved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to a kind of liquid impact prevention control method 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 technology
Within air-conditioning systems, excessive, expansion valve (or regulating valve) the degree of regulation (open degree) of cold-producing medium or lubricating oil excessive,
The factor such as the thermic load of evaporimeter is unstable is all likely to result in liquid refrigerant and enters compresser cylinder, makes compressor that liquid to occur
Hit, long-time, heavier liquid hammer can make the component undergoes deformation such as the valve block of compressor, rupture, or even causes the permanent of compressor
Property damage.
In the related, it is mostly the return-air degree of superheat by real-time monitoring air-conditioning system, to ensure returning of compressor
The cold-producing medium that gas port sucks is pure gaseous state, thus preventing liquid refrigerant from entering compressor and avoiding 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 controlling is relatively low, and reliability is poor.
Therefore, the compressor liquid impact prevention control technology in correlation technique needs to improve.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this reason, the present invention
One purpose is to propose a kind of liquid impact prevention control method of air-conditioning system, and the method passes through the row in real-time monitoring air-conditioning system
The gas degree of superheat, to prevent compressor from liquid hammer occurring, substantially increases the safety and reliability of air-conditioning system operation.
Further object is that proposing a kind of liquid impact prevention control device of air-conditioning system.The present invention another
Purpose is to propose a kind of air-conditioning system.
For reaching above-mentioned purpose, a kind of liquid impact prevention control method of air-conditioning system that one aspect of the present invention embodiment proposes,
Comprise the following steps：Obtain the discharge superheat of compressor in real time, and to described exhaust in described air-conditioning system running
The degree of superheat is monitored；If described discharge superheat is less than the first preset value and continues the first Preset Time, control timing
Device starts timing；When the timing time of described timer reaches the second Preset Time, control the off-premises station of described air-conditioning system
Shut down to prevent described compressor from liquid hammer occurring.
The liquid impact prevention control method of the air-conditioning system proposing according to embodiments of the present invention, by the real-time row obtaining compressor
The gas degree of superheat, and in air-conditioning system running, discharge superheat is monitored, if discharge superheat is pre- less than first
If value and continue the first Preset Time, then control timer to start timing, and the timing time in timer reaches second and presets
During the time, the off-premises station of air-conditioning system is controlled to shut down to prevent compressor from liquid hammer occurring.It follows that the sky of the embodiment of the present invention
The liquid impact prevention control method of adjusting system carries out liquid impact prevention protection by the discharge superheat of real-time monitoring compressor, such that it is able to
Ensure that the cold-producing medium returning to compressor return air mouth is pure gaseous state, prevent liquid refrigerant from entering compressor, it is to avoid compressor occurs
Liquid hammer.And, because discharge superheat numerical value is larger, it is convenient for Data Detection and liquid impact prevention controls, improve liquid impact prevention control
The precision of system, improves the safety and reliability of air-conditioning system operation.
According to one embodiment of present invention, during described timer carries out timing, if described discharge superheat
Degree more than or equal to described first preset value and continues the 3rd Preset Time, then described timer is zeroed out, and continues to judge
Whether described discharge superheat meets the condition that timer starts timing.
According to one embodiment of present invention, after controlling described off-premises station to shut down, also judge in the 4th Preset Time
Whether the number of times that described air-conditioning system carries out liquid impact prevention protection exceedes default time, wherein, if institute in described 4th Preset Time
State air-conditioning system and carry out the number of times of liquid impact prevention protection and exceed default time, then control described off-premises station in the case of power-off
Recover start；If described air-conditioning system carries out the number of times of liquid impact prevention protection not less than default time in described 4th Preset Time,
Then described timer is zeroed out, and controls described off-premises station to restart after the 5th Preset Time.
According to one embodiment of present invention, the described real-time discharge superheat obtaining compressor, including：Detect described pressure
The exhaust port pressure of contracting machine, and detect the exhaust port temperatures of described compressor；According to described exhaust port pressure and described exhaust outlet
The discharge superheat of compressor described in temperature computation.
According to one embodiment of present invention, described first Preset Time can be 20 minutes, and described second Preset Time can
For 30 minutes, described 3rd Preset Time can be 5 minutes, and described 4th Preset Time can be 120 minutes, the described 5th default when
Between can be 6 minutes.
For reaching above-mentioned purpose, a kind of liquid impact prevention of air-conditioning system that another aspect of the present invention embodiment proposes controls dress
Put, including：Acquisition module, for the real-time discharge superheat obtaining compressor；Monitoring modular, in described air-conditioning system fortune
During row, described discharge superheat is monitored；Control module, for being less than the first preset value in described discharge superheat
And continue during the first Preset Time, to control timer to start timing, and described timer timing time reach second default when
Between when control the off-premises station of described air-conditioning system to shut down to prevent described compressor from liquid hammer occurring.
The liquid impact prevention control device of the air-conditioning system proposing according to embodiments of the present invention, obtains pressure in real time by acquisition module
The discharge superheat of contracting machine, and by the discharge superheat in monitoring module monitors air-conditioning system running, control module exists
Discharge superheat is less than the first preset value and continues to control timer to start timing, and the meter in timer during the first Preset Time
When the time reach during the second Preset Time control air-conditioning system off-premises station shut down with prevent compressor occur liquid hammer.Thus may be used
Know, the liquid impact prevention control device of the air-conditioning system of the embodiment of the present invention is carried out by the discharge superheat of real-time monitoring compressor
Liquid impact prevention is protected, and thereby may be ensured that the cold-producing medium returning to compressor return air mouth is pure gaseous state, prevents liquid refrigerant from entering pressure
Contracting machine, it is to avoid compressor occurs liquid hammer.And, because discharge superheat numerical value is larger, it is convenient for Data Detection and liquid impact prevention
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 described timer carries out timing, if described discharge superheat
Degree more than or equal to described first preset value and continues the 3rd Preset Time, and described control module is then carried out clearly to described timer
Zero, and continue to judge whether described discharge superheat meets the condition that timer starts timing.
According to one embodiment of present invention, after controlling described off-premises station to shut down, described control module also judges the
In four Preset Times, described air-conditioning system carries out the number of times of liquid impact prevention protection and whether exceedes default time, wherein, if the described 4th
In Preset Time, described air-conditioning system carries out the number of times of liquid impact prevention protection and exceedes default time, and described control module then controls described room
The irrecoverable start in the case of non-power-off of outer machine；If described air-conditioning system carries out liquid impact prevention in described 4th Preset Time
Not less than default time, described control module is then zeroed out the number of times of protection to described timer, and after the 5th Preset Time
Described off-premises station is controlled to restart.
According to one embodiment of present invention, the liquid impact prevention control device of described air-conditioning system also includes being arranged on described pressure
The temperature sensor of the exhaust outlet of contracting machine and pressure sensor, described temperature sensor is used for detecting the exhaust outlet of described compressor
Temperature, described pressure sensor is used for detecting the exhaust port pressure of described compressor, described acquisition module is used for according to described row
Outlet pressure and the discharge superheat of the described exhaust port temperatures described compressor of calculating.
According to a specific embodiment of the present invention, described first Preset Time can be 20 minutes, described second default when
Between can be 30 minutes, the 3rd Preset Time can be 5 minutes, and described 4th Preset Time can be 120 minutes, the described 5th default when
Between can be 6 minutes.
For reaching above-mentioned purpose, a kind of air-conditioning system that another aspect of the invention embodiment proposes, including described embodiment
Air-conditioning system liquid impact prevention control device.
The air-conditioning system proposing according to embodiments of the present invention, by the liquid impact prevention control device of above-mentioned air-conditioner, supervises in real time
The discharge superheat of measured compressed machine, to carry out liquid impact prevention protection, thereby may be ensured that the cold-producing medium returning to compressor return air mouth is pure
Gaseous state, prevents liquid refrigerant from entering compressor, it is to avoid compressor occurs liquid hammer.And, because discharge superheat numerical value is larger,
It is convenient for Data Detection and liquid impact prevention controls, improve the precision of liquid impact prevention control, improve the safety of air-conditioning system operation
Property and reliability.
Brief description
Fig. 1 is the flow chart of the liquid impact prevention control method of air-conditioning system according to embodiments 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 the air-conditioning system according to one specific embodiment of the present invention；
Fig. 4 is the block diagram of the liquid impact prevention control device of air-conditioning system according to embodiments of the present invention；
Fig. 5 is the structural representation of air-conditioning system according to an embodiment of the invention；And
Fig. 6 is the block diagram of air-conditioning system according to embodiments of the present invention.
Reference：
Acquisition module 10, monitoring modular 20, control module 30, temperature sensor 40 and pressure sensor 50；
The liquid impact prevention control device 200 of air-conditioning system 100 and air-conditioning system.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the liquid impact prevention control method of air-conditioning system, the air-conditioning system of embodiment of the present invention proposition to be described
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 embodiments of the present invention.As shown in figure 1, should
The liquid impact prevention control method of air-conditioning system comprises the following steps：
S10：Obtain the discharge superheat DSH of compressor in real time, and to discharge superheat in air-conditioning system running
DSH is monitored.
According to one embodiment of present invention, obtain the discharge superheat DSH of compressor in real time, including：Detection compressor
Exhaust port pressure P, and detect the exhaust port temperatures Tc of compressor；Pressure is calculated according to exhaust port pressure P and exhaust port temperatures Tc
The discharge superheat DSH of contracting machine.
Specifically, the job analysis based on air-conditioning system, can obtain the pressure-enthalpy chart shown in Fig. 2, and wherein, ordinate is
Logarithm value LogP of the absolute pressure of air-conditioning system, abscissa is the ratio enthalpy h of air-conditioning system.As shown in Fig. 2 air-conditioning system exists
1-2 section is in overheated exothermic phase, and now, the exhaust outlet of compressor discharges the gaseous refrigerant of HTHP；Air-conditioning system exists
2-4 section is in level pressure exothermic phase；Air-conditioning system is in level pressure endothermic phase in 5-6 section；It is overheated that air-conditioning system is in 6-7 section
Endothermic phase, now, the gas returning port of compressor sucks cold-producing medium.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 more than the numerical value of return-air degree of superheat SSH, therefore, if exhaust
Degree of superheat DSH is in preset range, then can ensure that the cold-producing medium that compressor return air mouth sucks is pure gaseous state.
In the running of air-conditioning system, exhaust port pressure P of real-time detection compressor and exhaust port temperatures Tc, obtain
Module can obtain corresponding exhaust saturation temperature value Tp according to exhaust port pressure P of real-time detection compressor, and calculates exhaust outlet
The difference of temperature Tc and exhaust saturation temperature value Tp, using as real-time discharge superheat DSH, and then can be utilized and be vented in real time
Degree of superheat DSH carries out liquid impact prevention control.
S20：If discharge superheat DSH is less than the first preset value M1 and continues the first preset time t 1, control timing
Device starts timing.
S30：When the timing time t of timer reaches the second preset time t 2, the off-premises station of air-conditioning system is controlled to shut down
To prevent compressor from liquid hammer occurring.
According to a specific embodiment of the present invention, the first preset time t 1 can be 20 minutes, and the second preset time t 2 can
For 30 minutes, the first preset value M1 can be A DEG C.
Specifically, obtain in real time the discharge superheat DSH of compressor, and to being vented in air-conditioning system running
Temperature DSH is monitored, and whether is more than or equal to the first preset value M1 with the discharge superheat DSH judging air-conditioning system, if row
Gas degree of superheat DSH is more than or equal to the first preset value M1 (such as A DEG C), then return-air degree of superheat SSH of explanation air-conditioning system is sufficiently large,
The off-premises station controlling air-conditioning system keeps normal operation, and now, the cold-producing medium that the gas returning port of compressor sucks is pure gaseous state；If
Discharge superheat DSH is less than the first preset value M1, then determine whether whether the duration reaches the first preset time t 1 (for example
20 minutes), if the duration reaches the first preset time t 1, control timer to 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, that is, say, discharge superheat DSH be less than the first preset value M1 lasting when
Between when reaching the second preset time t 2, return-air degree of superheat SSH of air-conditioning system is low, now controls the off-premises station of air-conditioning system to stop
Machine, sucks liquid refrigerant with the gas returning port preventing compressor, thus avoiding compressor that liquid hammer occurs.
According to one embodiment of present invention, during timer carries out timing, if discharge superheat DSH is more than
Equal to the first preset value M1 and continue the 3rd preset time t 3, then timer is zeroed out, and continues to judge discharge superheat
Whether DSH meets the condition that timer starts timing.
According to a specific embodiment of the present invention, the 3rd preset time t 3 can be 5 minutes.
Specifically, during timer carries out timing, real-time monitoring discharge superheat DSH, if discharge superheat
Degree DSH is more than or equal to the first preset value M1 (such as A degree Celsius), then determine whether the duration whether reach the 3rd default when
Between t3 (such as 5 minutes), if discharge superheat DSH is more than or equal to the first preset value M1 (such as A degree Celsius) and continue the 3rd
Preset time t 3, then be zeroed out to timer, and rejudge discharge superheat DSH and whether meet timer and start timing
Condition.
According to one embodiment of present invention, after controlling off-premises station to 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 exceedes 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 exceedes default time (such as 1 time), then control off-premises station in the case of non-power-off
Irrecoverable start；If air-conditioning system carries out the times N of liquid impact prevention protection not less than default (example in the 4th preset time t 4
As 1 time), then timer is zeroed out, and controls off-premises station to restart after the 5th preset time t 5.
According to a specific embodiment of the present invention, the 4th preset time t 4 can be 120 minutes, and the 5th preset time t 5 can
For 6 minutes.
Specifically, (off-premises station can be controlled to shut down by the number of times that counter carries out liquid impact prevention protection to air-conditioning system
Number of times) N counted, if the 4th preset time t 4 (such as 120 minutes) interior air-conditioning system carry out liquid impact prevention protection time
Number N exceedes default time (such as 1 time), illustrates that return-air degree of superheat SSH of air-conditioning system continues low, then control off-premises station non-disconnected
Irrecoverable start in the case of electricity, that is, say, needs first to carry out power down process to off-premises station, and off-premises station just can be made to recover start.
If the 4th preset time t 4 (such as 120 minutes) interior air-conditioning system carries out the times N of liquid impact prevention protection not less than default (example
As 1 time), then timer is zeroed out, and automatically controls outdoor machine after the 5th preset time t 5 (such as 6 minutes) again opening
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：Open liquid impact prevention protection to control.
S102：Obtain the discharge superheat DSH of compressor in real time, and to discharge superheat in air-conditioning system running
DSH is monitored.
S103：Judge whether discharge superheat DSH is less than the first preset value M1.
If it is, execution step S104；If it is not, then execution step S105.
S104：Judge whether the duration reaches the first preset time t 1.
If it is, execution step S106；If it is not, then execution step S103.
S105：The off-premises station controlling air-conditioning system keeps normal operation.
S106：Timer is controlled to start timing.
S107：Judge whether discharge superheat DSH is more than or equal to the first preset value M1.
If it is, execution step S108；If it is not, then execution step S110.
S108：Judge whether the duration reaches the 3rd preset time t 3.
If it is, execution step S109；If it is not, then execution step S107.
S109：Timer is controlled to be zeroed out, and execution step S102.
S110：Judge whether the timing time t of timer reaches the second preset time t 2.
If it is, execution step S111；If it is not, then execution step S107.
S111：The off-premises station controlling air-conditioning system is shut down.
S112：Judge that air-conditioning system in the 4th preset time t 4 carries out the times N of liquid impact prevention protection and whether exceedes default time
(such as 1 time).
If it is, execution step S113；If it is not, then execution step S114.
S113：Control off-premises station irrecoverable start in the case of non-power-off.
S114：Control timer to be zeroed out, and control off-premises station to restart after the 5th preset time t 5, and execute
Step S102.
S115：Liquid impact prevention controls and terminates.
To sum up, the liquid impact prevention control method of the air-conditioning system proposing according to embodiments of the present invention, obtains compression by real-time
The discharge superheat of machine, and in air-conditioning system running, discharge superheat is monitored, if discharge superheat is less than
First preset value and continue the first Preset Time, then control timer to start timing, and the timing time in timer reaches the
During two Preset Times, the off-premises station of air-conditioning system is controlled to shut down to prevent compressor from liquid hammer occurring.It follows that the present invention is implemented
The liquid impact prevention control method of the air-conditioning system of example carries out liquid impact prevention protection by the discharge superheat of real-time monitoring compressor, from
And can ensure that compressor return air mouth cold-producing medium be pure gaseous state, prevent liquid refrigerant enter compressor, it is to avoid compressor is sent out
Raw liquid hammer.And, because discharge superheat numerical value is larger, it is convenient for Data Detection and liquid impact prevention controls, improve liquid impact prevention
The precision controlling, improves the safety and reliability of air-conditioning system operation.
Fig. 4 is the block diagram of the liquid impact prevention control device of air-conditioning system according to embodiments of the present invention.As Fig. 4 institute
Show, this liquid impact prevention control device includes：Acquisition module 10, monitoring modular 20 and control module 30, wherein, acquisition module 10 is used for
Obtain the discharge superheat DSH of compressor in real time；Monitoring modular 20 is used in air-conditioning system running to discharge superheat
DSH is monitored；Control module 30 is used for being less than the first preset value M1 in discharge superheat DSH and continuing the first preset time t 1
When control timer 60 start timing, and when the timing time of timer 60 reaches the second preset time t 2 control air-conditioning system
Off-premises station shut down with prevent compressor occur liquid hammer.
According to a specific embodiment of the present invention, the first preset time t 1 can be 20 minutes, and the second preset time t 2 can
For 30 minutes, the first preset value M1 can be A DEG C.
Specifically, acquisition module 10 obtains the discharge superheat DSH of compressor in real time, and monitoring modular 20 is in air-conditioning system
In running, discharge superheat DSH is monitored, and judges the discharge superheat DSH of air-conditioning system whether more than or equal to the
One preset value M1, if discharge superheat DSH is more than or equal to the first preset value M1 (such as A DEG C), illustrates the return-air of air-conditioning system
Degree of superheat SSH is sufficiently large, and control module 30 then controls the off-premises station of air-conditioning system to keep normal to run, now, the returning of compressor
The cold-producing medium that gas port sucks is pure gaseous state；If discharge superheat DSH is less than the first preset value M1, control module 30 is then further
Judge whether the duration reaches the first preset time t 1 (such as 20 minutes), if the duration reaches the first Preset Time
T1, control module 30 then controls timer 60 to start timing.
Further, control module 30 judges whether the timing time t of timer 60 reaches the second preset time t 2 (for example
30 minutes), when the timing time t of timer 60 reaches the second preset time t 2, that is, say, it is pre- that discharge superheat DSH is less than first
If the duration of value M1 reaches the second preset time t 2, return-air degree of superheat SSH of corresponding air-conditioning system is low, controls mould
Block 30 controls the off-premises station of air-conditioning system to shut down, and sucks liquid refrigerant with the gas returning port preventing compressor, thus avoiding compressing
There is liquid hammer in machine.
According to one embodiment of present invention, as shown in figure 5, the liquid impact prevention control device of air-conditioning system also includes being arranged on
The temperature sensor 40 of the exhaust outlet of compressor and pressure sensor 50, temperature sensor 40 is used for detecting the exhaust outlet of compressor
Temperature Tc, pressure sensor 50 is used for detecting exhaust port pressure P of compressor, acquisition module 10 is used for according to exhaust port pressure P
Calculate the discharge superheat DSH of compressor with exhaust port temperatures Tc.
According to a specific embodiment of the present invention, temperature sensor 40 can be exhaust temperature-sensitive bag.
Based on the job analysis of air-conditioning system, the pressure-enthalpy chart shown in Fig. 2 can be obtained, wherein, ordinate is air-conditioning system
Absolute pressure logarithm value LogP, abscissa be air-conditioning system ratio enthalpy h.As shown in Fig. 2 air-conditioning system is at 1-2 section
In overheated exothermic phase, now, the exhaust outlet of compressor discharges the gaseous refrigerant of HTHP；Air-conditioning system is at 2-4 section
In level pressure exothermic phase；Air-conditioning system is in level pressure endothermic phase in 5-6 section；Air-conditioning system is in overheated heat absorption rank in 6-7 section
Section, now, the gas returning port of compressor sucks cold-producing medium.As shown in Fig. 2 the discharge superheat DSH of air-conditioning system and return-air are overheated
SSH is corresponding for degree, and the numerical value of discharge superheat DSH is more than the numerical value of return-air degree of superheat SSH, therefore, if discharge superheat
DSH is in preset range, then can ensure that the cold-producing medium that compressor return air mouth sucks is pure gaseous state.
In the running of air-conditioning system, exhaust port pressure P of real-time detection compressor and exhaust port temperatures Tc, obtain
Module can obtain corresponding exhaust saturation temperature value Tp according to exhaust port pressure P of real-time detection compressor, and calculates exhaust outlet
The difference of temperature Tc and exhaust saturation temperature value Tp, using as real-time discharge superheat DSH, and then can be utilized and be vented in real time
Degree of superheat DSH carries out liquid impact prevention control.
According to one embodiment of present invention, during timer 60 carries out timing, if discharge superheat DSH is big
In equal to the first preset value M1 and continue the 3rd preset time t 3, control module 30 is then zeroed out to timer 60, and continues
Judge whether discharge superheat DSH meets the condition that timer 60 starts timing.
According to a specific embodiment of the present invention, the 3rd preset time t 3 can be 5 minutes.
Specifically, during timer 60 carries out timing, monitoring modular 20 real-time monitoring discharge superheat DSH,
If discharge superheat DSH is more than or equal to the first preset value M1 (such as A degree Celsius), control module 30 then determines whether to continue
Whether the time reaches the 3rd 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 degree Celsius) and continue the 3rd preset time t 3, control module 30 is then zeroed out to timer 60, and the row of rejudging
Whether gas degree of superheat DSH meets the condition that timer 60 starts timing.
According to one embodiment of present invention, after controlling off-premises station to shut down, control module 30 also judges that the 4th presets
In time t4, air-conditioning system carries out the times N of liquid impact prevention protection and whether exceedes default time (such as 1 time), wherein, if the 4th is pre-
If air-conditioning system carries out the times N of liquid impact prevention protection and exceedes default time (such as 1 time), control module 30 then control room in time t4
The irrecoverable start in the case of non-power-off of outer machine；If air-conditioning system carries out liquid impact prevention protection in the 4th preset time t 4
Not less than default time (such as 1 time), control module 30 is then zeroed out times N to timer 60, and in the 5th preset time t 5
Off-premises station is controlled to restart afterwards.
According to a specific embodiment of the present invention, the 4th preset time t 4 can be 120 minutes, and the 5th preset time t 5 can
For 6 minutes.
Specifically, counter carries out the number of times (number of times controlling off-premises station to shut down) of liquid impact prevention protection to air-conditioning system
N is counted, if the times N that the 4th preset time t 4 (such as 120 minutes) interior air-conditioning system carries out liquid impact prevention protection exceedes
Default time (such as 1 time), illustrates that return-air degree of superheat SSH of air-conditioning system continues low, control module 30 then controls off-premises station to exist
In the case of non-power-off, irrecoverable start, that is, say, needs first to carry out power down process to off-premises station, and off-premises station just can be made to recover to open
Machine.If the 4th preset time t 4 (such as 120 minutes) interior air-conditioning system carries out the times N of liquid impact prevention protection not less than default time
(such as 1 time), control module 30 is then zeroed out to timer 60, and automatic afterwards in the 5th preset time t 5 (such as 6 minutes)
Control off-premises station to restart, and rejudge whether discharge superheat DSH meets the condition that timer 60 starts timing.
To sum up, the liquid impact prevention control device of the air-conditioning system proposing according to embodiments of the present invention, real-time by acquisition module
Obtain the discharge superheat of compressor, and by the discharge superheat in monitoring module monitors air-conditioning system running, control
Module controls timer to start timing when discharge superheat is less than the first preset value and continues the first Preset Time, and in timing
The timing time of device reaches and controls the off-premises station of air-conditioning system to shut down to prevent compressor from liquid hammer occurring during the second Preset Time.By
This understands, 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 Lai
Carry out liquid impact prevention protection, thereby may be ensured that the cold-producing medium returning to compressor return air mouth is pure gaseous state, prevent liquid refrigerant from entering
Enter compressor, it is to avoid compressor occurs liquid hammer.And, because discharge superheat numerical value is larger, it is convenient for Data Detection and prevents
Liquid hammer controls, and improves the precision of liquid impact prevention control, improves the safety and reliability of air-conditioning system operation.
Fig. 6 is the block diagram of air-conditioning system according to embodiments of the present invention.As shown in fig. 6, this air-conditioning system 100 is wrapped
Include the liquid impact prevention control device 200 of air-conditioning system.
To sum up, the air-conditioning system proposing according to embodiments of the present invention, by the liquid impact prevention control device of above-mentioned air-conditioner, real
When monitoring compressor discharge superheat to carry out liquid impact prevention protection, thereby may be ensured that the cold-producing medium returning to compressor return air mouth
For pure gaseous state, prevent liquid refrigerant from entering compressor, it is to avoid compressor occurs liquid hammer.And, due to discharge superheat numerical value
Larger, it is convenient for Data Detection and liquid impact prevention controls, improve the precision of liquid impact prevention control, improve air-conditioning system operation
Safety and reliability.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation of instruction such as pin ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
Connect or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limit unless otherwise clear and definite.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (11)
1. a kind of liquid impact prevention control method of air-conditioning system is it is characterised in that comprise the following steps：
Obtain the discharge superheat of compressor in real time, and in described air-conditioning system running, described discharge superheat is carried out
Monitoring；
If described discharge superheat is less than the first preset value and continues the first Preset Time, timer is controlled to start timing；
When the timing time of described timer reaches the second Preset Time, control described air-conditioning system off-premises station shut down in case
Only there is liquid hammer in described compressor.
2. the liquid impact prevention control method of air-conditioning system according to claim 1 is it is characterised in that carry out in described timer
During timing, if described discharge superheat is more than or equal to described first preset value and continues the 3rd Preset Time, right
Described timer is zeroed out, and continues to judge whether described discharge superheat meets the condition that timer starts timing.
3. the liquid impact prevention control method of air-conditioning system according to claim 1 and 2 is it is characterised in that controlling described room
After outer machine is shut down, also judge described air-conditioning system in the 4th Preset Time carry out liquid impact prevention protection number of times whether exceed default
Secondary, wherein,
If described air-conditioning system carries out the number of times of liquid impact prevention protection and exceedes default time in described 4th Preset Time, control institute
State off-premises station irrecoverable start in the case of non-power-off；
If in described 4th Preset Time, described air-conditioning system carries out the number of times of liquid impact prevention protection not less than default time, to institute
State timer to be zeroed out, and control described off-premises station to restart after the 5th Preset Time.
4. the liquid impact prevention control method of the air-conditioning system according to any one of claim 1-3 is it is characterised in that described reality
When obtain compressor discharge superheat, including：
Detect the exhaust port pressure of described compressor, and detect the exhaust port temperatures of described compressor；
Calculate the discharge superheat of described compressor according to described exhaust port pressure and described exhaust port temperatures.
5. the liquid impact prevention control method of air-conditioning system according to claim 3 is it is characterised in that described first Preset Time
For 20 minutes, described second Preset Time was 30 minutes, and the 3rd Preset Time is 5 minutes, and described 4th Preset Time is 120 points
Clock, described 5th Preset Time is 6 minutes.
6. a kind of liquid impact prevention control device of air-conditioning system is it is characterised in that include：
Acquisition module, for the real-time discharge superheat obtaining compressor；
Monitoring modular, for being monitored to described discharge superheat in described air-conditioning system running；
Control module, for controlling timer when described discharge superheat is less than the first preset value and continues the first Preset Time
Start timing, and control when the timing time of described timer reaches the second Preset Time the off-premises station of described air-conditioning system to stop
There is liquid hammer to prevent described compressor in machine.
7. the liquid impact prevention control device of air-conditioning system according to claim 6 is it is characterised in that carry out in described timer
During timing, if described discharge superheat is more than or equal to described first preset value and continues the 3rd Preset Time, described
Control module is then zeroed out to described timer, and continues to judge whether described discharge superheat meets timer and start timing
Condition.
8. the liquid impact prevention control device of the air-conditioning system according to claim 6 or 7 is it is characterised in that controlling described room
After outer machine is shut down, described control module also judges that described air-conditioning system in the 4th Preset Time carries out the number of times of liquid impact prevention protection
Whether exceed default secondary, wherein,
If in described 4th Preset Time, described air-conditioning system carries out the number of times of liquid impact prevention protection and exceedes default time, described control
Module then controls the irrecoverable start in the case of non-power-off of described off-premises station；
If in described 4th Preset Time, described air-conditioning system carries out the number of times of liquid impact prevention protection not less than default time, described control
Molding block is then zeroed out to described timer, and controls described off-premises station to restart after the 5th Preset Time.
9. the liquid impact prevention control device of the air-conditioning system according to any one of claim 6-8 is it is characterised in that also include
It is arranged on temperature sensor and the pressure sensor of the exhaust outlet of described compressor, described temperature sensor is used for detecting described pressure
The exhaust port temperatures of contracting machine, described pressure sensor is used for detecting the exhaust port pressure of described compressor, and described acquisition module is used
In the discharge superheat calculating described compressor according to described exhaust port pressure and described exhaust port temperatures.
10. air-conditioning system according to claim 8 liquid impact prevention control device it is characterised in that described first default when
Between be 20 minutes, described second Preset Time be 30 minutes, the 3rd Preset Time be 5 minutes, described 4th Preset Time be 120
Minute, described 5th Preset Time is 6 minutes.
A kind of 11. air-conditioning systems are it is characterised in that include the anti-of the air-conditioning system according to any one of claim 6-10
Liquid hammer control device.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027983.3A CN106403429B (en) | 2016-11-17 | 2016-11-17 | The liquid impact prevention control method and control device and air-conditioning system of 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 |
| 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 |
| 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)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027983.3A CN106403429B (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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| CN201611027983.3A Active CN106403429B (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 |
| CN108317073A (en) * | 2018-01-12 | 2018-07-24 | 特灵空调系统(中国)有限公司 | The control method and its control device of compressor, compressor |
| CN111412134A (en) * | 2019-01-07 | 2020-07-14 | 青岛海尔特种电冰柜有限公司 | Detection system, detection method and compressor |
| CN111435030A (en) * | 2019-01-11 | 2020-07-21 | 日立江森自控空调有限公司 | Air conditioner control method and air conditioner system |
| CN113654178A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调电子有限公司 | Air conditioner compressor starting method |
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| CN113654178A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调电子有限公司 | Air conditioner compressor starting method |
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|---|---|
| CN106403429B (en) | 2019-04-02 |
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