CN109682021A - A kind of outdoor unit guard method and device, air-conditioning system - Google Patents
A kind of outdoor unit guard method and device, air-conditioning system Download PDFInfo
- Publication number
- CN109682021A CN109682021A CN201811527352.7A CN201811527352A CN109682021A CN 109682021 A CN109682021 A CN 109682021A CN 201811527352 A CN201811527352 A CN 201811527352A CN 109682021 A CN109682021 A CN 109682021A
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- Prior art keywords
- outdoor unit
- stop working
- max
- contained
- expansion valve
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention discloses a kind of outdoor unit guard method and device, air-conditioning system; it is related to air-conditioning technical field; when an outdoor unit stops working wherein, while guaranteeing that other outdoor units work normally, prevent in the outdoor unit to stop working in starting next time by liquid hammer.The outdoor unit guard method includes: to judge the working condition of outdoor unit；If outdoor unit is in work in combination state, judge in outdoor unit with the presence or absence of the outdoor unit in stop working state；If there is the outdoor unit for being in stop working state in outdoor unit, the aperture K > 0 of the expansion valve contained by the outdoor unit to stop working is controlled.The outdoor unit protective device applies above-mentioned outdoor unit guard method.Outdoor unit guard method provided by the invention and device, air-conditioning system are used for field of air conditioning.
Description
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of outdoor unit guard method and devices, refrigeration system.
Background technique
In the prior art, central air-conditioning has usually on the buildings such as school, company or hotel and is widely applied,
Including being mounted on indoor more indoor units and being mounted on outdoor outdoor unit, and outdoor unit is by be connected in parallel more
Outdoor unit is constituted.
Every outdoor unit includes compressor and check valve and expansion valve positioned at compressor air-discharging side, check valve and expansion
Bypass circulation is equipped between valve, the bypass circulation is to control whether the exhaust side of compressor is connected to suction side.When wherein one
When platform outdoor unit stops working, in the pipeline between check valve and expansion valve, and with the variation of outdoor operating condition, that is gathered is cold
Pipeline condensation of the matchmaker between check valve and expansion valve, so that the loine pressure between check valve and expansion valve increases, and then leads
The pressure at expulsion of compressor is caused to increase.When the pressure at expulsion of compressor reaches exhaust threshold value, outdoor unit protective device will be sent out
Compressor emergency shutdown instructs out, is shut down with controlling all outdoor units included by outdoor unit, to guarantee outdoor unit safety, but this
So that central air-conditioning is completely out of service.For this purpose, when wherein an outdoor unit stops working, the outdoor unit that can will stop working
Included bypass circulation SVA is opened, so that the refrigerant gathered between check valve and expansion valve can be returned by bypass circulation SVA
To the entrance of compressor, cause compressor next time when being switched on by liquid hammer.
Summary of the invention
The purpose of the present invention is to provide a kind of outdoor unit guard method and devices, refrigeration system, with one wherein
When outdoor unit stops working, while guaranteeing that other outdoor units work normally, prevent in the outdoor unit to stop working in next time
Starting is by liquid hammer.
To achieve the goals above, the present invention provides a kind of outdoor unit guard method, which includes:
Judge the working condition of outdoor unit；
If outdoor unit is in work in combination state, judge in outdoor unit with the presence or absence of the room in stop working state
Outer machine；
If there is the outdoor unit for being in stop working state in outdoor unit, control contained by the outdoor unit to stop working
The aperture K > 0 of expansion valve, so that the pressure at expulsion P < P of compressor included by the outdoor unit to stop workingmax, PmaxFor compression
The pressure at expulsion threshold value of machine.
Compared with prior art, it in outdoor unit guard method provided by the invention, is in if existed in outdoor unit
The outdoor unit of stop working state controls the aperture K > 0 of the expansion valve contained by the outdoor unit to stop working, so that being condensate in
Between check valve and expansion valve the refrigerant of pipeline can enter entire air-conditioning system pipeline in, this makes it possible to reduce check valve with
Loine pressure between expansion valve, so that the pressure at expulsion P of compressor included by the outdoor unit to stop working is less than exhaust pressure
Force threshold Pmax.And the pressure at expulsion P for working as compressor included by the outdoor unit to stop working is less than pressure at expulsion threshold value PmaxWhen,
The outdoor unit that outdoor unit protective device will not be in normal operating conditions into outdoor unit issues halt instruction, works as room in this way
When one of outdoor unit is stopped working due to failure and other reasons in outer unit, the room when outdoor unit is in work in combination state
The outdoor unit that normal operating conditions is in outer unit can work normally.Moreover, outdoor unit guard method provided by the invention
In, the refrigerant condensed in pipeline between check valve and expansion valve is sent to the air-breathing of compressor without using bypass circulation SVA
Side also avoids the outdoor unit to stop working in starting next time by liquid hammer in this way.
The present invention also provides a kind of outdoor unit protective device, which includes:
First judgment module, for judging the working condition of outdoor unit；
Second judgment module, for, in work in combination state, judging to whether there is in outdoor unit at outdoor unit
Outdoor unit in stop working state；
Valve control module, when there is the outdoor unit in stop working state in outdoor unit, control stops working
Outdoor unit contained by expansion valve aperture K > 0 so that the pressure at expulsion of compressor included by the outdoor unit to stop working
P < Pmax, PmaxFor pressure at expulsion threshold value.
Compared with prior art, the beneficial effect of outdoor unit protective device provided by the invention and above-mentioned outdoor unit are protected
The beneficial effect of maintaining method is identical, and this will not be repeated here.
The present invention also provides a kind of computer storage mediums, for storing one or more computer instructions, the meter
Calculation machine software instruction includes for executing computer program designed by above-mentioned outdoor unit guard method.
The present invention also provides a kind of air-conditioning system, which includes the protection of outdoor unit described in above-mentioned technical proposal
Device.
Compared with prior art, the beneficial effect of air-conditioning system provided by the invention and above-mentioned outdoor unit guard method
Beneficial effect is identical, and this will not be repeated here.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of air-conditioning system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of outdoor unit provided in an embodiment of the present invention；
Fig. 3 is the flow chart one of outdoor unit guard method provided in an embodiment of the present invention；
Fig. 4 is the flowchart 2 of outdoor unit guard method provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of outdoor unit protective device provided in an embodiment of the present invention；
Fig. 6 is the architecture diagram of outdoor unit protective device provided in an embodiment of the present invention.
Appended drawing reference:
100- indoor units, 110- indoor unit；
200- outdoor unit, 210- outdoor unit；
210A- compressor, 210B- heat exchanger；
The first outdoor unit of 211-, the second outdoor unit of 212-；
213- third outdoor unit, the outer machine of 214- fourth ventricle；
300- outdoor unit protective device, 310- first judgment module；
The second judgment module of 320-, 330- third judgment module；
The 4th judgment module of 340-, 350- first state confirmation module；
360- the second state confirmation module, 370- valve control module；
410- entrance branch pipe, 420- export branch pipe；
500- outdoor unit protects terminal, 510- memory；
520- processor, 530- transceiver；
540- bus, EVO- expansion valve；
FV- four-way valve, SVA- bypass circulation；
VD- check valve.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of air-conditioning system, including indoor units 100, outdoor unit 200
And the outdoor unit protective device 300 for protecting outdoor unit 200.The outdoor unit protective device 300 can wherein one
When platform outdoor unit 210 stops working, while guaranteeing that other outdoor units 210 work normally, prevent in the outdoor to stop working
Machine 210 is in starting next time by liquid hammer.
Illustratively, as depicted in figs. 1 and 2, indoor units 100 include 8 indoor units 110, and outdoor unit 200 includes 4
210,4 outdoor units 210 of platform outdoor unit are respectively the first outdoor unit 211, the second outdoor unit 212, third outdoor unit 213 and the 4th
Outdoor unit 214.Every outdoor unit 210 mainly includes compressor 210A and heat exchanger 210B, in addition to this further include check valve VD,
The entrance of the exhaust side of four-way valve FV and the expansion valve EVO being located on heat exchanger 210B, compressor 210A and check valve VD connect
It connects, the outlet of check valve VD is connect with the first interface of four-way valve FV, and the second interface of four-way valve FV passes through entrance branch pipe 410
It is connect with the entrance of each outdoor unit 210 in outdoor unit 200, the outlet point of each outdoor unit 210 in outdoor unit 200
The first heat exchange interface of manifold 420 and heat exchanger 210B connects, and the of the second heat exchange interface of heat exchanger 210B and four-way valve FV
The connection of three interfaces, the 4th interface of four-way valve FV are connected to the heat absorbing side of compressor 210A；Meanwhile the outlet of check valve VD and four
Pipeline between the first interface of port valve FV is connected to by bypass circulation SVA with the heat absorbing side of compressor 210A, bypass circulation SVA
The heat absorbing side of the pipeline and compressor 210A between the outlet of check valve VD and the first interface of four-way valve FV can be connected, and is bypassed
Circuit SVA is equipped with bypath valve, opens or closes to control bypass circulation SVA.Wherein, solid arrow meaning side in Fig. 1
To being that traffic direction of the refrigerant in air-conditioning system pipeline, dotted arrow direction refer to when refrigerant is passed through indoor units 100
Traffic direction of the refrigerant in air-conditioning system pipeline when refrigerant is flowed out from indoor units 100.
In conjunction with Fig. 1 and Fig. 2 it can be seen that when any one outdoor unit 210 stops working in 4 outdoor units 210, stop
Compressor 210A included by the outdoor unit 210 of work and expansion valve EVO are automatically closed, and lead to check valve VD and expansion valve
Gaseous coolant (high temperature and pressure) accumulation in pipeline between EVO, with the reduction of outdoor temperature, check valve VD and expansion valve
The gaseous coolant in pipeline between EVO is gradually condensed into liquid refrigerants, and the pressure at expulsion of compressor 210A is caused to increase.
In order to clearly illustrate the above-mentioned outdoor unit protective device 300 of the present invention and method, it is described in detail with reference to the accompanying drawing.
As shown in FIG. 1 to 3, the embodiment of the invention provides a kind of outdoor unit guard method, outdoor unit protections
Method includes:
Step S100: judge the working condition of outdoor unit 200；
If outdoor unit 200 is in work in combination state, step S200 is executed.
If outdoor unit 200 is in autonomous working state, illustrating will not between each outdoor unit 210 in outdoor unit 200
It influences each other, i.e., one of outdoor unit 210 stops working, and will not influence the work of other outdoor units 210, in this case
It is protected without carrying out outdoor unit 200, process can be terminated.
Step S200: judge in outdoor unit 200 with the presence or absence of the outdoor unit 210 in stop working state；
If there is the outdoor unit 210 for being in stop working state in outdoor unit 200, step S400 is executed.
If illustrating each in outdoor unit 200 there is no the outdoor unit 210 in stop working state in outdoor unit 200
A outdoor unit 210 works normally, and in this case without carrying out the protection of outdoor unit 200, can terminate process.
Step S400: controlling the aperture K > 0 of the expansion valve EVO contained by the outdoor unit 210 to stop working, so that stopping
The pressure at expulsion P < P of compressor 210A included by the outdoor unit 210 of workmax, PmaxFor the pressure at expulsion threshold of compressor 210A
Value.
Based on above-mentioned outdoor unit guard method it is found that if existing in outdoor unit 200 in stop working state
Outdoor unit 210 controls the aperture > 0 of the expansion valve EVO contained by the outdoor unit 210 to stop working, so that being condensate in check valve
The refrigerant of pipeline can enter in the pipeline of entire air-conditioning system between VD and expansion valve EVO, and this makes it possible to reduce check valve VD
With the loine pressure between expansion valve EVO so that the pressure at expulsion of compressor 210A included by the outdoor unit 210 to stop working
P is less than pressure at expulsion threshold value Pmax.And the pressure at expulsion P for working as compressor 210A included by the outdoor unit 210 to stop working is less than
Pressure at expulsion threshold value PmaxWhen, outdoor unit protective device 300 will not be in the room of normal operating conditions into outdoor unit 200
Outer machine 210 issues halt instruction, in this way when outdoor unit 210 one of in outdoor unit 200 since failure and other reasons stop work
When making, the outdoor unit 210 of normal operating conditions is in outdoor unit 200 when outdoor unit 200 is in work in combination state
It can work normally.Moreover, in above-mentioned outdoor unit guard method, without using bypass circulation SVA by check valve VD and expansion valve
The refrigerant condensed in pipeline between EVO is sent to the suction side of compressor, also avoids the outdoor unit 210 to stop working in this way
In starting next time by liquid hammer.
In some embodiments, as shown in FIG. 1 to 3, it is contemplated that outdoor unit 210 is when stopping working, the outdoor unit 210
Included compressor 210A stops working, at this time compressor operating frequency Ft=0.Based on this, above-mentioned judgement outdoor unit 200
It is interior to include: with the presence or absence of the outdoor unit in stop working state
Step S200: judge the compressor operating frequency Ft that each outdoor unit 210 contained in outdoor unit 200 includes
Whether 0 is equal to；
If the compressor operating frequency Ft that at least one contained outdoor unit 210 includes in outdoor unit 200 is equal to 0,
Execute step S210.
If the compressor operating frequency Ft that contained each outdoor unit includes in outdoor unit is all larger than 0, step is executed
S220。
Step S210: it determines in outdoor unit 200 and exists in the outdoor unit 210 to stop working, and according to compressor work
Working frequency Ft determines the outdoor unit 210 to stop working in outdoor unit 200.
Step S220: determine that each outdoor unit 210 in outdoor unit 200 is in running order.
Optionally, as shown in FIG. 1 to 3, it in order to which more accurate control outdoor unit 200 is protected, reduces unnecessary
The protection operation of outdoor unit 200 stops working if existing in outdoor unit 200 in the outdoor unit 210 to stop working in control
Outdoor unit 210 contained by expansion valve EVO aperture K > 0 before, above-mentioned outdoor unit guard method further include:
Step S300: judge whether the pressure at expulsion P of compressor 210A included by the outdoor unit 210 to stop working is greater than
Equal to Pmax；
If P < PmaxAlthough illustrating that the outdoor unit 210 is in stop working state, 210 internal check valve of outdoor unit
Loine pressure between VD and expansion valve EVO still can guarantee that the pressure at expulsion P of 210 inner compressor 210A of the outdoor unit is in
In safe range, step S310 is executed at this time,
If P >=PmaxAlthough illustrating that the outdoor unit 210 is in stop working state, 210 internal check valve of outdoor unit
Loine pressure between VD and expansion valve EVO has made the pressure at expulsion P of 210 inner compressor 210A of the outdoor unit exceeded, should
There are security risks for outdoor unit 210, execute step S320 at this time.
Step S310: determine that the outdoor unit 210 to stop working in outdoor unit 200 is in safe condition, in such case
It is lower to be protected without carrying out outdoor unit 200, process can be terminated.
Step S320: it determines that the outdoor unit 210 to stop working in outdoor unit 200 is in abnormality, and executes step
S400。
By the above process it is found that being not one when existing in outdoor unit 200 in the outdoor unit 210 to stop working
Surely the aperture K of the expansion valve EVO contained by the outdoor unit 210 to stop working is controlled, only determines in outdoor unit 200 and stops
The outdoor unit 210 of work is in opening for the expansion valve EVO contained by the outdoor unit 210 that abnormality just needs control to stop working
K is spent, thus can be reduced unnecessary outdoor unit protection operation.
In some embodiments, as shown in Figure 1, Figure 2 and Figure 4, contained by the outdoor unit 210 that above-mentioned control stops working
The aperture K > 0 of expansion valve EVO, so that the pressure at expulsion P < P of compressor 210A included by the outdoor unit 210 to stop workingmax
Include:
Step S410: the aperture K of the expansion valve EVO contained by the outdoor unit 210 to stop working is controlled.
Step S420: judge whether the pressure at expulsion P of compressor 210A included by the outdoor unit 210 to stop working is equal to
PmaxThe size of-k, k > 0, k can be set according to actual conditions, as k=0.3~0.8 can effectively ensure that stopping as k=0.5
The outdoor unit 210 of work is in safe condition, and in starting next time, the loine pressure of the outdoor unit 210 can be rapidly reached
Balance.
If P=Pmax- k executes step S430.
If P > Pmax- k executes step S440.
Step S430: work as P=Pmax- k illustrates that the outdoor unit 210 to stop working has been in safe condition, only needs at this time
Expansion valve EVO is closed, that is, controls the aperture K=0 of the expansion valve EVO contained by the outdoor unit 210 to stop working, and terminate to flow
Journey.
Step S440: the aperture K variation of the expansion valve EVO contained by the outdoor unit 210 to stop working is controlled.
As shown in FIG. 1 to FIG. 3 and Fig. 5, the embodiment of the invention also provides a kind of outdoor unit protective device 300, the rooms
Outer generator protection device 300 includes:
First judgment module 310, for judging the working condition of outdoor unit 200；
The second judgment module 320 connecting with first judgment module 310 is used at outdoor unit 200 in work in combination
When state, judge in outdoor unit 200 with the presence or absence of the outdoor unit 210 in stop working state；
The valve control module 370 connecting with the second judgment module 320 exists in outdoor unit 200 in stopping work
When making the outdoor unit 210 of state, the aperture K > 0 of the expansion valve EVO contained by the outdoor unit 210 to stop working is controlled, so that stopping
The pressure at expulsion P < P of compressor 210A included by the outdoor unit 210 only to workmax, PmaxFor pressure at expulsion threshold value.
It is understood that valve control module 370 controls the expansion valve EVO contained by the outdoor unit 210 to stop working
Aperture K when, expansion valve EVO contained by the outdoor unit to stop working 210 is electromagnetic expanding valve EVO, to guarantee valve control
Molding can realize the aperture control to expansion valve EVO.
Compared with prior art, the beneficial effect of outdoor unit protective device 300 provided in an embodiment of the present invention with it is above-mentioned
The beneficial effect of outdoor unit guard method is identical, and this will not be repeated here.
In some embodiments, as shown in FIG. 1 to FIG. 3 and Fig. 5, above-mentioned second judgment module 320 is specifically used for judging room
Whether the compressor operating frequency Ft that contained each outdoor unit 210 includes in outer unit 200 is equal to 0；
Above-mentioned outdoor unit protective device 300 further includes first state confirmation module 350, for contained in outdoor unit
When the compressor operating frequency Ft that at least one outdoor unit having includes is equal to 0, determines in outdoor unit 200 and exist in stopping
The outdoor unit 210 of work, and the outdoor unit 210 to stop working in outdoor unit 200 is determined according to compressor operating frequency Ft,
When the compressor operating frequency Ft that contained each outdoor unit includes in outdoor unit is all larger than 0, determine in outdoor unit 200
Each outdoor unit 210 it is in running order.
In some embodiments, as shown in FIG. 1 to FIG. 3 and Fig. 5, above-mentioned outdoor unit protective device 300 further include:
The third judgment module 330 being connect with the second judgment module 320 and valve control module 370, in outdoor unit
When existing in group 200 in the outdoor unit 210 to stop working, in the expansion valve contained by the outdoor unit 210 that control stops working
Before the aperture K > 0 of EVO, judge whether the pressure at expulsion P of compressor 210A included by the outdoor unit 210 to stop working is greater than
Equal to Pmax；Wherein, the pressure at expulsion P of compressor 210A included by the outdoor unit 210 to stop working can utilize pressure sensor
It obtains.
The second state confirmation module 360 being connect with third judgment module 330, in P >=PmaxWhen, determine outdoor unit
The outdoor unit 210 to stop working in group 200 is in abnormality；In P < PmaxWhen, it determines and stops working in outdoor unit 200
Outdoor unit 210 is in safe condition；
Above-mentioned valve control module 370 is specifically used in P >=PmaxWhen, it controls contained by the outdoor unit 210 to stop working
The aperture K > 0 of expansion valve EVO.
In some embodiments, shown in as shown in Figure 1, Figure 2, Fig. 4 and Fig. 5, above-mentioned valve control module 370 is specifically used for control
The aperture K of the expansion valve EVO contained by outdoor unit 210 to stop working；
Above-mentioned outdoor unit protective device 300 further includes the 4th judgment module 340, the outdoor unit for judging to stop working
Whether the pressure at expulsion P of compressor 210A included by 210 is equal to Pmax- k, k > 0, optionally, k=0.3~0.8.
Above-mentioned valve control module 370 is also used in P=PmaxWhen-k, control contained by the outdoor unit 210 to stop working
The aperture K=0 of expansion valve EVO；In P > PmaxWhen-k, opening for the expansion valve EVO contained by the outdoor unit 210 to stop working is controlled
Spend K variation.
The embodiment of the invention also provides a kind of air-conditioning system, which includes above-mentioned outdoor unit protective device
300。
As shown in Figure 1, compared with prior art, the beneficial effect of air-conditioning system provided in an embodiment of the present invention and above-mentioned room
The beneficial effect of outer generator protection method is identical, and this will not be repeated here.
The embodiment of the invention also provides a kind of computer storage mediums, for storing one or more computer instructions,
The computer software instructions include for executing computer program designed by above-mentioned outdoor unit guard method.
Compared with prior art, the beneficial effect of computer storage medium provided in an embodiment of the present invention and above-mentioned outdoor unit
The beneficial effect of group guard method is identical, and this will not be repeated here.
As shown in fig. 6, the embodiment of the invention also provides a kind of outdoor unit protection terminal 500, including processor 520,
Transceiver 530, memory 510 and bus 540, processor 520, transceiver 530 and memory 510 are led to each other by bus 540
Letter.Wherein,
Memory 510 realizes above-mentioned outdoor unit guard method for storing multiple instruction, and processor 520 executes described
Multiple instruction is to realize above-mentioned outdoor unit guard method.
Wherein, processor 520 described in the embodiment of the present invention can be a processor, be also possible to multiple processing elements
General designation.For example, the processor 520 can be central processing unit (Central Processing Unit, abbreviation CPU), it can also
To be specific integrated circuit (Application Specific Integrated Circuit, abbreviation ASIC), or matched
The one or more integrated circuits for implementing the embodiment of the present invention are set to, such as: one or more microprocessors (digital
Signal processor, abbreviation DSP), or, one or more field programmable gate array (Field Programmable
Gate Array, abbreviation FPGA).
Memory 510 can be a storage device, be also possible to the general designation of multiple memory elements, and for storing and can hold
Line program code etc..And memory 510 may include random access memory (RAM), also may include nonvolatile memory (non-
Volatile memory), for example, magnetic disk storage, flash memory (Flash) etc..
It is total that bus 540 can be industry standard architecture (Industry Standard Architecture, ISA)
Line, external equipment interconnection (Peripheral Component, PCI) bus or extended industry-standard architecture (Extended
Industry Standard Architecture, EISA) bus etc..It is total that the bus 540 can be divided into address bus, data
Line, control bus etc..Only to be indicated with a thick line in Fig. 6, it is not intended that an only bus or a type convenient for indicating
The bus of type.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for equipment reality
For applying example, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to embodiment of the method
Part explanation.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (12)
1. a kind of outdoor unit guard method characterized by comprising
Judge the working condition of outdoor unit；
If outdoor unit is in work in combination state, judge in outdoor unit with the presence or absence of the outdoor in stop working state
Machine；
If there is the outdoor unit for being in stop working state in outdoor unit, the expansion contained by the outdoor unit to stop working is controlled
The aperture K > 0 of valve, so that the pressure at expulsion P < P of compressor included by the outdoor unit to stop workingmax, PmaxFor compressor
Pressure at expulsion threshold value.
2. outdoor unit guard method according to claim 1, which is characterized in that described to judge whether deposit in outdoor unit
Include: in the outdoor unit in stop working state
Whether the compressor operating frequency Ft for judging that each outdoor unit contained in outdoor unit includes is equal to 0；
If the compressor operating frequency Ft that at least one contained outdoor unit includes in outdoor unit is equal to 0, the room is determined
Exist in outer unit in the outdoor unit to stop working, and is determined in outdoor unit and stopped working according to compressor operating frequency Ft
Outdoor unit；
If the compressor operating frequency Ft that contained each outdoor unit includes in outdoor unit is all larger than 0, the outdoor is determined
Each outdoor unit in unit is in running order.
3. outdoor unit guard method according to claim 1, which is characterized in that be in if existing in the outdoor unit
The outdoor unit to stop working, before the aperture K > 0 of the expansion valve contained by the outdoor unit that control stops working, the outdoor unit
Group guard method further include:
Whether the pressure at expulsion P of compressor included by the outdoor unit to stop working described in judgement is more than or equal to Pmax；
If P >=Pmax, determine that the outdoor unit to stop working in the outdoor unit is in abnormality, execute control and stop working
Outdoor unit contained by expansion valve aperture K > 0；
If P < Pmax, determine that the outdoor unit to stop working in the outdoor unit is in safe condition.
4. outdoor unit guard method according to claim 1, which is characterized in that described to control the outdoor unit to stop working
Contained expansion valve opening K > 0, so that the pressure at expulsion P < P of compressor included by the outdoor unit to stop workingmaxPacket
It includes:
Control the aperture K of the expansion valve contained by the outdoor unit to stop working；
Judge whether the pressure at expulsion P of compressor included by the outdoor unit to stop working is equal to Pmax- k, k > 0；
If P=Pmax- k controls the aperture K=0 of the expansion valve contained by the outdoor unit to stop working；
If P > Pmax- k controls the aperture K variation of the expansion valve contained by the outdoor unit to stop working.
5. outdoor unit guard method according to claim 4, which is characterized in that k=0.3~0.8.
6. a kind of outdoor unit protective device characterized by comprising
First judgment module, for judging the working condition of outdoor unit；
Second judgment module is in for, in work in combination state, judging to whether there is in outdoor unit at outdoor unit
The outdoor unit of stop working state；
Valve control module controls the room to stop working when there is the outdoor unit in stop working state in outdoor unit
The aperture K > 0 of expansion valve contained by outer machine, so that the pressure at expulsion P < of compressor included by the outdoor unit to stop working
Pmax, PmaxFor pressure at expulsion threshold value.
7. outdoor unit protective device according to claim 6, which is characterized in that second judgment module is specifically used for
Whether the compressor operating frequency Ft for judging that each outdoor unit contained in outdoor unit includes is equal to 0；
The outdoor unit protective device further includes first state confirmation module, in outdoor unit contained at least one
When the compressor operating frequency Ft that a outdoor unit includes is equal to 0, determines in the outdoor unit and exist in the room to stop working
Outer machine, and the outdoor unit to stop working in outdoor unit is determined according to compressor operating frequency Ft, it is contained in outdoor unit
Each outdoor unit compressor operating frequency Ft for including when being all larger than 0, determine at each outdoor unit in the outdoor unit
In working condition.
8. outdoor unit protective device according to claim 6, which is characterized in that the outdoor unit protective device is also wrapped
It includes:
Third judgment module when for existing in the outdoor unit in the outdoor unit to stop working, stops work in control
Before the aperture K > 0 of expansion valve contained by the outdoor unit of work, compressor included by the outdoor unit that stops working described in judgement
Whether pressure at expulsion P is more than or equal to Pmax；
Second state confirmation module, in P >=PmaxWhen, it is different to determine that the outdoor unit to stop working in the outdoor unit is in
Normal state；In P < PmaxWhen, determine that the outdoor unit to stop working in the outdoor unit is in safe condition；
The valve control module is specifically used in P >=PmaxWhen, control opening for the expansion valve contained by the outdoor unit to stop working
Spend K > 0.
9. outdoor unit protective device according to claim 6, which is characterized in that
The valve control module is specifically used for the aperture K of the expansion valve contained by the outdoor unit that control stops working；
The outdoor unit protective device further includes the 4th judgment module, pressure included by the outdoor unit for judging to stop working
Whether the pressure at expulsion P of contracting machine is equal to Pmax- k, k > 0；
The valve control module is also used in P=PmaxWhen-k, opening for the expansion valve contained by the outdoor unit to stop working is controlled
Spend K=0；In P > PmaxWhen-k, the aperture K variation of the expansion valve contained by the outdoor unit to stop working is controlled.
10. outdoor unit protective device according to claim 6, which is characterized in that k=0.3~0.8.
11. a kind of computer storage medium, which is characterized in that for storing one or more computer instructions, the computer
Software instruction includes to require computer program designed by any one of 1~5 outdoor unit guard method for perform claim.
12. a kind of air-conditioning system, which is characterized in that including the described in any item outdoor unit protective devices of claim 6~10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527352.7A CN109682021B (en) | 2018-12-13 | 2018-12-13 | Outdoor unit protection method and device and air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527352.7A CN109682021B (en) | 2018-12-13 | 2018-12-13 | Outdoor unit protection method and device and air conditioning system |
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| CN109682021A true CN109682021A (en) | 2019-04-26 |
| CN109682021B CN109682021B (en) | 2021-05-14 |
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| CN201811527352.7A Active CN109682021B (en) | 2018-12-13 | 2018-12-13 | Outdoor unit protection method and device and air conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426009A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Control method of air conditioning system, air conditioning system and computer storage medium |
| CN114674063A (en) * | 2022-04-22 | 2022-06-28 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner system |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6138175A (en) * | 1984-07-31 | 1986-02-24 | Toyoda Autom Loom Works Ltd | Multi-cylinder variable capacity type refrigerant compressor |
| US4944216A (en) * | 1989-11-13 | 1990-07-31 | Mccutchen Wilmot R | Building emergency exhaust fan system |
| CN2090499U (en) * | 1990-10-13 | 1991-12-11 | 袁昌礼 | Energy-saving refrigerant check valve |
| JP2004198088A (en) * | 2002-12-20 | 2004-07-15 | Calsonic Compressor Seizo Kk | Gas heat pump system |
| JP2005248862A (en) * | 2004-03-04 | 2005-09-15 | Calsonic Compressor Inc | Gas compressor and air conditioner for vehicle |
| US20080092572A1 (en) * | 2006-10-19 | 2008-04-24 | Ju Sang Kim | Simultaneous cooling-heating multiple type air conditioner |
| JP2011242073A (en) * | 2010-05-19 | 2011-12-01 | Mitsubishi Electric Corp | Refrigeration apparatus |
| CN102563789A (en) * | 2012-02-01 | 2012-07-11 | 美的集团有限公司 | Multi-split heat pump air conditioning system and control method thereof |
| CN103600748A (en) * | 2013-11-21 | 2014-02-26 | 石家庄国祥运输设备有限公司 | Air-conditioning unit |
| CN104634028A (en) * | 2013-11-11 | 2015-05-20 | 珠海格力电器股份有限公司 | Air conditioning system for reducing exhaust pressure of compressors and method thereof |
| CN104729023A (en) * | 2015-04-09 | 2015-06-24 | 宁波奥克斯电气有限公司 | Dynamic refrigerant balance control method used in heating process of multi-connected air-conditioner unit |
| EP2891850A1 (en) * | 2014-01-07 | 2015-07-08 | Mitsubishi Electric Corporation | Air conditioner |
| CN105157171A (en) * | 2015-08-28 | 2015-12-16 | 珠海格力电器股份有限公司 | Control method and control system of air conditioning system |
| CN105650819A (en) * | 2016-02-01 | 2016-06-08 | 青岛海尔空调电子有限公司 | Control method for high temperature refrigeration of multi-split air conditioner |
| CN105890118A (en) * | 2016-04-29 | 2016-08-24 | 宁波奥克斯电气股份有限公司 | Method for improving heating effect of multi-connected machine indoor machines and unit thereof |
| CN108758975A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of air-conditioning system |
-
2018
- 2018-12-13 CN CN201811527352.7A patent/CN109682021B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6138175A (en) * | 1984-07-31 | 1986-02-24 | Toyoda Autom Loom Works Ltd | Multi-cylinder variable capacity type refrigerant compressor |
| US4944216A (en) * | 1989-11-13 | 1990-07-31 | Mccutchen Wilmot R | Building emergency exhaust fan system |
| CN2090499U (en) * | 1990-10-13 | 1991-12-11 | 袁昌礼 | Energy-saving refrigerant check valve |
| JP2004198088A (en) * | 2002-12-20 | 2004-07-15 | Calsonic Compressor Seizo Kk | Gas heat pump system |
| JP2005248862A (en) * | 2004-03-04 | 2005-09-15 | Calsonic Compressor Inc | Gas compressor and air conditioner for vehicle |
| US20080092572A1 (en) * | 2006-10-19 | 2008-04-24 | Ju Sang Kim | Simultaneous cooling-heating multiple type air conditioner |
| JP2011242073A (en) * | 2010-05-19 | 2011-12-01 | Mitsubishi Electric Corp | Refrigeration apparatus |
| CN102563789A (en) * | 2012-02-01 | 2012-07-11 | 美的集团有限公司 | Multi-split heat pump air conditioning system and control method thereof |
| CN104634028A (en) * | 2013-11-11 | 2015-05-20 | 珠海格力电器股份有限公司 | Air conditioning system for reducing exhaust pressure of compressors and method thereof |
| CN103600748A (en) * | 2013-11-21 | 2014-02-26 | 石家庄国祥运输设备有限公司 | Air-conditioning unit |
| EP2891850A1 (en) * | 2014-01-07 | 2015-07-08 | Mitsubishi Electric Corporation | Air conditioner |
| CN104729023A (en) * | 2015-04-09 | 2015-06-24 | 宁波奥克斯电气有限公司 | Dynamic refrigerant balance control method used in heating process of multi-connected air-conditioner unit |
| CN105157171A (en) * | 2015-08-28 | 2015-12-16 | 珠海格力电器股份有限公司 | Control method and control system of air conditioning system |
| CN105650819A (en) * | 2016-02-01 | 2016-06-08 | 青岛海尔空调电子有限公司 | Control method for high temperature refrigeration of multi-split air conditioner |
| CN105890118A (en) * | 2016-04-29 | 2016-08-24 | 宁波奥克斯电气股份有限公司 | Method for improving heating effect of multi-connected machine indoor machines and unit thereof |
| CN108758975A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of air-conditioning system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426009A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Control method of air conditioning system, air conditioning system and computer storage medium |
| CN111426009B (en) * | 2020-04-03 | 2021-06-18 | 广东美的暖通设备有限公司 | Control method of air conditioning system, air conditioning system and computer storage medium |
| CN114674063A (en) * | 2022-04-22 | 2022-06-28 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner system |
| CN114674063B (en) * | 2022-04-22 | 2023-10-20 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner system |
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|---|---|
| CN109682021B (en) | 2021-05-14 |
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