CN104792076A - Three-tube multi-split air-conditioning system oil return or defrosting control method and system thereof - Google Patents
Three-tube multi-split air-conditioning system oil return or defrosting control method and system thereof Download PDFInfo
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- CN104792076A CN104792076A CN201510209772.0A CN201510209772A CN104792076A CN 104792076 A CN104792076 A CN 104792076A CN 201510209772 A CN201510209772 A CN 201510209772A CN 104792076 A CN104792076 A CN 104792076A
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
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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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a three-tube multi-split air-conditioning system oil return or defrosting control method and a system thereof. The method includes the following steps that step1, a port of refrigerating/heating switching device and an output pipe of an air-conditioning external unit system through a bypass pipe, the bypass pipe is provided with a bypass electromagnetic valve, and whether an air-conditioning system enters the oil return or defrosting state or not is detected in real time; step 2, when the air-conditioning system enters the oil return or defrosting state, an air-conditioning heat recycling device is switched into the refrigerating mode; step 3, an electromagnetic expansion valve of a throttling part of the air-conditioning heat recycling device is turned off, and the bypass electromagnetic valve is turned on; step 4, after the air-conditioning system receives the ending signal of oil return or defrosting, the bypass electromagnetic valve is turned off, and the electromagnetic expansion valve of the throttling part of the air-conditioning recycling device is turned on. According to the three-tube multi-split air-conditioning system oil return or defrosting control method and the system thereof, coolants do not pass through a hydraulic module system, and the situations that the hydraulic module system is frozen due to the coolants, and thus pipes are blocked are avoided on the premise of meeting the oil return and defrosting requirements.
Description
Technical field
The present invention relates to air conditioner technical field, particularly relate to a kind of three control multi-online air-conditioning system oil returns or defrosting control method and system thereof.
Background technology
Current, in order to improve air-conditioning comfort, at transition season, the different demands freezed and heat may be there are, for single cover multi-online air-conditioning system, just must can meet refrigeration, heating needs, in prior art simultaneously, three control multi-online air-conditioning systems can meet this demand, and the indoor function of multiple stage is opened refrigeration simultaneously or heated two kinds of different patterns.
Under air-conditioning heating pattern, frosting is inevitable, and the way of Most current producer is all once enter defrost, and interior machine switches to refrigeration mode, and in order to reduce defrosting time, the electric expansion valve of interior machine can be opened to reduce defrosting time.For multiple on-line system, particularly along with multiple on-line system pipe arrangement is installed more and more longer, it is also necessary that oil return runs, and when system cloud gray model a period of time, just must perform oil return running, guarantee that outer machine got back to by the oil in system from pipe arrangement.When oil return runs, the electric expansion valve of the interior machine do not opened also must be opened.Such refrigerant will flow through interior machine, make interior coiler temperature very low, for the multiple on-line system of band recuperation of heat, if adopt water circulation system, when oil return or defrost, refrigerant is through heat reclamation device, heat will be absorbed from water, and cause leaving water temperature to reduce, when low temperature, even may cause the water freezing in heat reclamation device, affect user's comfort and system reliability.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of three control multi-online air-conditioning system oil returns or defrosting control method and system thereof, prevent the temperature when oil return or defrost of the water in the water heat exchanger of heat reclamation device from reducing even icing, affect user's comfort and system operation reliability.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of three oil return of control multi-online air-conditioning system or defrosting control methods, comprise the following steps:
Step one, connects the port of cooling and warming switching device shifter and the output channel of outdoor machine of air-conditioner system by by-pass line, and arrange bypass solenoid valve on by-pass line, detects air-conditioning system in real time and whether enters oil return or defrost state;
Step 2, when air-conditioning system enters oil return or defrost, switches to refrigeration mode by recovering apparatus for heat of air-conditioner;
Step 3, closes the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part, opens bypass solenoid valve;
Step 4, receive after the signal that oil return or defrost terminate until air-conditioning system, close bypass solenoid valve, heat reclamation device switches to the pattern before oil return or defrost, and the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part is opened.
The invention has the beneficial effects as follows: the port being connected cooling and warming switching device shifter by by-pass line is communicated with the output channel of outdoor machine of air-conditioner system, and bypass solenoid valve is set on by-pass line, when air-conditioning system enters oil return or defrost state, close the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part, open bypass solenoid valve, refrigerant is without hydraulic module system, under the prerequisite meeting oil return and defrost requirement, avoid refrigerant and cause freezing of hydraulic module system, blocking pipeline, thus the impact avoided user's comfort and system operation reliability.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in described step 3, before the electric expansion valve of closing described recovering apparatus for heat of air-conditioner throttle part, the aperture of air-conditioning system to the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part is preserved.
Further, in described step 4, after the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part is opened, recover the aperture before oil return or defrost.
The beneficial effect of above-mentioned further scheme is adopted to be: to carry out the aperture of the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part preserving the aperture that can ensure before the recovery of electric expansion valve after oil return or defrost.Make the aperture situation that electric expansion valve can be satisfied the demand.
A kind of three control multi-online air-conditioning systems, comprise outer machine system, first cooling and warming switching device shifter, second cooling and warming switching device shifter, indoor apparatus of air conditioner system, hydraulic module system and bypass solenoid valve, described outer machine system extends outward the first pipeline, second pipeline and the 3rd pipeline, described first pipeline is connected with described indoor apparatus of air conditioner system and described hydraulic module system pipeline respectively, described second pipeline and described 3rd pipeline are connected with described first cooling and warming switching device shifter and described second cooling and warming switching device shifter pipeline respectively, described first cooling and warming switching device shifter is connected with described indoor apparatus of air conditioner system pipeline, described second cooling and warming switching device shifter is connected with described hydraulic module system pipeline, connect described first pipeline, the pipeline of described hydraulic module system be connected described second cooling and warming switching device shifter, the pipeline of described hydraulic module system is connected by by-pass line, described bypass solenoid valve is located on described by-pass line.
Beneficial effect is: at described first pipeline of connection, the pipeline of described hydraulic module system be connected described second cooling and warming switching device shifter, the pipeline of described hydraulic module system is connected by by-pass line, and on by-pass line, by-passing valve is set, when air-conditioning system enters oil return or defrost state, by-passing valve can be opened, refrigerant is made to flow into the second cooling and warming switching device shifter from by-pass line after the first pipeline flows out, avoid the refrigerant when oil return or defrost state and enter hydraulic module system, refrigerant is avoided to cause freezing of hydraulic module system, blocking pipeline, thus the impact avoided user's comfort and system operation reliability.
Further, described outer machine system comprises compressor, the output of described compressor connects the input of oil eliminator by check valve, an output siphunculus pipeline of described oil eliminator connects the interface of the first cross valve respectively, the interface of the second cross valve and the interface of the 3rd cross valve, two interfaces of described first cross valve connect the input of the first outdoor condenser and the input of the second off-premises station stop valve respectively by pipeline, the output of described second off-premises station stop valve connects described second pipeline, the output of described first outdoor condenser connects the input of the first off-premises station throttle part by pipeline, the output of described first off-premises station throttle part connects the input of the first off-premises station stop valve by pipeline, the output of described first off-premises station stop valve connects described first pipeline, two interfaces of described second cross valve connect the input of the second outdoor condenser and the input of described second off-premises station stop valve respectively by pipeline, the output of described second outdoor condenser connects the input of the second off-premises station throttle part by pipeline, described second off-premises station throttle part output connected the input of described first off-premises station stop valve by pipeline, two interfaces of described 3rd cross valve connect the input of described second off-premises station stop valve and the input of the 3rd off-premises station stop valve respectively by pipeline, the output of described 3rd off-premises station stop valve connects described 3rd pipeline, the input of described compressor connects the output of gas-liquid separator by pipeline, the input of described gas-liquid separator connects the input of described second off-premises station stop valve by pipeline, the output of described gas-liquid separator also connects described oil eliminator by pipeline.
Further, described first outdoor condenser is provided with the first outdoor fan, and described second outdoor condenser is provided with the second outdoor fan.
Adopt the beneficial effect of above-mentioned further scheme to be: the first outdoor fan and the second outdoor fan the condensation effect strengthening the first outdoor condenser and the second outdoor condenser is set.
Further, described hydraulic module system comprises heat reclamation device throttle part, hydro-thermal heat exchanger and water pump, the output of described heat reclamation device throttle part is connected with described hydro-thermal heat exchanger tube, the input of described heat reclamation device throttle part is connected with described first pipeline by pipeline, the water inlet of described hydro-thermal heat exchanger is connected with described water pump by pipeline, and described hydro-thermal heat exchanger is connected by the output of pipeline with described second cooling and warming switching device shifter.
The beneficial effect of above-mentioned further scheme is adopted to be: in hydraulic module system, the ventilation of hydro-thermal heat can realize recuperation of heat with heat reclamation device throttle part and utilizes.
Further, an interface of described first cross valve is connected to the pipeline of the input connecting described second off-premises station stop valve by the first capillary; An interface of described second cross valve be connected to by the second capillary connect described second off-premises station stop valve pipeline on; An interface of described 3rd cross valve is connected to the pipeline of the input connecting described second off-premises station stop valve by three capillary.
The beneficial effect of above-mentioned further scheme is adopted to be: arranging of the first capillary, the second capillary and three capillary can play a protective role to the first cross valve, the second cross valve and the 3rd cross valve respectively, plays throttling action.
Further, the pipeline of the output and described oil eliminator that connect described gas-liquid separator is provided with oil return capillary.
The beneficial effect of above-mentioned further scheme is adopted to be: throttling action is played in the setting of oil return capillary.
Further, described indoor apparatus of air conditioner system comprises indoor set throttle part, indoor set heat exchanger and indoor fan, the input of described indoor set throttle part connects described first pipeline by pipeline, the output of described indoor set throttle part connects one end of described indoor set heat exchanger by pipeline, the other end of described indoor set heat exchanger connects described first cooling and warming switching device shifter by pipeline, and described indoor fan is located on described indoor set heat exchanger.
Accompanying drawing explanation
Fig. 1 is the flow chart of the inventive method;
Fig. 2 is the structural representation of air-conditioning system of the present invention;
In accompanying drawing, the list of parts representated by each label is as follows:
1, compressor, 2, check valve, 3, oil eliminator, 4, first cross valve, 5, second cross valve, 6, 3rd cross valve, 7, first outdoor condenser, 8, second outdoor condenser, 9, first outdoor fan, 10, second outdoor fan, 11, first capillary, 12, second capillary, 13, three capillary, 14, first off-premises station throttle part, 15, second off-premises station throttle part, 16, first off-premises station stop valve, 17, second off-premises station stop valve, 18, 3rd off-premises station stop valve, 19, oil return capillary, 20, first cooling and warming switching device shifter, 21, second cooling and warming switching device shifter, 22, indoor set throttle part, 23, indoor set heat exchanger, 24, indoor fan, 25, heat reclamation device throttle part, 26, hydro-thermal heat exchanger, 27, water pump, 28, gas-liquid separator, 29, first pipeline, 30, second pipeline, 31, 3rd pipeline, 32, outer machine system, 33, indoor apparatus of air conditioner system, 34, hydraulic module system, 35, by-pass line, 36, bypass solenoid valve.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, the inventive method comprises the following steps:
Step one, the port being connected cooling and warming switching device shifter by by-pass line 35 is communicated with the output channel of outdoor machine of air-conditioner system 32, and arranges bypass solenoid valve 36 on by-pass line 35, detects air-conditioning system in real time and whether enters oil return or defrost state;
Step 2, when air-conditioning system enters oil return or defrost, switches to refrigeration mode by recovering apparatus for heat of air-conditioner;
Step 3, closes the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part 25, opens bypass solenoid valve 36;
Step 4, receive after the signal that oil return or defrost terminate until air-conditioning system, close bypass solenoid valve 36, heat reclamation device switches to the pattern before oil return or defrost, and the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part 25 is opened.
In described step 3, before the electric expansion valve of closing described recovering apparatus for heat of air-conditioner throttle part 25, the aperture of air-conditioning system to the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part 25 is preserved.In described step 4, after the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part 25 is opened, recover the aperture before oil return or defrost.
As shown in Figure 2, air-conditioning system of the present invention comprises outer machine system 32, first cooling and warming switching device shifter 20, second cooling and warming switching device shifter 21, indoor apparatus of air conditioner system 33, hydraulic module system 34 and bypass solenoid valve 36, described outer machine system 32 extends outward the first pipeline 29, second pipeline 30 and the 3rd pipeline 31, described first pipeline 29 is connected with described indoor apparatus of air conditioner system 33 and described hydraulic module system 34 pipeline respectively, described second pipeline 30 and described 3rd pipeline 31 are connected with described first cooling and warming switching device shifter 20 and described second cooling and warming switching device shifter 21 pipeline respectively, described first cooling and warming switching device shifter 20 is connected with described indoor apparatus of air conditioner system 33 pipeline, described second cooling and warming switching device shifter 21 is connected with described hydraulic module system 34 pipeline, connect described first pipeline 29, the pipeline of described hydraulic module system 34 be connected described second cooling and warming switching device shifter 21, the pipeline of described hydraulic module system 34 is connected by by-pass line 35, described bypass solenoid valve 36 is located on described by-pass line 35.
Described outer machine system 32 comprises compressor 1, the output of described compressor 1 connects the input of oil eliminator 3 by check valve 2, an output siphunculus pipeline of described oil eliminator 3 connects the interface of the first cross valve 4 respectively, the interface of the second cross valve 5 and the interface of the 3rd cross valve 6, two interfaces of described first cross valve 4 connect the input of the first outdoor condenser 7 and the input of the second off-premises station stop valve 17 respectively by pipeline, the output of described second off-premises station stop valve 17 connects described second pipeline 30, the output of described first outdoor condenser 7 connects the input of the first off-premises station throttle part 14 by pipeline, the output of described first off-premises station throttle part 14 connects the input of the first off-premises station stop valve 16 by pipeline, the output of described first off-premises station stop valve 16 connects described first pipeline 29, two interfaces of described second cross valve 5 connect the input of the second outdoor condenser 8 and the input of described second off-premises station stop valve 17 respectively by pipeline, the output of described second outdoor condenser 8 connects the input of the second off-premises station throttle part 15 by pipeline, described second off-premises station throttle part 15 output connected the input of described first off-premises station stop valve 16 by pipeline, two interfaces of described 3rd cross valve 6 connect the input of described second off-premises station stop valve 17 and the input of the 3rd off-premises station stop valve 18 respectively by pipeline, the output of described 3rd off-premises station stop valve 18 connects described 3rd pipeline 31, the input of described compressor 1 connects the output of gas-liquid separator 28 by pipeline, the input of described gas-liquid separator 28 connects the input of described second off-premises station stop valve 17 by pipeline, the output of described gas-liquid separator 28 also connects described oil eliminator 3 by pipeline.
Described first outdoor condenser 7 is provided with the first outdoor fan 9, and described second outdoor condenser 8 is provided with the second outdoor fan 10.Described hydraulic module system 34 comprises heat reclamation device throttle part 25, hydro-thermal heat exchanger 26 and water pump 27, the output of described heat reclamation device throttle part 25 is connected with described hydro-thermal heat exchanger 26 pipeline, the input of described heat reclamation device throttle part 25 is connected with described first pipeline 29 by pipeline, the water inlet of described hydro-thermal heat exchanger 26 is connected with described water pump 27 by pipeline, and described hydro-thermal heat exchanger 26 is connected by the output of pipeline with described second cooling and warming switching device shifter 21.An interface of described first cross valve 4 is connected to the pipeline of the input connecting described second off-premises station stop valve 17 by the first capillary 11; An interface of described second cross valve 5 be connected to by the second capillary 12 connect described second off-premises station stop valve 17 pipeline on; An interface of described 3rd cross valve 6 is connected to the pipeline of the input connecting described second off-premises station stop valve 17 by three capillary 13.The pipeline of the output and described oil eliminator 3 that connect described gas-liquid separator 28 is provided with oil return capillary 19.Described indoor apparatus of air conditioner system 33 comprises indoor set throttle part 22, indoor set heat exchanger 23 and indoor fan 24, the input of described indoor set throttle part 22 connects described first pipeline 29 by pipeline, the output of described indoor set throttle part 22 connects one end of described indoor set heat exchanger 23 by pipeline, the other end of described indoor set heat exchanger 23 connects described first cooling and warming switching device shifter 20 by pipeline, and described indoor fan 24 is located on described indoor set heat exchanger 23.
This air-conditioning system has following mode of operation:
Heating mode:
Heat when indoor apparatus of air conditioner is in, when heat reclamation device is also in water heating pattern, system is pure heating mode, after refrigerant compresses from compressor 1, successively through check valve 2, oil eliminator 3, 3rd cross valve 6, after 3rd off-premises station stop valve 18, machine goes to indoor outdoor, coldly switching device shifter is heated respectively through indoor apparatus of air conditioner and heat reclamation device and the first cooling and warming switching device shifter 20 and second after coolant distribution, outdoor machine system 32 is got back to from the first off-premises station stop valve 16, be divided into two-way, one tunnel is successively through the first off-premises station throttle part 14, first outdoor condenser 7, first four-way pipe, gas-liquid separator 28, then compressor 1 is got back to, another road is successively through the second off-premises station throttle part 15, second outdoor condenser 8, second cross valve 5, gas-liquid separator 28, then compressor 1 is got back to, complete and heat circulation.
Refrigeration mode:
When indoor apparatus of air conditioner is in refrigeration, when heat reclamation device is also in chilled water pattern, system is pure refrigeration mode, after refrigerant compresses from compressor 1, successively through check valve 2, two-way is divided into after oil eliminator 3, one tunnel is successively through the first cross valve 4, first outdoor condenser 7, first off-premises station throttle part 14, machine stop valve goes to indoor outdoor, another road is successively through the second cross valve 5, second outdoor condenser 8, second off-premises station throttle part 15, machine stop valve goes to indoor outdoor, respectively through indoor apparatus of air conditioner and heat reclamation device and the first cooling and warming switching device shifter 20 and the second cooling and warming switching device shifter 21 after coolant distribution, outdoor machine system 32 is got back to from the second off-premises station stop valve 17, then compressor 1 is got back to through gas-liquid separator 28.
Mixed mode:
When indoor apparatus of air conditioner is in refrigeration, when heat reclamation device is in water heating pattern, system is mixed running pattern, after refrigerant compresses from compressor 1, successively through check valve 2, oil eliminator 3, then two-way is divided into, one tunnel is respectively through the first cross valve 4-the first outdoor condenser 7-the first off-premises station throttle part 14-the second off-premises station stop valve 17, second cross valve 5-the second outdoor condenser 8-the second off-premises station throttle part 15-the second off-premises station stop valve 17, then indoor is gone to from the second off-premises station stop valve 17, another road is through the 3rd cross valve 6, after 3rd off-premises station stop valve 18, machine goes to heat reclamation device condensing heat-exchange outdoor, then through the second cooling and warming switching device shifter 21, to indoor apparatus of air conditioner evaporation and heat-exchange after converging with the first via, again through the first cooling and warming switching device shifter 20, outdoor machine system 32 is got back to from the second off-premises station stop valve 17, then compressor 1 is got back to through gas-liquid separator 28, complete circulation.
Heat reclamation device standby mode:
Freeze standby: heat reclamation device throttle part 25 is closed, water pump 27 cuts out.
Heating standby: heat reclamation device throttle part 25 is opened, water pump 27 cuts out.
Heating mode: heat reclamation device throttle part 25 free adjustment, water pump 27 is opened.
The port being connected cooling and warming switching device shifter by by-pass line 35 is communicated with the output channel of outdoor machine of air-conditioner system 32, and bypass solenoid valve 36 is set on by-pass line 35, when air-conditioning system enters oil return or defrost state, close the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part 25, open bypass solenoid valve 36, refrigerant is without hydraulic module system 34, under the prerequisite meeting oil return and defrost requirement, avoid refrigerant and cause freezing of hydraulic module system 34, blocking pipeline, thus the impact avoided user's comfort and system operation reliability.Carry out the aperture of the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part 25 preserving the aperture that can ensure before the recovery of electric expansion valve after oil return or defrost.Make the aperture situation that electric expansion valve can be satisfied the demand.First outdoor fan 9 and the second outdoor fan 10 the condensation effect strengthening the first outdoor condenser 7 and the second outdoor condenser 8 is set.In hydraulic module system 34, the ventilation of hydro-thermal heat can realize recuperation of heat utilize with heat reclamation device throttle part 25.First capillary 11, second capillary 12 and arranging of three capillary 13 can play a protective role to the first cross valve 4, second cross valve 5 and the 3rd cross valve 6 respectively, play throttling action.Throttling action is played in the setting of oil return capillary 19.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. three oil return of control multi-online air-conditioning system or defrosting control methods, is characterized in that, comprise the following steps:
Step one, connects the port of cooling and warming switching device shifter and the output channel of outdoor machine of air-conditioner system (32) by by-pass line (35), and arrange bypass solenoid valve (36) on by-pass line (35);
Step 2, when air-conditioning system enters oil return or defrost, switches to refrigeration mode by recovering apparatus for heat of air-conditioner;
Step 3, closes the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part (25), opens bypass solenoid valve (36);
Step 4, receive after the signal that oil return or defrost terminate until air-conditioning system, close bypass solenoid valve (36), heat reclamation device switches to the pattern before oil return or defrost, and the electric expansion valve of recovering apparatus for heat of air-conditioner throttle part (25) is opened.
2. a kind of three oil return of control multi-online air-conditioning system or defrosting control methods according to claim 1, it is characterized in that, in described step 3, before the electric expansion valve of closing described recovering apparatus for heat of air-conditioner throttle part (25), the aperture of air-conditioning system to the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part (25) is preserved.
3. a kind of three oil return of control multi-online air-conditioning system or defrosting control methods according to claim 2, it is characterized in that, in described step 4, after the electric expansion valve of described recovering apparatus for heat of air-conditioner throttle part (25) is opened, recover the aperture before oil return or defrost.
4. the three control multi-online air-conditioning systems adopting the control method described in any one of claims 1 to 3 to control, it is characterized in that, comprise outer machine system (32), first cooling and warming switching device shifter (20), second cooling and warming switching device shifter (21), indoor apparatus of air conditioner system (33), hydraulic module system (34) and bypass solenoid valve (36), described outer machine system (32) extends outward the first pipeline (29), second pipeline (30) and the 3rd pipeline (31), described first pipeline (29) is connected with described indoor apparatus of air conditioner system (33) and described hydraulic module system (34) pipeline respectively, described second pipeline (30) is connected with described first cooling and warming switching device shifter (20) and described second cooling and warming switching device shifter (21) pipeline respectively with described 3rd pipeline (31), described first cooling and warming switching device shifter (20) is connected with described indoor apparatus of air conditioner system (33) pipeline, described second cooling and warming switching device shifter (21) is connected with described hydraulic module system (34) pipeline, connect described first pipeline (29), the pipeline of described hydraulic module system (34) be connected described second cooling and warming switching device shifter (21), the pipeline of described hydraulic module system (34) is connected by by-pass line (35), described bypass solenoid valve (36) is located on described by-pass line (35).
5. a kind of three control multi-online air-conditioning systems according to claim 4, it is characterized in that, described outer machine system (32) comprises compressor (1), the output of described compressor (1) connects the input of oil eliminator (3) by check valve (2), an output siphunculus pipeline of described oil eliminator (3) connects the interface of the first cross valve (4) respectively, the interface of the second cross valve (5) and the interface of the 3rd cross valve (6), two interfaces of described first cross valve (4) connect the input of the first outdoor condenser (7) and the input of the second off-premises station stop valve (17) respectively by pipeline, the output of described second off-premises station stop valve (17) connects described second pipeline (30), the output of described first outdoor condenser (7) connects the input of the first off-premises station throttle part (14) by pipeline, the output of described first off-premises station throttle part (14) connects the input of the first off-premises station stop valve (16) by pipeline, the output of described first off-premises station stop valve (16) connects described first pipeline (29), two interfaces of described second cross valve (5) connect the input of the second outdoor condenser (8) and the input of described second off-premises station stop valve (17) respectively by pipeline, the output of described second outdoor condenser (8) connects the input of the second off-premises station throttle part (15) by pipeline, described second off-premises station throttle part (15) output connected the input of described first off-premises station stop valve (16) by pipeline, two interfaces of described 3rd cross valve (6) connect the input of described second off-premises station stop valve (17) and the input of the 3rd off-premises station stop valve (18) respectively by pipeline, the output of described 3rd off-premises station stop valve (18) connects described 3rd pipeline (31), the input of described compressor (1) connects the output of gas-liquid separator (28) by pipeline, the input of described gas-liquid separator (28) connects the input of described second off-premises station stop valve (17) by pipeline, the output of described gas-liquid separator (28) also connects described oil eliminator (3) by pipeline.
6. a kind of three control multi-online air-conditioning systems according to claim 5, it is characterized in that, described first outdoor condenser (7) is provided with the first outdoor fan (9), and described second outdoor condenser (8) is provided with the second outdoor fan (10).
7. the one three control multi-online air-conditioning system according to any one of claim 4 to 6, it is characterized in that, described hydraulic module system (34) comprises heat reclamation device throttle part (25), hydro-thermal heat exchanger (26) and water pump (27), the output of described heat reclamation device throttle part (25) is connected with described hydro-thermal heat exchanger (26) pipeline, the input of described heat reclamation device throttle part (25) is connected with described first pipeline (29) by pipeline, the water inlet of described hydro-thermal heat exchanger (26) is connected with described water pump (27) by pipeline, described hydro-thermal heat exchanger (26) is connected by the output of pipeline with described second cooling and warming switching device shifter (21).
8. the one three control multi-online air-conditioning system according to any one of claim 4 to 6, it is characterized in that, an interface of described first cross valve (4) is connected to the pipeline of the input connecting described second off-premises station stop valve (17) by the first capillary (11); An interface of described second cross valve (5) be connected to by the second capillary (12) connect described second off-premises station stop valve (17) pipeline on; An interface of described 3rd cross valve (6) is connected to the pipeline of the input connecting described second off-premises station stop valve (17) by three capillary (13).
9. the one three control multi-online air-conditioning system according to any one of claim 4 to 6, it is characterized in that, the pipeline of the output and described oil eliminator (3) that connect described gas-liquid separator (28) is provided with oil return capillary (19).
10. the one three control multi-online air-conditioning system according to any one of claim 4 to 6, it is characterized in that, described indoor apparatus of air conditioner system (33) comprises indoor set throttle part (22), indoor set heat exchanger (23) and indoor fan (24), the input of described indoor set throttle part (22) connects described first pipeline (29) by pipeline, the output of described indoor set throttle part (22) connects one end of described indoor set heat exchanger (23) by pipeline, the other end of described indoor set heat exchanger (23) connects described first cooling and warming switching device shifter (20) by pipeline, described indoor fan (24) is located on described indoor set heat exchanger (23).
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