CN104792075A - 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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- CN104792075A CN104792075A CN201510208677.9A CN201510208677A CN104792075A CN 104792075 A CN104792075 A CN 104792075A CN 201510208677 A CN201510208677 A CN 201510208677A CN 104792075 A CN104792075 A CN 104792075A
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- pipeline
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- valve
- heat exchanger
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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
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention 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 step 1, the temperature T1 of outlet water of a water heat exchanger is detected in real time; step 2, when an air-conditioning system conducts oil return or defrosting, a heat recovery unit is switched to a refrigerating mode; step 3, when it is detected that the outlet water temperature T1 is larger than the low temperature T, an electromagnetic expansion valve of a throttling part is opened to the set fixed opening degree, and after the system receives the ending signal of oil return or defrosting, the heat recovery unit is switched to be the mode before oil return or defrosting; step 4, when it is detected that the outlet water temperature T1 is lower than the low temperature T, the electromagnetic expansion valve of the throttling part of the heat recycling device is turned off, a bypass electromagnetic valve is turned on, and after the system receives the ending signal of oil return or defrosting, the heat recycling device is switched into the mode before oil return or defrosting. By means of the three-tube multi-split air-conditioning system oil return or defrosting control method and the system thereof, the situation that water in the water heat exchanger is frozen under the temperature of oil return or defrosting, so that user use comfort and system operation reliability are affected is avoided.
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, 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, detected the output water temperature T1 of hydro-thermal heat exchanger by leaving water temperature sensors in real time, detect air-conditioning system in real time and whether enter oil return or defrost state;
Step 2, when air-conditioning system enters oil return or defrost, heat reclamation device switches to refrigeration mode;
Step 3, the low temperature T of leaving water temperature T1 and setting is compared, when detecting that leaving water temperature T1 is greater than low temperature T, the electromagnetic expanding valve of the throttle part of heat reclamation device is opened to the fixing aperture of setting, after system acceptance to oil return or defrost end signal, the electromagnetic expanding valve of the throttle part of heat reclamation device returns to original aperture, and heat reclamation device switches to the pattern before oil return or defrost;
Step 4, when detecting that leaving water temperature T1 is less than low temperature T, close the electromagnetic expanding valve of the throttle part of heat reclamation device, open bypass solenoid valve, arrive after oil return or defrost end signal until system acceptance, the electromagnetic expanding valve of the throttle part of heat reclamation device returns to original aperture, and heat reclamation device switches to the pattern before oil return or defrost.
The invention has the beneficial effects as follows: by the detection of the output water temperature to hydro-thermal heat exchanger, and output water temperature T1 and design temperature T is compared, when output water temperature T1 is higher than set water temperature T, illustrate that the water in hydro-thermal heat exchanger is also in the temperature of trouble free service, when output water temperature T1 is lower than design temperature T, if illustrate and continue to allow refrigerant enter into hydro-thermal heat exchanger, water in hydro-thermal heat exchanger has icing or may affect hydro-thermal heat exchanger serviceability temperature, at this moment, the electromagnetic expanding valve of the throttle part of timely closedown heat reclamation device, open bypass solenoid valve, make refrigerant without hydro-thermal heat exchanger, and diameter passes through from bypass solenoid valve, the temperature when oil return or defrost of the water in the water heat exchanger of heat reclamation device is avoided to reduce even icing, affect 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 2, when described heat reclamation device is heating mode before oil return or defrost, after detecting that air-conditioning system enters oil return or the operation of defrost mould, preserve the aperture of the electromagnetic expanding valve of the throttle part of current heat reclamation device, then the electromagnetic expanding valve of the throttle part of heat reclamation device is opened to fixed mode.
Adopt the beneficial effect of above-mentioned further scheme to be: described heat reclamation device before oil return or defrost for heating mode time, heat can be had by remnants in water heat exchanger, refrigerant can be allowed temporarily through described hydro-thermal heat exchanger.
Further, in described step one, also detect the water outlet current of described hydro-thermal heat exchanger in real time.
Adopting the beneficial effect of above-mentioned further scheme to be: by monitoring the water outlet current of described hydro-thermal heat exchanger, can judge whether the water in hydro-thermal heat exchanger freezes, blocking pipe.
Further, in described step 2, described heat reclamation device before oil return or defrost be heating standby or refrigeration mode time, after air-conditioning system detects that air-conditioning system enters oil return or the operation of defrost mould, heat reclamation device switches to refrigeration mode, then opens the water pump connecting hydro-thermal heat exchanger, when the water outlet current of hydro-thermal heat exchanger not detected, close the electromagnetic expanding valve of the throttle part of heat reclamation device, open bypass solenoid valve, until oil return or defrost terminate; When the water outlet current of hydro-thermal heat exchanger being detected, then carry out step 3 and step 4.
Adopt the beneficial effect of above-mentioned further scheme to be: after opening the water pump connecting hydro-thermal heat exchanger, if when the water outlet current of hydro-thermal heat exchanger not detected, the water icing blocking pipe in hydro-thermal heat exchanger is described.
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, heat reclamation device, hydro-thermal heat exchanger, water pump, leaving water temperature sensors, current inductor 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 the throttle part pipeline of described indoor apparatus of air conditioner system and described heat reclamation device 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 hydro-thermal heat exchanger tube, the throttle part of described heat reclamation device is connected with described hydro-thermal heat exchanger tube, the water inlet of described hydro-thermal heat exchanger connects water pump by pipeline, the water outlet of described hydro-thermal heat exchanger is provided with the leaving water temperature sensors for detecting coolant-temperature gage and the current inductor for detecting water outlet current, connect described first pipeline, the pipeline of described heat reclamation device be connected described second cooling and warming switching device shifter, the pipeline of described hydro-thermal heat exchanger is connected by by-pass line, described bypass solenoid valve is located on described by-pass line.
The beneficial effect of native system is: by setting out water temperature sensor at the delivery port of hydro-thermal heat exchanger, the leaving water temperature of hydro-thermal heat exchanger can be detected in real time, thus judge whether the temperature of the water in hydro-thermal heat exchanger is in the scope of normal work, in the process of oil return or defrost, when the temperature that leaving water temperature sensors detects is lower than design temperature, the electromagnetic expanding valve of the throttle part of heat reclamation device can be closed in time, open bypass solenoid valve, make refrigerant without hydro-thermal heat exchanger, and diameter passes through from bypass solenoid valve, the temperature when oil return or defrost of the water in the water heat exchanger of heat reclamation device is avoided to reduce even icing, affect user's comfort and system operation reliability, arranging of current inductor can when opening water pump according to whether detecting that current judge that whether and block water in hydro-thermal heat exchanger.
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, 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, 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 structural representation of air-conditioning system of the present invention;
Fig. 2 is when described heat reclamation device schematic diagram for heating mode before oil return or defrost in method of the present invention;
Fig. 3 is when described heat reclamation device is schematic diagram when heating standby or refrigeration mode before oil return or defrost in method 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, 26, hydro-thermal heat exchanger, 27, water pump, 28, leaving water temperature sensors, 29, current inductor, 30, by-pass line, 31, bypass solenoid valve, 32, gas-liquid separator, 33, first pipeline, 34, second pipeline, 35, 3rd pipeline, 36, outer machine system, 37, indoor apparatus of air conditioner system.
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, air-conditioning system of the present invention comprises outer machine system 36, first cooling and warming switching device shifter 20, second cooling and warming switching device shifter 21, indoor apparatus of air conditioner system 37, heat reclamation device 25, hydro-thermal heat exchanger 26, water pump 27, leaving water temperature sensors 28, current inductor 29 and bypass solenoid valve 31, described outer machine system 36 extends outward the first pipeline 33, second pipeline 34 and the 3rd pipeline 35, described first pipeline 33 is connected with the throttle part pipeline of described indoor apparatus of air conditioner system 37 and described heat reclamation device 25 respectively, described second pipeline 34 and described 3rd pipeline 35 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 37 pipeline, described second cooling and warming switching device shifter 21 is connected with described hydro-thermal heat exchanger 26 pipeline, the throttle part of described heat reclamation device 25 is connected with described hydro-thermal heat exchanger 26 pipeline, the water inlet of described hydro-thermal heat exchanger 26 connects water pump 27 by pipeline, the water outlet of described hydro-thermal heat exchanger 26 is provided with the leaving water temperature sensors 28 for detecting coolant-temperature gage and the current inductor 29 for detecting water outlet current, connect described first pipeline 33, the pipeline of described heat reclamation device 25 be connected described second cooling and warming switching device shifter 21, the pipeline of described hydro-thermal heat exchanger 26 is connected by by-pass line 30, described bypass solenoid valve 31 is located on described by-pass line 30.
Described outer machine system 36 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 34, 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 33, 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 35, the input of described compressor 1 connects the output of gas-liquid separator 32 by pipeline, the input of described gas-liquid separator 32 connects the input of described second off-premises station stop valve 17 by pipeline, the output of described gas-liquid separator 32 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.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 32 is provided with oil return capillary 19.Described indoor apparatus of air conditioner system 37 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 33 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 25 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 25 and the first cooling and warming switching device shifter 20 and second after coolant distribution, outdoor machine system 36 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 32, 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 32, 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 25 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 25 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 36 is got back to from the second off-premises station stop valve 17, then compressor 1 is got back to through gas-liquid separator 32.
Mixed mode:
When indoor apparatus of air conditioner is in refrigeration, when heat reclamation device 25 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 25 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 36 is got back to from the second off-premises station stop valve 17, then compressor 1 is got back to through gas-liquid separator 32, complete circulation.
Heat reclamation device 25 standby mode:
Freeze standby: the throttle part of heat reclamation device 25 is closed, and water pump 27 cuts out.
Heating standby: the throttle part of heat reclamation device 25 is opened, water pump 27 cuts out.
Heating mode: the throttle part free adjustment of heat reclamation device 25, water pump 27 is opened.
As shown in Figure 2, in the inventive method when described heat reclamation device 25 is heating mode before oil return or defrost, comprise the following steps:
Step one, the port being connected cooling and warming switching device shifter by by-pass line 30 is communicated with the output channel of outdoor machine of air-conditioner system 36, and bypass solenoid valve 31 is set on by-pass line 30, detected the output water temperature T1 of hydro-thermal heat exchanger 26 by leaving water temperature sensors 28 in real time, detect air-conditioning system in real time and whether enter oil return or defrost state;
Step 2, when described heat reclamation device 25 is heating mode before oil return or defrost, after detecting that air-conditioning system enters oil return or the operation of defrost mould, preserve the aperture of the electromagnetic expanding valve of the throttle part of current heat reclamation device 25, then the electromagnetic expanding valve of the throttle part of heat reclamation device 25 is opened to fixed mode, heat reclamation device 25 switches to refrigeration mode;
Step 3, the low temperature T of leaving water temperature T1 and setting is compared, when detecting that leaving water temperature T1 is greater than low temperature T, the electromagnetic expanding valve of the throttle part of heat reclamation device 25 is opened to the fixing aperture of setting, after system acceptance to oil return or defrost end signal, the electromagnetic expanding valve of the throttle part of heat reclamation device 25 returns to original aperture, and heat reclamation device 25 switches to the pattern before oil return or defrost;
Step 4, when detecting that leaving water temperature T1 is less than low temperature T, close the electromagnetic expanding valve of the throttle part of heat reclamation device 25, open bypass solenoid valve 31, arrive after oil return or defrost end signal until system acceptance, the electromagnetic expanding valve of the throttle part of heat reclamation device 25 returns to original aperture, and heat reclamation device 25 switches to the pattern before oil return or defrost.
As shown in Figure 3, heat reclamation device 25 described in this method before oil return or defrost be heating standby or refrigeration mode time, comprise the following steps:
Step one, the port being connected cooling and warming switching device shifter by by-pass line 30 is communicated with the output channel of outdoor machine of air-conditioner system 36, and bypass solenoid valve 31 is set on by-pass line 30, the output water temperature T1 of real-time detection hydro-thermal heat exchanger 26, whether real-time detection air-conditioning system enters oil return or defrost state, detects the water outlet current of described hydro-thermal heat exchanger 26;
Step 2, after air-conditioning system detects that air-conditioning system enters oil return or the operation of defrost mould, heat reclamation device 25 switches to refrigeration mode, then the water pump 27 connecting hydro-thermal heat exchanger 26 is opened, when the water outlet current of hydro-thermal heat exchanger 26 not detected, close the electromagnetic expanding valve of the throttle part of heat reclamation device 25, open bypass solenoid valve 31, until oil return or defrost terminate;
Step 3, when the water outlet current of hydro-thermal heat exchanger 26 being detected, the low temperature T of leaving water temperature T1 and setting is compared, when detecting that leaving water temperature T1 is greater than low temperature T, the electromagnetic expanding valve of the throttle part of heat reclamation device 25 is opened to the fixing aperture of setting, after system acceptance to oil return or defrost end signal, the electromagnetic expanding valve of the throttle part of heat reclamation device 25 returns to original aperture, and heat reclamation device 25 switches to the pattern before oil return or defrost; When detecting that leaving water temperature T1 is less than low temperature T, close the electromagnetic expanding valve of the throttle part of heat reclamation device 25, open bypass solenoid valve 31, arrive after oil return or defrost end signal until system acceptance, the electromagnetic expanding valve of the throttle part of heat reclamation device 25 returns to original aperture, and heat reclamation device 25 switches to the pattern before oil return or defrost.
By the detection of the output water temperature to hydro-thermal heat exchanger 26, and output water temperature T1 and design temperature T is compared, when output water temperature T1 is higher than set water temperature T, illustrate that the water in hydro-thermal heat exchanger 26 is also in the temperature of trouble free service, when output water temperature T1 is lower than design temperature T, if illustrate and continue to allow refrigerant enter into hydro-thermal heat exchanger 26, water in hydro-thermal heat exchanger 26 has icing or may affect hydro-thermal heat exchanger 26 serviceability temperature, at this moment, the electromagnetic expanding valve of the throttle part of timely closedown heat reclamation device 25, open bypass solenoid valve 31, make refrigerant without hydro-thermal heat exchanger 26, and diameter passes through from bypass solenoid valve 31, the temperature when oil return or defrost of the water in the water heat exchanger of heat reclamation device 25 is avoided to reduce even icing, affect user's comfort and system operation reliability.
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 (9)
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, the port of cooling and warming switching device shifter and the output channel of outdoor machine of air-conditioner system (36) is connected by by-pass line (30), and bypass solenoid valve (31) is set on by-pass line (30), the output water temperature T1 of hydro-thermal heat exchanger (26) is detected in real time by leaving water temperature sensors (28);
Step 2, when air-conditioning system enters oil return or defrost, heat reclamation device (25) switches to refrigeration mode;
Step 3, the low temperature T of leaving water temperature T1 and setting is compared, when detecting that leaving water temperature T1 is greater than low temperature T, the electromagnetic expanding valve of the throttle part of heat reclamation device (25) is opened to the fixing aperture of setting, after system acceptance to oil return or defrost end signal, the electromagnetic expanding valve of the throttle part of heat reclamation device (25) returns to original aperture, and heat reclamation device (25) switches to the pattern before oil return or defrost;
Step 4, when detecting that leaving water temperature T1 is less than low temperature T, close the electromagnetic expanding valve of the throttle part of heat reclamation device (25), open bypass solenoid valve (31), arrive after oil return or defrost end signal until system acceptance, the electromagnetic expanding valve of the throttle part of heat reclamation device (25) returns to original aperture, and heat reclamation device (25) switches to the pattern before oil return or defrost.
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 2, when described heat reclamation device (25) is heating mode before oil return or defrost, after detecting that air-conditioning system enters oil return or the operation of defrost mould, preserve the aperture of the electromagnetic expanding valve of the throttle part of current heat reclamation device (25), then the electromagnetic expanding valve of the throttle part of heat reclamation device (25) is opened to fixed mode.
3. a kind of three oil return of control multi-online air-conditioning system or defrosting control methods according to claim 1, is characterized in that, in described step one, whether the delivery port also detecting described hydro-thermal heat exchanger (26) has water outlet current.
4. a kind of three oil return of control multi-online air-conditioning system or defrosting control methods according to claim 3, it is characterized in that, in described step 2, described heat reclamation device (25) before oil return or defrost be heating standby or refrigeration mode time, after air-conditioning system detects that air-conditioning system enters oil return or the operation of defrost mould, heat reclamation device (25) switches to refrigeration mode, then the water pump (27) connecting hydro-thermal heat exchanger (26) is opened, when the water outlet current of hydro-thermal heat exchanger (26) not detected, close the electromagnetic expanding valve of the throttle part of heat reclamation device (25), open bypass solenoid valve (31), until oil return or defrost terminate, when the water outlet current of hydro-thermal heat exchanger (26) being detected, then carry out step 3 and step 4.
5. the three control multi-online air-conditioning systems adopting the control method described in any one of Claims 1-4 to carry out controlling, it is characterized in that, comprise outer machine system (36), first cooling and warming switching device shifter (20), second cooling and warming switching device shifter (21), indoor apparatus of air conditioner system (37), heat reclamation device (25), hydro-thermal heat exchanger (26), water pump (27), leaving water temperature sensors (28), current inductor (29) and bypass solenoid valve (31), described outer machine system (36) extends outward the first pipeline (33), second pipeline (34) and the 3rd pipeline (35), described first pipeline (33) is connected with the throttle part pipeline of described indoor apparatus of air conditioner system (37) and described heat reclamation device (25) respectively, described second pipeline (34) 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 (35), described first cooling and warming switching device shifter (20) is connected with described indoor apparatus of air conditioner system (37) pipeline, described second cooling and warming switching device shifter (21) is connected with described hydro-thermal heat exchanger (26) pipeline, the throttle part of described heat reclamation device (25) is connected with described hydro-thermal heat exchanger (26) pipeline, the water inlet of described hydro-thermal heat exchanger (26) connects water pump (27) by pipeline, the water outlet of described hydro-thermal heat exchanger (26) is provided with the leaving water temperature sensors (28) for detecting coolant-temperature gage and the current inductor (29) for detecting water outlet current, connect described first pipeline (33), the pipeline of described heat reclamation device (25) be connected described second cooling and warming switching device shifter (21), the pipeline of described hydro-thermal heat exchanger (26) is connected by by-pass line (30), described bypass solenoid valve (31) is located on described by-pass line (30).
6. a kind of three control multi-online air-conditioning systems according to claim 5, it is characterized in that, described outer machine system (36) 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 (34), 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 (33), 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 (35), the input of described compressor (1) connects the output of gas-liquid separator (32) by pipeline, the input of described gas-liquid separator (32) connects the input of described second off-premises station stop valve (17) by pipeline, the output of described gas-liquid separator (32) also connects described oil eliminator (3) by pipeline.
7. the one three control multi-online air-conditioning system according to claim 5 or 6, 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).
8. the one three control multi-online air-conditioning system according to claim 5 or 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 claim 5 or 6, it is characterized in that, described indoor apparatus of air conditioner system (37) 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 (33) 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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