CN105352035A - Air conditioner and defrosting control method for air conditioner - Google Patents
Air conditioner and defrosting control method for air conditioner Download PDFInfo
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- CN105352035A CN105352035A CN201510772744.XA CN201510772744A CN105352035A CN 105352035 A CN105352035 A CN 105352035A CN 201510772744 A CN201510772744 A CN 201510772744A CN 105352035 A CN105352035 A CN 105352035A
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- 238000010257 thawing Methods 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 74
- 238000010438 heat treatment Methods 0.000 claims abstract description 88
- 239000003507 refrigerant Substances 0.000 claims description 42
- 238000005057 refrigeration Methods 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 description 12
- 230000008020 evaporation Effects 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 12
- 230000005494 condensation Effects 0.000 description 11
- 238000009833 condensation Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/65—Electronic processing for selecting an operating mode
Abstract
The invention discloses an air conditioner which comprises a first heat exchanger, a second heat exchanger, a four-way valve and a compressor. The air conditioner further comprises a first valve, a second valve, a third valve and a fourth valve. The compressor comprises a first exhaust branch, a second exhaust branch and a third exhaust branch. The first exhaust branch is connected to the four-way valve. The first heat exchanger comprises a first heat exchange pipe and a second heat exchange pipe. A first connector of the first heat exchanger is connected to the third exhaust branch through the second valve and connected to a first connector of the second heat exchanger through the fourth valve. A first connector of the second heat exchange pipe is connected to the second exhaust branch through the first valve and connected to the first connector of the second heat exchanger through the third valve. The invention further provides a defrosting control method for the air conditioner. By the adoption of the air conditioner and the defrosting control method for the air conditioner, the technical problem that the heating efficiency is low when the air conditioner is defrosted is solved.
Description
Technical field
The present invention relates to air-conditioner technical field, particularly relate to a kind of air-conditioner and air-conditioner defrosting control method.
Background technology
In the heating process of air-conditioning system, when outdoor heat exchanger surface temperature is lower than 0 DEG C, and during frost point temperature lower than air, the steam meeting condensation frosting on outdoor heat exchanger surface, affect the heat transfer effect of outdoor heat exchanger, along with increasing of frost layer, the heating effect of indoor heat exchanger declines, and leaving air temp reduces.Therefore, need the frost layer removed on outdoor heat exchanger, guarantee heating effect.
Existing Defrost mode, elder generation is out of service to be heated, if still can not remove clean frost, be converted to refrigeration mode, now high temperature refrigerant condensation heat release within the condenser, the frost in condenser melts by heat, but, in defrost process, air-conditioning no longer carries out heating running, and contrary air conditioner room unit heat exchanger also can siphon away partial heat indoor, cause indoor temperature to reduce, reduce the heating efficiency of air-conditioner.
Summary of the invention
The invention provides a kind of air-conditioner and air-conditioner defrosting control method, its main purpose is to solve air-conditioner when defrosting, the technical problem that heating efficiency is low.
For achieving the above object, the invention provides a kind of air-conditioner, described air-conditioner comprises First Heat Exchanger, second heat exchanger, cross valve and compressor, described air-conditioner also comprises the first valve, second valve, 3rd valve and the 4th valve, described compressor comprises the first exhaust branch road, second exhaust branch road and the 3rd exhaust branch road, described first exhaust branch road is connected to described cross valve, described First Heat Exchanger comprises the first heat exchanger tube and the second heat exchanger tube, the first interface of described first heat exchanger tube is connected to described 3rd exhaust branch road through described second valve, described 4th valve is connected to the first interface of described second heat exchanger, the first interface of described second heat exchanger tube is connected to described second exhaust branch road through described first valve, the first interface of described second heat exchanger is connected to through described 3rd valve.
Preferably, described air-conditioner also comprises the 5th valve and the 6th valve, and the first interface of described first heat exchanger tube is connected to the second interface of described second heat exchanger tube through described 5th valve, and the second interface of described second heat exchanger tube is connected to described cross valve through described 6th valve.
Preferably, described air-conditioner also comprises the first temperature-detecting device be arranged on described first heat exchanger tube, and is arranged on the second temperature-detecting device on described second heat exchanger tube.
For achieving the above object, the present invention also provides a kind of air-conditioner defrosting control method, and this air-conditioner defrosting control method comprises:
When described air-conditioner is heating mode, the temperature that each temperature-detecting device of Real-time Obtaining detects;
When detecting that the temperature of described heat exchanger tube is less than the first preset temperature, judge whether other heat exchanger tubes except described heat exchanger tube are in heating mode;
When detected described heat exchanger tube be in heating mode run time, control the heat exchanger tube that described temperature is less than the first preset temperature and enter defrosting mode.
Preferably, described when detected described heat exchanger tube be in heating mode run time, control after heat exchanger tube that described temperature is less than the first preset temperature enters the step of defrosting mode, described air-conditioner defrosting control method also comprises:
When detecting that the temperature of the described heat exchanger tube being in defrosting mode is greater than the second preset temperature, controlling described heat exchanger tube and exiting defrosting mode, wherein, described second preset temperature is greater than described first preset temperature.
Preferably, when described air-conditioner is heating mode, after the step of the temperature that Real-time Obtaining temperature-detecting device detects, described air-conditioner defrosting control method also comprises:
When detecting that the temperature of all heat exchanger tubes is all less than the first preset temperature, the heat exchanger tube controlling preset number enters defrosting mode and defrosts, and wherein, described preset number is less than the total number of heat exchanger tube.
Preferably, when described air-conditioner is heating mode, after the step of the temperature of the heat exchanger tube that Real-time Obtaining temperature-detecting device detects, described air-conditioner defrosting control method also comprises:
When the temperature that described first temperature-detecting device detects is less than the first preset temperature and described second heat exchanger tube is heating mode, controls described second valve unlatching, described 4th valve closedown, enter described first heat exchanger tube heat release to make refrigerant and defrost;
When the temperature that described second temperature-detecting device detects is less than the first preset temperature and described first heat exchanger tube is heating mode, controls described first valve unlatching, described 3rd valve closedown, enter described second heat exchanger tube heat release to make refrigerant and defrost.
Preferably, described second valve of described control is opened, described 4th valve cuts out, and enter after described first heat exchanger tube heat release carries out the step defrosted to make refrigerant, described air-conditioner defrosting control method also comprises:
When the temperature that described first temperature-detecting device detects is greater than the second preset temperature, controls described second valve closedown, described 4th valve unlatching, recover heating mode to make described first heat exchanger tube;
Described first valve of described control is opened, described 3rd valve cuts out, and enter after described second heat exchanger tube heat release carries out the step defrosted to make refrigerant, described air-conditioner defrosting control method also comprises:
When the temperature that described second temperature-detecting device detects is greater than the second preset temperature, controls described first valve closedown, described 3rd valve unlatching, recover heating mode to make described second heat exchanger tube.
Preferably, when described air-conditioner is heating mode, before the step of the temperature that Real-time Obtaining temperature-detecting device detects, described air-conditioner defrosting control method also comprises:
When receiving heating operation instruction, controlling described 3rd valve, described 4th valve and described 6th valve and being in opening, control described first valve, described second valve and described 5th valve and be in closed condition, enter heating mode to make described air-conditioner and run.
Preferably, described air-conditioner defrosting control method also comprises:
When receiving refrigerating operaton instruction, controlling described 3rd valve and described 5th valve is in opening, controlling described first valve, described second valve, described 4th valve and described 6th valve and being in closed condition, enter refrigeration mode to make described air-conditioner and run.
The air-conditioner that the present invention proposes and air-conditioner defrosting control method, first heat exchanger tube and the second heat exchanger tube are set in First Heat Exchanger, and on two branch roads, be provided with multiple valve to realize the adjustment that in loop, refrigerant flows to, and then realize when defrosting for the first heat exchanger tube, second heat exchanger tube still can according to being in conventional evaporation process, continue as indoor to heat, same, when defrosting for the second heat exchanger tube, first heat exchanger tube still can according to being in conventional evaporation process, continue as indoor to heat, improve the heating efficiency of air-conditioner when defrosting.
Accompanying drawing explanation
Fig. 1 is the syndeton schematic diagram of air-conditioner preferred embodiment of the present invention;
Fig. 2 is the flow chart of air-conditioner defrosting control method first embodiment of the present invention;
Fig. 3 is the flow chart of air-conditioner defrosting control method second embodiment of the present invention;
Fig. 4 is the flow chart of air-conditioner defrosting control method the 3rd embodiment of the present invention;
Fig. 5 is the flow chart of air-conditioner defrosting control method the 4th embodiment of the present invention;
Fig. 6 is the flow chart of air-conditioner defrosting control method the 5th embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of air-conditioner, with reference to shown in Fig. 1, is the syndeton schematic diagram of air-conditioner preferred embodiment of the present invention.
In the present embodiment, air-conditioner 100 comprises compressor 10, First Heat Exchanger 20, second heat exchanger 30 and cross valve 40, air-conditioner 100 also comprises the first valve 51, second valve 52, 3rd valve 53 and the 4th valve 54, compressor 10 comprises the first exhaust branch road 11, second exhaust branch road 12 and the 3rd exhaust branch road 13, first exhaust branch road 11 is connected to cross valve 40, First Heat Exchanger 20 comprises the first heat exchanger tube 21 and the second heat exchanger tube 22, the first interface 211 of the first heat exchanger tube 21 is connected to the 3rd exhaust branch road 13 through the second valve 52, the first interface 31 of the second heat exchanger 30 is connected to through the 4th valve 54, the first interface 221 of the second heat exchanger tube 22 is connected to the second exhaust branch road 12 through the first valve 51, the first interface 31 of the second heat exchanger 30 is connected to through the 3rd valve 53.
The air-conditioner 100 that the present embodiment proposes, First Heat Exchanger 20 is positioned at outdoor, and the second heat exchanger 30 is positioned at indoor.When heating operation, First Heat Exchanger 20 is as evaporator refrigeration, and the second heat exchanger 30 heats as condenser, and when refrigerating operaton, First Heat Exchanger 20 heats as condenser, and the second heat exchanger 30 is as evaporator refrigeration.The first heat exchanger tube 21 and the second heat exchanger tube 22 is provided with in First Heat Exchanger 20, and the first exhaust branch road 11, second is set at exhaust outlet 14 place of compressor 10 and is vented branch road 12 and the 3rd exhaust branch road 13, respectively by the first valve 51 and the second valve 52, second exhaust branch road 12 and the 3rd exhaust branch road 13 are connected to the second heat exchanger tube 22 and the first heat exchanger tube 21 of First Heat Exchanger 20, meanwhile, the second heat exchanger tube 22 of First Heat Exchanger 20 and the first heat exchanger tube 21 are also connected to the first interface 31 of the second heat exchanger respectively by the 3rd valve 53 and the 4th valve 54.Like this, during heating operation, in First Heat Exchanger 20, form two branch roads, i.e. the first heat exchanger tube 21 and the second heat exchanger tube 22, and can according to needing the source controlling refrigerant.When heating, 3rd valve 53 and the 4th valve 54 are opened, in compressor, the gaseous coolant of HTHP becomes the liquid refrigerants of HTHP after entering the second heat exchanger 30 condensation heat release, after expansion valve (for not marking in figure), becoming the liquid refrigerants of low-temp low-pressure, entering the second heat exchanger tube 22 and the first heat exchanger tube 21 evaporation endothermic respectively from the 3rd valve 53 and the 4th valve 54.In the heating process of air-conditioner 100, if desired for the first heat exchanger tube 21 of off-premises station defrost time, the second valve 52 can be controlled open, 4th valve 54 cuts out, first heat exchanger tube 21 is defrosted, do not affect the second heat exchanger tube to continue to make indoor set continue as condenser as evaporator refrigeration to be indoor heating, now, the HTHP refrigerant of compressor 10 enters the first heat exchanger tube 21 through the 3rd exhaust branch road 13 and carries out condensation heat release, the pipe temperature of the first heat exchanger tube 21 rises rapidly, by the heat exchange of pipeline, the frost layer outside fin and pipeline is melted, meanwhile, second heat exchanger tube 22 is still in conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and is continuously indoor and heats, do not affect the use of user.For the defrosting of the second heat exchanger tube 22, principle is the same, repeats no more.
Further, air-conditioner 100 also comprises the 5th valve 55 and the 6th valve 56, the first interface 211 of the first heat exchanger tube 21 is connected to the second interface 222, second heat exchanger tube 22 of the second heat exchanger tube 22 the second interface 222 through the 5th valve 55 is connected to cross valve 40 through the 6th valve 56.In the present embodiment, the first valve 51, second valve 52, the 3rd valve 53, the 4th valve 54, the 5th valve 55 and the 6th valve 56 are preferably magnetic valve.
First Heat Exchanger 20 due to the air-conditioner 100 in the present invention is provided with two branch roads, therefore, when heating mode and refrigeration mode time, the flow direction of refrigerant is not identical with loop, when receiving heating operation instruction, control the 3rd valve 53, 4th valve 54 and the 6th valve 56 are in opening, control the first valve 51, two valves 52 and the 5th valve 55 are in closed condition, heating loop with connection makes air-conditioner enter heating mode operation, the gaseous coolant of HTHP is discharged to the first exhaust branch road 11 by compressor, by arriving the second heat exchanger 30 after cross valve 40, the first interface of First Heat Exchanger 20 is reached by becoming the liquid refrigerant of HTHP after the second heat exchanger 30 exothermic condensation.Because the 3rd valve 53, the 4th valve 54 are opened, now refrigerant is divided into two-way to enter the second heat exchanger tube 22 and the first heat exchanger tube 21 respectively by the 3rd valve 53 and the 4th valve 54.The refrigerant evaporated by two-way heat exchanger tube is flowed out from the second interface 222 of the first heat exchanger tube 21 second interface 212, second heat exchanger tube 22 respectively, carries out next one circulation after accumulating a road by getting back to after cross valve 40 in compressor 10.
When refrigerating operaton, 3rd valve 53 and the 5th valve 55 are in opening, first valve 51, second valve 52, the 4th valve 54 and the 6th valve 56 are in closed condition, refrigerant is from after the second interface 212 of the first heat exchanger tube 21 enters First Heat Exchanger 20, flow out from the first interface 211 of the first heat exchanger tube 21, enter the second heat exchanger tube 22 through the 5th valve 55 again, then flow out First Heat Exchanger 20, enter to return in compressor 10 after the second heat exchanger 30 evaporation endothermic through the 3rd valve 53 and carry out next one and circulate.
Further, air-conditioner 100 also comprises the first temperature-detecting device be arranged on described first heat exchanger tube 21, and the second temperature-detecting device be arranged on described second heat exchanger tube 22, first temperature-detecting device and the second temperature-detecting device are for detecting the temperature of the first heat exchanger tube 21 and the second heat exchanger tube 22, to judge whether that needs carry out defrosting or whether exiting defrosting mode, in the present embodiment, temperature-detecting device can be preferably temperature-sensitive bag, in other embodiments, also temperature sensor can be adopted.
And, when the operational mode of air-conditioner 100 is heating mode, the gaseous coolant of HTHP is discharged to the first exhaust branch road 11 by compressor 10, by arriving the second heat exchanger 30 after cross valve 40, by becoming the liquid refrigerant of HTHP after the second heat exchanger 30 exothermic condensation, the liquid refrigerants becoming low-temp low-pressure after expansion valve arrives First Heat Exchanger 20, now, 3rd valve 53 and the 4th valve 54 are opening, and refrigerant is divided into two-way to enter the second heat exchanger tube 22 and the first heat exchanger tube 21 respectively by the 3rd valve 53 and the 4th valve 54.The refrigerant of low-temp low-pressure is divided into two-way evaporation to shorten flow process, thus reduces the resistance of refrigerant in pipeline, improves heating effect, heats the speed of frosting under effectively slow down low temperature.
Be understandable that, in other embodiments, the branch road heat exchanger tube of more than three or three can be set for the First Heat Exchanger 20 i.e. outdoor heat exchanger of air-conditioner, the resistance of further reduction refrigerant in pipeline, improve heating effect and under slowing down low temperature, heat the speed of frosting, and for each branch road arranges valve, switch between heating mode and defrosting mode for controlling brancher.
The air-conditioner 100 that the present embodiment proposes, first heat exchanger tube 21 and the second heat exchanger tube 22 is set in First Heat Exchanger 20, and on two branch roads, be provided with multiple valve to realize the adjustment that in loop, refrigerant flows to, and then realize when defrosting for the first heat exchanger tube 21, second heat exchanger tube 22 is still in conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and continues as indoor and heat, same, when defrosting for the second heat exchanger tube 22, first heat exchanger tube 21 still can according to being in conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and continues as indoor and heat, run without the need to air-conditioner 100 being switched to refrigeration mode and can realize defrosting, do not affect the use of user.
Based on above-mentioned air-conditioner 100, the present invention also provides a kind of air-conditioner defrosting control method.
With reference to shown in Fig. 2, it is the flow chart of air-conditioner defrosting control method first embodiment of the present invention.
In a first embodiment, this air-conditioner defrosting control method comprises:
Step S10, when described air-conditioner is heating mode, the temperature that Real-time Obtaining temperature-detecting device detects.
The air-conditioner defrosting control method that the present embodiment proposes does not limit the quantity of heat exchanger tube in First Heat Exchanger, may be used for the air-conditioner being provided with two or more heat exchanger tube branch roads, for each the branch road heat exchanger tube set temperature checkout gear in First Heat Exchanger, to judge that this branch road heat exchanger tube defrosts the need of carrying out and whether defrosted.In the present embodiment, when detecting that air-conditioner 100 enters heating mode, the temperature that timing acquisition temperature-detecting device detects, to judge that according to the temperature that gets heat exchanger tube that this temperature-detecting device is corresponding is the need of defrosting.
Step S20, when detecting that the temperature of described heat exchanger tube is less than the first preset temperature, judges whether other heat exchanger tubes except described heat exchanger tube are in heating mode.
Step S30, when detected described heat exchanger tube be in heating mode run time, control the heat exchanger tube that described temperature is less than the first preset temperature and enter defrosting mode.
When the temperature that one or more temperature-detecting device detects is less than the first preset temperature, illustrate that the heat exchanger tube that temperature-detecting device is corresponding needs to defrost, now, indoor set in order to ensure air-conditioner 100 still can normally heat, need to judge whether have heat exchanger tube to be normal heating mode in other heat exchanger tubes except the heat exchanger tube that temperature is less than the first preset temperature, be normal heating mode when there being heat exchanger tube, the normal use of indoor set can be ensured, now, these temperature can be controlled be less than the first preset temperature and need the heat exchanger tube defrosted to enter defrosting mode and defrost, wherein, first preset temperature is preferably-3 DEG C--and 6 DEG C.
Carry out defrosting can have numerous embodiments about the above-mentioned defrosting mode that enters, below enumerate two kinds of modes: in one embodiment, the heat exchanger tube branch road that valve on these branch roads needs to disconnect these temperature and be less than the first preset temperature to defrost can be closed, namely the heating operation of this branch road is stopped, until the frost layer outside heat exchanger tube melts.In another embodiment, by the flow direction of valve regulated refrigerant, HTHP refrigerant in compressor can be made directly to enter this branch road and to carry out condensation heat release, the frost layer outside heat exchanger tube is melted fast.
Be understandable that, when judging whether other heat exchanger tubes except described heat exchanger tube are in heating mode, the methods such as the variation tendency of temperature in certain time length that can be detected by the detection opening of valve, the flow direction of refrigerant or temperature-detecting device are judged.
It should be noted that, the air-conditioner 100 of the present embodiment has the multiple method exiting defrosting mode, below enumerate two kinds of modes: in one embodiment, the preset temperature value that the temperature of the heat exchanger tube under defrosting mode reaches certain can detected, control it and exit defrosting mode, above-mentioned preset temperature value can experimentally obtain certain number range; In another embodiment, can control the operation duration backed off after random defrosting mode of defrosting mode, this operation duration also can experimentally obtain, and namely after certain time length, the frost layer outside this heat exchanger tube can melt, and can recover normal heating mode and run.
The air-conditioner defrosting control method that the present embodiment proposes, when having detected that heat exchanger tube temperature needs to defrost lower than the first preset temperature, judge whether that the heat exchanger tube that temperature is more than or equal to the first preset temperature is heating mode, if had, normally heating of indoor set can be ensured, then control temperature enters defrosting mode lower than the heat exchanger tube branch road of the first preset temperature, while ensure that defrosting, indoor continues to heat, running without the need to air-conditioner 100 being switched to refrigeration mode and can realize defrosting, improve the heating efficiency of air-conditioner when defrosting.
With reference to shown in Fig. 3, the first embodiment based on invention air-conditioner defrosting control method proposes the second embodiment of air-conditioner defrosting control method of the present invention.In the present embodiment, the difference of described method and the first embodiment is, after step S30, this air-conditioner defrosting control method also comprises:
Step S40, when detecting that the temperature of the described heat exchanger tube being in defrosting mode is greater than the second preset temperature, controlling described heat exchanger tube and exiting defrosting mode, and wherein, described second preset temperature is greater than described first preset temperature.
Although when some heat exchanger tubes defrost, when still having other heat exchanger tubes to be in normal heating mode, ensure that heating of indoor set, but heating capacity is now less relative to the heating capacity all heated when pipe all normally heats, therefore, in order to recover normally heating of air-conditioner whole system, and in order to need the heat exchanger tube of defrosting to defrost to other, when detecting that the temperature of the heat exchanger tube being in defrosting mode is greater than the second preset temperature, wherein, second preset temperature is preferably 24 DEG C-27 DEG C, control heat exchanger tube and exit defrosting mode, return to normal heating mode.
The air-conditioner defrosting control method that the present embodiment proposes, when the temperature return of heat exchanger tube being detected to higher temperature, judge that frost layer melts, defrosting completes, and can exit defrosting mode by controller in time, return to normal heating mode.
With reference to shown in Fig. 4, the first embodiment based on invention air-conditioner defrosting control method proposes the 3rd embodiment of air-conditioner defrosting control method of the present invention.In the present embodiment, the difference of described method and the first embodiment is, after step slo, this air-conditioner defrosting control method also comprises:
Step S50, when detecting that the temperature of all heat exchanger tubes is all less than the first preset temperature, the heat exchanger tube controlling preset number enters defrosting mode and defrosts, and wherein, described preset number is less than the total number of heat exchanger tube.
If detect that the temperature of all heat exchanger tubes of First Heat Exchanger 20 is all less than the first preset temperature simultaneously, now, air-conditioner can be selected the heat exchanger tube of some to enter defrosting mode to defrost in whole heat exchanger tube, other heat exchanger tube continues to run with heating mode, to ensure normally heating of indoor set; Wherein, preset number is less than the sum of heat exchanger tube in First Heat Exchanger 20, and air-conditioner can Stochastic choice, also can select from top to bottom or from left to right according to the erection sequence of heat exchanger tube.
If in order to preferentially ensure heating of indoor, this preset number can be less, a heat exchanger tube is such as selected first to defrost, if in order to ensure preferential defrosting, a heat exchanger tube then can be only stayed to continue to run heating mode, other heat exchanger tube all enters defrosting mode, and this number also can be pre-set by user.
The air-conditioner defrosting control method that the present embodiment proposes, when the temperature of all heat exchanger tubes is all less than the first preset temperature, selects the heat exchanger tube of some to defrost, to ensure that indoor set normally heats.
Shown in Fig. 5, the 4th embodiment of air-conditioner defrosting control method of the present invention is proposed based on the first embodiment of invention air-conditioner defrosting control method, the second embodiment or the 3rd embodiment.In the present embodiment, the First Heat Exchanger 20 of air-conditioner 100 comprises the first heat exchanger tube 21 and the second heat exchanger tube 22, and after step slo, the method also comprises:
Step S60, when the temperature that described first temperature-detecting device detects is less than the first preset temperature and described second heat exchanger tube is heating mode, control described second valve unlatching, described 4th valve closedown, enter described first heat exchanger tube condensation heat release to make refrigerant and defrost.
When the first temperature-detecting device detects that the temperature of the first heat exchanger tube 21 is less than the first preset temperature, illustrate that the first heat exchanger tube 21 needs defrosting, indoor set now in order to ensure air-conditioner 100 still can normally heat, need to judge whether the second heat exchanger tube 22 is normal heating mode, the present embodiment is by judging that the 3rd valve 53 judges that the second heat exchanger tube is normal heating mode as opening, in other embodiments, also can by judging that the first valve 51 is as closed condition and the 3rd valve 53 judges that the second heat exchanger tube 22 is as normal heating mode for opening, now, open by controlling the second valve 52, 4th valve 54 cuts out, enter the first heat exchanger tube 21 condensation heat release to make HTHP refrigerant to defrost.
Further, in other embodiments, when the constant temperature that described first temperature-detecting device detects in preset duration is less than the first preset temperature and described second heat exchanger tube is heating mode, control described second valve unlatching, described 4th valve closedown, enter described first heat exchanger tube heat release to make refrigerant and defrost.
In order to avoid temperature-detecting device impact by outdoor environment when detected temperatures, the temperature regime that preset duration carries out judging to judge First Heat Exchanger 20 is more exactly set, if the constant temperature detected in preset duration is lower than the first preset temperature, the temperature of the first heat exchanger tube 21 so now detected is more stable, can judge that needs defrost.
Further, through refrigerant after a while after condensation heat release in the first heat exchanger tube 21, first temperature-detecting device can detect that constant temperature rises, when detecting that temperature is greater than the second preset temperature, control that the second valve 52 cuts out, the 4th valve 54 is opened to make the first heat exchanger tube 21 exit defrosting mode, be switched to normal heating mode, to ensure indoor set heating capacity.Wherein, above-mentioned first preset temperature and the second preset temperature can be arranged according to the demand of the actual motion environment of air-conditioning and user, or experimentally record suitable temperature range, in the present embodiment, first preset temperature is preferably-3 DEG C--and 6 DEG C, the second preset temperature is preferably 24 DEG C-27 DEG C.
When the temperature that described second temperature-detecting device detects is less than the first preset temperature and described first heat exchanger tube is heating mode, controls described first valve unlatching, described 3rd valve closedown, enter described second heat exchanger tube heat release to make refrigerant and defrost.
When the temperature that described second temperature-detecting device detects is greater than the second preset temperature, control described first valve closedown, described 3rd valve unlatching.
Defrosting identical for process when the second heat exchanger tube 22 defrosts and principle with the first heat exchanger tube 21, do not repeat them here.Just when defrosting for the second heat exchanger tube 22, opening by controlling the first valve 51, the 3rd valve 53 cuts out and realize.
Be understandable that, the present invention may be used for the air-conditioner arranging more than three or three heat exchanger tubes equally, each branch road arranges valve and switches between defrosting mode and normal heating mode for controlling brancher.And multiple branch road is set can reduces the resistance of refrigerant in pipeline further, improve heating effect and under slowing down low temperature, heat the speed of frosting.
The air-conditioner defrosting control method that the present embodiment proposes, when detecting that the lower needs of heat exchanger tube temperature defrost, by regulating the valve on two branch roads of First Heat Exchanger 20, realize when defrosting for the first heat exchanger tube 21, second heat exchanger tube 22 is still in conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and continues as indoor and heat, same, when defrosting for the second heat exchanger tube 22, first heat exchanger tube 21 still can according to being in conventional evaporation process, therefore the second heat exchanger 30 still can be used as condenser and continues as indoor and heat, improve the heating efficiency of air-conditioner when defrosting.
With reference to shown in Fig. 6, the 4th embodiment based on invention air-conditioner defrosting control method proposes the second embodiment of air-conditioner defrosting control method of the present invention.In the present embodiment, the difference of described method and the 4th embodiment is, before step S10, this air-conditioner defrosting control method also comprises:
Step S70, when receiving heating operation instruction, control described 3rd valve, described 4th valve and described 6th valve and be in opening, control described first valve, described second valve and described 5th valve and be in closed condition, enter heating mode to make described air-conditioner and run.
First Heat Exchanger 20 due to the air-conditioner 100 in the present invention is provided with two branch roads, therefore, when heating mode and refrigeration mode time, the flow direction of refrigerant is not identical with loop, when receiving heating operation instruction, control the 3rd valve 53, 4th valve 54 and the 6th valve 56 are in opening, control the first valve 51, two valves 52 and the 5th valve 55 are in closed condition, heating loop with connection makes air-conditioner enter heating mode operation, the gaseous coolant of HTHP is discharged to the first exhaust branch road 11 by compressor, by arriving the second heat exchanger 30 after cross valve 40, the first interface of First Heat Exchanger 20 is reached by becoming the liquid refrigerant of HTHP after the second heat exchanger 30 exothermic condensation.Because the 3rd valve 53, the 4th valve 54 are opened, now refrigerant is divided into two-way to enter the second heat exchanger tube 22 and the first heat exchanger tube 21 respectively by the 3rd valve 53 and the 4th valve 54.The refrigerant evaporated by two-way heat exchanger tube is flowed out from the second interface 222 of the first heat exchanger tube 21 second interface 212, second heat exchanger tube 22 respectively.Next one circulation is carried out by getting back to after cross valve 40 in compressor 10 after accumulating a road.
Further, when receiving refrigerating operaton instruction, control described 3rd valve and described 5th valve is in opening, control described first valve, described second valve, described 3rd valve and described 6th valve and be in closed condition, enter refrigeration mode to make described air-conditioner and run.
When refrigerating operaton, 3rd valve 53 and the 5th valve 55 are in opening, first valve 51, second valve 52, the 4th valve 54 and the 6th valve 56 are in closed condition, refrigerant is from after the second interface 212 of the first heat exchanger tube 21 enters First Heat Exchanger 20, flow out from the first interface 211 of the first heat exchanger tube 21, enter the second heat exchanger tube 22 through the 5th valve 55 again, then flow out First Heat Exchanger 20, enter to return in compressor 10 after the second heat exchanger 30 evaporation endothermic through the 3rd valve 53 and carry out next one and circulate.
The air-conditioner defrosting control method that the present embodiment proposes, after the second heat exchanger 30, the refrigerant of low-temp low-pressure is divided into two-way evaporation to shorten flow process, thus reduces the resistance of refrigerant in pipeline, improve heating effect, under effectively slow down low temperature, heat the speed of frosting.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. an air-conditioner, comprises First Heat Exchanger, the second heat exchanger, cross valve and compressor, it is characterized in that:
Described air-conditioner also comprises the first valve, the second valve, the 3rd valve and the 4th valve;
Described compressor comprises the first exhaust branch road, the second exhaust branch road and the 3rd exhaust branch road, and described first exhaust branch road is connected to described cross valve;
Described First Heat Exchanger comprises the first heat exchanger tube and the second heat exchanger tube, the first interface of described first heat exchanger tube is connected to described 3rd exhaust branch road through described second valve, is connected to the first interface of described second heat exchanger through described 4th valve, and the first interface of described second heat exchanger tube is connected to described second exhaust branch road through described first valve, is connected to the first interface of described second heat exchanger through described 3rd valve.
2. air-conditioner according to claim 1, it is characterized in that, described air-conditioner also comprises the 5th valve and the 6th valve, the first interface of described first heat exchanger tube is connected to the second interface of described second heat exchanger tube through described 5th valve, the second interface of described second heat exchanger tube is connected to described cross valve through described 6th valve.
3. air-conditioner according to claim 1, is characterized in that, described air-conditioner also comprises the first temperature-detecting device be arranged on described first heat exchanger tube, and is arranged on the second temperature-detecting device on described second heat exchanger tube.
4. an air-conditioner defrosting control method, is characterized in that, described air-conditioner is air-conditioner according to claim 3, and described air-conditioner defrosting control method comprises:
When described air-conditioner is heating mode, the temperature that each temperature-detecting device of Real-time Obtaining detects;
When detecting that the temperature of described heat exchanger tube is less than the first preset temperature, judge whether other heat exchanger tubes except described heat exchanger tube are in heating mode;
When detected described heat exchanger tube be in heating mode run time, control the heat exchanger tube that described temperature is less than the first preset temperature and enter defrosting mode.
5. air-conditioner defrosting control method according to claim 4, it is characterized in that, described when having detected that described heat exchanger tube is in heating mode operation, control after heat exchanger tube that described temperature is less than the first preset temperature enters the step of defrosting mode, described air-conditioner defrosting control method also comprises:
When detecting that the temperature of the described heat exchanger tube being in defrosting mode is greater than the second preset temperature, controlling described heat exchanger tube and exiting defrosting mode, wherein, described second preset temperature is greater than described first preset temperature.
6. air-conditioner defrosting control method according to claim 4, is characterized in that, when described air-conditioner is heating mode, after the step of the temperature that Real-time Obtaining temperature-detecting device detects, described air-conditioner defrosting control method also comprises:
When detecting that the temperature of all heat exchanger tubes is all less than the first preset temperature, the heat exchanger tube controlling preset number enters defrosting mode and defrosts, and wherein, described preset number is less than the total number of heat exchanger tube.
7. air-conditioner defrosting control method according to claim 5, is characterized in that, when described air-conditioner is heating mode, after the step of the temperature of the heat exchanger tube that Real-time Obtaining temperature-detecting device detects, described air-conditioner defrosting control method also comprises:
When the temperature that described first temperature-detecting device detects is less than the first preset temperature and described second heat exchanger tube is heating mode, controls described second valve unlatching, described 4th valve closedown, enter described first heat exchanger tube heat release to make refrigerant and defrost;
When the temperature that described second temperature-detecting device detects is less than the first preset temperature and described first heat exchanger tube is heating mode, controls described first valve unlatching, described 3rd valve closedown, enter described second heat exchanger tube heat release to make refrigerant and defrost.
8. air-conditioner defrosting control method according to claim 7, it is characterized in that, described second valve of described control is opened, described 4th valve cuts out, and enter after described first heat exchanger tube heat release carries out the step defrosted to make refrigerant, described air-conditioner defrosting control method also comprises:
When the temperature that described first temperature-detecting device detects is greater than the second preset temperature, controls described second valve closedown, described 4th valve unlatching, recover heating mode to make described first heat exchanger tube;
Described first valve of described control is opened, described 3rd valve cuts out, and enter after described second heat exchanger tube heat release carries out the step defrosted to make refrigerant, described air-conditioner defrosting control method also comprises:
When the temperature that described second temperature-detecting device detects is greater than the second preset temperature, controls described first valve closedown, described 3rd valve unlatching, recover heating mode to make described second heat exchanger tube.
9. air-conditioner defrosting control method according to claim 7, is characterized in that, when described air-conditioner is heating mode, before the step of the temperature that Real-time Obtaining temperature-detecting device detects, described air-conditioner defrosting control method also comprises:
When receiving heating operation instruction, controlling described 3rd valve, described 4th valve and described 6th valve and being in opening, control described first valve, described second valve and described 5th valve and be in closed condition, enter heating mode to make described air-conditioner and run.
10. air-conditioner defrosting control method according to claim 7, is characterized in that, described air-conditioner defrosting control method also comprises:
When receiving refrigerating operaton instruction, controlling described 3rd valve and described 5th valve is in opening, controlling described first valve, described second valve, described 4th valve and described 6th valve and being in closed condition, enter refrigeration mode to make described air-conditioner and run.
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| CN107401851A (en) * | 2017-09-08 | 2017-11-28 | 海信（广东）空调有限公司 | Air-conditioner system and air-conditioner system do not shut down the control method of defrosting |
| CN110332653A (en) * | 2019-07-10 | 2019-10-15 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method, device and equipment |
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