CN100510583C - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN100510583C CN100510583C CNB2007101403531A CN200710140353A CN100510583C CN 100510583 C CN100510583 C CN 100510583C CN B2007101403531 A CNB2007101403531 A CN B2007101403531A CN 200710140353 A CN200710140353 A CN 200710140353A CN 100510583 C CN100510583 C CN 100510583C
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- defrosting
- heat exchanger
- running
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- heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/025—Motor control arrangements
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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
- F25B13/00—Compression machines, plants or systems, with reversible 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
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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 air conditioner of the invention can simultaneously do defrosting and heat producing to ensure the indoor comfort and shorten the defrosting time. The air conditioner is provided with a refrigerant tubing connected compressor, a four-way valve, an indoor heat exchanger, a decompressor and an outdoor heat exchanger to form a refrigerating cycle, and the air conditioner is arranged with a by-pass loop which circulates hot gas from the discharging side of the compressor to the outdoor heat exchanger. The refrigerant loop of the outdoor heat exchanger is divided into two parts of an upper part and a lower part to compose a lower heat exchanger and an upper heat exchanger which is larger than the lower heat exchanger. The control device contrarily does switch to the main loop switch mechanism and by-pass switch valve thereby doing heat producing with the lower heat exchanger while the defrosting is done to the upper heat exchanger in the defrosting and heat producing operation, and then doing heat producing with the upper heat exchanger while the defrosting is done to the lower heat exchanger.
Description
Technical field
The present invention relates to air conditioner, be particularly suited for carrying out simultaneously the defrosting of outdoor heat converter and the air conditioner of indoor heating.
Background technology
When the air heat source and thermal pump air conditioner heats running, if the humidity height of outdoor air then produces frosting on outdoor heat converter.If the generation frosting then ventilating duct of outdoor heat converter narrows down, therefore the amount of the outdoor air that circulates in outdoor heat converter reduces.If the amount of the outdoor air of circulation reduces, then heat exchange amount tails off, and the evaporating temperature of the cold-producing medium that flows in outdoor heat converter is descended.The temperature of cold-producing medium descends then that the surface temperature of the outer gas side of outdoor heat converter also descends, and more is easy to generate frosting, and frosting further develops.Just reduce from the heat that outdoor air sucks with outdoor heat converter in this case, therefore the heat that sheds from indoor heat converter also reduces and heating capacity is also descended, thereby indoor comfort is impaired.In order to prevent this situation, when the amount of the frosting of outdoor heat converter surpasses the amount of regulation, melt the frosting of outdoor heat converter, and it is flowed down outside machine discharge by the running that defrosts.
As the Defrost mode known to extensively in the past the reverse cycle defrosting mode is arranged.This mode needs the occasion that defrosts in heating running, kind of refrigeration cycle is converted to kind of refrigeration cycle, and compressor, indoor set as thermal source, are made from the high-temperature gas refrigerant flow direction outdoor heat converter of compressor and defrost.
In addition, as the air conditioner that carries out the defrosting of outdoor heat converter when carrying out indoor heating, known spy opens that flat 09-318206 communique (patent documentation 1), spy are opened 2001-059664 communique (patent documentation 2), the spy opens 2002-188873 communique (patent documentation 3) and the spy opens flat 04-110576 communique (patent documentation 4).
A kind of following heat pump type air conditioner is disclosed in patent documentation 1, promptly, outdoor heat converter becomes evaporimeter when heating running, and indoor heat converter becomes condenser and carries out indoor heating, be divided into the outdoor heat converter above-below direction a plurality of, each outdoor heat converter of having cut apart pipe arrangement in parallel is connected on the indoor heat converter, and pipe arrangement is connected the suction oral-lateral of compressor by two-way valve respectively, and discharge oral-lateral branch at compressor, and pipe arrangement is connected on each outdoor heat converter by two-way valve respectively, when when heating running, defrosting, make a part change successively and flow to lower side from upper side to divided each outdoor heat converter, thereby heat simultaneously and defrost from the discharge gas of compressor.
A kind of following air conditioner is disclosed in patent documentation 2, promptly, utilize refrigerant piping to connect compressor, cross valve, indoor heat converter, expansion valve and outdoor heat converter and constitute kind of refrigeration cycle, two row before and after the air-flow of following the rotation of outdoor draft fan relatively and producing is separated into outdoor heat converter, and connect expansion valve and make and in parallelly constitute respectively listing, and when the heating of the discharge side line of compressor and two outdoor heat converters, between the entrance side pipe arrangement bypass that possesses switch valve is set, sets for and can carry out high ability and heat running, low ability heats running and defrosting and heats time running etc.
Disclose a kind of air conditioner in patent documentation 3, this air conditioner possesses: the outdoor heat exchanger that is connected in parallel and is divided into a plurality of heat exchangers and constitutes; The kind of refrigeration cycle that heats running that on this outdoor heat exchanger, connects compressor, cross valve, indoor side heat exchanger and decompressor and constitute; Be used for the bypass that discharge gas that when running will discharge from compressor guides to the oral area of each heat exchanger that becomes inlet respectively that heats at above-mentioned outdoor heat exchanger; The switching mechanism of each outlet of this bypass of switch; Detection is to the testing agency of the frosting of each heat exchanger of outdoor heat exchanger; And come gauge tap mechanism to make from the discharge gas of compressor according to above-mentioned testing result heating when running to mechanism that the heat exchanger of frosting flows into.
A kind of refrigerating plant of air conditioner is disclosed in patent documentation 4, this refrigerating plant pipe arrangement successively connects compressor, runner conversion cross valve, two outdoor heat converters that are connected in parallel, can carry out the decompressor of cold and hot conversion and indoor heat converter and constitute kind of refrigeration cycle, in series pipe arrangement connects two outdoor heat converters and cold, hot two-purpose pressure reducer respectively, and two bypass pipes that possess switch valve from the discharge side branch of compressor respectively, these two bypass pipes are connected on two connecting pipings between pipe arrangement junction chamber outer heat-exchanger and the cold, hot two-purpose pressure reducer, at when running defrosting switch valve of being possessed of each bypass pipe of alternation switch, thereby to the defrosting that hockets of two outdoor heat converters.
The occasion that when the low temperature such as morning of cold, begins to heat running, need before reaching design temperature, room temperature begin to defrost, the air conditioner of above-mentioned reverse cycle defrosting mode, owing to begin to carry out the reverse cycle defrosting running after stopping to heat running, therefore have that temperature descends greatly and makes comfortableness impaired in defrosting, and reach the elongated problem of time of design temperature up to temperature.
In the air conditioner of patent documentation 1,, under the state that heating capacity always descends, carry out the indoor problem that heats so have owing in heating running, often defrost.And, change the defrosting of the least part of the outdoor heat converter that is divided into 3 parts successively, so the elongated problem of defrosting time is arranged.
Air conditioner in patent documentation 2 and the patent documentation 3, owing to being separated into front and back two with outdoor heat converter, relative wind is listed as the defrosting that hockets, so there are the following problems, promptly, the thawing water that is produced by the defrosting of the side in the separated outdoor heat converter can not be used in the thawing of the opposing party's frost, can not defrost with the short time efficiently.
The air conditioner of patent documentation 4, owing to relative wind separates the defrosting that hockets about with outdoor heat converter, so there are the following problems, promptly, the thawing water that is produced by the defrosting of the side in the separated outdoor heat converter can not be used in the thawing of the opposing party's frost, can not defrost with the short time efficiently.
Summary of the invention
The object of the present invention is to provide and a kind ofly can defrost simultaneously and heat and guarantee indoor comfort and shorten the air conditioner of defrosting time.
For achieving the above object, the present invention is a kind of air conditioner, connect compressor with refrigerant piping, cross valve, indoor heat converter, decompressor and outdoor heat converter and constitute kind of refrigeration cycle, above-mentioned outdoor heat converter is divided into two and be connected in parallel, and the major loop switching mechanism is set at the above-mentioned when running entrance side of heating of refrigerant loop that is divided into each outdoor heat converter of two, be provided with the discharge side that connects above-mentioned compressor and above-mentioned be divided into two each outdoor heat converter refrigerant loop heat running the time entrance side hot gas bypass circuit, and the bypass cock valve is set on hot gas bypass circuit, control device with control running, this air conditioner is characterised in that, above-mentioned outdoor heat converter is divided into two up and down by its refrigerant loop, constitute downside heat exchanger and the upside heat exchanger bigger than this downside heat exchanger, above-mentioned control device is controlled as follows: under the occasion that begins to defrost in heating running, above-mentioned major loop switching mechanism and above-mentioned bypass cock valve are carried out switch on the contrary, in the defrosting of carrying out above-mentioned upside heat exchanger is defrosted and heats with above-mentioned downside heat exchanger, heat after the running, carry out defrosting that above-mentioned downside heat exchanger is defrosted and heats with above-mentioned upside heat exchanger, heat running, finishing this defrosting, heat to return after the running and heat running.
This preferred concrete configuration example of the present invention is as follows:
(1) above-mentioned control device makes above-mentioned downside heat exchanger is defrosted and the defrosting that heats with above-mentioned upside heat exchanger, the time that heats running, and the defrosting of comparing that above-mentioned upside heat exchanger defrosts and heating with above-mentioned downside heat exchanger, the time that heats running are also long.
(2) have the compressor of iron and steel system shell, and the temperature degree is to be set at below the numerical value of following formula (1) during defrosting more than 0 ℃ the time is forbidden outside:
The quality of (unit: divide)=8 * compressor during defrosting is forbidden (unit: kg)/caloric receptivity (unit: kW) ... (1) of outdoor heat converter.
(3) be set at 20 minutes during above-mentioned defrosting is forbidden～5 minutes.
(4) above-mentioned control device makes the discharge temperature of above-mentioned compressor carry out movably to high temperature side based on outer gas decrease of temperature, and be controlled to can shorten the defrosting forbid during.
(5) above-mentioned control device is controlled as follows: in defrosting, heat when running than heating the revolution that also reduces outdoor air-supply arrangement when turning round, and stop the running of outdoor air-supply arrangement when the temperature degree turns round than the defrosting under the low occasion of setting outside.
(6) above-mentioned control device is controlled as follows: even also do not reach under the occasion of setting defrosting, heat running to the temperature that reaches the above-mentioned outdoor heat converter defrosting duration of runs, change above-mentioned cross valve and carry out reverse cycle defrosting running.
The present invention has following effect.
According to this air conditioner of the present invention, can defrost simultaneously and heat and guarantee indoor comfort and shorten defrosting time.
Description of drawings
Fig. 1 is the pie graph of the air conditioner of one embodiment of the present of invention.
Fig. 2 is the kind of refrigeration cycle pie graph of the air conditioner of Fig. 1.
The humid air line chart of the variation of the outdoor air when Fig. 3 is the expression defrosting.
The refrigeration cyclic graph that flows of the cold-producing medium when Fig. 4 is the cooling operation of air conditioner of presentation graphs 1.
Fig. 5 is the refrigeration cyclic graph that flows that heats the cold-producing medium when turning round of the air conditioner of presentation graphs 1.
Fig. 6 is the refrigeration cyclic graph that flows of the cold-producing medium of the top to outdoor heat converter of the air conditioner of presentation graphs 1 when defrosting.
Fig. 7 is the refrigeration cyclic graph that flows of the cold-producing medium of the bottom to outdoor heat converter of the air conditioner of presentation graphs 1 when defrosting.
The performance plot that room temperature when Fig. 8 is the entry into service that heats of air conditioner of presentation graphs 1 changes.
Among the figure:
The 1-air conditioner, the 2-indoor set, the 5-remote controller, 6-off-premises station, 8-connecting pipings, the 10-control device, the 33-indoor heat converter, 72-cross valve, 73-outdoor heat converter, the 74-decompressor, the 75-compressor, 76-accumulator, 311-indoor fan, the indoor air supply motor of 313-, the 631-outdoor fan, the outdoor air supply motor of 633-, 710-sucks pipe arrangement, 711-discharges pipe arrangement, 712-utilizes the side tracheae, 713-liquid pipe, 714-heat source side tracheae, 715-hot-gas bypass pipe, 713a-upside major loop switch valve, 713b-downside major loop switch valve, 713d-heat pipe, 715a-upside bypass cock valve, 715b-downside bypass cock valve, 716a-upside bypass pipe, 716b-downside bypass pipe, 731-upside heat exchanger, the 731a-first upside refrigerant loop, the 731b-second upside refrigerant loop, 731c-the 3rd upside refrigerant loop, 732-downside heat exchanger, the 732a-first downside refrigerant loop, the 732b-second downside refrigerant loop, 811a-refrigerant temperature detecting sensor, 811b-refrigerant temperature detecting sensor, 812-refrigerant temperature detecting sensor.
The specific embodiment
Below, the air conditioner of use description of drawings one embodiment of the present of invention.
At first, use Fig. 1 and Fig. 2 to describe about the integral body formation of the air conditioner of present embodiment.Fig. 1 is the pie graph of the air conditioner of one embodiment of the present of invention.Fig. 2 is the kind of refrigeration cycle pie graph of the air conditioner of Fig. 1.
Air conditioner 1 possesses kind of refrigeration cycle, air-supply arrangement and controls their control system and constitute.In addition, this air conditioner 1 is to wait the separate type air conditioner that connects indoor set 2 and off-premises station 6 by refrigerant piping 8, electric wiring, signal wiring.
Kind of refrigeration cycle has compressor 75, cross valve 72, outdoor heat converter 73, major loop switch valve 713a, 713b, decompressor 74, heat pipe 713d, indoor heat converter 33 and bypass cock valve 715a, 715b, they is connected by refrigerant piping constitute.Refrigerant piping comprises suction pipe arrangement 710, discharges pipe arrangement 711, utilizes side tracheae 712, liquid pipe 713, heat source side tracheae 714, hot-gas bypass pipe 715, heat pipe 713d, upside bypass pipe 716a and downside bypass pipe 716b etc.
Thereby outdoor heat converter 73 constitutes high-pressure side heat exchanger (condenser) when the cooling operation of kind of refrigeration cycle, constitutes low-pressure side heat exchanger (evaporimeter) in when running of heating that heats circulation.In addition, indoor heat converter 33 constitutes high-pressure side heat exchanger (condenser) in when running of heating that heats circulation, constitutes low-pressure side heat exchanger (evaporimeter) when the cooling operation of kind of refrigeration cycle.
Each upside heat exchanger 731 and downside heat exchanger 732 are connected on the decompressor 74 by major loop switch valve 713a, 713b.Be provided with hot gas bypass circuit in addition, this hot gas bypass circuit is from branch between upside heat exchanger 731, downside heat exchanger 732 and major loop switch valve 713a, the 713b, and is connected on the discharge pipe 711 of compressor 75 with hot-gas bypass pipe 715 by bypass cock valve 715a, 715b.
Decompressor 74 is located between outdoor heat converter 73 and the indoor heat converter 33, when the cooling operation of kind of refrigeration cycle, the cold-producing medium from outdoor heat converter 73 is reduced pressure, the cold-producing medium from indoor heat converter 33 is reduced pressure in when running of heating that heats circulation.In addition, decompressor 74 is made of the expansion valve that can control throttle opening, for example electrodynamic type valve etc. in the present embodiment.
Major loop switch valve 713a, 713b and bypass cock valve 715a, 715b are made of the electromagnetic switch valve, are used for the major loop and the hot gas bypass circuit of switch cold-producing medium.
Air-supply arrangement in air conditioner 1 comprises outdoor air-supply arrangement 63 that is contained in the off-premises station 6 and the indoor with supply unit 31 that is contained in the indoor set 2.Outdoor air-supply arrangement has makes the outdoor fan 631 that outdoor air circulates and the outdoor air supply motor 633 of drive chamber's external fan 631 in outdoor heat converter 73.Indoor with supply unit has makes the indoor fan 311 that room air circulates and the indoor air supply motor 313 of drive chamber's internal fan 311 in indoor heat converter 33.In the present embodiment, use aerofoil fan, use axial-flow fan as indoor fan 311 as outdoor fan 631.
Control system in air conditioner 1 possesses refrigerant temperature sensors 811a, 811b, 812 and control device 10 and constituting. Refrigerant temperature sensors 811a, 811b, 812 comprise: refrigerant temperature sensors 811a, the 811b of the upside heat exchanger 731 of the outdoor heat converter 73 when detection heats, the outlet temperature of downside heat exchanger 732; And the refrigerant temperature sensors 812 of the outlet temperature of the outdoor heat converter 73 when detecting reverse cycle defrosting.
The running action of air conditioner 1 then, is described with reference to Fig. 3～Fig. 8.
At first, use Fig. 4 illustrates the cooling operation in the kind of refrigeration cycle.The kind of refrigeration cycle that flows of the cold-producing medium when Fig. 4 is the cooling operation of pneumatic regulator of presentation graphs 1.When carrying out the cooling operation of air conditioner 1, it is such to convert cross valve 72 to Fig. 4, major loop switch valve 713a, 713b are made as out, bypass cock valve 715a, 715b are made as the pass and form the cooling operation circulation, and running compressor 75, outdoor air supply motor 633 and indoor air supply motor 313.
The gas refrigerant that sucks in the compressor 75 is compressed by compressor 75, and become the gas refrigerant of HTHP, solid arrow direction to Fig. 4 flows, enter into the upside heat exchanger 731 and the downside heat exchanger 732 of the outdoor heat converter 73 that becomes condenser by cross valve 72, carry out heat exchange and be cooled condensing with outdoor air, become the cold-producing medium of liquid or gas-liquid mixed.
Then, cold-producing medium enters decompressor 74 by major loop switch valve 713a, 713b, is depressurized by expansion, becomes the cold-producing medium of the gas-liquid mixed of low pressure.This gas-liquid mixed refrigerant represents that in Fig. 4 the direction of arrow of the dotted line that flows of low pressure refrigerant flows, after passing through heat pipe 713d, flow out into indoor set 2 from off-premises station 6, enter into the indoor heat converter 33 that becomes evaporimeter, carry out heat exchange with room air and to indoor refrigeration, self is heated and becomes gas refrigerant and return compressor 75.
Then, use Fig. 5 that the running that heats that heats in the circulation is described.Fig. 5 is the refrigeration cyclic graph that flows that heats the cold-producing medium when turning round of the air conditioner of presentation graphs 1.When heating running, it is such to convert cross valve 72 to Fig. 5, major loop switch valve 713a, 713b are made as out, bypass cock valve 715a, 715b are made as close and form and heat operation cycle, and running compressor 75, outdoor air supply motor 633 and indoor air supply motor 313.
The gas refrigerant that sucks in the compressor 75 is compressed by compressor 75, and become the gas refrigerant of HTHP, solid arrow direction to Fig. 5 flows, enter into the indoor heat converter 33 that becomes condenser by cross valve 72, carry out heat exchange and be cooled condensing with room air, become the cold-producing medium of liquid or gas-liquid mixed.
The cold-producing medium that condenses and become liquid or gas-liquid mixed flows out into off-premises station 6 from indoor set 2, in bottom that is centered around outdoor heat converter 73 or defrost water outlet heat pipe 713d nearby, flow, the borneol that falls when melting defrosting also is discharged to it outside off-premises station 6 fully, can not produce residual frost in off-premises station 6.Cold-producing medium by heat pipe 713d enters decompressor 74, is depressurized by expansion, becomes the cold-producing medium of the gas-liquid mixed of low pressure.This gas-liquid mixed refrigerant represents that in Fig. 5 the direction of arrow of the dotted line that flows of low pressure refrigerant flows, by major loop switch valve 713a, 713b, enter into the upside heat exchanger 731 and the downside heat exchanger 732 of the outdoor heat converter 73 that becomes evaporimeter, carry out heat exchange with outdoor air and be heated, become gas refrigerant and return compressor 75.
Move by carrying out the above-mentioned running that heats that heats in the circulation repeatedly, proceed to heat running.
Heat when running this, outdoor heat converter 73 is owing to the outdoor air extract heat becomes low temperature, becomes sometimes below 0 ℃ and frosting on heat-transfer area.If the temperature of outer gas is low and humidity is high, then this now becomes obviously, owing to attached to the frost on the circulating face of outdoor air, and the circulation of obstruction outdoor air and reduce the air quantity of outdoor fan 631.If the air quantity of outdoor fan 631 reduces, then as replenishing this air quantity, the temperature of outdoor heat converter 73 is further descended, thus easier frosting.Like this, the frosting of outdoor heat converter 73 continues to increase, and air conditioner 1 reduces from the heat that outdoor air sucks, and heating capacity also reduces, and can not fully heat indoor, and so the function that forfeiture heats is the running that need defrost.
Then, use Fig. 6 and Fig. 7 to heating defrosting in the circulation, heating running and describe.Fig. 6 is the refrigeration cyclic graph that flows of the cold-producing medium of the top to outdoor heat converter of the air conditioner of presentation graphs 1 when defrosting, and Fig. 7 is the refrigeration cyclic graph that flows of the cold-producing medium of the bottom to outdoor heat converter of the air conditioner of presentation graphs 1 when defrosting.
As mentioned above, when heating running, in the big sky of moisture, frosting on outdoor heat converter 73, thus heating capacity descends.Be lower than the temperature of regulation in refrigerant temperature sensors 812, and in heating circulation, heat running and carried out the occasion more than the stipulated time, think that the amount of frosting reaches the amount of regulation, utilize the defrosting running that heats circulation.This defrosting running is set for when heating running cross valve 72 image patterns 6 identical like that, 713a is made as the pass with the major loop switch valve, 713b is made as out with the major loop switch valve, 715a is made as out with the bypass cock valve, 715b is made as the pass with the bypass cock valve, upside heat exchanger 731 in the outdoor heat converter 73 is worked as condenser, and downside heat exchanger 732 is worked as evaporimeter, thereby form the defrosting that defrosts simultaneously and heat, heat operation cycle.At this moment, the outdoor air supply motor 633 of low-speed running, the running of air supply motor 313 in the control room is so that blow out temperature and can keep more than the set point of temperature.
At this, the gas refrigerant that sucks in the compressor 75 is compressed by compressor 75, and become HTHP gas refrigerant, discharge to discharge pipe 711, branch on the way, a side cold-producing medium enters cross valve 72, and the opposing party's cold-producing medium enters hot-gas bypass pipe 715.
The cold-producing medium that enters a side of cross valve 72 flows along the solid arrow direction of Fig. 6, enters indoor heat converter 33, carries out heat exchange with room air and is cooled and condenses, and becomes the cold-producing medium of liquid or gas-liquid mixed.At this moment carry out indoor heating.The cold-producing medium that becomes liquid or gas-liquid mixed flows out from indoor set 2 and enters off-premises station 6, flows borneol and it is discharged to outside the off-premises station 6 around melting in heat pipe 713d.Cold-producing medium by heat pipe 713d enters decompressor 74, is depressurized by expansion, becomes the cold-producing medium of the gas-liquid mixed of low pressure.This gas-liquid mixed refrigerant flows along the direction of arrow of the dotted line that flows of expression low pressure refrigerant among Fig. 6, by major loop switch valve 713b, enter into the downside heat exchanger 732 of the outdoor heat converter 73 that becomes evaporimeter, carry out heat exchange with outdoor air and be heated, become gas refrigerant and return compressor 75.
On the other hand, the cold-producing medium that enters hot-gas bypass pipe 715 is mobile along the solid arrow direction of Fig. 6, by the upside heat exchanger 731 of bypass cock valve 715a inlet chamber outer heat-exchanger 73.The cold-producing medium that enters upside heat exchanger 731 is a HTHP, so melt attached to the frost on the upside heat exchanger 731 and it is flowed down downwards.The thawing water that flows down flow into the downside heat exchanger 732 that works as evaporimeter, flows down in the frosting of melting downside heat exchanger 732 at first, becomes low temperature along with flowing down, and the occasion that the temperature degree is low etc. is frozen at last once more outside.
At this moment, to 732 heat supplies of downside heat exchanger, this heat promotes the gasification of the cold-producing medium of downside heat exchanger 732 inside to thawing water when flowing down.That is, in upside heat exchanger 731, be used for the hot frosting of melting a part of downside heat exchanger 732 of a part of the thawing of frosting, further help the gasification of inner cold-producing medium to be recovered, effectively use the heat that defrosts.
The cold-producing medium of frost of removing upside heat exchanger 731 is after flowing out upside heat exchanger 731, with the cold-producing medium interflow of gasification in the downside heat exchanger 732 and return compressor 75.Rise to set point of temperature if the defrosting running of upside heat exchanger 731 is carried out the refrigerant temperature sensors 811a of the outlet of stipulated time or upside heat exchanger 731, then secondly carry out the defrosting of downside heat exchanger 732.
Convert the defrosting of downside heat exchanger 732 to, 713a is made as out with the major loop switch valve, 713b is made as the pass with the major loop switch valve, 715a is made as the pass with the bypass cock valve, 715b is made as out with the bypass cock valve, downside heat exchanger 732 in the outdoor heat converter 73 is worked as condenser, and upside heat exchanger 731 is worked as evaporimeter, thereby form the defrosting that defrosts simultaneously and heat, heat operation cycle.At this moment, the outdoor air supply motor 633 of low-speed running, the running of air supply motor 313 in the control room is so that blow out temperature and can keep more than the set point of temperature.
At this, flow to indoor heat converter 33 from cross valve 72, identical when being depressurized the mobile of device 74 decompressions cold-producing medium before and upside heat exchanger 731 being defrosted.The cold-producing medium that is depressurized device 74 decompressions is mobile along the direction of arrow of the dotted line of Fig. 7, by major loop switch valve 713a, entering into becomes the upside of evaporimeter heat exchanger 731, carries out heat exchange with outdoor air and is heated, and becomes gas refrigerant and returns compressor 75.
The cold-producing medium that enters hot-gas bypass pipe 715 is mobile along the solid arrow direction of Fig. 7, by the downside heat exchanger 732 of bypass cock valve 715b inlet chamber outer heat-exchanger 73.The cold-producing medium that enters downside heat exchanger 732 is a HTHP, so melt attached to the frost on the downside heat exchanger 732 and it is flowed down downwards.The thawing water that flows down is discharged outside off-premises station 6 from the outlet of defrost water.The cold-producing medium of frost of removing downside heat exchanger 732 is after flowing out downside heat exchanger 732, with the cold-producing medium interflow of gasification in the upside heat exchanger 731 and return compressor 75.If with the defrosting running process stipulated time of downside heat exchanger 732, or the refrigerant temperature sensors 811b of the outlet of downside heat exchanger 732 rises to set point of temperature, then major loop switch valve 713a, 713b are made as out, bypass cock valve 715a, 715b are made as the pass, finish defrosting, heat running, directly turn back to the running that heats of Fig. 5.
As mentioned above, in the occasion that the air heat source and thermal pump air conditioner is heated running, if the humidity height of outdoor air then produces frosting on outdoor heat converter 73.If the generation frosting then ventilating duct of outdoor heat converter 73 narrows down, therefore the amount of the outdoor air of circulation reduces in outdoor heat converter 73.If the amount of the outdoor air of circulation reduces, then heat exchange amount tails off, and therefore the evaporating temperature of the cold-producing medium that flows in outdoor heat converter 73 in order to replenish it descends.The temperature of cold-producing medium descends then that the surface temperature of the outer gas side of outdoor heat converter 73 also descends, and more is easy to generate frosting, and frosting further develops.
Just reduce from the heat that outdoor air sucks with outdoor heat converter 73 in this case, therefore the heat of dispersing from indoor heat converter 73 also reduces and heating capacity is reduced, thereby indoor comfort is impaired.In order to prevent this situation, when the amount of the frosting of outdoor heat converter 73 surpassed the amount of regulation, the frosting of melting outdoor heat converter 73 by defrosting was discharged and it is flowed down outside machine.At this moment, the thawing water of the bottom of outdoor heat converter 73 by coming from top stream is therefore than the easy residual water droplet in top.Defrost running and begin to heat running as if finishing under the state of residual water droplet, then residual water droplet freezes and the ventilation of obstruction outdoor air.If hinder the ventilation of outdoor air, then frosting increases easily as mentioned above, and heating capacity continues to descend.
At this, bypass cock valve 715a at entrance side with the outdoor heat converter 73 that possesses the discharge side that connects compressor 75 and heating when, the hot gas bypass circuit of 715b, and in the air heat source and thermal pump air conditioner of the defrosting of the outdoor heat converter 73 when opening by-passing valve 715a or 715b and heating running, outdoor heat converter 73 above-below directions are divided into the bottom a plurality of refrigerant loops littler than top, and each loop is connected in parallel, and between each of indoor heat converter 33 and a plurality of refrigerant loops, major loop switching mechanism 713a is set, 731b, alternation switch major loop switching mechanism 713a, 713b and bypass cock valve 715a, 715b and, proceed to heat running with other loops simultaneously to defrosting in a loop of a plurality of refrigerant loops.
Thus, the downside heat exchanger 732 or the upside heat exchanger that do not defrost can be proceeded to heat running as evaporimeter.And when defrosting, the area of the heat exchanger that must thaw with the hot gas from compressor 75 narrows down when downside heat exchanger 732 is defrosted.Because as long as the frosting of this narrow scope of heating, the required time that therefore defrosts shortens.
In addition, as long as because the narrow scope of heating, so thermal capacitance easily spreads all over everywhere, fully thaw, and thawing and the temperature of the water droplet that flows down also rises, reduced viscosity and flowing down easily, and a part is easily to air evaporation.Like this, in downside heat exchanger 732, do not flow down and the amount of residual water droplet reduces.Thereby downside heat exchanger 732 becomes the few state that is not easy frosting of residual water when each defrosting, so carrying out of frosting is slack-off.If frosting carry out slack-offly, then correspondingly can postpone the beginning of the defrosting of outdoor heat converter 73, can be with defrosting, heat running and fully heat to indoor.
Therefore, the defrosting that defrosts when can be implemented in, heat running, can shorten defrosting, heat the required time of running, can keep indoor comfort for a long time indoor heating.
In addition, when generally heating under the temperature conditions of picture generation frosting, the situation that outer temperature degree is low is many, in order to improve the temperature of hot blast, demanding adiabatic condensation temperature, and, the suction pressure of compressor 75 is step-down because outer temperature degree is low, so compression ratio improves the decrease in efficiency of compressor 75.In order to remedy this situation, when using revolution control compressor etc., need to improve the internal circulating load that revolution is guaranteed cold-producing medium.And the workload of compressor 75 also increases heating capacity, and institute is so that fully work and guarantee heating capacity of compressor 75.Therefore, compressor 75 drives with high capacity, and compressor 75 keeps high temperature.If enter defrosting, heat running from this state, then because compressor 75 keeps high temperature, thus hot gas bypass circuit, flow with the condition of high temperature from the cold-producing medium of compressor 75 discharges, and flow into upside heat exchanger 731.
In addition, general, to the outdoor fan 631 of outdoor heat converter 73 air-supplies, effectively carry out heat exchange in order to make a large amount of circulations of outer gas, use aerofoil fan 631.Because the blast that aerofoil fan can produce is so not big, therefore the structure of off-premises station 6 constitutes outer aspiration inlet, outdoor heat converter 73, aerofoil fan 631 and outer air-blowing outlet is arranged in roughly straight line, ventilating path is made simple shape, thereby suppress the pressure loss of ventilation.
Like this, owing to a large amount of outer gas is ventilated, the amount of therefore passing through the outer gas of outdoor heat converter 73 changes according to the place owing to the difference of ventilating path.In the occasion of separation chamber's outer heat-exchanger 73 up and down, the bottom of outdoor heat converter 73 is subjected to the influence on ground more strongly than top, though minimum, flowing resistance can increase.Because this minimum difference, the amount of the outer gas that flows in the bottom of outdoor heat converter 73 reduces slightly.
Therefore, if compare the upper and lower of outdoor heat converter 73, then downside heat exchanger 732 is compared with upside heat exchanger 731, and wind speed is slack-off, and heat exchange performance descends.Therefore, downside heat exchanger 732 is compared with upside heat exchanger 731, becomes low temperature, frosting easily.And, because the thawing water during the defrosting by the upside heat exchanger 731 that comes from top stream of the bottom of outdoor heat converter 73, therefore than the easy residual water droplet in top.If finish defrosting under the state of residual water droplet, heat running, and begin to heat running, then residual water droplet freezes, and hinders the ventilation of outdoor air.If hinder the ventilation of outdoor air, then as mentioned above, and then frosting increases easily.
So, when carrying out the defrosting of outdoor heat converter 73, order with upside heat exchanger 731, downside heat exchanger 732 defrosts, and is set at the defrosting time of downside heat exchanger 732 also longer than the defrosting time of the upside heat exchanger 731 that carries out before.Thus, frosting on outdoor heat converter 73, and frosting degree defrosts, heats running successively from upside heat exchanger 731 when reaching the ormal weight that needs defrosting.At first, in the refrigerant loop of upside, flow, defrost, heat running from the gas of hot gas bypass circuit.The hot gas owing to flow in the refrigerant loop of upside is so attached to the frost melts on the air side heat-transfer area of the refrigerant loop of the upside of outdoor heat converter 73, flow down downwards.
In the high occasion of the temperature of this thawing water, thawing water contacts with the frosting of the air side heat-transfer area of downside heat exchanger 732, further flows down when the sensible heat with thawing water self melts this frosting.At this moment, the part of melting frostings at downside heat exchanger 732 is removed the frosting that hinders heat to transmit, thus carry out smoothly moving from the heat of outer gas to cold-producing medium, the recovery heat exchange capacity, thus the decline of indoor heating capacity suppressed.If the temperature of the thawing water that flows down drops to fusing point, then thawing water can not melt frosting again and flow down, and is solidified by the refrigerant cools of the downside refrigerant loop that flows in the downside heat exchanger when flowing down.
At this moment, the cold-producing medium of the heat of solidification of thawing water heating downside refrigerant loop is so be used for being recovered at the heat of the thawing of upside heat exchanger frosting.If finish to be used for the defrosting of upside heat exchanger 731 defrosting, heat running, then then begin to be used for the defrosting of downside heat exchanger 732 defrosting, heat running.Owing in the refrigerant loop of downside, flow,, carry out the defrosting of downside heat exchanger 73 downwards so, flow down attached to the frost melts on the air side heat-transfer area of the refrigerant loop of the downside of outdoor heat converter 73 from the hot gas of compressor 75.
At this moment, upside heat exchanger 731 defrosting that just has been through with so removed the frosting that hinders heat to transmit, is therefore carried out moving from the heat of outer gas to cold-producing medium smoothly, the recovery heat exchange capacity, thus suppress the decline of indoor heating capacity.Like this, also can suppress the decline significantly of heating capacity in defrosting, when heating running, proceed simultaneously to heat.
In addition, when the defrosting of upside heat exchanger 731, the frosting degree of downside heat exchanger 732 temporarily increases.But, since finish and then to be used for after the defrosting of upside heat exchanger 731 defrosting of upside heat exchanger 732 defrosting, heat running, so downside heat exchanger 32 is also defrosted.Thereby the frosting that can not have a downside heat exchanger 732 continues to increase and produces the situation of residual frost.Therefore, frosting can be removed fully, residual frost can be do not produced.
In addition, in initial defrosting, heat the defrosting that the hot gas of high temperature can be used for upside heat exchanger 731 in the running, so though defrosting, heat running time short, can be to defrosting on a large scale.At this moment, also be in the condition of high temperature, so though heating capacity reduces, the time is short, so the change of room temperature is little, can suppress the decline of indoor comfort owing to be transported to the temperature of the cold-producing medium of indoor heat converter 33.
Like this, can in the short time after begin to defrost, heating running, finish the defrosting of large-scale upside heat exchanger 731, and be converted to the defrosting of downside heat exchanger 732.In the defrosting of the defrosting that is used for downside heat exchanger 732, heat running, the scope of the downside heat exchanger 732 that defrosts is narrower than upside heat exchanger 731, but owing to before the top of carrying out upside heat exchanger 731 defrosting, heat running the temperature of the discharge gas of compressor 75 descended, so this defrosting, heat running required time elongated.
In addition, because easily frosting on downside heat exchanger 732, so need fully to increase this defrosting, heat the time of running and prevent to produce residual frost.But, at this moment because the defrosting of upside heat exchanger 731 of being through with, so upside heat exchanger 731 can be given full play to its heat-exchange capacity, receive heat from outer aspiration, suppress the decline of the discharge temperature of compressor 75, the temperature that suppresses hot gas descends, and can defrost, heat running.Thus, this defrosting, the required time that heats running are controlled so as to about 2 times of defrosting required time of square heat-exchanger, thus with the situation comparison of reverse cycle defrosting running can shorten upside heat exchanger 731 and downside heat exchanger 732 defrosting, heat the total of the required time of running.And, at this moment, suppressed the decline of the discharge temperature of compressor 75, so can also suppress the decline of heating capacity.Therefore, defrost in the time of can be to indoor heating, and can shorten defrosting, heat the required time of running.
Generally, in order efficiently to heat running, the discharge temperature of the compressor 75 when heating running is controlled in about 70 ℃.Compressor 75 with hyperbaric chamber, owing to this discharging refrigerant is full of in the hyperbaric chamber, so compressor 75 can keep high temperature.In addition, for after the defrosting that finishes outdoor heat converter 73, begin to heat running easily, the discharge temperature of the compressor 75 when requiring defrosting to finish is more than the room temperature, descend if consider from compressor 75 to indoor heat converter 33 temperature, then preferably more than 25 ℃.
In the present embodiment, on the basis of following idea, make the present invention, promptly, by shortening forbidding the time of defrosting, restriction finishes defrosting attached to the amount of the frosting on the outdoor heat converter 73 and with the heat that is stored in the compressor 75, thereby can shorten the required time of defrosting, accelerate to turn back to the recovery of the heating capacity after heating
At this, have compressor 75, cross valve 72, indoor heat converter 33, decompressor 74 that possesses steely shell and the outdoor heat converter 73 that possesses aluminum fin, and outer temperature degree is to be set at below the numerical value of following formula (1) during defrosting more than 0 ℃ the time is forbidden.
The caloric receptivity (kW) of the quality of (branch)=8 * compressor (kg) ÷ outdoor heat converter during the longest defrosting is forbidden ... (1)
Thus, 70 ℃～25 ℃ the heat that is stored in the compressor of high temperature can be used for the defrosting of outdoor heat converter 73, can be from indoor draw heat.For example in the air conditioner of heating capacity 6.7kW grade, the quality of compressor 75 is about 12kg.Therefore, the amount of stored heat Q that can utilize is about 12 (quality) * 0.435 (specific heat: owing to being estimates to suppose all to make of iron and steel) * (70-25)=235kJ.
But at this moment,, therefore need to add that also frosting and outdoor heat converter 73 rise to 0 ℃ of required heat because the temperature of outdoor heat converter 73 is about-5 ℃.This heat can be regarded as an one-tenth of amount of stored heat Q roughly, is 235-24=211kJ so can be used for the heat of the thawing of frosting.
On the other hand, the air quantity of the outdoor air-supply arrangement 63 of the air conditioner of this grade is 12.5m
3About/min, the temperature degree is that the caloric receptivity of outdoor heat converter 73 is estimated as 4.0kW near the many runnings of 5 ℃/4 ℃ (DB/WB) frosting degree outside.The mean temperature of the outdoor heat converter 73 of this moment is about-4 ℃, and sensible heat ratio is 0.65, and frosting degree is 1.9kg/h.The required heat of the thawing of this frosting is 634kJ.Thus, if be set at (235-24) ÷ 634=0.33 hour=in 20 minutes, just can only carry out the defrosting of outdoor heat converter 73 during defrosting forbidden with the accumulation of heat of compressor 75.
At this, the heating capacity condition determination of air heat source and thermal pump air conditioner is the ISO specification, the state of outer gas is as 7 ℃/6 ℃ (DB/WB), so by being designed under this state, not enter the defrosting running, thereby if outer temperature degree produces frosting hardly than the temperature rising of 5 ℃ of high then outdoor heat converters 73.On the other hand, if outer temperature degree is lower than 5 ℃, then the absolute temperature of outer gas descends, so frosting degree tails off.Therefore, in calculated example with near 5 ℃ of the maximum outer temperature degree of frosting degree as an example.
In addition, though the air output of outdoor air-supply arrangement 63 is set at 12.5m
3About/min, even but air quantity changes, and the temperature change of outdoor heat converter 73, as shown in Figure 3, near the slope of the saturated steam line this temperature is also roughly the same with the value of above-mentioned sensible heat ratio, so the sensible heat ratio after changing also is 0.65.Thereby frosting degree does not change yet, and is 1.9kg/h.In a word, if caloric receptivity certain (if heating capacity is certain), near heating in the running this temperature then, frosting degree is certain.
Like this, if know the quality and the heating capacity of compressor 75, just obtain general the heating the duration of runs that reaches the defrosting amount that can be only defrosts with the amount of stored heat of compressor 75, during will forbidding as defrosting than the time that lack this duration of runs.Have again, outdoor heat converter 73 is divided into a plurality of refrigerant loops up and down, in defrosting, heat running at least more than one the refrigerant loop of cutting apart is worked as evaporimeter.Thus, in defrosting, when heating running, also can make from the caloric receptivity of the part of the outdoor heat converter 73 that works as evaporimeter and the heat that energising produced of compressor 75 and partly help indoor heating, suppress the decline of the heating capacity of indoor set 2, descend thereby can suppress indoor temperature.Therefore, can prevent the decline of indoor comfort.
In addition, during being forbidden, defrosting was made as 20 minutes～5 minutes.Thus,, limited the frosting degree of outdoor heat converter 73, can only supply defrosting, heat the defrosting heat when turning round with the accumulation of heat of compressor 75 for nearly all heating capacity grade.Therefore, can prevent the decline of indoor comfort.
Also have, follow outer gas decrease of temperature, the discharge temperature of control compressor 75 moves to high temperature side, and shorten defrost forbid during.Thus, the amount of stored heat of compressor 75 increases, and defrosts, heats and shorten the duration of runs, accelerates to turn back to the recovery of the discharge temperature that heats the compressor 75 when turning round, and shorten the fall time of heating capacity.Therefore, the room temperature that also can control defrosting under low outer temperature degree, heat when turning round changes.
In addition, defrost, heat when running and also reduce when heating running the revolution of outdoor fan 631, and the temperature degree occasion lower than setting outside, when turning round, defrosting stops the running of outdoor draft fan.Like this, by in defrosting, heat when running and reduce the revolution of outdoor fan 631, in defrosting, reduced by the heat that outer aspiration goes because of the forced convertion due to the outdoor fan 631 from thawing water and fin, conduit when heating running, white thawing is carried out efficiently.In addition, the temperature of gas further reduces outside, and the occasion that the heat dissipation capacity of outside gas increases stops the running of outdoor fan 631.Thus, the most of heat that is gone by outer aspiration because of the forced convertion due to the outdoor fan 631 is effective to white thawing, and the defrosting of outdoor heat converter 73 is carried out efficiently.Therefore, can shorten defrosting, heat the duration of runs, and under low outer temperature degree, also can not defrost, heat the residual frost of generation in the running.
In addition, also do not reach the occasion of setting until the temperature that reaches the longest defrosting outdoor heat converter duration of runs 73 even defrost to turn round, conversion cross valve 72 carries out the reverse cycle defrosting running.Thus, near the refrigerant loop outlet (the outdoor heat converter inlet during cold air) of the outdoor heat converter 73 of failing to melt fully by the hot-gas bypass defrosting of carrying out reverse cycle defrosting running, can be melted in heating in the circulation residual frost with high temperature refrigerant from compressor 75.
Like this and since be provided with condition and meteorological condition deterioration and in common defrosting, heat in the running occasion that produces residual frost, can not have the running of defrosting completely of residual frost yet.Therefore, can enlarge and to carry out the indoor condition that is provided with that heats and the scope of meteorological condition.
Then, with reference to Fig. 8 the beginning characteristic that heats of present embodiment is described.The performance plot that room temperature when Fig. 8 is the entry into service that heats of air conditioner of presentation graphs 1 changes.At this, suppose it is cold morning, room temperature, outer temperature degree are all from-5 ℃ state.
Shown in the characteristic of Fig. 8, present embodiment pass through heat the running and the defrosting, heat in the mode of running, the defrosting the duration of runs be approximately 2 minutes shorter, and, also work and carry out indoor heating in defrosting, the part that heats outdoor heat converter in the running as evaporimeter, therefore the decline of indoor temperature also is controlled in about about 3 ℃, guarantees comfortableness and proceed to heat.And, to time of advent of 20 ℃ of indoor temperatures be 80 minutes shorter.
Claims (7)
1. air conditioner, connect compressor with refrigerant piping, cross valve, indoor heat converter, decompressor and outdoor heat converter and constitute kind of refrigeration cycle, above-mentioned outdoor heat converter is divided into two and be connected in parallel, and the major loop switching mechanism is set at the above-mentioned when running entrance side of heating of refrigerant loop that is divided into each outdoor heat converter of two, be provided with the discharge side that connects above-mentioned compressor and above-mentioned be divided into two each outdoor heat converter refrigerant loop heat running the time entrance side hot gas bypass circuit, and the bypass cock valve is set on hot gas bypass circuit, control device with control running, it is characterized in that
Above-mentioned outdoor heat converter is divided into two up and down by its refrigerant loop, constitutes downside heat exchanger and the upside heat exchanger bigger than this downside heat exchanger,
Above-mentioned control device is controlled as follows: under the occasion that begins to defrost in heating running, above-mentioned major loop switching mechanism and above-mentioned bypass cock valve are carried out switch on the contrary, carrying out after the defrosting of above-mentioned upside heat exchanger and the defrosting that heats with above-mentioned downside heat exchanger, heating running, carry out the defrosting of above-mentioned downside heat exchanger and the defrosting that heats with above-mentioned upside heat exchanger, heat running, after finishing this defrosting that above-mentioned downside heat exchanger is defrosted and heat, heating running, return and heat running with above-mentioned upside heat exchanger.
2. air conditioner according to claim 1 is characterized in that,
Compare defrosting of above-mentioned upside heat exchanger and the defrosting that heats with above-mentioned downside heat exchanger, the time that heats running, above-mentioned control device prolongs above-mentioned downside heat exchanger is defrosted and the defrosting that heats with above-mentioned upside heat exchanger, the time that heats running.
3. air conditioner according to claim 1 is characterized in that,
Use has the compressor of iron and steel system shell, and the temperature degree is to be set at below the numerical value of following formula (1) during defrosting more than 0 ℃ the time is forbidden outside:
During defrosting is forbidden=caloric receptivity of the quality/outdoor heat converter of 8 * compressor ... (1),
Wherein, the unit during defrosting is forbidden is for dividing, and the unit of the quality of compressor is kg, and the unit of the caloric receptivity of outdoor heat converter is kW.
4. air conditioner according to claim 3 is characterized in that,
During forbidding, above-mentioned defrosting is set at 20 minutes～5 minutes.
5. air conditioner according to claim 1 is characterized in that,
Above-mentioned control device makes the discharge temperature of above-mentioned compressor control movably to high temperature side based on outer gas decrease of temperature, and be controlled to can shorten the defrosting forbid during.
6. air conditioner according to claim 1 is characterized in that,
Above-mentioned control device is controlled as follows: in defrosting, heat when running than heating the revolution that also reduces outdoor air-supply arrangement when turning round, and stop the running of outdoor air-supply arrangement when the temperature degree turns round than the defrosting under the low occasion of setting outside.
7. air conditioner according to claim 1 is characterized in that,
Above-mentioned control device is controlled as follows: even defrosting, heating running until reaching defrosting duration of runs, the temperature of above-mentioned outdoor heat converter does not reach under the occasion of setting yet, changes above-mentioned cross valve and carries out reverse cycle defrosting running.
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| JP2006242740 | 2006-09-07 | ||
| JP2006242740A JP4272224B2 (en) | 2006-09-07 | 2006-09-07 | Air conditioner |
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| CN100510583C true CN100510583C (en) | 2009-07-08 |
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| CN114270110B (en) | 2019-08-23 | 2023-06-02 | 三菱电机株式会社 | Air conditioner |
| CN113587530B (en) * | 2021-08-12 | 2023-04-14 | 澳蓝（福建）实业有限公司 | Defrosting method for indirect evaporation heat exchange core body of data center |
| CN114110813A (en) * | 2021-11-17 | 2022-03-01 | 浙江国祥股份有限公司 | Non-frosting air conditioning unit and control method thereof |
| CN114370692A (en) * | 2022-02-28 | 2022-04-19 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| JPWO2023209968A1 (en) * | 2022-04-28 | 2023-11-02 | ||
| KR20240010359A (en) * | 2022-07-15 | 2024-01-23 | 삼성전자주식회사 | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910008658Y1 (en) * | 1988-10-07 | 1991-10-26 | 삼성전자 주식회사 | Heat pump air conditioner |
| KR19980027426A (en) * | 1996-10-16 | 1998-07-15 | 구자홍 | Refrigerant control device of multi-room air conditioner |
| JP2001330347A (en) | 2000-05-22 | 2001-11-30 | Hitachi Ltd | Air-conditioner |
| KR100459045B1 (en) * | 2002-08-20 | 2004-12-03 | 이춘희 | The heating and cooling system device use for heat pump |
| JP2006105560A (en) | 2004-10-08 | 2006-04-20 | Matsushita Electric Ind Co Ltd | Air conditioner |
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| KR100846266B1 (en) | 2008-07-16 |
| JP2008064381A (en) | 2008-03-21 |
| JP4272224B2 (en) | 2009-06-03 |
| CN101140123A (en) | 2008-03-12 |
| KR20080023106A (en) | 2008-03-12 |
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Effective date of registration: 20160818 Address after: Hongkong, China Patentee after: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Hitachi Appliances Inc. |
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Effective date of registration: 20180621 Address after: Tokyo, Japan, Japan Patentee after: Hitachi Johnson Controls Air Conditioning Co., Ltd. Address before: Hongkong, China Patentee before: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. |