CN101382367B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN101382367B CN101382367B CN2008101700547A CN200810170054A CN101382367B CN 101382367 B CN101382367 B CN 101382367B CN 2008101700547 A CN2008101700547 A CN 2008101700547A CN 200810170054 A CN200810170054 A CN 200810170054A CN 101382367 B CN101382367 B CN 101382367B
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Abstract
The invention relates to a heat pump refrigerating cycle, which comprises an outdoor unit provided with a compressor, a four-way valve, a pressure reducer and an outdoor heat exchanger, and at least one indoor unit provided with an indoor heat exchanger, which are connected by a refrigerant circuit; and the pressure reducer is arranged between the indoor heat exchanger and the outdoor heat exchanger. The heat pump refrigerating cycle is provided with a first bypass circuit for connecting a piping between the indoor heat exchanger and the pressure reducer and a piping between the four-way valveand the outdoor heat exchanger, wherein the first bypass circuit is provided with a two-way valve and a refrigerant heater; and a second bypass circuit for connecting a piping between the four-way valve and the indoor heat exchanger, a part of a piping between the compressor and the four-way valve, and a piping between the pressure reducer and the outdoor heat exchanger, wherein the second bypasscircuit is provided with a two-way valve. When the outdoor heat exchanger defrosts, the two-way valve of the first bypass circuit is opened, so that the refrigerant heated by the refrigerant heater flows to a first bypass at the suction side of the compressor to run, and the two-way valve of the second bypass circuit is opened, so that the refrigerant runs through a second bypass of the outdoor heat exchanger.
Description
The application be that August 3, application number in 2006 are 2006101091501 the applying date, name is called the dividing an application of application of " conditioner ".
Technical field
The present invention relates to when making warm running, while can continue to make the warm conditioner of removing attached to the defrosting running of the frost on the outdoor heat converter by the heat pump running.
Background technology
In the past, this heat pump type air adjusting device to adopt usually and switched cross valve in order to remove attached to the frost on the outdoor heat converter when system is warm, the Defrost mode that the cold-producing medium of kind of refrigeration cycle is flowed in the other direction.That is, defrosting running is made as the flow direction of cold-producing medium identical when freezing, and the flow of refrigerant that makes HTHP is in outdoor heat converter, and thawing is attached to the frost on the heat exchanger.
In this Defrost mode and since when defrosting the indoor heat exchanger become evaporimeter, therefore exist indoor temperature to warm up and reduce, thereby make the people feel this basic problem of cold wind sense because of stopping system.
As the countermeasure of this basic problem, while proposed to continue the method that the warm running of system defrosts and turns round.
Figure 17 is the figure of structure chart that represents the kind of refrigeration cycle of conditioner in the past.As shown in figure 17, the heat pump type refrigerating circulation that constitutes by refrigerant loop binding compressor 101, cross valve 102, indoor heat converter 110, expansion mechanism 105 and outdoor heat converter 103, comprise: the cold-producing medium heating circuit, it links between expansion mechanism 105 and the outdoor heat converter 103, reaches between the suction side of compressor 101, and has cold-producing medium heater 104; Defrosting loop 109, it links between ejection side, outdoor heat converter 103 and the cross valve 102 of compressor 101.
When the heat pump running of kind of refrigeration cycle, when the defrosting of carrying out outdoor heat converter 103, after the cold-producing medium process compressor 101 by 104 heating of cold-producing medium heater, branch into the stream of process indoor heat converter 110 and 109 streams through outdoor heat converters 103 from the defrosting loop, the cold-producing medium stream of these branches is at the inlet interflow of cold-producing medium heating circuit, once more by 104 heating (for example, with reference to patent documentation 1) of cold-producing medium heater.
[patent documentation 1] spy opens flat 11-182994 communique (Fig. 5)
Yet, in the kind of refrigeration cycle mode of patent documentation 1 record, as described in this problem that is suggested, if determine condition, then can when carry out, the defrosting running of the off-premises station when having carried out the heat pump running warm up the running that defrosts while continue system, but produce following problem.
The structure of this kind of refrigeration cycle is when defrosting running, open two-port valve 109a, the ejection cold-producing medium of compressor 101 flows between outdoor heat converter 103 and cross valve 102, therefore two-port valve 106 need be set, and makes the hot gas refrigerant of defrosting not flow in the compressor suction side.
Because two-port valve 106 is attached at the suction side of compressor 101, therefore the crushing when reducing refrigeration and the warm running of system needs to adopt the very big two-port valve of bore of high price.
In addition, owing to add heat run turning round by heat pump to open two-port valve 108 and switch to cold-producing medium, thereby in the mode of the running that defrosts, the cold-producing medium stream counter-rotating of outdoor heat converter 103, therefore need be before the running that defrosts temporary close two-port valve 107 and turning round, two-port valve 107 need be set at the inlet of this outdoor heat converter 103.
Therefore, this kind of refrigeration cycle needs four two-port valves, thereby is mode complicated and high price.
In addition, cold-producing medium after owing to be used for defrosting and the cold-producing medium interflow after indoor heat converter 110 heat radiations, therefore if the refrigerant pressure at place, interflow greater than the pressure of the cold-producing medium after being used to defrost, then flow of refrigerant is to outdoor heat converter 103, if then flow of refrigerant arrives the indoor on the contrary, thereby while can't make the warm running that defrosts sometimes.
In addition, cold-producing medium after owing to be used for defrosting and the cold-producing medium interflow after indoor heat converter 110 heat radiations, therefore be easy to generate cold-producing medium noise (refrigerant sound),, also need to be provided with cold-producing medium interflow device sometimes in order to solve described pressure balanced problem and cold-producing medium noise problem.
In addition, increase, therefore need increase the pipe arrangement diameter as its countermeasure owing to increase the pressure loss at place, described interflow circulating mass of refrigerant, thus also having heaters this constructivity problem that maximizes.In addition, when the heating and cooling agent of ejection flowed into the pipe arrangement of caliber increase, the refrigerant velocities of ejection gas reduced, and can't guarantee the defrosting ability fully, thereby frost also might be residual.
In addition, because if turn round with refrigerating circuit, then stablize because of low pressure refrigerant the pipe arrangement inside of cold-producing medium heater 104, the temperature of cold-producing medium heater 104 reduces, therefore no matter on cold-producing medium heater 104 during dewfall or two-port valve 108 hinder for some reason and when producing cold-producing medium and leaking, on the cold-producing medium heater, all produce dewfall, thereby also in the reliability of cold-producing medium heater, security, have problems sometimes.
Summary of the invention
The present invention makes in view of this problem that prior art has just, its purpose is to provide a kind of comfortableness excellence, conditioner that reliability is high, does not have the stable defrosting of cold-producing medium noise, pressure balanced problem and turns round while this conditioner can continue to make warm running.
In order to achieve the above object, the invention is characterized in, has the heat pump type refrigerating circulation, described heat pump type refrigerating circulation has compressor by the refrigerant loop binding, cross valve, the off-premises station of pressure reducer and outdoor heat converter, and has at least one indoor set of indoor heat converter, and between described indoor heat converter and described outdoor heat converter, be provided with pressure reducer, be provided with the pipe arrangement that links between described indoor heat converter and the described pressure reducer and first bypass circulation of the pipe arrangement between described cross valve and the described outdoor heat converter, be provided with two-port valve and cold-producing medium heater at this first bypass circulation, and be provided with the pipe arrangement that links between described cross valve and the described indoor heat converter and the side in the pipe arrangement between described compressor and the described cross valve, and second bypass circulation of the pipe arrangement between described pressure reducer and the described outdoor heat converter, be provided with two-port valve at this second bypass circulation, when the defrosting of described outdoor heat converter, open the two-port valve of described first bypass circulation, make by the flow of refrigerant of described cold-producing medium heater heating first bypass and turn round to the suction side of described compressor, with the two-port valve of open described second bypass circulation, make the second bypass running of cold-producing medium through described outdoor heat converter.
According to this structure, implement the defrosting running while can make warm running.In addition, while owing to continue the warm running that defrosts of system, so do not produce the cold-producing medium noise when switching cross valve.In addition, do not switch cross valve during owing to defrosting, so pressure oscillation is little, the change of the oil of compressor is also little, therefore can realize the high running of reliability of compressor.
In addition, even when connecting pipings length is elongated, defrost circuit also is in outdoor, thus there is not the situation that compressor oil level descends in the defrosting running that causes because of piping length, even long pipe arrangement commodity also can be realized the high running of reliability of compressor.In addition, because the part of whole cold-producing mediums is used in defrosting,, can constitute by the cold-producing medium heater of compactness so there be not the situation of very many flow of refrigerant to the cold-producing medium heating part.
In addition, if before the defrosting of carrying out outdoor heat converter, the heating portion energising to the cold-producing medium heater makes the accumulation of heat of cold-producing medium heater, can accumulate in the heat of cold-producing medium heater with the hot gas utilization when then defrosting, so defrosting time can shorten.
In addition, if at the compressor that uses volume-variable, before the heating portion energising to the cold-producing medium heater, to reduce the operating frequency of compressor with variable volume, make the revolution electric current of conditioner reach the following mode of rated current and carry out Current Control, then because can be in the predetermined electric current capacity, the heating portion energising of cold-producing medium heater, cause the situation of breaker action so do not exist current capacity to exceed standard, can switch on to the cold-producing medium heater safely.
In addition, before heating portion energising to the cold-producing medium heater, setting makes the revolution electric current of conditioner reach the following Current Control of rated current, if the revolution electric current value of conditioner reaches below the rated current, the revolution electric current controlling value is risen, to the heating portion energising of cold-producing medium heater, so, can in the predetermined electric current capacity, the heating portion of cold-producing medium heater be switched on reliably, can control compressor frequency.
In addition, if the cold-producing medium heater comprises thermal source portion, cold-producing medium and passes through pipe portion, reaches by accumulation of heat material coating thermal source portion and cold-producing medium and pass through the heat storage unit of pipe portion, then can constitute the cold-producing medium heater compactly, can be with the space configuration of existing off-premises station, so can realize and the off-premises station sharing of other machines, become cheapness and simple structure.
In addition, if when the defrosting of outdoor heat converter finishes, make the two-port valve of second bypass circulation close valve, and the outdoor draft fan that is arranged on off-premises station is turned round, then add in the heat run owing to a part being branched off into cold-producing medium while the running that defrosts, so the cold-producing medium of outdoor heat converter stream is nonreversible, can constitute the kind of refrigeration cycle of the two-port valve that does not use a plurality of high prices by simple bypass circulation.In addition, because after the cold-producing medium after in indoor heat converter, dispelling the heat by the heating of cold-producing medium heater, cold-producing medium interflow after making it and being used to defrost is so while can continue to make the stable defrosting running that warm running implements not produce cold-producing medium noise, pressure balanced problem.In addition, even outer temperature reduces, also can realize not making indoor temperature to reduce, do not make the people to feel that the system of cold wind sense is warm.
In addition, if when the defrosting of outdoor heat converter finishes, the rotating speed of outdoor draft fan is with the low low-speed running of rotating speed than when beginning defrosting, the heat of then accumulating redundantly in outdoor heat converter is difficult for being ejected into outside the off-premises station, heat spread all over outdoor draft fan around, so the frost around the outdoor draft fan and ice quick, morely and melt.
In addition, if when the defrosting of outdoor heat converter finishes, on closing direction, control pressure reducer, close valve until the cold-producing medium heating that makes first bypass circulation with two-port valve, then can separately make the cold-producing medium of warm running and outdoor defrosting running, continue the warm running of system so can on one side add heat run with cold-producing medium, in defrosting will redundantly accumulate that heat in outdoor heat converter in all be used in the frost of off-premises station and the dissolving of ice use on one side.
In addition, if when the defrosting of outdoor heat converter finishes, the heating of continuation in the cold-producing medium heater, close valve until the cold-producing medium heating that makes first bypass circulation with two-port valve, then can on one side add heat run and continue the warm running of system with cold-producing medium, in defrosting will redundantly accumulate that heat in outdoor heat converter in all be used in the frost of off-premises station and the dissolving of ice use on one side.
In addition, also be provided with the outdoor heat converter Temperature Detector and the outside air temperature degree detector that detects the outside air temperature degree of the temperature of sensing chamber's outer heat-exchanger, in the defrosting running, when in official hour, not reaching the temperature of regulation by the detected outdoor heat converter temperature of outdoor heat converter Temperature Detector, can also stop first and second bypass running, by cross valve refrigerant loop be switched to kind of refrigeration cycle and defrost.According to this structure, can prevent may be because of the frost that adds the unequal generation of heat of the freezing of the adhering to of outer gas air-conditioning load variations or snow, heat exchanger, cold-producing medium heater residual.
In addition, if when the defrosting running beginning that you carry out by first and second bypass running, according to the heat that adds of adjusting the cold-producing medium heater by the detected outside air temperature degree of outside air temperature degree detector, then can defrost, thereby can suppress futile power consumption with the heat that adds corresponding to the best of load.In addition, the judgement temperature optimization of the judgement time by making the regulation of in the defrosting of bypass running, judging or the outdoor heat converter temperature of regulation, just do not exist vainly switching to defrost by cross valve, thus the situation of the comfortableness of the warm running of infringement system.
If lift an example, the judgement time of then establishing described regulation for example is 10 minutes and 30 seconds, increases the heat of cold-producing medium heater when the temperature degree is low outside, makes judgement time lengthening to 10 in the defrosting running minute more than 30 seconds, the running that can defrost fully thus also can be kept comfortableness.In addition, if the judgement temperature of the outdoor heat converter temperature of described regulation for example is 6 ℃, increase the heat of cold-producing medium heater when the temperature degree is low outside, the judgement temperature setting of the outdoor heat converter temperature in the defrosting running is altered to more than 10 ℃, can play same effect thus.
In addition, the present invention also can be applicable to the so-called multi-path type conditioner that possesses a plurality of indoor sets.
Promptly, also can constitute: off-premises station has first current divider that links a plurality of indoor heat converters and cross valve, second current divider that reaches a plurality of indoor heat converters of binding and outdoor heat converter, between a plurality of indoor heat converters and second current divider, be respectively arranged with pressure reducer, and between second current divider and outdoor heat converter, be provided with open and close valve.Under this situation, as long as following formation: first bypass circulation links pipe arrangement between second current divider and the open and close valve and the pipe arrangement between cross valve and the outdoor heat converter, on the other hand, second bypass circulation links pipe arrangement and the side in the pipe arrangement between compressor and the cross valve between the cross valve and first current divider, reaches the pipe arrangement between open and close valve and the outdoor heat converter.
According to this structure, on one side owing to can make the flow of refrigerant of high temperature arrive indoor heat converter, Yi Bian make the cold-producing medium of high temperature also flow to outdoor heat converter, so implement the defrosting running while can make warm running.
Or, can constitute: off-premises station has first current divider, second current divider that links a plurality of indoor heat converters and outdoor heat converter that links a plurality of indoor heat converters and cross valve, the 3rd current divider that reaches a plurality of indoor heat converters of binding and first bypass circulation, is respectively arranged with pressure reducer between a plurality of indoor sets and second current divider.Under this situation, as long as following formation: first bypass circulation links the pipe arrangement between the 3rd current divider, cross valve and the outdoor heat converter, on the other hand, second bypass circulation links pipe arrangement and the side in the pipe arrangement between compressor and the cross valve between the cross valve and first current divider, reaches the pipe arrangement between second current divider and the outdoor heat converter.
According to this structure, because utilize the expansion valve of cold-producing medium shunting usefulness, on one side can make the flow of refrigerant of high temperature arrive indoor heat converter, Yi Bian make the cold-producing medium of high temperature also flow to outdoor heat converter, so need not append new valve, implement the defrosting running while can make warm running.
In addition, also can be: off-premises station has first current divider that links a plurality of indoor heat converters and cross valve, second current divider that reaches a plurality of indoor heat converters of binding and outdoor heat converter, between a plurality of indoor heat converters and second current divider, be respectively arranged with pressure reducer, and be provided with a plurality of first bypass circulations.Under this situation, as long as following formation: a plurality of first bypass circulations have two-port valve and cold-producing medium heater respectively, and link pipe arrangement between a plurality of indoor heat converters and the pressure reducer and the pipe arrangement between cross valve and the outdoor heat converter, on the other hand, second bypass circulation links pipe arrangement and the side in the pipe arrangement between compressor and the cross valve between the cross valve and first current divider, reaches the pipe arrangement between second current divider and the outdoor heat converter.
According to this structure, Yi Bian make in a plurality of indoor heat converters warmly by the flow of refrigerant of the high temperature of each cold-producing medium heater heating, the cold-producing medium of high temperature is also flow in the outdoor heat converter on one side by making, can implement defrosting and turn round.And, be equipped on a plurality of used for indoor machine independently owing to will be provided with first bypass circulation of cold-producing medium heater, so can bring into play the warm ability of system fully, can realize running corresponding to heater load, best in each room according to indoor set.
Description of drawings
Fig. 1 is the structure chart of the conditioner of embodiments of the present invention 1;
Fig. 2 is the block diagram of the conditioner of Fig. 1;
Time diagram when Fig. 3 is the control of conditioner of Fig. 1;
Time diagram when Fig. 4 is the control of conditioner of embodiments of the present invention 2;
Time diagram when Fig. 5 is the control of conditioner of embodiments of the present invention 3;
Fig. 6 is the structure chart of the conditioner of embodiments of the present invention 4;
Fig. 7 is the block diagram of the conditioner of Fig. 6;
Time diagram when Fig. 8 is the control of conditioner of Fig. 6;
Another time diagram when Fig. 9 is the control of conditioner of Fig. 6;
Figure 10 is the structure chart of the conditioner of embodiments of the present invention 5;
Figure 11 is the structure chart of the conditioner of embodiments of the present invention 6;
Figure 12 is the structure chart of the conditioner of embodiments of the present invention 7;
Figure 13 is the block diagram of the conditioner of Figure 10, Figure 11 or Figure 12;
Time diagram when Figure 14 is the control of conditioner of Figure 10;
Time diagram when Figure 15 is the control of conditioner of Figure 11;
Time diagram when Figure 16 is the control of conditioner of Figure 12;
Figure 17 is the structure chart of conditioner in the past.
Among the figure, the 1-compressor; The 2-cross valve; 3,3a, 3b-indoor heat converter; 4,4a, 4b-pressure reducer; The 5-outdoor heat converter; 6-first bypass circulation; 7,7a, 7b-cold-producing medium heating two-port valve; 8,8a, 8b-cold-producing medium heater; 9-second bypass circulation; 10-defrosting two-port valve; 11-defrosting pressure reducer; 12-cold-producing medium heating pressure reducer; 13-heater thermal source; The 14-cold-producing medium is by pipe portion; The 15-heat storage unit; The 17-indoor blower; 18,18a, 18b-indoor set; The 19-outdoor draft fan; The 20-off-premises station; 21-outdoor heat converter Temperature Detector; 22-outside air temperature degree detector; 23-first current divider; 25-second current divider; The 26-open and close valve; 27-the 3rd current divider; 50-defrosting beginning decision mechanism; 51-compressor operation mechanism; 52-cold-producing medium heating two-port valve switching mechanism; 53-defrosting two-port valve switching mechanism; 54-expansion valve opening changeable mechanism; 55-outdoor draft fan works; 56-cross valve switching mechanism; 57-heater thermal source running shut-down mechanism; 58-defrosting beginning receiving mechanism; 59-indoor blower works.
The specific embodiment
Below, with reference to accompanying drawing on one side embodiments of the present invention described on one side.
Fig. 1 represents the structure chart of the conditioner of embodiments of the present invention 1.
In Fig. 1, off-premises station 20 comprises compressor 1, cross valve 2, pressure reducer 4, outdoor heat converter 5, outdoor draft fan 19.The pressure reducer 4 here also can be electromagnetic expanding valve.On the other hand, indoor set 18 comprises indoor heat converter 3, indoor blower 17.
In addition, in off-premises station 20, be provided with first bypass circulation 6 and second bypass circulation 9.First bypass circulation 6 link pipe arrangement between indoor heat converters 3 and the pressure reducer 4, and cross valve 2 and outdoor heat converter 5 between pipe arrangement, have the cold-producing medium heating with two-port valve 7, cold-producing medium heater 8.Have again, cold-producing medium heater 8 comprise cold-producing medium heating with pressure reducer 12, cold-producing medium heating thermal source 13, cold-producing medium by pipe portion 14, and coat cold-producing medium heating thermal source 13 and cold-producing medium heat storage unit 15 by pipe portion 14 by the accumulation of heat material.In addition, if cold-producing medium heating thermal source 13 heaters, no matter then be which kind of shape, mode all can.
In the warm running of common system, the cold-producing medium heating is closed with two-port valve 7 and defrosting two-port valve 10, cold-producing medium does not flow in first bypass circulation 6 and second bypass circulation 9, by compressor 1 refrigerant compressed process cross valve 2, by indoor heat converter 3 condensations, and dispel the heat to room air by cold-producing medium.And then, the kind of refrigeration cycle that is repeated below, to indoor make warm: cold-producing medium imports heat by pressure reducer 4 decompression and evaporation in outdoor heat converter 5 from outdoor air, turns back to once more in the compressor 1 to be compressed.
But, reaching subzero grade when very low at outside air temperature, frost is attached on the outdoor heat converter 5, reduces with the heat exchanger effectiveness of outdoor air, and therefore the warm ability drop of system needs defrosting.
Fig. 2 is the control block diagram of embodiments of the present invention 1, and Fig. 3 is the time diagram of the control of embodiments of the present invention 1.
In Fig. 2, defrost by defrosting beginning decision mechanism 50 at outdoor pusher side and to begin to judge, when being judged as the defrosting beginning, compressor operation mechanism 51, cold-producing medium heating two-port valve switching mechanism 52, defrosting two-port valve switching mechanism 53, expansion valve opening changeable mechanism 54, outdoor draft fan works 55, cross valve switching mechanism 56, heater thermal source running shut-down mechanism 57, carry out action as shown in Figure 3, running thus defrosts.
At this moment, receive defrosting commencing signal from off-premises station 20 by the defrosting commencing signal receiving mechanism 58 of indoor set 18, according to the judgement of defrosting running by indoor blower works 59 control indoor blower 17.
As shown in Figure 3, if the judgement of the beginning that defrosts is then turned round from the warm accumulation of heat of transferring to the cold-producing medium heater 8 of step 2 of system that heat pump carries out of passing through of step 1.At this moment, compressor 1 reduced frequency before opening cold-producing medium heating thermal source 13, even but cold-producing medium heating thermal source 13 is open-minded, and current capacity also is reduced to the current value that does not exceed standard.Then, open cold-producing medium heating thermal source 13,, carry out the accumulation of heat running 8 energisings of cold-producing medium heater.
Then, after step 3 was transferred to cold-producing medium and added heat run, running defrosted.
Cold-producing medium heating operates under the state of opening cold-producing medium heating thermal source 13, opens the cold-producing medium heating with two-port valve 7, controls opening on the direction.At this moment, pressure reducer 4 is as carrying out obturation running, but or plays a role near the closing organ of the running of obturation.In addition, outdoor draft fan (external fan) 19 stops in defrosting.Cross valve 2 is warm in order to continue system, does not also switch in the defrosting under the state in the warm loop of system.In addition, indoor blower (internal fan) 17 is because the continuation system is warm, so do not stop.
Then, to open defrosting two-port valve 10 in order defrosting, to control opening on the direction.In addition, compressor 1 is with the operating frequency running of defrosting.
Then, when step 4 defrosting finishes, turn back to the preceding action of defrosting, and then after step 5, reset into the warm running of common heat pump system.
The compressor of a constant speed has, in above-mentioned embodiment 1, the operating frequency of compressor 1 changed, even but also can continue the warm running that defrosts of system.In addition, the rotating speed of indoor blower 17 and outdoor draft fan 19 can be fixed also and can change.
Fig. 4 is the time diagram of the control of embodiments of the present invention 2 when moving, and the structure chart of conditioner and control block diagram are identical with above-mentioned embodiment 1.
As shown in Figure 4, if the judgement of the beginning that defrosts then from the warm running of system that heat pump carries out of passing through of step 1, is carried out the preparation running before opening the cold-producing medium heating thermal source 13 of cold-producing medium heater 8 of step 2.This preparation running changes along reducing direction by making the Current Control value, reduces the frequency of compressor 1, reduces comprehensive current value and does not exceed standard until current capacity, and cold-producing medium heating thermal source 13 can be open-minded safely.
Then, the Current Control value is risen, open cold-producing medium heating thermal source 13 in step 3.In addition, compressor frequency rises to the frequency of defrosting then, by the comprehensive current value of the current value of the current value of Current Control value control cold-producing medium heating thermal source 13 and compressor operation.
By carrying out this Current Control, can in the scope of current capacity,, make 8 accumulation of heats of cold-producing medium heater to 13 energisings of cold-producing medium heating thermal source, do not make the breaker action, carry out cold-producing medium safely and add heat run and defrosting running.
Fig. 5 is the time diagram of the control of embodiments of the present invention 3 when moving, and the structure chart of conditioner and control block diagram are identical with above-mentioned embodiment 1.
As shown in Figure 5, if the judgement of the beginning that defrosts, then the warm cold-producing medium that passes through of transferring to step 2 of system that heat pump carries out that passes through from step 1 adds warm running of system that heat run is carried out.
At first, open cold-producing medium heating with two-port valve 7, control opening on the direction, in addition, open cold-producing medium heating thermal source 13, carry out cold-producing medium and add heat run.At this moment, pressure reducer 4 such as expansion valve carries out inaccessible running or near inaccessible running.
Therefore, by indoor heat converter 3 condensed refrigerant, major part flow to first bypass circulation 6, heats with after the pressure reducer 12 with two-port valve 7, cold-producing medium through the cold-producing medium heating,, heat by pipe portion 14 through the cold-producing medium in the cold-producing medium heater 8 by cold-producing medium heating thermal source 13.
In addition, outdoor draft fan 19 stops in defrosting, flow to a spot of cold-producing medium in the outdoor heat converter 5 without first bypass circulation 6, and intactly the cold-producing medium with heating in first bypass circulation 6 collaborates.Cross valve 2 warms up in order to continue system, does not also switch in the defrosting under the state in the warm loop of system, so cold-producing medium is compressed by compressor 1 through cross valve 2.
At this, the major part of cold-producing medium is heated by cold-producing medium heating thermal source 13 in first bypass circulation 6, and then by compressor 1 compression, so be fully to continue to make warm state, indoor blower 17 does not stop, and it is warm to continue system.
Then, in step 3,, open defrosting two-port valve 10, control opening on the direction in order to carry out the defrosting of outdoor heat converter 5.In addition, compressor 1 is with the operating frequency running of defrosting.
Thus, by the cold-producing medium of compressor 1 boil down to for the sufficient state of defrosting of outdoor heat converter 5, a part flow in second bypass circulation 9, through defrosting two-port valve 10, defrosting pressure reducer 11, enters into outdoor heat exchange and goes 5.Because the cold-producing medium boil down to is for the sufficient state of the defrosting of outdoor heat converter 5, and then outdoor draft fan 19 stops, so cold-producing medium carries out heat exchange with outdoor air hardly, therefore, its heat is used in the defrosting of outdoor heat converter 5.
According to above step, implement stable defrosting running (below, also have the situation of hot-gas bypass defrosting) while continuing the warm running of system, in the time of the defrosting end of outdoor heat converter 5, transfer in the step 4, carry out the dissolving running of the frost and the ice of outdoor draft fan 19 and periphery thereof.
At first, close defrosting two-port valve 10, cold-producing medium is flow in second bypass circulation 9.In addition, cold-producing medium heating thermal source 13 continues heating.Therefore, in first bypass circulation 6, heat, and then all flow in the indoor heat converter 3, continue the warm running of system by compressor 1 refrigerant compressed by cold-producing medium heating thermal source 13.
On the other hand, by in the outdoor heat converter 5 that defrosts, the residual heat that is useful on defrosting that is to say the heat that existence is accumulated redundantly in step 3.When frost was attached to the outside air temperature of this degree on the outdoor heat converter 5, it is more that frost also is attached to the outdoor draft fan 19 or the situation on the circumferential component of miscellaneous part of off-premises station 20, and these defrostings also are important problem.
At this, continue inaccessible running or approaching inaccessible running by pressure reducers such as expansion valve 4, the heat energy of accumulating in outdoor heat converter 5 enough is not used in the warm running of common system, and keeps accumulating the state in outdoor heat converter 5.
In addition,, the heat of accumulating in outdoor heat converter 5 is dispelled the heat gradually, thereby dissolving is attached to frost and ice on outdoor draft fan 19 or the circumferential component by making outdoor draft fan 19 with the low-speed running lower than when beginning defrosting.
Through after the stipulated time, transfer to step 5, close cold-producing medium heating with two-port valve 7 and close cold-producing medium heating thermal source 13, make pressure reducer 4 open-minded, thereby make frost and the dissolving of ice and the cold-producing medium heating end of being undertaken by heater that is attached on outdoor draft fan 19 or the circumferential component.That is, cold-producing medium does not flow in first bypass circulation 6 yet, flows in common kind of refrigeration cycle.
Then, after step 6, reset into the warm running of common heat pump system.
Fig. 6 represents the structure chart of the conditioner of embodiments of the present invention 4, with embodiment 1 as shown in Figure 1, different on outside air temperature degree detector 22 this point of the temperature of gas outside the outdoor heat converter Temperature Detector 21 of the temperature that is provided with sensing chamber's outer heat-exchanger 5 and sensing chamber.
In addition, Fig. 7 is the control block diagram of expression present embodiment, and Fig. 8 is the time diagram that the movement when moving is controlled in the defrosting of expression hot-gas bypass.Fig. 9 is in the hot-gas bypass defrosting running, and the outdoor heat converter temperature does not arrive when judging temperature in the judgement time of regulation, switches defrost time diagram when (below, be called four-way valve defrosting) of cross valve 2.
In Fig. 7, defrost by defrosting beginning decision mechanism 50 at outdoor pusher side and to begin to judge, when being judged as the defrosting beginning, compressor operation mechanism 51, cold-producing medium heating two-port valve switching mechanism 52, defrosting two-port valve switching mechanism 53, expansion valve opening changeable mechanism 54, outdoor draft fan works 55, cross valve switching mechanism 56, heater thermal source running shut-down mechanism, carry out action as shown in Figure 8, running thus defrosts.
At this moment, receive defrosting commencing signal by defrosting commencing signal receiving mechanism 58 from off-premises station 20 at indoor set 18, the judgement of turning round according to defrosting is by indoor blower works 59 control indoor blower 17.
As shown in Figure 8, if the judgement of the beginning that defrosts, then the warm cold-producing medium that passes through of transferring to step 2 of system that heat pump carries out that passes through from step 1 adds warm running of system that heat run is carried out.At this moment, open cold-producing medium heating with two-port valve 7, control opening on the direction, and open cold-producing medium heating thermal source 13, carry out cold-producing medium and add heat run.In addition, pressure reducer 4 carries out inaccessible running or near inaccessible running, outdoor draft fan 19 stops in defrosting.Cross valve 2 is warm in order to continue system, does not also switch in the defrosting under the state in the warm loop of system.In addition, indoor blower 17 is because the continuation system is warm, so do not stop.
Then, in step 3,, open defrosting two-port valve 10, control opening on the direction in order to defrost.In addition, compressor 1 is with the operating frequency running of defrosting.
At this, in step 3, in the defrosting running of being undertaken by hot-gas bypass control, the outdoor heat converter temperature that detects by outdoor heat converter Temperature Detector 21 not judgement time of regulation (for example, about 10 minutes 30 seconds) in when arriving the judgement temperature (for example, 6 ℃) of regulation, after step 3 finishes, transfer in the step 1 of four-way valve defrosting of Fig. 9 the preparation of beginning four-way valve defrosting control with the time diagram of control.
Then, begin four-way valve defrosting in step 2, the running of beginning compressor 1 continues four-way valve defrosting in step 3.
If in the defrosting running, the outdoor heat converter temperature arrived in the judgement time of regulation judges temperature, then finishes the four-way valve defrosting running, shifts the warm running of the system of restoring to step 4.
In addition, also basis is by outside air temperature degree detector 22 detected temperature, and optimization is adjusted the heat that adds of cold-producing medium heater 8, and makes the judgement time optimalization of the regulation in the step 3 of the defrosting control time of Fig. 8 figure, under this situation, can suppress transfer to the futile effort of four-way valve defrosting.
Figure 10 is the structure chart of the conditioner of embodiments of the present invention 5, and linking on an off-premises station 20 has a plurality of (for example, two) indoor set 18a, 18b.
In Figure 10, be equipped with compressor 1, cross valve 2, first current divider 23, two pressure reducer 4a, 4b, second current divider 25, open and close valve 26, outdoor heat converter 5, first bypass circulation 6, cold-producing medium heating with two-port valve 7, cold-producing medium heater 8, second bypass circulation 9, the two-port valve 10 of second bypass circulation, outdoor draft fan (not shown) at off-premises station 20.First current divider 23 links two indoor set 18a, 18b and cross valve 2, on the other hand, second current divider 25 links two indoor set 18a, 18b and outdoor heat converter 5, but is provided with open and close valve 26 as closing organ between second current divider 25 and outdoor heat converter 5.
In addition, set respectively at indoor set 18a, 18b and be equipped with indoor heat converter 3a, 3b, indoor blower (not shown).
Figure 13 is the control block diagram of present embodiment, and Figure 14 is the time diagram of the movement of this control of expression when moving.
In Figure 13, defrost by defrosting beginning decision mechanism 50 at outdoor pusher side and to begin to judge, when being judged as the defrosting beginning, compressor operation mechanism 51, cold-producing medium heating two-port valve switching mechanism 52, defrosting two-port valve switching mechanism 53, expansion valve opening changeable mechanism 54, outdoor draft fan works 55, cross valve switching mechanism 56, heater thermal source running shut-down mechanism 57, carry out action as shown in figure 14, running thus defrosts.
At this moment, receive the defrosting commencing signals from off-premises station 20 by the defrosting commencing signal receiving mechanism 58 of indoor set 18a, 18b, according to the judgement of defrosting running by indoor blower works 59 control indoor blower (not shown).
Particularly, as shown in figure 14, if the judgement of the beginning that defrosts, then the warm cold-producing medium that passes through of transferring to step 2 of system that heat pump carries out that passes through from step 1 adds warm running of system that heat run is carried out.At this moment, open cold-producing medium heating with two-port valve 7, control opening on the direction.
In addition, defrosting two-port valve 10 is made as inaccessible state, opens cold-producing medium heater 8, carries out cold-producing medium and adds heat run.And then open and close valve 26 is made as the state of opening, and pressure reducer 4a, 4b keep the common aperture of the warm running of system, and cross valve 2 is warm in order to continue system, does not also switch in the defrosting under the state in the warm loop of system.In addition, indoor blower is because the continuation system is warm, so do not stop, outdoor draft fan remains in operation.
Then, in step 3, the compressor operation frequency is changed to the value of defrosting, the cold-producing medium heating is made as the state of opening with two-port valve 7.In addition, establish defrosting two-port valve 10 for open-minded, cold-producing medium heater 8 continues open-minded, carries out cold-producing medium and adds heat run and defrosting running.And then, establishing open and close valve 26 for closing, pressure reducer 4a, 4b shift to the defrosting aperture, and outdoor draft fan shuts down.
And, when step 4 defrosting finishes, turn back to the preceding action of defrosting.
And then, after step 5, reset into the warm running of common heat pump system.
Have again, in the present embodiment, an end of second bypass circulation 9 is attached between the cross valve 2 and first current divider 23, also can obtain same effect but be attached between first current divider 23 and indoor heat converter 18a, the 18b.
Figure 11 and Figure 15 represent the structure chart and the control time figure of the conditioner of embodiments of the present invention 6 respectively.In addition, the control block diagram of Figure 13 also is applicable to present embodiment.
Present embodiment an end is attached on the cold-producing medium heater 8 cold-producing medium heating with the other end of two-port valve 7 via the pipe arrangement between the 3rd current divider 27 and the first indoor heat converter 18a and the pressure reducer 4a, and the second indoor heat converter 18b and pressure reducer 4b between pipe arrangement binding this point on, different with above-mentioned embodiment 5.
In the structure of Figure 11, if the judgement of the beginning that defrosts, then as shown in figure 15, add the defrosting that heat run carries out and turn round from the warm cold-producing medium that passes through of transferring to step 2 of system that heat pump carries out that passes through of step 1.At this moment, open cold-producing medium heating with two-port valve 7, control opening on the direction.
In addition, defrosting two-port valve 10 is made as inaccessible state, opens cold-producing medium heater 8, carries out cold-producing medium and adds heat run.At this moment, pressure reducer 4a, 4b are made as and close, and cross valve 2 is warm in order to continue system, does not also switch in the defrosting under the state in the warm loop of system.In addition, indoor blower is because the continuation system is warm, so do not stop, outdoor draft fan remains in operation.
In the step of following 3, the operating frequency of compressor 1 is changed to the value of defrosting, the cold-producing medium heating is made as the state of opening with two-port valve 7.In addition, establish defrosting two-port valve 10 for open-minded, cold-producing medium heater 8 continues open-minded, carries out cold-producing medium and adds heat run and defrosting running.And then pressure reducer 4a, 4b are made as and close, and outdoor draft fan shuts down.
And, when step 4 defrosting finishes, turn back to the preceding action of defrosting.
And then, after step 5, reset into the warm running of common heat pump system.
Figure 12 and Figure 16 represent the structure chart and the control time figure of the conditioner of embodiments of the present invention 7 respectively.The control block diagram of Figure 13 also is applicable to present embodiment.
Present embodiment is on heating the pipe arrangement between the pipe arrangement between the first indoor heat converter 18a and the pressure reducer 4a and the second indoor heat converter 18b and the pressure reducer 4b with two-port valve 7a, 7b and cold-producing medium heater 8a, 8b and first bypass circulation, 6 binding this point respectively via cold-producing medium, different with above-mentioned embodiment 5.
In the structure of Figure 12, if the judgement of the beginning that defrosts, then shown in the time diagram of Figure 16, add the defrosting that heat run carries out and turn round from the warm cold-producing medium that passes through of transferring to step 2 of system that heat pump carries out that passes through of step 1.At this moment, open cold-producing medium heating with two-port valve 7a, 7b, control opening on the direction.
In addition, defrosting two-port valve 10 is made as inaccessible state, in addition, opens cold-producing medium heater 8a, 8b, carries out cold-producing medium and adds heat run.At this moment, expansion valve 6 and 7 is made as closes, and cross valve 2 is warm in order to continue system, does not also switch in the defrosting under the state in the warm loop of system.In addition, indoor blower is because the continuation system is warm, so do not stop, outdoor draft fan remains in operation.
In the step of following 3, the operating frequency of compressor 1 is changed to the value of defrosting, the cold-producing medium heating is made as the state of opening with two-port valve 7a, 7b.In addition, establish defrosting two-port valve 10 for open-minded, cold-producing medium heater 8a, 8b continue open-minded, carry out cold-producing medium and add heat run.And then pressure reducer 4a, 4b are made as and close, and outdoor draft fan shuts down.
And, when step 4 defrosting finishes, turn back to the preceding action of defrosting.
And then, after step 5, reset into the warm running of common heat pump system.
(industrial utilizability)
Conditioner of the present invention is owing to can implement the defrosting running while carrying out the heating running, so conduct not only can be used in general family, the conditioner that also can be used in the low-down cold district of outdoor temperature is useful.
Claims (3)
1. a conditioner is characterized in that,
Has the heat pump type refrigerating circulation, described heat pump type refrigerating circulation has compressor by the refrigerant loop binding, cross valve, the off-premises station of pressure reducer and outdoor heat converter, and has at least one indoor set of indoor heat converter, but and between described indoor heat converter and described outdoor heat converter, be provided with closing organ, be provided with first bypass circulation, but this first bypass circulation links pipe arrangement between described indoor heat converter and the described closing organ and the pipe arrangement between described cross valve and the described outdoor heat converter, be provided with two-port valve and cold-producing medium heater at this first bypass circulation, and be provided with second bypass circulation, this second bypass circulation links pipe arrangement between described cross valve and the described indoor heat converter and the side in the pipe arrangement between described compressor and the described cross valve, but and the pipe arrangement between described closing organ and the described outdoor heat converter, be provided with two-port valve at this second bypass circulation, when the defrosting of described outdoor heat converter, open the two-port valve of described first bypass circulation, make by the flow of refrigerant of described cold-producing medium heater heating first bypass and turn round to the suction side of described compressor, two-port valve with open described second bypass circulation, make the second bypass running of cold-producing medium through described outdoor heat converter, be provided with a plurality of indoor sets, described off-premises station has first current divider that links a plurality of indoor heat converters and described cross valve, and second current divider of described a plurality of indoor heat converters of binding and described outdoor heat converter, between described a plurality of indoor heat converters and described second current divider, be respectively arranged with pressure reducer, but and between described second current divider and described outdoor heat converter, be provided with open and close valve as described closing organ, described first bypass circulation links pipe arrangement between described second current divider and the described open and close valve and the pipe arrangement between described cross valve and the described outdoor heat converter, on the other hand, described second bypass circulation links pipe arrangement between described cross valve and described first current divider and the side in the pipe arrangement between described compressor and the described cross valve, and the pipe arrangement between described open and close valve and the described outdoor heat converter.
2. a conditioner is characterized in that,
Has the heat pump type refrigerating circulation, described heat pump type refrigerating circulation has compressor by the refrigerant loop binding, cross valve, the off-premises station of pressure reducer and outdoor heat converter, and has at least one indoor set of indoor heat converter, but and between described indoor heat converter and described outdoor heat converter, be provided with closing organ, be provided with first bypass circulation, but this first bypass circulation links pipe arrangement between described indoor heat converter and the described closing organ and the pipe arrangement between described cross valve and the described outdoor heat converter, be provided with two-port valve and cold-producing medium heater at this first bypass circulation, and be provided with second bypass circulation, this second bypass circulation links pipe arrangement between described cross valve and the described indoor heat converter and the side in the pipe arrangement between described compressor and the described cross valve, but and the pipe arrangement between described closing organ and the described outdoor heat converter, be provided with two-port valve at this second bypass circulation, when the defrosting of described outdoor heat converter, open the two-port valve of described first bypass circulation, make by the flow of refrigerant of described cold-producing medium heater heating first bypass and turn round to the suction side of described compressor, two-port valve with open described second bypass circulation, make the second bypass running of cold-producing medium through described outdoor heat converter, be provided with a plurality of indoor sets, described off-premises station has first current divider that links a plurality of indoor heat converters and described cross valve, second current divider that links described a plurality of indoor heat converter and described outdoor heat converter, and the 3rd current divider of described a plurality of indoor heat converters of binding and described first bypass circulation, but between described a plurality of indoor sets and described second current divider, be respectively arranged with pressure reducer as described closing organ, and described first bypass circulation links described the 3rd current divider, pipe arrangement between described cross valve and the described outdoor heat converter, on the other hand, described second bypass circulation links pipe arrangement between described cross valve and described first current divider and the side in the pipe arrangement between described compressor and the described cross valve, and the pipe arrangement between described second current divider and the described outdoor heat converter.
3. a conditioner is characterized in that,
Has the heat pump type refrigerating circulation, described heat pump type refrigerating circulation has compressor by the refrigerant loop binding, cross valve, the off-premises station of pressure reducer and outdoor heat converter, and has at least one indoor set of indoor heat converter, but and between described indoor heat converter and described outdoor heat converter, be provided with closing organ, be provided with first bypass circulation, but this first bypass circulation links pipe arrangement between described indoor heat converter and the described closing organ and the pipe arrangement between described cross valve and the described outdoor heat converter, be provided with two-port valve and cold-producing medium heater at this first bypass circulation, and be provided with second bypass circulation, this second bypass circulation links pipe arrangement between described cross valve and the described indoor heat converter and the side in the pipe arrangement between described compressor and the described cross valve, but and the pipe arrangement between described closing organ and the described outdoor heat converter, be provided with two-port valve at this second bypass circulation, when the defrosting of described outdoor heat converter, open the two-port valve of described first bypass circulation, make by the flow of refrigerant of described cold-producing medium heater heating first bypass and turn round to the suction side of described compressor, two-port valve with open described second bypass circulation, make the second bypass running of cold-producing medium through described outdoor heat converter, be provided with a plurality of indoor sets, described off-premises station has first current divider that links a plurality of indoor heat converters and described cross valve, and second current divider of described a plurality of indoor heat converters of binding and described outdoor heat converter, but between described a plurality of indoor heat converters and described second current divider, be respectively arranged with pressure reducer as described closing organ, and be provided with a plurality of first bypass circulations, these a plurality of first bypass circulations have described two-port valve and described cold-producing medium heater respectively, and link pipe arrangement between described a plurality of indoor heat converter and the described pressure reducer and the pipe arrangement between described cross valve and the described outdoor heat converter, on the other hand, described second bypass circulation links pipe arrangement between described cross valve and described first current divider and the side in the pipe arrangement between described compressor and the described cross valve, and the pipe arrangement between described second current divider and the described outdoor heat converter.
Applications Claiming Priority (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005228201A JP2007040658A (en) | 2005-08-05 | 2005-08-05 | Air conditioner |
| JP2005-228201 | 2005-08-05 | ||
| JP2005228201 | 2005-08-05 | ||
| JP2005235746A JP4774858B2 (en) | 2005-08-16 | 2005-08-16 | Air conditioner |
| JP2005-235746 | 2005-08-16 | ||
| JP2005235746 | 2005-08-16 | ||
| JP2005-236277 | 2005-08-17 | ||
| JP2005236277 | 2005-08-17 | ||
| JP2005236277A JP4654828B2 (en) | 2005-08-17 | 2005-08-17 | Air conditioner |
| JP2005-238157 | 2005-08-19 | ||
| JP2005238157 | 2005-08-19 | ||
| JP2005238157A JP2007051840A (en) | 2005-08-19 | 2005-08-19 | Air conditioner |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101091501A Division CN100439823C (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101382367A CN101382367A (en) | 2009-03-11 |
| CN101382367B true CN101382367B (en) | 2010-06-16 |
Family
ID=37798808
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101091501A Expired - Fee Related CN100439823C (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
| CN2008101700547A Expired - Fee Related CN101382367B (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
| CN2008101700528A Expired - Fee Related CN101382365B (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
| CN2008101700532A Expired - Fee Related CN101382366B (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101091501A Expired - Fee Related CN100439823C (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101700528A Expired - Fee Related CN101382365B (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
| CN2008101700532A Expired - Fee Related CN101382366B (en) | 2005-08-05 | 2006-08-03 | Air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007040658A (en) |
| CN (4) | CN100439823C (en) |
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| JP5082536B2 (en) * | 2007-03-28 | 2012-11-28 | パナソニック株式会社 | Heat pump water heater |
| JP5249293B2 (en) * | 2010-09-09 | 2013-07-31 | パナソニック株式会社 | Air conditioner |
| JP2012057869A (en) * | 2010-09-09 | 2012-03-22 | Panasonic Corp | Air conditioner |
| JP5182347B2 (en) * | 2010-10-01 | 2013-04-17 | パナソニック株式会社 | Heat storage device and air conditioner equipped with the heat storage device |
| EP2636548B1 (en) | 2012-03-05 | 2017-09-06 | Hanon Systems | Heat pump system for vehicle |
| CN102645048B (en) * | 2012-04-01 | 2014-08-13 | 美的集团股份有限公司 | Heat pump air conditioning system without gas-liquid separator |
| CN103712370B (en) * | 2013-12-23 | 2016-06-22 | 南京迪泽尔空调设备有限公司 | A kind of air source heat pump system |
| CN105605841A (en) * | 2016-02-02 | 2016-05-25 | 广东美的制冷设备有限公司 | Air conditioning system and defrosting control method thereof |
| CN105698450A (en) * | 2016-02-02 | 2016-06-22 | 广东美的制冷设备有限公司 | Air conditioner system and defrosting control method of air conditioner system |
| CN105737276A (en) * | 2016-03-29 | 2016-07-06 | 苏州泰隆制冷有限公司 | Outdoor unit fan of air conditioner |
| CN110260467B (en) * | 2019-05-28 | 2021-09-21 | 青岛海尔空调电子有限公司 | Air conditioner and anti-freezing protection control method and control device thereof |
| CN112050370A (en) * | 2019-06-07 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110530054A (en) * | 2019-09-06 | 2019-12-03 | 广东美的暖通设备有限公司 | Heat pump system and its control method, control device and storage medium |
| CN111765595B (en) * | 2020-06-01 | 2021-06-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Multi-split air conditioner and defrosting control method and device thereof and storage medium |
| CN111692683A (en) * | 2020-06-15 | 2020-09-22 | 云能科技有限公司 | Air source heat pump system and defrosting and disinfecting method thereof |
| CN111780465A (en) * | 2020-06-22 | 2020-10-16 | 上海爱斯达克汽车空调系统有限公司 | Shutdown-free electric automobile heat pump defrosting system and operation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101382365A (en) | 2009-03-11 |
| JP2007040658A (en) | 2007-02-15 |
| CN101382365B (en) | 2010-12-15 |
| CN101382367A (en) | 2009-03-11 |
| CN1932417A (en) | 2007-03-21 |
| CN101382366A (en) | 2009-03-11 |
| CN100439823C (en) | 2008-12-03 |
| CN101382366B (en) | 2010-06-09 |
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