CN105157290A - Air conditioner and defrosting control method thereof - Google Patents
Air conditioner and defrosting control method thereof Download PDFInfo
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- CN105157290A CN105157290A CN201410226350.XA CN201410226350A CN105157290A CN 105157290 A CN105157290 A CN 105157290A CN 201410226350 A CN201410226350 A CN 201410226350A CN 105157290 A CN105157290 A CN 105157290A
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Abstract
The invention provides an air conditioner and a defrosting control method thereof, wherein the defrosting control method of the air conditioner comprises the following steps of S1, when a shutdown control signal is received, detecting the outlet temperature of an outdoor heat exchanger of the air conditioner and an outdoor ambient temperature; S2, determining whether the air conditioner operates in a heating manner when the shutdown control signal is received; S3, if the air conditioner operates in the heating manner, determining whether the outlet temperature of the outdoor heat exchanger satisfies a frosting condition; S4, if the outlet temperature of the outdoor heat exchanger satisfies the frosting condition, determining whether the outdoor ambient temperature is smaller than or equal with a preset ambient temperature; and S5, if the outdoor ambient temperature is smaller than or equal with the preset ambient temperature, making the air conditioner perform defrosting. The air conditioner and the defrosting control method therefore are advantageous in that more accurate determination for the defrosting condition on the surface of the outdoor heat exchanger is realized; more intelligent controlling is realized; and furthermore the air conditioner is made to perform defrosting in consideration of the outdoor ambient temperature, thereby preventing unnecessary electric energy waste.
Description
Technical field
The present invention relates to electrical equipment manufacturing technology field, particularly a kind of air-conditioner and defrosting control method thereof.
Background technology
Along with air-conditioner use more prevalent, user to air-conditioner require more and more higher.Traditional air-conditioner is when running with heating mode, when receiving shutdown command, if the frosting of the surface of outdoor heat converter, then under the condition that outdoor environment temperature is lower, the frosting on outdoor heat converter surface cannot be melted automatically by the heat of external environment, even may in high humility, have when wind and build-up ice.Thus next time control air-conditioner run with heating mode time, hinder heat exchange because outdoor heat converter has frosting, also can aggravate the frosting velocity of outdoor heat converter simultaneously, cause heating capacity to reduce and air-conditioner is in anti-cold wind state for a long time.
The scheme had in correlation technique to some extent solves the problems referred to above, such as, before air-conditioner shutdown, controls air-conditioner and carries out defrost operation, but, usually also defrost when outdoor heat converter surface does not have white.In addition, sometimes, even if outdoor heat converter has frosting on the surface, but outdoor environment temperature is higher is such as greater than judgement temperature, namely frosting can be made automatically to melt by the heat of outdoor environment temperature, still carry out pressure defrosting, cause unnecessary waste of energy.
Summary of the invention
Object of the present invention is intended to solve above-mentioned technical problem at least to a certain extent.
For this reason, one object of the present invention is to propose a kind of air-conditioner defrosting control method, the judgement of this air-conditioner defrosting control method to the frosting situation on outdoor heat converter surface is more accurate, control more intelligent, and consider that the temperature of outdoor environment controls air-conditioner defrosting, unnecessary waste of energy can be avoided.
Another object of the present invention is to propose a kind of air-conditioner.
For achieving the above object, an aspect of of the present present invention embodiment proposes a kind of air-conditioner defrosting control method, this defrosting control method comprises the following steps: S1, when receiving pass machine control signal, detects outlet temperature and the outdoor environment temperature of the outdoor heat converter of air-conditioner; Whether S2, judge to receive described air-conditioner when closing machine control signal and run with heating mode; S3, if described air-conditioner runs with heating mode, then judges whether the outlet temperature of described outdoor heat converter meets frosting condition further; S4, if the outlet temperature of described outdoor heat converter meets frosting condition, then judges whether described outdoor environment temperature is less than or equal to default environment temperature further; S5, if described outdoor environment temperature is less than or equal to described default environment temperature, then controls described air-conditioner and defrosts.
According to the air-conditioner defrosting control method of the embodiment of the present invention, when air-conditioner shuts down with heating mode end of run, by the relation of the outlet temperature and frosting condition that judge outdoor heat converter, and consider outdoor environment temperature, control air-conditioner to defrost, it is more accurate to judge the frosting situation of the outdoor heat converter of air-conditioner, usually the problem that there will not be frostless defrost and have frost can't check, and, by considering outdoor environment temperature, in outdoor heat converter frosting, but when can be melted by environment temperature, no longer control air-conditioner to defrost, control more intelligent, unnecessary waste of energy can be avoided.
Further, in some embodiments of the invention, before judgement receives pass machine control signal, described air-conditioner also comprises after running with heating mode: judge whether described air-conditioner carries out Defrost operation; If described air-conditioner carries out Defrost operation, then after defrosting completes, control the shutdown of described air-conditioner; If described air-conditioner does not carry out Defrost operation, then judge whether the running time of described air-conditioner is more than or equal to Preset Time; If the running time of described air-conditioner is more than or equal to described Preset Time, then perform step S3.
Wherein, in some embodiments of the invention, judge whether the outlet temperature of described outdoor heat converter meets frosting condition and specifically comprise; Judge whether the outlet temperature of described outdoor heat converter meets the first frosting condition; If the outlet temperature of described outdoor heat converter meets the first frosting condition, then perform step S4; If the outlet temperature of described outdoor heat converter does not meet the first frosting condition, then judge whether the outlet temperature of described outdoor heat converter meets the second frosting condition further; If the outlet temperature of described outdoor heat converter meets the second frosting condition, then perform step S4.
Particularly, in some embodiments of the invention, described first frosting condition meets:
T≤TB and TA-T >=TC, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, and TB is the first preset temperature, and TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period minimum of a value with heating mode, and TC is that the first preset temperature is poor.
Particularly, in some embodiments of the invention, described second frosting condition meets:
T≤TD and TA-T >=TE, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, TD is the second preset temperature, described second preset temperature is less than described first preset temperature, TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period minimum of a value with heating mode, TE is that the second preset temperature is poor, and it is poor that described second preset temperature difference is less than described first preset temperature.
Further, in some embodiments of the invention, above-mentioned air-conditioner defrosting control method also comprises when the outlet temperature of described outdoor heat converter does not meet the second frosting condition, judges whether the outlet temperature of described outdoor heat converter meets the 3rd frosting condition further; If the outlet temperature of described outdoor heat converter meets the 3rd frosting condition, then perform step S4; If the outlet temperature of described outdoor heat converter does not meet the 3rd frosting condition, then control the shutdown of described air-conditioner.
Particularly, in some embodiments of the invention, described 3rd frosting condition meets:
T≤TF, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, and TF is the 3rd preset temperature, and described 3rd preset temperature is less than described second preset temperature.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of air-conditioner, this air-conditioner comprises temperature detector, and when receiving pass machine control signal, described temperature detecting module detects outlet temperature and the outdoor environment temperature of the outdoor heat converter of air-conditioner; Controller, described controller be used for judgement receive close machine control signal time described air-conditioner whether run with heating mode, and when described air-conditioner runs with heating mode, judge whether the outlet temperature of described outdoor heat converter meets frosting condition further, and when the outlet temperature of described outdoor heat converter meets frosting condition, judge whether described outdoor environment temperature is less than or equal to default environment temperature further, and be less than or equal to described default environment temperature at described outdoor environment temperature, control described air-conditioner and defrost.
According to the air-conditioner of the embodiment of the present invention, when air-conditioner shuts down with heating mode end of run, the outlet temperature of outdoor heat converter and the relation of frosting condition is judged by controller, and consider outdoor environment temperature, control air-conditioner to defrost, it is more accurate to judge the frosting situation of the outdoor heat converter of air-conditioner, usually the problem that there will not be frostless defrost and have frost can't check, and, by considering outdoor environment temperature, in outdoor heat converter frosting, but when can be melted by environment temperature, no longer control air-conditioner to defrost, control more intelligent, unnecessary waste of energy can be avoided.
In some embodiments of the invention, described controller is also for judging whether described air-conditioner carries out Defrost operation, Defrost operation is carried out at described air-conditioner, after defrosting completes, then control the shutdown of described air-conditioner, and do not start Defrost operation at described air-conditioner, then judge whether the running time of described air-conditioner is more than or equal to Preset Time further.
In some embodiments of the invention, described controller is also for judging whether the outlet temperature of described outdoor heat converter meets the first frosting condition, and when described outdoor heat converter does not meet the first frosting condition, judge whether described outdoor heat converter meets the second frosting condition further.
Particularly, in some embodiments of the invention, described first frosting condition meets:
T≤TB and TA-T >=TC, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, and TB is the first preset temperature, and TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period minimum of a value with heating mode, and TC is that the first preset temperature is poor.
Particularly, in some embodiments of the invention, described second frosting condition meets:
T≤TD and TA-T >=TE, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, TD is the second preset temperature, described second preset temperature is less than described first preset temperature, TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period minimum of a value with heating mode, TE is that the second preset temperature is poor, and it is poor that described second preset temperature difference is less than described first preset temperature.
In some embodiments of the invention, described controller, also for when the outlet temperature of described outdoor heat converter does not meet the second frosting condition, judges whether the outlet temperature of described outdoor heat converter meets the 3rd frosting condition further.
Particularly, in some embodiments of the invention, described 3rd frosting condition meets:
T≤TF, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, and TF is the 3rd preset temperature, and described 3rd preset temperature is less than described second preset temperature.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the flow chart of air-conditioner defrosting control method according to an embodiment of the invention;
Fig. 2 is the flow chart of air-conditioner defrosting control method according to another embodiment of the invention;
Fig. 3 is the flow chart of air-conditioner defrosting control method according to still another embodiment of the invention;
Fig. 4 is the flow chart of the air-conditioner defrosting control method for the first frosting condition according to a specific embodiment of the present invention;
Fig. 5 is the flow chart of the air-conditioner defrosting control method for the second frosting condition according to another specific embodiment of the present invention;
Fig. 6 is the flow chart of the air-conditioner defrosting control method for the 3rd frosting condition according to another specific embodiment of the present invention; And
Fig. 7 is the block diagram of air-conditioner according to an embodiment of the invention.
Reference numeral
Air-conditioner 100, temperature detector 10 and controller 20.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
With reference to description below and accompanying drawing, these and other aspects of embodiments of the invention will be known.Describe at these and in accompanying drawing, specifically disclose some particular implementation in embodiments of the invention, representing some modes of the principle implementing embodiments of the invention, but should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
The air-conditioner and defrosting control method thereof that propose according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of air-conditioner defrosting control method according to an embodiment of the invention.As shown in Figure 1, the air-conditioner defrosting control method of the embodiment of the present invention comprises the following steps:
S1, when receiving pass machine control signal, detects outlet temperature and the outdoor environment temperature of the outdoor heat converter of air-conditioner.
Wherein, the pass machine control signal of reception can be sent by remote controller key, or is sent by air-conditioner panel operation, and then obtains the outlet temperature of now outdoor heat converter, and now outdoor environment temperature.
S2, judges that receiving pass machine control signal space-time adjusts device whether to run with heating mode.
Particularly, after air-conditioner receives the pass machine control signal exported by remote controller or control panel, first air-conditioner carries out the judgement of present mode of operation, device is adjusted to run with non-heating mode when judgement receives pass machine control signal space-time, such as now air-conditioner runs in a chiller mode, then outdoor heat converter temperature is higher, and impossible frosting, then can control air-conditioner and directly shut down.If judge that air-conditioner runs with heating mode, then perform step S3.
S3, judges whether the outlet temperature of outdoor heat converter meets frosting condition.
If when receiving pass machine control signal, judge that air-conditioner runs with heating mode, outdoor heat converter temperature is lower, do not carry out the just shutdown of process in time, likely outdoor exchanger surfaces frosting, so in order to keep the heating effect of air-conditioner when next time starts shooting, prevent outdoor heat converter surface frosting, can judge whether the outlet temperature of outdoor heat converter meets frosting condition, is described in detail below concrete determining step further.If the outlet temperature of outdoor heat converter does not meet frosting condition, then can think that the surface of outdoor heat converter does not have frosting or frosting seldom, can automatically melt.If the outlet temperature of outdoor heat converter meets frosting condition, carry out step S4.
S4, if the outlet temperature of outdoor heat converter meets frosting condition, then judges whether outdoor environment temperature is less than or equal to default environment temperature further.
Particularly, if the outlet temperature of outdoor heat converter meets frosting condition, namely tentatively can think and need before being powered off to defrost, further consider whether outdoor environment temperature can melt frosting automatically, such as, judge whether outdoor environment temperature T1 is less than or equal to defrosting and judges that temperature such as presets environment temperature TG, if meet T1≤TG, then perform step S5, if T1>TG, think and the frosting on outdoor heat converter surface can be melted automatically by outdoor environment temperature, then control air-conditioner and directly shut down.Wherein, preset environment temperature TG and can be set as 0 ~ 3 DEG C, preferred scope can be 1 ~ 2 DEG C.Such as, when judging that the outlet temperature of outdoor heat converter meets frosting condition, namely when there is to a certain degree a frosting on outdoor heat converter surface, pressure defrosting may not be carried out, such as when outdoor environment temperature be greater than default environment temperature such as 0 DEG C time, even if there is frosting on outdoor heat converter surface, also automatically can melt because of outdoor environment temperature, if still carry out pressure defrosting in the case, unnecessary electric energy can be consumed.
S5, if outdoor environment temperature is less than or equal to default environment temperature, then controls air-conditioner and defrosts.
Particularly, when outdoor environment temperature is less than or equal to default environment temperature, then the frosting on outdoor heat converter surface can not be melted automatically by outdoor environment temperature, then control air-conditioner and carry out defrost operation.When controlling air-conditioner and defrosting, automatically to enter the course of action that defrosts identical with air-conditioner, repeats no more.In addition, in control air-conditioner defrost process, can be reminded by the display board display defrosting information of air-conditioner, recognize to facilitate user the reason that air-conditioner still runs after receiving pass machine control signal, and not cannot shut down, avoid user to misunderstand.
In one embodiment of the invention, as shown in Figure 2, receive in judgement and close machine control signal space-time and adjust after device runs with heating mode, can also comprise:
S201, judges whether air-conditioner carries out Defrost operation.
If so, then enter step S202, otherwise enter step S203.
S202, if air-conditioner carries out Defrost operation, then controls air-conditioner shutdown after defrosting completes.
If judge that air-conditioner is carrying out defrosting action and not out of service immediately, but after continuing to execute defrosting action, control air-conditioner shutdown again, because now can think that outdoor heat converter surface frosting is more serious, continue to perform defrosting action, when can ensure air-conditioner unlatching next time heating mode, outdoor heat converter surface does not have frosting, improves the heating capacity of air-conditioner.
S203, if air-conditioner does not carry out Defrost operation, then judges whether the running time of air-conditioner is more than or equal to Preset Time.
Particularly, outdoor heat converter frosting usually occurs in air-conditioner and runs certain hour such as more than 12 minutes, air-conditioner to run in 12 minutes outdoor heat converter usually can not frosting, even if frosting also can be little, be easy to because of the balance of system pressure, frost melts be fallen after controlling air-conditioner shutdown, therefore judge to be less than the running time of air-conditioner Preset Time such as 12 minutes time, there is no need to carry out pressure defrosting, air-conditioner can be controlled and directly shut down.Such as, otherwise if be more than or equal to described Preset Time the running time of air-conditioner, air-conditioner runs Preset Time such as more than 12 minutes continuously, then perform step S3.
If judge to be more than or equal to Preset Time the running time of air-conditioner such as 12 minutes, now can obtain air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode and such as be set to TA, think that performing step S3 prepares, such as, obtain air-conditioner operates in outdoor heat converter outlet temperature in 7 minutes to 12 minutes sections continuously minimum of a value with heating mode.
Particularly, in one embodiment of the invention, as shown in Figure 3, judge whether the outlet temperature of outdoor heat converter meets frosting condition and specifically comprise:
S301, judges whether the outlet temperature of outdoor heat converter meets the first frosting condition.
If the outlet temperature of outdoor heat converter meets the first frosting condition, then perform step S4, if the outlet temperature of outdoor heat converter does not meet the first frosting condition, then perform step S302.Preset time period such as 7 minutes is run continuously in 12 minutes with heating mode at air-conditioner, the outlet temperature T of outdoor heat converter reflects the steady temperature of outdoor heat converter when non-frosting, therefore be benchmark with TA, after air-conditioner continues to run a period of time, if there is frosting to a certain degree in outdoor heat converter surface, the outlet temperature T of outdoor heat converter can decline on the basis of TA, therefore, frosting situation is reflected with the difference of TA and T, take into account the size of T simultaneously, if T comparatively large such as 2 DEG C, now think that outdoor heat converter does not have frosting, in order to the accuracy judged can perform step S302 further.If T is lower, such as, be less than-7 DEG C, the difference of TA and T is also such as greater than 3 DEG C comparatively greatly simultaneously, then think that there is frosting on outdoor heat converter surface, then judge outdoor environment temperature situation further, namely performs step S4.
Wherein, in one embodiment of the invention, the first frosting condition can meet:
T≤TB and TA-T >=TC, wherein,
T is the outlet temperature receiving outdoor heat converter when closing machine control signal, and TB is the first preset temperature, and TA is air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, and TC is that the first preset temperature is poor.Particularly, such as TB can be 0--7 DEG C, and preferably, TB can be-3--5 DEG C; TC can be 0.5-3 DEG C, and preferably, TC can be 1-2 DEG C.Such as, set TB as-4 DEG C, TC is 1.5 DEG C, if air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value TA with heating mode is-3 DEG C, the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-3.5 DEG C, do not meet the first above-mentioned frosting condition, can think that outdoor heat converter does not have frosting; In addition, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-7 DEG C, meet the first above-mentioned frosting condition, then can think that there is frosting on outdoor heat converter surface, then perform step S4, further consider whether outdoor environment temperature can make frosting automatically melt, concrete judgement such as the step S4 of outdoor environment temperature is described.
S302, judges whether the outlet temperature of outdoor heat converter meets the second frosting condition.
When judging that the outlet temperature of outdoor heat converter does not meet above-mentioned first frosting condition, in order to the accuracy judged can judge whether the outlet temperature of outdoor heat converter meets the second frosting condition further.If the outlet temperature of outdoor heat converter meets the second frosting condition, then perform step S4.
Wherein, in one embodiment of the invention, the second frosting condition meets:
T≤TD and TA-T >=TE, wherein,
T is the outlet temperature receiving outdoor heat converter when closing machine control signal, TD is the second preset temperature, second preset temperature is less than the first preset temperature, TA is air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, TE is that the second preset temperature is poor, usually in the shutdown moment, when the outlet temperature T of outdoor heat converter is lower, the surface also easier frosting of outdoor heat converter, if keep TE and TC equal, the frosting degree of outdoor heat converter then can be caused more serious, therefore to be less than the first preset temperature poor for the second preset temperature difference, i.e. TC>TE.Particularly, such as TD can be-3--10 DEG C, and preferably, TD can be-5--8 DEG C; TE can be 0.1-2.5 DEG C, and preferably, TE can be 0.5-1.0 DEG C.Such as, set TD as-7 DEG C, TE is 0.8 DEG C, if air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value TA with heating mode is-5 DEG C, the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-5.5 DEG C, do not meet the second above-mentioned frosting condition, can think that outdoor heat converter does not have frosting; In addition, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-9 DEG C, meet the second above-mentioned frosting condition, then can think that there is frosting on outdoor heat converter surface, then perform step S4, further consider whether outdoor environment temperature can make frosting automatically melt, concrete judgement such as the step S4 of outdoor environment temperature is described.
Particularly, in one embodiment of the invention, as shown in Figure 4, the detailed process judging to receive whether satisfied first frosting condition of outlet temperature of outdoor heat converter when closing machine control signal comprises:
S401, starts.
S402, detects the outlet temperature T receiving outdoor heat converter when closing machine control signal.
S403, judges whether to meet TA-T >=TC.
If met, perform step S404, otherwise perform step S408
S404, judges whether to meet T≤TB.
If met, perform step S405, otherwise perform step S408
S405, judges whether outdoor environment temperature meets T1≤TG.
If met, perform step S406, otherwise perform step S408
S406, forces defrosting.
S407, judges whether the defrosting action of outdoor heat converter completes.
If defrosting action completes, perform step S408, otherwise return step S406.
S408, shutdown.
In addition, in another specific embodiment of the present invention, as shown in Figure 5, the detailed process judging to receive whether satisfied second frosting condition of outlet temperature of outdoor heat converter when closing machine control signal comprises:
S501, starts.
S502, detects the outlet temperature T receiving outdoor heat converter when closing machine control signal.
S503, judges whether to meet TA-T >=TE.
If met, perform step S504, otherwise perform step S508
S504, judges whether to meet T≤TD.
If met, perform step S505, otherwise perform step S508
S505, judges whether outdoor environment temperature meets T1≤TG.
If met, perform step S506, otherwise perform step S508
S506, forces defrosting.
S507, judges whether the defrosting action of outdoor heat converter completes.
If defrosting action completes, perform step S508, otherwise return step S506.
S508, shutdown.
Further, in an embodiment of the present invention, under normal circumstances, first frosting condition and the second frosting condition can meet all situations that air-conditioner runs, but, very low such as-20 DEG C at outdoor environment temperature, the relative humidity of air is usual also very low, even if now outdoor heat converter frosting also can not be too many, although moment outdoor heat converter outlet temperature T is very low in shutdown, but T is very less than TA drop-out value, the first frosting condition and the second frosting condition cannot be met, but frosting now cannot melt automatically, therefore in one embodiment of the invention, as shown in Figure 3, can also comprise the following steps:
S303, when the outlet temperature of outdoor heat converter does not meet the second frosting condition, judges whether the outlet temperature of outdoor heat converter meets the 3rd frosting condition further.
Particularly, if the outlet temperature of outdoor heat converter meets the 3rd frosting condition, then step S4 is performed; If the outlet temperature of outdoor heat converter does not meet the 3rd frosting condition, then control air-conditioner shutdown.
Wherein, in one embodiment of the invention, the 3rd frosting condition meets:
T≤TF, wherein,
T is the outlet temperature receiving outdoor heat converter when closing machine control signal, and TF is the 3rd preset temperature, and the 3rd preset temperature is less than the second preset temperature.Particularly, such as TF can be-10--25 DEG C, and preferably, TF can be-15--18 DEG C.Such as, set TF as-17 DEG C, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-10 DEG C, do not meet the 3rd above-mentioned frosting condition, can think that outdoor heat converter does not have frosting, or frosting is less, then directly can control air-conditioner shutdown, even if there is frosting automatically to melt; In addition, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-20 DEG C, meet the 3rd above-mentioned frosting condition, then can think that outdoor heat converter has frosting, but in the case, after usual air-conditioner shutdown, frosting can not melt automatically, in order to prevent erroneous judgement, outdoor environment temperature can be further considered, namely step S4 is performed, consider whether outdoor environment temperature can make frosting automatically melt, concrete judgement such as the step S4 of outdoor environment temperature is described.
In one particular embodiment of the present invention, as shown in Figure 6, judge that receiving the whether satisfied 3rd frosting condition detailed process of the outlet temperature judging outdoor heat converter when closing machine control signal comprises:
S601, starts.
S602, detects the outlet temperature T accepting to receive outdoor heat converter when closing machine control signal.
S603, judges whether outlet temperature meets T≤TF.
If met, perform step S604, otherwise perform step S607.
S604, judges whether outdoor environment temperature meets T1≤TG
If it is perform step S605, otherwise perform step S607.
S605, controls air-conditioner and forces defrosting.
S606, judges whether the defrosting action of outdoor heat converter completes.
If defrosting action completes, perform step S607, otherwise return step S605.
S607, shutdown.
In conjunction with the air-conditioner defrost control process of the invention described above embodiment, can when air-conditioner receive the pass machine control signal of remote controller or control panel transmission, before automatic decision shutdown, whether air-conditioner is heating mode; If heating mode, then can judge whether the shutdown moment carries out defrosting action, if carry out defrosting action, then shuts down after having continued defrosting action again, if do not carry out defrosting action, then can judge the frosting situation of outdoor heat converter.When outdoor heat converter does not have frosting, can automatic shutdown, if when outdoor heat converter has a frosting to a certain degree, outdoor environment temperature can be judged further.If when outdoor environment temperature does not meet pressure defrosting condition, directly shut down, if when outdoor environment temperature meets pressure defrosting condition, carry out pressure defrosting, shutdown after forcing defrosting to complete.Adopt the air-conditioner defrosting control method of the embodiment of the present invention, can make air-conditioner after running shutdown with heating mode, if outdoor heat converter there is frosting to a certain degree, and time this frosting can not melt automatically, take force defrosting action, the frost melts on outdoor heat converter is fallen, thus ensure upper once start heat time, outdoor heat converter there is no the impact of frosting, improve heating capacity and accelerate the speed hot blast.
In sum, according to the air-conditioner defrosting control method of the embodiment of the present invention, when air-conditioner shuts down with heating mode end of run, by the relation of the outlet temperature and frosting condition that judge outdoor heat converter, and consider outdoor environment temperature, control air-conditioner to defrost, it is more accurate to judge the frosting situation of the outdoor heat converter of air-conditioner, the problem that there will not be frostless defrost and have frost can't check, and, by considering outdoor environment temperature, in outdoor heat converter frosting, but when can be melted by environment temperature, no longer control air-conditioner to defrost, control more intelligent, unnecessary waste of energy can be avoided.
A kind of air-conditioner that embodiment according to a further aspect in the invention proposes is described with reference to the accompanying drawings.
Fig. 7 is the block diagram of air-conditioner according to an embodiment of the invention.As shown in Figure 7, the air-conditioner 100 of the embodiment of the present invention comprises temperature detector 10 and controller 20.When receiving pass machine control signal, temperature detector 10 detects outlet temperature and the outdoor environment temperature of the outdoor heat converter of air-conditioner 100; Controller 20 is for judging that receiving pass machine control signal space-time adjusts device 100 whether to run with heating mode, and when air-conditioner 100 runs with heating mode, judge whether the outlet temperature of outdoor heat converter meets frosting condition further, and when the outlet temperature of outdoor heat converter meets frosting condition, judge whether outdoor environment temperature is less than or equal to default environment temperature further, and when outdoor environment temperature is less than or equal to default environment temperature, controls air-conditioner 100 and defrost.
Particularly, wherein, the pass machine control signal of reception can be sent by remote controller key, or is sent by air-conditioner 100 panel operation, and then temperature detector 10 obtains the outlet temperature of now outdoor heat converter, and now outdoor environment temperature.After air-conditioner 100 receives the pass machine control signal exported by remote controller or control panel, first air-conditioner 100 carries out the judgement of present mode of operation, device 100 is adjusted to run with non-heating mode when judgement receives pass machine control signal space-time, such as now air-conditioner 100 runs in a chiller mode, then outdoor heat converter temperature is higher, impossible frosting, then directly can control air-conditioner 100 and directly shut down.
If controller 20 judges that air-conditioner 100 runs with heating mode, outdoor interchanger temperature is lower, do not carry out the just shutdown of process in time, likely outdoor exchanger surfaces frosting, so in order to keep the heating effect of air-conditioner 100 when next time starts shooting, prevent outdoor heat converter surface frosting, controller 20 can judge whether the outlet temperature of outdoor heat converter meets frosting condition, is described in detail below concrete determining step further.If the outlet temperature of outdoor heat converter does not meet frosting condition, then can think that the surface of outdoor heat converter does not have frosting or frosting seldom, can automatically melt.
If the outlet temperature of outdoor heat converter meets frosting condition, namely tentatively can think and need before being powered off to defrost, further consider whether outdoor environment temperature can melt frosting automatically, such as, judge whether outdoor environment temperature T1 is less than or equal to defrosting and judges that temperature such as presets environment temperature TG, if meet T1≤TG, then perform step S5, if T1>TG, think and the frosting on outdoor heat converter surface can be melted automatically by outdoor environment temperature, then control air-conditioner 100 and directly shut down.Wherein, preset environment temperature TG and can be set as-1 ~ 3 DEG C, preferred scope can be 1 ~ 2 DEG C.Such as, when judging that the outlet temperature of outdoor heat converter meets frosting condition, namely when there is to a certain degree a frosting on outdoor heat converter surface, pressure defrosting may not be carried out, such as when outdoor environment temperature be greater than default environment temperature such as 0 DEG C time, even if there is frosting on outdoor heat converter surface, also automatically can melt because of outdoor environment temperature, if still carry out pressure defrosting in the case, unnecessary electric energy can be consumed.
When outdoor environment temperature is less than or equal to default environment temperature, then the frosting on outdoor heat converter surface can not be melted automatically by outdoor environment temperature, then control air-conditioner 100 and carry out defrost operation.When controlling air-conditioner 100 and defrosting, automatically to enter the course of action that defrosts identical with air-conditioner 100, repeats no more.In addition, in control air-conditioner 100 defrost process, can be reminded by the display board display defrosting information of air-conditioner 100, recognize to facilitate user the reason that air-conditioner 100 still runs after receiving pass machine control signal, and not cannot shut down, avoid user to misunderstand.
In one embodiment of the invention, controller 20 is also for judging whether air-conditioner 100 carries out Defrost operation, when air-conditioner 100 carries out Defrost operation, after defrosting completes, then control air-conditioner 100 shut down, because now can think that outdoor heat converter surface frosting relatively seriously, continue to perform defrosting action, when can ensure air-conditioner 100 unlatching next time heating mode, outdoor heat converter surface does not have frosting, improves the heating capacity of air-conditioner 100.
Do not start Defrost operation at air-conditioner 100, then judge whether the running time of air-conditioner 100 is more than or equal to Preset Time further.Particularly, outdoor heat converter frosting usually occurs in air-conditioner 100 and runs certain hour such as more than 12 minutes, air-conditioner 100 to run in 12 minutes outdoor heat converter usually can not frosting, even if frosting also can be little, be easy to because of the balance of system pressure, frost melts be fallen after controlling air-conditioner 100 and shutting down, therefore judge to be less than the running time of air-conditioner 100 Preset Time such as 12 minutes time, there is no need to carry out pressure defrosting, air-conditioner 100 can be controlled and directly shut down.Otherwise, air-conditioner 100 runs Preset Time such as more than 12 minutes continuously, now can obtain air-conditioner 100 runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode and such as be set to TA, think and judge whether that meeting frosting condition prepares, such as, obtain air-conditioner 100 operates in outdoor heat converter outlet temperature in 7 minutes to 12 minutes sections continuously minimum of a value with heating mode.
Frosting condition can comprise the first frosting condition and the second frosting condition.In one embodiment of the invention, controller 20 is also for judging whether the outlet temperature of outdoor heat converter meets the first frosting condition, and when outdoor heat converter does not meet the first frosting condition, judge whether outdoor heat converter meets the second frosting condition further.Particularly, preset time period such as 7 minutes is run continuously in 12 minutes with heating mode at air-conditioner 100, the outlet temperature T of outdoor heat converter reflects the steady temperature of outdoor heat converter when non-frosting, therefore be benchmark with TA, after air-conditioner 100 continues to run a period of time, if there is frosting to a certain degree in outdoor heat converter surface, the outlet temperature T of outdoor heat converter can decline on the basis of TA, therefore, frosting situation is reflected with the difference of TA and T, take into account the size of T simultaneously, if T comparatively large such as 2 DEG C, now think that outdoor heat converter does not have frosting, can hold further in order to the accuracy judged and judge whether satisfied second frosting condition.If T is lower, such as, be less than-7 DEG C, the difference of TA and T is also such as greater than 3 DEG C comparatively greatly simultaneously, then think that there is frosting on outdoor heat converter surface, then judge outdoor environment temperature situation further.
Wherein, in one embodiment of the invention, the first frosting condition can meet:
T≤TB and TA-T >=TC, wherein,
T is the outlet temperature receiving outdoor heat converter when closing machine control signal, and TB is the first preset temperature, and TA is air-conditioner 100 runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, and TC is that the first preset temperature is poor.Particularly, such as TB can be 0--7 DEG C, and preferably, TB can be-3--5 DEG C; TC can be 0.5-3 DEG C, and preferably, TC can be 1-2 DEG C.Such as, set TB as-4 DEG C, TC is 1.5 DEG C, if air-conditioner 100 runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value TA with heating mode is-3 DEG C, the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-4 DEG C, do not meet the first above-mentioned frosting condition, can think that outdoor heat converter does not have frosting; In addition, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-7 DEG C, meet the first above-mentioned frosting condition, then can think that there is frosting on outdoor heat converter surface, then further consider whether outdoor environment temperature can make frosting automatically melt, described above to the concrete judgement of outdoor environment temperature.
When controller 20 judges that the outlet temperature of outdoor heat converter does not meet above-mentioned first frosting condition, in order to the accuracy judged can judge whether the outlet temperature of outdoor heat converter meets the second frosting condition further.If the outlet temperature of outdoor heat converter meets the second frosting condition, further consider whether outdoor environment temperature can make frosting automatically melt.
Wherein, in one embodiment of the invention, the second frosting condition meets:
T≤TD and TA-T >=TE, wherein,
T is the outlet temperature receiving outdoor heat converter when closing machine control signal, TD is the second preset temperature, second preset temperature is less than the first preset temperature, TA is air-conditioner 100 runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, TE is that the second preset temperature is poor, usually in the shutdown moment, when the outlet temperature T of outdoor heat converter is lower, the surface also easier frosting of outdoor heat converter, if keep TE and TC equal, the frosting degree of outdoor heat converter then can be caused more serious, therefore to be less than the first preset temperature poor for the second preset temperature difference, i.e. TC>TE.Particularly, such as TD can be-3--10 DEG C, and preferably, TD can be-5--8 DEG C; TE can be 0.1-2.5 DEG C, and preferably, TE can be 0.5-1.0 DEG C.Such as, set TD as-7 DEG C, TE is 0.8 DEG C, if air-conditioner 100 runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value TA with heating mode is-5 DEG C, the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-6 DEG C, do not meet the second above-mentioned frosting condition, can think that outdoor heat converter does not have frosting; In addition, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-9 DEG C, meet the second above-mentioned frosting condition, then can think that there is frosting on outdoor heat converter surface, then further consider whether outdoor environment temperature can make frosting automatically melt, described above to the concrete judgement of outdoor environment temperature.
Further, in an embodiment of the present invention, under normal circumstances, first frosting condition and the second frosting condition can meet all situations that air-conditioner 100 runs, but, very low such as-20 DEG C at outdoor environment temperature, the relative humidity of air is usual also very low, even if now outdoor heat converter frosting also can not be too many, although moment outdoor heat converter outlet temperature T is very low in shutdown, but T is very less than TA drop-out value, the first frosting condition and the second frosting condition cannot be met, therefore in one embodiment of the invention, controller 20 is not also for when the outlet temperature of outdoor heat converter meets the second frosting condition, whether the further outlet temperature judging outdoor heat converter meets the 3rd frosting condition.
Particularly, if the outlet temperature of outdoor heat converter meets the 3rd frosting condition, then the situation of outdoor environment temperature is further considered; If the outlet temperature of outdoor heat converter does not meet the 3rd frosting condition, then control air-conditioner 100 and shut down.
Wherein, in one embodiment of the invention, the 3rd frosting condition meets:
T≤TF, wherein,
T is the outlet temperature receiving outdoor heat converter when closing machine control signal, and TF is the 3rd preset temperature, and the 3rd preset temperature is less than the second preset temperature.Particularly, such as TF can be-10--25 DEG C, and preferably, TF can be-15--18 DEG C.Such as, set TF as-17 DEG C, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-10 DEG C, do not meet the 3rd above-mentioned frosting condition, can think that outdoor heat converter does not have frosting, or frosting is less, then directly can controls air-conditioner 100 and shut down, even if there is frosting automatically to melt; In addition, if the outlet temperature of the outdoor heat converter detected when receiving and closing machine control signal is-20 DEG C, meet the 3rd above-mentioned frosting condition, then can think that outdoor heat converter has frosting, but in the case, after usual air-conditioner 100 shuts down, frosting can not melt automatically, in order to prevent erroneous judgement, can outdoor environment temperature be further considered, namely consider whether outdoor environment temperature can make frosting automatically melt, and as above specifically describes the concrete judgement of outdoor environment temperature.
In sum, according to the air-conditioner of the embodiment of the present invention, when air-conditioner shuts down with heating mode end of run, the outlet temperature of outdoor heat converter and the relation of frosting condition is judged by controller, and consider outdoor environment temperature, control air-conditioner to defrost, it is more accurate to judge the frosting situation of the outdoor heat converter of air-conditioner, the problem that there will not be frostless defrost and have frost can't check, and, by considering outdoor environment temperature, in outdoor heat converter frosting, but when can be melted by environment temperature, no longer control air-conditioner to defrost, control more intelligent, unnecessary waste of energy can be avoided.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (14)
1. an air-conditioner defrosting control method, is characterized in that, comprises the following steps:
S1, when receiving pass machine control signal, detects outlet temperature and the outdoor environment temperature of the outdoor heat converter of air-conditioner;
Whether S2, judge to receive described air-conditioner when closing machine control signal and run with heating mode;
S3, if described air-conditioner runs with heating mode, then judges whether the outlet temperature of described outdoor heat converter meets frosting condition further;
S4, if the outlet temperature of described outdoor heat converter meets frosting condition, then judges whether described outdoor environment temperature is less than or equal to default environment temperature further;
S5, if described outdoor environment temperature is less than or equal to described default environment temperature, then controls described air-conditioner and defrosts.
2. air-conditioner defrosting control method as claimed in claim 1, is characterized in that, when judging to receive pass machine control signal, described air-conditioner also comprises after running with heating mode:
Judge whether described air-conditioner carries out Defrost operation;
If described air-conditioner carries out Defrost operation, then after defrosting completes, control the shutdown of described air-conditioner;
If described air-conditioner does not carry out Defrost operation, then judge whether the running time of described air-conditioner is more than or equal to Preset Time;
If the running time of described air-conditioner is more than or equal to described Preset Time, then perform step S3.
3. air-conditioner defrosting control method as claimed in claim 1, is characterized in that, judge whether the outlet temperature of described outdoor heat converter meets frosting condition and specifically comprise:
Judge whether the outlet temperature of described outdoor heat converter meets the first frosting condition;
If the outlet temperature of described outdoor heat converter meets the first frosting condition, then perform step S4;
If the outlet temperature of described outdoor heat converter does not meet the first frosting condition, then judge whether the outlet temperature of described outdoor heat converter meets the second frosting condition further;
If the outlet temperature of described outdoor heat converter meets the second frosting condition, then perform step S4.
4. air-conditioner defrosting control method as claimed in claim 3, is characterized in that, described first frosting condition meets:
T≤TB and TA-T >=TC, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, TB is the first preset temperature, TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, and TC is that the first preset temperature is poor.
5. air-conditioner defrosting control method as claimed in claim 3, is characterized in that, described second frosting condition meets:
T≤TD and TA-T >=TE, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, TD is the second preset temperature, described second preset temperature is less than described first preset temperature, TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, TE is that the second preset temperature is poor, and it is poor that described second preset temperature difference is less than described first preset temperature.
6. air-conditioner defrosting control method as claimed in claim 3, is characterized in that, also comprise:
When the outlet temperature of described outdoor heat converter does not meet the second frosting condition, judge whether the outlet temperature of described outdoor heat converter meets the 3rd frosting condition further;
If the outlet temperature of described outdoor heat converter meets the 3rd frosting condition, then perform step S4;
If the outlet temperature of described outdoor heat converter does not meet the 3rd frosting condition, then control the shutdown of described air-conditioner.
7. air-conditioner defrosting control method as claimed in claim 6, is characterized in that, described 3rd frosting condition meets:
T≤TF, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, and TF is the 3rd preset temperature, and described 3rd preset temperature is less than described second preset temperature.
8. an air-conditioner, is characterized in that, comprising:
Temperature detector, when receiving pass machine control signal, described temperature detector detects outlet temperature and the outdoor environment temperature of the outdoor heat converter of air-conditioner;
Controller, described controller be used for judgement receive close machine control signal time described air-conditioner whether run with heating mode, and when described air-conditioner runs with heating mode, judge whether the outlet temperature of described outdoor heat converter meets frosting condition further, and when the outlet temperature of described outdoor heat converter meets frosting condition, judge whether described outdoor environment temperature is less than or equal to default environment temperature further, and be less than or equal to described default environment temperature at outdoor environment temperature, control described air-conditioner and defrost.
9. air-conditioner as claimed in claim 8, it is characterized in that, described controller is also for judging whether described air-conditioner carries out Defrost operation, when described air-conditioner carries out Defrost operation, after defrosting completes, then control the shutdown of described air-conditioner, and do not start Defrost operation at described air-conditioner, then judge whether the running time of described air-conditioner is more than or equal to Preset Time further.
10. air-conditioner as claimed in claim 8, it is characterized in that, described controller is also for judging whether the outlet temperature of described outdoor heat converter meets the first frosting condition, and when described outdoor heat converter does not meet the first frosting condition, judge whether described outdoor heat converter meets the second frosting condition further.
11. air-conditioners as claimed in claim 10, is characterized in that, described first frosting condition meets:
T≤TB and TA-T >=TC, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, TB is the first preset temperature, TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, and TC is that the first preset temperature is poor.
12. air-conditioners as claimed in claim 10, is characterized in that, described second frosting condition meets:
T≤TD and TA-T >=TE, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, TD is the second preset temperature, described second preset temperature is less than described first preset temperature, TA is described air-conditioner runs the outlet temperature of outdoor heat converter in preset time period continuously minimum of a value with heating mode, TE is that the second preset temperature is poor, and it is poor that described second preset temperature difference is less than described first preset temperature.
13. air-conditioners as claimed in claim 10, it is characterized in that, described controller, also for when the outlet temperature of described outdoor heat converter does not meet the second frosting condition, judges whether the outlet temperature of described outdoor heat converter meets the 3rd frosting condition further.
14. air-conditioners as claimed in claim 13, is characterized in that, described 3rd frosting condition meets:
T≤TF, wherein,
T is the outlet temperature receiving described outdoor heat converter when closing machine control signal, and TF is the 3rd preset temperature, and described 3rd preset temperature is less than described second preset temperature.
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