CN102226608A - Air conditioner defrosting system, air conditioner and air conditioner defrosting method - Google Patents
Air conditioner defrosting system, air conditioner and air conditioner defrosting method Download PDFInfo
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- CN102226608A CN102226608A CN2011101065599A CN201110106559A CN102226608A CN 102226608 A CN102226608 A CN 102226608A CN 2011101065599 A CN2011101065599 A CN 2011101065599A CN 201110106559 A CN201110106559 A CN 201110106559A CN 102226608 A CN102226608 A CN 102226608A
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Abstract
The invention provides an air conditioner defrosting system which comprises a defrosting judgment module, a first defrosting control module and a second defrosting control module, wherein the defrosting judgment module outputs a first defrosting command of defrosting the bottom of an outdoor unit of an air conditioner or a second defrosting command of defrosting the whole of the outdoor unit of the air conditioner; the first defrosting control module responses to the first defrosting command and controls the air conditioner to be in a first defrosting operation mode for defrosting the bottom of the outdoor unit; and the second defrosting control module responses to the second defrosting command and controls the air conditioner to be in a second defrosting operation mode for defrosting the whole of the outdoor unit. On the other hand, the invention also provides an air conditioner with the defrosting system provided by the invention. Furthermore, the invention also provides a defrosting method of the air conditioner provided by the invention. Compared with the prior art, the air conditioner defrosting system provided by the invention adjusts the opening of the electronic expansion valve of the air conditioner and utilizes the temperature of a refrigerant to defrost the bottom of the outdoor unit under the heating operation mode of the air conditioner and effectively improves the defrosting effect, thereby improving the heating performance of the air conditioner.
Description
Technical field
The present invention relates to household appliance technical field, relate in particular to a kind of air-conditioner defrost system, air-conditioner and air-conditioner Defrost method.
Background technology
In the winter time under the situation that outdoor temperature is very low, when air-conditioner heats, the easy frosting of off-premises station.The bigger area of humidity in the winter time particularly, the off-premises station bottom freezes especially easily, thereby influences the heating effect of air-conditioner.In present air-conditioner Defrost method, mostly adopt the whole Defrost operation pattern of carrying out at the integral body of air-conditioner outdoor unit, promptly, by cross valve is commutated, make air-conditioner change cooling operation mode over to from the heating operation mode, indoor set and off-premises station blower fan are out of service simultaneously, have only compressor operating, and defrosting finishes the back air-conditioner and reenters the heating operation mode.
For the defrosting effect that improves air-conditioner improving the heating performance of air-conditioner, normally improve shortening on the defrosting time in the prior art.For example in Chinese patent 200610145467.0, disclose a kind of air-conditioner defrosting method, comprised 1) between compressor exhaust pipe and condenser air inlet pipe, increase by a pipeline in advance, and on described pipeline, magnetic valve is set; 2) detect condenser coil temperature and outdoor environment temperature; 3) according to described condenser coil temperature and outdoor environment temperature, judge whether to enter Defrost operation; If enter Defrost operation execution in step 4, otherwise execution in step 2; 4) the control magnetic valve is opened, and the control compressor frequency is reduced to first predetermined value, and the commutation of control four-way change-over valve changes refrigerating operaton over to; 5) the control compressor is pressed indoor set and is pressed the first set rate raising frequency until second predetermined value; 6) judge whether condenser temperature satisfies the defrosting condition that withdraws from, if satisfy execution in step 7; Otherwise execution in step 5; 7) close magnetic valve, the control compressor is downconverted to the 3rd predetermined value by second set rate, and the control four-way change-over valve transfers heating operation to.
For the natural environment that is unfavorable for operation of air conditioner, the bigger area of for example aforesaid humidity in winter is because off-premises station bottom running environment badly causes freezing in the bottom of off-premises station probably.This moment above-mentioned this shortening defrosting cycle method, be not very desirable to the improvement of defrosting effect, because thicker frost and the ice of knot in the off-premises station bottom is not easy to melt in defrosting cycle.And each defrosting removes sordid consequence, is that defrosting effect worse and worse along with the ice of knot is more and more.Also can produce more and more adverse influence to the heating performance of air-conditioner thereupon.Under this situation, except carrying out also needing to be defrosted specially in the bottom of off-premises station the integral body defrosting to the integral body of air-conditioner outdoor unit.
Summary of the invention
At the problem that exists in the correlation technique, the object of the present invention is to provide a kind of air-conditioner defrost system and air-conditioner Defrost method, to solve defrosting sordid problem in off-premises station bottom in the prior art.
For achieving the above object, the invention provides a kind of defrost system of air-conditioner, comprising:
The defrosting judge module, in response to the number of times signal that the integral body of the off-premises station of air-conditioner is carried out the signal of whole defrosting and carried out whole defrosting, or in response to the transient temperature value of the off-premises station of air-conditioner and the comparative result of set temperature value, the first defrosting instruction that output defrosts to the bottom of air-conditioner outdoor unit, or the second defrosting instruction that the integral body of the off-premises station of air-conditioner is defrosted;
The first defrosting control module, in response to the first defrosting instruction, the control air-conditioner enters the first Defrost operation pattern that is defrosted in the bottom of off-premises station; And
The second defrosting control module, in response to the second defrosting instruction, the control air-conditioner enters the second Defrost operation pattern that the integral body to off-premises station defrosts.
Preferably, under the first Defrost operation pattern, the aperture of the electric expansion valve of air-conditioner reaches maximum.
Preferably, the defrosting judge module further comprises:
Monitoring modular according to the running time of air-conditioner and the transient temperature value of off-premises station, sends the signal that the integral body to the off-premises station of air-conditioner defrosts; And
Counting module when the number of times that in setting-up time the integral body of the off-premises station of air-conditioner is defrosted reaches set point number, sends the number of times signal of whole defrosting.
On the other hand, the invention provides a kind of air-conditioner, it has the defrost system of above-mentioned air-conditioner.
On the one hand, the present invention also provides a kind of Defrost method of air-conditioner, may further comprise the steps again:
Preferably, the second Defrost operation pattern changes the Defrost operation pattern of cooling operation mode over to from the heating operation mode for air-conditioner; The first Defrost operation pattern is for air-conditioner is in Defrost operation pattern under the heating operation mode; Wherein, under the first Defrost operation pattern, the aperture of electric expansion valve reaches maximum.
Preferably, Defrost method further comprises:
According to the running time of air-conditioner and the transient temperature value of off-premises station, monitoring modular sends the signal that the integral body to the off-premises station of air-conditioner defrosts; And
When the number of times that in setting-up time the integral body of the off-premises station of air-conditioner is defrosted reached set point number, counting module sent the number of times signal of whole defrosting.
Preferably, described counting module is set at: when within two hours the integral body of off-premises station being carried out three whole defrostings, send the number of times signal of whole defrosting.
Preferably, Defrost method further comprises: when the transient temperature value of off-premises station during less than set temperature value, and the defrosting judge module output first defrosting instruction; When the transient temperature value of off-premises station during more than or equal to set temperature value, the defrosting judge module output second defrosting instruction.
Preferably, set temperature value is set according to the size of described air-conditioner power and the installation site of defrosting sensor on off-premises station of air-conditioner.
Than prior art, the invention has the beneficial effects as follows: the present invention is under the air conditioner heat-production method of operation, the aperture of the electric expansion valve by adjusting air-conditioner, make the on high-tension side high temperature refrigerant of compressor directly arrive the bottom of off-premises station, utilize the temperature of refrigerant self to be defrosted in the off-premises station bottom.Take this, relatively poor when the natural environmental condition of air-conditioner outdoor unit operation, when causing frosting ice formation issues in bottom serious, increase the process that is defrosted in the bottom of off-premises station, will effectively improve defrosting effect, and then improve the heating performance of air-conditioner.
Description of drawings
Fig. 1 is the structure principle chart of air-conditioner of the present invention, and the refrigerant flow path under the heating operation mode is shown;
Fig. 2 is the flow chart of air-conditioner Defrost method of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described.
The invention provides a kind of defrost system of air-conditioner.
With reference to figure 1, under the heating operation pattern of air-conditioner, refrigerant flows along the direction of the arrow indication among Fig. 1.That is, refrigerant flows out from the high-pressure side of compressor 5, flow to indoor set 1 through cross valve 4, is liquefied by gaseous state, and release heat improves the temperature of room air; Next, the refrigerant of liquefaction through the heat exchange reaction of off-premises station 2, is returned the low-pressure side of compressor 5 again after the gasification after electric expansion valve 3 places are by throttling, finish heating circulation.Wherein, on off-premises station 2, defrosting sensor (not shown) is installed, is used for transmitting to defrost system in real time the transient temperature value T of off-premises station 2
E
The defrost system of air-conditioner of the present invention comprises defrosting judge module, the first defrosting control module and the second defrosting control module.The defrosting judge module sends the first defrosting instruction that is defrosted in the bottom of off-premises station 2 in response to signal conditioning, or the second defrosting instruction that the integral body of off-premises station 2 is defrosted.Wherein, receive when the integral body of the off-premises station 2 of air-conditioner carried out the signal of whole defrosting and carry out the number of times signal of whole defrosting the defrosting judge module output first defrosting instruction simultaneously when the defrosting judge module; When the defrosting judge module receives only when the integral body of the off-premises station 2 of air-conditioner carried out the signal of whole defrosting the defrosting judge module output second defrosting instruction; During off-premises station 2 carried out bottom defrosting, the defrosting sensor still transmitted the transient temperature value T of off-premises station 2 in real time to defrost system
E, as the transient temperature value T of off-premises station 2
ELess than set temperature value T
0The time, the defrosting judge module output first defrosting instruction; Transient temperature value T when off-premises station 2
EMore than or equal to set temperature value T
0The time, the defrosting judge module output second defrosting instruction.
In response to the above-mentioned first defrosting instruction, the first defrosting control module control air-conditioner enters the first Defrost operation pattern, being defrosted in the bottom of off-premises station 2.That is, under the heating operation mode of air-conditioner, the aperture of the first defrosting control module control electric expansion valve 3 is opened greatly.Preferred embodiment is, the aperture of electric expansion valve 3 is reached maximum, and so, refrigerant no longer is subjected to the throttling of electric expansion valve 3, the refrigerant that flows out from the high-pressure side of compressor 5 directly arrives the bottom of off-premises station 2 behind cross valve 4, indoor set 1 and electric expansion valve 3.Like this, can utilize the temperature of high temperature refrigerant thoroughly to be defrosted in the bottom of off-premises station 2.
In response to the above-mentioned second defrosting instruction, the second defrosting control module control air-conditioner enters the second Defrost operation pattern, defrosts with the integral body to off-premises station 2.That is, the second defrosting control module control air-conditioner changes cooling operation mode over to from the heating operation mode, cross valve 4 commutations, and indoor set 1 and off-premises station 2 blower fans are out of service simultaneously, have only compressor 5 operations.After this integral body defrost process was finished, air-conditioner reentered the heating operation mode.To the second Defrost operation pattern that the integral body of air-conditioner defrosts, those skilled in the art can be known from prior art.
According to above-mentioned, the present invention is under the air conditioner heat-production method of operation, the aperture of the electric expansion valve 3 by adjusting air-conditioner makes the on high-tension side high temperature refrigerant of compressor 5 directly arrive the bottom of off-premises station 2, utilizes the temperature of refrigerant self to be defrosted in off-premises station 2 bottoms.By this, relatively poor when the natural environmental condition of air-conditioner outdoor unit 2 operations, when causing frosting ice formation issues in bottom serious, increase the process that is defrosted in the bottom of off-premises station 2, will effectively improve defrosting effect, and then improve the heating performance of air-conditioner.
In addition, the defrosting judge module further comprises monitoring modular and counting module.Monitoring modular wherein is according to the running time of air-conditioner and the transient temperature value T of off-premises station 2
E, send the signal that the integral body of foregoing off-premises station 2 to air-conditioner defrosts; When the number of times that in setting-up time the integral body of the off-premises station 2 of air-conditioner is defrosted reached set point number, counting module sent the number of times signal of foregoing whole defrosting.When the operation conditions of air-conditioner has satisfied when off-premises station 2 carried out the condition of whole defrosting, if counting module has also sent the number of times signal of whole defrosting simultaneously, air-conditioner will carry out bottom to off-premises station 2 and defrost.Then, the defrosting judge module output first defrosting instruction, the first defrosting control module control air-conditioner enters the above-mentioned first Defrost operation pattern that is defrosted in the bottom of off-premises station 2.And satisfied when the operation conditions of air-conditioner under the situation of the condition of off-premises station 2 being carried out whole defrosting, counting module does not send the number of times signal of whole defrosting, then, the defrosting judge module output second defrosting instruction, the second defrosting control module control air-conditioner enters the second Defrost operation pattern that above-mentioned integral body to off-premises station 2 defrosts.
On the other hand, the present invention also provides a kind of Defrost method of air-conditioner, with reference to figure 2, may further comprise the steps:
The defrosting judge module receives the signal of monitoring modular and counting module.Monitoring modular is according to the running time of air-conditioner and the transient temperature value T of off-premises station 2
E, the signal of whole defrosting is carried out in transmission to the integral body of the off-premises station 2 of air-conditioner; When the number of times that in setting-up time the integral body of the off-premises station 2 of air-conditioner is defrosted reached set point number, counting module sent the number of times signal that carries out whole defrosting.Wherein, the condition that the integral body of the off-premises station 2 of air-conditioner is carried out whole defrosting can just be set according to the time length of heating operation and/or the temperature of off-premises station 2.
When the operation conditions of air-conditioner has satisfied when off-premises station 2 carried out the condition of whole defrosting, if counting module has also sent the number of times signal of whole defrosting simultaneously, air-conditioner will carry out bottom to off-premises station 2 and defrost.For example, according to a preferred embodiment of the invention, counting module is set at, when within two hours the integral body of off-premises station 2 being carried out three whole defrostings, sends the number of times signal of whole defrosting.That is, the operation conditions of air-conditioner has satisfied carries out under the situation of the whole condition that defrosts off-premises station 2, within two hours the integral body of off-premises station 2 being carried out the whole number of times that defrosts has reached again three times that set, the frequent degree that the defrosting of air-conditioner is described has exceeded normal range (NR), the running environment of off-premises station 2 is relatively poor, and frosting or icing degree are more serious.Then, the defrosting judge module output first defrosting instruction.Otherwise, satisfied when the operation conditions of air-conditioner under the situation of the condition of off-premises station 2 being carried out whole defrosting, within two hours the integral body of off-premises station 2 being carried out the whole number of times that defrosts has not reached twice that sets, for example only once or twice o'clock, counting module just can not send the number of times signal of whole defrosting, then, the defrosting judge module output second defrosting instruction.
If the defrosting judge module output first defrosting instruction enters step 2; If the output second defrosting instruction enters step 3.
According to embodiments of the invention, the first Defrost operation pattern is moved under the heating operation mode.That is, under the heating operation mode of air-conditioner, the aperture of the first defrosting control module control electric expansion valve 3 is opened greatly, and preferred embodiment is, the aperture of electric expansion valve 3 is reached maximum.So, refrigerant no longer is subjected to the throttling of electric expansion valve 3, and the refrigerant that flows out from the high-pressure side of compressor 5 directly arrives the bottom of off-premises station 2 behind cross valve 4, indoor set 1 and electric expansion valve 3.Like this, can utilize the temperature of high temperature refrigerant thoroughly to be defrosted in the bottom of off-premises station 2.According to embodiments of the invention, on the off-premises station 2 of air-conditioner, the interface of the refrigerant pipeline 6 of a side that is connected with electric expansion valve 3 is positioned at the bottom of off-premises station 2.Like this, open when big when the aperture of electric expansion valve 3, the refrigerant of high temperature can as often as possible at first arrive the bottom of off-premises station 2, to guarantee the bottom defrosting effect.
Further, under this pattern, in response to the transient temperature value T of the off-premises station 2 of air-conditioner
EWith set temperature value T
0Comparative result, the defrosting judge module is exported the first defrosting instruction or the second defrosting instruction once more.Wherein, set temperature value T
0Size and the installation site of defrosting sensor on off-premises station 2 according to air-conditioner power are set.For example, when the defrosting sensor is installed in position near the bottom of off-premises station 2, if the T of 2 air-conditioner
0Be set at-1 ℃, then the T of 3 air-conditioner
0Can be set at 0 ℃ to 0.5 ℃.
During off-premises station 2 carried out bottom defrosting, the defrosting sensor still transmitted the transient temperature value T of off-premises station 2 in real time to defrost system
ETransient temperature value T when off-premises station 2
EMore than or equal to set temperature value T
0The time, the defrosting judge module output second defrosting instruction.Because, as the transient temperature value T of off-premises station 2
EWhen reaching preset value, illustrate that the purpose of bottom defrosting reaches, the running environment of off-premises station 2 is improved, and then the operational mode that is defrosted in the bottom of off-premises station 2 can be converted to the whole Defrost operation pattern that the integral body to off-premises station 2 defrosts.And as the transient temperature value T of off-premises station 2
ELess than set temperature value T
0The time, illustrating that bottom Defrost operation pattern does not also reach default effect, the judge module that then the defrosts output first defrosting instruction still defrosts to the bottom of off-premises station 2.That is to say, if the defrosting judge module output first defrosting instruction then continues execution in step 2; If the output second defrosting instruction enters step 3.
According to embodiments of the invention, the second Defrost operation pattern is air-conditioner changes cooling operation mode over to from the heating operation mode a Defrost operation pattern.That is, the second defrosting control module control air-conditioner changes cooling operation mode over to from the heating operation mode, cross valve 4 commutations, and indoor set 1 and off-premises station 2 blower fans are out of service simultaneously, have only compressor 5 operations.After this integral body defrost process was finished, air-conditioner reentered the heating operation mode.For this second Defrost operation pattern, those skilled in the art can be known from prior art.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the defrost system of an air-conditioner is characterized in that, described defrost system comprises:
The defrosting judge module, in response to the number of times signal that the integral body of the off-premises station (2) of described air-conditioner is carried out the signal of whole defrosting and carried out described whole defrosting, or in response to the transient temperature value (T of the off-premises station (2) of described air-conditioner
E) and set temperature value (T
0) comparative result, the first defrosting instruction that output defrosts to the bottom of described air-conditioner outdoor unit (2), or the second defrosting instruction that the integral body of the off-premises station (2) of described air-conditioner is defrosted;
The first defrosting control module in response to the described first defrosting instruction, is controlled described air-conditioner and is entered the first Defrost operation pattern that is defrosted in the bottom of described off-premises station (2); And
The second defrosting control module in response to the described second defrosting instruction, is controlled described air-conditioner and is entered the second Defrost operation pattern that the integral body to described off-premises station (2) defrosts.
2. the defrost system of air-conditioner according to claim 1 is characterized in that, under the described first Defrost operation pattern, the aperture of the electric expansion valve of described air-conditioner (3) reaches maximum.
3. the defrost system of air-conditioner according to claim 1 and 2 is characterized in that, described defrosting judge module further comprises:
Monitoring modular is according to the running time of described air-conditioner and the transient temperature value (T of described off-premises station (2)
E), send the signal that the integral body to the off-premises station (2) of described air-conditioner defrosts; And
Counting module when the number of times that in setting-up time the integral body of the off-premises station (2) of described air-conditioner is defrosted reaches set point number, sends the number of times signal of described whole defrosting.
4. an air-conditioner is characterized in that, has the defrost system of each described air-conditioner among the claim 1-3.
5. the Defrost method of an air-conditioner is characterized in that, may further comprise the steps:
Step 1, the defrosting judge module is in response to the number of times signal that the integral body of the off-premises station (2) of described air-conditioner is carried out the signal of whole defrosting and carried out described whole defrosting, the first defrosting instruction that output defrosts to the bottom of described air-conditioner outdoor unit (2), or the second defrosting instruction that the integral body of the off-premises station (2) of described air-conditioner is defrosted; If the output first defrosting instruction enters step 2; If the output second defrosting instruction enters step 3;
Step 2, in response to the described first defrosting instruction, the first defrosting control module is controlled described air-conditioner and is entered the first Defrost operation pattern that is defrosted in the bottom of described off-premises station (2); And under this pattern, in response to the transient temperature value (T of the off-premises station (2) of described air-conditioner
E) and set temperature value (T
0) comparative result, described defrosting judge module is exported the described first defrosting instruction or the second defrosting instruction once more; If the output first defrosting instruction then continues execution in step 2; If the output second defrosting instruction enters step 3;
Step 3, in response to the described second defrosting instruction, the second defrosting control module is controlled described air-conditioner and is entered the second Defrost operation pattern that the integral body to described off-premises station (2) defrosts.
6. the Defrost method of air-conditioner according to claim 5 is characterized in that,
The described second Defrost operation pattern changes the Defrost operation pattern of cooling operation mode over to from the heating operation mode for described air-conditioner;
The described first Defrost operation pattern is for described air-conditioner is in Defrost operation pattern under the heating operation mode;
Wherein, under the described first Defrost operation pattern, the aperture of electric expansion valve (3) reaches maximum.
7. according to the Defrost method of claim 5 or 6 described air-conditioners, it is characterized in that, further comprise:
According to the running time of described air-conditioner and the transient temperature value (T of described off-premises station (2)
E), monitoring modular sends the signal that the integral body to the off-premises station (2) of described air-conditioner defrosts; And
When the number of times that in setting-up time the integral body of the off-premises station (2) of described air-conditioner is defrosted reached set point number, counting module sent the number of times signal of described whole defrosting.
8. the Defrost method of air-conditioner according to claim 7 is characterized in that, described counting module is set at: when within two hours the integral body of described off-premises station (2) being carried out three whole defrostings, sends the described whole number of times signal that defrosts.
9. according to the Defrost method of each described air-conditioner in the claim 5,6 or 8, it is characterized in that, further comprise:
Transient temperature value (T when described off-premises station (2)
E) less than set temperature value (T
0) time, the described defrosting judge module output first defrosting instruction; Transient temperature value (T when described off-premises station (2)
E) more than or equal to set temperature value (T
0) time, the described defrosting judge module output second defrosting instruction.
10. the Defrost method of air-conditioner according to claim 5 is characterized in that, described set temperature value (T
0) set according to the size of described air-conditioner power and the installation site of defrosting sensor on off-premises station (2) of described air-conditioner.
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| CN111503826A (en) * | 2020-04-29 | 2020-08-07 | 广东美的制冷设备有限公司 | Defrosting control method of air conditioning system and air conditioning system |
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| CN111397097B (en) * | 2020-04-03 | 2022-12-27 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner and air conditioner |
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| CN113137709A (en) * | 2021-04-30 | 2021-07-20 | 青岛海尔空调电子有限公司 | Air conditioner and control method thereof |
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