CN107270420B

CN107270420B - Control method and device of air conditioner and air conditioner

Info

Publication number: CN107270420B
Application number: CN201710607943.4A
Authority: CN
Inventors: 蔡国健
Original assignee: Midea Group Co Ltd; Midea Group Wuhan Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; Midea Group Wuhan Refrigeration Equipment Co Ltd
Priority date: 2017-07-24
Filing date: 2017-07-24
Publication date: 2020-09-18
Anticipated expiration: 2037-07-24
Also published as: CN107270420A

Abstract

The invention provides a control method of an air conditioner, a control device of the air conditioner and the air conditioner, wherein the air conditioner comprises an outdoor heat exchanger which comprises a coil pipe, a heating element is arranged in the coil pipe, and the control method of the air conditioner comprises the following steps: detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, according to T_i+b‑T_iAnd T_i‑T_i‑bThe difference value of (a) controls the opening and closing of the heating element; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2. This scheme usable heating element preheats the coil before changing the frost, prevents to frost, and in the frost process, accelerates to change the frost speed to after the air conditioner changes the frost, continue heating coil, so that can be clean with the ice water that melts, reduce the possibility that ice water frosted once more.

Description

Control method and device of air conditioner and air conditioner

Technical Field

The invention relates to the field of household appliances, in particular to a control method of an air conditioner, a control device of the air conditioner and the air conditioner.

Background

At present, when the air conditioner is used in a heating mode, particularly in an environment with lower outdoor temperature in winter, the temperature of a coil pipe of the air conditioner is lower than that of the external environment, so that water vapor of the external environment can be condensed on an outdoor heat exchanger to frost, particularly when the humidity of outdoor air is relatively high, the frosting problem of the outdoor heat exchanger can be more serious, the frosting can reduce the air volume of the outdoor heat exchanger for heat exchange, the heat exchange effect of the outdoor heat exchanger is poor, and the heat exchange performance of the whole air conditioner is influenced. In order to ensure the heating effect, on one hand, frost formation needs to be reduced as much as possible, on the other hand, the outdoor heat exchanger needs to be defrosted, and the defrosting speed needs to be increased at the same time, so that ice water on a chassis of an outdoor unit of the air conditioner is drained completely.

Therefore, how to design a control method for an air conditioner and an air conditioner that can increase defrosting speed, shorten defrosting period, and improve heating effect of the air conditioner is a problem to be solved.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

The present invention is based on the above problems and provides a control method for an air conditioner.

It is still another object of the present invention to provide a control apparatus of an air conditioner.

It is still another object of the present invention to provide an air conditioner including the control device of the air conditioner.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for an air conditioner, where the air conditioner includes an outdoor heat exchanger, the outdoor heat exchanger includes a coil, and a heating element is disposed in the coil, where the control method for the air conditioner includes: detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, according to T_i+b-T_iAnd T_i-T_i-bThe difference value of (a) controls the opening and closing of the heating element; wherein the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, and i is an integer greater than or equal to 1And b is a natural number of 2 or more.

According to the control method of the air conditioner provided by the embodiment of the invention, a heating element can be arranged in the coil of the outdoor heat exchanger, so that the coil can be heated by the heating element, the temperature of the coil is detected according to the preset time interval a, and the temperature of the coil detected each time is recorded as T₁、T₂、T₃… … Tn, where n is an integer greater than or equal to 3, the temperature of the coil can be continuously obtained, and then the temperature change value of the coil, namely T, in the same time interval can be calculated according to the temperature of the coil_i+b-T_iAnd T_i-T_i-bAnd T is_i+b-T_iAnd T_i-T_i-bThe difference value of (a) can show that the temperature of the coil changes fast and slowly, the temperature of the coil is not frosted and is not changed in the air conditioner, in the frosting process, the temperature of the coil is lower and lower, the temperature drops faster and faster, after the defrosting is finished, the temperature of the coil is higher and higher, and the temperature rises faster and faster, so that the temperature of the coil changes fast and slowly through T_i+b-T_iAnd T_i-T_i-bThe difference value can accurately reflect the specific stage of the air conditioner, specifically, for example, the stage of frosting, or the stage of defrosting, or the defrosting is completed, therefore, the heating element can be turned on or turned off corresponding to the actual requirement in each stage, so that the heating coil can be heated by using the heating element, the defrosting times are reduced, the defrosting period is shortened, the heating effect is improved, the stable operation of the air conditioner is ensured, and the use experience of a user is improved. Wherein, specifically this kind of setting, on the one hand can be when outdoor heat exchanger begins to frost, open heating element, with heating coil, in order to slow down the speed of frosting, this kind of setting of on the other hand can also be in the frost in-process, open heating element heating coil, so that can be in the refrigerant cycle process of defrosting, heat the refrigerant, so that the refrigerant can give off more heats after the operation is got up, in order to carry out the large tracts of land defrosting, this kind of setting can combine together heating element and the normal defrosting function of air conditioner promptly, so that can improve the efficiency of defrosting, shorten the time of defrosting, thereby make the frost on the outdoor heat exchanger can be melted fast and fall. Of course, after normal defrosting of the air conditioner is completed, the heating element can be turned on again, so that the melted ice water can be drained by the heating element, and the possibility of frost formation of the ice water is reduced.

In addition, the control method of the air conditioner provided according to the above embodiment of the present invention has the following additional technical features:

in the above technical solution, preferably, the term T is_i+b-T_iAnd T_i-T_i-bThe step of controlling the opening and closing of the heating element specifically comprises: judgment of T_i+b-T_iWhether or not less than T_i-T_i-b，And then T is judged_i+b-T_i＜T_i-T_i-bWhen the heating element is turned on, the heating element heats the coil.

In the technical schemes, the temperature of the coil pipe is kept unchanged when frost does not form, and only when frost begins to be received, the temperature of the coil pipe gradually begins to drop, and the more frost forms, the faster and faster the temperature of the coil pipe drops, so that when T is judged to be formed_i+b-T_i＜T_i-T_i-bIn addition, because the condensation speed of the frost is slowed down, the times of frosting of the outdoor heat exchanger can be reduced within the same period of time, the times of frosting of the outdoor heat exchanger are reduced, the heating effect is improved, the stable operation of the air conditioner system is ensured, and the use experience of a user is improved.

Wherein, preferably, the parameter of b can be reasonably selected so that the temperature of the coil pipe satisfies T_i+b-T_i＜T_i-T_i-bAt that time, the air conditioner begins to frost or just frosts.

In the above technical solution, preferably, the control of the air conditionerThe method further comprises the following steps: said according to T_i+b-T_iAnd T_i-T_i-bThe step of controlling the opening and closing of the heating element specifically comprises: judgment of T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bIs greater than or equal to the first preset duration, the heating element is turned on so that the heating element heats the coil.

In this embodiment, at T_i+b-T_i＜T_i-T_i-bThe duration time of the heating element is greater than or equal to a first preset time period, for example, 2a or 2 minutes to 10 minutes, that is, it is described that the temperature of the coil pipe decreases more and more within two preset time intervals, so that it can be described that frost is more and more condensed, and at this time, the air conditioner generally needs to start a defrosting program to defrost, therefore, at this time, the heating element is started to start the heating element in the process of starting defrosting of the air conditioner, so as to heat condensed frost outside the outdoor heat exchanger or heat the refrigerant by using the coil pipe, so as to heat the refrigerant in the refrigerant defrosting cycle process, so that the refrigerant can emit more heat after running, so as to defrost a large area, that is, the arrangement can combine the heating element with the normal defrosting function of the air conditioner, so as to improve defrosting efficiency and shorten defrosting time, therefore, the frost on the outdoor heat exchanger can be quickly melted, and the heat exchange efficiency of the outdoor heat exchanger can be ensured, so that the heating effect of the air conditioner is ensured.

Wherein, preferably, the parameter of b can be reasonably selected so that the temperature of the coil pipe satisfies T_i+b-T_i＜T_i-T_i-bWhen the duration time is longer than or equal to the first preset time length, the air conditioner begins to frost or just frosts.

In any one of the above technical solutions, preferably, the method for controlling an air conditioner further includes: and detecting the temperature of the coil, judging whether the temperature of the coil is less than or equal to the defrosting starting temperature of the air conditioner, and starting the heating element when the temperature of the coil is less than or equal to the defrosting starting temperature of the air conditioner so that the heating element heats the coil.

In the technical schemes, when the temperature of the coil pipe is judged to be less than or equal to the defrosting starting temperature of the air conditioner, that is, the air conditioner is switched to the defrosting mode, at this time, the heating element is turned on, and the heating element can be turned on to heat the coil pipe in the process of starting defrosting of the air conditioner, so that the condensed frost outside the outdoor heat exchanger can be heated or the refrigerant can be heated by the coil pipe so as to ensure that in the refrigerant defrosting cycle process, the refrigerant is heated so that the refrigerant can emit more heat after running to defrost in a large area, namely, the arrangement can combine the heating element with the normal defrosting function of the air conditioner so as to improve the defrosting efficiency and shorten the defrosting time, thereby the frost on the outdoor heat exchanger can be melted rapidly, and then the heat exchange efficiency of the outdoor heat exchanger can be ensured, so that the heating effect of the air conditioner is ensured.

In any of the above technical solutions, preferably, said is according to T_i+b-T_iAnd T_i-T_i-bThe step of controlling the opening and closing of the heating element specifically comprises: judgment of T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bIs greater than or equal to a second predetermined time duration, the heating element is turned on so that the heating element heats the coil.

In the technical schemes, after the air conditioner starts the defrosting mode, frost on the outdoor heat exchanger is less and less, so that the temperature of the coil pipe is higher and higher, and T is judged_i+b-T_i＞T_i-T_i-bThe duration time is greater than or equal to the second preset time, that is, the temperature of the coil continuously rises faster and faster within a period of time, so that the frost on the outdoor heat exchanger can be shown to be almost melted, and therefore, the air conditioner exits the defrosting mode at the moment, and the heating element is turned on at the momentAfter normal defrosting of the air conditioner is finished, the heating element can be started, so that melted ice water can be drained by the heating element, and the possibility of frost formation of the ice water is reduced.

In any one of the above technical solutions, preferably, the method for controlling an air conditioner further includes: and detecting the temperature of the coil, and starting the heating element when judging that the temperature of the coil is more than or equal to the temperature of the air conditioner for quitting defrosting so that the heating element heats the coil.

In the technical schemes, when the temperature of the coil is judged to be more than or equal to the temperature of the air conditioner for quitting defrosting, namely the air conditioner is proved to have quitted the defrosting mode, the heating element is turned on at the moment, and the heating element can be turned on after the air conditioner finishes normal defrosting, so that melted ice water can be drained by the heating element, and the possibility of the ice water frosting again is reduced.

In any of the above technical solutions, preferably, the control method of the air conditioner further includes: and after the heating element is started to heat the coil for a third preset time, the heating element is closed.

In these technical solutions, the heating element can be turned off after the heating element heating coil is turned on at any stage for a period of time, so that the heating element can automatically stop heating, wherein preferably, the heating duration of the heating element can be reasonably set according to the heating time when the heating element is turned on, specifically, for example, T is determined at the early stage of frosting of the air conditioner_i+b-T_i＜T_i-T_i-bWhen the heating element is started later, the third preset time period can be set to be within the range of more than or equal to 20min and less than or equal to 30min, or further preferably set to be 25min, because the time interval from the frosting start to the defrosting start of the air conditioner is about 30min, therefore, the setting can lead the heating element to stop heating for a period of time before the defrosting mode of the air conditioner is started, so as to avoid the heating element from being in a heating state for a long time, further prevent the heating element from being damaged due to long-time work, and meanwhile, the setting can also reasonably set the heating time of the heating elementSo as to reduce the energy consumption of the air conditioner. And in the defrosting process of the air conditioner, T is judged_i+b-T_i＜T_i-T_i-bAfter the duration time of the heating element is greater than or equal to the first preset time period, when the heating element is turned on, the third preset time period may be set to be within a range of greater than or equal to 9min and less than or equal to 15min, or further preferably, the third preset time period is set to be 12min, because the defrosting time of the air conditioner is generally about 15min, therefore, the setting enables the heating element to stop heating for a period of time before the air conditioner exits the defrosting mode, so that when the heating coil needs to be continued after the air conditioner exits the defrosting mode, the heating element can be heated at intervals in each interval needing heating, and further the heating element can be prevented from being in the working state for a long time, and thus the heating element can be prevented from being damaged due to long-time working. Wherein, after the air conditioner exits the defrosting mode, T is judged_i+b-T_i＞T_i-T_i-bAfter the duration time of the heating coil is longer than or equal to the second preset time, when the heating coil is continuously heated, the third preset time can be set within a range of being longer than 0min and less than or equal to 5min, or further preferably, the third preset time is set to 3 min.

Preferably, the first preset time period is less than or equal to the second preset time period.

In the above technical solution, preferably, the control method of the air conditioner further includes: judgment of T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a fourth preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to a fourth preset duration time, closing the heating element; and the fourth preset time length is equal to the sum of the second preset time length and the fifth preset time length.

In the technical scheme, T can be judged_i+b-T_i＜T_i-T_i-bThen the heating element is turned on to make the heating elementThe heating coil is arranged, and the heating element is ensured to be always turned on in the process of frosting and defrosting, and the air conditioner judges T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to the second preset time, the air conditioner exits the defrosting mode, and then the heating element heating coil is continuously controlled for a fifth preset time, preferably 3 minutes, so that the ice water can be drained out, and the ice water is prevented from being condensed again. This kind of scheme can be frosted to changing the frost, again to the whole in-process that changes the frost and end, opens heating element always to make heating element can be frosted to changing the frost, again to the whole in-process that changes the frost and end, homoenergetic heating coil, and this kind of setting can accelerate change the frost speed, shortens to change the frost cycle, reduces the air conditioner to heating element's control work load, and then can improve the effect of heating.

In another aspect, a method for controlling an air conditioner further includes: and detecting the temperature of the coil pipe, judging whether the duration time of the temperature of the coil pipe is more than or equal to the temperature of the air conditioner for quitting defrosting is more than or equal to a fifth preset time period, and closing the heating element when the duration time of the temperature of the coil pipe is more than or equal to the temperature of the air conditioner for quitting defrosting is more than or equal to the fifth preset time period.

In the technical scheme, T can be judged_i+b-T_i＜T_i-T_i-bWhen the temperature of the coil is higher than the temperature of the air conditioner, the heating element can be continuously heated for a fifth preset time, preferably 3 minutes, and then the heating element is closed, so that ice water can be drained out, and the ice water is prevented from being condensed again. This kind of scheme can be frosted to changing the frost, and the whole in-process that the frost ended again to changing the frost opens heating element always to make heating element can be frosted to changing the frost, again to the whole in-process that the frost ended, homoenergetic heating coil, this kind of setting can accelerate the speed of changing the frost, shortens the period of changing the frost, reduces the air conditioner to heating element's control work load, and then the control work load of air conditioner to heating element, and thenThe heating effect can be improved.

In any of the above technical solutions, preferably, the control method of the air conditioner further includes: before the temperature of the coil is detected once every a preset time interval a, detecting the starting times N of the defrosting program started by the air conditioner after the air conditioner is started at the time, and assigning the preset time interval a to be a-0.5N when N is more than or equal to 1 and a-0.5N is more than or equal to e; wherein the initial value of N is 0, N is an integer greater than or equal to 0, and e is greater than or equal to 0 and less than or equal to a.

In the technical schemes, in a period from each time the air conditioner is started to be closed, the value of the starting times N of the defrosting program can be added with 1 every time the defrosting program is started, after the air conditioner finishes one-time defrosting, the value of the preset time interval a for detecting the temperature of the coil pipe is adjusted, namely, a is reassigned to a-0.5N, and the temperature of the coil pipe is detected according to the reassigned a. This kind of setting, at the same start-up in-process of air conditioner, if need carry out when changing frost many times, reduce in proper order through the predetermined time interval after will changing frost for the first time, can detect the condition of condensing of the frost on the outdoor heat exchanger more accurately to can be more timely change frost, in order to prevent that the frost from excessively condensing, simultaneously, this kind of change frost mode is compared in current change frost mode, and it is undulant little that indoor temperature is undulant during change frost, therefore can improve user experience. Specifically, for example, when a is equal to 2 minutes, N is equal to 0 during the first defrosting after the air conditioner is started up, so that the temperature of the coil can be detected every 2 minutes, and when the air conditioner is defrosted for the second time, N is equal to 1, so that the temperature of the coil can be detected every 1.5 minutes.

In any of the above technical solutions, preferably, the control method of the air conditioner further includes: when N is more than or equal to 1 and a-0.5N is less than e, keeping the preset time interval unchanged.

In the technical schemes, when a is continuously assigned, a is gradually reduced, and after a is reduced to a specific value, the value of a is not adjusted by the defrosting times, but the value of a is kept to be the value assigned for the last time, so that on one hand, a can be prevented from being assigned to be a negative number, and on the other hand, a can be prevented from being too small in subsequent values, and the time interval is too short. Specifically, for example, when a is equal to 2 minutes and e is equal to 1, N is equal to 0 when defrosting is performed for the first time after the air conditioner is started, so that the temperature of the coil can be detected and recorded every 2 minutes, and when defrosting is performed for the second time, N is equal to 1, so that the temperature of the coil can be detected and recorded every 1.5 minutes, and when N is equal to 4, a-0.5N is equal to 0 and 0 is less than e, so that a is not re-assigned to keep constant, and when N is equal to 3, a is assigned to 0.5(a-0.5N is 0.5), so that when N is greater than or equal to 4, the temperature of the coil is detected and recorded every 0.5 minutes.

In any one of the above technical solutions, preferably, the method for controlling an air conditioner further includes: and when the air conditioner is turned off or is turned on and started, resetting the starting times N and resetting the preset time interval a.

In the technical schemes, when the air conditioner is turned off or turned on, the value of the preset time interval a can be reset to an initial value, and the starting times N of the defrosting program started by the air conditioner are reset to zero.

Preferably, the preset time interval a is greater than or equal to 3min and less than or equal to 5min, and further preferably, the preset time interval a is equal to 2 min.

In these technical solutions, the value of a may be selected according to actual situations, specifically, for a frequency converter, a is preferably equal to 2 minutes, and for a frequency setter, a is preferably greater than or equal to 3 and less than or equal to 5 minutes.

Preferably, the defrosting starting temperature of the air conditioner is greater than or equal to minus 15 ℃ and less than or equal to minus 10 ℃, or the defrosting starting temperature of the air conditioner is equal to minus 12 ℃.

In these some technical schemes, the temperature that the air conditioner began to defrost is difficult for the undersize, otherwise can lead to the air conditioner to defrost untimely, it is late to defrost promptly, thereby can lead to, it is obvious to frost on the outdoor heat exchanger, therefore can reduce outdoor heat exchanger's heat exchange efficiency, and the temperature that the air conditioner began to defrost is difficult too big, otherwise can lead to the air conditioner to defrost earlier, just start defrosting when can lead to still not needing to defrost promptly, and then can cause the defrosting frequent, therefore be unfavorable for user experience. Therefore, it is preferable that the temperature at which the air conditioner starts defrosting is equal to or higher than minus 15 ℃ and equal to or lower than minus 10 ℃, and further, it is preferable that the temperature at which the air conditioner starts defrosting takes minus 12 ℃.

In any of the above technical solutions, preferably, the temperature at which the air conditioner exits defrosting is greater than or equal to 10 ℃ and less than or equal to 20 ℃, or the temperature at which the air conditioner exits defrosting is equal to 15 ℃.

In these some technical schemes, the air conditioner withdraws from the temperature of changing the frost, for the temperature that the air conditioner finishes changing the frost promptly, consequently, the temperature that the air conditioner withdraws from changing the frost is difficult too big, otherwise can lead to the frost on the outdoor heat exchanger all to remove, the air conditioner still is in the state of changing the frost all the time, therefore can prolong the time of changing the frost, be unfavorable for user experience, but the temperature that the air conditioner withdraws from changing the frost is also difficult for the undersize, otherwise can not remove when the frost, the air conditioner just withdraws from the program of changing the frost, thereby can lead to changing the frost incompletely, and then lead to outdoor heat exchanger's heat exchange efficiency to hang down. Therefore, the temperature of the air conditioner for removing the defrosting is preferably equal to or higher than 10 ℃ and equal to or lower than 20 ℃, and further, the temperature of the air conditioner for removing the defrosting is preferably equal to or higher than 15 ℃.

In any of the above technical solutions, preferably, the fifth preset time period is greater than or equal to 0min and less than or equal to 5min, or the fifth preset time period is equal to 3 min.

In the technical schemes, after defrosting is finished, the time for opening the heating element is not longer, because after melted ice water is completely removed, the heating coil is meaningless, and meanwhile, after defrosting is finished, the time for opening the heating element is not shorter, otherwise, melted ice water cannot be completely removed, and ice water is frosted again. Therefore, the fifth preset time period is greater than or equal to 0min and less than or equal to 5min, and further preferably, the fifth preset time period is equal to 3min, so that the ice water can be drained, and the heating element can be turned off in time after the ice water is drained, so that the energy consumption is saved.

Wherein, preferably, the first preset time length and/or the second preset time length is equal to 2 a.

In a second aspect of the present invention, a control device for an air conditioner is provided, where the air conditioner includes an outdoor heat exchanger, the outdoor heat exchanger includes a coil, and a heating element is disposed in the coil, where the control device for the air conditioner includes: the detection unit is used for detecting the temperature of the coil pipe; the control unit is used for controlling the detection unit to detect the temperature of the coil pipe once every preset time interval a and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, according to T_i+b-T_iAnd T_i-T_i-bThe difference value of (a) controls the opening and closing of the heating element; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2.

According to the control device of the air conditioner provided by the embodiment of the invention, a heating element can be arranged in the coil of the outdoor heat exchanger, so that the coil can be heated by the heating element, the temperature of the coil is detected according to the preset time interval a, and the temperature of the coil detected each time is recorded as T₁、T₂、T₃… … Tn, where n is an integer greater than or equal to 3, the temperature of the coil can be continuously obtained, and then the temperature change value of the coil, namely T, in the same time interval can be calculated according to the temperature of the coil_i+b-T_iAnd T_i-T_i-bAnd T is_i+b-T_iAnd T_i-T_i-bThe difference value of (a) can show that the temperature of the coil changes fast and slowly, the temperature of the coil is not frosted and is not changed in the air conditioner, in the frosting process, the temperature of the coil is lower and lower, the temperature drops faster and faster, after the defrosting is finished, the temperature of the coil is higher and higher, and the temperature rises faster and faster, so that the temperature of the coil changes fast and slowly through T_i+b-T_iAnd T_i-T_i-bThe difference value can accurately reflect the specific stage of the air conditioner, specifically, for example, the stage of frosting, or the stage of defrosting, or the defrosting is completed, therefore, the heating element can be turned on or turned off corresponding to the actual requirement in each stage, so that the heating coil can be heated by using the heating element, the defrosting times are reduced, the defrosting period is shortened, the heating effect is improved, the stable operation of the air conditioner is ensured, and the use experience of a user is improved. Wherein, specifically this kind of setting, on the one hand can be when outdoor heat exchanger begins to frost, open heating element, with heating coil, in order to slow down the speed of frosting, this kind of setting of on the other hand can also be in the frost in-process, open heating element heating coil, so that can be in the refrigerant cycle process of defrosting, heat the refrigerant, so that the refrigerant can give off more heats after the operation is got up, in order to carry out the large tracts of land defrosting, this kind of setting can combine together heating element and the normal defrosting function of air conditioner promptly, so that can improve the efficiency of defrosting, shorten the time of defrosting, thereby make the frost on the outdoor heat exchanger can be melted fast. Of course, after normal defrosting of the air conditioner is completed, the heating element can be turned on again, so that the melted ice water can be drained by the heating element, and the possibility of frost formation of the ice water is reduced.

In addition, the control device of the air conditioner provided according to the above embodiment of the present invention has the following additional technical features:

in the foregoing technical solution, preferably, the control unit is specifically configured to determine T_i+b-T_iWhether or not less than T_i-T_i-bAnd then T is judged_i+b-T_i＜T_i-T_i-bWhen the heating element is turned on, the heating element heats the coil.

In the technical schemes, the temperature of the coil pipe is kept unchanged when frost does not form, and only when frost begins to be received, the temperature of the coil pipe gradually begins to drop, and the more frost forms, the faster and faster the temperature of the coil pipe drops, so that when T is judged to be formed_i+b-T_i＜T_i-T_i-bWhen, i.e. the temperature of the coilThe frost is reduced more and more quickly, so that the frost can be judged to be condensed on the outdoor heat exchanger, and the temperature of the coil pipe is reduced just because of the frost formation, therefore, the heating element is started at the moment, the coil pipe can be heated by using the heating element, the frost condensation speed is reduced, the frost condensation time on the heat exchanger can be prolonged, the frost condensation amount is reduced, the heating effect is ensured, in addition, the frost condensation speed is reduced, therefore, the frost formation times of the outdoor heat exchanger can be reduced in the same period of time, the defrosting times are reduced, the heating effect is improved, the stable operation of the air conditioner system is ensured, and the use experience of users is improved.

In the foregoing technical solution, preferably, the control unit is specifically configured to determine T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bIs greater than or equal to the first preset duration, the heating element is turned on so that the heating element heats the coil.

In this embodiment, at T_i+b-T_i＜T_i-T_i-bThe duration time of the heating element is greater than or equal to a first preset time period, for example, 2a or 2 minutes to 10 minutes, that is, it is described that the temperature of the coil pipe decreases faster and faster in two preset time intervals, so that it can be described that frost is more and more condensed, and at this time, the air conditioner generally needs to start a defrosting program to defrost, so that, at this time, the heating element is started to start the heating element in the process of starting defrosting of the air conditioner to heat the condensed frost outside the outdoor heat exchanger or heat the refrigerant by using the coil pipe so as to heat the refrigerant in the refrigerant defrosting cycle process, so that the refrigerant can emit more heat after running, so as to defrost a large area, that is, the setting is that the temperature of the coil pipe is more and faster, so that the frost is more condensed, and the air conditioner generally needs to start defrostingCan combine together heating element and the normal frost function of changing of air conditioner to can improve the efficiency of changing frost, shorten the time of changing frost, thereby make the frost on the outdoor heat exchanger can be melted fast, and then can ensure the heat exchange efficiency of outdoor heat exchanger promptly, in order to ensure the effect of heating of air conditioner.

In any of the above technical solutions, preferably, the control unit is further configured to control the detection unit to detect the temperature of the coil, determine whether the temperature of the coil is less than or equal to a temperature at which the air conditioner starts defrosting, and turn on the heating element when the temperature of the coil is determined to be less than or equal to the temperature at which the air conditioner starts defrosting, so that the heating element heats the coil.

In any of the above technical solutions, preferably, the control unit is specifically configured to determine T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bIs greater than or equal to a second predetermined time duration, the heating element is turned on so that the heating element heats the coil.

In the technical schemes, after the air conditioner starts the defrosting mode, frost on the outdoor heat exchanger is less and less, so that the temperature of the coil pipe is higher and higher, and T is judged_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to the second preset time, it can be shown that the temperature of the coil pipe is continuously increased more and more quickly in a period of time, so that it can be shown that the frost on the outdoor heat exchanger is almost melted, at this time, the air conditioner can exit the defrosting mode, and at this time, the heating element is turned on, and after the air conditioner is normally defrosted, the heating element can be turned on, so that the melted ice water can be drained by the heating element, and the possibility of the ice water frosting again can be reduced.

In any of the above technical solutions, preferably, the control unit is further configured to control the detection unit to detect the temperature of the coil, and when it is determined that the temperature of the coil is greater than or equal to the temperature at which the air conditioner exits defrosting, turn on the heating element, so that the heating element heats the coil.

In any of the above technical solutions, preferably, the control unit is further configured to turn off the heating element after turning on the heating element to heat the coil for a third preset time period.

In the technical schemes, the heating element can be turned off after the heating element heating coil is turned on at any stage for a period of time, so that the heating element can automatically stop heating, wherein preferably, the heating time can be reasonably set according to the turning-on heating time of the heating elementThe duration of heating of the element, in particular, for example, at the beginning of frost formation of the air conditioner, i.e. T is determined_i+b-T_i＜T_i-T_i-bWhen the heating element is started later, the third preset time period can be set to be within a range of more than or equal to 20min and less than or equal to 30min, or further preferably set to be 25min, because the time interval from the frosting start to the defrosting start of the air conditioner is about 30min, therefore, the setting can enable the heating element to stop heating for a period of time before the defrosting mode of the air conditioner is started, so as to avoid the heating element from being in a heating state for a long time, further prevent the heating element from being damaged due to long-time operation, and meanwhile, the setting can also reasonably set the heating time of the heating element, so as to reduce the energy consumption of the air conditioner. And in the defrosting process of the air conditioner, T is judged_i+b-T_i＜T_i-T_i-bAfter the duration time of the heating element is greater than or equal to the first preset time period, when the heating element is turned on, the third preset time period may be set to be within a range of greater than or equal to 9min and less than or equal to 15min, or further preferably, the third preset time period is set to be 12min, because the defrosting time of the air conditioner is generally about 15min, therefore, the setting enables the heating element to stop heating for a period of time before the air conditioner exits the defrosting mode, so that when the heating coil needs to be continued after the air conditioner exits the defrosting mode, the heating element can be heated at intervals in each interval needing heating, and further the heating element can be prevented from being in the working state for a long time, and thus the heating element can be prevented from being damaged due to long-time working. Wherein, after the air conditioner exits the defrosting mode, T is judged_i+b-T_i＞T_i-T_i-bAfter the duration time of the heating coil is longer than or equal to the second preset time, when the heating coil is continuously heated, the third preset time can be set within a range of being longer than 0min and less than or equal to 5min, or further preferably, the third preset time is set to 3 min.

In the foregoing technical solution, preferably, the control unit is further configured to determine T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a fourth preset time length or not, and judging T_i+b-Ti＞T_i-T_i-bWhen the duration time is longer than or equal to a fourth preset duration time, closing the heating element; and the fourth preset time length is equal to the sum of the second preset time length and the fifth preset time length.

In the technical scheme, T can be judged_i+b-T_iGreater than or equal to T_i-T_i-bThe duration time is more than or equal to a second preset time length, the heating element is started so as to heat the coil pipe of the heating element, the heating element is ensured to be always started in the process of frosting and defrosting, and the air conditioner judges T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to the second preset time, the air conditioner exits the defrosting mode, and then the heating element heating coil is continuously controlled for a fifth preset time, preferably 3 minutes, so that the ice water can be drained out, and the ice water is prevented from being condensed again. This kind of scheme can be frosted to changing the frost, again to the whole in-process that changes the frost and end, opens heating element always to make heating element can be frosted to changing the frost, again to the whole in-process that changes the frost and end, homoenergetic heating coil, and this kind of setting can accelerate change the frost speed, shortens to change the frost cycle, reduces the air conditioner to heating element's control work load, and then can improve the effect of heating.

In another aspect, a control apparatus for an air conditioner further includes: the control unit is further used for detecting the temperature of the coil pipe and closing the heating element when the duration time of the temperature of the coil pipe is judged to be greater than or equal to the temperature of the air conditioner for quitting defrosting is greater than or equal to a fifth preset time length.

In the technical scheme, T can be judged_i+b-T_i＜T_i-T_i-bWhen the defrosting device is started, the heating element is started to heat the coil, and the heating element is ensured to be always started in the defrosting processAnd continuing to heat the coil for a fifth preset time, preferably 3 minutes, after the temperature of the coil is greater than the temperature of the air conditioner exiting the defrosting mode, and then turning off the heating element, so that the ice water can be drained out and prevented from being condensed again. This kind of scheme can be frosting to changing the frost, again to the whole in-process that changes the frost and end, opens heating element always to make heating element can be frosting to changing the frost, again to the whole in-process that changes the frost and end, the homoenergetic heating coil, and this kind of setting can accelerate change the frost speed, shortens to change the frost cycle, reduces the air conditioner to heating element's control work load, and then can improve the effect of heating.

In any of the above technical solutions, preferably, the control unit is further configured to detect a starting frequency N of the air conditioner starting a defrosting program after the air conditioner is started at this time before the temperature of the coil pipe is detected once every a preset time interval a, and assign a preset time interval a to 0.5N when N is greater than or equal to 1 and a-0.5N is greater than or equal to e; wherein the initial value of N is 0, N is an integer greater than or equal to 0, and e is greater than or equal to 0 and less than or equal to a.

In any of the above technical solutions, preferably, the control unit is further configured to keep the preset time interval unchanged when N is greater than or equal to 1 and a-0.5N is less than e.

In any of the above technical solutions, preferably, the control unit is further configured to clear the start-up time N and reset the preset time interval a when the air conditioner is turned off or when the air conditioner is turned on and started.

An embodiment of a third aspect of the present invention provides an air conditioner comprising: an outdoor heat exchanger comprising a coil; a heating assembly mounted within the coil, the heating assembly including a mounting housing and a heating element disposed within the mounting housing; and a control device of an air conditioner provided in any embodiment of the second aspect.

The air conditioner provided by the embodiment of the third aspect of the present invention includes an outdoor heat exchanger, a heating assembly installed in a coil of the outdoor heat exchanger, and the control device of the air conditioner provided by any one of the embodiments of the second aspect, and therefore, the beneficial effects of the control device of the air conditioner provided by any one of the embodiments of the second aspect are achieved, and are not repeated herein.

In the above technical solution, preferably, the mounting housing is a mounting pipe, and the mounting pipe is mounted in the coil pipe.

In these technical schemes, can be preferred to set up the installation casing into the installation pipe to installation pipe and coil pipe can constitute the sleeve pipe, so that the installation of installation casing, simultaneously, this kind of setting also can be installed the heating pipe commonly used in the installation intraductal, in order to use as heating element. Meanwhile, the heating assembly is common, so that the heating assembly is easy to purchase, and the cost of the product can be reduced.

In the above technical solution, preferably, the mounting shell is a U-shaped mounting tube, the coil is a serpentine tube formed by connecting a plurality of U-shaped tubes, and the U-shaped mounting tube is mounted in one of the U-shaped tubes.

Among these technical scheme, can be preferred set the coil pipe into the serpentine pipe that a plurality of U-shaped pipe interconnect become, because this kind of coil pipe is more common, and often is used for outdoor heat exchanger, therefore easily purchase to can reduction in production cost, at this moment, can preferably set the installation casing into the U-shaped installation pipe, so that the coil pipe can the mutual adaptation with the shape of installation casing, thereby can make the structure of product more reasonable compact. Meanwhile, the mounting pipe is a U-shaped mounting pipe, so that the heat dissipation area is increased, and the heating efficiency of the heating assembly is increased.

Wherein, preferably, the mounting pipe is installed in a U-shaped pipe at the lowermost end of the coil pipe, i.e., in a U-shaped pipe closest to a chassis of an outdoor unit of an air conditioner.

In the above technical solution, preferably, the air conditioner further includes: at least one support member disposed within the coil for supporting the heating assembly within the coil.

In these technical solutions, the air conditioner further includes a support member, specifically, the heating assembly can be supported and installed in the coil pipe by using the support member, and this arrangement can realize the positioning and installation of the heating assembly in the coil pipe by using the support member, specifically, the heating assembly can be axially and radially positioned and installed in the coil pipe. Wherein preferably, the mounting tube is mounted in the middle of a section of the serpentine tube.

Wherein, preferably, the support is a support ring, and the number of the support is a plurality.

Preferably, the air conditioner is an integrated air conditioner, such as a window air conditioner, in which case, the indoor unit and the outdoor unit are integrated, or the air conditioner is a split air conditioner.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart illustrating a control method of an air conditioner according to a first embodiment of the present invention;

fig. 2 is a flowchart illustrating a control method of an air conditioner according to a second embodiment of the present invention;

fig. 3 is a flowchart illustrating a control method of an air conditioner according to a third embodiment of the present invention;

fig. 4 is a flowchart illustrating a control method of an air conditioner according to a fourth embodiment of the present invention;

fig. 5 is a flowchart illustrating a control method of an air conditioner according to a fifth embodiment of the present invention;

fig. 6 is a flowchart illustrating a control method of an air conditioner according to a sixth embodiment of the present invention;

fig. 7 is a block diagram schematically illustrating a structure of a control apparatus of an air conditioner according to an embodiment of the present invention;

fig. 8 is a block diagram schematically illustrating a structure of an air conditioner provided according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a part of an air conditioner provided according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

A control method of an air conditioner provided according to a first embodiment of the present invention is described below with reference to fig. 1.

Specifically, as shown in fig. 1, an embodiment of a first aspect of the present invention provides a control method for an air conditioner, where the air conditioner includes an outdoor heat exchanger, the outdoor heat exchanger includes a coil, and a heating element is disposed in the coil, where the control method for the air conditioner includes: 102, detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, according to T_i+b-T_iAnd T_i-T_i-bThe difference value of the control heating element is used for controlling the opening and the closing of the heating element; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2.

According to the control method of the air conditioner provided by the embodiment of the invention, a heating element can be arranged in the coil of the outdoor heat exchanger, so that the coil can be heated by the heating element, the temperature of the coil is detected according to the preset time interval a, and the temperature of the coil detected each time is recorded as T₁、T₂、T₃… … Tn, where n is an integer greater than or equal to 3, the temperature of the coil can be continuously obtained, and then the temperature change value of the coil, namely T, in the same time interval can be calculated according to the temperature of the coil_i+b-T_iAnd T_i-T_i-bAnd T is_i+b-T_iAnd T_i-T_i-bThe difference value of (a) can show that the temperature of the coil changes fast and slowly, the temperature of the coil is not frosted and is not changed in the air conditioner, in the frosting process, the temperature of the coil is lower and lower, the temperature drops faster and faster, after the defrosting is finished, the temperature of the coil is higher and higher, and the temperature rises faster and faster, so that the temperature of the coil changes fast and slowly through T_i+b-T_iAnd T_i-T_i-bThe difference value can accurately reflect the specific stage of the air conditioner, such as frosting stage or defrosting stageThe stage, or the defrosting is accomplished, consequently, just can open or close heating element at each stage corresponding actual need to can utilize heating element to come heating coil, in order to reduce the number of times of defrosting, shorten the cycle of defrosting, improve the heating effect, guarantee the steady operation of air conditioner, and then improve user's use and experience. Wherein, specifically this kind of setting, on the one hand can be when outdoor heat exchanger begins to frost, open heating element, with heating coil, in order to slow down the speed of frosting, this kind of setting of on the other hand can also be in the frost in-process, open heating element heating coil, so that can be in the refrigerant cycle process of defrosting, heat the refrigerant, so that the refrigerant can give off more heats after the operation is got up, in order to carry out the large tracts of land defrosting, this kind of setting can combine together heating element and the normal defrosting function of air conditioner promptly, so that can improve the efficiency of defrosting, shorten the time of defrosting, thereby make the frost on the outdoor heat exchanger can be melted fast. Of course, after normal defrosting of the air conditioner is completed, the heating element can be turned on again, so that the melted ice water can be drained by the heating element, and the possibility of frost formation of the ice water is reduced.

A control method of an air conditioner according to a second embodiment of the present invention will be described with reference to fig. 2.

Specifically, as shown in fig. 2, the control method of the air conditioner includes the steps of:

step 202, detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, judging T_i+b-T_iWhether or not less than T_i-Ti-b and at the judgment of T_i+b-T_i＜T_i-T_i-bWhen the heating element is started, the heating element is enabled to heat the coil; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2.

In this step, the temperature of the coil remains unchanged when there is no frost formation, but only at the beginning of frost contact, the temperature gradually starts to decrease, and the frost formation increases, the temperature of the coil decreasesThe degree will decrease faster and faster, so when T is judged_i+b-T_i＜T_i-T_i-bIn addition, because the condensation speed of the frost is slowed down, the times of frosting of the outdoor heat exchanger can be reduced within the same period of time, the times of frosting of the outdoor heat exchanger are reduced, the heating effect is improved, the stable operation of the air conditioner system is ensured, and the use experience of a user is improved.

And step 204, after the heating element is started to heat the coil for 20-30 min, closing the heating element.

In this step, specifically, at the beginning of the frost formation of the air conditioner, T is judged_i+b-T_i＜T_i-T_i-bWhen the heating element is started later, the heating time of the heating element can be set to be within the range of more than or equal to 20min and less than or equal to 30min, or further preferably, the heating time of the heating element is set to be 25min, because the time interval from the beginning of frosting to the beginning of defrosting of the air conditioner is about 30min, therefore, the setting can enable the heating element to stop heating for a period of time before the defrosting mode of the air conditioner is started, so as to avoid the heating element from being in a heating state for a long time, further prevent the heating element from being damaged due to long-time operation, and meanwhile, the setting can also reasonably set the heating time of the heating element, so as to reduce the energy consumption of the air conditioner.

A control method of an air conditioner provided according to a third embodiment of the present invention is described below with reference to fig. 3.

Specifically, as shown in fig. 3, the control method of the air conditioner includes the steps of:

step 302, detecting the temperature of the coil pipe once every preset time interval a, and detecting the temperature of the coil pipe detected for the ith timeIs recorded as T_iAnd when i is greater than b, judging T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bWhen the duration time is longer than or equal to the first preset duration time, the heating element is started so that the heating element heats the coil; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2. In this step, at T_i+b-T_i＜T_i-T_i-bThe duration time of the heating element is greater than or equal to a first preset time period, for example, 2a or 2 minutes to 10 minutes, that is, it is described that the temperature of the coil pipe decreases more and more within two preset time intervals, so that it can be described that frost is more and more condensed, and at this time, the air conditioner generally needs to start a defrosting program to defrost, therefore, at this time, the heating element is started to start the heating element in the process of starting defrosting of the air conditioner, so as to heat condensed frost outside the outdoor heat exchanger or heat the refrigerant by using the coil pipe, so as to heat the refrigerant in the refrigerant defrosting cycle process, so that the refrigerant can emit more heat after running, so as to defrost a large area, that is, the arrangement can combine the heating element with the normal defrosting function of the air conditioner, so as to improve defrosting efficiency and shorten defrosting time, therefore, the frost on the outdoor heat exchanger can be quickly melted, and the heat exchange efficiency of the outdoor heat exchanger can be ensured, so that the heating effect of the air conditioner is ensured.

And step 304, after the heating element heating coil is started for 9-15 min, the heating element is closed.

In this step, specifically, after the heating element heating coil is turned on for 9min to 15min, the heating element may be turned off to stop heating, because the defrosting time of the air conditioner is generally about 15min, therefore, this arrangement can stop heating the heating element for a period of time before the air conditioner exits the defrosting mode, so that when the heating coil needs to be continued after the air conditioner exits the defrosting mode, the heating element can be heated at intervals in each interval needing to be heated, and the heating element can be prevented from being in the working state for a long time, thereby preventing the heating element from being damaged due to long-time working.

In another embodiment, preferably, the control method of the air conditioner further includes: and detecting the temperature of the coil, judging whether the temperature of the coil is less than or equal to the defrosting starting temperature of the air conditioner, and starting the heating element when the temperature of the coil is less than or equal to the defrosting starting temperature of the air conditioner so that the heating element heats the coil.

In the embodiment, when the temperature of the coil is judged to be less than or equal to the defrosting starting temperature of the air conditioner, that is, the air conditioner is switched to the defrosting mode, at this time, the heating element is turned on, and the heating element can be turned on to heat the coil pipe in the process of starting defrosting of the air conditioner, so that the condensed frost outside the outdoor heat exchanger can be heated or the refrigerant can be heated by the coil pipe so as to ensure that in the refrigerant defrosting cycle process, the refrigerant is heated so that the refrigerant can emit more heat after running to defrost in a large area, namely, the arrangement can combine the heating element with the normal defrosting function of the air conditioner so as to improve the defrosting efficiency and shorten the defrosting time, thereby the frost on the outdoor heat exchanger can be melted rapidly, and then the heat exchange efficiency of the outdoor heat exchanger can be ensured, so that the heating effect of the air conditioner is ensured.

A control method of an air conditioner according to a fourth embodiment of the present invention will be described in detail with reference to fig. 4.

In a fourth embodiment, a method for controlling an air conditioner includes:

step 402, detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, judging T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bThe duration time is more than or equal to a second preset duration time, the heating element is started, so that the heating elementA heating coil of the element; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2. In this step, after the air conditioner starts the defrosting mode, the frost on the outdoor heat exchanger is less and less, and therefore, the temperature of the coil is higher and higher, and the T is judged_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to the second preset time, it can be shown that the temperature of the coil pipe is continuously increased more and more quickly in a period of time, so that it can be shown that the frost on the outdoor heat exchanger is almost melted, at this time, the air conditioner can exit the defrosting mode, and at this time, the heating element is turned on, and after the air conditioner is normally defrosted, the heating element can be turned on, so that the melted ice water can be drained by the heating element, and the possibility of the ice water frosting again can be reduced.

And step 404, after the heating element heating coil is started for 0min-5min, the heating element is closed. In this step, T is determined after the air conditioner exits the defrosting mode_i+b-T_i＞T_i-T_i-bAfter the duration time of the heating element is longer than or equal to the second preset time period, when the heating coil is continuously heated, the heating time period of the heating element can be set to be within a range of more than 0min and less than or equal to 5min, or further preferably, the heating time period of the heating element is set to be 3 min.

In any of the above embodiments, preferably, the control method of the air conditioner further includes: and detecting the temperature of the coil, and starting the heating element when judging that the temperature of the coil is more than or equal to the temperature of the air conditioner for quitting defrosting so that the heating element heats the coil.

In these embodiments, when the temperature of the coil is determined to be greater than or equal to the temperature at which the air conditioner exits defrosting, that is, the air conditioner exits the defrosting mode, and the heating element is turned on at this time, the heating element can be turned on after normal defrosting of the air conditioner is completed, so that melted ice water can be drained away by using the heating element, and the possibility of ice water frosting again is reduced.

A control method of an air conditioner according to a fifth embodiment of the present invention will be described in detail with reference to fig. 5.

In a fifth embodiment, a method for controlling an air conditioner includes:

step 502, detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, judging T_i+b-T_iWhether or not less than T_i-T_i-bAnd then T is judged_i+b-T_i＜T_i-T_i-bWhen the heating element is started, the heating element is enabled to heat the coil; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2.

Step 504, judge T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a fourth preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to the fourth preset duration time, the heating element is closed; and the fourth preset time length is equal to the sum of the second preset time length and the fifth preset time length. In this step, T may be judged_i+b-T_i＜T_i-T_i-bIf the duration time is longer than or equal to the fourth preset time, the heating element is started so as to heat the coil pipe of the heating element, the heating element is ensured to be always started in the process of frosting and defrosting, and the air conditioner judges that T is greater than or equal to the fourth preset time_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to the second preset time, the air conditioner exits the defrosting mode, and then the heating element heating coil is continuously controlled for a fifth preset time, preferably 3 minutes, so that the ice water can be drained out, and the ice water is prevented from being condensed again. This kind of scheme can be frosted to changing the frost, and to the whole in-process that changes the frost and end again, opens heating element always to make heating element can be frosted to changing the frost, again to the whole in-process that changes the frost and end, homoenergetic heating coil, this kind of setting can accelerate to change the frostThe speed shortens the defrosting cycle, reduces the control workload of the air conditioner on the heating element, and further can improve the heating effect.

In this embodiment, T may be determined_i+b-T_i＜T_i-T_i-bWhen the temperature of the coil is higher than the temperature of the air conditioner, the heating element can be continuously heated for a fifth preset time, preferably 3 minutes, and then the heating element is closed, so that ice water can be drained out, and the ice water is prevented from being condensed again. This kind of scheme can be frosting to changing the frost, again to the whole in-process that changes the frost and end, opens heating element always to make heating element can be frosting to changing the frost, again to the whole in-process that changes the frost and end, the homoenergetic heating coil, and this kind of setting can accelerate change the frost speed, shortens to change the frost cycle, reduces the air conditioner to heating element's control work load, and then can improve the effect of heating.

In step 504 of the fifth embodiment, the temperature of the coil is detected, whether the duration of the temperature of the coil being greater than or equal to the temperature at which the air conditioner exits defrosting is greater than or equal to a fifth preset time period is determined, and the heating element is turned off when the duration of the temperature of the coil being greater than or equal to the temperature at which the air conditioner exits defrosting is determined to be greater than or equal to the fifth preset time period.

In this embodiment, T may be determined_i+b-T_i＜T_i-T_i-bWhen the temperature of the coil is higher than the temperature of the air conditioner, the heating element can be continuously heated for a fifth preset time, preferably 3 minutes, and then the heating element is closed, so that ice water can be drained out, and the ice water is prevented from being condensed again. The proposal can ensure that in the whole process from frosting to defrosting and then to defrosting,the heating element is always opened, so that the heating element can be heated by the heating coil in the whole process from frosting to defrosting and then to defrosting, the defrosting speed can be increased by the arrangement, the defrosting period is shortened, the control workload of the air conditioner on the heating element is reduced, and the heating effect can be improved.

A control method of an air conditioner according to a sixth embodiment of the present invention will be described in detail with reference to fig. 6.

In a sixth embodiment, a method for controlling an air conditioner includes:

step 602, detecting the starting frequency N of the air conditioner starting defrosting program after the air conditioner is started at the starting, and assigning a preset time interval a to be a-0.5N when N is more than or equal to 1; wherein the initial value of N is 0, and N is an integer greater than or equal to 0. In the step, in a period from each time the air conditioner is started to be closed, the value of the starting times N of the defrosting program is added by 1 every time the defrosting program is started, and after the air conditioner finishes one time of defrosting, the value of the preset time interval a for detecting the temperature of the coil pipe is adjusted, namely, a is reassigned to a-0.5N, and the temperature of the coil pipe is detected according to the reassigned a.

Step 604, detecting the temperature of the coil pipe once every preset time interval a, recording the temperature of the coil pipe detected for the ith time as Ti, judging whether Ti + b-Ti is smaller than Ti-Ti-b when i is larger than b, and starting a heating element when Ti + b-Ti is smaller than Ti-Ti-b so that the heating element heats the coil pipe; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2.

And step 606, turning off the heating element after turning on the heating element to heat the coil for 20-30 min.

Step 608, determine T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bIs greater than or equal to a first predetermined duration, the heating element is turned on so that the heating element heats the coil.

And step 610, after the heating element heating coil is started for 9-15 min, the heating element is closed.

Step 612, determine T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bIs greater than or equal to a second predetermined time duration, the heating element is turned on so that the heating element heats the coil.

And 614, turning off the heating element after turning on the heating element to heat the coil for 0-5 min.

In this embodiment, in the same start-up process of air conditioner, if need carry out the time spent defrosting many times, reduce in proper order through the preset time interval after will defrosting for the first time, can detect the condition of condensing of the frost on the outdoor heat exchanger more accurately to can be more timely change the frost, with prevent that the frost from excessively condensing, simultaneously, this kind of mode of changing the frost compares in current mode of changing the frost, and it is little that its indoor temperature fluctuates during the time spent changing the frost, therefore can improve user experience. Specifically, for example, when a is equal to 2 minutes, N is equal to 0 during the first defrosting after the air conditioner is started up, so that the temperature of the coil can be detected every 2 minutes, and when the air conditioner is defrosted for the second time, N is equal to 1, so that the temperature of the coil can be detected every 1.5 minutes.

In the above embodiment, preferably, the control method of the air conditioner further includes: when N is more than or equal to 1 and a-0.5N is less than e, keeping the preset time interval unchanged.

In the embodiment, when a is continuously assigned, a is gradually reduced, and after a is reduced to a specific value, the value of a is not adjusted by the defrosting times, but is kept as the value assigned last time, so that on one hand, a can be prevented from being assigned to be a negative number, and on the other hand, a can be prevented from being excessively reduced in subsequent values, and the time interval is too short. Specifically, for example, when a is equal to 2 minutes and e is equal to 1, N is equal to 0 when defrosting is performed for the first time after the air conditioner is started, so that the temperature of the coil can be detected and recorded every 2 minutes, and when defrosting is performed for the second time, N is equal to 1, so that the temperature of the coil can be detected and recorded every 1.5 minutes, and when N is equal to 4, a-0.5N is equal to 0 and 0 is less than e, so that a is not re-assigned to keep constant, and when N is equal to 3, a is assigned to 0.5(a-0.5N is 0.5), so that when N is greater than or equal to 4, the temperature of the coil is detected and recorded every 0.5 minutes.

In the above embodiment, preferably, the control method of the air conditioner further includes: when the air conditioner is turned off or turned on, the starting times N are reset, and the preset time interval a is reset.

In this embodiment, when the air conditioner is turned off or on, the value of the preset time interval a may be reset to an initial value, and the number of times N of starting the defrosting program of the air conditioner may be reset to zero.

Wherein, the preset time interval a is preferably greater than or equal to 3min and less than or equal to 5min, and further preferably, the preset time interval a is equal to 2 min.

In these embodiments, the value of a may be selected according to practical situations, specifically, for a frequency converter, a is preferably equal to 2 minutes, and for a fixed frequency converter, a is preferably equal to or greater than 3 and equal to or less than 5 minutes.

Wherein, preferably, the defrosting starting temperature of the air conditioner is more than or equal to minus 15 ℃ and less than or equal to minus 10 ℃, or the defrosting starting temperature of the air conditioner is equal to minus 12 ℃.

In these embodiments, the temperature that the air conditioner began to defrost is difficult for the undersize, otherwise can lead to the air conditioner to defrost untimely, it is late to defrost promptly, thereby can lead to, it is obvious to frost on the outdoor heat exchanger, therefore can reduce outdoor heat exchanger's heat exchange efficiency, and the temperature that the air conditioner began to defrost is difficult too big, otherwise can lead to the air conditioner to defrost earlier, just begin to defrost when can lead to still not needing to defrost promptly, and then can arouse to defrost frequently, therefore be unfavorable for user experience. Therefore, it is preferable that the temperature at which the air conditioner starts defrosting is equal to or higher than minus 15 ℃ and equal to or lower than minus 10 ℃, and further, it is preferable that the temperature at which the air conditioner starts defrosting takes minus 12 ℃.

In any of the above embodiments, preferably, the temperature at which the air conditioner exits defrosting is equal to or higher than 10 ℃ and equal to or lower than 20 ℃, or the temperature at which the air conditioner exits defrosting is equal to or higher than 15 ℃.

In these embodiments, the air conditioner withdraws from the temperature of changing the frost, namely the temperature that the air conditioner finishes changing the frost, consequently, the temperature that the air conditioner withdraws from changing the frost is difficult too big, otherwise can lead to the frost on the outdoor heat exchanger all to remove, the air conditioner still is in the state of changing the frost all the time, therefore can prolong the time of changing the frost, be unfavorable for user experience, but the temperature that the air conditioner withdraws from changing the frost is also difficult for the undersize, otherwise can not remove when the frost, the air conditioner just withdraws from the program of changing the frost, thereby can lead to changing the frost incomplete, and then lead to outdoor heat exchanger's heat exchange efficiency low. Therefore, the temperature of the air conditioner for removing the defrosting is preferably equal to or higher than 10 ℃ and equal to or lower than 20 ℃, and further, the temperature of the air conditioner for removing the defrosting is preferably equal to or higher than 15 ℃.

In any of the above embodiments, preferably, the fifth preset time period is greater than or equal to 0min and less than or equal to 5min, or the fifth preset time period is equal to 3 min.

In the embodiments, after defrosting is finished, the time for turning on the heating element is not longer, because after the melted ice water is completely removed, the heating coil is meaningless, and meanwhile, after defrosting is finished, the time for turning on the heating element is not shorter, otherwise the melted ice water cannot be completely removed, and the ice water is frosted again. Therefore, the fifth preset time period is greater than or equal to 0min and less than or equal to 5min, and further preferably, the fifth preset time period is equal to 3min, so that the ice water can be drained, and the heating element can be turned off in time after the ice water is drained, so that the energy consumption is saved.

As shown in FIG. 7, a second embodiment of the present inventionThere is provided a control device 700 of an air conditioner for the air conditioner shown in fig. 8 and 9, the air conditioner including an outdoor heat exchanger including a coil 810, a heating element being provided in the coil 810, wherein the control device 700 of the air conditioner includes: a detection unit 720 for detecting the temperature of the coil 810; a control unit 710 for controlling the detection unit 720 to detect the temperature of the coil 810 once every a preset time interval a, and recording the temperature of the coil 810 detected for the ith time as T_iAnd when i is greater than b, according to T_i+b-T_iAnd T_i-T_i-bThe difference value of the control heating element is used for controlling the opening and the closing of the heating element; the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2.

According to the control device 700 of the air conditioner provided by the embodiment of the present invention, a heating element may be provided in the coil 810 of the outdoor heat exchanger, so that the coil 810 may be heated by the heating element, the temperature of the coil 810 may be detected at a preset time interval a, and the temperature of the coil 810 detected each time may be recorded as T₁、T₂、T₃… … Tn, where n is an integer greater than or equal to 3, the temperature of the coil 810 can be obtained continuously, and then the temperature change value of the coil 810, namely T, in the same time interval can be calculated according to the temperature of the coil 810_i+b-T_iAnd T_i-T_i-bAnd T is_i+b-T_iAnd T_i-T_i-bThe difference value of (a) can show that the temperature of the coil 810 changes fast and slowly, while the temperature of the coil 810 does not change when the air conditioner frosts, and during the frosting process, the temperature of the coil 810 is lower and lower, and the temperature drops faster and faster, and after the defrosting is finished, the temperature of the coil 810 is higher and higher, and the temperature rises faster and faster, so that the T is passed_i+b-T_iAnd T_i-T_i-bThe difference value can accurately reflect the specific stage of the air conditioner, such as the frosting stage, the defrosting stage or the defrosting completion, therefore, the heating element can be turned on or off at each stage according to the actual need, so that the heating plate can be heated by the heating elementThe pipe 810 is used for reducing defrosting times, shortening defrosting period, improving heating effect, ensuring stable operation of the air conditioner and further improving use experience of users. Wherein, specifically this kind of setting, on the one hand can be when outdoor heat exchanger begins to frost, open heating element, with heating coil 810, in order to slow down the speed of frosting, this kind of setting of on the other hand can also be in the frost in-process, open heating element heating coil 810, so that can be in the refrigerant cycle process of defrosting, heat the refrigerant, so that the refrigerant can give off more heats after the operation is got up, in order to carry out the large tracts of land defrosting, this kind of setting can combine together heating element and the normal defrosting function of air conditioner promptly, so that can improve defrosting efficiency, shorten the time of defrosting, thereby make the frost on the outdoor heat exchanger can be melted fast and fall. Of course, after normal defrosting of the air conditioner is completed, the heating element can be turned on again, so that the melted ice water can be drained by the heating element, and the possibility of frost formation of the ice water is reduced.

In the above embodiment, preferably, the control unit 710 is specifically configured to determine T_i+b-T_iWhether or not less than T_i-T_i-bAnd then T is judged_i+b-T_i＜T_i-T_i-bWhen activated, the heating element is turned on so that the heating element heats coil 810.

In these embodiments, the temperature of the coil 810 remains constant when there is no frost formation, but gradually begins to drop only when frost formation begins, and drops more and more rapidly as frost formation increases, so that when T is determined_i+b-T_i＜T_i-T_i-bAt this time, it is stated that the temperature of the coil 810 is decreased more and more rapidly, and thus it can be judged that frost begins to be condensed on the outdoor heat exchanger, and it is due to frost formation that the temperature of the coil 810 is decreased, and therefore, the heating element is turned on at this time, and the coil 810 can be heated by using the heating element to slow down the condensation speed of frost, and further, the time for frost to be condensed on the heat exchanger can be prolonged, and the amount of frost to be condensed is reduced, so as to ensure the heating effect, and in addition, since the condensation speed of frost is slowed down, within the same period of time, the condensation speed of frost is decreased, and therefore, within the sameThe times of frosting of the outdoor heat exchanger can be reduced, the times of defrosting are reduced, the heating effect is improved, the stable operation of the air conditioner system is guaranteed, and the use experience of a user is improved.

Wherein, preferably, the parameter of b can be selected reasonably so that the temperature of the coil 810 satisfies T_i+b-T_i＜T_i-T_i-bAt that time, the air conditioner begins to frost or just frosts.

In the above embodiment, preferably, the control unit 710 is specifically configured to determine T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bIs greater than or equal to the first predetermined duration, the heating element is turned on so that the heating element heats coil 810.

In this embodiment, at T_i+b-T_i＜T_i-T_i-bThe duration of the time period is greater than or equal to a first preset time period, for example, 2a or 2 minutes to 10 minutes, that is, it is described that the temperature of the coil 810 decreases faster and faster within two preset time intervals, and thus it can be described that frost is more and more condensed, and at this time, the air conditioner generally needs to start a defrosting program to defrost, so that, at this time, the heating element is started to start the heating element in the process of starting defrosting of the air conditioner, so as to heat the coil 810, so that condensed frost outside the outdoor heat exchanger can be heated by using the coil 810 or the refrigerant can be heated in the refrigerant defrosting cycle process, so that the refrigerant can be heated, so that the refrigerant can emit more heat after running, so as to defrost a large area, that is, the arrangement can combine the heating element and the normal defrosting function of the air conditioner, so as to improve the defrosting efficiency, the defrosting time is shortened, so that the frost on the outdoor heat exchanger can be quickly melted, and the heat exchange efficiency of the outdoor heat exchanger can be ensured, and the heating effect of the air conditioner is ensured.

Wherein, preferably, the parameter of b can be selected reasonably so that the temperature of the coil 810 satisfies T_i+b-T_i＜T_i-T_i-bHas a long durationWhen the time is equal to the first preset time, the air conditioner begins to frost or just frosts.

In any of the above embodiments, preferably, the control unit 710 is further configured to control the detection unit 720 to detect the temperature of the coil 810, determine whether the temperature of the coil 810 is less than or equal to a temperature at which the air conditioner starts defrosting, and turn on the heating element to heat the coil 810 when the temperature of the coil 810 is determined to be less than or equal to the temperature at which the air conditioner starts defrosting.

In these embodiments, when the temperature of the coil 810 is determined to be less than or equal to the defrosting temperature of the air conditioner, that is, the air conditioner is switched to the defrosting mode, and at this time, the heating element is turned on, and the heating element can be turned on to heat the coil 810 during the process of starting defrosting of the air conditioner, so that condensed frost outside the outdoor heat exchanger can be heated or the refrigerant can be heated using the coil 810 so that during the refrigerant defrosting cycle, the refrigerant is heated so that the refrigerant can emit more heat after running to defrost in a large area, namely, the arrangement can combine the heating element with the normal defrosting function of the air conditioner so as to improve the defrosting efficiency and shorten the defrosting time, thereby the frost on the outdoor heat exchanger can be melted rapidly, and then the heat exchange efficiency of the outdoor heat exchanger can be ensured, so that the heating effect of the air conditioner is ensured.

In any of the above embodiments, preferably, the control unit 710 is specifically configured to determine T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bIs greater than or equal to the second predetermined time period, the heating element is turned on so that the heating element heats coil 810.

In these embodiments, after the air conditioner starts the defrosting mode, the outdoor heat exchanger has less and less frost, and therefore, the temperature of the coil 810 is higher and higher, and the judgment T is made_i+b-T_i＞T_i-T_i-bThe duration of time is greater than or equal to the second predetermined time, which indicates that the temperature of the coil 810 is constant for a period of timeThe temperature of the water in the outdoor heat exchanger is increased more and more, so that the frost on the outdoor heat exchanger is almost melted, and the air conditioner exits the defrosting mode at the moment, the heating element is turned on, and the heating element can be turned on after the normal defrosting of the air conditioner is finished, so that the melted ice water can be drained by the heating element, and the possibility of the ice water being frosted again is reduced.

In any of the above embodiments, preferably, the control unit 710 is further configured to control the detection unit 720 to detect the temperature of the coil 810, and when the temperature of the coil 810 is determined to be greater than or equal to the defrosting temperature of the air conditioner, turn on the heating element, so that the heating element heats the coil 810.

In these embodiments, when the temperature of the coil 810 is determined to be greater than or equal to the temperature at which the air conditioner exits from defrosting, that is, the air conditioner exits from the defrosting mode, and the heating element is turned on at this time, the heating element can be turned on after the air conditioner completes normal defrosting, so that the heating element can be used to drain off the melted ice water, and the possibility of the ice water frosting again can be reduced.

In any of the above embodiments, preferably, the idle control unit 710 is further configured to turn off the heating element after turning on the heating element for a third predetermined period of time to heat the coil 810.

In these embodiments, the heating element can be turned off after the heating element heating coil 810 is turned on at any stage for a period of time, so that the heating element can automatically stop heating, wherein the heating duration of the heating element can be set according to the heating time when the heating element is turned on, and specifically, for example, T is determined at the early stage of frosting of the air conditioner_i+b-T_i＜T_i-T_i-bWhen the heating element is turned on later, the third preset time period may be set to be in a range of 20min or more and 30min or less, or further preferably, the third preset time period is set to be 25min, because the time interval from the start of the air conditioner to the start of defrosting is about 30min, so that the setting can stop the heating element from heating for a certain time before the air conditioner starts the defrosting mode to avoid the heating element from being in the heating state for a long timeAnd further prevent the heating element from being damaged due to long-time work, and meanwhile, the heating time of the heating element can be reasonably set by the arrangement, so that the energy consumption of the air conditioner is reduced. And in the defrosting process of the air conditioner, T is judged_i+b-T_i＜T_i-T_i-bAfter the duration time is greater than or equal to the first preset time period, the third preset time period may be set to be within a range of greater than or equal to 9min and less than or equal to 15min when the heating element is turned on, or further preferably, the third preset time period is set to be 12min, because the defrosting time of the air conditioner is generally about 15min, therefore, the setting enables the heating element to stop heating for a period of time before the air conditioner exits the defrosting mode, so that when the heating coil 810 needs to be continued after the air conditioner exits the defrosting mode, the heating element can be heated at intervals in each interval needing heating, and further, the heating element can be prevented from being in the working state for a long time, and thus, the heating element can be prevented from being damaged due to long-time working. Wherein, after the air conditioner exits the defrosting mode, T is judged_i+b-T_i＞T_i-T_i-bAfter the duration time of the heating coil 810 is longer than or equal to the second preset time, the third preset time may be set to be greater than 0min and less than or equal to 5min, or further preferably, the third preset time is set to be 3min, and after defrosting is finished, the ice water can be drained away, and the heating element can be timely turned off after the ice water is drained away, so as to save energy consumption.

In the above embodiment, preferably, the control unit 710 is further configured to determine T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a fourth preset time length or not, and judging T_i+b-Ti＞T_i-T_i-bWhen the duration time is longer than or equal to the fourth preset duration time, the heating element is closed; and the fourth preset time length is equal to the sum of the second preset time length and the fifth preset time length.

In this embodiment, T may be determined_i+b-T_i＜T_i-T_i-bThen, the heating element is turned on to heat the coil 810, and the air conditioner determines T when the heating element is turned on all the time during the defrosting process_i+b-T_i＞T_i-T_i-bWhen the duration of time is greater than or equal to the second preset time, the air conditioner exits the defrosting mode, and then the heating element heating coil 810 is continuously controlled for a fifth preset time, preferably 3 minutes, so that the ice water can be drained and prevented from being condensed again. This kind of scheme can be frosted to changing the frost, again to the whole in-process that changes the frost and end, opens heating element always to make heating element can be frosted to changing the frost, again to the whole in-process that changes the frost and end, homoenergetic heating coil 810, and this kind of setting can accelerate change the frost speed, shortens to change the frost cycle, reduces the air conditioner to heating element's control work load, and then can improve the effect of heating.

In another embodiment, the control apparatus 700 of the air conditioner further includes: the control unit 710 is further configured to detect a temperature of the coil 810, and turn off the heating element when it is determined that a duration of the temperature of the coil 810 is greater than or equal to a temperature at which the air conditioner exits defrosting is greater than or equal to a fifth preset duration.

In this embodiment, T may be determined_i+b-T_i＜T_i-T_i-bThen, the heating element is turned on to heat the coil 810, and it is ensured that the heating element is turned on during the defrosting process until the temperature of the coil 810 is higher than the temperature at which the air conditioner exits the defrosting mode, and after the temperature of the coil 810 is higher than the temperature at which the air conditioner exits the defrosting mode, the heating element continues to heat the coil 810 for a fifth preset time period, preferably 3 minutes, and then the heating element is turned off to drain off the ice water, so as to prevent the ice water from being condensed again. This kind of scheme can be frosted to changing the frost, and the whole in-process that the frost ended again to changing the frost opens heating element always to make heating element can be frosted to changing the frost, again to the whole in-process that the frost ended, homoenergetic heating coil 810, this kind of setting can accelerate the speed of changing the frost, shortens the period of changing the frost, reduces the air conditioner to heating element's control work load, and then can be abilityThe heating effect can be improved.

In any of the above embodiments, preferably, the control unit 710 is further configured to detect the starting frequency N of the defrosting program started by the air conditioner after the air conditioner is started at this time before the temperature of the coil 810 is detected once every a preset time interval a, and assign a preset time interval a to 0.5N when N is greater than or equal to 1 and a-0.5N is greater than or equal to e; wherein the initial value of N is 0, N is an integer greater than or equal to 0, and e is greater than or equal to 0 and less than or equal to a.

In these embodiments, in a period from each time the air conditioner is turned on to off, 1 may be added to the value of the number N of times the defrosting process is started every time the defrosting process is started, and after the air conditioner completes one defrosting process, the value of the preset time interval a for detecting the temperature of the coil 810 is adjusted, that is, a is reassigned to a-0.5N, and the temperature of the coil 810 is detected according to the reassigned a. This kind of setting, at the same start-up in-process of air conditioner, if need carry out when changing frost many times, reduce in proper order through the predetermined time interval after will changing frost for the first time, can detect the condition of condensing of the frost on the outdoor heat exchanger more accurately to can be more timely change frost, in order to prevent that the frost from excessively condensing, simultaneously, this kind of change frost mode is compared in current change frost mode, and it is undulant little that indoor temperature is undulant during change frost, therefore can improve user experience. Specifically, for example, when a is equal to 2 minutes, N is equal to 0 during the first defrosting after the air conditioner is started up, so that the temperature of the coil can be detected every 2 minutes, and when the air conditioner is defrosted for the second time, N is equal to 1, so that the temperature of the coil can be detected every 1.5 minutes.

In any of the above embodiments, preferably, the control unit 710 is further configured to keep the preset time interval constant when N ≧ 1 and a-0.5N is less than e.

In the embodiments, when a is continuously assigned, a is gradually reduced, and after a is reduced to a specific value, the value of a is not adjusted by the defrosting times, but is kept as the value assigned last time, so that on one hand, a can be prevented from being assigned to be a negative number, and on the other hand, a can be prevented from being excessively reduced in subsequent values, which results in too short time intervals. Specifically, for example, when a is equal to 2 minutes and e is equal to 1, N is equal to 0 when defrosting is performed for the first time after the air conditioner is started, so that the temperature of the coil can be detected and recorded every 2 minutes, and when defrosting is performed for the second time, N is equal to 1, so that the temperature of the coil can be detected and recorded every 1.5 minutes, and when N is equal to 4, a-0.5N is equal to 0 and 0 is less than e, so that a is not re-assigned to keep constant, and when N is equal to 3, a is assigned to 0.5(a-0.5N is 0.5), so that when N is greater than or equal to 4, the temperature of the coil is detected and recorded every 0.5 minutes.

In any of the above embodiments, preferably, the control unit 710 is further configured to clear the starting number N and reset the preset time interval a when the air conditioner is turned off or when the air conditioner is turned on and started.

In the embodiments, when the air conditioner is turned off or on, the value of the preset time interval a can be reset to an initial value, and the starting times N of the defrosting program started by the air conditioner are reset to zero.

In these embodiments, the time for turning on the heating element after defrosting is not longer, because it is meaningless in the heating coil 810 after the melted ice water is completely removed, and at the same time, the time for turning on the heating element after defrosting is not shorter, otherwise the melted ice water cannot be completely removed, which may cause the ice water to be defrosted again. Therefore, the fifth preset time period is greater than or equal to 0min and less than or equal to 5min, and further preferably, the fifth preset time period is equal to 3min, so that the ice water can be drained, and the heating element can be turned off in time after the ice water is drained, so that the energy consumption is saved.

As shown in fig. 8 and 9, an embodiment of the third aspect of the present invention provides an air conditioner 800, the air conditioner 800 including: an outdoor heat exchanger comprising a coil 810; a heating assembly 820 mounted within the coil 810, the heating assembly 820 comprising a mounting housing and a heating element disposed within the mounting housing; and a control device 700 of an air conditioner provided in any one of the embodiments of the second aspect.

The air conditioner 800 provided by the embodiment of the third aspect of the present invention includes an outdoor heat exchanger and a heating assembly 820 installed in a coil 810 of the outdoor heat exchanger, and the control device 700 of the air conditioner provided by any one of the embodiments of the second aspect, and therefore, the beneficial effects of the control device 700 of the air conditioner provided by any one of the embodiments of the second aspect are not repeated herein.

In the above embodiment, preferably, the mounting housing is a mounting tube, which is mounted within the coiled tube 810.

In such embodiments, it may be preferable to configure the mounting housing as a mounting tube so that the mounting tube and coil 810 can be jacketed to facilitate mounting of the mounting housing, and to also enable a conventional heating tube to be mounted within the mounting tube for use as a heating element. Meanwhile, the heating assembly 820 is common and is easy to purchase, so that the cost of the product can be reduced.

In the above embodiment, it is preferable that the mounting case is a U-shaped mounting pipe, the coil 810 is a serpentine pipe in which a plurality of U-shaped pipes are connected to each other, and the U-shaped mounting pipe is mounted in one of the U-shaped pipes.

In such embodiments, it may be preferable to provide the coil 810 as a serpentine tube formed by connecting a plurality of U-shaped tubes to each other, because such a coil 810 is common and is often used in outdoor heat exchangers, and thus is easily purchased, so that the production cost can be reduced, and at this time, it may be preferable to provide the mounting case as a U-shaped mounting tube, so that the shapes of the coil 810 and the mounting case can be adapted to each other, so that the structure of the product can be more reasonably compact. Meanwhile, the U-shaped mounting tube increases the heat dissipation area, thereby increasing the heating efficiency of the heating assembly 820.

Wherein the installation pipe is preferably installed in a U-shaped pipe at the lowermost end of the coil tube 810, i.e., in a U-shaped pipe closest to the chassis of the outdoor unit of the air conditioner.

In the above embodiment, preferably, the air conditioner further includes: at least one support 830 disposed within the coil 810 for supporting the heating assembly 820 within the coil 810.

In such embodiments, the air conditioner further comprises a support 830, and in particular, the heating assembly 820 can be supported and mounted in the coil 810 by the support 830, and such an arrangement enables the positioning and mounting of the heating assembly 820 in the coil 810 by the support 830, and in particular, enables the axial and radial positioning and mounting of the heating assembly 820 in the coil 810. Wherein preferably the mounting tube is mounted in the middle of a section of the serpentine tube.

Wherein, preferably, the support 830 is a support ring, and the number of the supports 830 is plural.

In the description of the present specification, the description of the term "one embodiment" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method of an air conditioner is used for the air conditioner, the air conditioner comprises an outdoor heat exchanger, the outdoor heat exchanger comprises a coil, a heating element is arranged in the coil, and the control method of the air conditioner comprises the following steps:

detecting the temperature of the coil pipe once every preset time interval a, and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, according to T_i+b-T_iAnd T_i-T_i-bThe difference value of (a) controls the opening and closing of the heating element;

the unit of the preset time interval a is minutes, a is a positive number, the initial value of i is 1, i is an integer greater than or equal to 1, and b is a natural number greater than or equal to 2;

before the temperature of the coil is detected once every preset time interval a, the control method of the air conditioner further comprises the following steps:

detecting the starting times N of the air conditioner starting defrosting program after the air conditioner is started at the time, and assigning a preset time interval a to 0.5N when N is more than or equal to 1 and a-0.5N is more than or equal to e;

wherein the initial value of N is 0, N is an integer greater than or equal to 0, and e is greater than or equal to 0 and less than or equal to a.

2. The control method of an air conditioner according to claim 1, wherein said according to T_i+b-T_iAnd T_i-T_i-bThe step of controlling the opening and closing of the heating element specifically comprises:

judgment of T_i+b-T_iWhether or not less than T_i-T_i-bAnd then T is judged_i+b-T_i＜T_i-T_i-bWhen the heating element is turned on, the heating element heats the coil.

3. The control method of an air conditioner according to claim 1,

said according to T_i+b-T_iAnd T_i-T_i-bThe step of controlling the opening and closing of the heating element specifically comprises: judgment of T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bWhen the duration time is longer than or equal to the first preset duration time, the heating element is started to heat the coil pipe; or

The control method of the air conditioner further includes: and detecting the temperature of the coil, judging whether the temperature of the coil is less than or equal to the defrosting starting temperature of the air conditioner, and starting the heating element when the temperature of the coil is less than or equal to the defrosting starting temperature of the air conditioner so that the heating element heats the coil.

4. The control method of an air conditioner according to claim 1,

said according to T_i+b-T_iAnd T_i-T_i-bThe step of controlling the opening and closing of the heating element specifically comprises; judgment of T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to a second preset duration time, starting the heating element to enable the heating element to heat the coil pipe; or

The control method of the air conditioner further includes: and detecting the temperature of the coil, and starting the heating element when judging that the temperature of the coil is more than or equal to the temperature of the air conditioner for quitting defrosting so that the heating element heats the coil.

5. The control method of an air conditioner according to any one of claims 1 to 4, further comprising:

and after the heating element is started to heat the coil for a third preset time, the heating element is closed.

6. The control method of an air conditioner according to any one of claims 2 to 4, further comprising:

judgment of T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a fourth preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to a fourth preset duration time, closing the heating element; the fourth preset time length is equal to the sum of the second preset time length and the fifth preset time length; or

And detecting the temperature of the coil pipe, and closing the heating element when the duration of the temperature of the coil pipe is judged to be more than or equal to the temperature of the air conditioner for quitting defrosting is more than or equal to a fifth preset duration.

7. The control method of an air conditioner according to claim 1,

when N is more than or equal to 1 and a-0.5N is less than e, keeping the preset time interval unchanged; and/or

And when the air conditioner is turned off or is turned on and started, resetting the starting times N and resetting the preset time interval a.

8. The utility model provides a controlling means of air conditioner for the air conditioner, the air conditioner includes outdoor heat exchanger, outdoor heat exchanger includes the coil pipe, be provided with heating element in the coil pipe, its characterized in that, the controlling means of air conditioner includes:

the detection unit is used for detecting the temperature of the coil pipe;

the control unit is used for controlling the detection unit to detect the temperature of the coil pipe once every preset time interval a and recording the temperature of the coil pipe detected for the ith time as T_iAnd when i is greater than b, according to T_i+b-T_iAnd T_i-T_i-bThe difference value of (a) controls the opening and closing of the heating element;

the control unit is also used for detecting the starting times N of the defrosting program started by the air conditioner after the air conditioner is started at the time before the temperature of the coil pipe is detected once every preset time interval a, and assigning the preset time interval a to be a-0.5N when N is more than or equal to 1 and a-0.5N is more than or equal to e;

9. The control device of an air conditioner according to claim 8,

the control unit is specifically configured to determine T_i+b-T_iWhether or not less than T_i-T_i-bAnd then T is judged_i+b-T_i＜T_i-T_i-bWhen the heating element is turned on, the heating element heats the coil.

10. The control device of an air conditioner according to claim 8,

the control unit is specifically configured to determine T_i+b-T_i＜T_i-T_i-bWhether the duration time is greater than or equal to a first preset time length or not, and judging T_i+b-T_i＜T_i-T_i-bWhen the duration time is longer than or equal to the first preset duration time, the heating element is started to heat the coil pipe; or

The control unit is also used for controlling the detection unit to detect the temperature of the coil pipe, judging whether the temperature of the coil pipe is less than or equal to the defrosting starting temperature of the air conditioner, and starting the heating element when the temperature of the coil pipe is less than or equal to the defrosting starting temperature of the air conditioner so that the heating element heats the coil pipe.

11. The control device of an air conditioner according to claim 8,

the control unit is specifically configured to determine T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a second preset time length or not, and judging T_i+b-T_i＞T_i-T_i-bWhen the duration time is longer than or equal to a second preset duration time, starting the heating element to enable the heating element to heat the coil pipe; or

The control unit is also used for controlling the detection unit to detect the temperature of the coil pipe, and when the temperature of the coil pipe is judged to be more than or equal to the temperature that the air conditioner exits defrosting, the heating element is started so that the heating element heats the coil pipe.

12. The control device of the air conditioner according to any one of claims 8 to 11,

the control unit is further configured to turn off the heating element after turning on the heating element to heat the coil for a third preset duration.

13. The control device of an air conditioner according to any one of claims 9 to 11,

the control unit is also used for judging T_i+b-T_iGreater than or equal to T_i-T_i-bWhether the duration time is greater than or equal to a fourth preset time length or not, and judging T_i+b-Ti＞T_i-T_i-bWhen the duration time is longer than or equal to a fourth preset duration time, closing the heating element; the fourth preset time length is equal to the sum of the second preset time length and the fifth preset time length; or

The control unit is further used for detecting the temperature of the coil pipe and closing the heating element when the duration time of the temperature of the coil pipe is judged to be greater than or equal to the temperature of the air conditioner for quitting defrosting is greater than or equal to a fifth preset time length.

14. The control device of an air conditioner according to claim 8,

the control unit is also used for keeping the preset time interval unchanged when N is more than or equal to 1 and a-0.5N is less than e; and/or

The control unit is further configured to clear the starting times N and reset the preset time interval a when the air conditioner is turned off or when the air conditioner is turned on.

15. An air conditioner, comprising:

an outdoor heat exchanger comprising a coil;

a heating assembly mounted within the coil, the heating assembly including a mounting housing and a heating element disposed within the mounting housing; and

and a control device of an air conditioner according to any one of claims 8 to 14.

16. The air conditioner according to claim 15,

the mounting shell is a mounting pipe, and the mounting pipe is mounted in the coil pipe; and/or

The installation shell is a U-shaped installation pipe, the coil pipe is a coiled pipe formed by mutually connecting a plurality of U-shaped pipes, and the U-shaped installation pipe is installed in one U-shaped pipe.

17. The air conditioner according to claim 15 or 16, further comprising:

at least one support disposed within the coil, the heating assembly being mounted within the coil by the support.