Control method of air conditioner and air conditioner

Abstract

The invention discloses a control method of an air conditioner and the air conditioner, the air conditioner comprises an indoor unit coil pipe and an electric heating piece, and the control method comprises the steps that the temperature of the indoor unit coil pipe and the indoor environment temperature are detected; according to the temperature of the indoor unit coil pipe and the temperature difference between the temperature of the indoor unit coil pipe and the environment temperature, a target power value is obtained; and the maximum power value of the electric heating piece is obtained, and the operation gear of the electric heating piece is selected according to the target power value and the maximum power value. Therefore, by arranging the air conditioner, the operation gear of the electric heating piece can be selected according to the temperature of the indoor unit coil pipe, the temperature difference between the temperature of the indoor unit coil pipe and the environment temperature and the maximum power value of the electric heating piece, the energy loss of the air conditioner can be reduced, the number of adjustment times of the electric heating piece in the operation process is small, and the service life of the air conditioner is prolonged. The air outlet temperature of the air conditioner can be stable, and the comfort level of a user is improved.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, and in particular to a control method of an air conditioner and an air conditioner. Background Art

[0002] The heating efficiency of the indoor unit coil is limited. When the ambient temperature is low, the heating time of the air conditioner is long and the heating effect is poor. The heat needs to be supplemented by the electric heating element to ensure that the air conditioner has sufficient heating power. In the related art, once the electric heating element is turned on, its power cannot be adjusted. The electric heating element will maintain the maximum power, resulting in a large energy consumption of the air conditioner. There is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a control method for an air conditioner, which can reduce the energy loss of the air conditioner by adjusting the operating gear of the electric heating element.

[0004] According to the control method of the air conditioner of an embodiment of the present invention, the air conditioner includes an indoor unit coil and an electric heating element, and the control method includes: detecting the temperature of the indoor unit coil and the indoor ambient temperature; obtaining a target power value according to the temperature of the indoor unit coil, the temperature of the indoor unit coil and the temperature difference of the ambient temperature; obtaining the maximum power value of the electric heating element, and selecting the operating gear of the electric heating element according to the target power value and the maximum power value.

[0005] According to the control method of the air conditioner in the embodiment of the present invention, by setting the air conditioner, the operating gear of the electric heating element can be selected according to the temperature of the indoor unit coil, the temperature difference between the temperature of the indoor unit coil and the ambient temperature, and the maximum power value of the electric heating element, which is beneficial to reducing the energy loss of the air conditioner, and the number of adjustments of the electric heating element during operation is small, so that the air outlet temperature of the air conditioner can be relatively stable, thereby improving the comfort of the user.

[0006] According to some embodiments of the present invention, the control method of the air conditioner, the target power value is obtained according to the temperature of the indoor unit coil, the temperature difference between the indoor unit coil and the ambient temperature, including: obtaining a preliminary power value according to the temperature of the indoor unit coil; obtaining a supplementary coefficient according to the temperature difference between the indoor unit coil and the ambient temperature; and multiplying the preliminary power value by the supplementary coefficient to obtain the target power value. The above implementation can obtain the target power value more conveniently and accurately, which is conducive to improving the adjustment accuracy of the air conditioner.

[0007] According to the control method of the air conditioner of some embodiments of the present invention, the temperature of the indoor unit coil is divided into a plurality of temperature intervals, and each temperature interval has a corresponding preliminary power value. The above implementation can avoid frequent adjustment of the electric heating element caused by the temperature change of the indoor unit coil, so that the air outlet temperature of the air conditioner is more stable, which is conducive to improving the comfort of the user.

[0008] According to the control method of the air conditioner of some embodiments of the present invention, the temperature difference between the temperature of the indoor unit coil and the ambient temperature has multiple temperature difference intervals, and each temperature difference interval has a corresponding supplementary coefficient. The above implementation can avoid frequent adjustment of the electric heating element caused by the change of temperature difference, so that the air outlet temperature of the air conditioner is more stable, which is conducive to improving the comfort of the user.

[0009] According to some embodiments of the present invention, the method for controlling an air conditioner, wherein obtaining the maximum power value of the electric heating element comprises: obtaining the actual voltage of the electric heating element; and obtaining the maximum power value of the electric heating element according to the actual voltage. The above implementation can more accurately adjust the power of the electric heating element, thereby improving the air outlet effect of the air conditioner.

[0010] According to the control method of the air conditioner of some embodiments of the present invention, the selecting the operating gear of the electric heating element according to the target power value and the maximum power value includes: dividing a plurality of the operating gears according to the maximum power value; selecting the operating gear at an operating power value close to the target power value; wherein, when the target power value is between the operating power values ​​corresponding to two operating gears, selecting the operating gear corresponding to the larger operating power value. The above implementation can ensure that the air conditioner has sufficient heating efficiency, which is conducive to reducing the waiting time of the user and improving the comfort of the user.

[0011] According to the control method of the air conditioner of some embodiments of the present invention, the maximum power value is divided into a plurality of operating gears at equal intervals. The above implementation can realize the reasonable arrangement of the operating gears, which is conducive to improving the heating effect of the air conditioner.

[0012] According to the control method of the air conditioner of some embodiments of the present invention, the air conditioner includes a debugging stage, in which the electric heating element is controlled to operate at the operating gear, and the operating gear is raised by one level at each set time interval; in the debugging stage, the temperature of the indoor unit coil, the ambient temperature, and the maximum power value of the electric heating element are obtained to select the operating gear. The above implementation can reduce the impact caused by the electric heating element during the startup process, which is conducive to improving the operating stability of the air conditioner.

[0013] According to the control method of the air conditioner of some embodiments of the present invention, the setting time ranges from 5s to 20s. The above implementation can give the electric heating element enough buffer time and can ensure the heating efficiency of the air conditioner to a certain extent, which is conducive to improving the comfort of the user.

[0014] The invention also provides an air conditioner.

[0015] According to an air conditioner of an embodiment of the present invention, the air conditioner is applicable to the control method described in any one of the above embodiments, and the air conditioner comprises: a detection module, the detection module is used to detect the temperature of the indoor unit coil and the ambient temperature, and obtain the maximum power value of the electric heating element; a control module, the control module is used to obtain a target power value according to the temperature of the indoor unit coil, the temperature difference between the temperature of the indoor unit coil and the ambient temperature, and select the operating gear of the electric heating element according to the target power value and the maximum power value.

[0016] According to the air conditioner of the embodiment of the present invention, the power of the electric heating element can be adjusted during the heating process, which is beneficial to reducing the loss of the air conditioner and can make the air outlet temperature of the air conditioner more stable, which is beneficial to improving the comfort of the user.

[0017] According to some embodiments of the air conditioner of the present invention, the control module includes: a plurality of relays, the plurality of relays are used to control the operating gear of the electric heating element step by step. The above embodiment can conveniently control the electric heating element to switch the operating gear, thereby improving the reliability of the air conditioner.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 The process of the control method of the air conditioner according to the embodiment of the present invention is as follows: Figure 1 ;

[0021] Figure 2 The process of the control method of the air conditioner according to the embodiment of the present invention is as follows: Figure 2 ;

[0022] Figure 3 is a schematic diagram of the relationship between the preliminary power value and the indoor unit coil temperature according to an embodiment of the present invention;

[0023] Figure 4is a schematic diagram of the relationship between the supplementary coefficient and the temperature difference between the temperature of the indoor unit coil and the ambient temperature according to an embodiment of the present invention;

[0024] Figure 5 The process of the control method of the air conditioner according to the embodiment of the present invention is as follows: Figure 3 ;

[0025] Figure 6 is a schematic diagram of the relationship between the actual voltage and the maximum power value according to an embodiment of the present invention;

[0026] Figure 7 The process of the control method of the air conditioner according to the embodiment of the present invention is as follows: Figure 4 ;

[0027] Figure 8 is a schematic diagram of the relationship between the operating gear and the operating power value according to an embodiment of the present invention;

[0028] Fig. 9 is a structural schematic diagram of an air conditioner according to an embodiment of the present invention;

[0029] Fig.10 Schematic diagram of the connection between the control module and the electric heating element according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] air conditioner 100, external power supply 200,

[0032] Control module 1, relay 11, detection module 2, electric heating element 3. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Hereinafter, a method for controlling an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0037] It should be noted that the air conditioner 100 includes an indoor unit coil and an electric heating element 3, wherein a refrigerant flows through the indoor unit coil, and the electric heating element 3 may be a resistance wire. The indoor unit coil is used to cool the airflow in the cooling mode so that the air conditioner 100 can blow out cold air; the indoor unit coil is used to heat the airflow in the heating mode so that the air conditioner 100 can blow out hot air, and the electric heating element 3 may heat the airflow in the heating mode to increase the temperature of the airflow, thereby improving the heating efficiency of the air conditioner 100.

[0038] like Figure 1 As shown, the control method of the air conditioner according to the embodiment of the present invention includes:

[0039] S10: Detecting the temperature of the indoor unit coil and the indoor ambient temperature. That is, when the electric heating element 3 is in the start-up state, the detection module 2 can detect through the temperature sensor to obtain the temperature of the indoor unit coil and the indoor ambient temperature.

[0040] S20: Obtain the target power value according to the temperature of the indoor unit coil and the temperature difference between the indoor unit coil and the ambient temperature. That is, after the detection module 2 obtains the temperature of the indoor unit coil and the ambient temperature, the temperature of the indoor unit coil and the ambient temperature can be transmitted to the control module 1, and the control module 1 can subtract the temperature of the indoor unit coil from the ambient temperature to obtain the temperature difference, and then obtain the target power value of the electric heating element 3 according to the temperature of the indoor unit coil and the temperature difference.

[0041] It should be noted that the lower the temperature of the indoor unit coil, the greater the target power value of the electric heating element 3; the greater the temperature difference between the temperature of the indoor unit coil and the ambient temperature, the greater the target power value of the electric heating element 3.

[0042] S30: Obtain the maximum power value of the electric heating element 3, and select the operating gear of the electric heating element 3 according to the target power value and the maximum power value. That is, after determining the target power value of the electric heating element 3, the detection module 2 can obtain the maximum power value of the electric heating element 3, and transmit the maximum power value to the control module 1. The control module 1 divides a plurality of operating gears according to the maximum power value, and matches the target power value with the operating power corresponding to the operating gear to select a suitable operating gear, and then controls the electric heating element 3 to operate at the operating gear.

[0043] According to the control method of the air conditioner in the embodiment of the present invention, by setting the air conditioner 100, the operating gear of the electric heating element 3 can be selected according to the temperature of the indoor unit coil, the temperature difference between the temperature of the indoor unit coil and the ambient temperature, and the maximum power value of the electric heating element 3, which is beneficial to reducing the energy loss of the air conditioner 100, and the number of adjustments of the electric heating element 3 during operation is small, so that the air outlet temperature of the air conditioner 100 can be relatively stable, thereby improving the user's comfort.

[0044] In some embodiments of the present invention, Figure 2 As shown, according to the temperature of the indoor unit coil, the temperature difference between the indoor unit coil and the ambient temperature, the target power value is obtained, including:

[0045] S21: Obtaining a preliminary power value according to the temperature of the indoor unit coil. That is, after the control module 1 receives the temperature of the indoor unit coil, the control module 1 can directly obtain a preliminary power value according to the temperature of the indoor unit coil. It should be noted that the correspondence between the temperature of the indoor unit coil and the preliminary power value is preset by the engineering personnel based on the experimental data, and will not be repeated here.

[0046] S22: Obtain the supplementary coefficient according to the temperature difference between the indoor unit coil temperature and the ambient temperature. That is, after the control module 1 receives the ambient temperature, the control module 1 can subtract the temperature of the indoor unit coil from the ambient temperature to obtain the temperature difference, and then directly obtain the supplementary coefficient according to the temperature difference. It should be noted that the corresponding relationship between the temperature difference and the supplementary coefficient is preset by the engineering personnel based on the experimental data, and will not be repeated here.

[0047] S23: Multiply the preliminary power value by the supplementary coefficient to obtain the target power value. That is, after the control module 1 obtains the preliminary power value and the supplementary coefficient, the preliminary power value can be multiplied by the supplementary coefficient to obtain the target power value. In this way, the target power value can be obtained more conveniently and accurately, which is conducive to improving the adjustment accuracy of the air conditioner 100.

[0048] In some embodiments of the present invention, Figure 3 As shown, the temperature of the indoor unit coil can be divided into multiple temperature intervals, and each temperature interval has a corresponding preliminary power value.

[0049] Specifically, the preset maximum power value can be set to P0, and the preset maximum power value can be the maximum power value of the electric heating element 3 under normal pressure (such as 220V), and the temperature of the indoor unit coil is divided into five temperature intervals. When the temperature of the indoor unit coil is less than T1, the temperature of the indoor unit coil is in the first temperature interval, and the preliminary power value corresponding to the first temperature interval is P0; when the temperature of the indoor unit coil is greater than or equal to T1 and less than T2, the temperature of the indoor unit coil is in the second temperature interval, and the preliminary power value corresponding to the second temperature interval is P1; when the temperature of the indoor unit coil is greater than or equal to T2 and less than T3, the temperature of the indoor unit coil is in the third temperature interval, and the preliminary power value corresponding to the third temperature interval is P2; when the temperature of the indoor unit coil is greater than or equal to T3 and less than T4, the temperature of the indoor unit coil is in the fourth temperature interval, and the preliminary power value corresponding to the fourth temperature interval is P3; when the temperature of the indoor unit coil is greater than or equal to T4, the temperature of the indoor unit coil is in the fifth temperature interval, and the preliminary power value corresponding to the fifth temperature interval is P4.

[0050] Exemplarily, T0 can be set to -40°C, T1 can be set to 20°C, T2 can be set to 30°C, T3 can be set to 40°C, T4 can be set to 50°C, and T5 can be set to 70°C; P1 can be set to 4 / 5P0 (that is, four fifths of the preset maximum power value), P2 can be set to 3 / 5P0, P3 can be set to 2 / 5P0, and P4 can be set to 1 / 5P0.

[0051] Through the above arrangement, it is possible to avoid frequent adjustment of the electric heating element 3 caused by temperature changes of the indoor unit coil, so that the air outlet temperature of the air conditioner 100 is more stable, which is beneficial to improving the user's comfort.

[0052] In some embodiments of the present invention, Figure 4 As shown, the temperature difference between the temperature of the indoor unit coil and the ambient temperature has multiple temperature difference intervals, and each temperature difference interval has a corresponding supplementary coefficient.

[0053] Specifically, the temperature difference between the temperature of the indoor unit coil and the ambient temperature can be divided into five temperature difference intervals. When the temperature difference is less than C0, the temperature difference is in the first temperature difference interval, and the supplementary coefficient corresponding to the first temperature difference interval is H0; when the temperature difference is greater than or equal to C0 and less than C1, the temperature difference is in the second temperature difference interval, and the supplementary coefficient corresponding to the second temperature difference interval is H1; when the temperature difference is greater than or equal to C1 and less than C2, the temperature difference is in the third temperature difference interval, and the supplementary coefficient corresponding to the third temperature difference interval is H2; when the temperature difference is greater than or equal to C2 and less than C3, the temperature difference is in the fourth temperature difference interval, and the supplementary coefficient corresponding to the fourth temperature difference interval is H3; when the temperature difference is greater than or equal to C3℃, the temperature difference is in the fifth temperature difference interval, and the supplementary coefficient corresponding to the fifth temperature difference interval is H4.

[0054] Exemplarily, C0 may be set to 5°C, C1 may be set to 10°C, C2 may be set to 15°C, C3 may be set to 20°C, C4 may be set to 25°C, H0 may be set to 1, H1 may be set to 1.2, H2 may be set to 1.3, H3 may be set to 1.5, and H4 may be set to 1.7.

[0055] Through the above arrangement, it is possible to avoid frequent adjustment of the electric heating element 3 caused by changes in temperature difference, so that the air outlet temperature of the air conditioner 100 is more stable, which is beneficial to improving the comfort of the user.

[0056] In some embodiments of the present invention, Figure 5-Figure 6 As shown, obtaining the maximum power value of the electric heating element 3 includes:

[0057] S31 : Acquire the actual voltage of the electric heating element 3 . That is, the detection module 2 can acquire the current voltage of the air conditioner 100 to obtain the actual voltage of the electric heating element 3 .

[0058] S32: Obtain the maximum power value of the electric heating element according to the actual voltage. That is to say, after the detection module 2 obtains the actual voltage of the electric heating element 3, the maximum power value of the electric heating element can be directly obtained according to the actual voltage. It should be noted that the correspondence between the actual voltage and the maximum power value is preset by the engineering personnel according to the experimental data, and will not be repeated here. In this way, the power of the electric heating element can be adjusted more accurately, thereby improving the air outlet effect of the air conditioner.

[0059] In some embodiments of the present invention, Figure 7 As shown, the operating gear of the electric heating element 3 is selected according to the target power value and the maximum power value, including:

[0060] S3: Divide into multiple operating gears according to the maximum power value. That is, after the control module 1 obtains the maximum power value of the electric heating element 3, multiple operating gears can be divided according to the maximum power value, and each operating gear has a corresponding operating power.

[0061] S34: Selecting an operating gear having an operating power value close to the target power value; wherein, when the target power value is between the operating power values ​​corresponding to two operating gears, selecting the operating gear corresponding to the larger operating power value.

[0062] That is to say, the target power value can be compared with the operating powers corresponding to multiple operating gears one by one, and the operating gear with an operating power value close to the target power value can be selected. The closeness here is not limited to the closest, as long as the operating power value is close to the target power value. When there is only one operating gear with an operating power close to the target power, the operating gear is directly selected; and when the target power value is between the operating power values ​​corresponding to two operating gears, the operating gear corresponding to the larger operating power value is selected. In this way, it can be ensured that the air conditioner 100 has sufficient heating efficiency, which is conducive to reducing the waiting time of the user and improving the comfort of the user.

[0063] Exemplarily, the operating gear can be set to include a first operating gear, a second operating gear and a third operating gear, the first operating gear corresponds to a first operating power value, the second operating gear corresponds to a second operating power value, the third operating gear corresponds to a third operating power value, the first operating power value is less than the second operating power value, and the second operating power value is less than the third operating power value. When the target power value is less than the first operating power value, the first operating gear is selected; when the target power value is greater than the first operating power value and less than the second operating power value, the second operating gear is selected; when the target power value is greater than the third operating power value, the third operating gear is selected.

[0064] In some embodiments of the present invention, the maximum power value may be divided into a plurality of operating gears at equal intervals, such as three operating gears, four operating gears, five operating gears, etc. For example, Figure 8 As shown, the maximum power value can be set to P, and the maximum power value can be divided into five operating gears with equal intervals, and the operating powers corresponding to the five operating gears are 1 / 5P, 2 / 5P, 3 / 5P, 4 / 5P and P. In this way, a reasonable arrangement of the operating gears can be achieved, which is conducive to improving the heating effect of the air conditioner 100.

[0065] Of course, the present invention is not limited to this, and the maximum power value can also be divided into multiple operating gears at unequal intervals. For example, the maximum power value can be divided into five operating gears. When the maximum power value of the electric heating element 3 is 15KW, the operating powers corresponding to the five operating gears are 1KW, 3KW, 5KW, 10KW and 15KW, respectively. In this way, different working conditions can be handled more flexibly.

[0066] In some embodiments of the present invention, the air conditioner 100 includes a debugging phase. During the debugging phase, when the electric heating element 3 is controlled to operate at an operating gear, the operating gear is increased by one level at every set time interval; during the debugging phase, the temperature of the indoor unit coil, the ambient temperature, and the maximum power value of the electric heating element 3 are obtained to select the operating gear.

[0067] That is to say, when the electric heating element 3 is initially started, the control module 1 can select the operating gear according to the temperature of the indoor unit coil, the ambient temperature, and the maximum power value of the electric heating element 3. When the operating gear is determined, the air conditioner 100 can enter the debugging stage. In the debugging stage, when the control module 1 controls the electric heating element 3 to operate at the operating gear, the operating gear is raised by one level at each set time interval until the electric heating element 3 operates at the selected operating gear, and the air conditioner 100 exits the debugging stage; in the debugging stage, the temperature of the indoor unit coil, the ambient temperature, and the maximum power value of the electric heating element 3 can be continuously obtained to select the operating gear in real time.

[0068] Exemplarily, the operating gear includes a first operating gear, a second operating gear, a third operating gear, a fourth operating gear and a fifth operating gear with gradually increasing operating power values. When the operating gear is selected as the third operating gear, the air conditioner 100 enters the debugging stage, the controller controls the electric heating element 3 to operate at the first operating gear, after a set time interval, the electric heating element 3 is adjusted to the second operating gear, and after another set time interval, the electric heating element 3 is adjusted to the third operating gear, and the air conditioner 100 exits the debugging stage and operates stably; in the process of the electric heating element 3 switching from the first operating gear to the third operating gear, if the operating gear is re-selected as the fifth operating gear, the electric heating element 3 can be correspondingly controlled to adjust to the fifth operating gear, and after reaching the fifth operating stage, the air conditioner 100 exits the debugging stage and operates stably; and so on, which will not be repeated here. In this way, the impact caused by the electric heating element 3 during the startup process can be reduced, which is conducive to improving the operating stability of the air conditioner 100.

[0069] In some embodiments of the present invention, the setting time can be in the range of 5s-20s, for example, the setting time can be 5s, 8s, 10s, 12s, 15s, 18s, 20s, etc. Thus, the electric heating element 3 can have sufficient buffer time, and the heating efficiency of the air conditioner 100 can be guaranteed to a certain extent, which is conducive to improving the comfort of the user.

[0070] The present invention also provides an air conditioner 100 .

[0071] like Fig. 9 As shown, according to the air conditioner 100 of an embodiment of the present invention, the air conditioner 100 is applicable to the control method of any of the above embodiments, and the air conditioner 100 includes: a detection module 2 and a control module 1, the detection module 2 is used to detect the temperature of the indoor unit coil and the ambient temperature, and obtain the maximum power value of the electric heating element 3; the control module 1 is used to obtain the target power value according to the temperature of the indoor unit coil, the temperature difference between the temperature of the indoor unit coil and the ambient temperature, and select the operating gear of the electric heating element 3 according to the target power value and the maximum power value.

[0072] According to the air conditioner 100 of the embodiment of the present invention, the power of the electric heating element 3 can be adjusted during the heating process, which is beneficial to reducing the loss of the air conditioner 100 and can make the air outlet temperature of the air conditioner 100 more stable, which is beneficial to improving the user's comfort.

[0073] In some embodiments of the present invention, the control module 1 includes: a plurality of relays 11, and the plurality of relays 11 are used to control the operating gear of the electric heating element 3 step by step.

[0074] For example, refer to Fig.10 As shown, the control module 1 is electrically connected to the external power supply 200, and the control module 1 includes a plurality of relays 11, and the plurality of relays 11 are selectively electrically connected to the electric heating element 3, respectively. The operating gear of the electric heating element 3 can be adjusted by adjusting the number of relays 11 electrically connected to the electric heating element 3.

[0075] For example, the relays 11 can be set to five, and the operating gears include the first operating gear, the second operating gear, the third operating gear, the fourth operating gear, and the fifth operating gear with gradually increasing operating power values. When one relay 11 is electrically connected to the electric heating element 3, the electric heating element 3 operates at the first operating gear; when two relays 11 are electrically connected to the electric heating element 3, the electric heating element 3 operates at the second operating gear; and so on. In this way, the electric heating element 3 can be conveniently controlled to switch the operating gear, thereby improving the reliability of the air conditioner 100.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner comprises an indoor unit coil and an electric heating element, and the control method comprises: Detecting the temperature of the indoor unit coil and the indoor ambient temperature; Acquire a target power value according to the temperature of the indoor unit coil, the temperature difference between the temperature of the indoor unit coil and the ambient temperature; The maximum power value of the electric heating element is obtained, and the operating gear of the electric heating element is selected according to the target power value and the maximum power value.

2. The air conditioner control method according to claim 1, characterized in that: The acquiring the target power value according to the temperature of the indoor unit coil, the temperature difference between the temperature of the indoor unit coil and the ambient temperature includes: obtaining a preliminary power value according to the temperature of the indoor unit coil; Obtaining a supplementary coefficient according to a temperature difference between the temperature of the indoor unit coil and the ambient temperature; The preliminary power value is multiplied by the supplement coefficient to obtain a target power value.

3. The air conditioner control method according to claim 2, characterized in that: The temperature of the indoor unit coil is divided into a plurality of temperature intervals, and each of the temperature intervals has a corresponding preliminary power value.

4. The air conditioner control method according to claim 2, characterized in that: The temperature difference between the temperature of the indoor unit coil and the ambient temperature has a plurality of temperature difference intervals, and each of the temperature difference intervals has a corresponding supplementary coefficient.

5. The air conditioner control method according to claim 1, characterized in that: The obtaining of the maximum power value of the electric heating element comprises: Obtaining the actual voltage of the electric heating element; The maximum power value of the electric heating element is obtained according to the actual voltage.

6. The air conditioner control method according to claim 1, characterized in that: The step of selecting the operating gear of the electric heating element according to the target power value and the maximum power value comprises: Dividing a plurality of operating gears according to the maximum power value; Selecting the operating gear having an operating power value close to the target power value; When the target power value is between the operating power values ​​corresponding to two operating gears, the operating gear corresponding to the larger operating power value is selected.

7. The air conditioner control method according to claim 6, characterized in that: The maximum power value is divided into a plurality of operating gears at equal intervals.

8. The air conditioner control method according to claim 1, characterized in that: The air conditioner includes a debugging stage, in which the electric heating element is controlled to operate at the operating gear, and the operating gear is raised by one level at each set time interval; During the debugging stage, the temperature of the indoor unit coil, the ambient temperature, and the maximum power value of the electric heating element are obtained to select the operating gear.

9. The air conditioner control method according to claim 8, characterized in that: The setting time ranges from 5s to 20s.

10. An air conditioner (100), characterized in that: The air conditioner (100) is applicable to the control method according to any one of claims 1 to 9, and the air conditioner (100) comprises: A detection module (2), the detection module (2) being used to detect the temperature of the indoor unit coil and the ambient temperature, and to obtain the maximum power value of the electric heating element; A control module (1), the control module (1) is used to obtain a target power value based on the temperature of the indoor unit coil, the temperature difference between the indoor unit coil and the ambient temperature, and to select an operating gear of the electric heating element based on the target power value and the maximum power value.

11. The air conditioner (100) according to claim 10, characterized in that: The control module (1) comprises: a plurality of relays (11), and the plurality of relays (11) are used to control the operating gear position of the electric heating element step by step.

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