Control Method, Device and Air Conditioner of Air Conditioner

Abstract

The present invention provides a control method, device and air conditioner for an air conditioner. The method includes: in response to a heating signal, acquiring the temperature characteristics of a heat exchanger and a preset defrosting temperature; generating an adjustment strategy based on the temperature characteristics and the preset defrosting temperature; and adjusting the instant rotation speed of a blower according to the adjustment strategy. By acquiring the temperature characteristics of the heat exchanger and the preset defrosting temperature, determining the adjustment scheme of an outdoor blower according to the temperature characteristics of the heat exchanger and the preset defrosting temperature, and then adjusting the rotation speed of the outdoor blower, the present invention can effectively extend the heating cycle, reduce the defrosting times, thereby improving the indoor heating effect and enhancing the user experience.

Description

Technical Field

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

[0002] With the continuous development of technology, using air conditioner heating for heating in cold seasons has become a relatively common heating method. However, in the case of low outdoor temperature, when the air conditioner operates in the heating mode, frosting will occur on the outdoor unit. When the frosting is severe, the heating effect will be reduced. Therefore, how to effectively defrost has become an important problem for using air conditioner heating in cold seasons. Summary of the Invention

[0003] The present invention provides a control method, device and air conditioner for an air conditioner, so as to solve the problem that the frosting of the outdoor unit leads to a decrease in heating efficiency when the air conditioner heats in cold seasons in the prior art.

[0004] According to a control method for an air conditioner provided by the first aspect of the present invention, the air conditioner includes: an outdoor unit and an indoor unit, the outdoor unit and the indoor unit are connected to form a refrigerant circulation loop, the outdoor unit includes a heat exchanger disposed on the refrigerant circulation loop, and a blower corresponding to the heat exchanger;

[0005] The method includes:

[0006] In response to a heating signal, obtain the temperature characteristic of the heat exchanger and a preset defrosting temperature;

[0007] Generate an adjustment strategy according to the temperature characteristic and the preset defrosting temperature;

[0008] Adjust the instant rotation speed of the blower according to the adjustment strategy.

[0009] According to an embodiment of the present invention, in the step of obtaining the temperature characteristic of the heat exchanger, it specifically includes:

[0010] Obtain the first instant refrigerant temperature of the refrigerant in the heat exchanger and the ambient temperature of the outdoor where the outdoor unit is located;

[0011] Generate the temperature characteristic according to the first instant refrigerant temperature and the ambient temperature.

[0012] Specifically, this embodiment provides an implementation manner for obtaining the temperature characteristic of the heat exchanger.

[0013] According to an embodiment of the present invention, in the step of generating the temperature characteristic according to the first instant refrigerant temperature and the ambient temperature, it specifically includes:

[0014] Obtain the heat transfer coefficient between the heat exchanger and the outdoors per unit time;

[0015] Determine the instantaneous heat transfer rate of the heat exchanger according to the heat transfer coefficient, the first instantaneous refrigerant temperature and the ambient temperature;

[0016] Generate the temperature feature according to the instantaneous heat transfer rate.

[0017] Specifically, this embodiment provides an implementation manner of generating the temperature feature according to the first instantaneous refrigerant temperature and the ambient temperature.

[0018] According to an implementation manner of the present invention, in the step of obtaining the temperature feature of the heat exchanger, it specifically further includes:

[0019] Obtain the refrigerant flow parameter of the refrigerant passing through the heat exchanger within the acquisition time period;

[0020] Obtain the operating mode of the air conditioner;

[0021] Generate a refrigerant flow prediction function according to the refrigerant flow parameter and the operating mode, and the refrigerant flow prediction function identifies the predicted refrigerant flow passing through the heat exchanger within the acquisition time period;

[0022] Generate the temperature feature according to the first instantaneous refrigerant temperature, the ambient temperature and the refrigerant flow prediction function.

[0023] Specifically, this embodiment provides an implementation manner of obtaining the temperature feature of the heat exchanger.

[0024] According to an implementation manner of the present invention, in the step of generating an adjustment strategy according to the temperature feature and the preset defrosting temperature, it specifically includes:

[0025] Determine the target speed of the blower according to the temperature feature and the preset defrosting temperature;

[0026] Generate the adjustment strategy according to the target speed.

[0027] Specifically, this embodiment provides an implementation manner of generating an adjustment strategy according to the temperature feature and the preset defrosting temperature.

[0028] According to an implementation manner of the present invention, in the step of determining the target speed of the blower according to the temperature feature and the preset defrosting temperature, it specifically further includes:

[0029] Determine a control interval according to the temperature feature and the preset defrosting temperature, and a first preset speed is set within each control interval;

[0030] Generate the target speed according to the first preset speed.

[0031] Specifically, this embodiment provides an implementation manner for determining the target speed of the blower according to the temperature characteristic and the preset defrosting temperature.

[0032] According to an implementation manner of the present invention, in the step of adjusting the instant speed of the blower according to the adjustment strategy, it specifically includes:

[0033] Obtain the second instant refrigerant temperature of the refrigerant in the heat exchanger and make a judgment;

[0034] Determine that the second instant refrigerant temperature rises to a preset temperature threshold, then the blower is adjusted from the instant speed to a second preset speed, and the second preset speed is the speed of the blower in the corresponding operating mode of the air conditioner;

[0035] Determine that the second instant refrigerant temperature does not rise to the preset temperature threshold within a preset adjustment period, then the blower is adjusted from the instant speed to the maximum speed.

[0036] Specifically, this embodiment provides an implementation manner for adjusting the instant speed of the blower according to the adjustment strategy.

[0037] According to an implementation manner of the present invention, in the step of adjusting the instant speed of the blower according to the adjustment strategy, it specifically includes:

[0038] Obtain the second instant refrigerant temperature of the refrigerant in the heat exchanger and make a judgment;

[0039] Determine that the rising amplitude of the second instant refrigerant temperature reaches a preset rising amplitude within a preset adjustment period, then the blower is adjusted from the instant speed to a second preset speed, and the second preset speed is the speed of the blower in the corresponding operating mode of the air conditioner;

[0040] Determine that the rising amplitude of the second instant refrigerant temperature does not reach the preset rising amplitude within a preset adjustment period, then the blower is adjusted from the instant speed to the maximum speed.

[0041] Specifically, this embodiment provides an implementation manner for adjusting the instant speed of the blower according to the adjustment strategy.

[0042] According to a control device of an air conditioner provided in the second aspect of the present invention, it includes: an acquisition module, a generation module, and an execution module;

[0043] The acquisition module is used to obtain the temperature characteristic and the preset defrosting temperature of the heat exchanger in response to a heating signal;

[0044] The generating module is configured to generate an adjustment strategy according to the temperature feature and the preset defrosting temperature;

[0045] The executing module is configured to adjust the instant rotation speed of the blower according to the adjustment strategy.

[0046] An air conditioner provided according to the third aspect of the present invention includes the control method of the above-mentioned air conditioner or the control device of the above-mentioned air conditioner.

[0047] One or more of the above technical solutions in the present invention have at least one of the following technical effects: A control method, device and air conditioner provided by the present invention can effectively extend the heating cycle and reduce the number of defrosts by obtaining the temperature feature of the heat exchanger and the preset defrosting temperature, determining the adjustment scheme of the outdoor blower according to the temperature feature of the heat exchanger and the preset defrosting temperature, and then adjusting the rotation speed of the outdoor blower, thereby improving the indoor heating effect and increasing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 is a schematic layout diagram of the air conditioner provided by the present invention;

[0050] Figure 2 is a schematic flowchart of the control method of the air conditioner provided by the present invention;

[0051] Figure 3 is a schematic structural diagram of the control device of the air conditioner provided by the present invention.

[0052] Reference Signs:

[0053] 10, outdoor unit; 11, heat exchanger; 12, blower; 20, indoor unit; 30, refrigerant circulation circuit; 40, acquisition module; 50, generation module; 60, execution module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of 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 thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0056] The present invention will be specifically described below in conjunction with the specific implementation manners.

[0057] In some specific implementation schemes of the present invention, as Figure 1 and Figure 2 shown, the present solution provides a control method for an air conditioner, where the air conditioner includes: an outdoor unit 10 and an indoor unit 20. The outdoor unit 10 and the indoor unit 20 are connected to form a refrigerant circulation loop 30. The outdoor unit 10 includes a heat exchanger 11 disposed on the refrigerant circulation loop 30, and a fan 12 corresponding to the heat exchanger 11;

[0058] The method includes:

[0059] In response to a heating signal, obtain the temperature characteristic of the heat exchanger 11 and a preset defrosting temperature;

[0060] Generate an adjustment strategy according to the temperature characteristic and the preset defrosting temperature;

[0061] Adjust the instant rotation speed of the fan 12 according to the adjustment strategy.

[0062] It should be noted that during the heating season when the air conditioner operates in heating mode, the existing outdoor heat exchanger 11 needs to absorb heat from the outdoor environment (low-temperature heat source), and its surface temperature is generally relatively low (below 0°C). Therefore, during operation, water vapor in the air condenses on the surface of the heat exchanger 11 to form frost. The frosting of the outdoor heat exchanger 11 further reduces the heat exchange effect, the temperature of the outdoor heat exchanger 11 decreases, and the frosting becomes more serious, resulting in a vicious cycle.

[0063] Therefore, when the system detects that the outdoor heat exchanger 11 is frosted to a certain extent, defrosting will be carried out. In the same refrigeration mode, the outdoor is defrosted through the refrigerant. After the defrosting is completed, heating is carried out. However, during the defrosting process, the indoor heat exchange temperature is low, and generally the indoor fan 12 stops. Therefore, during the defrosting process, the indoor does not heat, which will cause temperature fluctuations.

[0064] Based on the defects or problems existing in the above-mentioned prior art, the present invention obtains the temperature characteristics of the heat exchanger 11 in the outdoor unit 10, and determines the adjustment strategy for adjusting the rotation speed of the fan 12 according to the preset defrosting temperature, so as to increase the air volume sent into the heat exchanger 11 before the heat exchanger 11 in the outdoor unit 10 is frosted, so that the heat exchanger 11 can obtain more heat, avoid the phenomenon that the surface of the heat exchanger 11 is frosted due to insufficient heat acquisition, which is equivalent to extending the heating cycle, achieving the effect of pre-defrosting, reducing the number of defrosting times, and improving the heating effect of the heating indoor unit 20.

[0065] In some possible embodiments of the present invention, in the step of obtaining the temperature characteristics of the heat exchanger 11, it specifically includes:

[0066] Obtain the first instantaneous refrigerant temperature of the refrigerant in the heat exchanger 11 and the ambient temperature of the outdoor where the outdoor unit 10 is located;

[0067] Generate temperature characteristics according to the first instantaneous refrigerant temperature and the ambient temperature.

[0068] Specifically, this embodiment provides an implementation manner for obtaining the temperature characteristics of the heat exchanger 11, obtaining the temperature of the heat exchanger 11 in the outdoor unit 10 and generating the first instantaneous refrigerant temperature, obtaining the ambient temperature of the outdoor environment where the outdoor unit 10 is located, and determining the temperature characteristics of the heat exchanger 11 according to the first instantaneous refrigerant temperature and the ambient temperature, realizing determining the magnitude of the air volume that needs to be input into the heat exchanger 11 according to the two characteristic values of the first instantaneous refrigerant temperature and the ambient temperature, and realizing the input of different magnitudes of air volume by adjusting the instantaneous rotation speed of the fan 12.

[0069] In some possible embodiments of the present invention, in the step of generating temperature characteristics according to the first instantaneous refrigerant temperature and the ambient temperature, it specifically includes:

[0070] Obtain the heat transfer coefficient of heat exchange between the heat exchanger 11 and the outdoor in unit time;

[0071] Determine the instantaneous heat transfer rate of the heat exchanger 11 according to the heat transfer coefficient, the first instantaneous refrigerant temperature and the ambient temperature;

[0072] Generate temperature characteristics according to the instantaneous heat transfer rate.

[0073] Specifically, this embodiment provides an implementation manner of generating a temperature feature based on the first instant refrigerant temperature and the ambient temperature. By determining the heat transfer coefficient of the heat exchanger 11 for heat exchange with the outdoor environment, the instant heat transfer rate between the heat exchanger 11 and the outdoor environment per unit time can be clarified, and then the rotation speed of the blower 12 can be adjusted more precisely.

[0074] It should be noted that different outdoor temperatures and different refrigerant temperatures in the heat exchanger 11 will result in an uncertain heat transfer coefficient. Therefore, by obtaining the heat transfer coefficient, the magnitude of heat exchange between the heat exchanger 11 and the outdoor environment per unit time can be clarified, and then the air supply volume of the blower 12, that is, the heat input into the heat exchanger 11 per unit time, can be determined.

[0075] It can be understood that increasing the heat blown to the coil of the heat exchanger 11 per unit time can increase the heat flowing through the coil of the heat exchanger 11. When increasing the heat blown to the coil of the heat exchanger 11 per unit time, the temperature of the coil of the heat exchanger 11 can be kept stable or increased, the coil of the heat exchanger 11 is not easily frosted, the defrosting cycle of the heat exchanger 11 in the heating mode is extended, the fluctuation of the indoor temperature is small, and the comfort of the user is improved.

[0076] In a possible implementation manner, the temperature of the heat exchanger 11 is set to multiple gradient values, and the temperature of the heat exchanger 11 is obtained in real time. When it is determined that the temperature of the heat exchanger 11 is within the corresponding gradient value, the heat transfer coefficient of the heat exchanger 11 for heat exchange with the outdoor is obtained again, so as to ensure that the adjustment of the rotation speed of the blower 12 can meet the heat transfer rate of the heat exchanger 11, ensure the stability of the heat blown to the coil of the heat exchanger 11 per unit time, and at the same time, the energy exchanged between the heat exchanger 11 and the outdoor can also be kept stable, ensure that the amplitude of the indoor temperature fluctuation meets the corresponding set requirements, and improve the comfort of the user.

[0077] In some possible embodiments of the present invention, in the step of obtaining the temperature feature of the heat exchanger 11, it specifically further includes:

[0078] Obtaining the refrigerant flow parameter of the refrigerant passing through the heat exchanger 11 within the acquisition time period;

[0079] Obtaining the operating mode of the air conditioner;

[0080] Generating a refrigerant flow prediction function according to the refrigerant flow parameter and the operating mode, and the refrigerant flow prediction function identifies the predicted refrigerant flow passing through the heat exchanger 11 within the acquisition time period;

[0081] Generating a temperature feature according to the first instant refrigerant temperature, the ambient temperature, and the refrigerant flow prediction function.

[0082] Specifically, this embodiment provides an implementation method for obtaining the temperature characteristics of the heat exchanger 11. By obtaining the refrigerant flow parameters of the heat exchanger 11 within the acquisition time period and combining with the operating mode of the air conditioner, the estimated refrigerant flow rate flowing into the heat exchanger 11 is predicted. Furthermore, according to the estimated refrigerant flow rate, the magnitude of the heat transferred by the blower 12 to the heat exchanger 11 is determined more accurately, ensuring the pre-defrosting effect of the heat exchanger 11.

[0083] In a possible implementation, different operating modes of the air conditioner will cause different magnitudes of refrigerant to enter the heat exchanger 11 in the outdoor unit 10. Furthermore, different magnitudes of refrigerant will cause changes in the heat transfer coefficient, heat transfer amount, etc. of the heat exchanger 11. Therefore, by obtaining the operating mode of the air conditioner, it is possible to predict the refrigerant flowing into the heat exchanger 11 in the outdoor unit 10, and then achieve precise control of the rotational speed of the blower 12. The operating mode of the air conditioner can be different heating levels or different working modes combined with, for example, sleep, purification, environmental protection, etc.

[0084] In a possible implementation, different operating modes of the air conditioner will also cause changes in the opening degree of the electronic expansion valve. Different opening degrees of the electronic expansion valve will result in different refrigerant flow rates entering the heat exchanger 11 in the outdoor unit 10.

[0085] In some possible embodiments of the present invention, in the step of generating an adjustment strategy based on the temperature characteristics and the preset defrosting temperature, it specifically includes:

[0086] Determining the target rotational speed of the blower 12 according to the temperature characteristics and the preset defrosting temperature;

[0087] Generating an adjustment strategy according to the target rotational speed.

[0088] Specifically, this embodiment provides an implementation method for generating an adjustment strategy based on the temperature characteristics and the preset defrosting temperature. By determining the target rotational speed of the blower 12 according to the temperature characteristics and the preset defrosting temperature, the control of the blower 12 becomes more intuitive, facilitating the determination of whether the heat transferred by the blower 12 to the heat exchanger 11 at this time can meet the pre-defrosting requirements of the heat exchanger 11.

[0089] In some possible embodiments of the present invention, in the step of determining the target rotational speed of the blower 12 according to the temperature characteristics and the preset defrosting temperature, it specifically further includes:

[0090] Determining a control interval according to the temperature characteristics and the preset defrosting temperature, and a first preset rotational speed is set within each control interval;

[0091] Generating the target rotational speed according to the first preset rotational speed.

[0092] Specifically, this embodiment provides an implementation manner for determining the target speed of the blower 12 according to the temperature characteristics and the preset defrosting temperature. A plurality of control intervals are preset, and the corresponding speeds of the blower 12 are set within each control interval. After determining the corresponding control interval through the temperature characteristics and the preset defrosting temperature, directly retrieve the first preset speed of the corresponding blower 12, and generate the target speed of the blower 12 according to the first preset speed.

[0093] In a possible implementation manner, it is determined that the temperature value of the heat exchanger 11 is greater than zero and within the first temperature interval, the first preset speed is obtained, and the first target speed for adjusting the speed of the blower 12 is generated according to the first preset speed;

[0094] It is determined that the temperature value of the heat exchanger 11 is greater than zero and within the second temperature interval, the corresponding first preset speed is obtained, and the second target speed for adjusting the speed of the blower 12 is generated according to the corresponding first preset speed;

[0095] It is determined that the temperature value of the heat exchanger 11 is greater than zero and within the third temperature interval, then the speed of the blower 12 is adjusted to the maximum speed;

[0096] Among them, the temperature values of the first temperature interval, the second temperature interval, and the third temperature interval decrease in sequence.

[0097] In an application scenario, the temperature of the heat exchanger 11 is 10°C, and the speed of the blower 12 is increased from 820 r / min to 850 r / min;

[0098] The temperature of the heat exchanger 11 is 8°C, and the speed of the blower 12 is increased from 850 r / min to 900 r / min;

[0099] The temperature of the heat exchanger 11 is 5°C, and the speed of the blower 12 is increased from 900 r / min to 1100 r / min.

[0100] In some possible embodiments of the present invention, in the step of adjusting the instant speed of the blower 12 according to the adjustment strategy, it specifically includes:

[0101] Obtain the second instant refrigerant temperature of the refrigerant in the heat exchanger 11 and make a judgment;

[0102] It is determined that the second instant refrigerant temperature rises to the preset temperature threshold, then the blower 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is the speed of the blower 12 in the corresponding operating mode of the air conditioner;

[0103] It is determined that the second instant refrigerant temperature does not rise to the preset temperature threshold within the preset adjustment period, then the blower 12 is adjusted from the instant speed to the maximum speed.

[0104] Specifically, this embodiment provides an implementation manner of adjusting the instant rotation speed of the blower 12 according to an adjustment strategy. After adjusting the rotation speed of the blower 12, by judging the second instant refrigerant temperature of the refrigerant in the heat exchanger 11, according to the corresponding change of the second instant refrigerant temperature, a rapid response adjustment is made to the rotation speed of the blower 12 to ensure the pre-defrosting effect of the heat exchanger 11, and to avoid the problem that the pre-defrosting of the heat exchanger 11 fails to reach the preset effect, which may lead to frosting on the surface of the heat exchanger 11 and further affect the efficiency of the heat exchanger 11.

[0105] In a possible implementation manner, if it is determined that the second instant refrigerant temperature rises to a preset temperature threshold, the rotation speed of the blower 12 is adjusted from the instant rotation speed to a second preset rotation speed, and the second preset rotation speed is the rotation speed in the current operating mode of the air conditioner, so as to ensure the indoor heating effect, avoid large temperature fluctuations, and reduce energy consumption at the same time.

[0106] In a possible implementation manner, if it is determined that the second instant refrigerant temperature does not rise to the preset temperature threshold within a preset adjustment period, after the blower 12 is adjusted from the instant rotation speed to the maximum rotation speed, the following steps are further included: sending a corresponding prompt message to the user, and the prompt message indicates that there is a frosting risk for the heat exchanger 11, and maintenance or manual defrosting or checking the operating status of the corresponding equipment is required.

[0107] In some possible embodiments of the present invention, in the step of adjusting the instant rotation speed of the blower 12 according to the adjustment strategy, it specifically includes:

[0108] Obtaining and judging the second instant refrigerant temperature of the refrigerant in the heat exchanger 11;

[0109] If it is determined that the temperature rise amplitude of the second instant refrigerant temperature within a preset adjustment period reaches a preset temperature rise amplitude, the blower 12 is adjusted from the instant rotation speed to a second preset rotation speed, and the second preset rotation speed is the rotation speed of the blower 12 in the corresponding operating mode of the air conditioner;

[0110] If it is determined that the temperature rise amplitude of the second instant refrigerant temperature within a preset adjustment period does not reach the preset temperature rise amplitude, the blower 12 is adjusted from the instant rotation speed to the maximum rotation speed.

[0111] Specifically, this embodiment provides an implementation manner of adjusting the instant rotation speed of the blower 12 according to an adjustment strategy. After adjusting the rotation speed of the blower 12, by judging the second instant refrigerant temperature of the refrigerant in the heat exchanger 11, according to the corresponding change of the second instant refrigerant temperature, a rapid response adjustment is made to the rotation speed of the blower 12 to ensure the pre-defrosting effect of the heat exchanger 11, and to avoid the problem that the pre-defrosting of the heat exchanger 11 fails to reach the preset effect, which may lead to frosting on the surface of the heat exchanger 11 and further affect the efficiency of the heat exchanger 11.

[0112] In a possible implementation, after the temperature rise of the second instant refrigerant within the preset adjustment period reaches the preset temperature rise, it indicates that the heat delivered by the blower 12 to the heat exchanger 11 at this time can meet the requirements of pre-defrosting. Therefore, the rotational speed of the blower 12 is adjusted from the instant rotational speed to the second preset rotational speed, and the second preset rotational speed is the rotational speed in the current operating mode of the air conditioner, ensuring the indoor heating effect, avoiding large temperature fluctuations, and reducing energy consumption at the same time.

[0113] In a possible implementation, if it is determined that the temperature rise of the second instant refrigerant within the preset adjustment period does not reach the preset temperature rise, after the step of adjusting the blower 12 from the instant rotational speed to the maximum rotational speed, it further includes: sending a corresponding prompt message to the user, and the prompt message indicates that there is a risk of frosting on the heat exchanger 11, and maintenance or manual defrosting or checking the operating status of the corresponding equipment is required.

[0114] In some specific implementation manners of the present invention, as Figure 3 shown, the present solution provides a control device for an air conditioner, including: an acquisition module 40, a generation module 50, and an execution module 60;

[0115] The acquisition module 40 is configured to acquire the temperature characteristics of the heat exchanger 11 and the preset defrosting temperature in response to a heating signal;

[0116] The generation module 50 is configured to generate an adjustment strategy according to the temperature characteristics and the preset defrosting temperature;

[0117] The execution module 60 is configured to adjust the instant rotational speed of the blower 12 according to the adjustment strategy.

[0118] Optionally, in the step of acquiring the temperature characteristics of the heat exchanger 11, it specifically includes:

[0119] acquiring the first instant refrigerant temperature in the heat exchanger 11 and the ambient temperature outside the outdoor unit 10;

[0120] generating temperature characteristics according to the first instant refrigerant temperature and the ambient temperature.

[0121] Specifically, this embodiment provides an implementation manner of acquiring the temperature characteristics of the heat exchanger 11.

[0122] Optionally, in the step of generating temperature characteristics according to the first instant refrigerant temperature and the ambient temperature, it specifically includes:

[0123] acquiring the heat transfer coefficient of heat exchange between the heat exchanger 11 and the outside in unit time;

[0124] determining the instant heat transfer rate of the heat exchanger 11 according to the heat transfer coefficient, the first instant refrigerant temperature, and the ambient temperature;

[0125] generating temperature characteristics according to the instant heat transfer rate.

[0126] Specifically, this embodiment provides an implementation manner of generating a temperature feature according to the first instant refrigerant temperature and the ambient temperature.

[0127] Optionally, in the step of obtaining the temperature feature of the heat exchanger 11, it further specifically includes:

[0128] Obtain the refrigerant flow rate parameter of the refrigerant passing through the heat exchanger 11 within the acquisition time period;

[0129] Obtain the operating mode of the air conditioner;

[0130] Generate a refrigerant flow rate prediction function according to the refrigerant flow rate parameter and the operating mode, and the refrigerant flow rate prediction function identifies the predicted refrigerant flow rate passing through the heat exchanger 11 within the acquisition time period;

[0131] Generate a temperature feature according to the first instant refrigerant temperature, the ambient temperature, and the refrigerant flow rate prediction function.

[0132] Specifically, this embodiment provides an implementation manner of obtaining the temperature feature of the heat exchanger 11.

[0133] Optionally, in the step of generating an adjustment strategy according to the temperature feature and the preset defrosting temperature, it specifically includes:

[0134] Determine the target rotation speed of the blower 12 according to the temperature feature and the preset defrosting temperature;

[0135] Generate an adjustment strategy according to the target rotation speed.

[0136] Specifically, this embodiment provides an implementation manner of generating an adjustment strategy according to the temperature feature and the preset defrosting temperature.

[0137] Optionally, in the step of determining the target rotation speed of the blower 12 according to the temperature feature and the preset defrosting temperature, it further specifically includes:

[0138] Determine a control interval according to the temperature feature and the preset defrosting temperature, and a first preset rotation speed is set in each control interval;

[0139] Generate a target rotation speed according to the first preset rotation speed.

[0140] Specifically, this embodiment provides an implementation manner of determining the target rotation speed of the blower 12 according to the temperature feature and the preset defrosting temperature.

[0141] Optionally, in the step of adjusting the instant rotation speed of the blower 12 according to the adjustment strategy, it specifically includes:

[0142] Obtain the second instant refrigerant temperature of the refrigerant in the heat exchanger 11 and make a judgment;

[0143] If it is determined that the second instant refrigerant temperature has risen to the preset temperature threshold, the blower 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is the speed of the blower 12 in the corresponding operating mode of the air conditioner;

[0144] If it is determined that the second instant refrigerant temperature has not risen to the preset temperature threshold within the preset adjustment period, the blower 12 is adjusted from the instant speed to the maximum speed.

[0145] Specifically, this embodiment provides an implementation manner of adjusting the instant speed of the blower 12 according to the adjustment strategy.

[0146] Optionally, in the step of adjusting the instant speed of the blower 12 according to the adjustment strategy, it specifically includes:

[0147] Obtain the second instant refrigerant temperature of the refrigerant in the heat exchanger 11 and make a judgment;

[0148] If it is determined that the temperature rise amplitude of the second instant refrigerant temperature within the preset adjustment period reaches the preset temperature rise amplitude, the blower 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is the speed of the blower 12 in the corresponding operating mode of the air conditioner;

[0149] If it is determined that the temperature rise amplitude of the second instant refrigerant temperature within the preset adjustment period does not reach the preset temperature rise amplitude, the blower 12 is adjusted from the instant speed to the maximum speed.

[0150] Specifically, this embodiment provides an implementation manner of adjusting the instant speed of the blower 12 according to the adjustment strategy.

[0151] In some specific implementation schemes of the present invention, the present solution provides an air conditioner, including the control method of the above-mentioned air conditioner or the control device of the above-mentioned air conditioner.

[0152] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0153] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "mode", "specific mode", or "some modes", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or mode are included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or modes. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered by the scope of the claims of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes: an outdoor unit (10) and an indoor unit (20). The outdoor unit (10) and the indoor unit (20) are connected to form a refrigerant circulation circuit (30). The outdoor unit (10) includes a heat exchanger (11) disposed on the refrigerant circulation circuit (30), and a fan (12) corresponding to the heat exchanger (11); The method includes: In response to a heating signal, obtaining the temperature characteristic of the heat exchanger (11) and a preset defrosting temperature; Generating an adjustment strategy based on the temperature characteristic and the preset defrosting temperature; Adjusting the instantaneous rotational speed of the fan (12) according to the adjustment strategy; In the step of obtaining the temperature characteristic of the heat exchanger (11), it specifically includes: Obtaining the first instantaneous refrigerant temperature of the refrigerant in the heat exchanger (11), and the ambient temperature of the outdoors where the outdoor unit (10) is located; Generating the temperature characteristic based on the first instantaneous refrigerant temperature and the ambient temperature; In the step of generating the temperature characteristic based on the first instantaneous refrigerant temperature and the ambient temperature, it specifically includes: Obtaining the heat transfer coefficient of heat exchange between the heat exchanger (11) and the outdoors within a unit time, setting the temperature of the heat exchanger (11) to multiple gradient values, and obtaining the temperature of the heat exchanger (11) in real time. When it is determined that the temperature of the heat exchanger (11) is within the corresponding gradient value, obtaining the heat transfer coefficient of heat exchange between the heat exchanger (11) and the outdoors again; Determining the instantaneous heat transfer rate of the heat exchanger (11) based on the heat transfer coefficient, the first instantaneous refrigerant temperature, and the ambient temperature; Generating the temperature characteristic based on the instantaneous heat transfer rate; 2. The control method for an air conditioner according to claim 1, characterized in that, In the step of generating an adjustment strategy based on the temperature characteristic and the preset defrosting temperature, it specifically includes: Determining the target rotational speed of the fan (12) based on the temperature characteristic and the preset defrosting temperature; Generating the adjustment strategy based on the target rotational speed; 3. The control method for an air conditioner according to claim 2, characterized in that, In the step of determining the target rotational speed of the fan (12) based on the temperature characteristic and the preset defrosting temperature, it specifically further includes: Determining a control interval based on the temperature characteristic and the preset defrosting temperature, and a first preset rotational speed is set within each control interval; Generating the target rotational speed based on the first preset rotational speed; 4. The control method for an air conditioner according to claim 2, characterized in that, In the step of adjusting the instantaneous rotational speed of the fan (12) according to the adjustment strategy, it specifically includes: Obtaining the second instantaneous refrigerant temperature of the refrigerant in the heat exchanger (11) and making a judgment; Determining that the second instantaneous refrigerant temperature rises to a preset temperature threshold, then the fan (12) is adjusted from the instantaneous rotational speed to a second preset rotational speed, and the second preset rotational speed is the rotational speed of the fan (12) in the corresponding operating mode of the air conditioner; Determining that the second instantaneous refrigerant temperature does not rise to the preset temperature threshold within a preset adjustment period, then the fan (12) is adjusted from the instantaneous rotational speed to the maximum rotational speed.

5. The control method for an air conditioner according to claim 2, characterized in that, In the step of adjusting the instantaneous rotational speed of the fan (12) according to the adjustment strategy, it specifically includes: Obtaining the second instantaneous refrigerant temperature of the refrigerant in the heat exchanger (11) and making a judgment; If it is determined that the temperature rise amplitude of the second instant refrigerant temperature within a preset adjustment period reaches a preset temperature rise amplitude, the blower (12) is adjusted from the instant speed to a second preset speed, and the second preset speed is the speed of the blower (12) in the corresponding operating mode of the air conditioner; If it is determined that the temperature rise amplitude of the second instant refrigerant temperature within a preset adjustment period does not reach the preset temperature rise amplitude, the blower (12) is adjusted from the instant speed to the maximum speed.

6. A control device for an air conditioner, characterized in that, The air conditioner includes: an outdoor unit (10) and an indoor unit (20), the outdoor unit (10) and the indoor unit (20) are connected to form a refrigerant circulation circuit (30), the outdoor unit (10) includes a heat exchanger (11) provided on the refrigerant circulation circuit (30), and a blower (12) corresponding to the heat exchanger (11); The device includes: an acquisition module (40), a generation module (50), and an execution module (60); The acquisition module (40) is configured to acquire the temperature characteristics of the heat exchanger (11) and a preset defrosting temperature in response to a heating signal; The generation module (50) is configured to generate an adjustment strategy according to the temperature characteristics and the preset defrosting temperature; The execution module (60) is configured to adjust the instant speed of the blower (12) according to the adjustment strategy; In the step of acquiring the temperature characteristics of the heat exchanger (11), it specifically includes: Acquiring the first instant refrigerant temperature of the refrigerant in the heat exchanger (11) and the ambient temperature of the outdoors where the outdoor unit (10) is located; Generating the temperature characteristics according to the first instant refrigerant temperature and the ambient temperature; In the step of generating the temperature characteristics according to the first instant refrigerant temperature and the ambient temperature, it specifically includes: Acquiring the heat transfer coefficient of heat exchange between the heat exchanger (11) and the outdoors per unit time, setting the temperature of the heat exchanger (11) to multiple gradient values, and acquiring the temperature of the heat exchanger (11) in real time. When it is determined that the temperature of the heat exchanger (11) is within the corresponding gradient value, acquiring the heat transfer coefficient of heat exchange between the heat exchanger (11) and the outdoors again; Determining the instant heat transfer rate of the heat exchanger (11) according to the heat transfer coefficient, the first instant refrigerant temperature, and the ambient temperature; Generating the temperature characteristics according to the instant heat transfer rate.

7. An air conditioner, characterized in that, Including the control method of the air conditioner according to any one of claims 1 to 5 above, or the control device of the air conditioner according to claim 6 above.

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