CN115654656A - Air conditioner control method, device and air conditioner - Google Patents

Abstract

The invention provides a control method and a control device of an air conditioner and the air conditioner, wherein the method comprises the following steps: responding to the heating signal, and acquiring the temperature characteristic of the heat exchanger and the preset defrosting temperature; generating an adjusting strategy according to the temperature characteristics and the preset defrosting temperature; and adjusting the instant rotating speed of the fan according to an adjusting strategy. According to the invention, the temperature characteristic of the heat exchanger and the preset defrosting temperature are obtained, the adjusting scheme of the outdoor fan is determined according to the temperature characteristic of the heat exchanger and the preset defrosting temperature, and then the rotating speed of the outdoor fan is adjusted, so that the heating period can be effectively prolonged, the defrosting times are reduced, the indoor heating effect is improved, and the user experience is increased.

Description

Air conditioner control method, device and air conditioner

technical field

The present invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device and the air conditioner.

Background technique

With the continuous development of science and technology, it has become a more common heating method to use air conditioners for heating in cold seasons. However, when the outdoor temperature is low, 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. The important issue of air conditioning heating.

Contents of the invention

The present invention provides an air conditioner control method, device and air conditioner, which are used to solve the problem in the prior art that when the air conditioner is heating in a cold season, the heating efficiency decreases due to frosting of an outdoor unit.

According to an air conditioner control method provided in the first aspect of the present invention, the air conditioner includes: an outdoor unit and an indoor unit, the outdoor unit communicates with the indoor unit to form a refrigerant circulation loop, and the outdoor unit includes a a heat exchanger on the refrigerant circuit, and a fan corresponding to the heat exchanger;

The methods include:

Obtaining a temperature characteristic and a preset defrosting temperature of the heat exchanger in response to a heating signal;

generating an adjustment strategy according to the temperature characteristics and the preset defrosting temperature;

The immediate rotational speed of the fan is adjusted according to the adjustment strategy.

According to an embodiment of the present invention, the step of obtaining the temperature characteristics of the heat exchanger specifically includes:

Obtaining the first instant refrigerant temperature of the refrigerant in the heat exchanger and the ambient temperature outside where the outdoor unit is located;

The temperature feature is generated according to the first instant refrigerant temperature and the ambient temperature.

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

According to an embodiment of the present invention, the step of generating the temperature feature according to the first instant refrigerant temperature and the ambient temperature specifically includes:

Obtain the heat transfer coefficient of the heat exchange between the heat exchanger and the outdoor in a unit time;

determining the instant heat exchange rate of the heat exchanger according to the heat exchange coefficient, the first instant refrigerant temperature and the ambient temperature;

The temperature signature is generated based on the instantaneous heat transfer rate.

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

According to an embodiment of the present invention, the step of acquiring the temperature characteristics of the heat exchanger specifically further includes:

Obtaining the refrigerant flow parameters passing through the refrigerant in the heat exchanger within the collection time period;

Obtain the operating mode of the air conditioner;

generating a refrigerant flow estimation function according to the refrigerant flow parameter and the operation mode, the refrigerant flow estimation function identifying the refrigerant estimated flow through the heat exchanger within the collection time period;

The temperature feature is generated according to the first instant refrigerant temperature, the ambient temperature and the refrigerant flow estimation function.

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

According to an embodiment of the present invention, the step of generating an adjustment strategy according to the temperature characteristics and the preset defrosting temperature specifically includes:

determining the target rotational speed of the fan according to the temperature characteristics and the preset defrosting temperature;

The regulation strategy is generated according to the target rotational speed.

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

According to an embodiment of the present invention, the step of determining the target speed of the fan according to the temperature characteristics and the preset defrosting temperature further includes:

A control interval is determined according to the temperature characteristics and the preset defrosting temperature, and a first preset rotation speed is set in each of the control intervals;

The target rotational speed is generated according to the first preset rotational speed.

Specifically, this embodiment provides an implementation manner of determining the target rotational speed of the fan according to the temperature characteristics and the preset defrosting temperature.

According to an embodiment of the present invention, the step of adjusting the immediate rotational speed of the fan according to the adjustment strategy specifically includes:

Obtaining the second instant refrigerant temperature of the refrigerant in the heat exchanger, and making a judgment;

If it is determined that the temperature of the second immediate refrigerant rises to a preset temperature threshold, then the fan is adjusted from the instant speed to a second preset speed, and the second preset speed is the corresponding temperature of the fan in the air conditioner. speed in operating mode;

If it is determined that the temperature of the second immediate refrigerant does not rise to a preset temperature threshold within a preset adjustment period, then the fan is adjusted from the instant speed to a maximum speed.

Specifically, this embodiment provides an implementation manner of adjusting the immediate rotational speed of the fan according to the adjustment strategy.

According to an embodiment of the present invention, the step of adjusting the immediate rotational speed of the fan according to the adjustment strategy specifically includes:

Obtaining the second instant refrigerant temperature of the refrigerant in the heat exchanger, and making a judgment;

If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment period reaches the preset temperature rise range, then the fan is adjusted from the instant speed to a second preset speed, and the second preset speed is the The speed of the fan in the corresponding operation mode of the air conditioner;

If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment period does not reach the preset temperature rise range, then the fan is adjusted from the instant speed to the maximum speed.

Specifically, this embodiment provides an implementation manner of adjusting the immediate rotational speed of the fan according to the adjustment strategy.

An air conditioner control device provided according to the second aspect of the present invention includes: an acquisition module, a generation module and an execution module;

The obtaining module is used to obtain the temperature characteristic and the preset defrosting temperature of the heat exchanger in response to the heating signal;

The generating module is used to generate an adjustment strategy according to the temperature characteristics and the preset defrosting temperature;

The execution module is used for adjusting the immediate rotational speed of the fan according to the adjustment strategy.

An air conditioner provided according to a third aspect of the present invention includes the above air conditioner control method, or the above air conditioner control device.

The above-mentioned one or more technical solutions in the present invention have at least one of the following technical effects: the control method and device for an air conditioner and the air conditioner provided in the present invention, by obtaining the temperature characteristics of the heat exchanger and preset defrosting Temperature, according to the temperature characteristics of the heat exchanger and the preset defrosting temperature to determine the adjustment scheme of the outdoor fan, and then adjust the speed of the outdoor fan, which can effectively extend the heating cycle and reduce the number of defrosting, thereby improving the indoor heating effect and increasing User experience.

Description of drawings

In order to illustrate the present invention or the technical solution in the prior art more clearly, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are the present invention. For some embodiments of the invention, those skilled in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is a schematic diagram of the arrangement relationship of the air conditioner provided by the present invention;

Fig. 2 is a schematic flow chart of the control method of the air conditioner provided by the present invention;

Fig. 3 is a structural schematic diagram of the control device of the air conditioner provided by the present invention.

Reference signs:

10. Outdoor unit; 11. Heat exchanger; 12. Fan; 20. Indoor unit; 30. Refrigerant circulation loop; 40. Obtaining module; 50. Generating module; 60. Executing module.

Detailed ways

In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

The present invention will be specifically described below in combination with specific embodiments.

In some specific embodiments of the present invention, as shown in Figure 1 and Figure 2, this program provides a control method for an air conditioner, the air conditioner includes: an outdoor unit 10 and an indoor unit 20, and the outdoor unit 10 and the indoor unit 20 are connected A refrigerant circulation circuit 30 is formed, and the outdoor unit 10 includes a heat exchanger 11 arranged on the refrigerant circuit, and a fan 12 corresponding to the heat exchanger 11;

Methods include:

Responding to the heating signal, obtaining the temperature characteristic and the preset defrosting temperature of the heat exchanger 11;

Generate adjustment strategies based on temperature characteristics and preset defrosting temperatures;

The immediate rotational speed of the fan 12 is adjusted according to the adjustment strategy.

It should be noted that when the air conditioner is running for heating in the heating season, the existing outdoor heat exchanger 11 needs to absorb heat from the outdoor environment (low temperature heat source), and the surface temperature is generally relatively low (below 0°C). During the process, the water vapor in the air condenses on the surface of the heat exchanger 11 to form frost, and the frost on 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, forming a vicious circle.

Therefore, when the system detects that the outdoor heat exchanger 11 is frosted to a certain extent, it will defrost. It is the same as the cooling mode, defrosts the outdoors through the refrigerant, and then heats up after defrosting. However, during the defrosting process, the indoor heat exchange temperature is low, and the indoor fan 12 generally stops. Therefore, during the defrosting process, the indoor is not heated, which will cause temperature fluctuations.

Based on the above defects or problems in the 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 speed of the fan 12 according to the preset defrosting temperature. Increase the air volume sent to the heat exchanger 11 before frosting in the heat exchanger 11, so that the heat exchanger 11 can obtain more heat, and avoid the phenomenon that the surface of the heat exchanger 11 is frosted due to insufficient heat, which is equivalent to extending The heating cycle is shortened, the effect of pre-defrosting is achieved, the frequency of defrosting is reduced, and the heating effect of the heating indoor unit 20 is improved.

In some possible embodiments of the present invention, the step of obtaining the temperature characteristics of the heat exchanger 11 specifically includes:

Obtain the first instant refrigerant temperature of the refrigerant in the heat exchanger 11, and the ambient temperature outside where the outdoor unit 10 is located;

A temperature feature is generated according to the first instant refrigerant temperature and the ambient temperature.

Specifically, this embodiment provides an implementation manner of acquiring the temperature characteristics of the heat exchanger 11. The temperature of the heat exchanger 11 in the outdoor unit 10 is acquired, and the first instant refrigerant temperature is generated. 10 The ambient temperature of the outdoor environment where the temperature characteristics of the heat exchanger 11 are determined according to the first instant refrigerant temperature and the ambient temperature, and the input required for the heat exchanger 11 is determined according to the two characteristic values of the first instant refrigerant temperature and the ambient temperature The magnitude of the air volume, and the input of different magnitudes of air volume can be realized by adjusting the instantaneous speed of the fan 12.

In some possible embodiments of the present invention, the step of generating the temperature feature according to the first instant refrigerant temperature and the ambient temperature specifically includes:

Obtain the heat transfer coefficient of heat exchange between the heat exchanger 11 and the outside in unit time;

Determine the immediate heat exchange rate of the heat exchanger 11 according to the heat exchange coefficient, the first instant refrigerant temperature and the ambient temperature;

Generates temperature signatures based on instantaneous heat transfer rates.

Specifically, this embodiment provides an implementation of generating temperature characteristics based on the first instant refrigerant temperature and the ambient temperature. By determining the heat transfer coefficient of heat exchange between the heat exchanger 11 and the outdoor environment, it can be clearly The instant heat exchange rate between the heat exchanger 11 and the outdoor environment, and then adjust the speed of the fan 12 more accurately.

It should be noted that different outdoor temperatures and different refrigerant temperatures in the heat exchanger 11 will lead to uncertain heat transfer coefficients of heat transfer. Therefore, by obtaining the heat transfer coefficients, it can be clearly determined that the heat exchanger 11 and the The magnitude of heat exchange in the outdoor environment determines the air supply volume of the fan 12 , that is, the heat input into the heat exchanger 11 per unit time.

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 the heat blown to the coil of the heat exchanger 11 is increased per unit time, the temperature of the coil of the heat exchanger 11 can be kept stable or increased. During the defrosting cycle of the heater 11, the fluctuation of the indoor temperature is small, which improves the comfort of the user.

In a possible implementation, the temperature of the heat exchanger 11 is set to a plurality of gradient values, and the temperature of the heat exchanger 11 is acquired in real time, and when it is determined that the temperature of the heat exchanger 11 is within the corresponding gradient value, it is acquired again The heat transfer coefficient of the heat exchange between the heat exchanger 11 and the outside is to ensure that the speed adjustment of the fan 12 can meet the heat exchange rate of the heat exchanger 11, and to ensure that the heat blown to the coil of the heat exchanger 11 is stable at the same time. The energy exchanged between the heat exchanger 11 and the outside can also be kept stable, ensuring that the range of indoor temperature fluctuations meets the corresponding setting requirements, and improving the user's comfort.

In some possible embodiments of the present invention, the step of obtaining the temperature characteristics of the heat exchanger 11 specifically further includes:

Acquiring the refrigerant flow parameters passing through the refrigerant in the heat exchanger 11 within the collection time period;

Obtain the operating mode of the air conditioner;

Generate a refrigerant flow estimation function according to the refrigerant flow parameters and the operating mode, and the refrigerant flow estimation function identifies the estimated refrigerant flow through the heat exchanger 11 within the collection time period;

A temperature feature is generated according to the first instant refrigerant temperature ambient temperature and the refrigerant flow estimation function.

Specifically, this embodiment provides an implementation of acquiring the temperature characteristics of the heat exchanger 11. By acquiring the refrigerant flow parameters of the heat exchanger 11 within the acquisition time period, combined with the operating mode of the air conditioner, it is estimated The estimated refrigerant flow rate of the refrigerant flowing into the heat exchanger 11 is used to more accurately determine the magnitude of heat delivered by the fan 12 to the heat exchanger 11 according to the estimated refrigerant flow rate, so as to ensure the pre-defrosting effect of the heat exchanger 11 .

In a possible implementation, the operating mode of the air conditioner will cause different levels of refrigerant to enter the heat exchanger 11 in the outdoor unit 10, and then the different levels of refrigerant will cause the heat transfer coefficient and heat transfer capacity of the heat exchanger 11 to vary. Therefore, by obtaining the operation 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 realize the precise regulation of the speed of the fan 12. The operation mode of the air conditioner can be different heating The level or heating mode combines different working modes such as sleep, clean, and environmental protection.

In a possible implementation, different operating modes of the air conditioner will also lead to changes in the opening of the electronic expansion valve, and different openings of the electronic expansion valve will result in different flows of refrigerant entering the heat exchanger 11 in the outdoor unit 10 .

In some possible embodiments of the present invention, the step of generating an adjustment strategy according to the temperature characteristics and the preset defrosting temperature specifically includes:

Determine the target speed of the fan 12 according to the temperature characteristics and the preset defrosting temperature;

A regulation strategy is generated based on the target rotational speed.

Specifically, this embodiment provides an implementation of generating an adjustment strategy based on the temperature characteristics and the preset defrosting temperature. The target speed of the fan 12 is determined through the temperature characteristics and the preset defrosting temperature, so that the regulation of the fan 12 is more accurate. Intuitive, it is convenient to determine whether the heat delivered by the fan 12 to the heat exchanger 11 can meet the pre-defrosting requirement of the heat exchanger 11 through the target speed of the fan 12 .

In some possible embodiments of the present invention, the step of determining the target rotational speed of the fan 12 according to the temperature characteristics and the preset defrosting temperature further includes:

The control interval is determined according to the temperature characteristics and the preset defrosting temperature, and a first preset rotation speed is set in each control interval;

A target rotational speed is generated according to a first preset rotational speed.

Specifically, this embodiment provides an implementation in which the target rotational speed of the fan 12 is determined according to the temperature characteristics and the preset defrosting temperature. Multiple control intervals are preset, and the corresponding rotational speed of the fan 12 is set in each control interval. After the corresponding control interval is determined through the temperature characteristics and the preset defrosting temperature, the corresponding first preset speed of the fan 12 is directly called, and the target speed of the fan 12 is generated according to the first preset speed.

In a possible implementation, it is determined that the temperature value of the heat exchanger 11 is greater than zero and is in the first temperature range, the first preset speed is obtained, and the first target speed for adjusting the speed of the fan 12 is generated according to the first preset speed;

Determine that the temperature value of the heat exchanger 11 is greater than zero and is in the second temperature range, obtain the corresponding first preset speed, and generate a second target speed for adjusting the speed of the fan 12 according to the corresponding first preset speed;

It is determined that the temperature value of the heat exchanger 11 is greater than zero and is in the third temperature range, then the speed of the fan 12 is adjusted to the maximum speed;

Wherein, the temperature values of the first temperature interval, the second temperature interval and the third temperature interval decrease sequentially.

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

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

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

In some possible embodiments of the present invention, the step of adjusting the immediate rotational speed of the fan 12 according to the adjustment strategy specifically includes:

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

If it is determined that the temperature of the second immediate refrigerant rises to the preset temperature threshold, the fan 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is the speed of the fan 12 in the corresponding operating mode of the air conditioner;

If it is determined that the temperature of the second immediate refrigerant does not rise to the preset temperature threshold within the preset adjustment period, then the fan 12 is adjusted from the immediate speed to the maximum speed.

Specifically, this embodiment provides an implementation mode of adjusting the instant rotational speed of the fan 12 according to the adjustment strategy. After adjusting the rotational speed of the fan 12, by judging the second instant refrigerant temperature of the refrigerant in the heat exchanger 11, According to the corresponding changes in the temperature of the second instant refrigerant, the speed of the fan 12 is adjusted quickly to ensure the pre-defrosting effect of the heat exchanger 11, and to prevent the pre-defrosting effect of the heat exchanger 11 from failing to achieve the preset effect, which in turn leads to Frosting on the surface of the heat exchanger 11 further affects the efficiency of the heat exchanger 11.

In a possible implementation, if it is determined that the temperature of the second immediate refrigerant rises to the preset temperature threshold, the speed of the fan 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is the operating mode of the air conditioner at this time. The lower speed ensures the indoor heating effect, avoids large temperature fluctuations, and reduces energy consumption at the same time.

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

In some possible embodiments of the present invention, the step of adjusting the immediate rotational speed of the fan 12 according to the adjustment strategy specifically includes:

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

If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment cycle reaches the preset temperature rise range, then the fan 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is when the fan 12 is in the corresponding operation mode of the air conditioner. speed;

If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment period does not reach the preset temperature rise range, then the fan 12 is adjusted from the instant speed to the maximum speed.

Specifically, this embodiment provides an implementation mode of adjusting the instant rotational speed of the fan 12 according to an adjustment strategy. After adjusting the rotational speed of the fan 12, by judging the second instant refrigerant temperature of the refrigerant in the heat exchanger 11, According to the corresponding changes in the temperature of the second instant refrigerant, the speed of the fan 12 is adjusted quickly to ensure the pre-defrosting effect of the heat exchanger 11, and to prevent the pre-defrosting effect of the heat exchanger 11 from failing to achieve the preset effect, which in turn leads to Frosting on the surface of the heat exchanger 11 further affects the efficiency of the heat exchanger 11.

In a possible implementation, after the second instant refrigerant temperature rises within the preset adjustment cycle to a preset temperature rise, it appears that the heat delivered by the fan 12 to the heat exchanger 11 can meet the pre-defrosting requirements. Adjust the rotation speed of the fan 12 from the instant rotation speed to the second preset rotation speed, which is the rotation speed in the air conditioner operating mode at this time, so as to ensure the indoor heating effect, avoid large temperature fluctuations, and reduce energy consumption at the same time .

In a possible implementation, if it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment cycle does not reach the preset temperature rise range, after the step of adjusting the fan 12 from the instant speed to the maximum speed, it also includes: sending a corresponding response to the user. The prompt information indicates that the heat exchanger 11 has a risk of frosting, and maintenance or manual defrosting is required, or the operating status of the corresponding equipment is checked.

In some specific embodiments of the present invention, as shown in FIG. 3 , this solution provides a control device for an air conditioner, including: an acquisition module 40 , a generation module 50 and an execution module 60 ;

The obtaining module 40 is used to obtain the temperature characteristic and the preset defrosting temperature of the heat exchanger 11 in response to the heating signal;

The generation module 50 is used to generate an adjustment strategy according to the temperature characteristics and the preset defrosting temperature;

The execution module 60 is used for adjusting the instantaneous rotational speed of the fan 12 according to the adjustment strategy.

Optionally, the step of obtaining the temperature characteristics of the heat exchanger 11 specifically includes:

Obtain the first instant refrigerant temperature of the refrigerant in the heat exchanger 11, and the ambient temperature outside where the outdoor unit 10 is located;

A temperature feature is generated according to the first instant refrigerant temperature and the ambient temperature.

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

Optionally, the step of generating the temperature feature according to the first instant refrigerant temperature and the ambient temperature specifically includes:

Obtain the heat transfer coefficient of heat exchange between the heat exchanger 11 and the outside in unit time;

Determine the immediate heat exchange rate of the heat exchanger 11 according to the heat exchange coefficient, the first instant refrigerant temperature and the ambient temperature;

Generates temperature signatures based on instantaneous heat transfer rates.

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

Optionally, in the step of obtaining the temperature characteristics of the heat exchanger 11, specifically, it also includes:

Acquiring the refrigerant flow parameters passing through the refrigerant in the heat exchanger 11 within the collection time period;

Obtain the operating mode of the air conditioner;

Generate a refrigerant flow estimation function according to the refrigerant flow parameters and the operating mode, and the refrigerant flow estimation function identifies the estimated refrigerant flow through the heat exchanger 11 within the collection time period;

A temperature feature is generated according to the first instant refrigerant temperature ambient temperature and the refrigerant flow estimation function.

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

Optionally, the step of generating an adjustment strategy according to the temperature characteristics and the preset defrosting temperature specifically includes:

Determine the target speed of the fan 12 according to the temperature characteristics and the preset defrosting temperature;

A regulation strategy is generated based on the target rotational speed.

Specifically, this embodiment provides an implementation manner of generating an adjustment strategy according to temperature characteristics and a preset defrosting temperature.

Optionally, the step of determining the target rotational speed of the fan 12 according to the temperature characteristics and the preset defrosting temperature further includes:

The control interval is determined according to the temperature characteristics and the preset defrosting temperature, and a first preset rotation speed is set in each control interval;

A target rotational speed is generated according to a first preset rotational speed.

Specifically, this embodiment provides an implementation in which the target rotational speed of the fan 12 is determined according to the temperature characteristics and the preset defrosting temperature.

Optionally, the step of adjusting the immediate rotational speed of the fan 12 according to the adjustment strategy specifically includes:

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

If it is determined that the temperature of the second immediate refrigerant rises to the preset temperature threshold, the fan 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is the speed of the fan 12 in the corresponding operating mode of the air conditioner;

If it is determined that the temperature of the second immediate refrigerant does not rise to the preset temperature threshold within the preset adjustment period, then the fan 12 is adjusted from the immediate speed to the maximum speed.

Specifically, this embodiment provides an implementation manner of adjusting the immediate rotational speed of the fan 12 according to an adjustment strategy.

Optionally, the step of adjusting the immediate rotational speed of the fan 12 according to the adjustment strategy specifically includes:

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

If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment cycle reaches the preset temperature rise range, then the fan 12 is adjusted from the instant speed to the second preset speed, and the second preset speed is when the fan 12 is in the corresponding operation mode of the air conditioner. speed;

If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment cycle does not reach the preset temperature rise range, then the fan 12 is adjusted from the instant speed to the maximum speed.

Specifically, this embodiment provides an implementation manner of adjusting the immediate rotational speed of the fan 12 according to an adjustment strategy.

In some specific embodiments of the present invention, the solution provides an air conditioner, including the above-mentioned control method for the air conditioner, or the above-mentioned control device for the air conditioner.

In the description of the embodiments of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrated connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention according to specific situations.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "mode", "specific ways", or "some ways" mean specific features described in conjunction with the embodiment or mode , structure, material or feature is 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. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or modes. In addition, those skilled in the art can combine and combine different embodiments or modes and features of different embodiments or modes described in this specification without conflicting with each other.

Finally, it should be noted that: the above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled 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 all should cover Within the scope of the claims of the present invention.

Claims (10)

1. A control method for an air conditioner, characterized in that the air conditioner comprises: an outdoor unit (10) and an indoor unit (20), and the outdoor unit (10) and the indoor unit (20) communicate to form a refrigerant A circulation circuit (30), the outdoor unit (10) comprising a heat exchanger (11) arranged on the refrigerant circuit, and a fan (12) corresponding to the heat exchanger (11); The methods include: Responding to a heating signal, acquiring temperature characteristics and a preset defrosting temperature of the heat exchanger (11); generating an adjustment strategy according to the temperature characteristics and the preset defrosting temperature; The immediate rotational speed of the fan (12) is adjusted according to the adjustment strategy. 2. The control method of the air conditioner according to claim 1, characterized in that, in the step of obtaining the temperature characteristics of the heat exchanger (11), specifically comprising: Obtaining the first instant refrigerant temperature of the refrigerant in the heat exchanger (11) and the ambient temperature outside where the outdoor unit (10) is located; The temperature feature is generated according to the first instant refrigerant temperature and the ambient temperature. 3. The control method of an air conditioner according to claim 2, wherein the step of generating the temperature feature according to the first instant refrigerant temperature and the ambient temperature specifically includes: Obtain the heat transfer coefficient of the heat exchange between the heat exchanger (11) and the outdoor in a unit time; determining the instant heat exchange rate of the heat exchanger (11) according to the heat exchange coefficient, the first instant refrigerant temperature and the ambient temperature; The temperature signature is generated based on the instantaneous heat transfer rate. 4. The control method of the air conditioner according to claim 2, characterized in that, in the step of obtaining the temperature characteristics of the heat exchanger (11), specifically further comprising: Obtaining the refrigerant flow parameters passing through the refrigerant in the heat exchanger (11) within the collection time period; Obtain the operating mode of the air conditioner; generating a refrigerant flow estimation function according to the refrigerant flow parameter and the operation mode, the refrigerant flow estimation function identifying the refrigerant estimated flow through the heat exchanger (11) within the collection time period; The temperature feature is generated according to the first instant refrigerant temperature, the ambient temperature and the refrigerant flow estimation function. 5. The control method of an air conditioner according to any one of claims 1 to 4, characterized in that the step of generating an adjustment strategy according to the temperature characteristics and the preset defrosting temperature specifically includes: determining the target rotational speed of the fan (12) according to the temperature characteristics and the preset defrosting temperature; The regulation strategy is generated according to the target rotational speed. 6. The control method of the air conditioner according to claim 5, characterized in that, in the step of determining the target speed of the fan (12) according to the temperature characteristics and the preset defrosting temperature, specifically include: A control interval is determined according to the temperature characteristics and the preset defrosting temperature, and a first preset rotation speed is set in each of the control intervals; The target rotational speed is generated according to the first preset rotational speed. 7. The control method of the air conditioner according to claim 5, characterized in that, the step of adjusting the instant rotational speed of the fan (12) according to the adjustment strategy specifically comprises: Acquiring the second instant refrigerant temperature of the refrigerant in the heat exchanger (11), and making a judgment; If it is determined that the temperature of the second instant refrigerant rises to a preset temperature threshold, the fan (12) is adjusted from the instant speed to a second preset speed, and the second preset speed is the fan (12) the rotational speed in the corresponding operation mode of the air conditioner; If it is determined that the temperature of the second immediate refrigerant has not risen to a preset temperature threshold within a preset adjustment period, then the fan (12) is adjusted from the instant rotation speed to a maximum rotation speed. 8. The control method of the air conditioner according to claim 5, characterized in that, the step of adjusting the immediate rotational speed of the fan (12) according to the adjustment strategy specifically comprises: Acquiring the second instant refrigerant temperature of the refrigerant in the heat exchanger (11), and making a judgment; If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment period reaches the preset temperature rise range, the fan (12) is adjusted from the instant speed to a second preset speed, and the second preset speed is the rotational speed of the fan (12) in the corresponding operating mode of the air conditioner; If it is determined that the temperature rise of the second instant refrigerant temperature within the preset adjustment cycle does not reach the preset temperature rise range, then the fan (12) is adjusted from the instant speed to the maximum speed. 9. A control device for an air conditioner, comprising: an acquisition module (40), a generation module (50) and an execution module (60); The acquisition module (40) is used to acquire the temperature characteristics and the preset defrosting temperature of the heat exchanger (11) in response to the heating signal; The generating module (50) is used to generate an adjustment strategy according to the temperature characteristics and the preset defrosting temperature; The execution module (60) is used for adjusting the immediate rotational speed of the blower fan (12) according to the adjustment strategy. 10. An air conditioner, characterized by comprising the control method of the air conditioner according to any one of claims 1 to 8 above, or the control device of the air conditioner according to claim 9 above.

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