CN107917510A - A kind of control method and device of outdoor fan of air-conditioner rotating speed - Google Patents

Abstract

The invention discloses a method for controlling an outdoor fan of an air conditioner, which includes: obtaining a first indoor temperature of an indoor area where the air conditioner is located; determining and controlling the outdoor fan according to the first temperature difference between the first indoor temperature and a target indoor temperature The wind speed of the first outdoor unit is running; obtain the second indoor temperature and the operating frequency of the compressor in the indoor area after the set time interval; determine and determine according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency Control the outdoor fan to run at the second outdoor fan speed. The method for controlling the speed of the outdoor fan of the air conditioner provided by the present invention can accurately control the wind speed of the outdoor unit in two states according to the unstable state and the stable state when the air conditioner is turned on, and reduce the influence of the instantaneous pressure difference of the system on the air conditioning system , improve the stability of the system operation.

Description

A method and device for controlling the speed of an air conditioner outdoor fan

technical field

The invention relates to the technical field of air conditioners, in particular to a method and device for controlling the speed of an outdoor fan of an air conditioner.

Background technique

In the existing air-conditioning products, whether it is a split type air conditioner or an integrated air conditioner, it includes two parts: the outdoor and the indoor. environment for heat exchange. In order to achieve a better heat exchange effect, in general, during the operation of the air conditioner, the speed of the different fans must be controlled. If the heat exchange needs to be accelerated, the speed of the fan can be increased, or when the heat exchange needs to be slowed down. , you can reduce the fan speed. Therefore, the change of the rotational speed of the fan can be directly related to the heating or cooling performance of the air conditioner.

Among them, in the speed control method of the outdoor fan, especially when the fixed-frequency air conditioner has just been turned on for cooling operation, since the fixed-frequency air conditioner has only one operating frequency, when it receives a start-up signal, it will use a higher frequency In addition, because the throttling device of the air conditioner mostly adopts a capillary structure, it cannot adjust the indoor evaporation pressure in real time like an electronic expansion valve, which leads to a rapid drop in the coil temperature of the indoor unit within a relatively short period of time after starting up. 2. According to the existing air conditioner operating procedures, the outdoor fan will enter a low-speed state, which will reduce the cooling capacity input indoors and affect the cooling effect of the air conditioner. At the same time, because the outdoor unit is in a high-pressure state, the fan will run at a low speed, which will cause the pressure to continue to rise. High, the pressure difference of the system increases, and the stability of the whole machine is poor. Also in the process of heating operation, the temperature of the indoor coil will rise soon after the heating is turned on. When the temperature of the indoor coil is detected to be above 53°C, the outdoor fan will turn to low speed operation. During this period, the liquid The refrigerant will not evaporate completely in the outdoor unit. If this control method fails to balance the system for a long time, a large amount of liquid refrigerant will enter the liquid storage. These problems will lead to large instantaneous changes in the internal pressure of the air conditioning system, affecting the reliability and stability of the whole machine.

Contents of the invention

The invention provides a method and device for controlling the speed of an outdoor fan of an air conditioner, aiming at solving the problem of unstable operation caused by the influence of instantaneous pressure changes during the operation of the air conditioner. In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is presented below. This summary is not an overview, nor is it intended to identify key/critical elements or delineate the scope of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to the second aspect of the present invention, there is also provided a method for controlling the outdoor fan of an air conditioner, including: obtaining the first indoor temperature of the indoor area where the air conditioner is located; value, determine and control the outdoor fan to run at the first outdoor fan speed; obtain the second indoor temperature and the operating frequency of the compressor in the indoor area after the set time interval; according to the second temperature difference between the second indoor temperature and the target indoor temperature value, and operating frequency, determine and control the outdoor fan to run at the second outdoor fan speed.

In an optional implementation manner, before determining and controlling the outdoor fan to operate at the first outdoor fan speed according to the first temperature difference between the first indoor temperature and the target indoor temperature, the control method further includes: determining the operation of the air conditioner mode, wherein the operation mode includes cooling mode and heating mode; when the operation mode is cooling mode, the first temperature difference is the first cooling temperature difference obtained by subtracting the target indoor temperature from the first indoor temperature, and the second temperature difference The value is the second cooling temperature difference obtained by subtracting the target indoor temperature from the second indoor temperature; when the operating mode is heating mode, the first temperature difference is the first heating temperature obtained by subtracting the first indoor temperature from the target indoor temperature The temperature difference value, the second temperature difference value is the second heating temperature obtained by subtracting the second indoor temperature from the target indoor temperature.

In an optional implementation manner, when the operation mode is the cooling mode, according to the first temperature difference between the first indoor temperature and the target indoor temperature, determining and controlling the outdoor fan to run at the first outdoor fan speed, including: when When the first cooling temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed; when the first cooling temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the first outdoor unit The wind speed is the middle wind speed; when the first cooling temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is the low wind speed; when the operation mode is heating mode, according to the first indoor temperature and the target indoor temperature Temperature difference, determine and control the outdoor fan to run at the first outdoor wind speed, including: when the first heating temperature difference is greater than the first temperature difference threshold, the first outdoor wind speed is high wind speed; when the first heating temperature When the difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the wind speed of the first outdoor unit is medium wind speed; when the first heating temperature difference is less than the second temperature difference threshold, the wind speed of the first outdoor unit is low wind. wind speed.

In an optional implementation, when the operation mode is cooling mode, according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency, determine and control the outdoor fan to run at the second outdoor fan speed , including: when the second temperature difference is greater than the third temperature difference threshold, determining that the wind speed of the second outdoor unit is high wind speed; when the second temperature difference is less than the third temperature difference threshold, determining the second outdoor unit wind speed according to the operating frequency , including: when the operating frequency is greater than or equal to the first frequency threshold, determining the wind speed of the second outdoor unit as a medium wind speed; when the operating frequency is less than the first frequency threshold, determining the wind speed of the second outdoor unit as a low wind speed.

In an optional implementation, when the operation mode is the heating mode, according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency, determine and control the outdoor fan to operate at the second outdoor fan speed. Operation, including: when the second temperature difference is greater than the fourth temperature difference threshold, determine that the wind speed of the second outdoor unit is high wind; when the second temperature difference is less than the fourth temperature difference threshold, determine the second outdoor unit according to the operating frequency The wind speed includes: when the operating frequency is greater than or equal to the second frequency threshold, determining the wind speed of the second outdoor unit as the middle wind speed; when the operating frequency is less than the second frequency threshold, determining the second outdoor unit wind speed as the low wind speed.

According to the second aspect of the present invention, there is also provided a control device for an outdoor fan of an air conditioner, including: a first acquiring module, configured to acquire a first indoor temperature of the indoor area where the air conditioner is located; a first main control module configured to Based on the first temperature difference between the first indoor temperature and the target indoor temperature, determine and control the outdoor fan to run at the first outdoor fan speed; the second acquisition module is used to acquire the second indoor area of the indoor area after the set time interval Temperature and operating frequency of the compressor; the second main control module is used to determine and control the outdoor fan to operate at the second outdoor machine wind speed according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency.

In an optional implementation manner, the control method further includes a determination module. The determination module is used to determine and control the outdoor fan at the first temperature according to the first temperature difference between the first indoor temperature and the target indoor temperature in the first main control module. Before the wind speed of the outdoor unit runs, determine the operating mode of the air conditioner, wherein the operating mode includes cooling mode and heating mode; when the operating mode is cooling mode, the first temperature difference is obtained by subtracting the target indoor temperature from the first indoor temperature The first cooling temperature difference, the second temperature difference is the second cooling temperature difference obtained by subtracting the target indoor temperature from the second indoor temperature; when the operating mode is heating mode, the first temperature difference is the target indoor temperature minus The first heating temperature difference obtained by subtracting the first indoor temperature, and the second temperature difference is the second heating temperature obtained by subtracting the second indoor temperature from the target indoor temperature.

In an optional implementation manner, the first main control module includes a first main control submodule and a second main control submodule, wherein, when the operating mode is cooling mode, the first main control submodule is used to: When the first cooling temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed; when the first cooling temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the first outdoor unit The wind speed is medium wind speed; when the first cooling temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is low wind wind speed; when the operation mode is heating mode, the second main control submodule is used to: when the first When the heating temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed; when the first heating temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the first outdoor unit The wind speed is a medium wind speed; when the first heating temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is a low wind speed.

In an optional implementation manner, the second main control module includes a third main control sub-module, and the third main control sub-module is configured to, when the operating mode is cooling mode, when the second temperature difference is greater than the third temperature difference threshold When the wind speed of the second outdoor unit is determined to be the high wind speed; when the second temperature difference is less than the third temperature difference threshold, the wind speed of the second outdoor unit is determined according to the operating frequency, including: when the operating frequency is greater than or equal to the first frequency threshold , determine the wind speed of the second outdoor unit as the middle wind speed; when the operating frequency is lower than the first frequency threshold, determine the wind speed of the second outdoor unit as the low wind speed.

In an optional implementation manner, the second main control module includes a fourth main control submodule, and the fourth main control submodule is used to: when the operating mode is the heating mode: when the second temperature difference is greater than the fourth temperature difference When the threshold is reached, determine the wind speed of the second outdoor unit as high wind speed; when the second temperature difference is less than the fourth temperature difference threshold, determine the second outdoor unit wind speed according to the operating frequency, including: when the operating frequency is greater than or equal to the second frequency threshold When the wind speed of the second outdoor unit is determined to be the middle wind speed; when the operating frequency is less than the second frequency threshold, the wind speed of the second outdoor unit is determined to be the low wind speed.

The invention provides a method for controlling the rotational speed of an outdoor fan of an air conditioner, which can accurately control the wind speed of the outdoor unit in two states according to the unstable state and the stable state when the air conditioner is started, and reduce the impact of the instantaneous pressure difference of the system on the air conditioning system. influence and improve the stability of system operation.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is a flow chart 1 of the control method of the present invention shown according to an exemplary embodiment;

Fig. 2 is a flowchart 2 of the control method of the present invention shown according to an exemplary embodiment;

Fig. 3 is a structural block diagram 1 of the control device of the present invention shown according to an exemplary embodiment;

Fig. 4 is a second structural block diagram of the control method of the present invention according to an exemplary embodiment.

Detailed ways

The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, relational terms such as first and second etc. are used only to distinguish one entity or operation from another without requiring or implying any actual relationship or relationship between these entities or operations. order. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed elements, or also include elements inherent in such a process, method, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method or apparatus comprising said element. Various embodiments herein are described in a progressive manner, each embodiment focuses on the differences from other embodiments, and the same and similar parts of the various embodiments may be referred to each other. As for the methods, products, etc. disclosed in the examples, since they correspond to the methods disclosed in the examples, the description is relatively simple, and for relevant details, please refer to the description of the methods.

Fig. 1 is a flow chart of the control method of the present invention shown according to an exemplary embodiment.

As shown in Figure 1, the present invention provides a method for controlling the speed of an outdoor fan of an air conditioner, which can be used to control and adjust the speed of the outdoor fan when the air conditioner is running or the internal system pressure of the air conditioner has a large instantaneous pressure change. Specifically, The process steps of the control method include:

S101. Obtain the first indoor temperature of the indoor area where the air conditioner is located;

In the present and subsequent embodiments of the present invention, a split-type air conditioner is used as an example for illustration. The split-type air conditioner mainly includes an indoor unit and an outdoor unit. Outdoor areas such as building exterior walls and roofs. The indoor unit is equipped with a temperature sensor, which can sense the temperature change in the indoor environment. In this way, in step S101, the indoor temperature can be detected by the temperature sensor and used as the first indoor temperature parameter in this control process.

Generally, indoor areas such as the living room and bedroom are respectively provided with an indoor unit, and each indoor unit is equipped with an independent outdoor unit. In the air conditioner of the control method of the present invention, the collected indoor temperature is the temperature parameter of the specific indoor area where the indoor unit is located. For example, for the indoor unit installed in the living room, the air conditioner executes the first indoor temperature obtained in step S101 is the real-time temperature of the living room area; similarly, for the indoor unit installed in the bedroom, the air conditioner obtains the real-time temperature of the bedroom.

For office buildings, hotels and other application scenarios, most of the "one-to-many" commercial air conditioner models are used, that is, one outdoor unit is connected to two or more indoor units at the same time. are located in different indoor areas. Therefore, for the above-mentioned commercial air conditioner models, the indoor units in the activated state collect the indoor temperature of the corresponding indoor area through independent temperature sensors, and then use preset algorithms such as weighting algorithms to calculate The mean value of the indoor temperature is used as the first indoor temperature parameter of this control process.

S102. Determine and control the outdoor fan to run at the first outdoor fan speed according to the first temperature difference between the first indoor temperature and the target indoor temperature;

In step S102, the first indoor temperature is the indoor temperature parameter obtained in step S101, and the target indoor temperature is the expected indoor temperature value input by the user through the remote control or the control panel. Among them, for the above-mentioned household air conditioner model, because it is a structure in which one indoor unit corresponds to one outdoor unit, the target indoor temperature value in step S102 is a single set temperature value; and for the above-mentioned household air conditioner model, because it is a One outdoor unit corresponds to the structure of multiple indoor units, and the user may set different target indoor temperatures for different indoor units. Therefore, the target indoor temperature can be set by multiple indoor units that are enabled. The average value obtained by weighted calculation of the target indoor temperature; or, the air conditioner may pre-store default target indoor temperature values for different seasons or different times of the day, then the default target indoor temperature value may be used as the target indoor temperature in step S102.

For example, in one embodiment, the default target indoor temperature value set by the air conditioner includes, but is not limited to, 28°C in summer, 20°C in winter, etc.; or, the default target indoor temperature value at different times on the same day in summer includes But not limited to, 8 o'clock is 28°C, 12 o'clock is 25°C, 15 o'clock is 24°C, and so on. In this way, when the set target indoor temperatures received by multiple indoor units of a commercial air conditioner have large differences, the air conditioner can obtain the target indoor temperature of this control process by checking the default target indoor temperature value preset by the system .

In one embodiment, under cooling conditions in summer, the target indoor temperature is generally lower than the indoor temperature; while under heating conditions in winter, the target indoor temperature is generally higher than the indoor temperature. Therefore, in order to facilitate the determination of the first outdoor unit wind speed in the outdoor fan, the control process of the present invention determines and controls the outdoor fan to operate at the first outdoor unit wind speed before determining and controlling the outdoor fan according to the temperature difference between the first indoor temperature and the target indoor temperature. The operation mode of the air conditioner is also determined in advance, wherein the operation mode includes a cooling mode and a heating mode.

In this way, when the operation mode is cooling mode, the first temperature difference is the first cooling temperature difference obtained by subtracting the target indoor temperature from the first indoor temperature, and the second temperature difference is obtained by subtracting the target indoor temperature from the second indoor temperature The second cooling temperature difference; when the operating mode is heating mode, the first temperature difference is the first heating temperature difference obtained by subtracting the first indoor temperature from the target indoor temperature, and the second temperature difference is the target indoor temperature The second heating temperature obtained by subtracting the second indoor temperature from the temperature.

Alternatively, in step S102, the absolute value of the temperature difference between the first indoor temperature and the target indoor temperature may be directly calculated, and the outdoor fan is determined and controlled to run at the first outdoor fan speed according to the absolute value.

Specifically, in an optional embodiment, when the operating mode of the air conditioner is the cooling mode, in step S102, according to the first temperature difference between the first indoor temperature and the target indoor temperature, determine and control the outdoor fan at the first The wind speed operation of the external unit mainly includes:

When the first cooling temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed;

When the first cooling temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the wind speed of the first outdoor unit is a stroke wind speed;

When the first cooling temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is low wind speed.

In this implementation, both the first temperature difference threshold and the second temperature difference threshold are threshold parameters preset by the air conditioner. Preferably, the first temperature difference threshold is 1.5°C to 2.5°C, and the second temperature difference threshold is -0.5°C to 0.5°C.

For the outdoor fan of the air conditioner, it has a maximum wind speed upper limit. For example, the maximum wind speed upper limit of the outdoor fan in a certain embodiment is the wind speed corresponding to the speed of 1500r/min, and the speed of the outdoor fan can be adjusted between 0 and 1500r/min. , so as to change the wind speed of the outdoor fan. The present invention divides the speed of the outdoor fan into multiple wind speed intervals according to the speed of the speed. The corresponding wind speed range, and 0~500r/min is the wind speed range corresponding to the low wind speed. In this way, when the first cooling temperature difference satisfies the judgment condition of one of the above-mentioned and preset threshold parameters, the outdoor The wind speed of the fan is adjusted to the aforementioned corresponding speed, so as to control the actual wind speed of the outdoor fan to be in the matching wind speed range.

Or, in another embodiment, the outdoor fan adopts different gear settings for speed control and wind speed adjustment. For example, the outdoor fan includes five gears of 1, 2, 3, 4, and 5, wherein gear 1 has low wind speed. The speed gear corresponding to the wind speed, the speed gear corresponding to the wind speed of the 2nd and 3 gears, and the speed gear corresponding to the high wind speed of the 4 and 5 gears. In this way, when the first cooling temperature difference satisfies the judgment condition of one of the above-mentioned preset threshold parameters, the wind speed of the outdoor fan can be adjusted to the above-mentioned corresponding gear, so as to control the actual wind speed of the outdoor fan at Matching wind speed range.

In another optional embodiment, when the operating mode is the heating mode, in step S102, according to the first temperature difference between the first indoor temperature and the target indoor temperature, determine and control the outdoor fan to operate at the first outdoor fan speed. run, which mainly includes:

When the first heating temperature difference is greater than the first temperature difference threshold, the first outdoor unit wind speed is high wind speed;

When the first heating temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the wind speed of the first outdoor unit is a stroke wind speed;

When the first heating temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is low wind speed.

In this implementation, both the first temperature difference threshold and the second temperature difference threshold are threshold parameters preset by the air conditioner. Preferably, the first temperature difference threshold is 1.5°C to 2.5°C, and the second temperature difference threshold is -0.5°C to 0.5°C.

The determination and control method of the wind speed of the first outdoor unit of the air conditioner in the heating mode can refer to the control process in the cooling mode in the foregoing embodiments, and details are not described here.

S103. Obtain the second indoor temperature and the operating frequency of the compressor in the indoor area after the set time interval;

In this embodiment, the manner of obtaining the second indoor temperature may refer to the steps related to the first indoor temperature in the aforementioned step S101 , which will not be repeated here.

For the aforementioned embodiment of one-to-one household air conditioner models, the current operating frequency of the air conditioner compressor is acquired in step S103.

For the embodiment of a commercial air conditioner model, the air conditioner obtains the operating frequency of each compressor in the enabled state. In this way, the air conditioner can obtain an operating frequency through a calculation process such as weighted calculation of the operating frequencies of multiple compressors. The mean value of is about to be used as the running frequency parameter in step S103.

Generally, after the outdoor fan of the air conditioner runs at the first wind speed of the outdoor unit for the above-mentioned set time interval, the pressure in the air conditioning system becomes stable. At this time, if the outdoor fan of the air conditioner is still running at the first wind speed of the outdoor unit, then It will not match the current heat exchange demand of the air conditioner. Therefore, the present invention recalculates and determines the second outdoor unit wind speed of the outdoor fan according to the re-detected indoor temperature and the operating frequency of the compressor, and adjusts the outdoor fan from the first outdoor unit wind speed to the second outdoor unit wind speed, so that the outdoor The wind speed of the fan can be adapted to the stable pressure state under the current working conditions, which reduces the extra power consumption of the air conditioner and improves the overall operating performance of the air conditioner.

S104. Determine and control the outdoor fan to run at the second outdoor fan speed according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency.

In this embodiment, the target indoor temperature is the target indoor temperature in the aforementioned step S102.

In one embodiment, when the operation mode is cooling mode, in step 104, according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency, determine and control the outdoor fan to run at the second outdoor fan speed , which mainly includes:

When the second temperature difference is greater than the third temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed;

When the second temperature difference is less than the third temperature difference threshold, the wind speed of the second external unit should be determined according to the operating frequency;

Among them, according to the operating frequency, determining the wind speed of the second external unit includes:

When the operating frequency is greater than or equal to the first frequency threshold, it is determined that the wind speed of the second external unit is a stroke wind speed;

When the operating frequency is less than the first frequency threshold, it is determined that the wind speed of the second outdoor unit is a low wind speed.

In this implementation, the third temperature difference threshold is a threshold parameter preset by the air conditioner. Preferably, the third temperature difference threshold is 1.5°C to 2.5°C.

The first frequency threshold is a threshold parameter preset by the air conditioner. Preferably, the value range of the first frequency threshold is 70-80 Hz.

In another optional embodiment, similar to the foregoing embodiments, when the operation mode is the heating mode, in step S104 according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency, Determine and control the outdoor fan to run at the second outdoor fan speed, which specifically includes:

When the second temperature difference is greater than the fourth temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed;

When the second temperature difference is less than the fourth temperature difference threshold, according to the operating frequency, determine the second external unit wind speed;

Among them, according to the operating frequency, determining the wind speed of the second external unit includes:

When the operating frequency is greater than or equal to the second frequency threshold, it is determined that the wind speed of the second external unit is a stroke wind speed;

When the operating frequency is less than the second frequency threshold, it is determined that the second outdoor unit wind speed is low wind speed.

In this implementation, the fourth temperature difference threshold is a threshold parameter preset by the air conditioner. Preferably, the fourth temperature difference threshold is 1.5°C to 2.5°C.

The second frequency threshold is a threshold parameter preset by the air conditioner. Preferably, the value range of the first frequency threshold is 70-80 Hz.

Similarly, the speed or gear position of the outdoor fan corresponding to the wind speed of the second outdoor unit after determination can be set with reference to the speed or gear position corresponding to the wind speed of the first outdoor unit in step S102 in the foregoing embodiment, and details are not repeated here. .

In this embodiment, the time interval is set to be no less than 3 minutes, that is, the time for which the outdoor fan of the air conditioner needs to run at the first wind speed of the outdoor unit is no less than 3 minutes. Stability of operation.

Fig. 2 is a flow chart of the control method of the present invention according to an exemplary embodiment. In the application scenario shown in Fig. 2, the adjustment of the speed of the outdoor fan when the household air conditioner is turned on is specifically explained.

S201, the air conditioner starts to run;

S202. Detecting the first indoor temperature Tn1;

In this embodiment, the indoor unit is provided with a temperature sensor, which can be used to detect the ambient temperature of the indoor area where the indoor unit is located, that is, the first indoor temperature Tn1 in step S202 can be detected by the temperature sensor;

S203. Determine the operating mode of the air conditioner. If it is the cooling mode, execute step S204. If it is the heating mode, execute step S220;

In another embodiment, the process of judging the operation mode of the air conditioner in step S203 can also be judged after the air conditioner is turned on and running, and then the indoor temperature detection step in step S202 is performed, the present invention is not limited thereto;

S204. Obtain the target indoor temperature input by the user;

S205. Calculate and determine the absolute value of the first cooling temperature difference Tnc1 between the first indoor temperature and the target indoor temperature;

S206, judging whether Tnc1 is greater than 2°C, if yes, execute step S208, if not, execute step S207;

In step S206, 2°C is the first temperature difference threshold;

S207, judging whether Tn is less than or equal to 2°C and greater than 0°C, if yes, execute step S209, if not, execute step S210;

In step S207, 2°C is the first temperature difference threshold, and 0°C is the second temperature difference threshold;

S208. The outdoor fan operates at the high wind speed as the first outdoor machine wind speed, and counts the time, and executes step S211;

S209. The outdoor fan runs at the middle wind speed as the first outdoor machine wind speed, and counts the time, and executes step S211;

S210, the outdoor fan operates at the low wind speed as the first outdoor machine wind speed, and counts the time, and executes step S211;

S211. Determine whether the timing is greater than 3 minutes, if yes, execute step S212, if no, the air conditioner still maintains the operation at the first wind speed of the outdoor unit;

In step S211, 3min is the set time interval;

S212. Detect the second indoor temperature Tn2;

S213. Obtain the operating frequency f of the compressor;

S214. Calculate and determine the absolute value of the second cooling temperature difference Tnc2 between the second indoor temperature and the target indoor temperature;

S215, judging whether Tnc2 is greater than 2°C, if yes, execute step S217, if not, execute step S216;

In step S215, 2°C is the third temperature difference threshold;

S216, judging whether f is greater than or equal to 80Hz, if yes, execute step S218, if not, execute step S219;

In step S216, 80Hz is the first frequency threshold;

S217. The outdoor fan operates at the high wind speed as the second outdoor machine wind speed, and the process ends;

S218. The outdoor fan operates at the middle wind speed as the second outdoor machine wind speed, and the process ends;

S219, the outdoor fan operates at the low wind speed as the second outdoor machine wind speed, and the process ends;

S220. Obtain the target indoor temperature input by the user;

S221. Calculate and determine the absolute value of the first heating temperature difference Tnc3 between the first indoor temperature and the target indoor temperature;

S222. Determine whether Tnc3 is greater than 2°C, if yes, execute step S224, if not, execute step S223;

In step S222, 2°C is the first temperature difference threshold;

S223, judging whether Tnc3 is less than or equal to 2°C and greater than 0°C, if yes, execute step S225, if not, execute step S226;

In step S223, 2°C is the first temperature difference threshold, and 0°C is the second temperature difference threshold;

S224. The outdoor fan operates at the high wind speed as the first outdoor machine wind speed, and counts the time, and executes step S211;

S225. The outdoor fan operates at the middle wind speed as the first outdoor machine wind speed, and counts the time, and executes step S227;

S226. The outdoor fan operates at the low wind speed as the first outdoor machine wind speed, and counts the time, and executes step S211;

S227. Determine whether the timing is greater than 3 minutes. If yes, execute step S228. If not, the air conditioner still maintains the operation at the first wind speed of the outdoor unit;

In step S227, 3min is the set time interval;

S228. Detect the second indoor temperature Tn2;

S229. Obtain the operating frequency f of the compressor;

S230. Calculate and determine the absolute value of the second heating temperature difference Tnc4 between the second indoor temperature and the target indoor temperature;

S231, judging whether Tnc4 is greater than 2°C, if yes, execute step S233, if not, execute step S232;

In step S231, 2°C is the fourth temperature difference threshold;

S232, judging whether f is greater than or equal to 80Hz, if yes, then execute step S234, if no, then execute step S235;

In step S232, 80Hz is the second frequency threshold;

S233. The outdoor fan operates at the high wind speed as the second outdoor machine wind speed, and the process ends;

S234. The outdoor fan operates at the middle wind speed as the second outdoor machine wind speed, and the process ends;

S235. The outdoor fan operates at the low wind speed as the second outdoor machine wind speed, and the process ends.

In addition, most of the speed control methods of the outdoor fans of existing air-conditioning products use the outdoor ambient temperature as a calculation parameter, and the above-mentioned steps of the present invention do not involve the acquisition and application of the outdoor ambient temperature, so the control method of the present invention can also Applied to the speed control of the outdoor fan of the air conditioner without an outdoor ambient temperature sensor installed, or it can also be applied to the speed control of the outdoor fan of the air conditioner with an outdoor ambient temperature sensor failure, and can ensure that the air conditioner lacks the outdoor ambient temperature parameter Under such circumstances, the normal operation of the outdoor fan can still be maintained.

Fig. 3 is a first structural block diagram of a control device according to an exemplary embodiment of the present invention.

As shown in Figure 3, the present invention provides a control device for the speed of the outdoor fan of the air conditioner, which can be used to control and adjust the speed of the outdoor fan of the air conditioner by applying the control method flow in the above embodiment. Specifically, the control device includes :

The first acquiring module 310 is configured to acquire the first indoor temperature of the indoor area where the air conditioner is located;

In an embodiment of the present invention, the control device is applied to an air conditioner, and the air conditioner is provided with a temperature sensor for detecting the indoor ambient temperature. The first acquisition module 310 acquires the indoor ambient temperature detected by the temperature sensor, and converts it to as the first indoor temperature of the indoor area where the air conditioner is located;

The first main control module 320 is configured to determine and control the outdoor fan to run at the first outdoor fan speed according to the first temperature difference between the first indoor temperature and the target indoor temperature;

The second acquiring module 330 is configured to acquire the second indoor temperature and the operating frequency of the compressor in the indoor area after the set time interval;

In this embodiment, the manner of obtaining the second indoor temperature by the second obtaining module 330 is the same as that of the first obtaining module 310, that is, obtaining the indoor ambient temperature detected by the temperature sensor after a set time interval;

The second main control module 340 is configured to determine and control the outdoor fan to run at the second outdoor fan speed according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency.

The control device of the present invention aims at the unstable state and the stable state when the air conditioner is turned on, and accurately controls the wind speed of the outdoor unit in both states, reduces the influence of the instantaneous pressure difference of the system on the air conditioning system, and improves the stability of the system operation.

Fig. 4 is a second structural block diagram of the control device of the present invention according to an exemplary embodiment.

As shown in Figure 4, the present invention provides a control device for the speed of the outdoor fan of the air conditioner. The control device can be used to control and adjust the speed of the outdoor fan of the air conditioner by applying the control method flow in the above embodiment. Specifically, the control device mainly It includes a first acquisition module 410 , a first main control module 420 , a second acquisition module 430 and a second main control module 440 .

In this embodiment, the first obtaining module 310 is configured to obtain the first indoor temperature of the indoor area where the air conditioner is located.

In this embodiment, the control device further includes a determination module 450, and the determination module 450 is used to determine the operating mode of the air conditioner, wherein the operating mode includes cooling mode and heating mode; when the operating mode is cooling mode, the first temperature difference is the first cooling temperature difference obtained by subtracting the target indoor temperature from the first indoor temperature, and the second temperature difference is the second cooling temperature difference obtained by subtracting the target indoor temperature from the second indoor temperature; the operating mode is heating mode , the first temperature difference is the first heating temperature difference obtained by subtracting the first indoor temperature from the target indoor temperature, and the second temperature difference is the second heating temperature obtained by subtracting the second indoor temperature from the target indoor temperature.

In this embodiment, the first main control module 420 includes a first main control sub-module 421 and a second main control sub-module 422 .

Wherein, when the operation mode is cooling mode, the first main control sub-module 421 is used for:

When the first cooling temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed;

When the first cooling temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the wind speed of the first outdoor unit is a stroke wind speed;

When the first cooling temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is low wind speed.

When the operation mode is heating mode, the second main control sub-module 422 is used for:

When the first heating temperature difference is greater than the first temperature difference threshold, the first outdoor unit wind speed is high wind speed;

When the first heating temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the wind speed of the first outdoor unit is a stroke wind speed;

When the first heating temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is low wind speed.

Preferably, the aforementioned determining module 450 determines the operating mode of the air conditioner after the first main control sub-module 421 or the second main control sub-module 422 determines and Before controlling the outdoor fan to run at the first outdoor fan speed.

In this embodiment, the second acquiring module 430 is configured to acquire the second indoor temperature and the running frequency of the compressor in the indoor area after a set time interval.

In this embodiment, the second main control module 440 includes a third main control submodule 441; when the operation mode is cooling mode, the third main control submodule 441 is used for:

When the second temperature difference is greater than the third temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed;

When the second temperature difference is smaller than the third temperature difference threshold, a second wind speed of the external unit is determined according to the operating frequency.

Specifically, the third main control sub-module 441 determines the second outdoor machine wind speed according to the operating frequency, including: when the operating frequency is greater than or equal to the first frequency threshold, determining that the second outdoor machine wind speed is a stroke wind speed; When a frequency threshold is reached, it is determined that the wind speed of the second external unit is low wind speed.

In this embodiment, the second main control module 440 includes a fourth main control submodule 442; when the operating mode is the heating mode, the fourth main control submodule 442 is used for:

When the second temperature difference is greater than the fourth temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed;

When the second temperature difference is smaller than the fourth temperature difference threshold, according to the operating frequency, the second wind speed of the external unit is determined.

Specifically, the fourth main control submodule 442 determines the second outdoor machine wind speed according to the operating frequency, including: when the operating frequency is greater than or equal to the second frequency threshold, determining that the second outdoor machine wind speed is a stroke wind speed; When the second frequency threshold is reached, it is determined that the wind speed of the second outdoor unit is low wind speed.

In this embodiment, the set time interval is not less than 3 minutes.

It should be understood that the present invention is not limited to the processes and structures that have been described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. A control method for an air-conditioning outdoor fan, characterized in that it comprises: Obtaining the first indoor temperature of the indoor area where the air conditioner is located; According to the first temperature difference between the first indoor temperature and the target indoor temperature, determine and control the outdoor fan to run at a first outdoor fan speed; Acquiring the second indoor temperature and the operating frequency of the compressor in the indoor area after a set time interval; According to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency, determine and control the operation of the outdoor fan at a second outdoor fan speed. 2. The control method according to claim 1, characterized in that, according to the first temperature difference between the first indoor temperature and the target indoor temperature, the outdoor fan is determined and controlled to operate at the first outdoor fan speed. Before running, the control method further includes: determining the operation mode of the air conditioner, wherein the operation mode includes a cooling mode and a heating mode; When the operation mode is the cooling mode, the first temperature difference is a first cooling temperature difference obtained by subtracting the target indoor temperature from the first indoor temperature, and the second temperature difference is The second cooling temperature difference obtained by subtracting the target indoor temperature from the second indoor temperature; when the operation mode is the heating mode, the first temperature difference is the target indoor temperature minus The first heating temperature difference obtained from the first indoor temperature, and the second temperature difference is a second heating temperature obtained by subtracting the second indoor temperature from the target indoor temperature. 3. The control method according to claim 2, characterized in that, When the operation mode is the cooling mode, the determining and controlling the outdoor fan to operate at the first outdoor fan speed according to the first temperature difference between the first indoor temperature and the target indoor temperature includes: when When the first cooling temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed; when the first cooling temperature difference is smaller than the first temperature difference threshold and greater than or equal to the second When the temperature difference threshold is reached, the wind speed of the first outdoor unit is a medium wind speed; when the first cooling temperature difference is smaller than the second temperature difference threshold, the wind speed of the first outdoor unit is a low wind speed; When the operation mode is the heating mode, determining and controlling the outdoor fan to operate at a first outdoor fan speed according to the first temperature difference between the first indoor temperature and the target indoor temperature includes: When the first heating temperature difference is greater than the first temperature difference threshold, the wind speed of the first outdoor unit is high wind speed; when the first heating temperature difference is smaller than the first temperature difference threshold and greater than or When it is equal to the second temperature difference threshold, the wind speed of the first outdoor unit is a medium wind speed; when the first heating temperature difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is a low wind speed. 4. The control method according to claim 3, characterized in that, When the operation mode is the cooling mode, according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operation frequency, determine and control the operation of the outdoor fan at a second outdoor wind speed ,include: When the second temperature difference is greater than a third temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed; When the second temperature difference is less than a third temperature difference threshold, determining the second outdoor unit wind speed according to the operating frequency includes: When the operating frequency is greater than or equal to the first frequency threshold, it is determined that the wind speed of the second outdoor unit is a stroke wind speed; When the operating frequency is less than the first frequency threshold, it is determined that the wind speed of the second external unit is a low wind speed. 5. The control method according to claim 3, characterized in that, When the operating mode is the heating mode, according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency, determine and control the outdoor fan to operate at a second outdoor fan speed run, including: When the second temperature difference is greater than a fourth temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed; When the second temperature difference is smaller than the fourth temperature difference threshold, determining the second outdoor unit wind speed according to the operating frequency includes: When the operating frequency is greater than or equal to a second frequency threshold, it is determined that the wind speed of the second external machine is a stroke wind speed; When the operating frequency is less than the second frequency threshold, it is determined that the wind speed of the second external unit is a low wind speed. 6. A control device for an outdoor fan of an air conditioner, comprising: The first obtaining module is used to obtain the first indoor temperature of the indoor area where the air conditioner is located; The first main control module is configured to determine and control the outdoor fan to run at a first outdoor fan speed according to the first temperature difference between the first indoor temperature and the target indoor temperature; The second acquisition module is used to acquire the second indoor temperature and the operating frequency of the compressor in the indoor area after a set time interval; The second main control module is configured to determine and control the outdoor fan to operate at a second outdoor fan speed according to the second temperature difference between the second indoor temperature and the target indoor temperature and the operating frequency. 7. The control device according to claim 6, characterized in that, the control method further comprises a determination module, the determination module is used to determine the temperature according to the first indoor temperature and the target indoor temperature in the first main control module. Before determining and controlling the outdoor fan to operate at the first outdoor unit wind speed, determine the operation mode of the air conditioner, wherein the operation mode includes a cooling mode and a heating mode; When the operation mode is the cooling mode, the first temperature difference is a first cooling temperature difference obtained by subtracting the target indoor temperature from the first indoor temperature, and the second temperature difference is The second cooling temperature difference obtained by subtracting the target indoor temperature from the second indoor temperature; when the operation mode is the heating mode, the first temperature difference is the target indoor temperature minus The first heating temperature difference obtained from the first indoor temperature, and the second temperature difference is a second heating temperature obtained by subtracting the second indoor temperature from the target indoor temperature. 8. The control device according to claim 7, wherein the first main control module comprises a first main control sub-module and a second main control sub-module, wherein, When the operation mode is the cooling mode, the first main control submodule is configured to: when the first cooling temperature difference is greater than a first temperature difference threshold, the wind speed of the first outdoor unit is a high wind speed ; when the first cooling temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the wind speed of the first outdoor unit is a stroke wind speed; when the first cooling temperature difference is less than the set When the second temperature difference threshold is specified, the wind speed of the first external unit is low wind speed; When the operation mode is the heating mode, the second main control submodule is configured to: when the first heating temperature difference is greater than a first temperature difference threshold, the wind speed of the first outdoor unit is high Wind speed; when the first heating temperature difference is less than the first temperature difference threshold and greater than or equal to the second temperature difference threshold, the first outdoor unit wind speed is a middle wind speed; when the first heating temperature When the difference is smaller than the second temperature difference threshold, the first outdoor unit wind speed is a low wind speed. 9. The control device according to claim 8, wherein the second main control module comprises a third main control sub-module, and the third main control sub-module is used to control the refrigeration in the operation mode. mode, When the second temperature difference is greater than a third temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed; When the second temperature difference is less than a third temperature difference threshold, determining the second outdoor unit wind speed according to the operating frequency includes: When the operating frequency is greater than or equal to the first frequency threshold, it is determined that the wind speed of the second outdoor unit is a stroke wind speed; When the operating frequency is less than the first frequency threshold, it is determined that the wind speed of the second external unit is a low wind speed. 10. The control device according to claim 8, characterized in that, the second main control module comprises a fourth main control sub-module, and the fourth main control sub-module is used for controlling In hot mode: When the second temperature difference is greater than a fourth temperature difference threshold, it is determined that the wind speed of the second external unit is a high wind speed; When the second temperature difference is smaller than the fourth temperature difference threshold, determining the second outdoor unit wind speed according to the operating frequency includes: When the operating frequency is greater than or equal to a second frequency threshold, it is determined that the wind speed of the second external machine is a stroke wind speed; When the operating frequency is less than the second frequency threshold, it is determined that the wind speed of the second external unit is a low wind speed.