CN114811909A - Control method, device, equipment and medium for fan of indoor heat exchanger of air conditioner - Google Patents

Abstract

The invention relates to the technical field of air conditioners, and particularly provides a fan control method of an indoor heat exchanger of an air conditioner, aiming at solving the problems of uneven shunting of all branches of the air conditioner, low utilization rate of an evaporator and serious resource waste. For this purpose, the indoor heat exchanger of the air conditioner of the invention includes the sectional type heat exchanger of the multistage heat exchange branch road, the first branch road port and second branch road port of every section of heat exchange branch road are connected with first pipeline port and second pipeline port of the indoor coolant circulation pipeline of the air conditioner respectively, there is a branch road fan respectively in the same side of every section of heat exchange branch road, the control method includes: after receiving an air conditioner operation instruction, determining the initial rotating speed of the branch fan according to the temperature difference between the actual temperature of the room and the set temperature of the room, and if the air conditioner operates in a refrigeration mode, adjusting the initial rotating speed of the branch fan of the lower section of the heat exchange branch with the largest temperature difference at the refrigerant outflow side of each two sections of the heat exchange branches; if the air conditioner operates in the heating mode, the initial rotating speed of the branch fan is kept unchanged.

Description

Control method, device, equipment and medium for fan of air-conditioning indoor heat exchanger

technical field

The present invention relates to the technical field of air conditioners, and in particular provides a control method, device, electronic device and computer-readable storage medium for a fan of an indoor heat exchanger of an air conditioner.

Background technique

At present, the global environment is deteriorating, and high temperature weather is becoming more and more frequent, which promotes the wide application of air-conditioning products. 1 is a schematic diagram of a fan control structure of an indoor heat exchanger of an air conditioner in the prior art, wherein the fan 1 ′ used in the air conditioner is an integral structure, and each heat exchange branch in the segmented heat exchanger 2 ′ is connected to The refrigerant pipeline 3' is connected. During the operation, the refrigerant runs the entire segmented heat exchanger 2'. The uneven distribution of the heat exchange branches in the segmented heat exchanger 2' is not easy to adjust, which is easy to cause refrigerant circulation, The utilization rate of the heat exchanger is low and the resource waste is serious.

Accordingly, there is a need in the art for a new control method for a fan of an indoor heat exchanger of an air conditioner to solve the above problems.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned defects, the present invention is proposed to provide a solution or at least partially solve the problem that the refrigerant runs the entire heat exchanger during the operation of the air conditioner, resulting in uneven distribution of each heat exchange branch, refrigerant circulation, low utilization rate of the heat exchanger and The control method, device, electronic device and storage medium of the fan of the air-conditioning indoor heat exchanger with serious technical problem of waste of resources.

In a first aspect, the present invention provides a fan control method for an air-conditioning indoor heat exchanger, wherein the air-conditioning indoor heat exchanger is a segmented heat exchanger including multiple heat exchange branches, and the first heat exchange branch of each heat exchange branch One branch port is respectively connected with the first pipeline port of the air-conditioning indoor refrigerant circulation pipeline, and the second branch port of each heat exchange branch is respectively connected with the second pipeline port of the air-conditioning indoor refrigerant circulation pipeline; A branch fan is respectively provided on the same side of the section heat exchange branch, and each branch fan is respectively used to provide air volume to each corresponding heat exchange branch; the fan control method includes the following steps: after receiving the air conditioner After the running command, according to the first temperature difference between the actual temperature of the room where the air conditioner is located and the set temperature of the room, determine the initial speed of the branch fan and control the air conditioner to start running according to the initial speed; during the operation of the air conditioner, if The air conditioner operates in cooling mode, obtains the second temperature difference of the refrigerant outflow side of each two heat exchange branches respectively, and takes the two heat exchange branches with the largest second temperature difference as the two target heat exchange branches; The initial speed of the branch fan of the target heat exchange branch of the lower temperature section makes the second temperature difference between the refrigerant outflow sides of the two target heat exchange branches smaller than the preset temperature threshold, so as to achieve the target heat exchange branch of the two sections The heat exchange is balanced; if the air conditioner operates in the heating mode, the initial rotational speed of the branch fan is maintained unchanged.

In a technical solution of the above-mentioned fan control method for an indoor heat exchanger of an air conditioner, the step of “determining the initial rotation speed of the branch fan according to the first temperature difference between the actual temperature of the room where the air conditioner is located and the set temperature of the room” is concrete. Including: dividing the numerical interval [0, N] into a plurality of continuous sub-intervals, each sub-interval corresponds to a different rotational speed coefficient, and the rotational speed coefficient is positively correlated with the interval maximum value of the sub-interval; obtaining the For the rotation speed coefficient of the sub-section where the first temperature difference is located, the product of the rotation speed coefficient and the preset fan reference rotation speed is used as the initial rotation speed of the branch fan.

In a technical solution of the above-mentioned fan control method for an indoor heat exchanger of an air conditioner, each sub-interval also corresponds to a different compressor frequency coefficient, and the compressor frequency coefficient is positively correlated with the interval maximum value of the sub-interval; The method further includes: acquiring the compressor frequency coefficient in the sub-section where the first temperature difference is located, using the product of the compressor frequency coefficient and the preset compressor reference speed as the operating frequency of the air conditioner compressor, and at the same time according to the The initial rotational speed and the operating frequency control the air conditioner to start running.

In one technical solution of the fan control method of the above-mentioned air-conditioning indoor heat exchanger, "respectively obtain the second temperature difference of the refrigerant outflow side of each two heat exchange branches, and divide the two heat exchange branches with the largest second temperature difference. As two target heat exchange branches; by increasing the initial speed of the branch fan of the lower temperature target heat exchange branch, the second temperature difference of the refrigerant outflow side of the two target heat exchange branches is less than the preset temperature The step specifically includes: dividing the value interval [0, M] into a plurality of continuous sub-intervals, each sub-interval corresponding to different rotational speed increments , the rotational speed increment is positively correlated with the interval maximum value of the sub-interval; the second temperature difference of the refrigerant outflow side of each two heat exchange branches is obtained at the same first preset time, and the second temperature difference The two largest heat exchange branches are used as two target heat exchange branches; it is judged whether the second temperature difference is greater than or equal to a preset temperature threshold; Taking the sum of the initial rotational speed of the branch fan of the target heat exchange branch with a lower temperature and the increase in the rotational speed as the target rotational speed of the branch fan of the target heat exchange branch with a lower temperature, and according to the The target rotational speed controls the air conditioner to continue to run; if not, the air conditioner is controlled to continue to run according to the initial rotational speed.

In a technical solution of the above-mentioned fan control method for an indoor heat exchanger of an air conditioner, if the air conditioner operates in a heating mode, the method further includes: detecting the refrigerant outflow of each heat exchange branch at the same second preset time. to obtain the highest temperature among the temperatures as the target superheat load temperature; determine whether the target superheat load temperature is greater than the preset superheat load temperature threshold; if so, reduce the operating frequency of the air conditioner compressor; if not, then Keep the operating frequency of the air conditioner compressor unchanged.

In a technical solution of the above-mentioned fan control method for an indoor heat exchanger of an air conditioner, during the operation of the air conditioner, the method further includes: detecting a first temperature difference between the actual temperature of the room and the set temperature of the room in real time, if When the first temperature difference is equal to zero, the air conditioner is controlled to stop running.

In a second aspect, the present invention provides a fan control device for an air-conditioning indoor heat exchanger. The air-conditioning indoor heat exchanger is a segmented heat exchanger including a plurality of heat exchange branches. One branch port is respectively connected with the first pipeline port of the air-conditioning indoor refrigerant circulation pipeline, and the second branch port of each heat exchange branch is respectively connected with the second pipeline port of the air-conditioning indoor refrigerant circulation pipeline; A branch fan is respectively provided on the same side of the section heat exchange branch, and each branch fan is respectively used to provide air volume to each corresponding heat exchange branch. The device includes: a fan speed determination module, which is configured After receiving the air conditioner operation command, determine the initial speed of the branch fan according to the first temperature difference between the actual temperature of the room where the air conditioner is located and the set temperature of the room, and control the air conditioner to start running according to the initial speed; The module is configured to obtain the second temperature difference of the refrigerant outflow side of each two heat exchange branches respectively when the air conditioner operates in the cooling mode during the operation of the air conditioner, and divide the two heat exchange branches with the largest second temperature difference. By increasing the initial speed of the branch fan of the target heat exchange branch with a lower temperature, the second temperature difference of the refrigerant outflow side of the two target heat exchange branches is smaller than the predetermined temperature difference. A temperature threshold is set to achieve a balance of heat exchange between the two target heat exchange branches; if the air conditioner operates in a heating mode, the initial rotational speed of the branch fan is maintained unchanged.

In a third aspect, there is provided an electronic device comprising a processor and storage means, the storage means being adapted to store a plurality of pieces of program code, the program code being adapted to be loaded and run by the processor to execute the above The fan control method for an air-conditioning indoor heat exchanger according to any one of the technical solutions of the fan control method for an air-conditioning indoor heat exchanger.

In a fourth aspect, a computer-readable storage medium is provided, the computer-readable storage medium having stored therein a plurality of program codes, the program codes being adapted to be loaded and executed by a processor to execute the fan of the above-mentioned air-conditioning indoor heat exchanger The fan control method of the indoor heat exchanger of the air conditioner according to any one of the technical solutions of the control method.

In a fifth aspect, an air conditioner is provided, wherein the air-conditioning indoor heat exchanger in the air conditioner is a segmented heat exchanger including multiple heat exchange branches, and the first branch ports of each heat exchange branch are respectively It is connected with the first pipeline port of the refrigerant circulation pipeline in the air-conditioning indoor, and the second branch port of each heat exchange branch is respectively connected with the second pipeline port of the refrigerant circulation pipeline in the air-conditioning indoor; A branch fan is respectively set on the same side of the air conditioner, and each branch fan is used to provide air volume to each corresponding heat exchange branch; the air conditioner includes the technical scheme of the fan control device of the above-mentioned air conditioner indoor heat exchanger The fan control device of the indoor heat exchanger of the air conditioner or the electronic device described in the technical solution of the electronic device.

The above-mentioned one or more technical solutions of the present invention have at least one or more of the following beneficial effects:

In the implementation of the technical solution of the present invention, the indoor heat exchanger of the air conditioner is set as a segmented heat exchanger with multiple heat exchange branches, and the first branch port of each heat exchange branch is respectively in circulation with the refrigerant in the air conditioner indoor. The first pipeline port of the pipeline is connected, and the second branch port of each heat exchange branch is respectively connected to the second pipeline port of the refrigerant circulation pipeline in the air-conditioning room, and at the same time, the same side of each heat exchange branch is respectively connected. A branch fan is provided, each branch fan is used to provide air volume to each corresponding heat exchange branch, and the wind speed of each branch fan can be flexibly controlled to adjust the heat exchange of the segmented heat exchanger. The heat exchange or heat exchange efficiency between the refrigerant in the branch and the indoor air effectively improves the utilization rate of each heat exchange branch in the segmented heat exchanger, greatly saves electricity resources, and ensures the refrigeration of the air conditioner. / or heating effect; in addition, when the air conditioner is operating in the cooling mode, the temperature difference of the refrigerant outflow side of each two heat exchange branches is obtained respectively, and the two heat exchange branches with the largest temperature difference are used as the two target heat exchange branches. By increasing the initial speed of the branch fan of the target heat exchange branch with a lower temperature, the temperature difference between the refrigerant outflow sides of the two target heat exchange branches is less than the preset temperature threshold, which can effectively control the two sections. The heat exchange of the target heat exchange branch is balanced, which further improves the utilization rate of the segmented heat exchanger, and greatly reduces the problem of refrigerant circulation and serious waste of resources caused by uneven distribution of each branch.

Description of drawings

The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. Those skilled in the art can easily understand that these drawings are only for the purpose of illustration and are not intended to limit the protection scope of the present invention. In addition, like numerals in the figures are used to designate like parts, where:

1 is a schematic diagram of a fan control structure of an air-conditioning indoor heat exchanger in the prior art;

2 is a schematic diagram of the fan control structure of the air-conditioning indoor heat exchanger of the present invention;

3 is a schematic flow chart of main steps of a fan control method for an indoor heat exchanger of an air conditioner according to an embodiment of the present invention;

4 is a schematic flow chart of main steps of a fan control method for an indoor heat exchanger of an air conditioner according to another embodiment of the present invention;

FIG. 5 is a schematic block diagram of the main structure of a fan control device for an indoor heat exchanger of an air conditioner according to an embodiment of the present invention.

List of reference numbers :

Figure 1: 1'-fan, 2'-segmented heat exchanger, 3'-refrigerant pipeline connected to each heat exchange branch in segmented heat exchanger 2';

Figure 2: 1-branch fan, 2-segment heat exchanger, 3-refrigerant pipeline connected to each heat exchange branch in segmented heat exchanger 2;

Figure 3: 11: Fan speed determination module; 12: Fan control module.

Detailed ways

Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

In the description of the present invention, "module" and "processor" may include hardware, software or a combination of both. A module may include hardware circuits, various suitable sensors, communication ports, memory, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-transitory computer-readable storage media include any suitable media that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random-access memory, and the like.

It should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "comprising" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The air-conditioning indoor heat exchanger in the embodiment of the present invention includes a segmented heat exchanger with multiple heat exchange branches, and the first branch port of each heat exchange branch is respectively connected with the first pipeline of the air-conditioning indoor refrigerant circulation pipeline. Port connection, the second branch port of each heat exchange branch is respectively connected with the second pipeline port of the refrigerant circulation pipeline in the air-conditioning room; a branch fan is respectively arranged on the same side of each heat exchange branch, and each The branch fans are respectively used to provide air volume to each corresponding heat exchange branch. As shown in FIG. 2 , in an embodiment according to the embodiment of the present invention, the indoor heat exchanger of the air conditioner includes three heat exchange branches, and the first branch ports of each heat exchange branch are respectively connected with the refrigerant circulation pipes in the air conditioner indoor. The first pipeline port of the circuit 3, the second branch port of each heat exchange branch are respectively the second pipeline port of the refrigerant circulation pipeline 3 in the air-conditioning room. The fan of the indoor heat exchanger of the air conditioner includes three branch fans 1, and each branch fan 1 is respectively arranged on the left side of each heat exchange branch.

The following describes the fan control method of the air-conditioning indoor heat exchanger of the present invention with reference to FIG. 3 .

Referring to FIG. 3 , FIG. 3 is a schematic flow chart of main steps of a fan control method for an indoor heat exchanger of an air conditioner according to an embodiment of the present invention. As shown in FIG. 3, the fan control method for the indoor heat exchanger of the air conditioner mainly includes the following steps S101-S103:

Step S101: After receiving the air conditioner operation instruction, determine the initial speed of the branch fan according to the first temperature difference between the actual room temperature of the room where the air conditioner is located and the room set temperature, and control the air conditioner to start running according to the initial speed.

In this embodiment, the actual temperature of the room in the room where the air conditioner is located is obtained through the temperature sensor, and the first temperature difference is obtained according to the difference between the actual temperature of the room and the set temperature of the room.

The room set temperature may be a temperature preset by a user according to actual needs, or a temperature obtained after the user adjusts the set temperature according to needs, which is not limited in this embodiment of the present invention.

In one embodiment, the numerical interval [0, N] can be divided into a plurality of continuous sub-intervals in advance, and each sub-interval corresponds to a different rotational speed coefficient and a compressor frequency coefficient respectively, and matches the sub-interval to which the first temperature difference belongs, and obtain the speed coefficient and compressor frequency coefficient of the sub-section where the first temperature difference is located, and then use the product of the speed coefficient and the preset fan reference speed as the initial speed of the branch fan, and compare the compressor frequency coefficient with the preset compressor frequency coefficient. The product of the reference speed is used as the operating frequency of the air conditioner compressor, and the air conditioner is controlled to start running according to the initial speed and the operating frequency.

For example: If the value interval [0, 10] is divided into 4 consecutive sub-intervals in advance, the preset fan base speed is 1100r/min, and the preset compressor base speed is 80Hz. The corresponding relationship between the numerical range, fan speed coefficient and compressor frequency coefficient can be obtained through sub-intervals to obtain the speed coefficient and compressor frequency coefficient:

subinterval Value range(℃) fan speed factor Compressor frequency coefficient first subinterval 0 0.2 0.2 second subinterval 1 to 4 0.4 0.4 third subinterval 5 to 9 0.6 0.6 the fourth subinterval ≥10 1 1

When the first temperature difference between the room temperature set by the user and the actual room temperature is 8°C, the third sub-interval to which the first temperature difference belongs can be obtained, then the fan speed coefficient is 0.6, and the compressor frequency coefficient is 0.6, then The initial speed of the branch fan is 1100×0.6=660r/min, and the operating frequency of the compressor is 80×0.6=48Hz, that is, when the first temperature difference between the room temperature set by the user and the actual room temperature is 8°C, the control The branch fan of the air conditioner operates according to the initial speed of 660r/min, and the operating frequency of the compressor is 48Hz.

It should be noted that the preset fan base speed and the preset compressor base speed can both be the fan base speed and the compressor base speed preset by the user based on experience data, or they can be the user's preset fan base speed as needed. The reference rotational speed of the fan and the reference rotational speed of the compressor obtained after being adjusted with the reference rotational speed of the compressor are not limited in this embodiment of the present invention.

Step S102: If the air conditioner operates in the cooling mode, obtain the second temperature difference of the refrigerant outflow side of each two heat exchange branches respectively, and use the two heat exchange branches with the largest second temperature difference as the two target heat exchange branches. , by increasing the initial rotation speed of the branch fan of the target heat exchange branch with a lower temperature, so that the second temperature difference between the refrigerant outflow sides of the two target heat exchange branches is smaller than the preset temperature threshold, so as to achieve the two-stage target The heat exchange of the heat exchange branch is balanced.

In this embodiment, the temperature value of the refrigerant outflow side of each heat exchange branch is obtained through a temperature sensor disposed on the refrigerant outflow side of each heat exchange branch, and the refrigerant outflow side of each two heat exchange branches is calculated. The second temperature difference, the two heat exchange branches with the largest second temperature difference are taken as the two target heat exchange branches.

In one embodiment, the value interval [0, M] may be divided into a plurality of consecutive sub-intervals in advance, each sub-interval corresponds to a different rotational speed increment, wherein the rotational speed increment is positively correlated with the interval maximum value of the sub-interval. Match the sub-interval to which the second temperature difference belongs, and obtain the increase in rotational speed of the sub-interval where the second temperature difference is located, and then sum the increase in rotational speed and the initial rotational speed of the branch fan of a target heat exchange branch with a lower temperature to obtain the target rotational speed At the same time, the air conditioner is controlled to continue to operate according to the target rotation speed, so that the second temperature difference on the refrigerant outflow side of the target heat exchange branch is less than the preset temperature threshold, so as to achieve the balance of heat exchange between the two target heat exchange branches.

For example: if the value interval [0, 8] is divided into 4 consecutive sub-intervals in advance, the preset fan base speed is 1100r/min, and the corresponding relationship between the sub-intervals, value ranges and fan value-added values in the following table can be obtained by Sub-interval to get speed increment:

subinterval Value range(℃) Speed increment (r/min) first subinterval <3 0 second subinterval 3 to 4 10 third subinterval 5～7 30 the fourth subinterval ≥8 50

When the temperature difference between the two target heat exchange branches with the largest second temperature difference is 8°C, the fourth sub-section to which the second temperature difference belongs can be obtained, and the fan speed increment is 50 r/min, and the temperature is lower The target speed of the branch fan of the first target heat exchange branch is 1100+50=1150r/min, that is, when the temperature difference between the two target heat exchange branches with the second largest temperature difference is 8°C, the control temperature is lower. The branch fan of a target heat exchange branch runs according to the target speed of 1150r/min.

It should be noted that the preset reference fan speed may be the reference speed of the fan preset by the user based on experience data, or may be the reference speed of the fan obtained after the user adjusts the set reference speed of the fan as required. No restrictions apply.

Step S103: If the air conditioner operates in the heating mode, keep the initial rotational speed of the branch fan unchanged.

Based on the above steps S101-S103, the indoor heat exchanger of the air conditioner is set as a segmented heat exchanger with multiple heat exchange branches, and the first branch port of each heat exchange branch is respectively connected with the indoor refrigerant circulation pipe of the air conditioner. The first pipeline port of each heat exchange branch is connected to the second pipeline port of the air-conditioning indoor refrigerant circulation pipeline respectively, and at the same time, the same side of each heat exchange branch is set separately. There is a branch fan, each branch fan is used to provide air volume to each corresponding heat exchange branch, and the wind speed of each branch fan can be flexibly controlled to adjust each heat exchange branch of the segmented heat exchanger. It can effectively improve the utilization rate of the segmented heat exchanger, greatly save electricity resources, and ensure the cooling/or heating effect of the air conditioner at the same time; , when the air conditioner is running in the cooling mode, the temperature difference between the refrigerant outflow sides of each two heat exchange branches is obtained respectively, and the two heat exchange branches with the largest temperature difference are used as the two target heat exchange branches. The low initial speed of the branch fan of the first target heat exchange branch makes the temperature difference between the refrigerant outflow sides of the two target heat exchange branches less than the preset temperature threshold, which can effectively control the exchange of the two target heat exchange branches. The heat is balanced, which further improves the utilization rate of the segmented heat exchanger, and greatly reduces the problem of serious waste of resources caused by the circulation of refrigerant caused by uneven distribution of each branch.

Referring to FIG. 4 , FIG. 4 is a schematic flowchart of main steps of a fan control method for an indoor heat exchanger of an air conditioner according to another embodiment of the present invention. As shown in FIG. 4 , the fan control method for the indoor heat exchanger of the air conditioner in the embodiment of the present invention mainly includes the following steps S201 to S2823.

Step S201 : after receiving the air conditioner operation instruction, detect in real time the first temperature difference between the room actual temperature and the room set temperature in the room where the air conditioner is located.

In this embodiment, the actual temperature of the room in the room where the air conditioner is located is detected in real time by the temperature sensor.

The room set temperature can be the user's input of the room set temperature on the operation panel of the air conditioner, or the user's input of the room set temperature on the APP connected by the air conditioner and the mobile terminal through a wireless connection such as Bluetooth or WiFi, or the user can enter the room set temperature. The room set temperature is input through the remote control, which is not limited in this embodiment of the present invention.

Step S202: Determine whether the first temperature difference is equal to zero, if so, execute step S203; if not, execute step S204.

Step S203: Control the air conditioner to stop running.

In this embodiment, if the first temperature difference is equal to zero, it is determined that the room temperature of the room where the air conditioner is located reaches the standard, and the air conditioner stops running until the first temperature difference is greater than zero, and the air conditioner is controlled to execute step S204.

Step S204: Divide the numerical interval [0, N] into a plurality of continuous sub-intervals, each sub-interval corresponds to a different rotational speed coefficient and a different compressor frequency coefficient, and the interval maximum value of the sub-interval is respectively the same as the rotational speed coefficient and the compression factor. The frequency coefficient of the machine is positively correlated.

In this embodiment, in step S204, the interval maximum value of the sub-interval is positively correlated with the rotational speed coefficient and the compressor frequency coefficient, that is, the larger the interval maximum value of the sub-interval is, the larger the corresponding rotational speed coefficient is, and the corresponding compression The larger the frequency coefficient of the compressor, the smaller the maximum value of the sub-interval, the smaller the corresponding rotational speed coefficient, and the smaller the corresponding compressor frequency coefficient. Both the rotational speed coefficient and the compressor frequency coefficient may be the rotational speed coefficient and the compressor frequency coefficient preset by those skilled in the art based on empirical data, or may be the rotational speed coefficient and the compressor frequency coefficient that have been set by those skilled in the art according to actual needs. The rotational speed coefficient and the compressor frequency coefficient obtained after adjustment are not limited in this embodiment of the present invention.

The numerical interval [0, N] can be a numerical interval preset by a person skilled in the art based on empirical data, or a numerical interval obtained by a person skilled in the art after adjusting the set numerical interval according to actual needs, the embodiment of the present invention There is no restriction on this.

Step S205: obtaining the rotational speed coefficient of the sub-section where the first temperature difference is located, and using the product of the rotational speed coefficient and the preset reference rotational speed as the initial rotational speed of the branch fan;

Step S206: Obtain the compressor frequency coefficient in the sub-section where the first temperature difference is located, and use the product of the compressor frequency coefficient and the preset compressor reference speed as the operating frequency of the air conditioner compressor.

Step S207: Control the air conditioner to start running according to the initial rotational speed and the operating frequency.

It should be noted that, in steps S205 to S206, both the preset reference speed and the preset compressor reference speed may be the reference speed and the compressor reference speed preset by those skilled in the art based on empirical data, or both may be The reference rotational speed and the compressor reference rotational speed are obtained by those skilled in the art after adjusting the set reference rotational speed and the compressor reference rotational speed according to actual needs, which are not limited in the embodiment of the present invention. The preset reference rotational speed may be in the range of 200 r/min to 2000 r/min, and the preset compressor reference rotational speed may be in the range of 10 Hz to 100 Hz. Preferably, the preset reference speed of the embodiment of the present invention is 1100 r/min, and the preset reference speed of the compressor is 80 Hz.

Further, in steps S204 to S207, according to the corresponding relationship between the sub-interval, the numerical range corresponding to the sub-interval, the rotational speed coefficient corresponding to the sub-interval, and the compressor frequency coefficient corresponding to the sub-interval, the sub-interval where the first temperature difference is located can be obtained. Then the product of the speed coefficient and the preset reference speed is used as the initial speed of the branch fan, and the product of the compressor frequency coefficient and the preset compressor reference speed is used as the air conditioner compressor. operating frequency, and control the air conditioner to start running according to the initial speed and operating frequency.

Based on the above steps S201 to S207, an example is given: the preset reference speed is set to 1100r/min, and the preset compressor reference speed is set to 80Hz; if the room temperature of the room obtained by the temperature sensor installed in the room where the air conditioner is located is 5 ℃, input the room temperature of the room through the remote control 18 ℃, and then calculate the first temperature difference according to the room temperature of the room and the room set temperature of the room, that is, the first temperature difference is 18-5=13 ℃ ; The sub-interval to which the first temperature difference belongs, as well as the corresponding rotational speed coefficient and compressor frequency coefficient of the sub-interval can be obtained through the correspondence between the sub-intervals, numerical ranges, rotational speed coefficients and compressor frequency coefficients in the following table:

subinterval Value range(℃) Speed factor Compressor frequency coefficient first subinterval 0 0.2 0.2 second subinterval 1 to 4 0.4 0.4 third subinterval 5 to 9 0.6 0.6 the fourth subinterval ≥10 1 1

When the first temperature difference is 13°C, it belongs to the fourth sub-section, the speed coefficient is 1, and the compressor frequency coefficient is 1, then the initial speed of the branch fan is the product of the speed coefficient and the preset reference speed, that is, the branch fan The initial speed of the fan is 1100×1=1100r/min; the operating frequency of the compressor is the product of the compressor frequency coefficient and the preset compressor reference speed, that is, the operating frequency of the compressor is 80×1=80Hz. The calculation methods of the initial rotational speed of the branch fan and the operating frequency of the compressor under the other first temperature difference values are the same as those described above, and will not be repeated here.

Step S208: Determine whether the air conditioner operates in the cooling mode or the heating mode. If the air conditioner is in the cooling mode, execute step S2810; if the air conditioner is in the heating mode, execute step S2820.

Step S2810: If the numerical interval [0, M] is divided into a plurality of continuous sub-intervals, each sub-interval corresponds to a different rotational speed increment, and the rotational speed increment is positively correlated with the interval maximum value of the sub-interval.

In this embodiment, the interval maximum value of the sub-interval is positively correlated with the rotational speed increment, that is, the larger the interval maximum value of the sub-interval is, the larger the corresponding rotational speed increment is, and the smaller the interval maximum value of the sub-interval is, the higher the corresponding rotational speed increment is. Small. The rotational speed increment may be a rotational speed increment preset by a person skilled in the art based on empirical data, or may be a rotational speed increment obtained by a person skilled in the art after adjusting the preset rotational speed increment according to actual needs, which is not limited in this embodiment of the present invention.

The numerical interval [0, M] can be a numerical interval preset by those skilled in the art based on empirical data, or can be a numerical interval obtained by those skilled in the art after adjusting the set numerical interval according to actual needs, the embodiment of the present invention There is no restriction on this.

Step S2811: Obtain the second temperature difference of the refrigerant outflow side of each two heat exchange branches at the same first preset time, and use the two heat exchange branches with the largest second temperature difference as the two target heat exchange branches. road.

In this embodiment of the present invention, the first preset time is used to determine a time boundary for acquiring the second temperature difference on the refrigerant outflow side of each two-stage heat exchange branch. The first preset time may be a time preset by a person skilled in the art based on empirical data, or may be a time obtained by a person skilled in the art after adjusting the set time according to actual needs, which is not limited in this embodiment of the present invention. The first preset time may include a range of 5 to 50 seconds, and may also include a range of 3 to 15 minutes. For example, the first preset time may be 5 seconds, 10 seconds, 15 seconds, 30 seconds, 40 seconds, 50 seconds, It can also be 3 minutes, 5 minutes, 10 minutes or 15 minutes. Preferably, in the embodiment of the present invention, the first preset time is 3 minutes.

In one embodiment, the temperature of the refrigerant outflow side of each heat exchange branch is obtained through a temperature sensor disposed on the refrigerant outflow side of each heat exchange branch at the same first preset time, and then the temperature of each two sections is calculated separately. The temperature difference of the refrigerant outflow side of the heat exchange branch is obtained, and the two heat exchange branches with the largest temperature difference are obtained as the two target heat exchange branches.

Step S2812: Determine whether the second temperature difference is greater than or equal to the preset temperature threshold, if yes, go to step S2813; if not, go to step S2814.

In this embodiment of the present invention, the preset temperature threshold is a temperature boundary used for judging whether it is necessary to adjust the initial rotational speed of the branch fan. The preset temperature threshold may be a temperature preset by a person skilled in the art based on empirical data, or may be a temperature obtained by a person skilled in the art after adjusting the set temperature according to actual needs, which is not limited in this embodiment of the present invention. The preset temperature threshold may be in the range of 0°C to 3°C. Preferably, the preset temperature threshold in this embodiment of the present invention is 3°C.

Step S2813: Obtain the rotational speed increase value of the sub-interval where the second temperature difference is located, and take the sum of the initial rotational speed and the rotational speed increase of the branch fan of the target heat exchange branch with a lower temperature as the target heat exchange branch with a lower temperature The target speed of the branch fan, and control the air conditioner to continue to run according to the target speed.

In the embodiment of the present invention, the corresponding relationship between sub-intervals, numerical ranges and rotational speed increments is preset. By matching the second temperature difference with the numerical range in the corresponding relationship table, the sub-interval described by the second temperature difference is determined. interval, and then obtain the speed increase from the corresponding relationship, and use the sum of the initial speed and the speed increase of the branch fan of the target heat exchange branch with a lower temperature as the branch of the target heat exchange branch with a lower temperature. The target speed of the road fan is controlled, and the air conditioner is controlled to continue to run according to the target speed.

Step S2814: Control the air conditioner to continue to run according to the initial rotational speed.

Based on the above steps S2810 to S2814, an example is given: when the air conditioner executes the cooling mode, the temperature boundary that needs to adjust the initial speed of the branch fan is preset as 3°C, and it is determined to obtain the first temperature of the refrigerant outflow side of each two heat exchange branches. The time boundary of the two temperature differences is 3 minutes, and the corresponding relationship between the sub-intervals, value ranges and rotational speed increments shown in the following table is preset:

subinterval Value range(℃) Speed increment (r/min) first subinterval <3 0 second subinterval 3 to 4 10 third subinterval 5～7 30 the fourth subinterval ≥8 50

When the obtained maximum second temperature difference is 6°C, the second temperature difference is greater than the preset temperature boundary line 3°C that needs to adjust the initial speed of the branch fan. Therefore, according to the above correspondence table, it can be known that the second temperature difference belongs to the third sub-interval , and the speed increase corresponding to the third sub-interval is 30r/min; if the initial speed of the branch fan of the target heat exchange branch with a lower temperature is 660r/min, then the temperature of the target heat exchange branch with a lower temperature The target speed of the branch fan is the sum of the initial speed and the increase in speed of the branch fan of the target heat exchange branch of the lower temperature section, that is, the target speed = 660 + 30 = 690r/min, so the target heat exchange of the lower temperature section is changed. The target speed of the branch fan of the hot branch is 690 r/min to control the operation of the air conditioner; when the obtained maximum second temperature difference is 2°C, the second temperature difference is smaller than the preset temperature boundary that needs to adjust the initial speed of the branch fan 3 ℃, so the air conditioner is controlled to continue to run according to the initial speed of the branch fans of the two target heat exchange branches; when the air conditioner runs for 3 minutes, the temperature sensor installed on the refrigerant outflow side of each heat exchange branch will obtain the temperature of each section. Calculate the temperature of the refrigerant outflow side of the heat exchange branch, and then calculate the temperature difference of the refrigerant outflow side of each two heat exchange branches respectively, and obtain the two heat exchange branches with the largest temperature difference as the two target heat exchange branches, and continue You can adjust it according to the above adjustment method. The calculation method of the initial rotational speed of the branch fan under the other second temperature difference is the same as the above, and will not be repeated here.

Step S2820: Detect the temperature of the refrigerant outflow side of each heat exchange branch at the same second preset time, to obtain the highest temperature among the temperatures as the target superheat load temperature.

In this embodiment of the present invention, the second preset time is used to determine a time boundary for acquiring the temperature of the refrigerant outflow side of each heat exchange branch. The second preset time may be a time preset by a person skilled in the art based on empirical data, or may be a time obtained by a person skilled in the art after adjusting the set time according to actual needs, which is not limited in this embodiment of the present invention. The second preset time may include a range of 5 to 50 seconds, and may also include a range of 3 to 15 minutes, for example, the second preset time may be 5 seconds, 10 seconds, 15 seconds, 30 seconds, 40 seconds, 50 seconds, It can also be 3 minutes, 5 minutes, 10 minutes or 15 minutes. Preferably, in this embodiment of the present invention, the second preset time is 5 minutes.

In one embodiment, the temperature of the refrigerant outflow side of each heat exchange branch is obtained through a temperature sensor disposed on the refrigerant outflow side of each heat exchange branch at the same second preset time, and then the highest temperature is obtained. temperature as the target superheat load temperature.

Step S2821: Determine whether the target overheating load temperature is greater than the preset overheating load temperature threshold, if yes, go to step S2823; if not, go to step S2822.

In the embodiment of the present invention, the preset overheating load temperature threshold is used to determine whether to adjust the temperature boundary of the operating frequency of the air conditioner compressor. The preset overheating load temperature threshold may be a temperature preset by a person skilled in the art based on empirical data, or may be a temperature obtained by a person skilled in the art after adjusting the set temperature according to actual needs, which is not limited in this embodiment of the present invention . The preset overheating load temperature threshold may include a range of 20-60°C, for example, the preset overheating load temperature threshold may be 20°C, 30°C, 40°C, 50°C or 60°C. Preferably, in the embodiment of the present invention, the preset temperature threshold of the overheating load is 52°C.

Step S2822: Keep the operating frequency of the air conditioner compressor unchanged.

Step S2823: Reduce the operating frequency of the air conditioner compressor.

Based on the above steps S2820 to S2823, an example is given: when the air conditioner executes the heating mode, the time boundary for determining the temperature of the refrigerant outflow side of each heat exchange branch is preset as 5 minutes, which is used to determine that the air conditioner compressor needs to be adjusted. The temperature boundary of the operating frequency is 52°C. When the maximum temperature obtained by the temperature sensor set on the refrigerant outflow side of each heat exchange branch is 55°C, the target superheat load temperature of 55°C is greater than the preset superheat load temperature. If the threshold value is 52°C, obtain the operating frequency of the air conditioner compressor (if the operating frequency of the air conditioner compressor is 55Hz) and reduce the operating frequency of the air conditioner compressor by 5Hz, if the compressor operating frequency=55-5=50Hz, then reduce The compressor operation frequency is 50 Hz to control the operation of the air conditioner. When the operation time reaches 5 minutes, the above control steps are performed again.

It should be pointed out that, although the steps in the above embodiments are described in a specific sequence, those skilled in the art can understand that in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such an order. It may be performed simultaneously (in parallel) or in other sequences, and these variations are within the scope of the present invention.

Further, the present invention also provides a fan control device for an indoor heat exchanger of an air conditioner.

Referring to FIG. 5 , FIG. 5 is a main structural block diagram of a fan control device for an indoor heat exchanger of an air conditioner according to an embodiment of the present invention. As shown in FIG. 5 , the fan control device of the indoor heat exchanger of the air conditioner in the embodiment of the present invention mainly includes a fan rotation speed determination module 11 and a fan control module 12 . In some embodiments, the fan rotation speed determination module 11 may be configured to, after receiving the air conditioner operation instruction, determine the initial rotation speed of the branch fan according to the first temperature difference between the room actual temperature and the room set temperature in the room where the air conditioner is located. The initial speed control air conditioner starts to operate. The fan control module 12 can be configured to obtain the second temperature difference of the refrigerant outflow side of each two heat exchange branches respectively when the air conditioner operates in the cooling mode during the operation of the air conditioner, and replace the two sections with the largest second temperature difference. The hot branch is used as the two-stage target heat-exchange branch; by increasing the initial speed of the branch fan of the one-stage target heat-exchange branch with a lower temperature, the second temperature difference between the refrigerant outflow sides of the two-stage target heat-exchange branch is made It is less than the preset temperature threshold to achieve the balance of heat exchange between the two target heat exchange branches; if the air conditioner is running in the heating mode, the initial speed of the branch fan is maintained unchanged. In one embodiment, for the description of the specific implementation function, reference may be made to the descriptions in steps S101 to S103.

The above-mentioned fan control device for an indoor heat exchanger of an air conditioner is used to implement the embodiments of the method for controlling a fan of an indoor heat exchanger of an air conditioner shown in FIGS. Similarly, those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related description of the fan control device of the indoor heat exchanger of the air conditioner can refer to the implementation of the fan control method of the indoor heat exchanger of the air conditioner The content described in the example will not be repeated here.

Those skilled in the art can understand that all or part of the process in the method for implementing the above-mentioned embodiment of the present invention can also be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a computer-readable In the storage medium, when the computer program is executed by the processor, the steps of the foregoing method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier Signals, telecommunications signals, and software distribution media. It should be noted that the content contained in the computer-readable storage medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, computer-readable Storage media exclude electrical carrier signals and telecommunications signals.

Further, the present invention also provides an electronic device. In an electronic device embodiment according to the present invention, the electronic device includes a processor and a storage device, the storage device may be configured to store a program for executing the fan control method for an indoor heat exchanger of an air conditioner according to the above method embodiment, and the processor may be It is configured to execute a program in the storage device, the program includes but is not limited to a program for executing the fan control method of the air-conditioning indoor heat exchanger according to the above method embodiment. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed, please refer to the method part of the embodiments of the present invention.

Further, the present invention also provides a computer-readable storage medium. In an embodiment of a computer-readable storage medium according to the present invention, the computer-readable storage medium may be configured to store a program for executing the fan control method for an indoor heat exchanger of an air conditioner according to the above method embodiment, and the program may be loaded by a processor And run to realize the fan control method of the above air-conditioning indoor heat exchanger. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed, please refer to the method part of the embodiments of the present invention. The computer-readable storage medium may be a storage device device formed by various electronic devices. Optionally, the computer-readable storage medium in this embodiment of the present invention is a non-transitory computer-readable storage medium.

Further, the present invention also provides an air conditioner.

In an embodiment of an air conditioner according to the present invention, the air conditioner indoor heat exchanger in the air conditioner is a segmented heat exchanger including multiple heat exchange branches, and the first branch ports of each heat exchange branch are respectively It is connected with the first pipeline port of the refrigerant circulation pipeline in the air-conditioning indoor, and the second branch port of each heat exchange branch 3 is respectively connected with the second pipeline port of the refrigerant circulation pipeline in the air-conditioning indoor; A branch fan is respectively provided on the same side of the road, and each branch fan is used to provide air volume to each corresponding heat exchange branch. Meanwhile, in this embodiment, the air conditioner may also be the fan control device of the indoor heat exchanger of the air conditioner described in the above device embodiment or the electronic device described in the above device embodiment. For the convenience of description, only the parts related to the embodiments of the present invention are shown, and the specific technical details are not disclosed, please refer to the parts of the apparatus or equipment of the embodiments of the present invention.

Further, it should be understood that since the setting of each module is only for describing the functional units of the apparatus of the present invention, the physical device corresponding to these modules may be the processor itself, or a part of software in the processor, a part of hardware, or Part of the combination of software and hardware. Therefore, the numbers of the various modules in the figures are merely schematic.

Those skilled in the art can understand that each module in the device can be split or combined adaptively. Such splitting or merging of specific modules will not cause the technical solutions to deviate from the principles of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. A fan control method of an indoor heat exchanger of an air conditioner is characterized in that the indoor heat exchanger of the air conditioner is a sectional type heat exchanger comprising a plurality of sections of heat exchange branches, a first branch port of each section of heat exchange branch is connected with a first pipeline port of a refrigerant circulation pipeline in the air conditioner, and a second branch port of each section of heat exchange branch is connected with a second pipeline port of the refrigerant circulation pipeline in the air conditioner; the same side of each section of heat exchange branch is respectively provided with a branch fan, and each branch fan is respectively used for providing air volume for each section of heat exchange branch corresponding to the branch fan;

the fan control method comprises the following steps:

after receiving an air conditioner operation instruction, determining the initial rotating speed of the branch fan according to a first temperature difference between the actual temperature of a room in which the air conditioner is located and the set temperature of the room, and controlling the air conditioner to start to operate according to the initial rotating speed;

in the course of the operation of the air conditioner,

if the air conditioner operates in a refrigeration mode, respectively acquiring second temperature differences of refrigerant outflow sides of every two sections of heat exchange branches, and taking the two sections of heat exchange branches with the largest second temperature differences as two sections of target heat exchange branches; increasing the initial rotating speed of a branch fan of a section of target heat exchange branch with lower temperature to enable the second temperature difference of the refrigerant outflow sides of the two sections of target heat exchange branches to be smaller than a preset temperature threshold value, so as to realize the balance of the heat exchange quantity of the two sections of target heat exchange branches;

and if the air conditioner operates in the heating mode, maintaining the initial rotating speed of the branch fan unchanged.

2. The method for controlling a fan of an indoor heat exchanger of an air conditioner according to claim 1, wherein the step of determining the initial rotation speed of the branch fan according to a first temperature difference between an actual room temperature and a set room temperature of a room in which the air conditioner is located specifically comprises:

dividing the numerical interval [0, N ] into a plurality of continuous subintervals, wherein each subinterval corresponds to a different rotation speed coefficient, and the rotation speed coefficient and the interval maximum value of the subinterval form a positive correlation relationship;

and acquiring a rotation speed coefficient of a subinterval where the first temperature difference is positioned, and taking the product of the rotation speed coefficient and a preset fan reference rotation speed as the initial rotation speed of the branch fan.

3. The fan control method of an indoor heat exchanger of an air conditioner according to claim 2, wherein each subinterval further corresponds to a different compressor frequency coefficient, respectively, and the compressor frequency coefficient is in a positive correlation with the subinterval maximum value;

the method further comprises the following steps:

and acquiring a compressor frequency coefficient of a subinterval where the first temperature difference is located, taking the product of the compressor frequency coefficient and a preset compressor reference rotating speed as the operating frequency of the air conditioner compressor, and simultaneously controlling the air conditioner to start to operate according to the initial rotating speed and the operating frequency.

4. The method for controlling the fan of the indoor heat exchanger of the air conditioner according to claim 1, wherein "second temperature differences at the refrigerant outflow sides of each two sections of the heat exchange branches are respectively obtained, and the two sections of the heat exchange branches with the largest second temperature differences are used as two sections of target heat exchange branches; the method comprises the following steps of increasing the initial rotating speed of a branch fan of one section of target heat exchange branch with lower temperature, enabling the second temperature difference of the refrigerant outflow sides of the two sections of target heat exchange branches to be smaller than a preset temperature threshold value, and achieving balance of heat exchange quantity of the two sections of target heat exchange branches:

dividing the numerical interval [0, M ] into a plurality of continuous subintervals, wherein each subinterval corresponds to different increment of the rotating speed, and the increment of the rotating speed and the maximum value of the subinterval form a positive correlation relationship;

respectively acquiring second temperature differences of the refrigerant outflow sides of every two sections of heat exchange branches at intervals of the same first preset time, and taking the two sections of heat exchange branches with the largest second temperature differences as two sections of target heat exchange branches;

judging whether the second temperature difference is greater than or equal to a preset temperature threshold value or not; if so, acquiring a rotation speed increment value of a subinterval where the second temperature difference is located, taking the sum of the initial rotation speed of the branch fan of the section of the target heat exchange branch with the lower temperature and the rotation speed increment as the target rotation speed of the branch fan of the section of the target heat exchange branch with the lower temperature, and controlling the air conditioner to continuously operate according to the target rotation speed;

if not, controlling the air conditioner to continue to operate according to the initial rotating speed.

5. The fan control method of an indoor heat exchanger of an air conditioner according to any one of claims 1 to 3, wherein if the air conditioner operates in a heating mode, the method further comprises:

respectively detecting the temperature of the refrigerant outflow side of each section of heat exchange branch at intervals of the same second preset time so as to obtain the highest temperature in the temperatures as a target overheating load temperature;

judging whether the target overheating load temperature is larger than a preset overheating load temperature threshold value or not;

if so, reducing the operating frequency of the air-conditioning compressor;

if not, the operation frequency of the air conditioner compressor is kept unchanged.

6. The method for controlling a fan of an indoor heat exchanger of an air conditioner according to claim 1, wherein during the operation of the air conditioner, the method further comprises:

and detecting a first temperature difference between the actual temperature of the room and the set temperature of the room in real time, and controlling the air conditioner to stop running if the first temperature difference is equal to zero.

7. A fan control device of an indoor heat exchanger of an air conditioner is characterized in that the indoor heat exchanger of the air conditioner is a sectional type heat exchanger comprising a plurality of sections of heat exchange branches, a first branch port of each section of heat exchange branch is connected with a first pipeline port of a refrigerant circulation pipeline in the air conditioner, and a second branch port of each section of heat exchange branch is connected with a second pipeline port of the refrigerant circulation pipeline in the air conditioner; be provided with a branch road fan respectively with one side of every section heat transfer branch road, every branch road fan is used for providing the amount of wind to every section heat transfer branch road that corresponds separately respectively, the device includes:

the fan rotating speed determining module is configured to determine the initial rotating speed of the branch fan and control the air conditioner to start to operate according to the initial rotating speed according to a first temperature difference between the actual temperature of a room where the air conditioner is located and the set temperature of the room after receiving an air conditioner operation instruction;

the fan control module is configured to respectively acquire a second temperature difference of the refrigerant outflow side of each two sections of heat exchange branches if the air conditioner operates in a refrigeration mode in the operation process of the air conditioner, and take the two sections of heat exchange branches with the largest second temperature difference as two sections of target heat exchange branches; increasing the initial rotating speed of a branch fan of a section of target heat exchange branch with lower temperature to enable the second temperature difference of the refrigerant outflow sides of the two sections of target heat exchange branches to be smaller than a preset temperature threshold value, so as to realize the balance of the heat exchange quantity of the two sections of target heat exchange branches; and if the air conditioner operates in the heating mode, maintaining the initial rotating speed of the branch fan unchanged.

8. An electronic device comprising a processor and a storage device adapted to store a plurality of program codes, wherein the program codes are adapted to be loaded and run by the processor to perform the fan control method of an indoor heat exchanger of an air conditioner according to any one of claims 1 to 6.

9. A computer readable storage medium having a plurality of program codes stored therein, wherein the program codes are adapted to be loaded and executed by a processor to perform the fan control method of an indoor heat exchanger of an air conditioner according to any one of claims 1 to 6.

10. An air conditioner is characterized in that an indoor heat exchanger of the air conditioner in the air conditioner is a sectional heat exchanger comprising a plurality of sections of heat exchange branches, a first branch port of each section of heat exchange branch is connected with a first pipeline port of an indoor refrigerant circulation pipeline of the air conditioner, and a second branch port of each section of heat exchange branch is connected with a second pipeline port of the indoor refrigerant circulation pipeline of the air conditioner; the same side of each section of heat exchange branch is respectively provided with a branch fan, and each branch fan is respectively used for providing air volume for each section of heat exchange branch corresponding to the branch fan;

the air conditioner includes the fan control device of the indoor heat exchanger of the air conditioner of claim 7 or the electronic apparatus of claim 8.

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