CN110567086B

CN110567086B - Dehumidification method of air conditioner and air conditioner

Info

Publication number: CN110567086B
Application number: CN201910848596.3A
Authority: CN
Inventors: 王军; 李本卫
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2021-05-14
Anticipated expiration: 2039-09-09
Also published as: CN110567086A

Abstract

The embodiment of the invention discloses a dehumidification method of an air conditioner and the air conditioner, relates to the technical field of air conditioners and solves the problems that the latent heat output by the air conditioner is low and the dehumidification capacity is poor in plum rain seasons in low-temperature and high-humidity areas. The specific scheme is as follows: after a dehumidification instruction is received, the indoor temperature, the indoor relative humidity and the evaporation temperature of the rotating speed in the current rotating speed period are obtained after the compressor operates for a preset time period, the evaporation temperature of the rotating speed is obtained through an indoor inlet sensor arranged at an inlet of a target branch of an evaporator or at a first U-shaped pipe elbow away from the inlet of the target branch, the dew point temperature of the rotating speed is determined according to the indoor temperature and the indoor relative humidity of the rotating speed, the target rotating speed of an indoor motor is determined according to a first difference value between the indoor relative humidity of the rotating speed and the dew point temperature of the rotating speed and the evaporation temperature of the rotating speed, and the indoor motor is controlled to operate according to the target rotating speed in the current rotating speed period.

Description

Dehumidification method of air conditioner and air conditioner

Technical Field

The embodiment of the invention relates to the technical field of air conditioners, in particular to a dehumidification method of an air conditioner and the air conditioner.

Background

Currently, the total refrigerating capacity of an air conditioner output during dehumidification is composed of sensible heat and latent heat. And the total load of the room at the time of dehumidification means the amount of sensible heat required to reduce the current indoor temperature to the set temperature and the amount of latent heat required to reduce the current indoor relative humidity to the set relative humidity.

In the prior art, the air conditioner can determine the rotating speed of an indoor motor in real time according to the difference value between the indoor temperature and the set temperature, so that the rotating speed of the motor is switched among a high gear, a medium gear and a low gear to dehumidify. However, in the rainy season in the medium and low temperature and high humidity areas, because the outdoor temperature in the high humidity area is not high, the sensible heat load of the room is small, the operation frequency of the compressor is low, the evaporation temperature is increased, the difference between the dew point temperature and the evaporation temperature is reduced, the latent heat output by the air conditioner is reduced, and the dehumidification capacity is poor at this moment. The refrigerating capacity output by the air conditioner can be generated, the indoor temperature can be only reduced to the set temperature, the indoor relative humidity is not reduced to the set relative humidity, and the user experience is poor. Therefore, how to improve the dehumidification capability in the plum rain season becomes a research topic of those skilled in the art.

Disclosure of Invention

The invention provides a dehumidification method of an air conditioner and the air conditioner, which solve the problems of low latent heat output by the air conditioner and poor dehumidification capability in plum rain seasons of medium-low temperature and high humidity areas.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a dehumidification method of an air conditioner, which may include: after a dehumidification instruction is received, determining that the indoor environment is in a low-sensible-heat and high-latent-heat load stage, wherein the low-sensible-heat and high-latent-heat load stage is a stage in which indoor required sensible heat is lower than a first value and required latent heat is higher than a second value; after the compressor operates for a preset time period, acquiring the indoor temperature of the rotating speed, the indoor relative humidity of the rotating speed and the evaporating temperature of the rotating speed in the current rotating speed period; the rotating speed evaporation temperature is obtained through an indoor inlet sensor, and the indoor inlet sensor is arranged at an inlet of a target branch included in the evaporator or at a first U-shaped pipe elbow away from the inlet of the target branch; determining the rotating speed dew point temperature according to the rotating speed indoor temperature and the rotating speed indoor relative humidity; determining a target rotating speed of the indoor motor according to the rotating speed indoor relative humidity and the first difference value; the first difference is the difference between the rotating speed dew point temperature and the rotating speed evaporating temperature; and the motor in the control room is dehumidified according to the target rotating speed in the current rotating speed period.

With reference to the first aspect, in one possible implementation manner, the target rotation speed is greater than or equal to the lowest rotation speed at which the indoor motor reliably operates, and is less than or equal to the rotation speed corresponding to the lowest wind speed gear during dehumidification.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, determining a target rotation speed of an indoor motor according to a rotation speed and an indoor relative humidity and a first difference includes: if the indoor relative humidity of the rotating speed is greater than the set relative humidity, judging the size of the first difference value; if the first difference is smaller than a first preset value, subtracting the rotating speed difference from the rotating speed of the indoor motor in the previous period to obtain a target rotating speed; if the first difference is larger than the second preset value, when the rotating speed of the indoor motor in the previous period is determined to be smaller than the rotating speed corresponding to the lowest wind speed gear, the rotating speed of the indoor motor in the previous period is added with the rotating speed difference to obtain a target rotating speed; if the first difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target rotating speed is the same as the rotating speed of the indoor motor in the previous period.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: the target speed is the same as the speed of the indoor motor in the previous cycle if the speed indoor relative humidity is less than or equal to the set relative humidity.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining that the phase is in a low sensible heat and high latent heat load stage includes: and when the current outdoor temperature is determined to be less than or equal to the preset outdoor temperature, the current indoor relative humidity is determined to be greater than or equal to the preset humidity value, and the difference value between the current indoor temperature and the set temperature is determined to be less than or equal to the preset difference value, determining that the current stage is in a low sensible heat and high latent heat load stage.

With reference to the first aspect and the possible implementation manners, in another possible implementation manner, the method further includes obtaining an opening indoor temperature, an opening indoor relative humidity, an opening evaporation temperature, and an overheat temperature of the current opening period after the compressor operates for a preset time period; the overheating temperature is obtained through an indoor coil sensor which is arranged at a U-shaped pipe elbow in the middle of a target branch; determining the opening dew point temperature according to the opening indoor temperature and the opening indoor relative humidity; determining a target opening degree of an electronic expansion valve of the outdoor unit according to the second difference value and the third difference value; the second difference is the difference between the opening indoor temperature and the overheating temperature, and the third difference is the difference between the opening dew point temperature and the opening evaporation temperature; the target opening degree of the first opening degree period is obtained according to the initial operation frequency of the compressor, and the initial operation frequency is obtained according to the difference value of the current indoor temperature and the set temperature; and controlling the electronic expansion valve to be opened according to the target opening degree in the current opening degree period.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, determining a target opening degree of an electronic expansion valve of an outdoor unit according to a second difference and a third difference includes: if the second difference value is smaller than or equal to a third preset value, judging the size of the third difference value; if the third difference is smaller than the first preset value, subtracting the opening difference from the opening of the electronic expansion valve in the previous period to obtain a target opening; if the third difference is larger than the second preset value, adding the opening difference to the opening of the electronic expansion valve in the previous period to obtain a target opening; and if the third difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target opening degree is the same as the opening degree of the electronic expansion valve in the previous period.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method further includes: and if the second difference is larger than a third preset value, subtracting the opening difference from the opening of the electronic expansion valve in the previous period to obtain the target opening.

In a second aspect, the present invention provides an air conditioner, which may include: the device comprises a determining unit, an acquiring unit and a control unit. And the determining unit is used for determining the low-sensible-heat and high-latent-heat load stage after the dehumidification instruction is received, wherein the low-sensible-heat and high-latent-heat load stage is a stage in which the required sensible heat in the room is lower than a first value and the required latent heat is higher than a second value. The acquisition unit is used for acquiring the indoor temperature, the indoor relative humidity and the rotating speed evaporation temperature of the rotating speed in the current rotating speed period after the compressor operates for a preset time period; the rotating speed evaporation temperature is obtained through an indoor inlet sensor which is arranged at the inlet of a target branch included in the evaporator or at the first U-shaped pipe elbow away from the inlet of the target branch. The determining unit is also used for determining the rotating speed dew point temperature according to the rotating speed indoor temperature and the rotating speed indoor relative humidity; determining a target rotating speed of the indoor motor according to the rotating speed indoor relative humidity and the first difference value; the first difference is the difference between the rotating speed dew point temperature and the rotating speed evaporating temperature. And the control unit is used for controlling the indoor motor to dehumidify in the current rotating speed period according to the target rotating speed.

With reference to the second aspect, in a possible implementation manner, the determining unit is specifically configured to: if the indoor relative humidity of the rotating speed is greater than the set relative humidity, judging the size of the first difference value; if the first difference is smaller than a first preset value, subtracting the rotating speed difference from the rotating speed of the indoor motor in the previous period to obtain a target rotating speed; if the first difference is larger than the second preset value, when the rotating speed of the indoor motor in the previous period is determined to be smaller than the rotating speed corresponding to the lowest wind speed gear, the rotating speed of the indoor motor in the previous period is added with the rotating speed difference to obtain a target rotating speed; if the first difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target rotating speed is the same as the rotating speed of the indoor motor in the previous period.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is further configured to determine that the target rotation speed is the same as the rotation speed of the indoor motor in the previous cycle if the rotation speed indoor relative humidity is less than or equal to the set relative humidity.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is specifically configured to: and when the current outdoor temperature is determined to be less than or equal to the preset outdoor temperature, the current indoor relative humidity is determined to be greater than or equal to the preset humidity value, and the difference value between the current indoor temperature and the set temperature is determined to be less than or equal to the preset difference value, determining that the current stage is in a low sensible heat and high latent heat load stage.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the obtaining unit is further configured to obtain an opening indoor temperature, an opening indoor relative humidity, an opening evaporation temperature, and an overheat temperature of the current opening period after the compressor operates for a preset time period; the superheat temperature is obtained by an indoor coil sensor which is arranged at a U-shaped pipe elbow in the middle of a target branch. The determining unit is also used for determining the opening dew point temperature according to the opening indoor temperature and the opening indoor relative humidity; determining a target opening degree of an electronic expansion valve of the outdoor unit according to the second difference value and the third difference value; the second difference is the difference between the opening indoor temperature and the overheating temperature, and the third difference is the difference between the opening dew point temperature and the opening evaporation temperature; the target opening degree of the first opening degree period is obtained according to the initial operation frequency of the compressor, and the initial operation frequency is obtained according to the difference value of the current indoor temperature and the set temperature; and the control unit is also used for controlling the electronic expansion valve to be opened according to the target opening degree in the current opening degree period.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is specifically configured to: if the second difference value is smaller than or equal to a third preset value, judging the size of the third difference value; if the third difference is smaller than the first preset value, subtracting the opening difference from the opening of the electronic expansion valve in the previous period to obtain a target opening; if the third difference is larger than the second preset value, adding the opening difference to the opening of the electronic expansion valve in the previous period to obtain a target opening; and if the third difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target opening degree is the same as the opening degree of the electronic expansion valve in the previous period.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the determining unit is further configured to subtract the opening degree difference from the opening degree of the electronic expansion valve in the previous cycle to obtain the target opening degree if the second difference is greater than a third preset value.

Specific implementation manners may refer to the first aspect or the possible implementation manners of the first aspect, and the behavioral function of the air conditioner in the dehumidification method of the air conditioner.

In a third aspect, an air conditioner is provided, including: at least one processor, a memory, a communication interface, and a communication bus. The processor is connected with the memory and the communication interface through a communication bus, the memory is used for storing computer execution instructions, and when the air conditioner runs, the processor executes the computer execution instructions stored in the memory, so that the air conditioner executes the dehumidification method of the air conditioner according to the first aspect or any one of the possible implementation manners of the first aspect.

In a fourth aspect, a computer storage medium is provided, on which computer executable instructions are stored, which, when run on an air conditioner, cause the air conditioner to perform a dehumidification method of the air conditioner as in the first aspect or any one of the possible implementations of the first aspect.

The invention provides a dehumidification method of an air conditioner, which is characterized in that after a dehumidification instruction is received, the state of the air conditioner is determined to be in a low sensible heat and high latent heat load stage, after a compressor runs for a preset time period, the rotating speed indoor temperature, the rotating speed indoor relative humidity and the rotating speed evaporating temperature of a current rotating speed period are obtained, the rotating speed evaporating temperature is obtained through an indoor inlet sensor, the indoor inlet sensor is installed at the inlet of a target branch circuit included in an evaporator or at a first U-shaped pipe elbow away from the inlet of the target branch circuit, the rotating speed dew point temperature is determined according to the rotating speed indoor temperature and the rotating speed indoor relative humidity, the target rotating speed of an indoor motor is determined according to the difference value between the rotating speed indoor relative humidity and the rotating speed dew point temperature and the rotating speed evaporating temperature. Therefore, compared with the prior art that the rotating speed of the indoor motor is adjusted according to the difference between the indoor relative humidity, the dew point temperature and the evaporation temperature, the rotating speed of the indoor motor is adjusted according to the difference between the indoor temperature and the set temperature, the difference between the dew point temperature and the evaporation temperature can reflect the size of the dehumidification capacity, and therefore when the rotating speed is determined according to the difference, the evaporation temperature is reduced, latent heat component output by the air conditioner is improved, sensible heat component is reduced, namely the dehumidification capacity is improved, the indoor temperature and the indoor relative humidity can reach corresponding set values, and user experience is improved.

Drawings

Fig. 1 is a schematic diagram illustrating an air conditioner according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a dehumidification method of an air conditioner according to an embodiment of the present invention;

fig. 3 is a schematic installation diagram of a sensor of an indoor unit according to an embodiment of the present invention;

FIG. 4 is a flow chart illustrating a dehumidification method of an air conditioner according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of the results of a prior art dehumidification method;

FIG. 6 is a graph showing the results of the dehumidification process of the present invention;

FIG. 7 is a schematic diagram of another air conditioner according to an embodiment of the present invention;

fig. 8 is a schematic diagram of another air conditioner according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic composition diagram of an air conditioner according to an embodiment of the present invention, and as shown in fig. 1, the air conditioner may include: at least one processor 11, a memory 12, a communication interface 13, and a communication bus 14.

The following describes the components of the air conditioner in detail with reference to fig. 1:

the processor 11 is a control center of the air conditioner, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 11 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

In particular implementations, processor 11 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 1, for example, as one embodiment. Also, as an example, the air conditioner may include a plurality of processors, such as the processor 11 and the processor 15 shown in fig. 1. Each of these processors may be a Single-core processor (Single-CPU) or a Multi-core processor (Multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 12 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 12 may be self-contained and coupled to the processor 11 via a communication bus 14. The memory 12 may also be integrated with the processor 11.

In a specific implementation, the memory 12 is used for storing data in the present invention and software programs for executing the present invention. The processor 11 may perform various functions of the air conditioner by running or executing a software program stored in the memory 12 and calling data stored in the memory 12.

The communication interface 13 is any device such as a transceiver for communicating with other devices or communication Networks, such as a Radio Access NetWork (RAN), a Wireless Local Area NetWork (WLAN), and the like. The communication interface 13 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The communication bus 14 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 1, but it is not intended that there be only one bus or one type of bus.

In order to solve the problems of low latent heat output by the air conditioner and poor dehumidification capacity in plum rain seasons of low-medium temperature and high-humidity areas, the embodiment of the invention provides a dehumidification method of the air conditioner, which can improve the dehumidification capacity in a low-sensible-heat high-latent-heat load stage. As shown in fig. 2, the method may include:

201. and after a dehumidification command is received, determining that the system is in a low sensible heat and high latent heat load stage.

The low sensible heat and high latent heat load stage is a stage in which the required sensible heat in the room is lower than a first value and the required latent heat is higher than a second value, and the stage can be a plum rain season in a medium-low temperature and high-humidity area, for example.

After receiving a dehumidification instruction of a user, the air conditioner can detect the current outdoor temperature, the current indoor temperature and the current indoor relative humidity and judge whether the air conditioner is in a low sensible heat and high latent heat load stage at present. If the current outdoor temperature is less than or equal to the preset outdoor temperature, the current indoor relative humidity is greater than or equal to the preset humidity value, and the difference between the current indoor temperature and the set temperature is less than or equal to the preset difference, it is determined that the current indoor temperature is in the low sensible heat and high latent heat stage, at this time, the low sensible heat and high latent heat mode can be entered, and the following steps 202-205 are performed for dehumidification. Otherwise, the normal dehumidification mode is operated.

202. And after the compressor operates for a preset time period, acquiring the rotating speed indoor temperature, the rotating speed indoor relative humidity and the rotating speed evaporating temperature of the current rotating speed period.

After determining that the air conditioner is in the low sensible heat and high latent heat load stage, the air conditioner may determine an initial operating frequency of the compressor according to a difference between the current indoor temperature detected in step 201 and the set temperature, and determine an initial opening degree of the electronic expansion valve according to the initial operating frequency. Therefore, in a preset time period, the compressor starts from the initial operation frequency, the operation frequency is continuously adjusted according to the difference value between the indoor temperature and the set temperature, and the electronic expansion valve is opened according to the initial opening degree. After the operation for the preset time period, the performance of the air conditioner is stable, and the rotating speed of the indoor motor can be periodically adjusted to perform dehumidification, and a cycle is taken as an example for description. The air conditioner can acquire the rotating speed indoor temperature, the rotating speed indoor relative humidity and the rotating speed evaporating temperature in the current rotating speed period. The indoor temperature of the rotating speed can be obtained through an indoor environment temperature sensor on the indoor unit, the indoor relative humidity of the rotating speed can be obtained through a relative humidity sensor on the indoor unit, the evaporating temperature of the rotating speed can be obtained through an indoor inlet sensor on the indoor unit, and the indoor inlet sensor can be arranged at an inlet of a target branch included by the evaporator or at a first U-shaped pipe elbow away from the inlet of the target branch. The evaporator can comprise a plurality of branches, each branch is formed by connecting a plurality of U-shaped pipes in series, and the target branch can be any one of the branches. As shown in fig. 3, the target leg is leg 1 and the indoor inlet sensor may be mounted at the inlet of leg 1 or at the first U-bend from leg 1.

It should be noted that the triggering instruction of the dehumidification method of the air conditioner may be a dehumidification instruction, and may also be an automatic wind speed instruction in the refrigeration mode selected by the user.

In addition, in the embodiment of the present invention, the operating frequency of the compressor is positively correlated with the difference between the indoor temperature and the set temperature, that is, the operating frequency increases with the increase of the difference, and an upper limit value and a lower limit value of the operating frequency may be preset, where the lower limit value is a minimum frequency at which the compressor can be reliably operated, and the upper limit value is obtained according to a maximum frequency at which the compressor can be reliably operated and belongs to a low frequency range. And the initial opening degree of the electronic expansion valve is positively and strongly correlated with the operation frequency, namely the initial opening degree is increased along with the increase of the operation frequency, and the minimum opening degree is fully closed, namely 0 step.

203. And determining the rotating speed dew point temperature according to the rotating speed indoor temperature and the rotating speed indoor relative humidity.

After the air conditioner acquires the rotating speed indoor temperature and the rotating speed indoor relative humidity of the current rotating speed period, the corresponding relation table of the indoor temperature, the indoor relative humidity and the dew point temperature can be searched, and the rotating speed dew point temperature corresponding to the acquired rotating speed indoor temperature and the rotating speed indoor relative humidity is determined.

In a possible implementation manner, since the indoor temperature is an integer and the indoor relative humidity is an integer multiple of a certain value in the correspondence table of the indoor temperature, the indoor relative humidity and the dew point temperature, the air conditioner needs to process the indoor temperature which is not an integer and the indoor relative humidity which cannot be evenly divided by a certain value before determining the dew point temperature. Specifically, the non-integer indoor temperature may be added with a preset value and then rounded, and the indoor relative humidity that cannot be divisible by a certain value may be added with a corresponding preset value and then taken as an integral multiple of the certain value.

Illustratively, table 1 is a table of correspondence between indoor temperature, indoor relative humidity and dew point temperature, and as shown in table 1, the first row is indoor temperature in units of ° c, the first column is indoor relative humidity in units of%, the middle value is dew point temperature in units of ° c, and indoor relative humidity can be evenly divided by 5. Assuming that the indoor temperature of the rotating speed in the current rotating speed period is 28.6 ℃, the indoor relative humidity of the rotating speed is 78.3%, the preset value corresponding to the indoor temperature is 0.5%, and the preset value corresponding to the indoor relative humidity is 2.5%. Then the temperature of 28.6 ℃ plus 0.5 ℃ is rounded to 29 ℃, the temperature of 78.3% plus 2.5% is rounded to 80% which is an integral multiple of 5, and finally the dew point temperature of the rotating speed corresponding to 29 ℃ and 80% is found to be 26 ℃ from table 1.

TABLE 1

	22	23	24	25	26	27	28	29	30
										40	9	10	11	12	13	14	15	16	17
45	10	11	12	13	14	15	16	17	18
										50	12	13	14	15	16	17	18	19	20
55	13	14	15	16	17	18	19	20	21
										60	14	15	16	17	18	19	20	21	22
65	15	16	17	18	19	20	21	22	23
										70	17	18	19	20	21	22	23	24	25
75	18	19	20	21	22	23	24	25	26
										80	19	20	21	22	23	24	25	26	27
85	19	20	21	22	23	24	25	26	27
										90	20	21	22	23	24	25	26	27	28

204. And determining the target rotating speed of the indoor motor according to the rotating speed indoor relative humidity and the first difference value.

After determining the rotating speed dew point temperature of the current rotating speed period, the air conditioner may determine the target rotating speed of the indoor motor according to the rotating speed indoor relative humidity obtained in step 202 and the difference between the rotating speed dew point temperature and the rotating speed evaporating temperature, that is, the first difference. When the air conditioner comprises a plurality of wind speed gears, such as high wind, medium wind and low wind gears, the lowest wind speed gear is a low wind gear, and the lowest rotating speed is far lower than the rotating speed corresponding to the low wind gear. Specifically, the method comprises the following steps:

the target speed is the same as the speed of the indoor motor in the previous cycle if the speed indoor relative humidity is less than or equal to the set relative humidity.

And if the relative humidity in the rotating speed chamber is greater than the set relative humidity, judging the size of the first difference. If the first difference is smaller than a first preset value, subtracting the rotating speed difference from the rotating speed of the indoor motor in the previous period to obtain a target rotating speed; if the first difference is larger than the second preset value, when the rotating speed of the indoor motor in the previous period is determined to be smaller than the rotating speed corresponding to the lowest wind speed gear, the rotating speed of the indoor motor in the previous period is added with the rotating speed difference to obtain a target rotating speed; if the first difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target rotating speed is the same as the rotating speed of the indoor motor in the previous period.

It should be noted that, in the embodiment of the present invention, the set relative humidity may be preset by a user through a remote controller, an air conditioner display screen, or an application of an intelligent terminal, and the range of the settable relative humidity is a relative humidity range that is comfortable for the user, such as 30% to 70%. When the user does not set, the set relative humidity may be a default value preset in the air conditioner, and the default value may be any value in the range of 30% -70%, such as 60%. In addition, in the embodiment of the present invention, during the preset time period when the compressor is operated and during the first rotation speed period, the rotation speed of the indoor motor may be a preset rotation speed value, for example, the preset rotation speed value may be a rotation speed corresponding to a low gear.

205. And the motor in the control room is dehumidified according to the target rotating speed in the current rotating speed period.

Further, in the embodiment of the present invention, the air conditioner may periodically adjust the rotation speed of the indoor motor, and may also periodically adjust the opening degree of the electronic expansion valve of the outdoor unit, that is, adjust the flow rate of the refrigerant, to reduce the evaporation temperature, and simultaneously ensure that the liquid refrigerant is completely evaporated into the gaseous superheated refrigerant before the middle portion of the target branch of the evaporator, where the first half of the target branch is an evaporation section and the second half is a superheated section. Specifically, as shown in fig. 4, the dehumidification method of the air conditioner may further include:

206. and after the compressor operates for a preset time period, acquiring the opening indoor temperature, the opening indoor relative humidity, the opening evaporation temperature and the overheating temperature of the current opening period.

After the air conditioner determines that the air conditioner is in a low sensible heat and high latent heat load stage and the compressor operates for a preset time period, the performance of the air conditioner is stable, and the opening of the electronic expansion valve can be periodically adjusted to perform dehumidification, and a cycle is taken as an example for description. The air conditioner may first acquire an opening indoor temperature, an opening indoor relative humidity, an opening evaporation temperature, and an overheat temperature of a current opening period. With reference to fig. 3, the superheat temperature is obtained by an indoor coil sensor on the indoor unit, and the indoor coil sensor is installed at the U-shaped pipe elbow in the middle of the target branch.

It should be noted that the first rotation speed period and the first opening degree period are the same period. The cycle time of the rotation speed period and the cycle time of the opening degree period may be the same or different. When the rotation speed period and the opening period are the same, the rotation speed indoor temperature is the same as the opening indoor temperature, the rotation speed indoor relative humidity is the same as the opening indoor relative humidity, and the rotation speed evaporation temperature is the same as the opening evaporation temperature.

207. And determining the opening dew point temperature according to the opening indoor temperature and the opening indoor relative humidity.

The method for determining the opening dew point temperature by the air conditioner according to the opening indoor temperature and the opening indoor relative humidity is the same as the method for determining the rotating speed dew point temperature according to the rotating speed indoor temperature and the rotating speed indoor relative humidity in the step 203, and is not described herein again.

208. And determining the target opening degree of the electronic expansion valve of the outdoor unit according to the second difference value and the third difference value.

After the opening dew point temperature of the current opening period is determined, the air conditioner can determine the target opening of the electronic expansion valve according to the second difference and the third difference. The second difference is the difference between the opening indoor temperature and the overheating temperature, the third difference is the difference between the opening dew point temperature and the opening evaporation temperature, and the target opening of the first opening period is equal to the initial opening. Specifically, the method comprises the following steps:

and if the second difference is larger than a third preset value, subtracting the opening difference from the opening of the electronic expansion valve in the previous period to obtain a target opening so as to reduce the evaporation temperature.

And if the second difference value is smaller than or equal to a third preset value, judging the size of the third difference value. If the third difference is smaller than the first preset value, subtracting the opening difference from the opening of the electronic expansion valve in the previous period to obtain a target opening; if the third difference is larger than the second preset value, adding the opening difference to the opening of the electronic expansion valve in the previous period to obtain a target opening; and if the third difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target opening degree is the same as the opening degree of the electronic expansion valve in the previous period.

It should be noted that, in the embodiment of the present invention, the first preset value, the second preset value, the third preset value, the opening difference value, and the rotation speed difference value are all preset in the air conditioner.

209. And controlling the electronic expansion valve to be opened according to the target opening degree in the current opening degree period.

Therefore, the evaporation temperature is controlled within a certain range by periodically adjusting the opening degree of the electronic expansion valve, and the overheat temperature is controlled to be close to the indoor temperature, so that the purposes of reducing the evaporation temperature and improving the dehumidification capacity are achieved.

For example, based on the example in step 203, it is assumed that the set temperature is 25 ℃, the set relative humidity is 50%, the first preset value is 5 ℃, the second preset value is 10 ℃, the third preset value is 1 ℃, the rotation speed difference is 10 revolutions, the opening difference is 2 steps, the minimum rotation speed for reliable operation of the indoor motor is 100 revolutions, and the minimum wind speed gear is 800 revolutions. Assume that the air conditioner detects that the outdoor temperature is 18 ℃, the indoor temperature is 24.9 ℃ and the indoor relative humidity is 92% after receiving the dehumidification command. Since the outdoor temperature is 18 ℃, the outdoor temperature is less than 22 ℃, the indoor relative humidity is 92%, the humidity is greater than 70%, the difference between the indoor temperature and the set temperature is 24.9-25 ℃ - < 0.1 ℃, and the difference is less than 0.5 ℃, the low-sensible-heat high-latent-heat load stage is determined, and the low-sensible-heat high-latent-heat mode is entered.

The dehumidification method of the air conditioner will be described by taking an example in which the air conditioner periodically adjusts the rotation speed of the indoor motor and the opening degree of the electronic expansion valve.

Assuming that the initial opening degree is 60 steps, after a preset time period, for example, 10 minutes, of entering the low sensible heat and high latent heat mode, the opening degree of the electronic expansion valve in the first opening degree period is still 60 steps. After 90 seconds(s) of operation, assuming that the indoor temperature of the second opening period is 24 ℃, the indoor relative humidity is 88%, the evaporation temperature is 10 ℃ and the superheat temperature is 23 ℃, table 1 shows that the dew point temperatures corresponding to 24 ℃ and 90% are 22 ℃. Since the second difference is 1 ℃ between 24 ℃ and 23 ℃, which is equal to the third preset value of 1 ℃, and the second difference is 12 ℃ between 22 ℃ and 10 ℃, which is greater than the second preset value of 10 ℃, the target opening of the second opening period is the opening of the first opening period plus 2 steps, and 62 steps are obtained. After 90s of operation, assuming that the second difference of the third opening period is still 1 ℃, the third difference is 8 ℃, which is greater than 5 ℃ and less than 10 ℃, the target opening of the third opening period is the same as the opening of the second opening period, and the step is still 62.

The first rotation speed period starts after 10 minutes of entering the low sensible heat and high latent heat mode, and the indoor motor operates at 800 revolutions in the first rotation speed period. After 5 minutes of operation, assuming a second cycle of rpm with an indoor temperature of 24.7 ℃, an indoor relative humidity of 83%, and an evaporation temperature of 10 ℃, table lookup 1 reveals that the dew point temperatures for 25 ℃ and 85% correspond to 22 ℃. Because the indoor relative humidity is 83 percent and is 50 percent higher than the set relative humidity, the first difference value of 22-10 ℃ is 12 ℃, the first difference value is 10 ℃ higher than the second preset value, and the rotating speed of the indoor motor in the last period is equal to the rotating speed corresponding to the lowest wind speed gear, the rotating speed of the indoor motor in the second rotating speed period is still 800 revolutions. After the indoor motor runs for 5 minutes at 800 revolutions, the indoor relative humidity of the third revolution period is assumed to be still more than 50%, the first difference is 8 ℃, the first difference is 5 ℃ higher than the first preset value and 10 ℃ lower than the second preset value, and therefore the revolution speed of the indoor motor in the third revolution period is the same as the revolution speed of the second revolution period and is still 800 revolutions.

To facilitate understanding by those skilled in the art, embodiments of the present invention are described herein in terms of a method for dehumidifying air conditioners in city a in a medium-low temperature, high humidity region. In a room with a certain fixed area in city A, under the condition that the temperature is set to be 27 ℃ and the relative humidity is set to be 50%, counting the sensible heat load required for reducing the indoor temperature to be 27 ℃ and the latent heat load required for reducing the indoor relative humidity to be 50% every day in the period of 5-9 months, and comparing the results of the dehumidification method in the prior art and the dehumidification method in the invention.

Fig. 5 is a graph showing the results of the dehumidification method according to the prior art, and as shown in fig. 5, the abscissa represents sensible heat, the ordinate represents latent heat, and black dots represent load point distribution from 5 months to 9 months. As can be seen from fig. 5, the dense dark spots indicate that the room has a large latent heat load, i.e., dehumidification demand. And the coverage area of the irregular graph in fig. 5 shows the area enclosed by the sensible heat and the latent heat output when the air conditioner in the room continuously adjusts the rotating speed of the indoor motor for dehumidification according to the change of the difference value between the indoor temperature and the set temperature. Assuming that the air conditioner includes four stages of strong wind, high wind, medium wind, and low wind, the rotation speed is switched between the four stages. As can be seen from fig. 5, the sensible heat output from the air conditioner has a large component, and the latent heat output has a small air volume, resulting in less overlapping of the irregular pattern coverage area and the black spot distribution area. The overlapped portion indicates the cooling capacity of the air conditioner output, and can reduce the indoor temperature and the indoor relative humidity to the corresponding set values. The non-overlapped part indicates that the refrigerating capacity output by the air conditioner can only reduce one of the indoor temperature and the indoor relative humidity to the corresponding set value. At this time, if the refrigerating capacity of the air conditioner is controlled to the set temperature only, and the indoor relative humidity is not reduced to the set relative humidity, the room is still in a high humidity state, the air is humid, and the user feels uncomfortable; if the air conditioner continues to lower the indoor relative humidity to the set relative humidity, the indoor temperature will be lower than the set temperature, and the user feels cooler. For example, assuming that the sensible heat load required for a room is 1500W and the latent heat load required is 800W, if the sensible heat component output from the air conditioner is 1500W and the latent heat component is 800W, both the indoor temperature and the indoor relative humidity can be controlled to the set values. For another example, assuming that the sensible heat load required for a room is 800W and the latent heat load required is 600W, if the sensible heat component output by the air conditioner is 800W and the latent heat component is 200W, the indoor temperature can only be controlled to 27 ℃, and the indoor relative humidity is reduced by less than 50%; if the sensible heat component and the latent heat component output by the air conditioner are 600W and 1400W, the indoor relative humidity can be controlled to 50% only, and the indoor temperature can be lower than 27 ℃. Therefore, when the dehumidification method in the prior art is adopted, the dehumidification capacity is poor.

Fig. 6 is a schematic view showing the result of the dehumidification method according to the present invention, and as shown in fig. 6, the black spot distribution area is the same as that of fig. 5. However, after the rotational speed gear of the air conditioner is increased by 3 breeze gears, and the air conditioner in the room is dehumidified by the method of the above steps 201 to 209, it can be seen from comparing fig. 6 with fig. 5 that the sensible heat component output by the air conditioner is reduced, the latent heat component is increased, and the overlapping portion of the coverage area of the irregular pattern and the black spot distribution area is increased. That is, the dehumidification method of the present invention can improve the dehumidification capability.

The scheme provided by the embodiment of the invention is mainly introduced from the perspective of an air conditioner. It is understood that the air conditioner includes hardware structures and/or software modules corresponding to the respective functions in order to implement the above-described functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The embodiment of the present invention may perform the division of the functional modules for the air conditioner according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of dividing each function module according to each function, fig. 7 shows another possible composition diagram of the air conditioner related to the above embodiment, as shown in fig. 7, the air conditioner may include: a determination unit 31, an acquisition unit 32 and a control unit 33.

The determining unit 31 is configured to support the air conditioner to perform

steps

201, 203, and 204 in the dehumidification method of the air conditioner shown in fig. 2, and steps 207 and 208 in the dehumidification method of the air conditioner shown in fig. 4.

An obtaining unit 32, configured to support the air conditioner to perform step 202 in the dehumidification method of the air conditioner shown in fig. 2, and step 206 in the dehumidification method of the air conditioner shown in fig. 4.

And a control unit 33, configured to support the air conditioner to perform step 205 in the dehumidification method of the air conditioner shown in fig. 2, and step 209 in the dehumidification method of the air conditioner shown in fig. 4.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

The air conditioner provided by the embodiment of the invention is used for executing the dehumidification method of the air conditioner, so that the same effect as the dehumidification method of the air conditioner can be achieved.

In the case of an integrated unit, fig. 8 shows another possible schematic composition of the air conditioner according to the above-described embodiment. As shown in fig. 8, the air conditioner includes: a processing module 41, a communication module 42 and a storage module 43.

Wherein the processing module 41 is used for controlling and managing the action of the air conditioner, for example, the processing module 41 is used for supporting the air conditioner to execute step 201, step 202, step 203, step 204, step 205 in fig. 2, step 206, step 207, step 208, step 209 in fig. 4, and/or other processes for the technology described herein. The communication module 42 is used to support the communication between the air conditioner and other network entities. And a storage module 43 for storing program codes and data of the air conditioner.

The processing module 41 may be the processor in fig. 1. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication module 42 may be the communication interface of fig. 1. The storage module 43 may be the memory of fig. 1.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be essentially or partially contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A dehumidification method of an air conditioner, the method comprising:

after a dehumidification instruction is received, determining that the indoor equipment is in a low-sensible-heat and high-latent-heat load stage, wherein the low-sensible-heat and high-latent-heat load stage is a stage in which indoor required sensible heat is lower than a first value and required latent heat is higher than a second value;

after the compressor operates for a preset time period, acquiring the indoor temperature of the rotating speed, the indoor relative humidity of the rotating speed and the evaporating temperature of the rotating speed in the current rotating speed period; the rotating speed evaporation temperature is obtained through an indoor inlet sensor, and the indoor inlet sensor is arranged at an inlet of a target branch included in the evaporator or at a first U-shaped pipe elbow away from the inlet of the target branch;

determining the rotating speed dew point temperature according to the rotating speed indoor temperature and the rotating speed indoor relative humidity;

determining the target rotating speed of the indoor motor according to the rotating speed indoor relative humidity and the first difference value; the first difference is the difference between the rotating speed dew point temperature and the rotating speed evaporating temperature;

and controlling the indoor motor to dehumidify in the current rotating speed period according to the target rotating speed, wherein the front half part of the target branch is an evaporation section, and the rear half part of the target branch is a superheating section.

2. The dehumidifying method of claim 1, wherein the target rotation speed is greater than or equal to a minimum rotation speed at which the indoor motor can be reliably operated, and is less than or equal to a rotation speed corresponding to a minimum wind speed gear at the time of dehumidification.

3. The dehumidifying method of an air conditioner according to claim 2, wherein the determining the target rotation speed of the indoor motor based on the rotation speed and the indoor relative humidity and the first difference comprises:

if the indoor relative humidity of the rotating speed is greater than the set relative humidity, judging the size of the first difference value;

if the first difference is smaller than a first preset value, subtracting a rotating speed difference from the rotating speed of the indoor motor in the previous period to obtain the target rotating speed;

if the first difference is larger than a second preset value, when the rotating speed of the indoor motor in the previous cycle is determined to be smaller than the rotating speed corresponding to the lowest wind speed gear, adding the rotating speed of the indoor motor in the previous cycle to the rotating speed difference to obtain the target rotating speed;

and if the first difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target rotating speed is the same as the rotating speed of the indoor motor in the previous period.

4. The dehumidifying method of an air conditioner according to claim 3, wherein the method further comprises:

and if the rotating speed indoor relative humidity is less than or equal to the set relative humidity, the target rotating speed is the same as the rotating speed of the indoor motor in the last period.

5. The dehumidification method of an air conditioner according to claim 1, wherein said determining in a low sensible heat high latent heat load phase comprises:

and when the current outdoor temperature is determined to be less than or equal to the preset outdoor temperature, the current indoor relative humidity is determined to be greater than or equal to the preset humidity value, and the difference value between the current indoor temperature and the set temperature is determined to be less than or equal to the preset difference value, determining that the current stage is in the low sensible heat and high latent heat load stage.

6. The dehumidifying method of an air conditioner according to claim 5, wherein the method further comprises:

after the compressor operates for the preset time period, acquiring the opening indoor temperature, the opening indoor relative humidity, the opening evaporation temperature and the overheating temperature of the current opening period; the overheating temperature is obtained through an indoor coil sensor, and the indoor coil sensor is arranged at a U-shaped pipe elbow in the middle of the target branch;

determining an opening dew point temperature according to the opening indoor temperature and the opening indoor relative humidity;

determining a target opening degree of an electronic expansion valve of the outdoor unit according to the second difference value and the third difference value; wherein the second difference is a difference between the opening indoor temperature and the superheat temperature, and the third difference is a difference between the opening dew point temperature and the opening evaporation temperature; the target opening degree of the first opening degree period is obtained according to an initial operation frequency of the compressor, and the initial operation frequency is obtained according to a difference value between the current indoor temperature and the set temperature;

and controlling the electronic expansion valve to be opened according to the target opening degree in the current opening degree period.

7. The dehumidifying method of claim 6, wherein the determining the target opening degree of the electronic expansion valve of the outdoor unit according to the second difference and the third difference comprises:

if the second difference value is smaller than or equal to a third preset value, judging the size of the third difference value;

if the third difference is smaller than a first preset value, subtracting an opening difference from the opening of the electronic expansion valve in the previous period to obtain the target opening;

if the third difference is larger than a second preset value, adding the opening difference to the opening of the electronic expansion valve in the previous cycle to obtain the target opening;

and if the third difference is greater than or equal to the first preset value and less than or equal to the second preset value, the target opening degree is the same as the opening degree of the electronic expansion valve in the previous period.

8. The dehumidifying method of an air conditioner according to claim 7, wherein the method further comprises:

and if the second difference is larger than the third preset value, subtracting the opening difference from the opening of the electronic expansion valve in the previous period to obtain the target opening.

9. An air conditioner, characterized in that the air conditioner comprises: the device comprises a determining unit, an acquiring unit and a control unit;

the determining unit is used for determining that the indoor unit is in a low-sensible-heat and high-latent-heat load stage after a dehumidification instruction is received, wherein the low-sensible-heat and high-latent-heat load stage is a stage in which indoor required sensible heat is lower than a first value and required latent heat is higher than a second value;

the acquisition unit is used for acquiring the indoor temperature, the indoor relative humidity and the evaporation temperature of the rotating speed in the current rotating speed period after the compressor operates for a preset time period; the rotating speed evaporation temperature is obtained through an indoor inlet sensor, and the indoor inlet sensor is arranged at an inlet of a target branch included in the evaporator or at a first U-shaped pipe elbow away from the inlet of the target branch;

the determining unit is further used for determining the rotating speed dew point temperature according to the rotating speed indoor temperature and the rotating speed indoor relative humidity; determining the target rotating speed of the indoor motor according to the rotating speed indoor relative humidity and the first difference value; the first difference is the difference between the rotating speed dew point temperature and the rotating speed evaporating temperature;

and the control unit is used for controlling the indoor motor to dehumidify in the current rotating speed period according to the target rotating speed, wherein the front half part of the target branch is an evaporation section, and the rear half part of the target branch is a superheating section.

10. The air conditioner according to claim 9, wherein the determining unit is specifically configured to:

if the first difference is larger than a second preset value, when the rotating speed of the indoor motor in the previous period is determined to be smaller than the rotating speed corresponding to the lowest wind speed gear, adding the rotating speed of the indoor motor in the previous period to the rotating speed difference to obtain the target rotating speed;

11. The air conditioner according to claim 10,

the determining unit is further configured to determine that the target rotation speed is the same as the rotation speed of the indoor motor in the previous cycle if the rotation speed indoor relative humidity is less than or equal to the set relative humidity.

12. The air conditioner according to claim 9, wherein the determining unit is specifically configured to:

13. The air conditioner according to claim 12,

the obtaining unit is further configured to obtain an opening indoor temperature, an opening indoor relative humidity, an opening evaporation temperature and an overheating temperature of the current opening period after the compressor operates for the preset time period; the overheating temperature is obtained through an indoor coil sensor, and the indoor coil sensor is arranged at a U-shaped pipe elbow in the middle of the target branch;

the determining unit is further used for determining the opening dew point temperature according to the opening indoor temperature and the opening indoor relative humidity; determining a target opening degree of an electronic expansion valve of the outdoor unit according to the second difference value and the third difference value; wherein the second difference is a difference between the opening indoor temperature and the superheat temperature, and the third difference is a difference between the opening dew point temperature and the opening evaporation temperature; the target opening degree of the first opening degree period is obtained according to an initial operation frequency of the compressor, and the initial operation frequency is obtained according to a difference value between the current indoor temperature and the set temperature;

the control unit is further configured to control the electronic expansion valve to be opened according to the target opening degree in the current opening degree period.

14. The air conditioner according to claim 13, wherein the determining unit is specifically configured to:

15. The air conditioner according to claim 14,

the determining unit is further configured to subtract the opening difference from the opening of the electronic expansion valve in the previous cycle to obtain the target opening if the second difference is greater than the third preset value.

16. An air conditioner, characterized in that the air conditioner comprises: a processor, a memory, a communication interface, and a communication bus;

the processor is connected with the memory and the communication interface through the communication bus, the memory is used for storing computer execution instructions, and when the air conditioner is operated, the processor executes the computer execution instructions stored by the memory so as to enable the air conditioner to execute the dehumidification method of the air conditioner according to any one of claims 1 to 8.

17. A computer storage medium, characterized in that the computer storage medium comprises computer-executable instructions that, when run on an air conditioner, cause the air conditioner to perform a dehumidification method of the air conditioner as recited in any one of claims 1 to 8.