CN115854492A

CN115854492A - Multi-connected air conditioner defrosting control method and device, computer equipment and storage medium

Info

Publication number: CN115854492A
Application number: CN202211654965.3A
Authority: CN
Inventors: 焦华超; 武连发; 李华杰; 滕天凤; 高晗; 金孟孟
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-03-28

Abstract

The application relates to a defrosting control method and device for a multi-connected air conditioner, computer equipment, a storage medium and a computer program product. The method comprises the following steps: controlling the air conditioning unit to operate a heating mode according to the initial heating operation parameters and then operating a defrosting mode according to the initial defrosting operation parameters; if the system ratio of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold value, and the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting time length, adjusting heating operation parameters of the operation heating mode according to the system ratio to reduce frosting; and after controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, operating the defrosting mode according to the initial defrosting operation parameters. By adopting the method, the condition that the multi-connected air-conditioning system is not frosted thoroughly can be effectively improved, and the use experience of a user is improved.

Description

Multi-connected air conditioner defrosting control method and device, computer equipment and storage medium

Technical Field

The present application relates to the field of air conditioning technologies, and in particular, to a defrosting control method and apparatus for a multi-connected air conditioner, a computer device, a storage medium, and a computer program product.

Background

The multi-connected air conditioning system consists of one or more outdoor units and a plurality of indoor units, when the multi-connected air conditioning system is used for heating in winter, the surface of an outdoor heat exchanger is easy to frost under the conditions of low temperature and high humidity, and a frost layer can reduce the heating performance of the air conditioning system and even damage air conditioning equipment, so that the frost must be removed in time.

When the system proportion in the multi-connected air conditioning system, namely the ratio of the total indoor unit capacity to the total outdoor unit capacity in the multi-connected air conditioning system is low, the multi-connected air conditioning system is prone to incomplete defrosting and unclean defrosting, so that the unit is prone to frequently triggering the defrosting mode in the subsequent use process, the heating effect is poor, and the use experience of a user is affected.

Disclosure of Invention

Therefore, in order to solve the above technical problems, a defrosting control method and apparatus for a multi-connected air conditioner, a computer device, a computer readable storage medium, and a computer program product are provided, which can improve incomplete defrosting of the multi-connected air conditioner system and improve user experience.

In a first aspect, the present application provides a defrosting control method for a multi-connected air conditioner, where the method includes:

controlling the air conditioning unit to operate a heating mode according to the initial heating operation parameters and then operating a defrosting mode according to the initial defrosting operation parameters;

if the system ratio of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold value, and the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting operation time length, adjusting heating operation parameters of the heating mode according to the system ratio to reduce frosting;

and controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the initial defrosting operation parameters.

In one embodiment, after the step of operating the defrosting mode with the initial defrosting operation parameter after the step of controlling the air conditioning unit to operate the heating mode with the adjusted heating operation parameter, the method further includes:

if the defrosting operation time of the current defrosting mode is equal to the maximum defrosting operation time, the defrosting operation parameters of the defrosting mode are adjusted step by step according to the system proportion to improve the defrosting performance, and the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, and then operate the defrosting mode according to the adjusted defrosting operation parameters until the defrosting operation time of the defrosting mode is shorter than the maximum defrosting operation time.

In one embodiment, the step-by-step adjusting defrosting operation parameters for operating the defrosting mode according to the system ratio to improve defrosting performance, and after controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, operating the defrosting mode according to the adjusted defrosting operation parameters until a defrosting operation duration for operating the defrosting mode is shorter than the maximum defrosting duration includes:

increasing the operating frequency of the compressor in the defrosting operation mode according to the system proportion;

controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the adjusted defrosting operation parameters; the adjusted defrosting operation parameter comprises an adjusted compressor operation frequency;

and if the defrosting operation time length of the current defrosting mode is shorter than the maximum defrosting operation time length, returning to the step of controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and then operating the defrosting mode according to the initial defrosting operation parameters.

In one embodiment, the method further comprises:

if the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting time length, increasing the maximum defrosting time length according to the system proportion;

controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the adjusted defrosting operation parameters; the adjusted defrosting operation parameters comprise the adjusted maximum defrosting time and the adjusted compressor operation frequency;

and if the defrosting operation time length of the current defrosting mode is less than the adjusted maximum defrosting operation time length, returning to the step of controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and then operating the defrosting mode according to the initial defrosting operation parameters.

In one embodiment, the method further comprises:

and if the running time of the current defrosting mode is equal to the adjusted maximum defrosting time, returning to the step of increasing the maximum defrosting time according to the system proportion until the defrosting running time is less than the maximum defrosting time.

In one embodiment, the heating operation parameter is a heating operation time length;

adjusting heating operation parameters for operating the heating mode according to the system proportion to reduce frosting, comprising:

and reducing the heating operation time of the heating mode according to the system proportion.

In one embodiment, the reducing the heating operation duration of the heating mode according to the system configuration ratio includes:

determining an adjusting coefficient of heating operation duration according to the system proportion;

obtaining the adjusted heating operation time length based on the adjustment coefficient and the initial heating operation time length; wherein the larger the system proportion is, the smaller the adjustment coefficient is.

In one embodiment, the increasing the operating frequency of the compressor in the defrosting operation mode according to the system ratio comprises:

determining a frequency adjustment value of the compressor in the defrosting operation mode according to the system ratio;

obtaining an adjusted compressor running frequency based on the frequency adjustment value and the initial running frequency of the compressor in the defrosting running mode; wherein the larger the system proportion is, the smaller the frequency adjustment value is.

In one embodiment, the increasing the maximum defrosting time according to the system ratio includes:

determining a defrosting time length adjusting value according to the system ratio;

obtaining the adjusted maximum defrosting time length based on the defrosting time length adjusting value and the maximum defrosting time length; wherein the larger the system proportion is, the smaller the defrosting time length adjusting value is.

In one embodiment, the increasing the maximum defrosting time length according to the system proportion comprises:

obtaining the adjusted maximum defrosting time length based on the defrosting time length adjusting value, the maximum defrosting time length and the adjusting times of the maximum defrosting time length; wherein the larger the system proportion is, the smaller the defrosting time length adjusting value is.

In a second aspect, the present application further provides a multiple air conditioner defrosting control device, including:

the system comprises an initial control module, a defrosting module and a control module, wherein the initial control module is used for controlling the air conditioning unit to operate a heating mode according to an initial heating operation parameter and then operate a defrosting mode according to an initial defrosting operation parameter;

the defrosting condition judging module is used for adjusting heating operation parameters for operating the heating mode according to the system proportion to reduce frosting if the system proportion of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset proportion threshold value and the defrosting operation time of the current defrosting mode is equal to the maximum defrosting operation time;

and the defrosting control module is used for controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters and then operate the defrosting mode according to the initial defrosting operation parameters.

In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

In a fourth aspect, the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.

In a fifth aspect, the present application also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of the method described above.

According to the multi-connected air conditioner defrosting control method, the multi-connected air conditioner defrosting control device, the computer equipment, the storage medium and the computer program product, if the system ratio of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than the preset ratio threshold value, and the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, the heating capacity of the indoor units in the multi-connected air conditioner system is smaller than the refrigerating capacity of the outdoor units, when the preset maximum defrosting time is reached, the frost layer of the outdoor units is still not cleaned, and at the moment, the multi-connected air conditioner system has the phenomenon of incomplete defrosting. The controller of the multi-connected air conditioning system adjusts heating operation parameters of an operation heating mode according to a system ratio, the adjusted heating operation parameters are made to accord with the total capacity distribution condition of an indoor unit and an outdoor unit of the multi-connected air conditioning system at present, the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, and a defrosting mode is operated according to the initial defrosting operation parameters, so that the frosting condition of the outdoor unit in the next operation can be reduced, the number of frost layers in the next defrosting process is reduced, defrosting is more thorough, the condition that the multi-connected air conditioning system is not thorough in defrosting is effectively improved, and the use experience of a user is improved.

Drawings

FIG. 1 is a schematic diagram of a multi-connected air conditioning system according to an embodiment;

FIG. 2 is a schematic flow chart of a defrosting control method of a multi-connected air conditioner in one embodiment;

FIG. 3 is a schematic flow chart of a defrosting control method of a multi-connected air conditioner in another embodiment;

fig. 4 is a schematic flow chart illustrating steps of adjusting defrosting operation parameters of the defrosting operation mode step by step according to the system ratio to improve defrosting performance, and controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting operation mode according to the adjusted defrosting operation parameters until the defrosting operation time of the defrosting operation mode is shorter than the maximum defrosting time;

FIG. 5 is a schematic flow chart of a defrosting control method for a multi-connected air conditioner in yet another embodiment;

FIG. 6 is a schematic flow chart illustrating a defrosting control method of a multi-connected air conditioner according to still another embodiment;

FIG. 7 is a block diagram of a defrosting control device of a multi-connected air conditioner in one embodiment;

FIG. 8 is a diagram of an internal structure of a computer device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

The defrosting control method for the multi-connected air conditioner provided by the embodiment of the application can be applied to the multi-connected air conditioner system shown in fig. 1. The controller 102 is connected to the air conditioning units 104 in the multi-split air conditioning system. The data storage system may store data that the controller 102 needs to process. The data storage system may be integrated on the controller 102 or may be located on the cloud or other network server. The controller 102 controls the air conditioning units 104 in the multi-connected air conditioning system to operate in the heating mode according to the initial heating operation parameters, and then operates in the defrosting mode according to the initial defrosting operation parameters, if the system ratio of the total indoor unit capacity to the total outdoor unit capacity of the multi-connected air conditioning system is lower than a preset ratio threshold value, and the defrosting operation duration of the current defrosting mode is equal to the maximum defrosting duration, the heating operation parameters of the heating mode are adjusted according to the system ratio to reduce frosting, and the air conditioning units 104 are controlled to operate in the heating mode according to the adjusted heating operation parameters, and then operate in the defrosting mode according to the initial defrosting operation parameters. The controller 102 may be any control chip capable of performing logic processing, such as logic control. The air conditioning unit 104 includes a plurality of indoor units and one or more outdoor units.

In one embodiment, as shown in fig. 2, a defrosting control method for a multi-connected air conditioner is provided, which is described by taking the method as an example applied to the controller in fig. 1, and includes the following steps:

step 202, after controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters, operating the defrosting mode according to the initial defrosting operation parameters.

The initial heating operation parameters are preset operation parameters of the multi-connected air conditioning system in a heating operation mode, and are set by designers in advance according to user requirements and actual specification parameters of the unit. The initial defrosting operation parameters are preset operation parameters of a defrosting mode of the multi-connected air conditioning system, and are set by a designer in advance according to an actual configuration environment of the multi-connected air conditioning system configured by a user and actual specification parameters of a unit. It can be understood that the initial heating operation parameter and the initial defrosting operation parameter may be fixed preset parameters, or preset parameters that are periodically changed according to actual environmental factors, such as season, ambient temperature, and the like.

The heating mode is an air-conditioning operation mode used for improving the indoor environment temperature of the indoor unit, when the multi-connected air-conditioning system operates in the heating mode, a refrigerant in the system is pressurized by the compressor to form high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the condenser in the indoor unit of the air-conditioning unit to be condensed, liquefied and released to form liquid, and meanwhile, indoor air is heated, so that the purpose of improving the indoor temperature is achieved.

The defrosting mode is also called reverse refrigeration defrosting, and is a common defrosting mode in air conditioners. In the area with lower outdoor environment temperature, when the air conditioner operates in a heating mode, the temperature of fins of the outdoor heat exchanger is lower, condensed water can be condensed into solid small ice crystals, and then frost is formed on the outdoor heat exchanger, when a frost layer reaches a certain thickness, the heat exchange effect of the air conditioning system can be greatly reduced, and hazards of frequent defrosting, energy consumption increase, damage to operation of the heat pump and the like can be caused. In order to defrost the outdoor heat exchanger, a four-way valve is added on a refrigerating system by a designer, when the condition that the air-conditioning system meets the defrosting condition is detected, the four-way valve is switched to be switched from a heating state to a refrigerating state, the outdoor heat exchanger is in heat dissipation, and the heat exchanger is defrosted by using the heat dissipated heat, so that a frost layer on fins of the outdoor heat exchanger is removed.

Specifically, the controller controls the air conditioning units in the multi-connected air conditioning system to operate in the heating mode according to the initial heating operation parameters to meet the heating requirements of users, and when the controller monitors that the multi-connected air conditioning system meets defrosting operation conditions, the controller controls the air conditioning units in the multi-connected air conditioning system to operate in the defrosting mode according to the initial defrosting operation parameters to perform defrosting treatment on the outdoor heat exchanger.

And 204, if the system ratio of the total capacity of the indoor units to the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold value, and the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting time length, adjusting the heating operation parameters of the operation heating mode according to the system ratio to reduce frosting.

The total capacity of the indoor units and the total capacity of the outdoor units in the multi-connected air-conditioning system can respectively represent the total heating capacity of the indoor units and the total cooling capacity of the outdoor units, and the ratio of the total capacity of the indoor units to the total capacity of the outdoor units is the system ratio of the multi-connected air-conditioning system. It can be understood that the higher the system proportion is, the higher the total capacity of the indoor units in the multi-connected air conditioning system is, and the larger the total heating capacity of the system is.

The preset proportioning threshold is a preset threshold used for representing whether the total capacity of indoor units and the total capacity distribution of outdoor units in the current multi-connected air-conditioning system meet the heat requirement of thorough defrosting. If the system proportion of the multi-connected air-conditioning system is higher than the preset proportion threshold value, the distribution of the total capacity of the indoor units and the total capacity of the outdoor units in the multi-connected air-conditioning system can meet the heat demand of thorough defrosting of the system, and when the system runs in a defrosting mode, frost layers on the outdoor heat exchanger can be completely removed by the heat provided by the indoor units.

If the system proportion of the multi-connected air-conditioning system is lower than the preset proportion threshold value, it can be considered that the distribution of the total capacity of the indoor units and the total capacity of the outdoor units in the multi-connected air-conditioning system cannot meet the heat requirement for complete defrosting of the system at the moment, and when the system runs in a defrosting mode, the frost layer on the outdoor heat exchanger cannot be completely removed by the heat provided by the indoor units.

The maximum defrosting time is an operation time threshold of the multi-connected air conditioning system in the operation defrosting mode, and when the actual defrosting time of the multi-connected air conditioning system in the operation defrosting mode reaches the maximum defrosting time, the controller controls the air conditioning unit to forcibly exit the defrosting mode, so that the condition that the indoor environment temperature fluctuation is large due to overlong defrosting time and the user experience is influenced is prevented. It can be understood that, in a complete defrosting period, the maximum defrosting time when the air conditioning unit operates the defrosting mode for the first time may also be referred to as an initial maximum defrosting time, and the initial maximum defrosting time is obtained according to the outdoor side ambient temperature. In a complete defrosting period, the heating mode and the defrosting mode can be run for multiple times in a bottom-crossed mode until the frost layer on the outdoor heat exchanger is completely removed. In a complete defrosting period, the maximum defrosting time can be dynamically changed according to the actual defrosting condition, so that the complete defrosting effect is better realized.

In one embodiment, the controller obtains the outdoor side environment temperature of the outdoor environment where the current multi-connected air conditioning system is located, queries a preset operation duration mapping table according to the outdoor side environment temperature to obtain the maximum defrosting duration corresponding to the outdoor side environment temperature, and determines the maximum defrosting duration as the initial maximum defrosting duration.

The heating operation parameters are operation parameters required for controlling the air conditioning unit to operate in the heating mode, the heating operation parameters can influence the heating effect of the air conditioning unit in the heating mode, and the heating effect achieved by controlling the air conditioning unit to operate in the heating mode according to different heating operation parameters is different. The heating operation parameter may be any operation parameter that can affect the heating effect of the air conditioner, such as heating operation duration, heating operation frequency, fan gear during heating operation, and the like.

Specifically, the controller obtains the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner, and obtains the system ratio of the multi-connected air conditioner system according to the ratio of the total capacity of the indoor units to the total capacity of the outdoor units. Calling a preset ratio threshold, comparing the system ratio with the preset ratio threshold, if the system ratio is lower than the preset ratio threshold, and the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, it indicates that the distribution of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-split air-conditioning system cannot meet the heat requirement of complete defrosting of the system, the air-conditioning unit cannot completely remove frost layers on the outdoor heat exchanger within the maximum defrosting time, and the multi-split air-conditioning unit is forced to exit from the defrosting mode within the maximum defrosting time.

The controller adjusts heating operation parameters of the operation heating mode according to the system proportion, so that the adjusted heating operation parameters conform to the total capacity distribution condition of the indoor unit and the outdoor unit of the current multi-split air-conditioning system, and the effect of reducing the frost layer thickness of the outdoor heat exchanger can be achieved.

In one embodiment, the controller may determine the adjusted heating operation parameter based on the system configuration ratio according to a preset mapping relationship between the system configuration ratio and the heating operation parameter, and update the adjusted heating operation parameter to the heating operation parameter in the heating mode.

And step 206, controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the initial defrosting operation parameters.

Specifically, the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, so that the frosting condition of the outdoor unit is reduced, the air conditioning unit is controlled to operate the defrosting mode according to the initial defrosting operation parameters, and because the frosting condition of the outdoor unit is reduced during defrosting, the defrosting of the air conditioning unit is more thorough during the defrosting mode.

In the defrosting control method for the multi-connected air conditioner, if the system ratio of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold value, and the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, it is indicated that the heating capacity of the indoor units in the multi-connected air conditioner is smaller than the refrigerating capacity of the outdoor units, and when the preset maximum defrosting time is reached, the frost layer of the outdoor units is still not cleaned, so that the multi-connected air conditioner has the phenomenon of incomplete defrosting. The controller of the multi-connected air conditioning system adjusts heating operation parameters of an operation heating mode according to a system ratio, the adjusted heating operation parameters are made to accord with the total capacity distribution condition of an indoor unit and an outdoor unit of the multi-connected air conditioning system at present, the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, and a defrosting mode is operated according to the initial defrosting operation parameters, so that the frosting condition of the outdoor unit in the next operation can be reduced, the number of frost layers in the next defrosting process is reduced, defrosting is more thorough, the condition that the multi-connected air conditioning system is not thorough in defrosting is effectively improved, and the use experience of a user is improved.

Further, in one embodiment, when the heating operation parameter is heating operation long, adjusting the heating operation parameter of the heating mode according to the system configuration ratio to reduce frosting includes: and reducing the heating operation time of the operation heating mode according to the system proportion.

The heating operation time is the time when the controller controls the air conditioning unit to operate the heating mode, and the adjustment of the heating operation time can influence the heating effect of the indoor environment temperature and the frosting condition of the outdoor heat exchanger of the outdoor unit. It can be understood that the longer the heating operation time, the thicker the frost layer frosted on the outdoor heat exchanger of the outdoor unit.

Specifically, when the system ratio is lower than a preset ratio threshold, and the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting operation time length, the controller reduces the heating operation time length of the heating mode according to the system ratio, and determines the reduced heating operation time length as the adjusted heating operation time length. By reducing the heating operation time, the frosting condition of the outdoor heat exchanger of the outdoor unit can be effectively reduced, and the frost layer thickness of the outdoor heat exchanger is reduced.

In one embodiment, reducing the heating operation duration of the heating mode according to the system configuration comprises: determining an adjusting coefficient of heating operation duration according to the system proportion; obtaining the adjusted heating operation time length based on the adjustment coefficient and the initial heating operation time length; wherein, the larger the system proportion is, the smaller the adjustment coefficient is.

The adjusting coefficient is a preset coefficient used for adjusting the heating operation time length, and is determined according to the system proportion.

In one embodiment, a designer may determine a corresponding heating operation duration adjustment coefficient in advance according to a system configuration ratio, and configure the system configuration ratio and the adjustment coefficient in a storage library of a controller after being correspondingly bound, and the controller may determine the corresponding heating operation duration adjustment coefficient according to the system configuration ratio of the multi-split air conditioning system.

In one embodiment, a designer may set a preset proportioning interval for an air conditioning unit in advance, set a corresponding heating operation time length adjustment coefficient for each preset proportioning interval, bind the preset proportioning interval and the adjustment coefficient, and configure the bound preset proportioning interval and the adjustment coefficient in a storage library of a controller. The controller determines a matching interval to which the system matching belongs according to the calculated system matching, and obtains an adjustment coefficient of the heating operation time length based on the matching interval to which the system matching belongs.

For example, when the system ratio is 55, the controller determines that the section corresponding to the system ratio is a first ratio section [50,60] according to the system ratio, and then determines a first adjustment coefficient corresponding to the first ratio section as an adjustment coefficient of the heating operation time length.

It can be understood that the adjustment coefficient is a calculation coefficient smaller than 1, and the larger the system proportion is, the larger the total heating amount of the indoor units in the multi-connected air conditioning system is, the better the defrosting effect is, and even if the time for reducing the heating operation time is shorter, the better the defrosting effect can be obtained, so the adjustment coefficient is smaller.

Specifically, the controller determines an adjustment coefficient of heating operation time according to the calculated system ratio of the multi-connected air-conditioning system, and calculates the adjusted heating operation time based on the adjustment coefficient and the initial heating operation time, so that the adjusted heating operation time conforms to the total capacity distribution condition of the indoor unit and the outdoor unit of the current multi-connected air-conditioning system, and the air-conditioning unit is controlled to operate the heating mode in the adjusted heating operation time, thereby reducing the frosting condition of the outdoor unit in the next operation, reducing the number of frost layers in the next defrosting operation, enabling the defrosting to be more thorough, effectively improving the incomplete defrosting condition of the multi-connected air-conditioning system, and improving the user experience.

When the air conditioning unit actually operates, if the frost layer of the outdoor heat exchanger is thick, the purpose of completely defrosting may not be achieved by simply adjusting the heating operation parameters of the air conditioning unit.

Based on this, in one embodiment, as shown in fig. 3, a defrosting control method for a multi-connected air conditioner is provided, which includes the following steps:

and 302, controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and then operating the defrosting mode according to the initial defrosting operation parameters.

And 304, if the system ratio of the total capacity of the indoor units to the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold value, and the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting time length, adjusting the heating operation parameters of the operation heating mode according to the system ratio to reduce frosting.

And step 306, controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the initial defrosting operation parameters.

Specifically, the embodiments of step 302 to step 306 are substantially the same as the embodiments of step 202 to step 206, and are not described herein again.

And 308, if the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, adjusting the defrosting operation parameters of the running defrosting mode step by step according to the system proportion so as to improve the defrosting performance.

The defrosting operation parameters are operation parameters required for controlling the air conditioning unit to operate in the defrosting mode, the defrosting operation parameters can influence the defrosting effect of the air conditioning unit in the defrosting mode, the air conditioning unit is controlled to operate in the defrosting mode according to different defrosting operation parameters, and the defrosting effects which can be achieved are different. It can be understood that the defrosting operation parameter may be any one of operation parameters that can affect the defrosting effect of the air conditioner, such as a maximum defrosting time, a compressor frequency, a fan gear during defrosting operation, and the like.

Specifically, after the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, the air conditioning unit is controlled to operate the defrosting mode according to the initial defrosting operation parameters, the defrosting operation time of the air conditioning unit operating the defrosting mode is recorded, if the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, the air conditioning unit still cannot remove all frost layers on the outdoor heat exchanger within the maximum defrosting time, and the effect of completely defrosting cannot be achieved by simply adjusting the heating operation parameters.

The controller adjusts defrosting operation parameters of the defrosting operation mode step by step according to the system proportion, so that the adjusted defrosting operation parameters conform to the total capacity distribution condition of the indoor unit and the outdoor unit of the current multi-split air conditioning system, and the effect of completely defrosting the frost layer of the outdoor heat exchanger can be achieved.

And 310, after controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, operating the defrosting mode according to the adjusted defrosting operation parameters until the defrosting operation time length of the defrosting mode is less than the maximum defrosting time length.

Specifically, the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters and operate the defrosting mode according to the adjusted defrosting operation parameters until the defrosting operation time of the defrosting mode is shorter than the maximum defrosting time, namely, complete defrosting is completed.

In the above embodiment, when the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and after the defrosting mode is operated according to the initial defrosting operation parameters, the defrosting operation time of the defrosting mode is still equal to the maximum defrosting time length, the controller adjusts the defrosting operation parameters of the air conditioning unit operating the defrosting mode step by step according to the system ratio to improve the defrosting performance, and then controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and operates the defrosting mode according to the adjusted defrosting operation parameters.

Further, in an embodiment, as shown in fig. 4, after the defrosting operation parameter of the defrosting operation mode is adjusted step by step according to the system ratio to improve the defrosting performance, and the air conditioning unit is controlled to operate the heating operation mode according to the adjusted heating operation parameter, the defrosting operation mode is operated according to the adjusted defrosting operation parameter until the defrosting operation time length of the defrosting operation mode is less than the maximum defrosting time length, including:

and 402, increasing the running frequency of the compressor in the defrosting running mode according to the system ratio.

Wherein, when the operation of air conditioner unit changes the frost mode, the indoor fan defaults to be in the off-state, consequently, increases the operating frequency of compressor under the frost mode, can effectively increase the heat that is used for outdoor heat exchanger to be used for the defrosting, also can not lead to user's indoor ambient temperature to change too greatly simultaneously.

Specifically, the controller increases the operating frequency of the compressor in the defrosting operation mode according to the system proportion, and takes the increased operating frequency of the compressor as the adjusted operating frequency of the compressor. It can be understood that the operation frequency of the compressor is required to be less than or equal to the preset maximum operation frequency, and the influence on the operation reliability of the air conditioning unit is avoided.

Step 404, controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the adjusted defrosting operation parameters; the adjusted defrost operating parameters include an adjusted compressor operating frequency.

Specifically, the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters to provide heat for the indoor environment of a user, and when the defrosting condition is achieved, the controller controls the air conditioning unit to operate the defrosting mode according to the adjusted compressor operation frequency.

And 406, if the defrosting operation time length of the current defrosting mode is less than the maximum defrosting operation time length, returning to the step of controlling the air conditioning unit to operate the heating mode by the initial heating operation parameters and then operating the defrosting mode by the initial defrosting operation parameters.

Specifically, when the controller controls the air conditioning unit to operate the defrosting mode at the adjusted compressor operation frequency, acquiring defrosting operation time of the current defrosting mode of the air conditioning unit, and if the defrosting operation time of the current defrosting mode is shorter than the maximum defrosting time, indicating that the frost layer of the outdoor heat exchanger is completely removed within the maximum defrosting time when the defrosting mode operates, in order to better meet the use requirements of users, the controller returns to the step of controlling the air conditioning unit to operate the heating mode with the initial heating operation parameters and operate the defrosting mode with the initial defrosting operation parameters.

In this embodiment, when the controller simply adjusts the heating operation parameters of the heating mode and still cannot achieve the effect of complete defrosting, the controller increases the operation frequency of the compressor in the defrosting operation mode according to the system ratio, controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and operates the defrosting mode according to the adjusted operation frequency of the compressor, thereby achieving the effect of complete defrosting. And under the condition that the frost layer of the outdoor heat exchanger is completely removed by determining the defrosting mode operated at the adjusted operating frequency of the compressor, the controller returns to the operation step of controlling the air conditioning unit to operate the heating mode by the initial heating operation parameters and controlling the unit to operate the defrosting mode by the initial defrosting operation parameters, so that the use requirements of users can be effectively met, and the use experience of the users is improved.

Further, in one embodiment, increasing the operating frequency of the compressor in the defrosting operation mode according to the system ratio includes: determining a frequency adjustment value of the compressor in a defrosting operation mode according to the system ratio; obtaining the adjusted running frequency of the compressor based on the frequency adjustment value and the initial running frequency of the compressor in the defrosting running mode; wherein, the larger the system proportion is, the smaller the frequency adjustment value is.

The frequency adjusting value is a preset numerical value used for adjusting the running frequency of the compressor in the defrosting mode, and the frequency adjusting value is determined according to the system proportion. When the initial operation frequency is the defrosting mode of the operation of the multi-connected air conditioning system, the operation frequency parameters of the compressor are preset, and the initial operation frequency is set by a designer according to the actual configuration environment of the multi-connected air conditioning system configured by a user and the actual specification parameters of the unit.

In one embodiment, a designer may determine, in advance, a frequency adjustment value of an operating frequency of the compressor in the corresponding defrosting mode according to the system configuration ratio, and configure the system configuration ratio and the frequency adjustment value in a storage library of the controller after the system configuration ratio and the frequency adjustment value are correspondingly bound, and the controller may determine, according to the system configuration ratio of the multi-split air conditioning system, the frequency adjustment value of the operating frequency of the compressor in the corresponding defrosting mode.

In one embodiment, a designer may set a preset proportioning interval for the air conditioning unit in advance, set a frequency adjustment value of the operating frequency of the compressor in the corresponding defrosting mode for each preset proportioning interval, bind the preset proportioning interval and the frequency adjustment value, and configure the bound preset proportioning interval and frequency adjustment value in a storage library of the controller. The controller determines a proportioning interval to which the system proportioning belongs according to the calculated system proportioning, and obtains a frequency adjustment value of the running frequency of the compressor in the defrosting mode based on the proportioning interval to which the system proportioning belongs.

For example, when the system ratio is 65, the controller determines that the section corresponding to the system ratio is a second ratio section (60, 70) according to the system ratio, and determines a second frequency adjustment value corresponding to the second ratio section as a frequency adjustment value of the operating frequency of the compressor in the defrosting mode.

It can be understood that the larger the system proportion is, the larger the total heating capacity of the indoor units in the multi-connected air conditioning system is, the better the defrosting effect is, and even if the increment of the running frequency of the compressor is less, the better the defrosting effect can be obtained, so the frequency adjustment value is smaller.

Specifically, the controller determines a frequency adjustment value of the operating frequency of the compressor in the defrosting mode according to the calculated system ratio of the multi-connected air conditioning system, calculates the sum of the frequency adjustment value and the initial operating frequency of the compressor in the defrosting mode to obtain the adjusted operating frequency of the compressor, improves the defrosting performance of the air conditioning unit, effectively improves the condition that the multi-connected air conditioning system is not thoroughly frosted, and improves the use experience of a user.

In actual operation of the air conditioning unit, if the heating operation parameters of the air conditioning unit and the operation frequency of the compressor in the defrosting mode are adjusted, the purpose of complete defrosting still cannot be achieved, in an embodiment, as shown in fig. 5, after the air conditioning unit is controlled to operate the heating mode with the adjusted heating operation parameters, the defrosting mode is operated with the adjusted defrosting operation parameters; after the step that the adjusted defrosting operation parameters comprise the adjusted compressor operation frequency, the multi-connected air conditioner defrosting control method further comprises the following steps:

step 502, if the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, the maximum defrosting time is increased according to the system proportion.

Specifically, after the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, the defrosting mode is operated according to the adjusted defrosting operation parameters, the defrosting time of the defrosting mode is recorded, and if the defrosting time of the current defrosting mode is still equal to the maximum defrosting time, it indicates that the air conditioning unit still cannot complete defrosting of the outdoor heat exchanger within the maximum defrosting time even if the heating operation parameters and the operation frequency of the compressor in the defrosting mode are adjusted. At the moment, the controller increases the maximum defrosting time of the defrosting mode according to the system proportion so as to achieve the effect of increasing the defrosting operation time of the defrosting mode.

Step 504, after controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, operating the defrosting mode according to the adjusted defrosting operation parameters; the adjusted defrosting operation parameters comprise the adjusted maximum defrosting time and the adjusted compressor operation frequency.

Specifically, the controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, so that the heating requirement of a user is met, and when the defrosting operation condition is met, the air conditioning unit is controlled to operate the defrosting mode according to the adjusted maximum defrosting time and the adjusted compressor operation frequency, so that defrosting is performed on the outdoor heat exchanger.

And 506, if the defrosting operation time of the current defrosting mode is shorter than the adjusted maximum defrosting operation time, returning to the step of controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and then operating the defrosting mode according to the initial defrosting operation parameters.

Specifically, when the controller controls the air conditioning unit to operate the defrosting mode according to the adjusted maximum defrosting time and the adjusted compressor operation frequency, acquiring the defrosting operation time of the current defrosting mode of the air conditioning unit, and if the defrosting operation time of the current defrosting mode is less than the maximum defrosting time, indicating that the frost layer of the outdoor heat exchanger is completely removed in the adjusted maximum defrosting time when the defrosting mode operates, and in order to better meet the use requirements of users, the controller returns to the step of controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and operate the defrosting mode according to the initial defrosting operation parameters.

In this embodiment, when the controller adjusts the heating operation parameters of the heating mode and the operation frequency of the compressor of the defrosting mode, but still cannot achieve the effect of complete defrosting, the maximum defrosting time of the defrosting mode is increased according to the system ratio, the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, and the defrosting mode is operated according to the adjusted maximum defrosting time and the adjusted operation frequency of the compressor, so that the effect of complete defrosting is achieved. And under the condition that the frost layer of the outdoor heat exchanger is completely removed by determining the defrosting mode operated at the adjusted operating frequency of the compressor, the controller returns to the operation step of controlling the air conditioning unit to operate the heating mode by the initial heating operation parameters and controlling the unit to operate the defrosting mode by the initial defrosting operation parameters, so that the use requirements of users can be effectively met, and the use experience of the users is improved.

Further, in one embodiment, increasing the maximum defrosting time according to the system proportion comprises: determining a defrosting time length adjusting value according to the system ratio; obtaining the adjusted maximum defrosting time length based on the defrosting time length adjusting value and the maximum defrosting time length; wherein, the larger the system proportion is, the smaller the defrosting time length adjustment value is.

The defrosting time length adjusting value is a preset adjusting parameter used for adjusting the maximum defrosting time length of the defrosting mode, and is determined according to the system proportion.

In one embodiment, a designer may determine a corresponding defrosting time adjustment value in advance according to a system configuration ratio, and configure the system configuration ratio and the defrosting time adjustment value in a storage library of a controller after the system configuration ratio and the defrosting time adjustment value are correspondingly bound, and the controller may determine the corresponding defrosting time adjustment value according to the system configuration ratio of the multi-connected air conditioning system.

In one embodiment, a designer may set a preset proportioning interval for an air conditioning unit in advance, set a corresponding defrosting time adjustment value for each preset proportioning interval, and configure the preset proportioning interval and the defrosting time adjustment value in a storage library of a controller after binding. The controller determines a matching interval to which the system matching belongs according to the calculated system matching, and obtains a defrosting time length adjusting value based on the matching interval to which the system matching belongs.

For example, when the system ratio is 75, the controller determines that the section corresponding to the system ratio is a third ratio section (60, 70) according to the system ratio, and determines a third defrosting time length adjusting value corresponding to the third ratio section as a defrosting time length adjusting value of the maximum defrosting time length.

It can be understood that the larger the system proportion is, the larger the total heating amount of the indoor units in the multi-connected air conditioning system is, the better the defrosting effect is, and even if the increase of the maximum defrosting time duration is less, the better the defrosting effect can be achieved, so that the larger the system proportion is, the smaller the defrosting time duration adjustment value is.

Specifically, the controller determines a defrosting time length adjusting value which is the maximum defrosting time length of the defrosting mode according to the calculated system ratio of the multi-connected air conditioning system, and calculates the sum of the defrosting time length adjusting value and the maximum defrosting time length to obtain the adjusted maximum defrosting time length. The air conditioning unit is controlled to operate the defrosting mode according to the adjusted maximum defrosting time, so that the defrosting performance of the air conditioning unit is improved, the condition that a multi-connected air conditioning system is not thoroughly defrosted is effectively improved, and the use experience of a user is improved.

Further, in one embodiment, after the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, the defrosting mode is operated according to the adjusted defrosting operation parameters; after the step that the adjusted defrosting operation parameters comprise the adjusted maximum defrosting time length and the adjusted compressor operation frequency, the defrosting control method of the multi-connected air conditioner further comprises the following steps:

Specifically, when the controller controls the air conditioning unit to operate the defrosting mode at the adjusted maximum defrosting time and the adjusted compressor operating frequency, the defrosting operation time of the current defrosting mode of the air conditioning unit is obtained, and if the defrosting operation time of the current defrosting mode is still equal to the adjusted maximum defrosting time, it indicates that the air conditioning unit still cannot complete defrosting of the outdoor heat exchanger within the adjusted maximum defrosting time even if the maximum defrosting time is initially adjusted. At the moment, the controller returns to the step of increasing the maximum defrosting time according to the system ratio, and the maximum defrosting time of the running defrosting mode is continuously increased according to the system ratio until the defrosting running time is less than the maximum defrosting time, namely the aim of complete defrosting is fulfilled.

In this embodiment, after the heating operation parameters, the operation frequency of the defrosting mode compressor, and the maximum defrosting time are adjusted, if the purpose of complete defrosting cannot be achieved, the maximum defrosting time of the defrosting mode is adjusted in a circulating manner until the defrosting operation time is shorter than the maximum defrosting time, that is, the purpose of complete defrosting is achieved, by adjusting the maximum defrosting time in a circulating manner, it is ensured that a frost layer of the outdoor heat exchanger is completely removed, continuous accumulation of the frost layer due to incomplete defrosting is avoided, the defrosting mode is easily and frequently triggered in a subsequent use process of the unit, the heating effect is poor, and the use experience of a user is affected.

Further, in one embodiment, increasing the maximum defrosting time according to the system proportion comprises: determining a defrosting time length adjusting value according to the system ratio; obtaining the adjusted maximum defrosting time length based on the defrosting time length adjusting value, the maximum defrosting time length and the adjusting times of the maximum defrosting time length; wherein, the larger the system proportion is, the smaller the defrosting time length adjustment value is.

The adjustment times of the maximum defrosting time length are the times of adjusting the maximum defrosting time length in the current complete defrosting period.

Specifically, the controller determines a defrosting time length adjusting value corresponding to the system ratio according to the system ratio, and obtains the adjusted maximum defrosting time length based on the defrosting time length adjusting value, the initial maximum defrosting time length and the adjusting times of the maximum defrosting time length. For example, if the maximum defrosting time period number is 2, the defrosting time period adjustment value is Δ T and is T _{Defrosting cream} The adjusted maximum defrosting time length T _{Adjustment of} ＝T _{Defrosting cream} +2×△t。

The air conditioning unit is controlled to operate the defrosting mode according to the adjusted maximum defrosting time, the defrosting performance of the air conditioning unit is improved, the condition that a multi-connected air conditioning system is not thorough in defrosting is effectively improved, and the user experience is improved.

In an embodiment, as shown in fig. 6, a defrosting control method for a multi-connected air conditioner is provided, and the method is applied to a multi-connected air conditioner system with a low system ratio, specifically, after an air conditioning unit of the multi-connected air conditioner system is installed, a commissioning phase is performed, a system controller detects conditions of indoor units and outdoor units of the air conditioning unit, and a system ratio of the multi-connected air conditioner system is calculated according to total capacity of the indoor units and total capacity of the outdoor units in the multi-connected air conditioner system. Obtaining a preset proportioning threshold P _{Preset of} The system ratio P is compared with a preset ratio threshold value P _{Preset of} Comparing if P is less than P _{Preset of} And the system proportion of the multi-connected air conditioning system is considered to be low.

The defrosting control method of the multi-connected air conditioner specifically comprises the following steps:

firstly, the controller responds to the heating requirement of a user and controls the air conditioning unit to initially heat the operation time length T _{Operation of} The heating mode is operated, when the air conditioning unit meets the running condition of the defrosting mode, the air conditioning unit is controlled to run the defrosting mode according to the initial defrosting running parameters, and the defrosting time T of the air conditioning unit running defrosting mode is recorded _{Practice of} The defrosting operation parameters comprise compressor operation frequency F and maximum defrosting time T in a defrosting mode _{Defrosting cream} Maximum frost time T _{Defrosting cream} And determining according to the outdoor ambient temperature of the air conditioning unit during heating operation.

The controller will defrost for a time period T _{Practice of} And the maximum defrosting operation time length T _{Defrosting cream} Making a comparison if T _{Practice of} Is equal to T _{Defrosting cream} Determining the matching interval to which P belongs according to P, inquiring a preset adjusting table according to the matching interval, and searching the heating operation time length T corresponding to the matching interval from the preset adjusting table _{Operation of} The adjustment coefficient t. It is understood that the preset adjustment table is preset by the designer.

In one embodiment, taking the division into three proportioning intervals as an example, the preset adjustment table is as follows:

calculating an adjustment coefficient T and an initial heating operation time length T _{Operation of} The adjusted heating operation time length T is obtained by multiplying _{Regulating operation} 。

After the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, the defrosting mode is operated according to the initial defrosting operation parameters, and the defrosting time T of the air conditioning unit in the defrosting mode is recorded _{Practice of} Time period of defrosting _{Practice of} And the maximum defrosting operation time length T _{Defrosting cream} Making a comparison if T _{Practice of} Less than T _{Defrosting cream} Then returning to control the air conditioning unit to perform the initial heating operation time length T _{Operation of} And operating a heating mode.

If T _{In fact} Is equal to T _{Defrosting cream} Then root ofInquiring a preset adjusting table according to the proportioning interval, searching a frequency adjusting value a of the running frequency of the compressor in the defrosting mode corresponding to the proportioning interval from the preset adjusting table, calculating the sum of the frequency adjusting value a and the running frequency F of the initial compressor, and obtaining the running frequency F of the compressor in the adjusted defrosting mode _{Adjustment of} 。

The controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and controls the air conditioning unit to operate the compressor at the operating frequency F under the adjusted defrosting mode when the operating conditions of the defrosting mode are met _{Adjustment of} Operating a defrosting mode, and recording the defrosting time T of the air conditioning unit operating the defrosting mode _{Practice of} . Will defrost for a time T _{Practice of} And the maximum defrosting operation time length T _{Defrosting cream} Making a comparison if T _{Practice of} Less than T _{Defrosting cream} Then returning to control the air conditioning unit to perform the initial heating operation time length T _{Operation of the device} And operating a heating mode.

If T _{Practice of} Is equal to T _{Defrosting cream} Then, a preset adjusting table is inquired according to the ratio interval, a defrosting time length adjusting value delta T corresponding to the ratio interval is searched from the preset adjusting table, and the defrosting time length adjusting value delta T and the maximum defrosting operation time length T are calculated _{Defrosting cream} Obtaining the adjusted maximum defrosting operation time length, and updating the adjusted maximum defrosting operation time length to the maximum defrosting operation time length T _{Defrosting cream} 。

The controller controls the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and controls the air conditioning unit to operate the compressor at the operating frequency F under the adjusted defrosting mode when the operating conditions of the defrosting mode are met _{Adjustment of} Operating a defrosting mode, and recording the defrosting time T of the air conditioning unit operating the defrosting mode _{In fact} . Time for defrosting _{Practice of} And the maximum defrosting operation time length T _{Defrosting cream} Making a comparison if T _{Practice of} Is equal to T _{Defrosting cream} Then returning to the controller to calculate the defrosting time length adjustment value delta T and the maximum defrosting operation time length T _{Defrosting cream} And obtaining the adjusted maximum defrosting operation time.

If T _{Practice of} Less than T _{Defrosting cream} Then returning to control the air conditioning unit to make the controlHot running time period T _{Operation of} And operating a heating mode.

In the defrosting control method of the multi-connected air conditioner in the embodiment, when it is determined that the system ratio of the multi-connected air conditioning system is low, whether the condition of incomplete defrosting exists is judged, if yes, the heating operation time of the heating mode is shortened firstly to achieve the effect of reducing the frosting amount, if the defrosting mode is operated again, the condition of incomplete defrosting still exists, the operation frequency of the compressor under the defrosting mode is increased to enhance the defrosting effect, and if the defrosting mode is operated again, the maximum defrosting time of the defrosting mode is increased finally, so that the total defrosting time is increased, the effect of complete defrosting is ensured, the phenomena of incomplete defrosting and incomplete defrosting are avoided, the condition of incomplete defrosting of the multi-connected air conditioning system is effectively improved, and the user experience is improved.

It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the application also provides a multi-connected air conditioner defrosting control device for realizing the multi-connected air conditioner defrosting control method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so specific limitations in one or more embodiments of the multiple air conditioner defrosting control device provided below can be referred to the limitations on the multiple air conditioner defrosting control method in the above, and details are not repeated herein.

In one embodiment, as shown in fig. 7, there is provided a multiple air conditioner defrosting control device 700, including: an initial control module 701, a defrosting condition judgment module 702 and a defrosting control module 703, wherein:

the initial control module 701 is configured to control the air conditioning unit to operate the heating mode according to the initial heating operation parameter, and then operate the defrosting mode according to the initial defrosting operation parameter.

The defrosting condition determining module 702 is configured to, if the system ratio of the total capacity of the indoor units to the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold, and the defrosting operation duration of the current defrosting mode is equal to the maximum defrosting operation duration, adjust the heating operation parameters of the heating mode according to the system ratio to reduce frosting.

And the defrosting control module 703 is configured to control the air conditioning unit to operate the heating mode according to the adjusted heating operation parameter, and then operate the defrosting mode according to the initial defrosting operation parameter.

According to the defrosting control device for the multi-connected air conditioner, if the system ratio of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than the preset ratio threshold value, and the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, the heating capacity of the indoor units in the multi-connected air conditioner is smaller than the refrigerating capacity of the outdoor units, when the preset maximum defrosting time is reached, the frost layer of the outdoor units is still not cleaned, and at the moment, the multi-connected air conditioner has the phenomenon of incomplete defrosting. The controller of the multi-connected air conditioning system adjusts heating operation parameters of an operation heating mode according to a system ratio, the adjusted heating operation parameters are made to accord with the total capacity distribution condition of an indoor unit and an outdoor unit of the multi-connected air conditioning system at present, the air conditioning unit is controlled to operate the heating mode according to the adjusted heating operation parameters, and a defrosting mode is operated according to the initial defrosting operation parameters, so that the frosting condition of the outdoor unit in the next operation can be reduced, the number of frost layers in the next defrosting process is reduced, defrosting is more thorough, the condition that the multi-connected air conditioning system is not thorough in defrosting is effectively improved, and the use experience of a user is improved.

In one embodiment, the defrosting control device of the multi-connected air conditioner further comprises: and the parameter adjusting module is used for adjusting the defrosting operation parameters of the running defrosting mode step by step according to the system proportion to improve the defrosting performance if the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, and controlling the air conditioning unit to run the heating mode according to the adjusted heating operation parameters and then run the defrosting mode according to the adjusted defrosting operation parameters until the defrosting operation time of the running defrosting mode is less than the maximum defrosting time.

In one embodiment, the parameter adjustment module is further configured to: increasing the running frequency of the compressor in a defrosting running mode according to the system proportion; controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the adjusted defrosting operation parameters; the adjusted defrosting operation parameter comprises an adjusted compressor operation frequency; and if the defrosting operation time of the current defrosting mode is shorter than the maximum defrosting operation time, returning to the step of controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and then operating the defrosting mode according to the initial defrosting operation parameters.

In one embodiment, the parameter adjustment module is further configured to: if the defrosting operation time of the current defrosting mode is equal to the maximum defrosting time, increasing the maximum defrosting time according to the system proportion; controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, and then operating the defrosting mode according to the adjusted defrosting operation parameters; the adjusted defrosting operation parameters comprise the adjusted maximum defrosting time and the adjusted compressor operation frequency; and if the defrosting operation time length of the current defrosting mode is less than the adjusted maximum defrosting operation time length, returning to the step of controlling the air conditioning unit to operate the heating mode by the initial heating operation parameters and then operating the defrosting mode by the initial defrosting operation parameters.

In one embodiment, the parameter adjustment module is further configured to: and if the operation time of the current defrosting mode is equal to the adjusted maximum defrosting time, returning to the step of increasing the maximum defrosting time according to the system proportion until the defrosting operation time is less than the maximum defrosting time.

In one embodiment, the parameter adjustment module is further configured to: and reducing the heating operation time of the operation heating mode according to the system proportion.

In one embodiment, the parameter adjustment module is further configured to: determining a frequency adjustment value of the compressor in a defrosting operation mode according to the system ratio; obtaining the adjusted running frequency of the compressor based on the frequency adjustment value and the initial running frequency of the compressor in the defrosting running mode; wherein, the larger the system proportion is, the smaller the frequency adjustment value is.

In one embodiment, the parameter adjustment module is further configured to: determining a defrosting time length adjusting value according to the system ratio; obtaining the adjusted maximum defrosting time length based on the defrosting time length adjusting value and the maximum defrosting time length; wherein, the larger the system proportion is, the smaller the defrosting time length adjustment value is.

In one embodiment, the parameter adjustment module is further configured to: determining a defrosting time length adjusting value according to the system ratio; obtaining the adjusted maximum defrosting time length based on the defrosting time length adjusting value, the maximum defrosting time length and the adjusting times of the maximum defrosting time length; wherein, the larger the system proportion is, the smaller the defrosting time length adjustment value is.

All or part of each module in the multi-connected air conditioner defrosting control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, which may be a controller, the internal structure of which may be as shown in fig. 8. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The database of the computer equipment is used for storing data such as initial heating operation parameters, initial defrosting operation parameters, preset proportioning threshold values and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize a defrosting control method of the multi-connected air conditioner.

Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided and comprises a storage and a processor, wherein the storage stores a computer program, and the processor executes the computer program to implement the specific implementation steps of the multi-connected air-conditioning defrosting control method.

In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement the specific implementation steps of the multi-connected air conditioner defrosting control method.

In one embodiment, a computer program product is provided, which includes a computer program, and when the computer program is executed by a processor, the computer program implements the specific implementation steps of the multi-connected air conditioner defrosting control method.

It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), magnetic Random Access Memory (MRAM), ferroelectric Random Access Memory (FRAM), phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A defrosting control method for a multi-connected air conditioner is characterized by comprising the following steps:

if the system ratio of the total capacity of the indoor units and the total capacity of the outdoor units of the multi-connected air conditioner is lower than a preset ratio threshold value, and the defrosting operation time length of the current defrosting mode is equal to the maximum defrosting operation time length, adjusting the heating operation parameters of the heating mode according to the system ratio to reduce frosting;

2. The method of claim 1, wherein after the step of operating the defrosting mode at the initial defrosting operation parameter after the step of controlling the air conditioning unit to operate the heating mode at the adjusted heating operation parameter, the method further comprises:

3. The method according to claim 2, wherein the step-by-step adjusting defrosting operation parameters for operating the defrosting mode according to the system ratio to improve defrosting performance, and after controlling the air conditioning unit to operate the heating mode according to the adjusted heating operation parameters, operating the defrosting mode according to the adjusted defrosting operation parameters until a defrosting operation time for operating the defrosting mode is shorter than the maximum defrosting time, comprises:

increasing the running frequency of the compressor in the defrosting running mode according to the system proportion;

and if the defrosting operation time of the current defrosting mode is shorter than the maximum defrosting operation time, returning to the step of controlling the air conditioning unit to operate the heating mode according to the initial heating operation parameters and then operating the defrosting mode according to the initial defrosting operation parameters.

4. The method of claim 3, further comprising:

5. The method of claim 4, further comprising:

6. The method of claim 1, wherein the heating operation parameter is a heating operation duration;

7. The method of claim 6, wherein reducing a heating operation duration for operating the heating mode according to the system charge ratio comprises:

8. The method of claim 3, wherein increasing the operating frequency of the compressor in the defrosting operation mode according to the system ratio comprises:

determining a frequency adjustment value of a compressor in the defrosting operation mode according to the system ratio;

9. The method of claim 4, wherein said increasing said maximum length of defrost time according to said system charge comprises:

10. The method of claim 4, wherein said increasing said maximum length of defrost time according to said system charge comprises:

11. A multi-connected air conditioner defrosting control device is characterized by comprising:

12. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 10 when executing the computer program.

13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 10.

14. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 10 when executed by a processor.