阅读说明：本技术 空调系统的控制方法以及空调系统 (Control method of air conditioning system and air conditioning system ) 是由 吴楠 徐璐 金旭艳 于 2020-04-30 设计创作，主要内容包括：本发明提供一种空调系统的控制方法以及空调系统,有助于确保系统的安全性和清洁运转的有效性。在本发明的空调系统的控制方法中,空调系统包括室外机和与该室外机形成制冷剂回路的室内机,空调系统具有对室内机的内部进行清洁的包括多个阶段的清洁模式,空调系统的控制方法包括：异常信息获取步骤,获取在空调系统执行清洁模式的过程中的异常信息；异常信息判断步骤,根据在异常信息获取步骤中获取的异常信息对异常类型进行判断；阶段判断步骤,对清洁模式所处的阶段进行判断；以及后续处理步骤,根据在异常信息判断步骤中确定的异常类型和在阶段判断步骤中确定的清洁模式所处的阶段,来确定是否停止或暂停清洁模式。(The invention provides a control method of an air conditioning system and the air conditioning system, which is helpful for ensuring the safety of the system and the effectiveness of cleaning operation. In a control method of an air conditioning system according to the present invention, the air conditioning system includes an outdoor unit and an indoor unit forming a refrigerant circuit with the outdoor unit, the air conditioning system has a cleaning mode including a plurality of stages for cleaning an inside of the indoor unit, and the control method of the air conditioning system includes: an abnormal information acquisition step of acquiring abnormal information in a process of executing a cleaning mode by an air conditioning system; an abnormality information determination step of determining the type of abnormality based on the abnormality information acquired in the abnormality information acquisition step; a stage judgment step of judging the stage of the cleaning mode; and a subsequent processing step of determining whether to stop or suspend the cleaning mode according to the abnormality type determined in the abnormality information determination step and the stage in which the cleaning mode determined in the stage determination step is located.)

1. A control method of an air conditioning system, the air conditioning system (1) including an outdoor unit (100) and an indoor unit (200) forming a refrigerant circuit with the outdoor unit, the air conditioning system having a cleaning mode including a plurality of stages for cleaning an inside of the indoor unit, the method comprising:

an abnormality information acquisition step (ST1) of acquiring abnormality information during execution of the cleaning mode by the air conditioning system;

an abnormality information determination step (ST2) of determining an abnormality type based on the abnormality information acquired in the abnormality information acquisition step;

a stage judgment step (ST3) of judging the stage at which the cleaning mode is located; and

a subsequent processing step (ST4) of determining whether to stop or suspend the cleaning mode in accordance with the abnormality type determined in the abnormality information determination step and the stage at which the cleaning mode determined in the stage determination step is located.

2. The control method of an air conditioning system according to claim 1,

the cleaning mode may include a first cleaning mode in which,

the first cleaning mode sequentially performs a frosting stage, a defrosting stage, and a drying stage.

3. The control method of an air conditioning system according to claim 2,

in the subsequent processing step, the air conditioning system is caused to continue or suspend the cleaning mode if it is determined that the abnormality type does not affect the continuity of the cleaning mode, and on the other hand, the air conditioning system is caused to stop executing the cleaning mode if it is determined that the abnormality type affects the continuity of the cleaning mode.

4. The control method of an air conditioning system according to claim 3,

in the subsequent processing step, it is determined that the abnormality type does not affect the continuity of the cleaning mode when the removal required time period T1 of the abnormality type is less than a preset time period Tpd, and on the other hand, it is determined that the abnormality type affects the continuity of the cleaning mode when the removal required time period T1 is equal to or longer than the preset time period Tpd.

5. The control method of an air conditioning system according to claim 1,

the cleaning mode includes a second cleaning mode in which,

the second cleaning mode sequentially executes a condensation stage, a stop stage, an air supply stage, and a heating stage.

6. The control method of an air conditioning system according to claim 5,

in the subsequent processing step, when the stage determined in the stage determination step is the dew condensation stage, the air conditioning system is caused to continue or suspend execution of the cleaning mode when it is determined that the abnormality type does not affect the continuity of the cleaning mode, and on the other hand, the air conditioning system is caused to stop execution of the cleaning mode when it is determined that the abnormality type affects the continuity of the cleaning mode.

7. The control method of an air conditioning system according to claim 6,

in the subsequent processing step, it is determined that the abnormality type does not affect the continuity of the cleaning mode when the removal required time period T1 of the abnormality type is less than a preset time period Tpd, and on the other hand, it is determined that the abnormality type affects the continuity of the cleaning mode when the removal required time period T1 is equal to or longer than the preset time period Tpd.

8. The control method of an air conditioning system according to claim 6,

and under the condition that the air conditioning system is suspended to execute the cleaning mode in the subsequent processing step, after exception is eliminated, judging whether to restart or continue the second cleaning mode according to the operation time length of the dewing stage or the humidity in the indoor unit.

9. The control method of an air conditioning system according to claim 1,

the air conditioning system comprises a plurality of indoor units,

under the condition that more than two indoor units execute the cleaning mode simultaneously, if part of the indoor units are abnormal, the rest of the indoor units are not abnormal or the abnormal type does not influence the continuity of the cleaning mode although the abnormal type exists, the rest of the indoor units are continuously kept in the cleaning mode.

10. An air conditioning system (1) comprising: an outdoor unit (100) and an indoor unit (200) forming a refrigerant circuit with the outdoor unit; and a control unit (300) for controlling the operation of the air conditioning system,

the control unit controls the operation of the air conditioning system according to the control method of the air conditioning system according to any one of claims 1 to 9.

Technical Field

The invention relates to a control method of an air conditioning system and the air conditioning system.

Background

After the indoor unit of the air conditioning system is used for a long time, dust adheres to the inside of the machine, particularly a heat exchanger, so that sufficient nutrients are provided for bacterial breeding, and after the indoor unit is subjected to refrigerating operation or dehumidifying operation, the humidity inside the machine is high, so that a superior environment is provided for bacterial breeding. In an indoor unit of an air conditioning system, blown air is harmful to the health of a user due to breeding and mildew of bacteria in the machine, and when the bacteria grow seriously in the machine, pores of an air outlet grating and the like can be blocked, so that the air outlet amount is reduced, and the use of the indoor unit is influenced.

In view of the above circumstances, there is a technology for cleaning and sterilizing the inside of an air conditioning system by adjusting the operating state of the air conditioning system so that the indoor unit sequentially passes through four stages of condensation (removing floating dust on the surface of a heat exchanger by condensed water) → frosting (peeling off dust, foreign substances, and the like from the surface of the heat exchanger) → heating (defrosting, secondary cleaning, high-temperature sterilization while removing the peeled dust, foreign substances, and the like from the heat exchanger) → ventilation (drying the heat exchanger while cooling the temperature) (see patent document 1).

Documents of the prior art

Patent document 1: chinese patent No. CN109489189A gazette

However, in the case of the above-described technology, the operating state of the air conditioning system needs to be switched many times, and a limit operation in which the indoor unit immediately performs heating after frosting occurs, and the air conditioning system is likely to malfunction.

In a conventional air conditioning system, if an abnormality occurs during operation such as cooling, heating, blowing, etc., it is generally determined whether the system is stopped or not based on the type of the abnormality and the operation is resumed after the abnormality is resolved, but if an abnormality occurs in a functional mode requiring continuous operation in multiple steps, such as cleaning and mildew prevention, the continuity is broken and the function cannot be realized.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a control method of an air conditioning system and an air conditioning system that contribute to ensuring safety of the system and effectiveness of a cleaning operation.

In order to achieve the above object, the present invention provides a method for controlling an air conditioning system including an outdoor unit and an indoor unit forming a refrigerant circuit with the outdoor unit, the air conditioning system having a cleaning mode including a plurality of stages for cleaning an inside of the indoor unit, the method including: an abnormal information acquiring step of acquiring abnormal information in a process in which the air conditioning system executes the cleaning mode; an abnormality information determination step of determining an abnormality type based on the abnormality information acquired in the abnormality information acquisition step; a stage judgment step of judging the stage where the cleaning mode is located; and a subsequent processing step of determining whether to stop or suspend the cleaning mode, based on the abnormality type determined in the abnormality information determination step and the stage at which the cleaning mode determined in the stage determination step is located.

Here, "stop" means that the cleaning mode is not continued after the interruption, and "pause" means that the cleaning mode is continued after the interruption.

The control method of the air conditioning system according to the present invention includes: an abnormal information acquisition step of acquiring abnormal information in a process of executing a cleaning mode by an air conditioning system; an abnormality information determination step of determining the type of abnormality based on the abnormality information acquired in the abnormality information acquisition step; a stage judgment step of judging the stage of the cleaning mode; and a subsequent processing step of determining whether to stop or suspend the cleaning mode according to the abnormality type determined in the abnormality information determination step and the stage in which the cleaning mode determined in the stage determination step is located. Therefore, it is easy to prevent the air conditioning system from being switched many times without switching such as stopping operation and the like to cause failure, to ensure the safety of the system, and to prevent the continuity of the cleaning mode from being damaged due to the switching of the air conditioning system without switching such as stopping operation and the like.

Further, in the control method of an air conditioning system of the present invention, it is preferable that the cleaning mode includes a first cleaning mode that sequentially performs a frosting stage, a defrosting stage, and a drying stage.

According to the control method of the air conditioning system, the cleaning operation can be realized by using the simple method of the first cleaning mode, particularly, the dust and the impurities attached to the heat exchanger of the indoor unit are wrapped by frost in the frosting stage, the dust and the impurities flow into the drain pan of the indoor unit along with water in the frosting stage and are discharged to the outside of the indoor unit, and the inside of the indoor unit is dried in the drying stage, so that the heat exchanger of the indoor unit is cleaned, and the inside of the indoor unit is kept dry.

Further, in the control method of an air conditioning system of the present invention, it is preferable that in the subsequent processing step, the air conditioning system is caused to continue or suspend execution of the cleaning mode in a case where it is determined that the abnormality type does not affect continuity of the cleaning mode, and on the other hand, the air conditioning system is caused to stop execution of the cleaning mode in a case where it is determined that the abnormality type affects continuity of the cleaning mode.

Here, as the abnormality type which does not affect the continuity of the cleaning mode, there are an alarm, a display failure code, and the like, for example, and as the abnormality type which affects the continuity of the cleaning mode, there are a hot-off (hot-off), a shutdown, and the like, for example.

According to the control method of the air conditioning system, whether the air conditioning system is stopped or the cleaning mode is suspended is determined according to whether the abnormal type affects the continuity of the cleaning mode, so that the air conditioning system is prevented from being switched for a plurality of times without switching such as stopping operation and the like to cause faults, the safety of the system is ensured, the continuity of the cleaning mode is prevented from being damaged due to the fact that the air conditioning system is switched without switching such as stopping operation and the like, the air conditioning system can be stopped in time when the air conditioning system needs to be stopped, the system is prevented from doing useless work, and energy conservation is achieved.

Further, in the control method of an air conditioning system of the present invention, it is preferable that in the subsequent processing step, in a case where the period of time required for exclusion T1 of the abnormality type is less than a preset period of time Tpd, it is determined that the abnormality type does not affect the continuity of the cleaning mode, and on the other hand, in a case where the period of time required for exclusion T1 is equal to or more than the preset period of time Tpd, it is determined that the abnormality type affects the continuity of the cleaning mode.

According to the control method of the air conditioning system of the present invention, even if the type of abnormality is similar to a hot-off and a shutdown, as long as it excludes that the required period of time T1 is less than the preset period of time Tpd, it is regarded as not affecting the continuity of the cleaning mode and the air conditioning system continues to perform the cleaning operation, and therefore, the continuity of the cleaning operation can be further ensured.

Further, in the control method of an air conditioning system according to the present invention, it is preferable that the cleaning mode includes a second cleaning mode including sequentially performing a condensation phase, a stop phase, an air blowing phase, and a heating phase.

According to the control method of the air conditioning system, the temperature and the humidity of the internal environment of the indoor unit can be adjusted by utilizing the second cleaning mode, and the living and breeding environments of mildew and bacteria are damaged, so that the interior of the indoor unit is thoroughly subjected to mildew-proof sterilization treatment.

In the control method of an air conditioning system according to the present invention, it is preferable that, when the stage determined in the stage determination step is the dew condensation stage, the subsequent processing step continues or suspends the air conditioning system in the cleaning mode when it is determined that the abnormality type does not affect the continuity of the cleaning mode, and on the other hand, stops the air conditioning system from executing the cleaning mode when it is determined that the abnormality type affects the continuity of the cleaning mode.

According to the control method of the air conditioning system of the present invention, when the stage determined in the stage determining step is the condensation stage, it is easier to avoid the air conditioning system from being switched many times without switching such as shutdown, and the like, and causing a failure, and to ensure the safety of the system, and it is easier to prevent the continuity of the cleaning mode from being broken due to the switching of the air conditioning system without switching such as shutdown, and the like, and it is possible to stop the air conditioning system in time when the air conditioning system needs to be stopped, to ensure the effectiveness of the cleaning mode, to prevent the system from doing useless work, and to achieve energy saving.

Further, in the control method of an air conditioning system of the present invention, it is preferable that in the subsequent processing step, in a case where the period of time required for exclusion T1 of the abnormality type is less than a preset period of time Tpd, it is determined that the abnormality type does not affect the continuity of the cleaning mode, and on the other hand, in a case where the period of time required for exclusion T1 is equal to or more than the preset period of time Tpd, it is determined that the abnormality type affects the continuity of the cleaning mode.

According to the control method of the air conditioning system of the present invention, as described above, even if the abnormality type is similar to the hot-off and the shutdown, as long as it excludes that the required period of time T1 is less than the preset period of time Tpd, it is regarded as not affecting the continuity of the cleaning mode to cause the air conditioning system to continue to perform the cleaning operation, and therefore, the continuity of the cleaning operation can be further ensured.

In the control method of an air conditioning system according to the present invention, it is preferable that, when the air conditioning system is suspended from executing the cleaning mode in the subsequent processing step, after the abnormality is eliminated, whether or not the second cleaning mode is restarted or continued is determined based on the operation time period of the dew condensation stage or the humidity inside the indoor unit.

Here, the "restart" means that the second cleaning mode is resumed, for example, a fixed period of time of the dew condensation stage is 20 minutes, and since the abnormality is suspended for 2 minutes, after the abnormality is eliminated, dew condensation is resumed for 20 minutes to start the second cleaning mode from the beginning, unlike the continued operation in which the second cleaning mode is continued for a remaining period of time (i.e., 18 minutes) for dew condensation.

According to the control method of the air conditioning system, whether the second cleaning mode is restarted or not is judged according to the operation time length of the condensation stage or the humidity inside the indoor unit, so that the interior of the indoor unit can be thoroughly subjected to mildew-proof sterilization treatment.

In the method of controlling an air conditioning system according to the present invention, it is preferable that the air conditioning system includes a plurality of indoor units, and when two or more indoor units simultaneously execute the cleaning mode, if some of the indoor units are abnormal and the remaining indoor units are not abnormal or it is determined that the type of abnormality does not affect continuity of the cleaning mode despite the abnormality, the remaining indoor units continue to maintain the cleaning mode.

According to the control method of the air conditioning system, complete mildew-proof sterilization treatment can be carried out on the indoor machine which normally operates.

Further, in order to achieve the above object, the present invention provides an air conditioning system comprising: an outdoor unit and an indoor unit forming a refrigerant circuit with the outdoor unit; and a control unit that controls an operation of the air conditioning system, wherein the control unit controls the operation of the air conditioning system according to the control method of the air conditioning system.

(effect of the invention)

According to the present invention, a control method of an air conditioning system includes: an abnormal information acquisition step of acquiring abnormal information in a process of executing a cleaning mode by an air conditioning system; an abnormality information determination step of determining the type of abnormality based on the abnormality information acquired in the abnormality information acquisition step; a stage judgment step of judging the stage of the cleaning mode; and a subsequent processing step of determining whether to stop or suspend the cleaning mode according to the abnormality type determined in the abnormality information determination step and the stage in which the cleaning mode determined in the stage determination step is located. Therefore, it is easy to prevent the air conditioning system from being switched many times without switching such as stopping operation and the like to cause failure, to ensure the safety of the system, and to prevent the continuity of the cleaning mode from being damaged due to the switching of the air conditioning system without switching such as stopping operation and the like.

Drawings

Fig. 1 is a schematic diagram showing a refrigerant circuit of an air conditioning system according to an embodiment of the present invention.

Fig. 2 is a flowchart showing an abnormality processing of the air conditioning system according to the embodiment of the present invention.

(symbol description)

1 air conditioning system

100 outdoor machine

101 compressor

102 four-way valve

103 outdoor heat exchanger

104 outdoor fan

105 outdoor regulating valve

106 storage tank

200 indoor machine

201 indoor heat exchanger

202 indoor fan

203 indoor regulating valve

300 control unit

401. 402 communication pipe

Detailed Description

An air conditioning system according to an embodiment of the present invention will be described with reference to fig. 1 and 2, where fig. 1 is a schematic diagram showing a refrigerant circuit of the air conditioning system according to the embodiment of the present invention, and fig. 2 is a flowchart showing an abnormality processing of the air conditioning system according to the embodiment of the present invention.

(Structure of air-conditioning System)

As shown in fig. 1, an air conditioning system 1 of the present embodiment includes: an outdoor unit 100 and an indoor unit 200 forming a refrigerant circuit with the outdoor unit 100; and a control unit 300, the control unit 300 controlling the operation of the air conditioning system 1.

Here, the outdoor unit 100 is connected to the indoor units 200 by communication pipes 401 and 402, thereby forming a refrigerant circuit. The outdoor unit 100 is provided with a compressor 101, a four-way valve 102, an outdoor heat exchanger 103, an outdoor fan 104, an outdoor control valve 105, and an accumulator 106, wherein the compressor 101 pressurizes and discharges a refrigerant, the four-way valve 102 controls the flow direction of the refrigerant in a refrigerant circuit, the outdoor heat exchanger 103 functions as a condenser or an evaporator of the refrigerant, the outdoor fan 104 sends air to the outdoor heat exchanger 103, the outdoor control valve 105 controls the pressure, flow rate, and the like of the refrigerant flowing therethrough, and the accumulator 106 absorbs a liquid component contained in the refrigerant returned to the compressor 101. The indoor unit 200 is provided with an indoor heat exchanger 201, an indoor fan 202, and an indoor control valve 203, wherein the indoor heat exchanger 201 can function as a condenser or an evaporator of the refrigerant, the indoor fan 202 sends air to the indoor heat exchanger 201, and the indoor control valve 203 controls the pressure, the flow rate, and the like of the refrigerant flowing therethrough. The control unit 300 may be provided in the indoor unit 200 or may be provided independently of the indoor unit 200.

(operation of air-conditioning System)

The operation modes of the air conditioning system 1 of the present embodiment include a normal mode including a cooling operation and a heating operation, and a cleaning mode including a normal cleaning operation (i.e., a first cleaning mode) and a deep cleaning operation (i.e., a second cleaning mode) for cleaning the inside of the indoor unit 200.

< Cooling operation >

During the cooling operation, four-way valve 102 is switched to the state shown by the solid line in fig. 1.

In the above state, the refrigerant discharged after being pressurized by the compressor 101 in the outdoor unit 100 flows into the outdoor heat exchanger 103 through the four-way valve 102, is cooled by heat exchange with the outdoor air sent from the outdoor fan 104 in the outdoor heat exchanger 103 (that is, the outdoor heat exchanger 103 functions as a condenser), then flows through the outdoor control valve 105, and flows out of the outdoor unit 100.

The refrigerant flowing out of the outdoor unit 100 flows into the indoor unit 200 through the communication pipe 401, flows through the indoor control valve 203, flows into the indoor heat exchanger 201, exchanges heat with the indoor air sent by the indoor fan 202 in the indoor heat exchanger 201 to cool the indoor air (that is, the indoor heat exchanger 201 functions as an evaporator), and then flows out of the indoor unit 200.

The refrigerant flowing out of the indoor unit 200 flows into the accumulator 106 via the four-way valve 102 and then returns to the compressor 101.

< heating operation >

During the cooling operation, four-way valve 102 is switched to the state shown by the broken line in fig. 1.

In the above state, the refrigerant discharged after being pressurized by the compressor 101 in the outdoor unit 100 flows through the four-way valve 102, and then flows out of the outdoor unit 100.

The refrigerant flowing out of the outdoor unit 100 flows into the indoor unit 200 through the communication pipe 402, flows into the indoor heat exchanger 201, exchanges heat with the indoor air sent by the indoor fan 202 in the indoor heat exchanger 201 to heat the indoor air (that is, the indoor heat exchanger 201 functions as a condenser), flows through the indoor control valve 203, and flows out of the indoor unit 200.

The refrigerant flowing out of the indoor unit 200 flows into the outdoor unit 100 through the communication pipe 401, flows through the outdoor control valve 105, flows into the outdoor heat exchanger 103, is heated by heat exchange with the outdoor air sent from the outdoor fan 104 in the outdoor heat exchanger 103 (that is, the outdoor heat exchanger 103 functions as an evaporator), flows into the accumulator 106 through the four-way valve 102, and finally returns to the compressor 101.

< ordinary cleaning operation >

The normal cleaning operation (i.e., the first cleaning mode) includes a frosting stage in which the air conditioning system 1 performs a cooling operation in which the indoor heat exchanger 201 serves as an evaporator, a defrosting stage in which the air conditioning system 1 performs a heating operation in which the indoor heat exchanger 201 serves as a condenser, and may perform an air blowing operation in which the indoor fan 202 blows air to the indoor heat exchanger 201, and a drying stage in which the air conditioning system 1 performs an air blowing operation in which the indoor fan 202 blows air to the indoor heat exchanger 201, and may perform a heating operation in which the indoor heat exchanger 201 serves as a condenser, thereby cleaning the indoor heat exchanger 201 and drying the inside of the indoor unit.

< operation of deep cleaning >

The deep cleaning operation (i.e., the second cleaning mode) includes a condensation phase in which the air conditioning system 1 performs a cooling operation in which the indoor heat exchanger 201 functions as an evaporator, a stop phase in which the air conditioning system 1 performs an air blowing operation in which the indoor fan 202 blows air to the indoor heat exchanger 201, and a heating phase in which the air conditioning system 1 performs a heating operation in which the indoor heat exchanger 201 functions as a condenser, which are sequentially performed. In the condensation stage, the cooling operation is performed to humidify the secondary side of the indoor heat exchanger 201, in the stop stage, the compressor 101 is stopped to humidify the primary side of the indoor heat exchanger 201, while in the air blowing stage, the air blowing operation is performed to achieve the first dehumidification, and in the heating stage, the heating operation is performed to achieve the second dehumidification, whereby the relative humidity inside the indoor unit is reduced to a certain degree within a set time, the inside of the indoor unit is ensured to be dry, and the living and breeding environments of mold and bacteria are suppressed.

(Main feature of air-conditioning system)

The air conditioning system 1 according to the present embodiment performs an abnormality process as shown in fig. 2, and includes: an abnormality information acquisition step ST1, the control unit 300 acquires abnormality information in the course of the air conditioning system 1 performing the cleaning mode; an abnormality information determination step ST2, the control unit 300 determines the type of abnormality from the abnormality information acquired in the abnormality information acquisition step ST 1; a stage judgment step ST3, in which the control unit 300 judges the stage of the cleaning mode; and a subsequent process step ST4, the control unit 300 determines whether to stop or suspend the cleaning mode according to the type of abnormality determined in the abnormality information determination step ST2 and the stage at which the cleaning mode determined in the stage determination step ST3 is located.

Further, in subsequent processing step ST4, in the case where it is determined that the type of abnormality does not affect the continuity of the cleaning mode, control unit 300 causes air conditioning system 1 to continue to execute the cleaning mode, and on the other hand, in the case where it is determined that the type of abnormality affects the continuity of the cleaning mode, control unit 300 causes air conditioning system 1 to stop or suspend execution of the cleaning mode.

Here, as the abnormality type which does not affect the continuity of the cleaning mode, there are an alarm, a display failure code, and the like, for example, and as the abnormality type which affects the continuity of the cleaning mode, there are a hot-off (hot-off), a shutdown, and the like, for example.

For example, as shown in table 1 below, when the air conditioning system 1 executes the first cleaning mode, if the control unit 300 determines in the abnormality information determination step ST2 that the abnormality type is a hot shutdown and determines in the stage determination step ST3 that the stage in which the cleaning mode is located is a frosting stage, the cleaning mode is suspended (at this time, the air conditioning system 1 executes the cooling operation, the effect of the suspended cleaning mode on the cleaning mode is small, and the cooling operation may be continued or the cooling operation may be restarted after the trouble is cleared); in contrast, as shown in table 1 below, in the case where the air conditioning system 1 executes the first cleaning mode, if the control unit 300 determines in the abnormality information determination step ST2 that the abnormality type is the hot off, and determines in the stage determination step ST3 that the stage in which the cleaning mode is located is the defrosting stage or the drying stage, the cleaning mode is stopped.

On the other hand, as shown in table 2 below, when the air conditioning system 1 executes the second cleaning mode, if the control unit 300 determines in the abnormality information determination step ST2 that the abnormality type is the hot-off, and determines in the stage determination step ST3 that the stage of the cleaning mode is either the dew condensation stage or the stop stage, the cleaning mode is suspended (in this case, the air conditioning system 1 humidifies the inside of the indoor unit through the dew condensation stage or the stop stage, the effect of the suspended cleaning mode on the cleaning mode is small, and after the trouble is cleared, when it is ensured that the relative humidity inside the indoor unit satisfies the set condition, the cleaning mode can be continuously executed); on the other hand, as shown in table 2 below, when the air conditioning system 1 executes the second cleaning mode, if the control unit 300 determines in the abnormality information determination step ST2 that the type of abnormality is heat-off and determines in the stage determination step ST3 that the stage of the cleaning mode is either the air-blowing stage or the heating stage, the cleaning mode is stopped (the air-blowing stage or the heating stage dehumidifies the interior of the indoor unit by the temperature and humidity inside the indoor unit, and the relative humidity inside the indoor unit needs to be reduced to a certain degree within a set time, so that the cleaning effect is affected by the occurrence of an abnormality in both the air-blowing stage and the heating stage, that is, if an abnormality affecting the continuity of the mode occurs in the air-blowing stage or the heating stage, for example, if the indoor unit or the air conditioning system is suspended for a certain period of time, the relative humidity inside the indoor unit changes after the abnormality is removed, the "requirement to reduce the relative humidity inside the indoor unit to a certain degree within a set time" cannot be satisfied, and thus the second cleaning mode cannot be continuously executed after the abnormality is eliminated).

Table 1 (corresponding to the first cleaning mode)

TABLE 2 (corresponding to the second cleaning mode)

In addition, when the air conditioning system 1 executes the first cleaning mode, if the air conditioning system 1 is suspended from executing the cleaning mode in the subsequent processing step ST4 due to an abnormality occurring in the frost formation stage, the control unit 300 determines whether to restart the first cleaning mode according to the operation time period of the frost formation stage or the humidity inside the indoor unit after the abnormality is eliminated. On the other hand, in the case where the air conditioning system 1 executes the second cleaning mode, if the air conditioning system 1 is suspended from executing the cleaning mode in the subsequent processing step ST4 due to the occurrence of an abnormality in the dew condensation stage, the control unit 300 determines whether to restart or continue the second cleaning mode based on the operation time period in the dew condensation stage or the humidity inside the indoor unit after the abnormality is eliminated. For example, the fixed time period of the frosting or dewing stage is 20 minutes, and the abnormal state is suspended for 2 minutes, and after the abnormal state is eliminated, the frosting or dewing is performed again for 20 minutes, or the frosting or dewing is performed for the remaining time period (i.e., 18 minutes).

Further, the abnormality type excluding the required period T1 being less than the preset period Tpd may also be regarded as the abnormality type not affecting the continuity of the cleaning mode. That is, in the subsequent processing step ST4, in the case where the exclusion required time period T1 of the abnormality type is smaller than the preset time period Tpd, the control unit 300 may determine that the abnormality type does not affect the continuity of the cleaning mode, and on the other hand, in the case where the exclusion required time period T1 is equal to or longer than the preset time period Tpd, the control unit 300 may determine that the abnormality type affects the continuity of the cleaning mode. For example, in the case where the air conditioning system 1 executes the second cleaning mode, if the indoor heat exchanger 201 continues to be lower than-2 ℃ for 2 minutes due to the occurrence of an abnormality in the dew condensation stage, the control unit 300 determines that the type of the abnormality does not affect the continuity of the cleaning mode, and continues the cleaning operation after the temperature rises; in contrast, when the air conditioning system 1 executes the second cleaning mode, if the indoor heat exchanger 201 continues to operate for 10 minutes less than-5 ℃ due to an abnormality occurring in the dew condensation stage, the control unit 300 determines that the type of abnormality affects the continuity of the cleaning mode and stops the cleaning operation (here, to prevent the indoor heat exchanger from freezing).

(main technical effects of the present embodiment)

According to the air conditioning system 1 of the present embodiment, the abnormality processing is performed, and the abnormality processing includes: an abnormality information acquisition step ST1, the control unit 300 acquires abnormality information in the course of the air conditioning system 1 performing the cleaning mode; an abnormality information determination step ST2, the control unit 300 determines the type of abnormality from the abnormality information acquired in the abnormality information acquisition step ST 1; a stage judgment step ST3, in which the control unit 300 judges the stage of the cleaning mode; and a subsequent process step ST4, the control unit 300 determines whether to stop or suspend the cleaning mode according to the type of abnormality determined in the abnormality information determination step ST2 and the stage at which the cleaning mode determined in the stage determination step ST3 is located. Therefore, it is easy to prevent the air conditioning system 1 from being switched many times without switching such as stopping operation and the like to cause a failure, to ensure the safety of the system, and to prevent the continuity of the cleaning mode from being broken due to switching of the air conditioning system 1 without switching such as stopping operation and the like, and to stop the air conditioning system 1 in time when it is necessary to stop the system, to ensure the effectiveness of the cleaning mode, to prevent the system from doing useless work, and to save energy.

The present invention is described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.

For example, in the above embodiment, the air conditioning system 1 includes only one indoor unit 200, but is not limited thereto, and the air conditioning system may include a plurality of indoor units. In this case, it is preferable that, when two or more indoor units simultaneously execute the cleaning mode, 1) if the outdoor unit is abnormal and the continuity of the cleaning mode is affected, the air conditioning system is stopped and each indoor unit stops executing the cleaning mode; 2) if the outdoor unit is normal, part of the indoor units are abnormal to influence the continuity of the cleaning mode, and the rest of the indoor units are not abnormal or the abnormal type does not influence the continuity of the cleaning mode although the abnormal type exists, stopping the part of the indoor units from executing the cleaning mode, and keeping the rest of the indoor units in the cleaning mode; 3) if the outdoor unit and the indoor units are normal and the environmental temperature of part of the indoor units is abnormal (for example, the environmental temperature in the heating stage is greater than 36 ℃), the part of the indoor units stop executing the cleaning mode, and the rest indoor units continue to maintain the cleaning mode.

It should be understood that the present invention can freely combine each part and step in the embodiments, or appropriately change or omit each part and step in the embodiments within the scope thereof.