WO2021228271A1 - Emergency operation method for air-conditioning unit - Google Patents

Abstract

The present invention belongs to the technical field of heat exchange devices, and in particular relates to an emergency operation method for an air-conditioning unit. The present invention aims to solve the problem of the whole unit being turned off when some indoor units of an existing air-conditioning unit have a fault, thereby worsening the usage experience of all users. For this purpose, according to the emergency operation method for an air-conditioning unit in the present invention, by means of combining the fault degree of the air-conditioning unit and the current operation requirements of fault-free indoor units, the air-conditioning unit can be selectively enabled to continuously operate for a period of time, such that when the fault degree of the air-conditioning unit is relatively low and the air-conditioning unit meets a continuous operation condition, the operation time of the fault-free indoor units can be prolonged, such that users in rooms where other fault-free indoor units are located can continue to use the air-conditioning unit, thereby reducing the range of users affected by faulty indoor units, preventing the situation in which all users are unable to adjust the temperature by means of the air-conditioning unit once some of indoor units have a fault, reducing the maintenance waiting time of the users of the fault-free indoor units, and improving the usage experience of the users.

Description

Emergency operation method of air-conditioning unit Technical field

The invention belongs to the technical field of heat exchange equipment, and specifically relates to an emergency operation method of an air conditioning unit.

Background technique

With the increasing economic development and the continuous improvement of human living standards, the application of air conditioners is becoming more and more popular, and there are more and more application places. In addition to household air conditioners, large places such as apartments, office buildings, and commercial buildings generally use central air conditioners for cooling and heating. The refrigerant system of a central air conditioner usually includes multiple indoor units and one or more outdoor units, and the multiple indoor units are arranged in parallel to be distributed in different rooms for air temperature adjustment.

In the actual operation of the above-mentioned air conditioning unit, due to the complexity and variability of its operating environment and the normal wear and tear of the components of the air conditioning unit, some indoor units of the air conditioning unit may fail to operate. In this case, the air-conditioning unit usually sends out a fault reminder and stops running, so as to wait for the maintenance personnel to come and solve the fault. However, it usually takes a certain time for the maintenance personnel to reach the fault location and repair it, so during this period, all the temperature adjustment rooms of the air conditioning unit cannot be adjusted by the indoor unit, which seriously reduces the user experience.

Correspondingly, a new emergency operation method of air conditioning units is needed in the art to solve the above-mentioned problems.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the entire unit shuts down when part of the indoor unit of the existing air conditioning unit fails, and the use experience of all users is reduced, the present invention provides an emergency operation method of the air conditioning unit. The air conditioning unit includes at least one outdoor unit and a plurality of indoor units, and the emergency operation method includes: obtaining the total number of failed indoor units and the total rated load when the indoor unit fails; determining the indoor unit that has failed Whether the total number of units is greater than the set number; determine whether the total rated load of the malfunctioning indoor units is greater than the set load; if the total number of malfunctioning indoor units is not greater than the set number and the total number of malfunctioning indoor units If the constant load is not greater than the set load, it is determined whether the air conditioning unit has an indoor unit that is still operating normally; if the air conditioning unit has an indoor unit that is still operating normally, the outdoor unit is controlled to continue to operate in the current operating mode Preset time.

In the preferred technical solution of the above emergency operation method, the emergency operation method further includes: if the total number of malfunctioning indoor units is greater than the set number or the total rated load of the malfunctioning indoor units is greater than the set load , The air conditioning unit is stopped.

In the preferred technical solution of the above emergency operation method, the emergency operation method further includes: obtaining the cumulative emergency operation duration of the air conditioning unit; judging whether the cumulative emergency operation duration reaches a set duration; if the cumulative emergency operation duration When the set time is reached, the air conditioning unit is controlled to stop running.

In the preferred technical solution of the above emergency operation method, the set duration is determined according to the fault type of the malfunctioning indoor unit, and the step of "determining whether the cumulative emergency operation duration reaches the set duration" specifically includes: obtaining the occurrence The fault type of the malfunctioning indoor unit; call the corresponding pre-stored set time length according to the fault type; determine whether the accumulated emergency running time reaches the call-up pre-stored set time length.

In the preferred technical solution of the above emergency operation method, the step of "retrieving the corresponding pre-stored set duration according to the fault type" specifically includes: if there is an indoor unit with a fault type of power failure in the indoor unit that has a fault , Then further obtain the humidity of the environment where all the indoor units with power failures are located; filter the maximum humidity from the humidity of the environment where all the indoor units with the power failures are obtained; compare the selected maximum humidity with The preset humidity is compared; if the maximum humidity filtered out is greater than the preset humidity, then the first set duration is called as the set duration; if the maximum humidity filtered out is not greater than the preset For humidity, call the second set time period as the set time period; wherein, the first set time period is less than the second set time period.

In the preferred technical solution of the above emergency operation method, the step of "calling the corresponding pre-stored set duration according to the fault type" specifically includes: if all the fault types of the malfunctioning indoor unit are communication faults, calling The third set duration is the set duration.

In the preferred technical solution of the emergency operation method described above, the first set time period is 8 hours, and the second set time period is 24 hours.

In the preferred technical solution of the above emergency operation method, the emergency operation method further includes: if the failure types of the indoor units that have failed are all power failures, then during the emergency operation of the air conditioning unit, judging that all the failures have occurred Whether the failed indoor unit restores power supply; if all the failed indoor units restore power supply, the air conditioning unit is controlled to exit the emergency operation mode.

In the preferred technical solution of the above emergency operation method, the emergency operation method further includes: if there is an indoor unit whose failure type is a communication failure among the indoor units that have failed, then determining during the emergency operation of the air-conditioning unit Whether all the indoor units that are running normally stop running; if all the indoor units that are running normally stop running, control the outdoor units to stop running.

In the preferred technical solution of the above emergency operation method, the set number accounts for 40% of the total number of the multiple indoor units; and/or the set load accounts for 40% of the total rated load of the multiple indoor units 50%; and/or the preset time is 10 minutes.

Those skilled in the art can understand that the emergency operation method of the air-conditioning unit of the present invention can combine the degree of failure of the air-conditioning unit and the current operation requirements of the non-fault-free indoor unit to selectively make the air-conditioning unit continue to operate for a period of time, so as to The degree of failure of the air-conditioning unit is relatively minor, and the running time of the fault-free indoor unit is extended when the conditions for continuous operation are met, so that users in the room where other fault-free indoor units are located can continue to use the air-conditioning unit, reducing the range of users affected by the faulty indoor unit, and preventing the occurrence of If some indoor units are faulty, all users cannot change the indoor temperature through the air conditioning unit, which shortens the maintenance waiting time for users of indoor units that have not failed, and improves the user experience.

Preferably, the emergency operation method of the air-conditioning unit of the present invention can also control the air-conditioning unit to stop running under the condition of the accumulated operation time of the indoor unit, thereby avoiding the low-load condition of the air-conditioning unit due to the reduction in the number of indoor units in normal operation. Running down for a long time causes serious loss of compressors and other components.

Further, the emergency operation method of the air conditioning unit of the present invention can also determine the set duration according to the specific fault type. Specifically, the specific set duration can be determined according to the humidity of the indoor unit where the power failure occurs, so as to avoid Condensation and dripping of the indoor unit with power failure occurred during the emergency operation of the air-conditioning unit.

Description of the drawings

Figure 1 is a flow chart of the main steps of the emergency operation method of the air conditioning unit of the present invention;

Fig. 2 is a detailed step flowchart of a preferred embodiment of the emergency operation method of the air conditioning unit of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the drawings. In the description of the present invention, although the various steps of the control method of the present invention are described in a specific order in this application, these orders are not restrictive. Without departing from the basic principles of the present invention, those skilled in the art The steps can be performed in a different order.

Based on the problem that the entire unit shuts down when part of the indoor unit of the existing air conditioning unit fails, which reduces the use experience of all users, as pointed out in the background art, the present invention provides an emergency operation method for the air conditioning unit, which aims to enable the air conditioning unit to operate according to The specific fault level and the current operating requirements of the fault-free indoor unit are used to control the emergency operation of the air-conditioning unit, so as to shorten the maintenance waiting time of the user of the fault-free indoor unit and improve the user experience.

First, refer to FIG. 1, which is a flowchart of the main steps of the emergency operation method of the air conditioning unit of the present invention. As shown in Fig. 1, the air conditioning unit of the present invention includes at least one outdoor unit and a plurality of indoor units connected in parallel. Based on the air conditioning unit, the emergency operation method of the present invention includes the following main steps:

Step S1: In the case of a failure of the indoor unit, obtain the total number of the failed indoor unit and the total rated load;

Step S2: Determine whether the total number of malfunctioning indoor units is greater than the set number;

Step S3: Determine whether the total rated load of the malfunctioning indoor unit is greater than the set load;

Step S4: If the total number of malfunctioning indoor units is not greater than the set number and the total rated load of the malfunctioning indoor units is not greater than the set load, judge whether the air conditioning unit has indoor units that are still operating normally;

Step S5: If the air-conditioning unit has an indoor unit that is still operating normally, the outdoor unit is controlled to continue to operate for a preset time according to the current operation mode.

In the above step S1, the total rated load of the malfunctioning indoor unit is the sum of the rated loads of all malfunctioning indoor units. For example, when there are three indoor units that have failed and their rated loads are 2.5kw, 5kw, and 3kw, the total number of indoor units that have failed is 3, and the total rated load is 10.5kw.

In steps S2-S4, the "set number" is a set reference value used to measure the number of malfunctioning indoor units. By comparing the total number of malfunctioning indoor units with the set number, it can be determined whether the current number of malfunctioning indoor units is excessive. "Set load" is the reference value set to measure the total load of the malfunctioning indoor unit. By comparing the total rated load of the malfunctioning indoor unit with the set load, the current malfunctioning indoor unit can be determined Whether the total rated load is too large. When the total number of malfunctioning indoor units is less than or equal to the set number and the total rated load of the malfunctioning indoor units is less than or equal to the set load, it indicates that the number of malfunctioning indoor units is small, and these malfunctioning indoor units There is no indoor unit with a large rated load. Compared with all indoor units, the fault range is smaller and the degree is lighter. In this case, the air conditioning unit has the conditions to continue to operate, and it can further detect whether the air conditioning unit has a fault-free indoor unit that is still operating normally, so as to judge the operation of the remaining normal indoor unit of the air conditioning unit on the premise that the air conditioning unit can operate urgently need.

In step S5, when it is determined that the remaining normal indoor units of the air-conditioning unit have operating requirements, the outdoor unit is controlled to continue to operate for a preset time in the current operating mode, so as to extend the operating time of the trouble-free indoor unit and avoid running trouble-free indoor units The machine is directly shut down due to the cause of the failure. Among them, the current operating mode is a cooling mode or a heating mode in which the air conditioner has been running before the indoor unit fails.

When the outdoor unit continues to operate in the current operating mode, during the emergency operation of the air conditioner, when the outdoor unit continues to cool or heat, it can adapt to the current cooling or heating operating conditions according to the load changes on the indoor side Adjust operating parameters, such as compressor frequency, so that the outdoor unit can be more adapted to the situation that the number of partially operating indoor units is reduced due to failure and the load demand on the indoor side is reduced.

As an example, the set number is set to account for 40% of the total number of indoor units. The set load is set to account for 50% of the total rated load of the indoor unit. The preset time is 10min. Among them, the set quantity needs to select an integer when setting a specific value according to the corresponding ratio. For example, when the total number of indoor units is 8, if the set number is set to account for 40% of the total number of indoor units, the set number is 3. When the total rated load of all indoor units is 100kw, if the set load is set to account for 50% of the total rated load of the indoor unit, the set load is 500kw. Those skilled in the art can adaptively adjust the above-mentioned set number, set load or preset time according to the specific performance standards of the air conditioning unit and actual emergency operation requirements.

Further, the emergency operation method of the air conditioning unit of the present invention further includes:

If the total number of malfunctioning indoor units is greater than the set number or the total rated load of the malfunctioning indoor units is greater than the set load, the air conditioning unit is stopped.

In the above steps, if the total number of malfunctioning indoor units is greater than the set number, it indicates that the number of malfunctioning indoor units is too large, and the proportion of failures in the overall indoor unit is relatively large. It may cause the air conditioning unit to continue emergency operation. There is a possibility that the remaining non-fault-free indoor units may also malfunction. If the total rated load of the malfunctioning indoor unit is greater than the set load, it indicates that the proportion of the total load of the malfunctioning indoor unit is relatively large. For example, one or more of the malfunctioning indoor units are high-load indoor units. At this time, even if there is a fault-free indoor unit running on the indoor side, the load demand on the indoor side has been greatly reduced, and the air conditioning unit is in a very low load condition. Continued operation may cause some parts of the air conditioning unit to become functional. loss. Therefore, when at least one of the above two situations occurs, it means that the air-conditioning unit does not have the conditions to continue to operate and cannot continue to operate in the event of a failure.

Preferably, the emergency operation method of the air conditioning unit of the present invention further includes:

Obtain the cumulative emergency operation time of the air conditioning unit;

Judge whether the accumulated emergency operation time reaches the set time;

If the accumulated emergency operation time reaches the set time, the air conditioning unit is controlled to stop running.

In the above steps, "acquiring the cumulative emergency operating time of the air conditioning unit" specifically refers to acquiring the cumulative operating time of the air conditioning unit after the air conditioning unit has continuously operated for multiple set periods of time during this emergency operation. After the indoor unit of the air conditioning unit fails and it is judged for the first time that the outdoor unit can continue to operate in the current operating mode for a preset time, the total number and total rating of the indoor unit that have failed are obtained again while the outdoor unit runs for the preset time The load is used to judge whether the air-conditioning unit can continue emergency operation, and the preset time of the last operation is accumulated under the conditions of continuous emergency operation to accumulate the entire emergency operation time that the air-conditioning unit has been running, and at the same time, the outdoor unit is controlled to continue emergency operation. Once the air-conditioning unit does not comply with the emergency operation, the air-conditioning unit will be controlled to shut down and the accumulated operating time will be cleared. This emergency operation procedure ends. If the air conditioning unit always meets the emergency operation conditions during emergency operation, the outdoor unit and indoor unit will be turned off when the cumulative emergency operation time reaches the set time, so that the air conditioning unit will stop running, so as to avoid compression caused by the excessive emergency operation time of the air conditioning unit Serious wear and tear of accessories such as machines.

Preferably, the above-mentioned set duration is determined according to the fault type of the malfunctioning indoor unit, and the above-mentioned step of "determining whether the cumulative emergency operation duration reaches the set duration" specifically includes:

Get the fault type of the indoor unit that has the fault;

Recall the corresponding pre-stored set duration according to the fault type;

Judge whether the accumulated emergency running time reaches the pre-stored set time.

In the above steps, the data storage unit of the air conditioning unit stores at least one set of mapping data of the fault type and the set duration corresponding to the fault type. When the air-conditioning unit starts continuous emergency operation and accumulates the overall emergency operation time, the corresponding set time can be called through the specific fault type of the indoor unit, which is used as the longest operation standard of the accumulated emergency operation time, and the accumulated emergency operation time is accumulated When the current set time is reached, the emergency operation procedure ends and the air-conditioning unit stops running.

In a possible implementation manner, the above step of "retrieving the corresponding pre-stored set duration according to the fault type" specifically includes:

If there are indoor units with a power failure type among the indoor units that have a fault, the humidity of the environment in which all the indoor units with a power failure are located is further obtained;

Filter out the maximum humidity from the humidity of the environment where all the indoor units with power failures are obtained;

Compare the selected maximum humidity with the preset humidity;

If the maximum humidity filtered out is greater than the preset humidity, the first set duration is called as the set duration;

If the filtered maximum humidity is not greater than the preset humidity, the second set duration is called as the set duration;

Wherein, the first set duration is less than the second set duration.

In the above embodiment, when the indoor unit has a power failure, the air blowing device of the indoor unit stops operating due to the power failure, and the electronic expansion valve stays at the opening degree before the power failure. At this time, although the heat exchange device of the malfunctioning indoor unit can also flow through the refrigerant and exchange heat with the airflow inside the indoor unit, the heat-exchanged airflow is gathered inside the indoor unit and cannot be guided to the room. There is a temperature difference between the temperature of the indoor air. Therefore, when the indoor humidity is high, especially in summer, the indoor humidity is generally high. If the air conditioning unit continues to operate for a long time, a large amount of cold air will be collected inside the indoor unit and condensation will occur. The indoor unit that caused the power failure was dripping outward. In this case, the emergency operation method of the air conditioning unit of the present invention sets a preset humidity when the indoor unit has a power failure as a measure of indoor humidity, and when the indoor unit has a power failure, the humidity is relatively high and easy Set a smaller set time during condensation to shorten the overall emergency operation time of the air-conditioning unit, and avoid excessively long emergency operation time of the air-conditioning unit, which may cause condensation and dripping of the indoor unit that has a power failure. On this basis, in view of the differences in the humidity of different environments in the indoor unit, such as the room where some indoor units are located are relatively humid or are additionally equipped with humidification devices, when there is more than one indoor unit with a power failure, obtain The humidity of the environment in which each indoor unit that has a power failure occurs, and the maximum humidity is filtered out, so as to determine the set time based on the maximum humidity, so that any indoor unit that has a power failure during the emergency operation of the air conditioning unit is not Dripping will occur to avoid degrading the user experience. Wherein, the specific values of the first set time period and the second set time period can be set according to the actual humidity environment of the operating place of the air conditioning unit. As an example, the first set duration may be set to 8h, and the second set duration may be set to 24h.

In another possible implementation manner, the above step of "calling the corresponding pre-stored set duration according to the fault type" specifically includes:

If all the fault types of the malfunctioning indoor units are communication faults, the third set duration is called as the set duration.

In the above embodiment, when the indoor unit has a communication failure, the electronic expansion valve of the indoor unit is closed, and the indoor unit cannot generate heat exchange airflow. At this time, the third set duration can be set according to the bearing capacity of the air conditioning unit under a lower load, as long as the set third set duration can avoid the large loss of the air conditioning unit due to long-term emergency operation. For example, set the third set duration to 8h.

In a possible implementation manner, the failure type of the malfunctioning indoor unit includes both a communication failure and a power failure. At this time, the specific setting time length is further determined according to the magnitude relationship between the first setting time length, the second setting time length, and the third setting time length. For example, when the first set duration is greater than or equal to the third set duration, in order to prevent the cumulative emergency operation duration of the air conditioning unit from exceeding the third duration and the air conditioning unit from experiencing large losses, the set duration can be determined as the third setting The duration, so that the overall emergency operation duration of the outdoor unit does not exceed the third set duration. When the first set time and the second set time are both less than the third set time, in order to avoid the high humidity of the indoor unit with power failure and condensation, the comparison result of the maximum humidity and the preset humidity can be used The set duration is determined to be the first set duration or the second set duration, and at the same time, the cumulative emergency operation duration of the outdoor unit will not exceed the third set duration. When the third set duration is greater than the first set duration and less than the second set duration, in order to avoid the high humidity of the indoor unit with power failure and condensation, the comparison result of the maximum humidity and the preset humidity can be used , When the maximum humidity is greater than the preset humidity, the first set duration is called as the set duration, and when the maximum humidity is less than or equal to the preset humidity, the third set duration is called as the set duration.

Based on any of the aforementioned emergency operation methods, preferably, the emergency operation method of the present invention further includes:

If all the fault types of the indoor units that have failed are power failures, in the process of emergency operation of the air conditioning unit, determine whether all the indoor units that have failed to restore power;

If all the malfunctioning indoor units restore power, control the air conditioning unit to exit the emergency operation mode.

In the above-mentioned embodiment, whether it is during the preset time period of the outdoor unit's first emergency operation or during the cumulative emergency operation time of the outdoor unit, if all the indoor units with a power failure are restored to power, all the indoor units on the indoor side will be restored to nothing. In the fault state, the air-conditioning unit is controlled to exit the emergency operation mode of the present invention, the outdoor unit re-adjusts the operating parameters according to all the running indoor units, and the air-conditioning unit returns to the normal operation mode.

Based on any of the aforementioned emergency operation methods, preferably, the emergency operation method of the present invention further includes:

If there is an indoor unit with a fault type of communication failure among the indoor units that have failed, during the emergency operation of the air conditioning unit, it is determined whether all the indoor units that are operating normally stop running;

If all indoor units that are operating normally stop running, the outdoor unit is controlled to stop running.

In the above embodiment, whether it is during the preset time of the first emergency operation of the outdoor unit or the accumulated emergency operation time of the outdoor unit, since it is difficult for the indoor unit that has a communication failure to recover by itself without manual repair, so during the emergency operation of the air conditioning unit There is always a communication failure in the indoor unit that has failed. At this time, if the running indoor unit is turned off, there is no running indoor unit on the indoor side and the malfunctioning indoor unit cannot be restored to a running indoor unit, so the air conditioning unit has no Operation requirements, control the outdoor unit to stop running.

Regarding the emergency operation method in any of the foregoing embodiments, the emergency operation method of the present invention further includes:

In the case of an indoor unit failure, the indoor unit is made to display failure type information and/or issue a failure alarm, while the outdoor unit is made to display failure type information, so as to provide users or maintenance personnel with details of the failure.

Referring again to FIG. 2, FIG. 2 is a detailed step flowchart of a preferred embodiment of the emergency operation method of the air conditioning unit of the present invention. As shown in Figure 2, in the case where the preset time is 10 minutes and the second set time is less than the third set time, the emergency operation method of the air conditioning unit of the present invention specifically includes:

Step S100: In the case that the indoor unit fails, obtain the total number N and the total rated load Q of the failed indoor units;

Step S101: Determine whether the acquired total number N is greater than the set number N ₀ and whether the total rated load Q is greater than the set load Q ₀ ;

If the acquired total number N is not greater than the set number N ₀ and the total rated load Q is not greater than the set load Q ₀ , then step S102 is executed. If the acquired total number N is greater than the set number N ₀ or the total rated load Q is greater than the set At a constant load Q ₀ , step S1013 is executed;

Step S102: Determine whether the air conditioning unit has an indoor unit that is still operating normally;

If the air conditioning unit has an indoor unit that is still operating normally, execute step S103; otherwise, execute step S1013;

Step S103: Control the outdoor unit to continue to run for 10 minutes in the current operating mode;

Step S104: Obtain the cumulative emergency operation time of the air conditioning unit;

Step S105: Obtain the fault type of the indoor unit that has the fault;

If part or all of the fault type of the malfunctioning indoor unit is a power failure, step S106 is executed, and if all the malfunction types of the malfunctioning indoor unit are communication failures, then step S1011 is executed;

Step S106: Obtain the humidity of the environment where all the indoor units with power failures are located;

_{Step S107: filter the maximum humidity H max} from the humidity of the environment where all the indoor units that have the power failure failure are obtained;

Step S108: Determine whether the maximum humidity H _max is greater than the preset humidity H ₀ ;

If the maximum humidity H _{max is} greater than the preset humidity H ₀ , step S109 is performed, and if the maximum humidity H _{max is} not greater than the preset humidity H ₀ , step S1010 is performed;

Step S109: Call the first set duration as the set duration;

Step S1010: call the second set duration as the set duration;

Step S1011: call the third set duration as the set duration;

Step S1012: Judge whether the cumulative emergency operation duration of the outdoor unit reaches the set duration of the call;

If the accumulated emergency operation duration reaches the recalled set duration, execute step S1013, otherwise, return to step S101;

Step S1013: Control the outdoor unit and indoor unit of the air conditioning unit to stop running.

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

Claims (10)

1. An emergency operation method of an air conditioning unit, characterized in that the air conditioning unit includes at least one outdoor unit and a plurality of indoor units, and the emergency operation method includes:

   In the case of an indoor unit failure, obtain the total number of failed indoor units and the total rated load;

   Determine whether the total number of malfunctioning indoor units is greater than the set number;

   Determine whether the total rated load of the malfunctioning indoor unit is greater than the set load;

   If the total number of malfunctioning indoor units is not greater than the set number and the total rated load of the malfunctioning indoor units is not greater than the set load, determining whether the air conditioning unit has indoor units that are still operating normally;

   If the air conditioning unit has an indoor unit that is still operating normally, the outdoor unit is controlled to continue to operate for a preset time according to the current operation mode.
2. The emergency operation method according to claim 1, wherein the emergency operation method further comprises:

   If the total number of malfunctioning indoor units is greater than the set number or the total rated load of the malfunctioning indoor units is greater than the set load, the air conditioning unit is stopped.
3. The emergency operation method according to claim 1, wherein the emergency operation method further comprises:

   Acquiring the cumulative emergency operation time of the air conditioning unit;

   Judge whether the cumulative emergency operation duration reaches the set duration;

   If the accumulated emergency operation time reaches the set time, the air conditioning unit is controlled to stop running.
4. The emergency operation method according to claim 3, wherein the set time length is determined according to the fault type of the indoor unit that has the fault, and the step of "determining whether the cumulative emergency operation time length reaches the set time length" is specific include:

   Get the fault type of the indoor unit that has the fault;

   Recall the corresponding pre-stored set duration according to the fault type;

   It is judged whether the accumulated emergency running time length reaches the pre-stored set time length that is called.
5. The emergency operation method according to claim 4, wherein the step of "calling the corresponding pre-stored set duration according to the fault type" specifically comprises:

   If there are indoor units with a power failure type among the indoor units that have a fault, the humidity of the environment in which all the indoor units with a power failure are located is further obtained;

   Filter out the maximum humidity from the humidity of the environment where all the indoor units with power failures are obtained;

   Comparing the selected maximum humidity with a preset humidity;

   If the filtered maximum humidity is greater than the preset humidity, call the first set duration as the set duration;

   If the filtered maximum humidity is not greater than the preset humidity, call the second set duration as the set duration;

   Wherein, the first set duration is less than the second set duration.
6. The emergency operation method according to claim 4, wherein the step of "calling the corresponding pre-stored set duration according to the fault type" specifically comprises:

   If all the fault types of the malfunctioning indoor units are communication faults, the third set time period is called as the set time period.
7. The emergency operation method according to claim 5, wherein the first set duration is 8h, and the second set duration is 24h.
8. The emergency operation method according to claim 1, wherein the emergency operation method further comprises:

   If all the fault types of the indoor units that have failed are power failures, in the process of emergency operation of the air-conditioning unit, it is determined whether all the indoor units that have failed to restore power supply;

   If all the malfunctioning indoor units restore power, the air conditioning unit is controlled to exit the emergency operation mode.
9. The emergency operation method according to claim 1, wherein the emergency operation method further comprises:

   If there is an indoor unit whose fault type is a communication failure among the indoor units that have failed, in the process of emergency operation of the air conditioning unit, it is determined whether all the indoor units that are operating normally stop running;

   If all indoor units that are operating normally stop running, control the outdoor units to stop running.
10. The emergency operation method according to any one of claims 1 to 9, characterized in that,

    The set number accounts for 40% of the total number of the multiple indoor units; and/or

    The set load accounts for 50% of the total rated load of the multiple indoor units; and/or the preset time is 10 minutes.

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