CN111076349B

CN111076349B - Operation control method and device, storage medium and air conditioner

Info

Publication number: CN111076349B
Application number: CN201911347959.1A
Authority: CN
Inventors: 罗承荷; 华洪香
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2021-01-26
Anticipated expiration: 2039-12-24
Also published as: CN111076349A

Abstract

The invention discloses an operation control method, an operation control device, a storage medium and an air conditioner, wherein the method comprises the following steps: acquiring the outdoor environment temperature of the air conditioner, and acquiring the first exhaust pipe temperature, the running current and the first continuous running time of a compressor of the air conditioner; determining a current protection value and a current protection duration time of the compressor according to the acquired outdoor environment temperature, the first exhaust pipe temperature of the compressor and the first duration time; and protecting the operation process of the compressor according to the acquired temperature of the first exhaust pipe of the compressor, the determined current protection value and the determined current protection duration of the compressor. The scheme of the invention can solve the problem that the running performance of the fixed-frequency compressor is influenced because the current flowing through the fixed-frequency compressor is only detected for protection and cannot adapt to different working conditions, thereby achieving the effect of improving the running performance of the fixed-frequency compressor.

Description

Operation control method and device, storage medium and air conditioner

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to an operation control method and device, a storage medium and an air conditioner, in particular to a constant-frequency compressor operation protection detection method and device, a storage medium and an air conditioner.

Background

In the overload protection scheme of the fixed-frequency compressor, the current flowing through the fixed-frequency compressor is generally detected, and when the current is greater than or equal to a set current threshold value, the compressor stops running, so that the fixed-frequency compressor is prevented from entering overload protection. However, the scheme cannot adapt to different working conditions, such as severe overload working conditions or dirty and blocked systems, the current of the fixed-frequency compressor is generally large when the fixed-frequency compressor is started, according to the scheme, the fixed-frequency compressor can enter overcurrent protection shutdown too early, and under severe conditions, the fixed-frequency compressor may enter shutdown as soon as the fixed-frequency compressor is started, and if the set current threshold is increased and the fixed-frequency compressor is protected under stable operation conditions, the fixed-frequency compressor cannot enter the overcurrent protection shutdown fixed-frequency compressor in advance because the set current threshold is too large, but directly enters the overload protection shutdown fixed-frequency compressor.

In addition, the protection setting condition of the scheme is simple, the detection current is constant, although the fixed-frequency compressor can be prevented from entering overload protection to a certain extent, the control mode is rough, the adaptability is poor, and the performance of the fixed-frequency compressor can not be fully exerted under different working conditions, so that the performance of the air conditioner and the user experience are influenced to a certain extent.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention aims to provide an operation control method, an operation control device, a storage medium and an air conditioner, aiming at overcoming the defects that the operation performance of a fixed-frequency compressor is influenced because the current flowing through the fixed-frequency compressor is only detected for protection and cannot adapt to different working conditions, and the operation performance of the fixed-frequency compressor is improved.

The invention provides an operation control method, which comprises the following steps: acquiring the outdoor environment temperature of the air conditioner, and acquiring the first exhaust pipe temperature, the running current and the first continuous running time of a compressor of the air conditioner; determining a current protection value and a current protection duration time of the compressor according to the acquired outdoor environment temperature, the first exhaust pipe temperature of the compressor and the first duration time; and protecting the operation process of the compressor according to the acquired temperature of the first exhaust pipe of the compressor, the determined current protection value and the determined current protection duration of the compressor.

Optionally, determining the current protection value and the current protection duration of the compressor comprises: determining whether a first duration time of the compressor is less than or equal to a first set time; if the first continuous operation time of the compressor is less than or equal to the first set time, determining that the compressor operates in a first set stage, and determining the current protection value and the current protection duration of the compressor in the first set stage; and if the first continuous operation time of the compressor is greater than the first set time, determining that the compressor operates in a second set stage, and determining the current protection value and the current protection duration time of the compressor in the second set stage.

Optionally, determining the current protection value and the current protection duration of the compressor in a first setting stage includes: determining a first temperature interval in which the outdoor environment temperature is within a first set temperature range, and determining a second temperature interval in which a temperature difference between the first exhaust pipe temperature of the compressor and the outdoor environment temperature is within a second set temperature range; and determining a first set current protection value and a first set current protection duration time in the first set stage corresponding to a first set temperature interval which is the same as the first temperature interval and a second set temperature interval which is the same as the second temperature interval in the first corresponding relationship as the first current protection value and the first set current protection duration time in the first set stage corresponding to the first set temperature interval, the second set temperature interval and the first set current protection duration time in the first set stage corresponding to the first temperature interval and the second temperature interval based on the first set temperature interval, the second set temperature interval and the first corresponding relationship between the first set current protection value and the first set current protection duration time in the first set stage.

Optionally, determining the current protection value and the current protection duration of the compressor in a second setting stage includes: determining whether a first discharge pipe temperature of the compressor is greater than or equal to a first set discharge temperature; if the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, acquiring second continuous operation time when the first exhaust pipe temperature of the compressor is greater than or equal to the first set temperature, and acquiring second exhaust pipe temperature of the compressor when the second continuous operation time is subtracted by the second set time; determining whether a temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to a second set exhaust temperature; if the temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to the second set exhaust temperature, determining a third temperature interval in which the outdoor environment temperature is within a third set temperature range; and determining a second set current protection value and a second set current protection duration time in a second set stage corresponding to a third set temperature interval which is the same as the third temperature interval in the second corresponding relationship as the second current protection value and the second current protection duration time in the second set stage corresponding to the third set temperature interval based on the third set temperature interval and a second corresponding relationship between the second set current protection value and the second set current protection duration time in the second set stage.

Optionally, the protection of the operation process of the compressor comprises: determining whether an operation current of the compressor is greater than or equal to a first current protection value; if the operation current of the compressor is greater than or equal to the first current protection value, determining whether a third continuous operation time, in which the operation current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration; and if the third continuous operation time with the operation current of the compressor being larger than or equal to the first current protection value is larger than or equal to the first current protection duration, controlling the compressor and the related load shutdown protection of the compressor.

Optionally, the protection of the operation process of the compressor further comprises: if the compressor and the associated load shutdown protection of the compressor are controlled in the first setting stage, recording first protection times of the compressor and the associated load shutdown protection of the compressor, and determining whether the first protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the first setting protection times in the first setting stage; if the compressor and the first protection times of the shutdown protection of the associated load of the compressor are greater than or equal to the first set protection times in the first set stage, controlling the air conditioner to be shut down, initiating a first reminding message that the air conditioner has current faults in the first set stage, and resetting the recorded value of the first protection times; and if the first protection times of the compressor and the related load shutdown protection of the compressor are less than the first set protection times in the first set stage, controlling the air conditioner to restart after the compressor and the related load shutdown protection of the compressor for a third set time.

Optionally, the protection of the operation process of the compressor further comprises: determining whether an operation current of the compressor is greater than or equal to a second current protection value; if the running current of the compressor is greater than or equal to the second current protection value, determining whether the fourth continuous running time of the running current of the compressor, which is greater than or equal to the second current protection value, is greater than or equal to the second current protection duration, and determining whether the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature; and if the fourth continuous operation time that the operation current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection duration and the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, controlling the compressor and the related load shutdown protection of the compressor.

Optionally, the protection of the operation process of the compressor further comprises: if the compressor and the associated load shutdown protection of the compressor are controlled in the second setting stage, recording second protection times of the compressor and the associated load shutdown protection of the compressor, and determining whether the second protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the second setting protection times in the second setting stage; if the second protection times of the compressor and the related load shutdown protection of the compressor are greater than or equal to the second set protection times in the first set stage, controlling the air conditioner to shutdown, initiating a second reminding message that the air conditioner has current faults in the second set stage, and resetting the recorded value of the second protection times; and if the second protection times of the compressor and the related load shutdown protection of the compressor are less than the second set protection times in the second set stage, controlling the air conditioner to restart after the fourth set time of the compressor and the related load shutdown protection of the compressor.

In accordance with the above method, another aspect of the present invention provides an operation control apparatus, including: the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the outdoor environment temperature of the air conditioner and acquiring the first exhaust pipe temperature, the running current and the first continuous running time of a compressor of the air conditioner; the determining unit is used for determining a current protection value and a current protection duration time of the compressor according to the acquired outdoor environment temperature, the first exhaust pipe temperature of the compressor and the first continuous operation time; and the control unit is used for protecting the operation process of the compressor according to the acquired temperature of the first exhaust pipe of the compressor, and the determined current protection value and current protection duration of the compressor.

Optionally, the determining unit determines a current protection value and a current protection duration of the compressor, including: determining whether a first duration time of the compressor is less than or equal to a first set time; if the first continuous operation time of the compressor is less than or equal to the first set time, determining that the compressor operates in a first set stage, and determining the current protection value and the current protection duration of the compressor in the first set stage; and if the first continuous operation time of the compressor is greater than the first set time, determining that the compressor operates in a second set stage, and determining the current protection value and the current protection duration time of the compressor in the second set stage.

Optionally, the determining unit determines the current protection value and the current protection duration of the compressor at a first setting stage, including: determining a first temperature interval in which the outdoor environment temperature is within a first set temperature range, and determining a second temperature interval in which a temperature difference between the first exhaust pipe temperature of the compressor and the outdoor environment temperature is within a second set temperature range; and determining a first set current protection value and a first set current protection duration time in the first set stage corresponding to a first set temperature interval which is the same as the first temperature interval and a second set temperature interval which is the same as the second temperature interval in the first corresponding relationship as the first current protection value and the first set current protection duration time in the first set stage corresponding to the first set temperature interval, the second set temperature interval and the first set current protection duration time in the first set stage corresponding to the first temperature interval and the second temperature interval based on the first set temperature interval, the second set temperature interval and the first corresponding relationship between the first set current protection value and the first set current protection duration time in the first set stage.

Optionally, the determining unit determines the current protection value and the current protection duration of the compressor in a second setting stage, including: determining whether a first discharge pipe temperature of the compressor is greater than or equal to a first set discharge temperature; if the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, acquiring second continuous operation time when the first exhaust pipe temperature of the compressor is greater than or equal to the first set temperature, and acquiring second exhaust pipe temperature of the compressor when the second continuous operation time is subtracted by the second set time; determining whether a temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to a second set exhaust temperature; if the temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to the second set exhaust temperature, determining a third temperature interval in which the outdoor environment temperature is within a third set temperature range; and determining a second set current protection value and a second set current protection duration time in a second set stage corresponding to a third set temperature interval which is the same as the third temperature interval in the second corresponding relationship as the second current protection value and the second current protection duration time in the second set stage corresponding to the third set temperature interval based on the third set temperature interval and a second corresponding relationship between the second set current protection value and the second set current protection duration time in the second set stage.

Optionally, the control unit protects the operation process of the compressor, and includes: determining whether an operation current of the compressor is greater than or equal to a first current protection value; if the operation current of the compressor is greater than or equal to the first current protection value, determining whether a third continuous operation time, in which the operation current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration; and if the third continuous operation time with the operation current of the compressor being larger than or equal to the first current protection value is larger than or equal to the first current protection duration, controlling the compressor and the related load shutdown protection of the compressor.

Optionally, the control unit protects the operation process of the compressor, and further includes: if the compressor and the associated load shutdown protection of the compressor are controlled in the first setting stage, recording first protection times of the compressor and the associated load shutdown protection of the compressor, and determining whether the first protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the first setting protection times in the first setting stage; if the compressor and the first protection times of the shutdown protection of the associated load of the compressor are greater than or equal to the first set protection times in the first set stage, controlling the air conditioner to be shut down, initiating a first reminding message that the air conditioner has current faults in the first set stage, and resetting the recorded value of the first protection times; and if the first protection times of the compressor and the related load shutdown protection of the compressor are less than the first set protection times in the first set stage, controlling the air conditioner to restart after the compressor and the related load shutdown protection of the compressor for a third set time.

Optionally, the control unit protects the operation process of the compressor, and further includes: determining whether an operation current of the compressor is greater than or equal to a second current protection value; if the running current of the compressor is greater than or equal to the second current protection value, determining whether the fourth continuous running time of the running current of the compressor, which is greater than or equal to the second current protection value, is greater than or equal to the second current protection duration, and determining whether the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature; and if the fourth continuous operation time that the operation current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection duration and the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, controlling the compressor and the related load shutdown protection of the compressor.

Optionally, the control unit protects the operation process of the compressor, and further includes: if the compressor and the associated load shutdown protection of the compressor are controlled in the second setting stage, recording second protection times of the compressor and the associated load shutdown protection of the compressor, and determining whether the second protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the second setting protection times in the second setting stage; if the second protection times of the compressor and the related load shutdown protection of the compressor are greater than or equal to the second set protection times in the first set stage, controlling the air conditioner to shutdown, initiating a second reminding message that the air conditioner has current faults in the second set stage, and resetting the recorded value of the second protection times; and if the second protection times of the compressor and the related load shutdown protection of the compressor are less than the second set protection times in the second set stage, controlling the air conditioner to restart after the fourth set time of the compressor and the related load shutdown protection of the compressor.

In accordance with another aspect of the present invention, there is provided an air conditioner including: the operation control device described above.

In accordance with the above method, a further aspect of the present invention provides a storage medium comprising: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the operation control method by the processor.

In accordance with the above method, another aspect of the present invention provides an air conditioner, comprising: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded by the processor and execute the operation control method.

According to the scheme, the compressor overcurrent control method is optimized by utilizing the ambient temperature bulb of the outdoor unit of the air conditioner, the exhaust pipe temperature bulb of the compressor and the compressor current sensor under the condition that the cost is not increased, so that the compressor is stopped working under the condition that the compressor really has overcurrent, the phenomenon that the performance and the user experience of the air conditioner are influenced when the compressor enters the current protection too early is avoided, the running performance of the compressor can be improved, and the user experience is improved.

Further, according to the scheme of the invention, the control method of the over-current of the compressor is optimized under the condition of not increasing the cost by utilizing the ambient temperature bulb of the outdoor unit of the air conditioner, the exhaust pipe temperature bulb of the compressor and the current sensor of the compressor, so that the compressor can adapt to different working conditions, the compressor can be stopped by entering the over-current in advance before entering the over-load protection, the compressor is prevented from entering the over-load protection, the performance of the compressor is fully exerted, and the user experience effect is improved.

Further, according to the scheme of the invention, the current protection value and the current protection duration time of the compressor are automatically adjusted according to the environment temperature value of the outdoor unit, the temperature value of the exhaust pipe of the compressor and the running time of the compressor; and the compressor is protected according to the running current value of the compressor, the adjusted current protection value of the compressor and the current protection duration time, extra cost is not required to be added, shutdown protection is performed before the compressor is overloaded under different conditions, and the precision is high.

Further, according to the scheme of the invention, the current protection value and the current protection duration time of the compressor are automatically adjusted according to the environment temperature value of the outdoor unit, the temperature value of the exhaust pipe of the compressor and the running time of the compressor; the compressor is protected according to the running current value of the compressor, the adjusted current protection value of the compressor and the adjusted current protection duration time of the compressor, the compressor is enabled to run under different conditions, the most appropriate current protection value and current protection duration time are selected, the compressor can be prevented from entering overload protection, the compressor can be prevented from entering over-current protection too early to stop the compressor, accordingly, the running stability and reliability of the air conditioner are improved, the comfort is improved, and the user experience is improved.

Further, according to the scheme of the invention, the current protection value and the current protection duration of the compressor are automatically adjusted by utilizing the outdoor environment temperature value of the air conditioner and the temperature value of the exhaust pipe of the compressor, for example, utilizing the detection value of the environment temperature bulb of the outdoor unit of the air conditioner and the detection value of the exhaust pipe temperature bulb of the compressor; the compressor is protected according to the running current of the compressor, the adjusted current protection value and current protection time of the compressor, the compressor is enabled to run under different conditions, the most appropriate current protection value and current protection duration are selected to optimize a control method of compressor overcurrent, the compressor is stopped to work under the necessary condition, the phenomenon that the performance and user experience of the air conditioner are affected due to the fact that the compressor enters the current protection too early is avoided, the performance of the compressor is fully played, and the user experience effect is improved.

Therefore, according to the scheme of the invention, the current protection value and the current protection duration time of the compressor are adjusted according to the outdoor environment temperature of the air conditioner, the temperature of the exhaust pipe of the compressor and the continuous operation time of the compressor; and according to the running current of the compressor, the adjusted current protection value and the adjusted current protection duration time of the compressor, the compressor is enabled to run under different conditions, the most appropriate current protection value and the most appropriate current protection duration time are selected, the problem that the running performance of the fixed-frequency compressor is influenced because the current flowing through the fixed-frequency compressor is only detected for protection, the fixed-frequency compressor cannot adapt to different working conditions is solved, and the effect of improving the running performance of the fixed-frequency compressor is achieved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic flow chart diagram illustrating an embodiment of an operation control method according to the present invention;

FIG. 2 is a schematic flow chart illustrating an embodiment of determining the current protection value and the current protection duration of the compressor according to the method of the present invention;

FIG. 3 is a schematic flow chart illustrating an embodiment of determining the current protection value and the current protection duration of the compressor at the first setting stage in the method of the present invention;

FIG. 4 is a schematic flow chart illustrating an embodiment of determining the current protection value and the current protection duration of the compressor at the second setting stage in the method of the present invention;

FIG. 5 is a schematic flow chart illustrating an embodiment of a first protection process for protecting the operation of the compressor at a first setting stage in the method of the present invention;

FIG. 6 is a schematic flow chart illustrating an embodiment of a second protection procedure for protecting the operation of the compressor at a first setting stage in the method of the present invention;

FIG. 7 is a schematic flow chart illustrating an embodiment of a first protection process for protecting the operation of the compressor at a second setting stage in the method of the present invention;

FIG. 8 is a schematic flow chart illustrating an embodiment of a second protection procedure for protecting the operation of the compressor at a second setting stage in the method of the present invention;

FIG. 9 is a schematic structural diagram of an embodiment of the operation control device of the present invention;

FIG. 10 is a flowchart illustrating a method for detecting and controlling the operation protection of the fixed-frequency compressor according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a control device for operation protection of a fixed-frequency compressor according to an embodiment of the air conditioner of the present invention.

The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:

102-an obtaining unit; 104-a determination unit; 106-control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to an embodiment of the present invention, an operation control method is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The operation control method may include: step S110 to step S130.

At step S110, after the air conditioner is powered on to operate, an outdoor ambient temperature of the air conditioner is acquired, and a first discharge pipe temperature, an operation current, and a first continuous operation time of a compressor of the air conditioner are acquired.

Wherein the ambient outdoor temperature, e.g. outdoor unit of air-conditionerAmbient temperature T of_{Outer ring}. Temperature of first discharge pipe of compressor of air conditioner, e.g. temperature T of discharge pipe of compressor_{Exhaust of gases}. Operating current of compressor of air conditioner, e.g. operating current I of compressor_comp. First duration of operation of compressor of air conditioner, e.g. duration of operation t of compressor_compI.e. the duration t of the compressor taken after the compressor has started_comp。

For example: the air conditioner is started to run, and after the compressor is started, the ambient temperature T of the outdoor unit of the air conditioner is synchronously detected in real time_{Outer ring}Temperature T of compressor discharge pipe_{Exhaust of gases}Running current I of the compressor_compDuration of compressor operation time t_comp。

The outdoor environment temperature and the exhaust temperature of the compressor can be acquired by utilizing some temperature sensors of the air conditioner, and the cost is not increased. Therefore, the shutdown protection before the compressor enters overload can be realized by using some hardware platforms without additionally increasing the cost under different conditions, and the precision is high. For example: the outdoor unit ambient temperature sensor of the air conditioner can be used for detecting the ambient temperature of the outdoor unit of the air conditioner. The temperature sensor of the compressor exhaust pipe of the air conditioner can be used for detecting the temperature of the exhaust pipe of the compressor. The compressor current sensor of the air conditioner can be used for detecting the current of the compressor.

At step S120, a current protection value and a current protection duration of the compressor are determined according to the acquired outdoor ambient temperature, and a first exhaust pipe temperature, an operation current and/or a first duration time of the compressor.

The determination of the current protection value and the current protection duration of the compressor can be performed in two stages, namely a compressor starting stage and a compressor stable operation stage, and specifically can be determined according to the outdoor environment temperature and the compressor exhaust pipe based on a large amount of experimental data. If in the starting stage of the compressor, the current protection value and the current protection duration of the compressor can be determined according to the outdoor environment temperature and the temperature of the exhaust pipe of the compressor; for example, in the compression stable operation stage, the current protection value and the current protection duration of the compressor can be determined by the outdoor environment temperature.

For example: the outdoor unit environment temperature detection circuit of the air conditioner can be used for converting a temperature signal of an outdoor unit environment temperature sensor into a data signal required by a detection control arithmetic unit. The temperature detection circuit of the compressor exhaust pipe of the air conditioner can be used for converting a temperature signal of the compressor exhaust pipe temperature sensor into a data signal required by the detection control arithmetic unit. The current sensor of the air conditioner can be used for converting the current signal of the current sensor of the compressor into a data signal required by the detection control arithmetic unit. The compressor control circuit of the air conditioner can be used for controlling the on and off of the compressor.

For another example: the detection control operation unit of the air conditioner can be used for receiving data signals of an outdoor unit environment temperature detection circuit, a compressor exhaust pipe temperature detection circuit and a current sensor, judging, operating, judging and comparing the data signals, and finding out the most suitable current protection value and current protection duration of the compressor in different operation stages and conditions; the method can be used for comparing the running current of the compressor with the current protection value and the running current duration time and the current protection duration time meeting the conditions, thereby controlling the compressor control circuit and controlling the compressor to work or stop.

Alternatively, the specific process of determining the current protection value and the current protection duration of the compressor in step S120 can be seen in the following exemplary description.

The following further describes a specific process of determining the current protection value and the current protection duration of the compressor in step S120, with reference to a flowchart of an embodiment of determining the current protection value and the current protection duration of the compressor in the method of the present invention shown in fig. 2, and the specific process may include: step S210 to step S230.

In step S210, it is determined whether the first duration time of the compressor is less than or equal to a first set time. Wherein, the first setting time is, for example, the time constant t of the stage after the compressor is started is judged_a。

In step S220, if the first duration time of the compressor is less than or equal to the first setting time, it is determined that the compressor is operating in the first setting stage, such as the start stage of the compressor, and the current protection value and the current protection duration time of the compressor are determined in the first setting stage.

For example: judging the stage of the compressor after operation, if the continuous operation time t of the compressor_comp≦t_aThe compressor is operating in the start-up phase. Wherein, t_aIn order to judge the time constant of the compressor at the stage after starting, the size of the time constant can be set to different values according to different air conditioners and compressors, and the optimal time is 1-5 seconds.

More optionally, the specific process of determining the current protection value and the current protection duration of the compressor in the first setting stage in step S220 may further be described with reference to a flowchart of an embodiment of determining the current protection value and the current protection duration of the compressor in the first setting stage in the method of the present invention shown in fig. 3, which may include: step S300 and step S320.

And step S300, under the condition that the compressor operates in the first set stage, determining a first temperature interval in which the outdoor environment temperature is within a first set temperature range, and determining a second temperature interval in which the temperature difference between the first exhaust pipe temperature of the compressor and the outdoor environment temperature is within a second set temperature range.

Wherein the first set temperature range is as shown in Table 1 for outdoor ambient temperature T_{Outer ring}The temperature is in a set temperature range of-20 ℃ to 60 ℃. A first temperature interval, e.g. the outdoor ambient temperature T in Table 1_{Outer ring}The actual temperature range of the outdoor environment temperature of the air conditioner is within the set temperature range of-20 ℃ to 60 ℃.

A second set temperature range, e.g. first exhaust pipe temperature T in Table 1_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}The temperature difference Δ T between them lies in a set temperature range of 0 ℃ to 120 ℃. Second temperature interval, e.g. first exhaust pipe temperature T in Table 1_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}A set temperature difference between 0 ℃ and 120 ℃ at which the temperature difference Δ T is located betweenActually acquired temperature T of the first exhaust pipe of the air conditioner in any set temperature difference interval within the value range_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}The temperature difference Δ T between them is in the actual temperature difference interval in which the set temperature range of-20 ℃ to 60 ℃ is situated.

Step S320, according to the first temperature interval and the second temperature interval, based on the first temperature interval, the second temperature interval, and the first corresponding relationship between the first set current protection value and the first set current protection duration in the first set phase, determining the first set current protection value and the first set current protection duration in the first set phase corresponding to the first temperature interval and the second temperature interval in the first corresponding relationship as the first current protection value and the first current protection duration in the first set phase corresponding to the first temperature interval and the second temperature interval.

Wherein the first set temperature interval is the outdoor ambient temperature T in Table 1_{Outer ring}Any set temperature interval in the temperature range of-20 ℃ to 60 ℃, such as a set temperature interval of-20 ℃ to 0 ℃, a set temperature interval of 0 ℃ to 20 ℃, a set temperature interval of 20 ℃ to 40 ℃, a set temperature interval of 40 ℃ to 60 ℃ and the like.

A second set temperature interval, e.g. the first exhaust pipe temperature T in Table 1_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}Any set temperature difference interval in the temperature difference range of 0 ℃ to 120 ℃ where the temperature difference Δ T exists, such as a set temperature difference interval of 0 ℃ to 20 ℃, a set temperature difference interval of 20 ℃ to 40 ℃, a set temperature difference interval of 40 ℃ to 60 ℃, a set temperature difference interval of 60 ℃ to 80 ℃, a set temperature difference interval of 80 ℃ to 100 ℃, a set temperature difference interval of 100 ℃ to 120 ℃, and the like.

For example: judging the operation stage of the compressor as the starting stage, and judging T_{Outer ring}、⊿T＝T_{Exhaust of gases}-T_{Outer ring}The section to which I belongs is selected according to table 1_{Start-up protection}、t_{Start-up detection}The value of (c). WhereinΔ T is the difference between the temperature of the compressor discharge pipe and the ambient temperature of the air-conditioning outdoor unit, I_{Start-up protection}Starting threshold current, t, set for the starting phase of the compressor_{Start-up detection}Is compressor current I_compGreater than or equal to I_{Start-up protection}The duration of detection of (1).

Table 1: compressor start-up phase

For example, if T_{Outer ring}In the temperature range of (-20, 0)]I.e. at-20 ℃ < T_{Outer ring}Not more than 0 ℃, and (delta T) is T_{Exhaust of gases}-T_{Outer ring}In the temperature difference region of (0, 20)]I.e. 0 ℃ < delta T ≦ 20 ℃, then I_{Start-up protection}Value of I₁，t_{Start-up detection}Value of t₁₀(ii) a Others I_{Start-up protection}、t_{Start-up detection}Values were selected according to table 1.

Wherein, I₁～I₄、t₁₀～t₁₅、t₂₀～t₂₄、t₃₀～t₃₃、t₄₀～t₄₂The sizes of the air conditioners and the compressors are generally selected according to different air conditioners and compressors. For example: the corresponding relationship may generally be: i is₁≥I₂≥I₃≥I₄，t₁₀≥t₁₁≥t₁₂≥t₁₃≥t₁₄≥t₁₅≥t₂₀≥t₂₁≥t₂₂≥t₂₃≥t₂₄≥t₃₀≥t₃₁≥t₃₂≥t₃₃≥t₄₀≥t₄₁≥t₄₂And can be obtained through a large number of experimental tests.

Therefore, under the condition that the compressor operates in the first setting stage, the current protection value and the current protection duration of the compressor in the first setting stage are determined according to the first temperature interval of the outdoor environment temperature in the first setting temperature range and the second temperature interval of the temperature difference between the first exhaust pipe temperature of the compressor and the outdoor environment temperature in the second setting temperature range, the most suitable current protection value and the most suitable current protection duration of the compressor in the first setting stage can be obtained, the compressor in the first setting stage can be protected according to the most suitable current protection value and the most suitable current protection duration of the compressor in the first setting stage, and the reliability and the safety of the protection of the compressor in the first setting stage can be guaranteed.

In step S230, if the first duration time of the compressor is greater than the first set time, it is determined that the compressor is operating in a second set stage, such as a stable stage of the compressor, and the current protection value and the current protection duration time of the compressor are determined in the second set stage.

For example: judging the stage of the compressor after operation, if the operation time is t_comp＞t_aThe compressor is operated in a stable phase. Wherein, t_aIn order to judge the time constant of the compressor at the stage after starting, the size of the time constant can be set to different values according to different air conditioners and compressors, and the optimal time is 1-5 seconds.

Therefore, whether the compressor is in the starting stage or the stable operation stage is determined according to the first continuous operation time after the air conditioner is started, and then the current protection value and the current protection duration of the compressor in different operation stages are selected according to different operation stages of the compressor, so that the most appropriate current protection value and current protection duration are selected when the compressor operates under different conditions, the compressor can be protected according to the most appropriate current protection value and current protection duration when the compressor operates under different conditions, the operation performance of the compressor is favorably improved, and the comfort experience of a user is improved.

More optionally, the specific process of determining the current protection value and the current protection duration of the compressor in the second setting stage in step S230 may further be described with reference to a flowchart of an embodiment of determining the current protection value and the current protection duration of the compressor in the second setting stage in the method of the present invention shown in fig. 4, and the specific process may include: step S410 to step S450.

In step S410, in the case that the compressor is operated in the second set stage, it is determined whether the first discharge pipe temperature of the compressor is greater than or equal to the first set discharge temperature, such as the first set discharge temperature may be the set second discharge temperature threshold T_{Exhaust gas 2}。

In step S420, if the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, a second continuous operation time when the first exhaust pipe temperature of the compressor is greater than or equal to the first set temperature is obtained, and a second exhaust pipe temperature of the compressor when the second continuous operation time is subtracted by the second set time is obtained, for example, the second exhaust pipe temperature may be T_{Exhaust gas 1}。

For example: judging whether the operation stage of the compressor is a stable stage or not, and judging whether T is met_{Exhaust of gases}≥T_{Exhaust gas 2}Is there a If yes, recording T_{Exhaust of gases}≥T_{Exhaust gas 2}Time t of time_compAnd record t_compT at the moment of- Δ T_{Exhaust of gases}Value of (A) T_{Exhaust gas 1}。

Wherein, T_{Exhaust gas 2}The set second exhaust temperature threshold value is selected according to different air conditioners and compressors and can be obtained through a large number of experimental tests. T is_{Exhaust gas 1}Is shown at t_compAt the moment Δ t, the first exhaust air temperature value detected in real time, Δ t being the standard time of the setting, different values may be set according to the actual situation.

Step S430 determines whether the temperature difference between the first set exhaust temperature and the second tailpipe temperature is greater than or equal to a second set exhaust temperature, e.g., the second set exhaust temperature may be a set compressor tailpipe temperature difference threshold Δ T_{Exhaust of gases}。

In step S440, if the temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to the second set exhaust temperature, a third temperature range in which the outdoor environment temperature is within the third set temperature range is determined.

Wherein a third set temperature range, such as the outdoor ambient temperature T in Table 2_{Outer ring}In the houseA set temperature range of 20 ℃ to 60 ℃. A third temperature interval, e.g. the outdoor ambient temperature T in Table 2_{Outer ring}The actual temperature range of the outdoor environment temperature of the air conditioner is within the set temperature range of-20 ℃ to 60 ℃.

Step S450, according to the third temperature interval, based on the third temperature interval and the second corresponding relationship between the second set current protection value and the second set current protection duration in the second set phase, determining the second set current protection value and the second set current protection duration in the second set phase corresponding to the third temperature interval in the second corresponding relationship, which is the same as the third temperature interval, as the second current protection value and the second current protection duration in the second set phase corresponding to the third temperature interval.

Wherein the third set temperature interval is, for example, the outdoor ambient temperature T in Table 2_{Outer ring}Any set temperature difference interval in the set temperature range of-20 ℃ to 60 ℃, such as a set temperature difference interval of-20 ℃ to-10 ℃, a set temperature difference interval of-10 ℃ to 0 ℃, a set temperature difference interval of 0 ℃ to 10 ℃, a set temperature difference interval of 10 ℃ to 20 ℃, a set temperature difference interval of 20 ℃ to 30 ℃, a set temperature difference interval of 30 ℃ to 40 ℃, a set temperature difference interval of 40 ℃ to 50 ℃, a set temperature difference interval of 50 ℃ to 60 ℃ and the like.

For example: under the condition that the operation stage of the compressor is a stable stage, further judging whether T is met_{Exhaust gas 2}-T_{Exhaust gas 1}≥⊿T_{Exhaust of gases}Is there a If yes, judging T_{Outer ring}In the section, selecting I according to Table 2_{Operation protection}、t_{Operation detection}The value of (c).

Wherein (delta T)_{Exhaust of gases}Different values can be set for the set temperature difference value threshold of the exhaust pipe of the compressor according to actual conditions. I is_{Operation protection}Steady operation current protection value, t, set for steady operation stage of compressor_{Operation detection}Is compressor current I_comp≥I_{Operation protection}The duration of detection of (1).

Table 2: stable operation stage of compressor

For example, if T_{Outer ring}In the temperature range of (-20, -10)]I.e. at-20 ℃ < T_{Outer ring}At the temperature of less than or equal to-10 ℃, then I_{Operation protection}Value of I₅，t_{Operation detection}Value of t₅(ii) a Others I_{Operation protection}、t_{Operation detection}Values were selected according to table 2.

Wherein, I₅～I₁₂，t₅～t₁₂The size of the air conditioner is generally selected according to different air conditioners and compressors. For example: the relationship may be generally I₅≥I₆≥I₇≥I₈≥I₉≥I₁₀≥I₁₁≥I₁₂，t₅≥t₆≥t₇≥t₈≥t₉≥t₁₀≥t₁₁≥t₁₂And can be obtained through a large number of experimental tests.

Therefore, under the condition that the compressor operates in the second setting stage, the current protection value and the current protection duration of the compressor in the second setting stage are selected according to the first exhaust pipe temperature of the compressor, the second continuous operation time that the first exhaust pipe temperature of the compressor is greater than or equal to the first setting temperature, and the second exhaust pipe temperature of the compressor when the second continuous operation time minus the second setting time, so that the most suitable current protection value and current protection duration of the compressor in the second setting stage can be obtained, the compressor in the second setting stage can be protected according to the most suitable current protection value and current protection duration of the compressor in the second setting stage, and the reliability and safety of protection of the compressor in the second setting stage can be guaranteed.

At step S130, the operation process of the compressor is protected according to the acquired operation current of the compressor, and the determined current protection value and current protection duration of the compressor.

For example: by utilizing the ambient temperature bulb of the outdoor unit of the air conditioner, the exhaust pipe temperature bulb of the compressor and the compressor current sensor, the control method of the over-current of the compressor is optimized under the condition of not increasing the cost, the compressor is stopped to work under the necessary condition, and the condition that the performance and the user experience of the air conditioner are influenced because the compressor enters the current protection too early is avoided. The optimized overcurrent control method can adapt to different working conditions, and the compressor enters overcurrent shutdown in advance before entering overload protection, so that the compressor is prevented from entering overload protection, the performance of the compressor is fully exerted, and the user experience effect is improved.

For example: after the air conditioner is started to operate, the outdoor environment temperature (namely, the outdoor unit environment temperature value) of the air conditioner is detected, the exhaust pipe temperature (namely, the compressor exhaust pipe temperature value) of a compressor of the air conditioner is detected, the operating current (namely, the compressor operating current value) of the compressor of the air conditioner is calculated, the obtained temperature value, the temperature difference value and the current value are compared with a specific value, if the set condition is met, the current protection value and the current protection duration time of the compressor are automatically adjusted, the compressor is enabled to operate under different conditions, the most appropriate current protection value and the current protection duration time are selected, the compressor can be prevented from entering overload protection, the compressor can be prevented from entering an overcurrent protection shutdown compressor too early, the operation stability and reliability of the air conditioner are improved, the comfort is further improved.

Therefore, the current protection value and the current protection duration of the compressor are determined according to the acquired outdoor environment temperature, the exhaust pipe temperature and the first continuous operation time of the compressor, the fixed-frequency compressor can operate under different conditions, the most appropriate current protection value and current protection time are selected, the compressor can be prevented from entering overload protection, the compressor can be prevented from entering the over-current protection shutdown compressor too early, the stability and the reliability of the operation of the air conditioner are improved, and the comfort and the user experience are improved.

Optionally, the specific process of protecting the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor in step S130 may include any one of the following control situations, for example, a first protection process of protecting the operation process of the compressor in a first setting stage, a second protection process of protecting the operation process of the compressor in a second setting stage, a first protection process of protecting the operation process of the compressor in the second setting stage, a second protection process of protecting the operation process of the compressor in the first setting stage, and the like may be included, and specific reference may be made to the following exemplary description.

The first protection process for protecting the operation process of the compressor in the first setting stage can be referred to as steps S201 to S205 shown in fig. 10. The second protection process for protecting the operation process of the compressor in the first setting stage may refer to steps S205 to S208 shown in fig. 10. The first protection process for protecting the operation process of the compressor in the second setting stage can be referred to steps S301 to S307 shown in fig. 10. The second protection process for protecting the operation process of the compressor in the second setting stage can be referred to steps S307 to S310 shown in fig. 10.

The first control scenario: in step S130, a specific process of protecting the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor may include: and a first protection process for protecting the operation process of the compressor in a first setting stage.

Referring to fig. 5, a flowchart of an embodiment of a first protection process for protecting an operation process of a compressor at a first setting stage in the method of the present invention is further described, where the specific process of the first protection process for protecting the operation process of the compressor at the first setting stage may include: step S510 to step S530.

In step S510, in the case that the compressor is operated at the first setting stage, it is determined whether the operation current of the compressor is greater than or equal to the first current protection value.

In step S520, if the operation current of the compressor is greater than or equal to the first current protection value, it is determined whether a third continuous operation time, in which the operation current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration.

Wherein the first current protection value, e.g. I_{Start-up protection}. A third continuous operation time, e.g. the operation current I of the compressor in case the compressor is operated in the start-up phase_compNot less than the first current protection value I_{Start-up protection}The continuous operating time Δ t1 of the compressor. First current protection duration, e.g. t_{Start-up detection}。

In step S530, if the third continuous operation time that the operation current of the compressor is greater than or equal to the first current protection value is greater than or equal to the first current protection duration, the compressor and the associated load shutdown protection of the compressor are controlled.

For example: under the condition that the compressor operates in the starting stage, judging whether I is met_comp≥I_{Start-up protection}And judging that the duration delta t1 is more than or equal to t_{Start-up detection}Is there a And if not, controlling the compressor to normally operate. And if so, controlling the compressor and the compressor associated load shutdown protection. Wherein Δ t1 represents I_comp≥I_{Start-up protection}The duration of the time.

Therefore, under the condition that the compressor operates in the first set stage, the current protection value and the current protection duration of the compressor are determined based on the first set stage, and the compressor in the first set stage is protected according to the operating current of the compressor and the third duration time that the operating current of the compressor is greater than or equal to the first current protection value, so that overload protection of the compressor can be avoided, the protection reference is accurate, and the protection reliability is high.

The second control scenario: in step S130, the operation process of the compressor is protected according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and the method may further include: and a second protection process for protecting the operation process of the compressor in the first setting stage.

Referring to fig. 6, a flowchart of an embodiment of a second protection process for protecting an operation process of a compressor at a first setting stage in the method of the present invention is further described, where the specific process of the second protection process for protecting an operation process of a compressor at a first setting stage may include: step S610 to step S630.

Step S610, if the compressor and the associated load shutdown protection of the compressor are controlled in the first setting stage, recording a first protection frequency of the compressor and the associated load shutdown protection of the compressor, and determining whether the first protection frequency of the compressor and the associated load shutdown protection of the compressor is greater than or equal to the first setting protection frequency in the first setting stage. Wherein the first number of times of protection, e.g. the number of times of protection X of the compressor₁. A first set number of protections, e.g. the number of protections M set during the start-up phase of the compressor₁。

For example: compressor and compressor associated load shutdown protection, compressor protection times X₁And increased by 1. Wherein M is₁The protection times set in the starting stage of the compressor, specifically the accumulated protection times in the starting stage of the compressor, can be set according to different air conditioners and compressors, and are preferably 2-10.

Step S620, if the first protection times of the compressor and the related load shutdown protection of the compressor are larger than or equal to the first set protection times in the first set stage, controlling the air conditioner to shutdown, initiating a first reminding message that the air conditioner has current faults in the first set stage, and clearing the recorded value of the first protection times.

For example: judging the protection times X of the compressor₁≥M₁Is satisfied? If the conditions are met, the condition that the whole air conditioner is stopped and cannot be recovered is determined, and a current fault code X is reported₁And (6) clearing. The fault code reminds the user or after-sales personnel that the air conditioner is abnormal. At this time, the air conditioner can be operated again after power failure and power on.

Step S630, if the first protection times of the shutdown protection of the compressor and the associated load of the compressor are less than the first protection times in the first setting stage, after a third setting time of the shutdown protection of the compressor and the associated load of the compressor, controlling the air conditioner to restart, and obtaining the outdoor environment temperature of the air conditioner again, and obtaining the first exhaust pipe temperature, the operating current, and the first continuous operating time of the compressor of the air conditioner.

For example: judging the protection times X of the compressor₁≥M₁Is satisfied? And if the condition is not met, the compressor and the associated load are stopped for N minutes, then the compressor and the associated load are started normally again, then the step of obtaining the outdoor environment temperature of the air conditioner and obtaining the first exhaust pipe temperature, the running current and the first continuous running time of the compressor of the air conditioner is returned to judge again. Wherein, N can set up different values as required, preferably 2 ~ 5.

Therefore, the air conditioner is subjected to overcurrent protection through the protection times of the compressor in the first setting stage, the condition that the compressor enters the overcurrent protection stop compressor too early can be avoided, the stability and the reliability of the operation of the air conditioner are improved, and the comfort experience of a user can be improved.

The third control scenario: in step S130, the operation process of the compressor is protected according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and the method may further include: and a first protection process for protecting the operation process of the compressor in the second setting stage.

Referring to fig. 7, a flowchart of an embodiment of a first protection process for protecting an operation process of a compressor at a second setting stage in the method of the present invention is further described, where the specific process of the first protection process for protecting the operation process of the compressor at the second setting stage may include: step S710 to step S730.

And step S710, under the condition that the compressor operates in the second setting stage, determining whether the operating current of the compressor is greater than or equal to a second current protection value.

Step S720, if the running current of the compressor is larger than or equal to the second current protection value, determining the voltageWhether the fourth continuous operation time that the operation current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection time and whether the first exhaust pipe temperature of the compressor is greater than or equal to a first set exhaust temperature, such as a set second exhaust temperature threshold T_{Exhaust gas 2}。

Step S730, if the fourth continuous operation time that the operation current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection duration and the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, controlling the compressor and the related load shutdown protection of the compressor.

For example: in the stable operation stage of the compressor, whether I is satisfied is judged_comp≥I_{Operation protection}And its duration delta t₂≥t_{Operation detection}And T is_{Exhaust of gases}≥T_{Exhaust gas 2}Is there a If not, returning to the step of determining whether the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature; and if so, controlling the compressor and the compressor associated load shutdown protection. Wherein, Δ t₂Is represented by_comp≥I_{Operation protection}The duration of (c).

Therefore, under the condition that the compressor operates in the second set stage, the current protection value and the current protection duration of the compressor are determined based on the second set stage, the compressor in the second set stage is protected according to the operating current of the compressor, the fourth duration time that the operating current of the compressor is greater than or equal to the second current protection value and the temperature of the first exhaust pipe of the compressor, overload protection of the compressor can be avoided, the protection reference is accurate, and the protection reliability is high.

The fourth control scenario: in step S130, the operation process of the compressor is protected according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and the method may further include: and a second protection process for protecting the operation process of the compressor in a second setting stage.

Referring to fig. 8, a flowchart of an embodiment of a second protection process for protecting an operation process of a compressor at a second setting stage in the method of the present invention is further described, where the specific process of the second protection process for protecting an operation process of a compressor at a second setting stage may include: step S810 to step S830.

Step S810, if the compressor and the associated load shutdown protection of the compressor are controlled in the second setting stage, recording a second protection number of the compressor and the associated load shutdown protection of the compressor, and determining whether the second protection number of the compressor and the associated load shutdown protection of the compressor is greater than or equal to the second setting protection number in the second setting stage. Wherein the second number of protections, e.g. the number X of compressor protections₂. A second set of guard times, e.g. M₂。

For example: compressor and compressor associated load shutdown protection, compressor protection times X₂And increased by 1.

Wherein M is₂The protection times set in the stable operation stage of the compressor, specifically the accumulated protection times in the stable operation stage of the compressor, can be set according to different air conditioners and compressors, and are preferably 2-10.

Step 820, if the second protection times of the compressor and the related load shutdown protection of the compressor are greater than or equal to the second set protection times in the first set stage, controlling the air conditioner to shutdown, initiating a second reminding message that the air conditioner has current faults in the second set stage, and clearing the recorded value of the second protection times.

For example: judging the protection times X of the compressor₂≥M₂Is satisfied? If the condition is met, the air conditioner is controlled to stop and cannot be recovered, and a current fault code X is reported₂And (6) clearing. The fault code reminds the user or after-sales personnel that the air conditioner is abnormal. At this time, the air conditioner can be operated again after power failure and power on.

Step S830, if the second protection times of the compressor and the associated load shutdown protection of the compressor are less than the second protection times in the second setting stage, after the fourth setting time of the compressor and the associated load shutdown protection of the compressor, controlling the air conditioner to restart, and obtaining the outdoor environment temperature of the air conditioner again, and obtaining the first exhaust pipe temperature, the operating current, and the first continuous operating time of the compressor of the air conditioner.

For example: judging the protection times X of the compressor₂≥M₂Is satisfied? And if the condition is not met, controlling the compressor and the associated load to stop for N minutes, then restarting normally, then returning to the step of acquiring the outdoor environment temperature of the air conditioner, and acquiring the first exhaust pipe temperature, the running current and the first continuous running time of the compressor of the air conditioner for re-judgment. Wherein, N can set up different values as required, preferably 2 ~ 5.

Therefore, the air conditioner is subjected to overcurrent protection through the protection times of the compressor in the second setting stage, the condition that the compressor enters the overcurrent protection stop compressor too early can be avoided, the stability and the reliability of the operation of the air conditioner can be improved, and the comfort experience of a user can be improved.

Through a large amount of tests, the technical scheme of the embodiment is adopted, the compressor overcurrent control method is optimized by utilizing the outdoor unit environment temperature bulb of the air conditioner, the exhaust pipe temperature bulb of the compressor and the compressor current detection circuit under the condition of not increasing the cost, so that the compressor is stopped working under the condition of actual overcurrent of the compressor, the phenomenon that the performance and the user experience of the air conditioner are influenced due to the fact that the compressor enters the current protection too early is avoided, the running performance of the compressor can be improved, and the user experience is improved.

According to an embodiment of the present invention, there is also provided an operation control apparatus corresponding to the operation control method. Referring to fig. 9, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The operation control device may include: an acquisition unit 102, a determination unit 104, and a control unit 106.

In an alternative example, the obtaining unit 102 may be configured to obtain an outdoor ambient temperature of the air conditioner after the air conditioner is powered on, and obtain a first discharge pipe temperature, an operating current and a first duration time of a compressor of the air conditioner. The specific functions and processes of the acquiring unit 102 are referred to in step S110.

Wherein the ambient outdoor temperature, e.g. ambient temperature T of outdoor unit of air conditioner_{Outer ring}. Temperature of first discharge pipe of compressor of air conditioner, e.g. temperature T of discharge pipe of compressor_{Exhaust of gases}. Operating current of compressor of air conditioner, e.g. operating current I of compressor_comp. First duration of operation of compressor of air conditioner, e.g. duration of operation t of compressor_compI.e. the duration t of the compressor taken after the compressor has started_comp。

In an alternative example, the determining unit 104 may be configured to determine the current protection value and the current protection duration of the compressor according to the acquired outdoor environment temperature, the discharge pipe temperature of the compressor, and the first duration time. The specific function and processing of the determination unit 104 are referred to in step S120.

Such as: the outdoor unit environment temperature detection circuit of the air conditioner can be used for converting a temperature signal of an outdoor unit environment temperature sensor into a data signal required by a detection control arithmetic unit. The temperature detection circuit of the compressor exhaust pipe of the air conditioner can be used for converting a temperature signal of the compressor exhaust pipe temperature sensor into a data signal required by the detection control arithmetic unit. The current sensor of the air conditioner can be used for converting the current signal of the current sensor of the compressor into a data signal required by the detection control arithmetic unit. The compressor control circuit of the air conditioner can be used for controlling the on and off of the compressor.

Alternatively, the determining unit 104 determines the current protection value and the current protection duration of the compressor, and may include:

the determination unit 104 may be further configured to determine whether the first duration time of the compressor is less than or equal to a first set time. Wherein, the first setting time is, for example, the time constant t of the stage after the compressor is started is judged_a. The specific function and processing of the determination unit 104 are also referred to in step S210.

The determining unit 104 may be further configured to determine that the compressor operates in a first setting stage, such as a starting stage of the compressor, and determine the current protection value and the current protection duration of the compressor in the first setting stage, if the first duration time of the compressor is less than or equal to the first setting time. The specific function and processing of the determination unit 104 are also referred to in step S220.

More optionally, the determining unit 104 determines the current protection value and the current protection duration of the compressor in the first setting stage, and may include:

the determining unit 104 may be further configured to determine a first temperature interval in which the outdoor environment temperature is within a first set temperature range and determine a second temperature interval in which a temperature difference between the first exhaust pipe temperature of the compressor and the outdoor environment temperature is within a second set temperature range when the compressor operates in the first set stage. The specific function and processing of the determination unit 104 are also referred to in step S300.

A second set temperature range, e.g. first exhaust pipe temperature T in Table 1_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}The temperature difference Δ T between them lies in a set temperature range of 0 ℃ to 120 ℃. Second temperature interval, e.g. first exhaust pipe temperature T in Table 1_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}In any set temperature difference zone within a set temperature difference range of 0 ℃ to 120 ℃ at which the temperature difference Δ T is located, the actually acquired first temperature difference zone of the air conditionerExhaust pipe temperature T_{Exhaust of gases}With outdoor ambient temperature T_{Outer ring}The temperature difference Δ T between them is in the actual temperature difference interval in which the set temperature range of-20 ℃ to 60 ℃ is situated.

The determining unit 104 may be further specifically configured to determine, according to the first temperature interval and the second temperature interval, based on the first temperature interval, the second temperature interval, and the first corresponding relationship between the first set current protection value and the first set current protection duration in the first set phase, the first set current protection value and the first set current protection duration in the first set phase corresponding to the first temperature interval and the second temperature interval in the first corresponding relationship as the first current protection value and the first current protection duration in the first set phase corresponding to the first temperature interval and the second temperature interval. The specific function and processing of the determination unit 104 are also referred to in step S320.

For example: judging the operation stage of the compressor as the starting stage, and judging T_{Outer ring}、⊿T＝T_{Exhaust of gases}-T_{Outer ring}The section to which I belongs is selected according to table 1_{Start-up protection}、t_{Start-up detection}Value of (A). Wherein, Δ T is a difference between a temperature of the exhaust pipe of the compressor and an ambient temperature of the outdoor unit of the air conditioner, I_{Start-up protection}Starting threshold current, t, set for the starting phase of the compressor_{Start-up detection}Is compressor current I_compGreater than or equal to I_{Start-up protection}The duration of detection of (1).

Table 1: compressor start-up phase

The determining unit 104 may be further configured to determine that the compressor operates in a second set phase, for example, a stable phase of the compressor, that is, a stable operation phase, if the first duration time of the compressor is greater than the first set time, and determine the current protection value and the current protection duration time of the compressor in the second set phase. The specific function and processing of the determination unit 104 are also referred to in step S230.

More optionally, the determining unit 104 determines the current protection value and the current protection duration of the compressor in the second setting stage, and may include:

the determination unit 104 may be specifically used when the compressor is operated at the secondIn the case of the set phase, it is determined whether the first discharge air pipe temperature of the compressor is greater than or equal to a first set discharge air temperature, which may be a set second discharge air temperature threshold T_{Exhaust gas 2}. The specific function and processing of the determination unit 104 are also referred to in step S410.

The determining unit 104 may be further configured to, if the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, obtain a second continuous operation time that the first exhaust pipe temperature of the compressor is greater than or equal to the first set temperature, and obtain a second exhaust pipe temperature of the compressor when the second continuous operation time is subtracted by the second set time, for example, the second exhaust pipe temperature may be T_{Exhaust gas 1}. The specific function and processing of the determination unit 104 are also referred to step S420.

The determination unit 104, in particular, may also be used for determining whether the temperature difference between the first set exhaust gas temperature and the second exhaust pipe temperature is greater than or equal to a second set exhaust gas temperature, e.g. the second set exhaust gas temperature may be the set compressor exhaust pipe temperature difference threshold Δ T_{Exhaust of gases}. The specific function and processing of the determination unit 104 are also referred to in step S430.

The determining unit 104 may be further configured to determine a third temperature interval in which the outdoor environment temperature is within a third set temperature range, if the temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to the second set exhaust temperature. The specific function and processing of the determination unit 104 are also referred to in step S440.

Wherein a third set temperature range, such as the outdoor ambient temperature T in Table 2_{Outer ring}The temperature is in a set temperature range of-20 ℃ to 60 ℃. A third temperature interval, e.g. the outdoor ambient temperature T in Table 2_{Outer ring}The actual temperature range of the outdoor environment temperature of the air conditioner is within the set temperature range of-20 ℃ to 60 ℃.

The determining unit 104 may be further specifically configured to determine, according to the third temperature interval, based on the third set temperature interval and a second corresponding relationship between the second set current protection value and the second set current protection duration in the second set phase, a second set current protection value and a second set current protection duration in the second set phase corresponding to a third set temperature interval that is the same as the third temperature interval in the second corresponding relationship, as the second current protection value and the second current protection duration in the second set phase corresponding to the third temperature interval. The specific function and processing of the determination unit 104 are also referred to in step S450.

Table 2: stable operation stage of compressor

In an alternative example, the control unit 106 may be configured to protect the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor. The specific function and processing of the control unit 106 are shown in step S130.

For example: by utilizing the ambient temperature bulb of the outdoor unit of the air conditioner, the exhaust pipe temperature bulb of the compressor and the compressor current sensor, the control device for the overcurrent of the compressor is optimized under the condition of not increasing the cost, the compressor is stopped to work under the necessary condition, and the condition that the performance and the user experience of the air conditioner are influenced by the condition that the compressor enters the current protection too early is avoided. This overcurrent's after optimizing controlling means can adapt to different operating mode conditions, before the compressor gets into overload protection, gets into the overcurrent in advance and shuts down, avoids the compressor to get into overload protection, and the performance of full play compressor improves user experience effect.

Alternatively, the specific process of protecting the operation process of the compressor by the control unit 106 according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor may include any one of the following control situations, for example, a first protection process of protecting the operation process of the compressor in a first setting stage, a second protection process of protecting the operation process of the compressor in a second setting stage, a first protection process of protecting the operation process of the compressor in the second setting stage, a second protection process of protecting the operation process of the compressor in the first setting stage, and the like may be included, and specific reference may be made to the following exemplary description.

The first control scenario: the controlling unit 106 protects the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and may include: the first protection process for protecting the operation process of the compressor at the first setting stage may specifically be as follows:

the control unit 106 may be further configured to determine whether the operating current of the compressor is greater than or equal to the first current protection value when the compressor operates in the first setting stage. The specific functions and processes of the control unit 106 are also referred to in step S510.

The control unit 106 may be further configured to determine whether a third duration time, during which the operating current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration time if the operating current of the compressor is greater than or equal to the first current protection value. The specific function and processing of the control unit 106 are also referred to in step S520.

The control unit 106 may be further configured to control the compressor and the associated load shutdown protection of the compressor if the third continuous operation time, in which the operation current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration. The specific functions and processes of the control unit 106 are also referred to in step S530.

For example: under the condition that the compressor operates in the starting stage, judging whether I is met_comp≥I_{Start-up protection}And judging that the duration delta t1 is more than or equal to t_{Start-up detection}Is there a If not, controlling the compressor to normally operate; and if so, controlling the compressor and the compressor associated load shutdown protection. Wherein Δ t1 represents I_comp≥I_{Start-up protection}The duration of the time.

The second control scenario: the controlling unit 106 protects the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and may further include: the second protection process for protecting the operation process of the compressor at the first setting stage may specifically be as follows:

the control unit 106 may be further configured to, if the compressor and the associated load shutdown protection of the compressor are controlled in the first setting stage, record the first protection times of the compressor and the associated load shutdown protection of the compressor, and determine whether the first protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the first setting protection times in the first setting stage. The specific functions and processes of the control unit 106 are also referred to in step S610. Wherein the first number of times of protection, e.g. the number of times of protection X of the compressor₁. A first set number of protections, e.g. the number of protections M set during the start-up phase of the compressor₁。

The control unit 106 may be further configured to control the air conditioner to shut down if the first protection times of the shutdown protection of the compressor and the associated load of the compressor are greater than or equal to the first set protection times in the first set stage, initiate a first warning message that the air conditioner has a current fault in the first set stage, and clear the record value of the first protection times. The specific functions and processes of the control unit 106 are also referred to in step S620.

For example: judging the protection times X of the compressor₁≥M₁Is satisfied? If the conditions are met, the condition that the whole air conditioner is stopped and cannot be recovered is determined, and a current fault code X is reported₁And (6) clearing. Fault code reminding user or after saleThe air conditioner of the personnel has abnormity. At this time, the air conditioner can be operated again after power failure and power on.

The control unit 106 may be further configured to, if the first protection times of the compressor and the associated load shutdown protection of the compressor are less than the first set protection times in the first set stage, control the air conditioner to restart after a third set time of the compressor and the associated load shutdown protection of the compressor, and obtain the outdoor environment temperature of the air conditioner again, and obtain the first exhaust pipe temperature, the operating current, and the first duration time of the compressor of the air conditioner. The specific function and processing of the control unit 106 are also referred to in step S630.

The third control scenario: the controlling unit 106 protects the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and may further include: the first protection process for protecting the operation process of the compressor at the second setting stage may specifically be as follows:

the control unit 106 may be further configured to determine whether the operating current of the compressor is greater than or equal to the second current protection value when the compressor operates in the second setting stage. The specific functions and processes of the control unit 106 are also referred to in step S710.

The control unit 106 may in particular also be used forIf the running current of the compressor is greater than or equal to the second current protection value, determining whether the fourth continuous running time that the running current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection duration, and determining whether the first exhaust pipe temperature of the compressor is greater than or equal to a first set exhaust temperature, for example, the first set exhaust temperature can be a set second exhaust temperature threshold T_{Exhaust gas 2}. The specific functions and processes of the control unit 106 are also referred to in step S720.

The control unit 106 may be further specifically configured to control the compressor and the related load shutdown protection of the compressor if the fourth continuous operation time when the operation current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection duration and the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature. The specific functions and processes of the control unit 106 are also referred to in step S730.

For example: in the stable operation stage of the compressor, whether I is satisfied is judged_comp≥I_{Operation protection}And its duration delta t₂≥t_{Operation detection}And T is_{Exhaust of gases}≥T_{Exhaust gas 2}Is there a If not, returning to the step of determining whether the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature. And if so, controlling the compressor and the compressor associated load shutdown protection. Wherein, Δ t₂Is represented by_comp≥I_{Operation protection}The duration of (c).

The fourth control scenario: the controlling unit 106 protects the operation process of the compressor according to the obtained operation current of the compressor, and the determined current protection value and current protection duration of the compressor, and may further include: the second protection process for protecting the operation process of the compressor at the second setting stage may specifically be as follows:

the control unit 106 may be further configured to, if the compressor and the associated load shutdown protection of the compressor are controlled in the second setting stage, record a second protection number of the compressor and the associated load shutdown protection of the compressor, and determine whether the second protection number of the compressor and the associated load shutdown protection of the compressor is greater than or equal to the second setting protection number in the second setting stage. The specific functions and processes of the control unit 106 are also referred to in step S810. Wherein the second number of protections, e.g. the number X of compressor protections₂. A second set of guard times, e.g. M₂。

The control unit 106 may be further specifically configured to control the air conditioner to shut down if the second protection times of the shutdown protection of the compressor and the associated load of the compressor are greater than or equal to the second set protection times in the first set stage, initiate a second warning message that the air conditioner has a current fault in the second set stage, and clear the recorded value of the second protection times. The specific function and processing of the control unit 106 are also referred to in step S820.

The control unit 106 may be further configured to, if the second protection times of the compressor and the associated load shutdown protection of the compressor are less than the second set protection times in the second set stage, control the air conditioner to restart after a fourth set time of the compressor and the associated load shutdown protection of the compressor, and obtain the outdoor environment temperature of the air conditioner again, and obtain the first exhaust pipe temperature, the operating current, and the first continuous operating time of the compressor of the air conditioner. The specific functions and processes of the control unit 106 are also referred to in step S830.

Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 8, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.

Through a large number of tests, the technical scheme of the invention optimizes the control method of the over-current of the compressor by utilizing the ambient temperature bulb of the outdoor unit of the air conditioner, the exhaust pipe temperature bulb of the compressor and the compressor current sensor under the condition of not increasing the cost so as to adapt to different working conditions, and the compressor enters into over-current shutdown in advance before entering into overload protection, thereby avoiding the compressor entering into overload protection, fully playing the performance of the compressor and improving the user experience effect.

According to an embodiment of the present invention, there is also provided an air conditioner corresponding to the operation control device. The air conditioner may include: the operation control device described above.

The compressor is the most important core part of the air conditioner, and is divided into two types, namely a variable frequency compressor and a fixed frequency compressor, according to the angle of the operating frequency. The fixed-frequency compressor cannot realize variable-frequency operation like the variable-frequency compressor, and once the fixed-frequency compressor is started, the fixed-frequency compressor runs at full speed, and under the severe working condition or overload working condition, the fixed-frequency compressor is often easily burnt due to overhigh power and serious heating. In order to prevent the fixed-frequency compressor from being burnt, an overload protector is usually arranged in the fixed-frequency compressor, and when the fixed-frequency compressor is too high in power and serious in heating, the overload protector is also synchronously overheated and is disconnected after reaching a certain temperature, so that the fixed-frequency compressor is protected, and the fixed-frequency compressor is prevented from being burnt.

The built-in overload protector of the fixed-frequency compressor generally has protection under two conditions: one is in the short time when the fixed-frequency compressor is just started, and the condition is that the overload protector is instantaneously overheated to enter protection due to the fact that the impact current of the fixed-frequency compressor in the starting stage is very large and the instantaneous impact large current; the other is that after the constant-frequency compressor operates stably for a period of time, the overload protector accumulates overheat and enters protection under certain heavy current. Once the fixed-frequency compressor enters overload protection, the fixed-frequency compressor cannot be recovered to operate within a short time, and generally needs more than 10 minutes, even more than half an hour or longer. The overload protection is started, the fixed-frequency compressor is stopped, the burning-out can be avoided, but the air conditioner can not refrigerate or heat at the moment, and the performance and the user experience of the air conditioner are greatly influenced, so the overload protection is generally only used as the last protection guarantee of the fixed-frequency compressor protection; on the other hand, if the compressor is frequently subjected to overload protection, the service life of the fixed-frequency compressor is also influenced, so that the overload protection is prevented from being introduced.

In an alternative embodiment, different air conditioner manufacturers have different control methods and implementation methods in consideration of overload protection control of the compressor, but few schemes are available which can achieve accurate control, are low in cost and have wide application range. The scheme of the invention provides a fixed-frequency compressor operation protection detection and control method, which can optimize the control method of compressor overcurrent under the condition of not increasing cost by utilizing an outdoor unit environment temperature bulb of an air conditioner and an exhaust pipe temperature bulb of a compressor, and stop the compressor to work under the necessary condition so as to avoid the influence on the performance and user experience of the air conditioner caused by the condition that the compressor enters current protection too early. The optimized over-current control method can adapt to different working conditions, and the compressor enters over-current shutdown in advance before entering overload protection, so that the compressor is prevented from entering overload protection, the performance of the compressor is fully exerted, and the user experience effect is improved.

In an optional example, in the solution of the present invention, after the air conditioner is started to operate, detecting an outdoor environment temperature of the air conditioner (i.e. an outdoor environment temperature value), an exhaust pipe temperature of a compressor of the air conditioner (i.e. a compressor exhaust pipe temperature value), an operating current of the compressor of the air conditioner (i.e. a compressor operating current value), and calculating a temperature difference value, comparing the obtained temperature value, temperature difference value, and current value with specific values, and if a set condition is satisfied, automatically adjusting a compressor current protection value and a current protection duration time to enable the compressor to operate under different conditions, selecting an optimal current protection value and current protection duration time, not only preventing the compressor from entering overload protection, but also preventing the compressor from entering overcurrent protection and stopping the compressor too early, therefore, the stability and the reliability of the operation of the air conditioner are improved, and the comfort and the user experience are improved.

In the scheme of the invention, the collection of the outdoor environment temperature and the exhaust temperature of the compressor can utilize some temperature sensors of the air conditioner, and the cost is not increased. Therefore, the shutdown protection before the compressor enters overload can be realized by using some hardware platforms without additionally increasing the cost under different conditions, and the precision is high.

In addition, in the scheme of the invention, the air conditioner can be provided with a compressor overload protector. The overload protector of the compressor has the effects that when the power of the compressor is too high and the compressor generates heat seriously, the overload protector is also overheated synchronously, and the power supply of the compressor is disconnected after the compressor reaches a certain temperature, so that the compressor is protected, and the compressor is prevented from being burnt.

Fig. 10 shows an implementation flow of the operation protection detection and control method for the fixed-frequency compressor according to the present invention.

And step S100, starting the air conditioner to operate.

Step S101, after the compressor is started, the ambient temperature T of the outdoor unit of the air conditioner is synchronously detected in real time_{Outer ring}Temperature T of compressor discharge pipe_{Exhaust of gases}Running current I of the compressor_compDuration of compressor operation time t_comp。

Step S102, judging the stage of the compressor after operation, if the continuous operation time t of the compressor is up_comp≦t_aIf yes, the compressor is operated in the starting stage, and step S201 is executed; if the duration t is running_comp＞t_aThen the compressor is operating in the stable stage and step S301 is executed.

Wherein, t_aIn order to judge the time constant of the compressor at the stage after starting, the size of the time constant can be set to different values according to different air conditioners and compressors, and the optimal time is 1-5 seconds.

Step S201, determining that the operation stage of the compressor is a start stage, and then executing step S202.

Step S202, judging T_{Outer ring}、⊿T＝T_{Exhaust of gases}-T_{Outer ring}The section to which I belongs is selected according to table 1_{Start-up protection}、t_{Start-up detection}The value of (c).

Wherein, Δ T is a difference between a temperature of the exhaust pipe of the compressor and an ambient temperature of the outdoor unit of the air conditioner, I_{Start-up protection}Starting threshold current, t, set for the starting phase of the compressor_{Start-up detection}Is compressor current I_compGreater than or equal to I_{Start-up protection}The duration of detection of (1).

Table 1: compressor start-up phase

Step S203, judging whether I is satisfied_comp≥I_{Start-up protection}And judging that the duration delta t1 is more than or equal to t_{Start-up detection}？

Wherein Δ t1 represents I_comp≥I_{Start-up protection}The duration of the time. If not, executing step S204; if yes, go to step S205.

And step S204, the compressor normally operates, and the step S102 is returned to judge again.

Step S205, compressor and compressor associated load shutdown protection, compressor protection times X₁Incremented by 1 and then step S206 is performed.

Wherein, X₁Is the accumulated protection times in the starting stage of the compressor.

Step S206, judging the protection times X of the compressor₁≥M₁Is satisfied? If the condition is not satisfied, execute step S207; if yes, go to step S208.

Wherein M is₁The protection times set in the starting stage of the compressor can be set according to the conditionsThe same air conditioner and compressor setting is preferably 2-10.

And step S207, after the compressor and the associated load are stopped for N minutes, the compressor and the associated load are started normally again, and then the operation returns to the step S101 for judgment again.

Wherein, N can set up different values as required, preferably 2 ~ 5.

Step S208, the air conditioner is stopped and can not be recovered, and a current fault code X is reported₁And (6) clearing. The fault code reminds the user or after-sales personnel that the air conditioner is abnormal. At this time, the air conditioner can be operated again after power failure and power on.

Step S301, determining that the operation stage of the compressor is a stable stage, and then executing step S302.

Step S302, judging whether T is satisfied_{Exhaust of gases}≥T_{Exhaust gas 2}Is there a If not, returning to the step S301; if yes, go to step S303.

Wherein, T_{Exhaust gas 2}The set second exhaust temperature threshold value is selected according to different air conditioners and compressors and can be obtained through a large number of experimental tests.

Step S303, recording T_{Exhaust of gases}≥T_{Exhaust gas 2}Time t of time_compAnd record t_compT at the moment of- Δ T_{Exhaust of gases}Value of (A) T_{Exhaust gas 1}. Wherein, T_{Exhaust gas 1}Is shown at t_compAt the moment Δ t, the first exhaust air temperature value detected in real time, Δ t being the standard time of the setting, different values may be set according to the actual situation.

Step S304, judging whether T is satisfied_{Exhaust gas 2}-T_{Exhaust gas 1}≥⊿T_{Exhaust of gases}Is there a If not, returning to execute the step S302; if yes, go to step S305.

Wherein (delta T)_{Exhaust of gases}Different values can be set for the set temperature difference value threshold of the exhaust pipe of the compressor according to actual conditions.

Step S305, judge T_{Outer ring}In the section, selecting I according to Table 2_{Operation protection}、t_{Operation detection}The value of (c).

Wherein, I_{Operation protection}Steady operation current protection value, t, set for steady operation stage of compressor_{Operation detection}Is compressor current I_comp≥I_{Operation protection}The duration of detection of (1).

Table 2: stable operation stage of compressor

Step S306, judging whether I is satisfied_comp≥I_{Operation protection}And its duration delta t₂≥t_{Operation detection}And T is_{Exhaust of gases}≥T_{Exhaust gas 2}Is there a If not, returning to execute the step S302; if yes, go to step S307;

wherein, Δ t₂Is represented by_comp≥I_{Operation protection}The duration of (c).

Step S307, compressor and compressor associated load shutdown protection, compressor protection times X₂Incremented by 1 and then step S308 is performed.

Wherein, X₂The accumulated protection times of the compressor in the stable operation stage are obtained.

Step S308, execute step S309; if yes, go to step S310.

Wherein M is₂The protection times set in the stable operation stage of the compressor can be set according to different air conditioners and compressors, and are preferably 2-10.

And step S309, after the compressor and the associated load are stopped for N minutes, the compressor and the associated load are started again normally, and then the process returns to the step S101 for judgment again.

Wherein, N can set up different values as required, preferably 2 ~ 5.

Step S310, the air conditioner is stopped and can not be recovered, and a current fault code X is reported₂And (6) clearing. The fault code reminds the user or after-sales personnel that the air conditioner is abnormal. At this time, the air conditioner can be operated again after power failure and power on.

Through the detection and control method, the fixed-frequency compressor can run under different conditions, the most appropriate current protection value and current protection time are selected, the compressor can be prevented from entering overload protection, the compressor can be prevented from entering over-current protection too early to stop the compressor, and therefore the running stability and reliability of the air conditioner are improved, the comfort is improved, and the user experience is improved.

It should be noted that, as shown in tables 1 and 2, the temperature interval, the temperature difference interval, the operating current protection value, the current protection duration, etc. may be divided more accurately or reduced according to different air conditioners and compressors, and are not limited to the values in tables 1 and 2.

As shown in fig. 11, a block diagram of a control device for implementing the operation protection detection and control method of the fixed-frequency compressor according to the present invention is shown.

The outdoor unit environment temperature sensor is used for detecting the environment temperature of the air conditioner outdoor unit. And the compressor exhaust pipe temperature sensor is used for detecting the exhaust pipe temperature of the compressor. And the compressor current sensor is used for detecting the current of the compressor. And the outdoor unit environment temperature detection circuit is used for converting the temperature signal of the outdoor unit environment temperature sensor into a data signal required by the detection control arithmetic unit. And the compressor exhaust pipe temperature detection circuit is used for converting the temperature signal of the compressor exhaust pipe temperature sensor into a data signal required by the detection control arithmetic unit. And the current sensor is used for converting the current signal of the compressor current sensor into a data signal required by the detection control arithmetic unit. And the compressor control circuit is used for controlling the start and stop of the compressor. The compressor is a core part for realizing the functions of refrigeration and heating for the air conditioner. And a display unit for displaying the temperature, operation state, fault code, etc. of the air conditioner.

The detection control operation unit is a main body for realizing the detection and control method, and is used for receiving data signals of an outdoor unit environment temperature detection circuit, a compressor exhaust pipe temperature detection circuit and a current sensor, judging, operating, judging and comparing the data signals, and finding out the most suitable current protection value and current protection duration of the compressor under different operation stages and conditions; the control circuit is used for comparing the running current of the compressor with the current protection value and the running current duration time and the current protection duration time which meet the conditions, thereby controlling the control circuit of the compressor and controlling the compressor to work or stop.

The scheme of the invention can utilize some hardware platforms without adding new hardware. In some schemes, only the current sensor and the compressor current sensor are used for overcurrent protection, and the temperature sampling of the compressor exhaust pipe and the outdoor environment temperature sampling are used for other control or protection and the like.

Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 9, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, and the current protection value and the current protection duration time of the compressor are automatically adjusted according to the environment temperature value of the outdoor unit, the temperature value of the exhaust pipe of the compressor and the running time of the compressor; and the compressor is protected according to the running current value of the compressor, the adjusted current protection value of the compressor and the current protection duration time, extra cost is not required to be added, shutdown protection is performed before the compressor is overloaded under different conditions, and the precision is high.

According to an embodiment of the present invention, there is also provided a storage medium corresponding to the operation control method. The storage medium may include: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the operation control method by the processor.

Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to 8, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, and the current protection value and the current protection duration time of the compressor are automatically adjusted according to the environment temperature value of the outdoor unit, the temperature value of the exhaust pipe of the compressor and the running time of the compressor; the compressor is protected according to the running current value of the compressor, the adjusted current protection value of the compressor and the adjusted current protection duration time of the compressor, the compressor is enabled to run under different conditions, the most appropriate current protection value and current protection duration time are selected, the compressor can be prevented from entering overload protection, the compressor can be prevented from entering over-current protection too early to stop the compressor, accordingly, the running stability and reliability of the air conditioner are improved, the comfort is improved, and the user experience is improved.

According to an embodiment of the present invention, there is also provided an air conditioner corresponding to the operation control method. The air conditioner may include: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded by the processor and execute the operation control method.

Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the methods shown in fig. 1 to 8, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the embodiments, which are not described herein.

Through a large number of tests, the technical scheme of the invention is adopted, and the current protection value and the current protection duration of the compressor are automatically adjusted by utilizing the outdoor environment temperature value of the air conditioner and the temperature value of the exhaust pipe of the compressor, such as utilizing the detection value of an outdoor unit environment temperature bulb of the air conditioner and the detection value of an exhaust pipe temperature bulb of the compressor; the compressor is protected according to the running current of the compressor, the adjusted current protection value and current protection time of the compressor, the compressor is enabled to run under different conditions, the most appropriate current protection value and current protection duration are selected to optimize a control method of compressor overcurrent, the compressor is stopped to work under the necessary condition, the phenomenon that the performance and user experience of the air conditioner are affected due to the fact that the compressor enters the current protection too early is avoided, the performance of the compressor is fully played, and the user experience effect is improved.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An operation control method characterized by comprising:

acquiring the outdoor environment temperature of the air conditioner, and acquiring the first exhaust pipe temperature, the running current and the first continuous running time of a compressor of the air conditioner;

according to the acquired outdoor environment temperature, the first exhaust pipe temperature and the first continuous operation time of the compressor, determining a current protection value and a current protection duration time of the compressor, comprising the following steps: determining whether a first duration time of the compressor is less than or equal to a first set time; if the first continuous operation time of the compressor is less than or equal to the first set time, determining that the compressor operates in a first set stage, and determining the current protection value and the current protection duration of the compressor in the first set stage; if the first continuous operation time of the compressor is longer than the first set time, determining that the compressor operates in a second set stage, and determining the current protection value and the current protection duration time of the compressor in the second set stage;

according to the acquired temperature of the first exhaust pipe of the compressor, the determined current protection value and the determined current protection duration of the compressor, the operation process of the compressor is protected, and the method comprises the following steps: determining whether an operation current of the compressor is greater than or equal to a first current protection value; if the operation current of the compressor is greater than or equal to the first current protection value, determining whether a third continuous operation time, in which the operation current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration; and if the third continuous operation time with the operation current of the compressor being larger than or equal to the first current protection value is larger than or equal to the first current protection duration, controlling the compressor and the related load shutdown protection of the compressor.

2. The method of claim 1, wherein determining the current protection value and the current protection duration of the compressor at the first set stage comprises:

determining a first temperature interval in which the outdoor environment temperature is within a first set temperature range, and determining a second temperature interval in which a temperature difference between the first exhaust pipe temperature of the compressor and the outdoor environment temperature is within a second set temperature range;

and determining a first set current protection value and a first set current protection duration time in the first set stage corresponding to a first set temperature interval which is the same as the first temperature interval and a second set temperature interval which is the same as the second temperature interval in the first corresponding relationship as the first current protection value and the first set current protection duration time in the first set stage corresponding to the first set temperature interval, the second set temperature interval and the first set current protection duration time in the first set stage corresponding to the first temperature interval and the second temperature interval based on the first set temperature interval, the second set temperature interval and the first corresponding relationship between the first set current protection value and the first set current protection duration time in the first set stage.

3. The method of claim 1, wherein determining the current protection value and the current protection duration of the compressor at the second set stage comprises:

determining whether a first discharge pipe temperature of the compressor is greater than or equal to a first set discharge temperature;

if the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, acquiring second continuous operation time when the first exhaust pipe temperature of the compressor is greater than or equal to the first set temperature, and acquiring second exhaust pipe temperature of the compressor when the second continuous operation time is subtracted by the second set time;

determining whether a temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to a second set exhaust temperature;

if the temperature difference between the first set exhaust temperature and the second exhaust pipe temperature is greater than or equal to the second set exhaust temperature, determining a third temperature interval in which the outdoor environment temperature is within a third set temperature range;

and determining a second set current protection value and a second set current protection duration time in a second set stage corresponding to a third set temperature interval which is the same as the third temperature interval in the second corresponding relationship as the second current protection value and the second current protection duration time in the second set stage corresponding to the third set temperature interval based on the third set temperature interval and a second corresponding relationship between the second set current protection value and the second set current protection duration time in the second set stage.

4. The method of claim 1, wherein protecting the operation of the compressor further comprises:

if the compressor and the associated load shutdown protection of the compressor are controlled in the first setting stage, recording first protection times of the compressor and the associated load shutdown protection of the compressor, and determining whether the first protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the first setting protection times in the first setting stage;

if the compressor and the first protection times of the shutdown protection of the associated load of the compressor are greater than or equal to the first set protection times in the first set stage, controlling the air conditioner to be shut down, initiating a first reminding message that the air conditioner has current faults in the first set stage, and resetting the recorded value of the first protection times;

and if the first protection times of the compressor and the related load shutdown protection of the compressor are less than the first set protection times in the first set stage, controlling the air conditioner to restart after the compressor and the related load shutdown protection of the compressor for a third set time.

5. The method of claim 1 or 3, wherein protecting the operation of the compressor further comprises:

determining whether an operation current of the compressor is greater than or equal to a second current protection value;

if the running current of the compressor is greater than or equal to the second current protection value, determining whether the fourth continuous running time of the running current of the compressor, which is greater than or equal to the second current protection value, is greater than or equal to the second current protection duration, and determining whether the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature;

and if the fourth continuous operation time that the operation current of the compressor is greater than or equal to the second current protection value is greater than or equal to the second current protection duration and the first exhaust pipe temperature of the compressor is greater than or equal to the first set exhaust temperature, controlling the compressor and the related load shutdown protection of the compressor.

6. The method of claim 5, wherein protecting the operation of the compressor further comprises:

if the compressor and the associated load shutdown protection of the compressor are controlled in the second setting stage, recording second protection times of the compressor and the associated load shutdown protection of the compressor, and determining whether the second protection times of the compressor and the associated load shutdown protection of the compressor are greater than or equal to the second setting protection times in the second setting stage;

if the second protection times of the compressor and the related load shutdown protection of the compressor are greater than or equal to the second set protection times in the first set stage, controlling the air conditioner to shutdown, initiating a second reminding message that the air conditioner has current faults in the second set stage, and resetting the recorded value of the second protection times;

and if the second protection times of the compressor and the related load shutdown protection of the compressor are less than the second set protection times in the second set stage, controlling the air conditioner to restart after the fourth set time of the compressor and the related load shutdown protection of the compressor.

7. An operation control device characterized by comprising:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the outdoor environment temperature of the air conditioner and acquiring the first exhaust pipe temperature, the running current and the first continuous running time of a compressor of the air conditioner;

the determining unit is used for determining a current protection value and a current protection duration of the compressor according to the acquired outdoor environment temperature, and a first exhaust pipe temperature and a first duration time of the compressor, and comprises: determining whether a first duration time of the compressor is less than or equal to a first set time; if the first continuous operation time of the compressor is less than or equal to the first set time, determining that the compressor operates in a first set stage, and determining the current protection value and the current protection duration of the compressor in the first set stage; if the first continuous operation time of the compressor is longer than the first set time, determining that the compressor operates in a second set stage, and determining the current protection value and the current protection duration time of the compressor in the second set stage;

the control unit is used for protecting the operation process of the compressor according to the acquired temperature of the first exhaust pipe of the compressor, the determined current protection value and the determined current protection duration of the compressor, and comprises the following steps: determining whether an operation current of the compressor is greater than or equal to a first current protection value; if the operation current of the compressor is greater than or equal to the first current protection value, determining whether a third continuous operation time, in which the operation current of the compressor is greater than or equal to the first current protection value, is greater than or equal to the first current protection duration; and if the third continuous operation time with the operation current of the compressor being larger than or equal to the first current protection value is larger than or equal to the first current protection duration, controlling the compressor and the related load shutdown protection of the compressor.

8. The apparatus of claim 7, wherein the determining unit determines the current protection value and the current protection duration of the compressor at a first setting stage, comprising:

9. The apparatus of claim 7, wherein the determining unit determines the current protection value and the current protection duration of the compressor at the second setting stage, comprising:

10. The apparatus of claim 7, wherein the control unit protects an operation process of the compressor, further comprising:

11. The apparatus of claim 7 or 9, wherein the control unit protects an operation process of the compressor, further comprising:

12. The apparatus of claim 11, wherein the control unit protects an operation process of the compressor, further comprising:

13. An air conditioner, comprising: the operation control device according to any one of claims 7 to 12;

or,

the method comprises the following steps:

a processor for executing a plurality of instructions;

a memory to store a plurality of instructions;

wherein the plurality of instructions are for being stored by the memory and loaded and executed by the processor to perform the operation control method of any one of claims 1 to 6.

14. A storage medium having a plurality of instructions stored therein; the plurality of instructions for being loaded by a processor and executing the operation control method according to any one of claims 1 to 6.