CN111023418B - Pressure sensor abnormity control method and device and air conditioner - Google Patents

Pressure sensor abnormity control method and device and air conditioner Download PDF

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Publication number
CN111023418B
CN111023418B CN201911363713.3A CN201911363713A CN111023418B CN 111023418 B CN111023418 B CN 111023418B CN 201911363713 A CN201911363713 A CN 201911363713A CN 111023418 B CN111023418 B CN 111023418B
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temperature
current
air conditioner
pressure value
liquid pipe
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CN111023418A (en
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陈华
刘合心
刘潘
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the invention provides a method and a device for controlling abnormity of a pressure sensor and an air conditioner, and relates to the technical field of air conditioners. The method for controlling the abnormality of the pressure sensor includes: acquiring an operation mode of an air conditioner; if the operation mode of the air conditioner is a refrigeration mode, acquiring the current temperature of an outdoor unit liquid pipe of the air conditioner; if the operation mode of the air conditioner is a heating mode, acquiring the current temperature of an indoor machine liquid pipe of the air conditioner; judging whether a pressure sensor of the air conditioner is abnormal or not; if the operation mode of the air conditioner is a refrigeration mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the outer liquid pipe; and if the operation mode of the air conditioner is a heating mode and the pressure sensor is abnormal, controlling the air conditioner to operate with faults according to the current temperature of the internal liquid pipe. According to the control method and device for the abnormity of the pressure sensor and the air conditioner, the air conditioner can operate with faults, so that the user experience is improved.

Description

Pressure sensor abnormity control method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling abnormity of a pressure sensor and an air conditioner.
Background
The pressure sensor is used as a core device of the air conditioner, the pressure sensor is used for collecting unit operation data, and if the pressure sensor is abnormal, the unit cannot normally operate.
Disclosure of Invention
The invention solves the problem that the air conditioner can not normally run due to the abnormity of the pressure sensor.
In order to solve the above problem, embodiments of the present invention provide a method and an apparatus for controlling an abnormality of a pressure sensor, and an air conditioner, which can switch pressure control to temperature control when the pressure sensor is abnormal, so that the air conditioner operates with a fault, thereby improving user experience.
In a first aspect, an embodiment provides a method for controlling an abnormality of a pressure sensor, for an air conditioner, the method including: acquiring an operation mode of the air conditioner; if the operation mode of the air conditioner is a refrigeration mode, acquiring the current temperature of an outdoor unit liquid pipe of the air conditioner; if the operation mode of the air conditioner is a heating mode, acquiring the current temperature of an indoor machine liquid pipe of the indoor machine of the air conditioner; judging whether a pressure sensor of the air conditioner is abnormal or not; if the operation mode of the air conditioner is a refrigeration mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the outer liquid pipe; and if the operation mode of the air conditioner is a heating mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the inner liquid pipe.
The embodiment of the invention provides a method for controlling the abnormity of a pressure sensor, which comprises the following steps: when the air conditioner is in a refrigeration mode, acquiring the current temperature of an outdoor machine liquid pipe of the air conditioner, and controlling the air conditioner to operate with faults according to the current temperature of the outdoor machine liquid pipe when a pressure sensor is abnormal; when the air conditioner is in a heating mode, the current temperature of the indoor machine liquid pipe of the air conditioner is obtained, and when the pressure sensor is abnormal, the air conditioner is controlled to operate with faults according to the current temperature of the indoor machine liquid pipe. That is to say, the embodiment of the invention can switch the pressure control to the temperature control when the pressure sensor is abnormal, so that the air conditioner can operate with a fault, thereby improving the user experience.
In an alternative embodiment, the step of controlling the air conditioner to operate with a fault according to the current outer liquid pipe temperature includes: calculating the actual temperature of the air conditioner in a refrigeration mode according to the supercooling degree of the outdoor unit of the air conditioner and the current temperature of the outdoor unit liquid pipe; and controlling the air conditioner according to the actual temperature of the air conditioner in the refrigeration mode.
In an alternative embodiment, the step of controlling the air conditioner according to the actual temperature of the air conditioner in the cooling mode includes: judging whether the actual temperature of the air conditioner in the refrigeration mode is greater than a first preset temperature or not; if the actual temperature of the air conditioner in the refrigeration mode is higher than the first preset temperature, controlling the air conditioner to operate at a reduced frequency; otherwise, controlling the air conditioner to run at a raised frequency.
In an alternative embodiment, the step of controlling the air conditioner to operate with a fault according to the current temperature of the inner liquid pipe comprises: calculating the actual temperature of the air conditioner in the heating mode according to the supercooling degree of the indoor unit of the air conditioner and the current temperature of the indoor unit liquid pipe; and controlling the air conditioner according to the actual temperature of the air conditioner in the heating mode.
In an alternative embodiment, the step of controlling the air conditioner according to the actual temperature of the air conditioner in the heating mode includes: judging whether the actual temperature of the air conditioner in the heating mode is greater than a second preset temperature or not; if the actual temperature of the air conditioner in the heating mode is higher than the second preset temperature, controlling the air conditioner to operate at a reduced frequency; otherwise, controlling the air conditioner to run at a raised frequency.
In an alternative embodiment, the step of determining whether the pressure sensor of the air conditioner is abnormal includes: if the operation mode of the air conditioner is a refrigeration mode, judging whether a pressure sensor of the air conditioner is abnormal or not according to the current temperature of the outer liquid pipe; and if the operation mode of the air conditioner is a heating mode, judging whether a pressure sensor of the air conditioner is abnormal according to the current temperature of the internal liquid pipe.
In an optional embodiment, the step of determining whether the pressure sensor of the air conditioner is abnormal according to the current temperature of the outer liquid pipe includes: acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the outer liquid pipe.
In an optional embodiment, the current pressure values include a first current pressure value and a second current pressure value, where the first current pressure value is obtained when the air conditioner is shut down for a first preset time, and the second current pressure value is obtained when the air conditioner is stably operated for a second preset time; the step of judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current outer liquid pipe temperature comprises the following steps of: judging whether the first current pressure value and the outdoor environment temperature meet a first preset condition or not according to the first current pressure value and the outdoor environment temperature corresponding to the first current pressure value; judging whether the second current pressure value and the current outer liquid pipe temperature meet a second preset condition or not according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value; and if the first current pressure value and the outdoor environment temperature meet the first preset condition, and the second current pressure value and the current outer liquid pipe temperature meet the second preset condition, judging that the pressure sensor is abnormal.
In an optional embodiment, the step of determining, according to the first current pressure value and the outdoor environment temperature corresponding to the first current pressure value, whether the first current pressure value and the outdoor environment temperature satisfy the first preset condition includes: calculating a first saturation temperature corresponding to the first current pressure value according to the first current pressure value; judging whether the first saturation temperature and the outdoor environment temperature are within a first preset error range or not; if the first saturation temperature and the outdoor environment temperature are within a first preset error range, judging that the first current pressure value and the outdoor environment temperature meet the first preset condition; otherwise, judging that the first current pressure value and the outdoor environment temperature do not meet the first preset condition.
In an optional embodiment, the step of determining whether the second current pressure value and the current outer liquid pipe temperature satisfy the second preset condition according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value includes: calculating a second saturation temperature corresponding to the second current pressure value according to the second current pressure value; judging whether the second saturation temperature is lower than the current temperature of the outer liquid pipe or not; if the second saturation temperature is lower than the current outer liquid pipe temperature, judging that the second current pressure value and the current outer liquid pipe temperature meet the second preset condition; otherwise, judging that the second current pressure value and the current temperature of the outer liquid pipe do not meet the second preset condition.
In an optional embodiment, the step of determining whether the pressure sensor of the air conditioner is abnormal according to the current temperature of the internal liquid pipe comprises: acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the internal liquid pipe.
In an optional embodiment, the current pressure values include a third current pressure value and a fourth current pressure value, where the third current pressure value is obtained when the air conditioner is shut down for a third preset time, and the fourth current pressure value is obtained when the air conditioner is stably operated for a fourth preset time; the step of judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current inner liquid pipe temperature comprises the following steps of: judging whether the third current pressure value and the outdoor environment temperature meet a third preset condition or not according to the third current pressure value and the outdoor environment temperature corresponding to the third current pressure value; judging whether the fourth current pressure value and the current inner liquid pipe temperature meet a fourth preset condition or not according to the fourth current pressure value and the current inner liquid pipe temperature corresponding to the fourth current pressure value; and if the third current pressure value and the outdoor environment temperature meet the third preset condition, and the fourth current pressure value and the current indoor liquid pipe temperature meet the fourth preset condition, judging that the pressure sensor is abnormal.
In an optional embodiment, the step of determining, according to the third current pressure value and the outdoor environment temperature corresponding to the third current pressure value, whether the third current pressure value and the outdoor environment temperature satisfy the third preset condition includes: calculating a third saturation temperature corresponding to the third current pressure value according to the third current pressure value; judging whether the third saturation temperature and the outdoor environment temperature are within a second preset error range or not; if the third saturation temperature and the outdoor environment temperature are within a second preset error range, determining that the third current pressure value and the outdoor environment temperature meet the third preset condition; otherwise, judging that the third current pressure value and the outdoor environment temperature do not meet the third preset condition.
In an optional embodiment, the step of determining, according to the fourth current pressure value and the current inner liquid pipe temperature corresponding to the fourth current pressure value, whether the fourth current pressure value and the current inner liquid pipe temperature satisfy the fourth preset condition includes: calculating a fourth saturation temperature corresponding to the fourth current pressure value according to the fourth current pressure value; judging whether the fourth saturation temperature is lower than the current temperature of the inner liquid inlet pipe or not; if the fourth saturation temperature is lower than the current inner liquid pipe temperature, judging that the fourth current pressure value and the current inner liquid pipe temperature meet the fourth preset condition; otherwise, judging that the fourth current pressure value and the current temperature of the internal liquid pipe do not meet the fourth preset condition.
In a second aspect, an embodiment provides a device for controlling an abnormality of a pressure sensor, for an air conditioner, the device including: a first obtaining module: the method comprises the steps of obtaining an operation mode of the air conditioner; a second obtaining module: the control device is used for acquiring the current temperature of an outdoor unit liquid pipe of the air conditioner if the operation mode of the air conditioner is a refrigeration mode; a third obtaining module: the temperature control device is used for acquiring the current temperature of an indoor machine liquid pipe of the air conditioner if the operation mode of the air conditioner is a heating mode; a judging module: the pressure sensor is used for judging whether the pressure sensor of the air conditioner is abnormal or not; a control module: the controller is used for controlling the air conditioner to operate in a fault mode according to the current temperature of the outer liquid pipe if the operation mode of the air conditioner is a refrigeration mode and the pressure sensor is abnormal; the control module is further configured to: and if the operation mode of the air conditioner is a heating mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the inner liquid pipe.
The pressure sensor abnormality control device according to the embodiment of the present invention: when the air conditioner is in a refrigeration mode, acquiring the current temperature of an outdoor machine liquid pipe of the air conditioner, and controlling the air conditioner to operate with faults according to the current temperature of the outdoor machine liquid pipe when a pressure sensor is abnormal; when the air conditioner is in a heating mode, the current temperature of the indoor machine liquid pipe of the air conditioner is obtained, and when the pressure sensor is abnormal, the air conditioner is controlled to operate with faults according to the current temperature of the indoor machine liquid pipe. That is to say, the embodiment of the invention can switch the pressure control to the temperature control when the pressure sensor is abnormal, so that the air conditioner can operate with a fault, thereby improving the user experience.
In an alternative embodiment, the control module is further configured to: calculating the actual temperature of the air conditioner in a refrigeration mode according to the supercooling degree of the outdoor unit of the air conditioner and the current temperature of the outdoor unit liquid pipe; and controlling the air conditioner according to the actual temperature of the air conditioner in the refrigeration mode.
In an alternative embodiment, the control module is further configured to: judging whether the actual temperature of the air conditioner in the refrigeration mode is greater than a first preset temperature or not; if the actual temperature of the air conditioner in the refrigeration mode is higher than the first preset temperature, controlling the air conditioner to operate at a reduced frequency; otherwise, controlling the air conditioner to run at a raised frequency.
In an alternative embodiment, the control module is further configured to: calculating the actual temperature of the air conditioner in the heating mode according to the supercooling degree of the indoor unit of the air conditioner and the current temperature of the indoor unit liquid pipe; and controlling the air conditioner according to the actual temperature of the air conditioner in the heating mode.
In an alternative embodiment, the control module is further configured to: judging whether the actual temperature of the air conditioner in the heating mode is greater than a second preset temperature or not; if the actual temperature of the air conditioner in the heating mode is higher than the second preset temperature, controlling the air conditioner to operate at a reduced frequency; otherwise, controlling the air conditioner to run at a raised frequency.
In an optional embodiment, the determining module is further configured to: if the operation mode of the air conditioner is a refrigeration mode, judging whether a pressure sensor of the air conditioner is abnormal or not according to the current temperature of the outer liquid pipe; and if the operation mode of the air conditioner is a heating mode, judging whether a pressure sensor of the air conditioner is abnormal according to the current temperature of the internal liquid pipe.
In an optional embodiment, the determining module is further configured to: acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the outer liquid pipe.
In an optional embodiment, the current pressure values include a first current pressure value and a second current pressure value, where the first current pressure value is obtained when the air conditioner is shut down for a first preset time, and the second current pressure value is obtained when the air conditioner is stably operated for a second preset time; the judging module is further configured to: judging whether the first current pressure value and the outdoor environment temperature meet a first preset condition or not according to the first current pressure value and the outdoor environment temperature corresponding to the first current pressure value; judging whether the second current pressure value and the current outer liquid pipe temperature meet a second preset condition or not according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value; and if the first current pressure value and the outdoor environment temperature meet the first preset condition, and the second current pressure value and the current outer liquid pipe temperature meet the second preset condition, judging that the pressure sensor is abnormal.
In an optional embodiment, the determining module is further configured to: calculating a first saturation temperature corresponding to the first current pressure value according to the first current pressure value; judging whether the first saturation temperature and the outdoor environment temperature are within a first preset error range or not; if the first saturation temperature and the outdoor environment temperature are within a first preset error range, judging that the first current pressure value and the outdoor environment temperature meet the first preset condition; otherwise, judging that the first current pressure value and the outdoor environment temperature do not meet the first preset condition.
In an optional embodiment, the determining module is further configured to: calculating a second saturation temperature corresponding to the second current pressure value according to the second current pressure value; judging whether the second saturation temperature is lower than the current temperature of the outer liquid pipe or not; if the second saturation temperature is lower than the current outer liquid pipe temperature, judging that the second current pressure value and the current outer liquid pipe temperature meet the second preset condition; otherwise, judging that the second current pressure value and the current temperature of the outer liquid pipe do not meet the second preset condition.
In an optional embodiment, the determining module is further configured to: acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the internal liquid pipe.
In an optional embodiment, the current pressure values include a third current pressure value and a fourth current pressure value, where the third current pressure value is obtained when the air conditioner is shut down for a third preset time, and the fourth current pressure value is obtained when the air conditioner is stably operated for a fourth preset time; the judging module is further configured to: judging whether the third current pressure value and the outdoor environment temperature meet a third preset condition or not according to the third current pressure value and the outdoor environment temperature corresponding to the third current pressure value; judging whether the fourth current pressure value and the current inner liquid pipe temperature meet a fourth preset condition or not according to the fourth current pressure value and the current inner liquid pipe temperature corresponding to the fourth current pressure value; and if the third current pressure value and the outdoor environment temperature meet the third preset condition, and the fourth current pressure value and the current indoor liquid pipe temperature meet the fourth preset condition, judging that the pressure sensor is abnormal.
In an optional embodiment, the determining module is further configured to: calculating a third saturation temperature corresponding to the third current pressure value according to the third current pressure value; judging whether the third saturation temperature and the outdoor environment temperature are within a second preset error range or not; if the third saturation temperature and the outdoor environment temperature are within a second preset error range, determining that the third current pressure value and the outdoor environment temperature meet the third preset condition; otherwise, judging that the third current pressure value and the outdoor environment temperature do not meet the third preset condition.
In an optional embodiment, the determining module is further configured to: calculating a fourth saturation temperature corresponding to the fourth current pressure value according to the fourth current pressure value; judging whether the fourth saturation temperature is lower than the current temperature of the inner liquid inlet pipe or not; if the fourth saturation temperature is lower than the current inner liquid pipe temperature, judging that the fourth current pressure value and the current inner liquid pipe temperature meet the fourth preset condition; otherwise, judging that the fourth current pressure value and the current temperature of the internal liquid pipe do not meet the fourth preset condition.
In a third aspect, an embodiment provides an air conditioner comprising a controller storing a control program for pressure sensor abnormality, the program, when executed, implementing the method according to any one of the preceding embodiments.
The air conditioner of the embodiment of the invention comprises: when the air conditioner is in a refrigeration mode, acquiring the current temperature of an outdoor machine liquid pipe of the air conditioner, and controlling the air conditioner to operate with faults according to the current temperature of the outdoor machine liquid pipe when a pressure sensor is abnormal; when the air conditioner is in a heating mode, the current temperature of the indoor machine liquid pipe of the air conditioner is obtained, and when the pressure sensor is abnormal, the air conditioner is controlled to operate with faults according to the current temperature of the indoor machine liquid pipe. That is to say, the embodiment of the invention can switch the pressure control to the temperature control when the pressure sensor is abnormal, so that the air conditioner can operate with a fault, thereby improving the user experience.
Drawings
FIG. 1 is a block diagram schematically illustrating the structure of an air conditioner according to the present invention;
FIG. 2 is a schematic block flow diagram of a method for controlling a pressure sensor fault according to the present invention;
FIG. 3 is a schematic flow chart of the substeps of substep S410 of step S400 of FIG. 2;
FIG. 4 is a schematic flow chart of substep S440 of FIG. 3;
FIG. 5 is a flowchart illustrating substep S441 in FIG. 4;
FIG. 6 is a schematic flow chart of substep S442 of FIG. 4;
FIG. 7 is a schematic flow chart of the substeps of substep S420 of step S400 of FIG. 2;
FIG. 8 is a schematic flow chart of substep S460 of FIG. 7;
FIG. 9 is a schematic flow chart of substep S461 of FIG. 8;
FIG. 10 is a schematic flow chart of substep S462 of FIG. 8;
FIG. 11 is a flowchart illustrating the sub-steps of step S500 in FIG. 2;
FIG. 12 is a schematic flow chart of the substeps of substep S520 of FIG. 11;
FIG. 13 is a flowchart illustrating the sub-steps of step S600 in FIG. 2;
FIG. 14 is a schematic flow chart of the substeps of substep S620 in FIG. 13;
fig. 15 is a block diagram schematically showing the structure of a control device for failure of the pressure sensor in fig. 1.
Icon: 100-an air conditioner; 10-control means of pressure sensor abnormality; 11-a first acquisition module; 12-a second acquisition module; 13-a third acquisition module; 14-a judgment module; 15-a control module; and 20, a controller.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, an embodiment of the present invention provides a method and a device 10 for controlling an abnormality of a pressure sensor, which are applied to an air conditioner 100, such as a multi-split air conditioner. The air conditioner 100 includes a controller 10 and a controller 20 for detecting an abnormality in a pressure sensor. The control device 10 for the pressure sensor abnormality includes at least one software function module which can be stored in the controller 20 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of a server. The controller 20 is used to execute executable modules stored therein, such as software functional modules and computer programs included in the control device 10 for controlling the abnormality of the pressure sensor.
The controller 20 may be an integrated circuit chip having signal processing capabilities. The controller 20 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor. The controller 20 may also be any conventional processor or the like.
The controller 20 is programmed with a control program for the pressure sensor abnormality, and when the controller 20 receives the execution command, the control program for the pressure sensor abnormality is executed.
Referring to fig. 2, a method for controlling an abnormality of a pressure sensor according to an embodiment of the present invention includes the following steps.
Step S100: the operation mode of the air conditioner 100 is acquired.
It should be understood that the operation mode of the air conditioner 100 may have at least two operation modes, i.e., a heating mode and a cooling mode, in which abnormality of the pressure sensor may occur, and the embodiment of the present invention can control the air conditioner 100 in consideration of the current operation mode of the air conditioner 100 when the pressure sensor is abnormal, so that the air conditioner 100 operates with a fault. Meanwhile, it should also be noted that the embodiment of the present invention is also applicable to the air conditioner 100 having only a single operation mode, such as the air conditioner 100 having only the cooling mode.
If the operation mode of the air conditioner 100 is the cooling mode, step S200 is executed: acquiring the current temperature of an outdoor unit liquid pipe of the air conditioner 100; if the operation mode of the air conditioner 100 is the heating mode, step S300 is executed: the current indoor fluid pipe temperature of the indoor fluid pipe of the air conditioner 100 is obtained.
It should be noted that, the above-mentioned step S200 and step S300 are alternatively executed, that is, when the operation mode of the air conditioner 100 is the cooling mode, the temperature of the outdoor unit liquid pipe is obtained, and the current outdoor unit liquid pipe temperature can be obtained through the outdoor unit liquid pipe temperature sensing bulb; when the operation mode of the air conditioner 100 is the heating mode, the temperature of the liquid pipe of the indoor unit is obtained, and the current temperature of the indoor unit can be obtained through the liquid pipe temperature sensing bulb of the indoor unit.
Step S400: it is determined whether the pressure sensor of the air conditioner 100 is abnormal.
It should be understood that the unit operation data collected by the pressure sensor is beneficial to controlling the normal operation of the unit, and the determination of whether the pressure sensor is abnormal may be performed in different manners according to different operation modes of the air conditioner 100, in an embodiment of the present invention, the step S400 may include a sub-step S410 and a sub-step S420, where if the operation mode of the air conditioner 100 is the cooling mode, the sub-step S410 is performed: judging whether a pressure sensor of the air conditioner 100 is abnormal according to the current temperature of the outer liquid pipe; if the operation mode of the air conditioner 100 is the heating mode, the step S420 is executed: whether the pressure sensor of the air conditioner 100 is abnormal is judged according to the current temperature of the indoor fluid pipe.
Referring to fig. 3, in the embodiment of the present invention, the sub-step S410 may include a sub-step S430: acquiring the outdoor environment temperature and the current pressure value of a pressure sensor; and, substep S440: and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the outer liquid pipe.
It should be understood that the outdoor environment temperature may be obtained by an outdoor environment thermal bulb, the current pressure value of the pressure sensor is obtained by the pressure sensor, and in step S440, whether the pressure sensor is abnormal may be determined by the saturation temperature corresponding to the current pressure value, the outdoor environment temperature, and the current outer liquid pipe temperature.
In an optional embodiment, the current pressure values may include a first current pressure value and a second current pressure value, where the first current pressure value is obtained when the air conditioner 100 is stopped for a first preset time, for example, the first current pressure value is obtained when the air conditioner 100 is stopped for 10 minutes; the second current pressure value is obtained when the air conditioner 100 is stably operated for a second preset time, for example, the second current pressure value is obtained when the air conditioner 100 is stably operated for 20 minutes.
It should be noted that the first preset time and the second preset time may be preset by a system, or may be set in a user-defined manner. The first preset time can be a value within 0-30 minutes, and the second preset time can be a value greater than zero, that is, any time during which the air conditioner 100 stably operates can be used.
Referring to fig. 4, the sub-step S440 may further include a sub-step S441, a sub-step S442, and a sub-step S443.
It should be noted that in the sub-step of the sub-step S440, the current pressure value detected by the pressure sensor is obtained at least twice, wherein one time is after a period of shutdown, and the other time is after a period of stable operation.
Substep S441: and judging whether the first current pressure value and the outdoor environment temperature meet a first preset condition or not according to the first current pressure value and the outdoor environment temperature corresponding to the first current pressure value.
It should be noted that, in the sub-step S441, the outdoor environment temperature is a temperature value of the outdoor environment corresponding to the first current pressure value time, and the obtaining time of the outdoor environment temperature are substantially consistent or do not exceed a preset time interval, for example, the obtaining time of the outdoor environment temperature and the obtaining time of the outdoor environment temperature do not exceed 1 minute.
Referring to fig. 5, the sub-step S441 may further include a sub-step S4411, a sub-step S4412, a sub-step S4413, and a sub-step S4414.
Substep S4411: and calculating a first saturation temperature corresponding to the first current pressure value according to the first current pressure value.
The pressure values measured by the pressure sensors correspond to saturation temperatures one by one, and the saturation temperatures are related to the types of the refrigerants. In the sub-step S4411, a first saturation temperature at the first current pressure value can be obtained through the corresponding relationship between the pressure value and the saturation temperature.
Substep S4412: and judging whether the first saturation temperature and the outdoor environment temperature are within a first preset error range.
It should be noted that, when the air conditioner is in a shutdown state and the system parameters are stable, the first saturation temperature corresponding to the first current pressure value measured by the pressure sensor should be approximately equal to the outdoor ambient temperature, that is, the first saturation temperature corresponding to the first current pressure value and the outdoor ambient temperature should be within a certain error range, and if the first saturation temperature and the outdoor ambient temperature exceed the first preset error range, it indicates that the first saturation temperature calculated by the first current pressure value does not match the actual temperature, that is, it indicates that the first current pressure value is incorrect.
If the first saturation temperature and the outdoor ambient temperature are within the first predetermined error range, the sub-step S4413 is executed: it is determined that the first current pressure value and the outdoor ambient temperature satisfy a first preset condition. Otherwise, perform substep S4414: and judging that the first current pressure value and the outdoor environment temperature do not meet a first preset condition.
That is to say, the first preset condition is whether the first saturation temperature and the outdoor environment temperature corresponding to the first current pressure value are within a first preset error range. If the error of the pressure sensor and the pressure sensor is within a first preset error range, the first preset condition is met, and the pressure sensor is not abnormal; otherwise, the first current pressure value and the outdoor ambient temperature do not satisfy the first preset condition, and the sub-step S442 needs to be continuously performed.
Substep S442: and judging whether the second current pressure value and the current outer liquid pipe temperature meet a second preset condition or not according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value.
It should be noted that, in the sub-step S442, the current outdoor liquid pipe temperature is the outdoor liquid pipe temperature corresponding to the second current pressure value time, and the obtaining time of the outdoor liquid pipe temperature are substantially the same or do not exceed a preset time interval, for example, the obtaining time of the outdoor liquid pipe temperature and the obtaining time of the outdoor liquid pipe temperature do not exceed 1 minute.
Referring to fig. 6, the substep S442 may further include substeps S4421, substep S4422, substep S4423 and substep S4424.
Substep S4421: and calculating a second saturation temperature corresponding to the second current pressure value according to the second current pressure value.
As mentioned above, the pressure values measured by the pressure sensors correspond to the saturation temperatures one by one, and in the sub-step S4421, the second saturation temperature at the second current pressure value can be obtained through the corresponding relationship between the pressure values and the saturation temperatures.
Substep S4422: and judging whether the second saturation temperature is lower than the current temperature of the outer liquid pipe.
If the second saturation temperature is less than the current outer liquid pipe temperature, the sub-step S4423 is executed: judging that the second current pressure value and the current temperature of the outer liquid pipe meet a second preset condition; otherwise, perform substep S4424: and judging that the second current pressure value and the current temperature of the outer liquid pipe do not meet a second preset condition.
After the sub-steps S441 and S442 are completed, the relationship between the first current pressure value and the outdoor environment temperature and the first preset condition, and the relationship between the second current pressure value and the current outdoor liquid pipe temperature and the second preset condition can be obtained. If the first current pressure value and the outdoor environment temperature satisfy the first preset condition, and the second current pressure value and the current outdoor liquid pipe temperature satisfy the second preset condition, the substep S443 is executed: it is determined that the pressure sensor is abnormal. Otherwise, it is determined that the pressure sensor is not abnormal.
The above-mentioned sub-step S410 is for judging whether the pressure sensor is abnormal in the cooling mode, and then, the step of judging whether the pressure sensor is abnormal in the heating mode will be described.
If the operation mode of the air conditioner 100 is the heating mode, the step S420 is executed: whether the pressure sensor of the air conditioner 100 is abnormal is judged according to the current temperature of the indoor fluid pipe.
Referring to fig. 7, in the embodiment of the present invention, the sub-step S420 may include a sub-step S450: acquiring the outdoor environment temperature and the current pressure value of a pressure sensor; and, substep S460: and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the internal liquid pipe.
In an optional embodiment, the current pressure values include a third current pressure value and a fourth current pressure value, where the third current pressure value is obtained when the air conditioner 100 is stopped for a third preset time, for example, the third current pressure value is obtained when the air conditioner 100 is stopped for 10 minutes; the fourth current pressure value is obtained when the air conditioner 100 is stably operated for a fourth preset time, for example, the fourth current pressure value is obtained when the air conditioner 100 is stably operated for 20 minutes.
It should be noted that the third preset time and the fourth preset time may be preset by a system, or may be set in a user-defined manner. The third preset time can be a value within 0-30 minutes, and the fourth preset time can be a value greater than zero, i.e., any time during which the air conditioner 100 is stably operated. The first preset time and the third preset time may be equal to or different from each other, and the second preset time and the fourth preset time may be equal to or different from each other, corresponding to the first preset time and the second preset time.
Referring to fig. 8, the sub-step S460 may further include a sub-step S461, a sub-step S462 and a sub-step S463.
It should be noted that in the sub-step of the sub-step S460, the current pressure value detected by the pressure sensor is obtained at least twice, wherein one time is after a period of shutdown, and the other time is after a period of stable operation.
Substep S461: and judging whether the third current pressure value and the outdoor environment temperature meet a third preset condition or not according to the third current pressure value and the outdoor environment temperature corresponding to the third current pressure value.
It should be noted that, in the sub-step S461, the outdoor environment temperature is a temperature value of the outdoor environment corresponding to the third current pressure value time, and the obtaining time of the outdoor environment temperature are substantially consistent or do not exceed a preset time interval, for example, the obtaining time of the outdoor environment temperature and the obtaining time of the outdoor environment temperature do not exceed 1 minute.
Referring to fig. 9, in an embodiment of the present invention, the sub-step S461 may include: substep S4611, substep S4612, substep S4613, and substep S4614.
Substep S4611: and calculating a third saturation temperature corresponding to the third current pressure value according to the third current pressure value.
As mentioned above, the pressure values measured by the pressure sensors correspond to the saturation temperatures one by one, and in the sub-step S4611, the third saturation temperature at the third current pressure value can be obtained through the corresponding relationship between the pressure values and the saturation temperatures.
Substep S4612: and judging whether the third saturation temperature and the outdoor environment temperature are within a second preset error range.
It should be noted that, when the air conditioner is in a shutdown state and the system parameters are stable, the third saturation temperature corresponding to the third current pressure value measured by the pressure sensor should be approximately equal to the outdoor environment temperature, that is, the third saturation temperature corresponding to the third current pressure value and the outdoor environment temperature should be within a certain error range, and if the third saturation temperature exceeds the second preset error range, it indicates that the third saturation temperature calculated by the third current pressure value does not meet the actual condition, that is, it indicates that the third current pressure value is incorrect.
If the third saturation temperature and the outdoor ambient temperature are within a second predetermined error range, the sub-step S4613 is performed: and judging that the third current pressure value and the outdoor environment temperature meet a third preset condition. Otherwise, sub-step S4614 is performed: and judging that the third current pressure value and the outdoor environment temperature do not meet a third preset condition.
That is, the third preset condition is whether the third saturation temperature and the outdoor environment temperature corresponding to the third current pressure value are within the second preset error range. If the error of the pressure sensor and the pressure sensor is within a second preset error range, the third preset condition is met, and the pressure sensor is not abnormal; otherwise, the third current pressure value and the outdoor ambient temperature do not satisfy the third preset condition, and the substep S462 needs to be continuously executed.
Substep S462: and judging whether the fourth current pressure value and the current inner liquid pipe temperature meet a fourth preset condition or not according to the fourth current pressure value and the current inner liquid pipe temperature corresponding to the fourth current pressure value.
It should be noted that, in the sub-step S462, the current temperature of the indoor fluid pipe is the temperature of the indoor fluid pipe corresponding to the fourth current pressure value time, and the obtaining time of the two is substantially consistent, or does not exceed a preset time interval, for example, the obtaining time of the two does not exceed 1 minute.
Referring to fig. 10, further, the sub-step S462 may include a sub-step S4621, a sub-step S4622, a sub-step S4623, and a sub-step S4624.
Substep S4621: and calculating a fourth saturation temperature corresponding to the fourth current pressure value according to the fourth current pressure value.
As mentioned above, the pressure values measured by the pressure sensors correspond to the saturation temperatures one by one, and in the sub-step S4621, the fourth saturation temperature at the fourth current pressure value can be obtained through the corresponding relationship between the pressure values and the saturation temperatures.
Substep S4622: and judging whether the fourth saturation temperature is lower than the current temperature of the inner liquid pipe.
If the fourth saturation temperature is less than the current inner liquid pipe temperature, performing substep S4623: judging that the fourth current pressure value and the current temperature of the inner liquid pipe meet a fourth preset condition; otherwise, perform sub-step S4624: and judging that the fourth current pressure value and the current temperature of the internal liquid pipe do not meet a fourth preset condition.
After the execution of the sub-steps S461 and S462 is finished, the relationship between the third current pressure value and the outdoor ambient temperature and the third preset condition, and the relationship between the fourth current pressure value and the current indoor liquid pipe temperature and the fourth preset condition can be obtained. If the third current pressure value and the outdoor environment temperature satisfy the third preset condition, and the fourth current pressure value and the current indoor fluid pipe temperature satisfy the fourth preset condition, the substep S463 is executed: it is determined that the pressure sensor is abnormal. Otherwise, it is determined that the pressure sensor is not abnormal.
In step S400, it is determined whether the pressure sensor is abnormal when the air conditioner 100 is in the cooling mode or the heating mode, and if the operation mode of the air conditioner 100 is the cooling mode and the pressure sensor is abnormal, step S500 is executed: controlling the air conditioner 100 to operate with a fault according to the current temperature of the outer liquid pipe; if the operation mode of the air conditioner 100 is the heating mode and the pressure sensor is abnormal, step S600 is executed: the air conditioner 100 is controlled to operate with a fault according to the current temperature of the internal liquid pipe.
In steps S500 and S600, when the pressure sensor is abnormal, the pressure control is converted into the temperature control, and the faulty operation of the pressure sensor and the air conditioner 100 in the cooling mode or the heating mode is respectively realized, so that the pressure value of the air conditioner 100 is maintained at a stable level, and the stable operation of the air conditioner 100 is ensured.
Referring to fig. 11, the step S500 may include a sub-step S510: calculating the actual temperature of the air conditioner 100 in the cooling mode according to the degree of supercooling of the outdoor unit of the air conditioner 100 and the current temperature of the outdoor unit liquid pipe; and, substep S520: the air conditioner 100 is controlled according to the actual temperature of the air conditioner 100 in the cooling mode.
It should be noted that the supercooling degree of the outdoor unit is a preset value, the supercooling degree corresponds to a saturation temperature, and the actual temperature in the refrigeration mode can be calculated through the sum of the saturation temperature corresponding to the supercooling degree and the current temperature of the outdoor unit liquid pipe. And controls the air conditioner 100 through the actual temperature, thereby implementing the conversion of the pressure control into the temperature control.
Referring to fig. 12, further, the sub-step S520 may include the sub-step S521: judging whether the actual temperature of the air conditioner 100 in the cooling mode is greater than a first preset temperature; if the actual temperature of the air conditioner 100 in the cooling mode is greater than the first predetermined temperature, the substep S522 is executed: controlling the air conditioner 100 to operate at a reduced frequency; otherwise, the sub-step S523 is performed: the air conditioner 100 is controlled to operate at a raised frequency. The first preset temperature may be set within a range of 20 ℃ to 40 ℃ (degree centigrade, centigrade), for example, the first preset temperature is set at 30 ℃.
It should be understood that, in the cooling mode, if the actual temperature is greater than the first preset temperature, it indicates that the temperature is higher at this time, and the corresponding pressure value is also greater, and the system pressure needs to be reduced by reducing the frequency; if the actual temperature is less than or equal to the first preset temperature, the frequency of the air conditioner 100 needs to be increased to enable the air conditioner 100 to operate normally and stably.
Referring to fig. 13, the step S600 of the air conditioner 100 with the malfunction operation in the heating mode may include the sub-step S610: calculating the actual temperature of the air conditioner 100 in the heating mode according to the supercooling degree of the indoor unit of the air conditioner 100 and the current temperature of the indoor unit liquid pipe; and, substep S620: the air conditioner 100 is controlled according to the actual temperature of the air conditioner 100 in the heating mode.
It should be noted that the supercooling degree of the indoor unit is a preset value, the supercooling degree corresponds to a saturation temperature, and the actual temperature in the heating mode can be calculated through the sum of the saturation temperature corresponding to the supercooling degree and the current temperature of the indoor unit liquid pipe. And controls the air conditioner 100 through the actual temperature, thereby implementing the conversion of the pressure control into the temperature control.
Referring to fig. 14, in an alternative embodiment, the step of controlling the air conditioner 100 according to the actual temperature of the air conditioner 100 in the heating mode includes: substep S621: judging whether the actual temperature of the air conditioner 100 in the heating mode is greater than a second preset temperature; if the actual temperature of the air conditioner 100 in the heating mode is greater than the second preset temperature, the sub-step S622 is executed: controlling the air conditioner 100 to operate at a reduced frequency; otherwise, perform substep S623: the air conditioner 100 is controlled to operate at a raised frequency. The second predetermined temperature may be in the range of 20 ℃ to 40 ℃, for example, the second predetermined temperature is 30 ℃.
It should be understood that, in the heating mode, if the actual temperature is greater than the second preset temperature, it indicates that the temperature is higher at this time, and the corresponding pressure value is also greater, and the system pressure needs to be reduced by a frequency reduction manner; if the actual temperature is less than or equal to the second preset temperature, the frequency of the air conditioner 100 needs to be increased to enable the air conditioner 100 to normally and stably operate.
The embodiment of the invention provides a method for controlling the abnormity of a pressure sensor, which comprises the following steps: when the air conditioner 100 is in a cooling mode, acquiring the current outer liquid pipe temperature of an outer liquid pipe of the air conditioner 100, and controlling the air conditioner 100 to operate with a fault according to the current outer liquid pipe temperature when the pressure sensor is abnormal; when the air conditioner 100 is in a heating mode, the current temperature of an indoor liquid pipe of the air conditioner 100 is obtained, and when the pressure sensor is abnormal, the fault operation of the air conditioner 100 is controlled according to the current temperature of the indoor liquid pipe. That is, the embodiment of the present invention can switch the pressure control to the temperature control when the pressure sensor is abnormal, so that the air conditioner 100 operates with a fault, thereby improving the user experience.
Referring to fig. 15, an embodiment of the invention provides a device 10 for controlling a pressure sensor abnormality, which includes a first obtaining module 11, a second obtaining module 12, a third obtaining module 13, a determining module 14, and a control module 15.
The first acquisition module 11: for obtaining the operation mode of the air conditioner 100.
In the embodiment of the present invention, the step S100 is executed by the first obtaining module 11.
The second acquisition module 12: the method is used for acquiring the current temperature of the outdoor unit liquid pipe of the air conditioner 100 if the operation mode of the air conditioner 100 is the cooling mode.
In the embodiment of the present invention, the step S200 is executed by the second obtaining module 12.
The third obtaining module 13: the method is used for acquiring the current temperature of the indoor unit liquid pipe of the indoor unit of the air conditioner 100 if the operation mode of the air conditioner 100 is the heating mode.
In the embodiment of the present invention, the step S300 is executed by the third obtaining module 13.
The judging module 14: for determining whether the pressure sensor of the air conditioner 100 is abnormal.
In the embodiment of the present invention, the step S400 is executed by the determining module 14.
The control module 15: and the controller is used for controlling the air conditioner 100 to operate with a fault according to the current temperature of the outer liquid pipe if the operation mode of the air conditioner 100 is the cooling mode and the pressure sensor is abnormal.
In the embodiment of the present invention, the step S500 is executed by the control module 15.
The control module 15 is also configured to: if the operation mode of the air conditioner 100 is the heating mode and the pressure sensor is abnormal, the air conditioner 100 is controlled to operate with a fault according to the current temperature of the indoor fluid pipe.
In the embodiment of the present invention, the step S600 is executed by the control module 15.
In an alternative embodiment, the control module 15 is further configured to: and calculating the actual temperature of the air conditioner 100 in the cooling mode according to the supercooling degree of the outdoor unit of the air conditioner 100 and the current temperature of the outdoor unit liquid pipe. The air conditioner 100 is controlled according to the actual temperature of the air conditioner 100 in the cooling mode.
In the embodiment of the present invention, the sub-step S510 and the sub-step S520 are performed by the control module 15.
In an alternative embodiment, the control module 15 is further configured to: it is determined whether the actual temperature of the air conditioner 100 in the cooling mode is greater than a first preset temperature. And if the actual temperature of the air conditioner 100 in the cooling mode is higher than the first preset temperature, controlling the air conditioner 100 to operate at a reduced frequency. Otherwise, the air conditioner 100 is controlled to operate at a raised frequency.
In the embodiment of the present invention, the sub-step S521, the sub-step S522, and the sub-step S523 described above are executed by the control module 15.
In an alternative embodiment, the control module 15 is further configured to: and calculating the actual temperature of the air conditioner 100 in the heating mode according to the supercooling degree of the indoor unit of the air conditioner 100 and the current temperature of the indoor unit liquid pipe. The air conditioner 100 is controlled according to the actual temperature of the air conditioner 100 in the heating mode.
In the embodiment of the present invention, the sub-step S610 and the sub-step S620 described above are executed by the control module 15.
In an alternative embodiment, the control module 15 is further configured to: it is determined whether the actual temperature of the air conditioner 100 in the heating mode is greater than a second preset temperature. And if the actual temperature of the air conditioner 100 in the heating mode is higher than the second preset temperature, controlling the air conditioner 100 to reduce the frequency to operate. Otherwise, the air conditioner 100 is controlled to operate at a raised frequency.
In the embodiment of the present invention, the sub-step S621, the sub-step S622, and the sub-step S623 described above are performed by the control module 15.
In an alternative embodiment, the determining module 14 is further configured to: if the operation mode of the air conditioner 100 is the cooling mode, whether the pressure sensor of the air conditioner 100 is abnormal is determined according to the current temperature of the outer liquid pipe. If the operation mode of the air conditioner 100 is the heating mode, whether the pressure sensor of the air conditioner 100 is abnormal is judged according to the current temperature of the indoor fluid pipe.
In the embodiment of the present invention, the above sub-step S410 and sub-step S420 are executed by the determining module 14.
In an alternative embodiment, the determining module 14 is further configured to: and acquiring the outdoor ambient temperature and the current pressure value of the pressure sensor. And judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the outer liquid pipe.
In the embodiment of the present invention, the above sub-step S430 and the sub-step S440 are executed by the determining module 14.
In an optional embodiment, the current pressure values include a first current pressure value and a second current pressure value, where the first current pressure value is obtained when the air conditioner 100 is stopped for a first preset time, and the second current pressure value is obtained when the air conditioner 100 is stably operated for a second preset time. The determining module 14 is further configured to: and judging whether the first current pressure value and the outdoor environment temperature meet a first preset condition or not according to the first current pressure value and the outdoor environment temperature corresponding to the first current pressure value. And judging whether the second current pressure value and the current outer liquid pipe temperature meet a second preset condition or not according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value. And if the first current pressure value and the outdoor environment temperature meet the first preset condition, and the second current pressure value and the current temperature of the outdoor liquid pipe meet the second preset condition, judging that the pressure sensor is abnormal.
In the embodiment of the present invention, the sub-steps S441, S442, and S443 described above are executed by the determining module 14.
In an alternative embodiment, the determining module 14 is further configured to: and calculating a first saturation temperature corresponding to the first current pressure value according to the first current pressure value. And judging whether the first saturation temperature and the outdoor environment temperature are within a first preset error range. And if the first saturation temperature and the outdoor environment temperature are within a first preset error range, judging that the first current pressure value and the outdoor environment temperature meet a first preset condition. Otherwise, judging that the first current pressure value and the outdoor environment temperature do not meet the first preset condition.
In the embodiment of the present invention, the sub-steps S4411, S4412, S4413 and S4414 are performed by the determining module 14.
In an alternative embodiment, the determining module 14 is further configured to: and calculating a second saturation temperature corresponding to the second current pressure value according to the second current pressure value. And judging whether the second saturation temperature is lower than the current temperature of the outer liquid pipe. And if the second saturation temperature is lower than the current temperature of the outer liquid pipe, judging that the second current pressure value and the current temperature of the outer liquid pipe meet a second preset condition. Otherwise, judging that the second current pressure value and the current temperature of the outer liquid pipe do not meet the second preset condition.
In the embodiment of the present invention, the sub-steps S4421, S4422, S4423 and S4424 are performed by the determining module 14.
In an alternative embodiment, the determining module 14 is further configured to: and acquiring the outdoor ambient temperature and the current pressure value of the pressure sensor. And judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the internal liquid pipe.
In the embodiment of the present invention, the above sub-steps S450 and S460 are executed by the determining module 14.
In an optional embodiment, the current pressure values include a third current pressure value and a fourth current pressure value, where the third current pressure value is obtained when the air conditioner 100 is stopped for a third preset time, and the fourth current pressure value is obtained when the air conditioner 100 is stably operated for a fourth preset time. The determining module 14 is further configured to: and judging whether the third current pressure value and the outdoor environment temperature meet a third preset condition or not according to the third current pressure value and the outdoor environment temperature corresponding to the third current pressure value. And judging whether the fourth current pressure value and the current inner liquid pipe temperature meet a fourth preset condition or not according to the fourth current pressure value and the current inner liquid pipe temperature corresponding to the fourth current pressure value. And if the third current pressure value and the outdoor environment temperature meet the third preset condition and the fourth current pressure value and the current indoor liquid pipe temperature meet the fourth preset condition, judging that the pressure sensor is abnormal.
In the embodiment of the present invention, the sub-steps S461, S462 and S463 are performed by the determining module 14.
In an alternative embodiment, the determining module 14 is further configured to: and calculating a third saturation temperature corresponding to the third current pressure value according to the third current pressure value. And judging whether the third saturation temperature and the outdoor environment temperature are within a second preset error range. And if the third saturation temperature and the outdoor environment temperature are within a second preset error range, judging that the third current pressure value and the outdoor environment temperature meet a third preset condition. Otherwise, judging that the third current pressure value and the outdoor environment temperature do not meet the third preset condition.
In the embodiment of the present invention, the sub-step S4611, the sub-step S4612, the sub-step S4613, and the sub-step S4614 are performed by the determining module 14.
In an alternative embodiment, the determining module 14 is further configured to: and calculating a fourth saturation temperature corresponding to the fourth current pressure value according to the fourth current pressure value. And judging whether the fourth saturation temperature is lower than the current temperature of the inner liquid pipe. And if the fourth saturation temperature is lower than the current temperature of the inner liquid pipe, judging that the fourth current pressure value and the current temperature of the inner liquid pipe meet a fourth preset condition. Otherwise, judging that the fourth current pressure value and the current temperature of the inner liquid pipe do not meet the fourth preset condition.
In the embodiment of the present invention, the sub-step S4621, the sub-step S4622, the sub-step S4623, and the sub-step S4624 described above are performed by the determining module 14.
The control device 10 for abnormality of a pressure sensor according to the embodiment of the present invention: when the air conditioner 100 is in a cooling mode, acquiring the current outer liquid pipe temperature of an outer liquid pipe of the air conditioner 100, and controlling the air conditioner 100 to operate with a fault according to the current outer liquid pipe temperature when the pressure sensor is abnormal; when the air conditioner 100 is in a heating mode, the current temperature of an indoor liquid pipe of the air conditioner 100 is obtained, and when the pressure sensor is abnormal, the fault operation of the air conditioner 100 is controlled according to the current temperature of the indoor liquid pipe. That is, the embodiment of the present invention can switch the pressure control to the temperature control when the pressure sensor is abnormal, so that the air conditioner 100 operates with a fault, thereby improving the user experience.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (13)

1. A method for controlling abnormality of a pressure sensor for an air conditioner, the method comprising:
acquiring an operation mode of the air conditioner;
if the operation mode of the air conditioner is a refrigeration mode, acquiring the current temperature of an outdoor unit liquid pipe of the air conditioner;
if the operation mode of the air conditioner is a heating mode, acquiring the current temperature of an indoor machine liquid pipe of the indoor machine of the air conditioner;
judging whether a pressure sensor of the air conditioner is abnormal or not;
if the operation mode of the air conditioner is a refrigeration mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the outer liquid pipe;
if the operation mode of the air conditioner is a heating mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the inner liquid pipe;
the step of judging whether the pressure sensor of the air conditioner is abnormal includes: if the operation mode of the air conditioner is a refrigeration mode, judging whether a pressure sensor of the air conditioner is abnormal or not according to the current temperature of the outer liquid pipe; the step of judging whether the pressure sensor of the air conditioner is abnormal or not according to the current temperature of the outer liquid pipe comprises the following steps: acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the outer liquid pipe;
if the operation mode of the air conditioner is a heating mode, judging whether a pressure sensor of the air conditioner is abnormal or not according to the current temperature of the internal liquid pipe; the step of judging whether the pressure sensor of the air conditioner is abnormal or not according to the current temperature of the internal liquid pipe comprises the following steps: acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the internal liquid pipe.
2. The method of claim 1, wherein the step of controlling the air conditioner to operate with a fault according to the current outer liquid pipe temperature comprises:
calculating the actual temperature of the air conditioner in a refrigeration mode according to the supercooling degree of the outdoor unit of the air conditioner and the current temperature of the outdoor unit liquid pipe;
and controlling the air conditioner according to the actual temperature of the air conditioner in the refrigeration mode.
3. The method of claim 2, wherein the step of controlling the air conditioner according to the actual temperature of the air conditioner in the cooling mode comprises:
judging whether the actual temperature of the air conditioner in the refrigeration mode is greater than a first preset temperature or not;
if the actual temperature of the air conditioner in the refrigeration mode is higher than the first preset temperature, controlling the air conditioner to operate at a reduced frequency;
otherwise, controlling the air conditioner to run at a raised frequency.
4. The method of claim 1, wherein the step of controlling the air conditioner with malfunction according to the current indoor fluid pipe temperature comprises:
calculating the actual temperature of the air conditioner in the heating mode according to the supercooling degree of the indoor unit of the air conditioner and the current temperature of the indoor unit liquid pipe;
and controlling the air conditioner according to the actual temperature of the air conditioner in the heating mode.
5. The method of claim 4, wherein the step of controlling the air conditioner according to the actual temperature of the air conditioner in the heating mode comprises:
judging whether the actual temperature of the air conditioner in the heating mode is greater than a second preset temperature or not;
if the actual temperature of the air conditioner in the heating mode is higher than the second preset temperature, controlling the air conditioner to operate at a reduced frequency;
otherwise, controlling the air conditioner to run at a raised frequency.
6. The method according to claim 1, wherein the current pressure values include a first current pressure value and a second current pressure value, wherein the first current pressure value is obtained when the air conditioner is shut down for a first preset time, and the second current pressure value is obtained when the air conditioner is stably operated for a second preset time;
the step of judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current outer liquid pipe temperature comprises the following steps of:
judging whether the first current pressure value and the outdoor environment temperature meet a first preset condition or not according to the first current pressure value and the outdoor environment temperature corresponding to the first current pressure value;
judging whether the second current pressure value and the current outer liquid pipe temperature meet a second preset condition or not according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value;
and if the first current pressure value and the outdoor environment temperature meet the first preset condition, and the second current pressure value and the current outer liquid pipe temperature meet the second preset condition, judging that the pressure sensor is abnormal.
7. The method of claim 6, wherein the step of determining whether the first current pressure value and the outdoor ambient temperature satisfy the first preset condition according to the first current pressure value and the outdoor ambient temperature corresponding to the first current pressure value comprises:
calculating a first saturation temperature corresponding to the first current pressure value according to the first current pressure value;
judging whether the first saturation temperature and the outdoor environment temperature are within a first preset error range or not;
if the first saturation temperature and the outdoor environment temperature are within a first preset error range, judging that the first current pressure value and the outdoor environment temperature meet the first preset condition;
otherwise, judging that the first current pressure value and the outdoor environment temperature do not meet the first preset condition.
8. The method according to claim 6, wherein the step of determining whether the second current pressure value and the current outer liquid pipe temperature satisfy the second preset condition according to the second current pressure value and the current outer liquid pipe temperature corresponding to the second current pressure value includes:
calculating a second saturation temperature corresponding to the second current pressure value according to the second current pressure value;
judging whether the second saturation temperature is lower than the current temperature of the outer liquid pipe or not;
if the second saturation temperature is lower than the current outer liquid pipe temperature, judging that the second current pressure value and the current outer liquid pipe temperature meet the second preset condition; otherwise, judging that the second current pressure value and the current temperature of the outer liquid pipe do not meet the second preset condition.
9. The method according to claim 1, wherein the current pressure values include a third current pressure value and a fourth current pressure value, wherein the third current pressure value is obtained when the air conditioner is shut down for a third preset time, and the fourth current pressure value is obtained when the air conditioner is stably operated for a fourth preset time;
the step of judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current inner liquid pipe temperature comprises the following steps of:
judging whether the third current pressure value and the outdoor environment temperature meet a third preset condition or not according to the third current pressure value and the outdoor environment temperature corresponding to the third current pressure value;
judging whether the fourth current pressure value and the current inner liquid pipe temperature meet a fourth preset condition or not according to the fourth current pressure value and the current inner liquid pipe temperature corresponding to the fourth current pressure value;
and if the third current pressure value and the outdoor environment temperature meet the third preset condition, and the fourth current pressure value and the current indoor liquid pipe temperature meet the fourth preset condition, judging that the pressure sensor is abnormal.
10. The method of claim 9, wherein the step of determining whether the third current pressure value and the outdoor ambient temperature satisfy the third preset condition according to the third current pressure value and the outdoor ambient temperature corresponding to the third current pressure value comprises:
calculating a third saturation temperature corresponding to the third current pressure value according to the third current pressure value;
judging whether the third saturation temperature and the outdoor environment temperature are within a second preset error range or not;
if the third saturation temperature and the outdoor environment temperature are within a second preset error range, determining that the third current pressure value and the outdoor environment temperature meet the third preset condition;
otherwise, judging that the third current pressure value and the outdoor environment temperature do not meet the third preset condition.
11. The method according to claim 9, wherein the step of determining whether the fourth current pressure value and the current indoor liquid pipe temperature satisfy the fourth preset condition according to the fourth current pressure value and the current indoor liquid pipe temperature corresponding to the fourth current pressure value includes:
calculating a fourth saturation temperature corresponding to the fourth current pressure value according to the fourth current pressure value;
judging whether the fourth saturation temperature is lower than the current temperature of the inner liquid inlet pipe or not;
if the fourth saturation temperature is lower than the current inner liquid pipe temperature, judging that the fourth current pressure value and the current inner liquid pipe temperature meet the fourth preset condition;
otherwise, judging that the fourth current pressure value and the current temperature of the internal liquid pipe do not meet the fourth preset condition.
12. A pressure sensor abnormality control device for an air conditioner, characterized by comprising:
a first obtaining module: the method comprises the steps of obtaining an operation mode of the air conditioner;
a second obtaining module: the control device is used for acquiring the current temperature of an outdoor unit liquid pipe of the air conditioner if the operation mode of the air conditioner is a refrigeration mode;
a third obtaining module: the temperature control device is used for acquiring the current temperature of an indoor machine liquid pipe of the air conditioner if the operation mode of the air conditioner is a heating mode;
a judging module: the pressure sensor is used for judging whether the pressure sensor of the air conditioner is abnormal or not;
a control module: the controller is used for controlling the air conditioner to operate in a fault mode according to the current temperature of the outer liquid pipe if the operation mode of the air conditioner is a refrigeration mode and the pressure sensor is abnormal;
the control module is further configured to: if the operation mode of the air conditioner is a heating mode and the pressure sensor is abnormal, controlling the air conditioner to operate with a fault according to the current temperature of the inner liquid pipe;
the judging module is further configured to: if the operation mode of the air conditioner is a refrigeration mode, acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the outer liquid pipe;
the judging module is further configured to: if the operation mode of the air conditioner is a heating mode, acquiring the outdoor environment temperature and the current pressure value of the pressure sensor; and judging whether the pressure sensor is abnormal or not according to the outdoor environment temperature, the current pressure value and the current temperature of the internal liquid pipe.
13. An air conditioner comprising a controller storing a control program for pressure sensor abnormality, the program when executed implementing the method according to any one of claims 1 to 11.
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