CN111609522A - Control method of compressor and air conditioner - Google Patents

Control method of compressor and air conditioner Download PDF

Info

Publication number
CN111609522A
CN111609522A CN202010373298.6A CN202010373298A CN111609522A CN 111609522 A CN111609522 A CN 111609522A CN 202010373298 A CN202010373298 A CN 202010373298A CN 111609522 A CN111609522 A CN 111609522A
Authority
CN
China
Prior art keywords
coil
moment
temperature value
air conditioner
time length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010373298.6A
Other languages
Chinese (zh)
Other versions
CN111609522B (en
Inventor
张金瑞
陈琪
牛建勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Shandong Air Conditioning Co Ltd
Original Assignee
Hisense Shandong Air Conditioning Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hisense Shandong Air Conditioning Co Ltd filed Critical Hisense Shandong Air Conditioning Co Ltd
Priority to CN202010373298.6A priority Critical patent/CN111609522B/en
Publication of CN111609522A publication Critical patent/CN111609522A/en
Application granted granted Critical
Publication of CN111609522B publication Critical patent/CN111609522B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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
    • F24F2140/50—Load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

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

Abstract

The application provides a control method of a compressor and an air conditioner, relates to the technical field of air conditioners, and is used for effectively controlling the compressor and improving the safety and reliability of an air conditioning system. The method comprises the following steps: measuring a first temperature value of the coil at a first time; measuring a second temperature value of the coil at a second time; the time length from the first moment to the second moment is less than the first time length; acquiring a first temperature change rate of the coil pipe in a time period from a first moment to a second moment according to a first temperature value of the coil pipe and a second temperature value of the coil pipe; and if the first temperature value of the coil pipe is greater than the second temperature value of the coil pipe and the first temperature change rate is greater than a first threshold value, controlling the coil of the alternating current contactor to be powered off. The application is applied to air conditioner control.

Description

Control method of compressor and air conditioner
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method of a compressor and an air conditioner.
Background
At present, an indoor unit controller is generally arranged in an indoor unit of a low-cost air conditioner so as to realize a scheme of controlling an outdoor unit, and an outdoor controller is not arranged. The specific working principle is that an indoor unit controller controls an alternating current fan motor and an alternating current contactor of an outdoor unit to work, and the alternating current contactor is used for controlling starting and stopping of a compressor. In order to realize the protection of the system, a high-voltage pressure switch is adopted to control an alternating current contactor; the high-voltage pressure switch is a mechanical switch, and controls the compressor by participating in controlling the power supply condition of the control coil of the alternating current contactor.
However, the above-described prior art solutions have drawbacks. This is because the control of the indoor unit controller is open-loop control, and when the system pressure exceeds the high-pressure switch threshold value and causes the high-pressure switch to operate, the state information of the high-pressure switch cannot be acquired. The indoor unit controller cannot know the state information of the high-pressure switch, so that the indoor unit controller cannot effectively control the compressor to stop running, the air conditioner complete machine cannot enter a protection state when the system pressure is abnormal, and a leak in system protection is caused. If the system pressure is abnormal, the internal machine controller cannot effectively control the compressor to stop, and the mechanical pressure switch can frequently act along with the change of the system pressure, so that the alternating current contactor and the compressor are frequently started and stopped, and the service life of the compressor is seriously damaged.
Therefore, a suitable solution is needed to the problem of how to effectively control the compressor when the system pressure is abnormal.
Disclosure of Invention
The application provides a control method of a compressor and an air conditioner, which can effectively control the compressor when the system pressure is abnormal and can effectively improve the safety and reliability of an air conditioning system.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, the present application provides a method of controlling a compressor, the method comprising:
acquiring a first temperature value of the coil pipe at a first moment, and acquiring a second temperature value of the coil pipe at a second moment; and the time length from the first moment to the second moment is less than the first time length. According to the first temperature value of the coil and the second temperature value of the coil, a first temperature change rate of the coil in a time period from the first moment to the second moment is obtained. And if the first temperature value of the coil pipe is greater than the second temperature value of the coil pipe and the first temperature change rate is greater than a first threshold value, controlling the coil of the alternating current contactor to be powered off.
Based on the technical scheme, the first temperature change rate of the coil pipe in the time period from the first moment to the second moment is obtained, if the first temperature value of the coil pipe is larger than the second temperature value of the coil pipe and the first temperature change rate is larger than a first threshold value, the temperature of the coil pipe is fast reduced at the moment and is in an abnormal working state, and then the system pressure is deduced to be in an abnormal state. Finally, this application control ac contactor coil outage for the compressor stops the operation. This application utilizes the compressor to shut down the back through the mode of software cooperation hardware, and the temperature rate of change of coil pipe has this characteristics of great difference when comparing in the operation under machine normal pressure, can be on the basis that does not change current air conditioner hardware, judges the state that whether air conditioner system is in pressure anomaly to carry out effective control to the compressor, can effectively improve the security and the reliability of system.
In one possible design, the ac contactor is maintained in the energized state if the first rate of temperature change is less than or equal to a first threshold.
In one possible design, the alternating current contactor coil is controlled to be energized at a third time after the alternating current contactor coil is controlled to be de-energized; and the time length from the second moment to the third moment is less than the second time length. Acquiring a third temperature value of the coil pipe at a fourth moment, and acquiring a fourth temperature value of the coil pipe at a fifth moment; and the time length from the third moment to the fourth moment is less than the third time length, and the time length from the fourth moment to the fifth moment is less than the first time length. And acquiring a second temperature change rate of the coil pipe in a time period from the fourth moment to the fifth moment according to the third temperature value of the coil pipe and the fourth temperature value of the coil pipe. If the second temperature change rate is smaller than or equal to the first threshold value, the alternating current contactor is kept in a power-on state; and if the third temperature value of the coil pipe is greater than the fourth temperature value of the coil pipe and the second temperature change rate is greater than the first threshold value, controlling the coil of the alternating current contactor to be powered off.
In one possible design, if the air conditioner further includes a display terminal, sending fault information to the display terminal of the air conditioner when the first temperature change rate or the second temperature change rate is greater than the first threshold, where the fault information is used to indicate that the display terminal displays that the air conditioner is in a fault state.
In one possible design, the coil is an outdoor unit coil when the air conditioner is in a cooling mode; when the air conditioner is in a heating mode, the coil is an indoor unit coil.
In a second aspect, the present application provides an air conditioner comprising: the device comprises an acquisition unit, a processing unit and a control unit. The system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first temperature value of a coil pipe at a first moment; the temperature sensor is also used for acquiring a second temperature value of the coil pipe at a second moment; and the time length from the first moment to the second moment is less than the first time length. And the processing unit is used for acquiring a first temperature change rate of the coil pipe in a time period from the first moment to the second moment according to the first temperature value of the coil pipe and the second temperature value of the coil pipe. And the control unit is used for controlling the coil of the alternating current contactor to be powered off when the first temperature value of the coil is greater than the second temperature value of the coil and the first temperature change rate is greater than a first threshold value.
In one possible design, the control unit is further configured to maintain the ac contactor in the energized state when the first temperature change rate is less than or equal to a first threshold value.
In one possible design, the control unit is further configured to control the ac contactor coil to be energized at a third time; and the time length from the second moment to the third moment is less than the second time length. The acquisition unit is further used for acquiring a third temperature value of the coil pipe at a fourth moment; the temperature sensor is also used for acquiring a fourth temperature value of the coil pipe at a fifth moment; and the time length from the third moment to the fourth moment is less than the third time length, and the time length from the fourth moment to the fifth moment is less than the first time length. And the processing unit is further used for acquiring a second temperature change rate of the coil pipe in a time period from the fourth moment to the fifth moment according to the third temperature value of the coil pipe and the fourth temperature value of the coil pipe. The control unit is also used for keeping the alternating current contactor in a power-on state when the second temperature change rate is smaller than or equal to the first threshold value; and the control circuit is also used for controlling the alternating current contactor coil to be powered off when the third temperature value of the coil pipe is greater than the fourth temperature value of the coil pipe and the second temperature change rate is greater than the first threshold value.
In one possible design, the air conditioner further includes a display terminal. The display terminal is used for displaying fault information.
In one possible design, the coil is an outdoor unit coil; when the air conditioner is in a heating mode, the coil is an indoor unit coil.
In a third aspect, the present application provides an air conditioner comprising: a processor and a communication interface; the communication interface is coupled to a processor for executing a computer program or instructions to implement the control method of the compressor as described in the first aspect and any one of the possible implementations of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method for controlling a compressor described in the first aspect and any one of the possible implementations of the first aspect.
In a fifth aspect, the present application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the method of controlling a compressor as described in the first aspect and any one of the possible implementations of the first aspect.
In a sixth aspect, the present application provides a chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a computer program or instructions to implement the control method of the compressor as described in the first aspect and any one of the possible implementations of the first aspect.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner provided by the present application;
fig. 2 is a schematic flowchart of a control method for a compressor according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart illustrating another control method for a compressor according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an indoor unit controller according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another indoor unit controller according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship. For example, A/B may be understood as A or B.
The terms "first" and "second" in the description and claims of the present application are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first edge service node and the second edge service node are used for distinguishing different edge service nodes, and are not used for describing the characteristic sequence of the edge service nodes.
Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to the listed steps or modules but may alternatively include other steps or modules not listed or inherent to such process, method, article, or apparatus.
In addition, in the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "e.g.," is intended to present concepts in a concrete fashion.
In order to facilitate the technical solution of the present application, the following describes the structure of the air conditioner.
As shown in fig. 1, a schematic structural diagram of an air conditioner provided by the present application includes an indoor unit and an outdoor unit.
1. Indoor machine
The indoor unit includes: indoor set controller, indoor set coil pipe temperature sensor and fan motor.
The indoor unit coil temperature sensor is used for acquiring the temperature of the indoor unit coil and reporting the temperature to the indoor unit controller.
The indoor unit controller can judge whether the system pressure is in an abnormal condition according to the received data, and then the AC contactor of the outdoor unit is subjected to power-off or power-on control, so that the compressor can be effectively controlled.
2. Outdoor machine
The outdoor unit includes: high-voltage pressure switch, AC contactor, AC fan motor, outdoor unit coil pipe temperature sensor and compressor.
The outdoor unit coil temperature sensor is used for acquiring the temperature of the outdoor unit coil and reporting the temperature to the indoor unit controller.
The alternating current contactor is used for directly controlling the starting and stopping of the compressor. When the coil of the alternating current contactor is in a power-on state, the compressor is in a starting state; when the ac contactor coil is in a de-energized state, the compressor is in a closed state.
The high-voltage pressure switch is a mechanical switch, and controls the compressor by participating in controlling the power supply condition of the control coil of the alternating current contactor.
In the prior art, when the system pressure exceeds a high-pressure switch threshold value to cause the pressure switch to act, the action of an alternating current contactor is further caused, and the compressor is powered off and stopped; when the condition occurs, the pressure of the air conditioning system is in an abnormal state, the system is in an unsafe state, and the internal machine controller is required to control the AC contactor of the compressor to be disconnected, so that the whole machine enters a protection state. However, since the control is open-loop control, the indoor unit controller cannot obtain the key information of the high-pressure switch action, and cannot effectively control the compressor to stop running, thereby causing a leak in system protection. If the compressor cannot be effectively controlled to stop by the internal machine when the system pressure is in an abnormal state, the mechanical high-pressure switch can frequently act along with the change of the system pressure, so that the alternating current contactor and the compressor are frequently started and stopped, and the service life of the compressor is seriously damaged.
In order to solve the problem that the compressor cannot be effectively controlled when the system pressure of the air conditioner is abnormal, the embodiment of the application provides a control method of the compressor and the air conditioner.
As shown in fig. 2, a method for controlling a compressor according to an embodiment of the present application includes the following steps:
s101, an indoor unit controller obtains a first temperature value of a coil pipe at a first moment and a second temperature value of the coil pipe at a second moment.
The coil includes an indoor unit coil and an outdoor unit coil. When the air conditioner is in a refrigeration mode, the indoor unit controller acquires the temperature value of the coil pipe of the outdoor unit; and when the air conditioner is in a heating mode, the indoor unit controller acquires the temperature value of the indoor unit coil.
And the time length from the first moment to the second moment is less than the first time length. This is because if the first time isIf the time length from the moment to the second moment is too long, the first temperature value and the T value obtained by the indoor unit controller2The correlation of (a) will be low and the temperature change law of the coil cannot be accurately reflected.
Alternatively, the first duration may be a fixed value, for example the first duration is set to 3 minutes. Alternatively, the first time period is a value that can be adjusted according to actual conditions. The embodiment of the present application does not limit this.
S102, the indoor unit controller obtains a first temperature change rate of the coil pipe in a time period from a first moment to a second moment according to the first temperature value and the second temperature value of the coil pipe.
Optionally, the first rate of temperature change is calculated according to the following formula:
Figure BDA0002479155430000061
wherein, V1Represents a first temperature change rate, t1Represents a first time instant t2Represents the second time, T1Represents a first temperature value, T2Representing the second temperature value.
And S103, judging whether the system pressure is in an abnormal state or not by the indoor unit controller.
In a possible implementation manner, the indoor unit controller judges whether the system pressure is in an abnormal state according to a first temperature change rate of the coil pipe in a time period from a first time to a second time and a size relation between a first temperature value and a second temperature value. The following two cases are specifically distinguished:
in the first situation, if the first temperature change rate is smaller than or equal to the first threshold, the indoor unit controller determines that the system pressure is in a normal state. In the case where the system pressure is normal, the indoor unit controller executes the following step S104.
Alternatively, the first threshold may be a fixed value, for example, the first threshold is set to 5 ℃/min. Alternatively, the first threshold value is a value that can be adjusted according to the actual situation. The embodiment of the present application does not limit this.
And in the second condition, when the first temperature value is greater than the second temperature value of the coil and the first temperature change rate is greater than the first threshold value, the temperature of the coil is rapidly reduced. The temperature of the coil is dropping rapidly, indicating that the compressor is off and therefore not delivering heat to the coil. And the compressor is in a stop state, which indicates that the high-pressure switch is triggered. And the high-pressure switch is triggered, which indicates that the system pressure is in an abnormal state at the moment. In this way, the indoor unit controller can finally know that the system pressure is in an abnormal state. When the system pressure is abnormal, the indoor unit controller executes the following step S105.
And S104, the indoor unit controller keeps the alternating current contactor in a power-on state.
It can be understood that the indoor unit controller keeps the ac contactor in the energized state, so that the compressor can continue to operate normally.
In one possible implementation, the indoor unit controller performs steps S101 to S103 again after the fourth duration.
Alternatively, the fourth time period may be a fixed value, for example the first time period is set to 5 minutes. Alternatively, the fourth time period is a value that can be adjusted according to the actual situation. The embodiment of the present application does not limit this.
It should be noted that, after the indoor unit controller determines that the system is in the normal state and the fourth time period elapses, the step S101 to the step S103 are executed again, so as to achieve the effect of periodically detecting the air conditioner system, so as to find out the abnormal pressure condition of the air conditioner system in time.
And S105, controlling the coil of the alternating current contactor to be powered off by the indoor unit controller.
It will be appreciated that the indoor unit controller controls the ac contactor coil to be de-energized, enabling the compressor to be shut down.
It should be noted that, even if the high-voltage pressure switch is actuated again, the compressor enters a state of being unable to start due to the power failure of the ac contactor coil, and the compression contactor will not recover to operate, so as to ensure the safety of the air conditioner when the system is abnormal.
Optionally, after controlling the ac contactor coil to be powered off, the indoor unit controller sends fault information to the display terminal of the air conditioner, so that the display terminal displays the identifier of the air conditioner in the fault state, and a user can conveniently and quickly know that the air conditioner is in the fault state. The display terminal may be a liquid crystal display, a status display lamp panel, a light emitting diode array, or the like, which is not limited herein.
Based on the technical scheme, the first temperature change rate of the coil pipe in the time period from the first moment to the second moment is obtained, if the first temperature value of the coil pipe is larger than the second temperature value of the coil pipe and the first temperature change rate is larger than a first threshold value, the temperature of the coil pipe is fast reduced at the moment and is in an abnormal working state, and then the system pressure is deduced to be in an abnormal state. Finally, this application control ac contactor coil outage for the compressor stops the operation. This application utilizes the compressor to shut down the back through the mode of software cooperation hardware, and the temperature rate of change of coil pipe has this characteristics of great difference when comparing in the operation under machine normal pressure, can be on the basis that does not change current air conditioner hardware, judges the state that whether air conditioner system is in pressure anomaly to carry out effective control to the compressor, can effectively improve the security and the reliability of system.
As shown in fig. 3, in order to provide the control method of the compressor according to the present application, after step S105, the method further includes the following steps:
and S201, controlling the alternating current contactor to be electrified at the third moment by the indoor unit controller.
And the time length from the second moment to the third moment is less than the second time length.
Alternatively, the second time period may be a fixed value, for example, the second time period is set to 3 minutes. Alternatively, the second duration is a value that can be adjusted according to actual conditions. The embodiment of the present application does not limit this.
It is understood that the reason why the indoor unit controller controls the ac contactor to be energized at the third time is to restart the compressor and detect the air conditioner system again.
S202, the indoor unit controller obtains a third temperature value of the coil pipe at a fourth moment and a fourth temperature value of the coil pipe at a fifth moment.
It can be understood that, in this step, the indoor unit controller selects the coil object for temperature acquisition according to the operating mode of the air conditioner, which is the same as step S101 and will not be described herein again.
And the time length from the third moment to the fourth moment is less than the third time length. This is because the air conditioner system is operated for a certain period of time after the compressor is restarted, so that the system tends to a steady state, which is convenient for improving the accuracy of the acquired data.
Alternatively, the third time period may be a fixed value, for example, the third time period is set to 10 minutes. Alternatively, the third time period is a value that can be adjusted according to actual conditions. The embodiment of the present application does not limit this.
And the time length from the fourth moment to the fifth moment is less than the first time length. This is because if the time period from the fourth time to the fifth time is too long, the third temperature value and T acquired by the indoor unit controller4The correlation of (a) will be low, and the temperature change rule of the coil cannot be reflected, so that the correlation cannot be used for calculation of the subsequent steps.
S203, the indoor unit controller obtains a second temperature change rate of the coil pipe in a time period from a fourth moment to a fifth moment according to the third temperature value and the fourth temperature value of the coil pipe.
Optionally, the second rate of temperature change is calculated according to the following formula:
Figure BDA0002479155430000081
wherein, V2Represents a second rate of temperature change, t4Represents the fourth time, t5Represents a fifth time, T3Represents a third temperature value, T4Representing a fourth temperature value.
And S204, judging whether the system pressure is in an abnormal state by the indoor unit controller.
In a possible implementation manner, the indoor unit controller judges whether the system pressure is in an abnormal state according to a second temperature change rate of the coil pipe in a time period from the fourth time to the fifth time and a size relation between the third temperature value and the fourth temperature value. The following two cases are specifically distinguished:
and thirdly, if the second temperature change rate is smaller than or equal to the first threshold, the indoor unit controller determines that the system is in a normal state. In the case where the system pressure is normal, the indoor unit controller executes the following step S205.
And in case of the fourth condition, if the third temperature value is greater than the fourth temperature value of the coil pipe and the second temperature change rate is greater than the first threshold value, the indoor unit controller determines that the system pressure is in an abnormal state. The principle of determining that the system pressure is in the abnormal state by the indoor unit controller is the same as that in the second case of step S103, and details are not described here. When the system pressure is abnormal, the indoor unit controller executes the following step S206.
And S205, the indoor unit controller keeps the alternating current contactor in an electrified state.
It can be understood that the indoor unit controller keeps the ac contactor in the energized state, so that the compressor can continue to operate normally.
In one possible implementation, the indoor unit controller performs steps S101 to S103 again after the fourth duration.
It is understood that the indoor unit controller executes step S205 to represent: the indoor unit controller makes a false determination in the above steps S103 and S105, and the system pressure is actually in a normal state. Therefore, the indoor unit controller restores and maintains the ac contactor in the energized state, so that the compressor resumes normal operation.
And S206, controlling the whole air conditioner to be powered off and shut down by the indoor unit controller.
Optionally, the indoor unit controller controls the whole air conditioner to be powered off and shut down, so that the whole air conditioner enters a protection state after the whole air conditioner stops running.
It should be noted that, the air conditioner enters the protection state, which means that: if the maintenance personnel do not carry out troubleshooting on the air conditioner, the air conditioner can not be started to operate even if the air conditioner starting button is triggered. Correspondingly, after the maintenance personnel carry out troubleshooting to the air conditioner, the air conditioner can normally start up and operate.
Optionally, after controlling the entire air conditioner to be powered off and shut down, the indoor unit sends fault shut-down information to the display terminal of the air conditioner, so that the display terminal displays that the entire air conditioner is in a protection state, and a user can know that the entire air conditioner is in a shut-down state due to a fault and can recover to operate only if the fault is removed.
It is understood that, according to actual requirements, the above steps S201 to S204 may be repeated one or more times, that is, the air conditioner system is repeatedly detected for multiple times, so as to avoid the occurrence of misjudgment.
Based on the technical scheme, the indoor unit controller can judge whether the system pressure is in the abnormal state again after judging that the system pressure is in the abnormal state for the first time and after a second time, and if the system pressure is normal, the operation of the compressor is recovered; if the system pressure is still in an abnormal state, the whole air conditioner stops running and enters a protection state. Therefore, the misjudgment of the indoor unit controller on the system pressure condition can be avoided, and on one hand, the air conditioner with the misjudgment of the system pressure is enabled to return to normal operation; on the other hand, the air conditioner in the system pressure abnormal state enters a protection state, and the safety and the reliability of the system are improved.
In the embodiment of the present application, the indoor unit controller may be divided into the functional modules or the functional units according to the above method examples, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in a form of hardware, or may be implemented in a form of a software functional module or a functional unit. The division of the modules or units in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 4 shows a schematic diagram of a possible structure of the indoor unit controller according to the above embodiment. The indoor unit controller 30 includes an acquisition unit 301, a processing unit 302, and a control unit 303.
An obtaining unit 301, configured to obtain a first temperature value of the coil at a first time; the temperature sensor is also used for acquiring a second temperature value of the coil pipe at a second moment; and the time length from the first moment to the second moment is less than the first time length.
The processing unit 302 is configured to obtain a first temperature change rate of the coil within a time period from the first time to the second time according to the first temperature value of the coil and the second temperature value of the coil.
And the control unit 303 is configured to control the ac contactor to switch off the power supply when the first temperature value of the coil is greater than the second temperature value of the coil and the first temperature change rate is greater than a first threshold value.
Optionally, the control unit 303 is further configured to maintain the ac contactor in the energized state when the first temperature change rate is less than or equal to the first threshold.
Optionally, the control unit 303 is further configured to control the ac contactor coil to be energized at a third time; and the time length from the second moment to the third moment is less than the second time length.
Optionally, the obtaining unit 301 is further configured to obtain a third temperature value of the coil pipe at a fourth time; the temperature sensor is also used for acquiring a fourth temperature value of the coil pipe at a fifth moment; and the time length from the third moment to the fourth moment is less than the third time length, and the time length from the fourth moment to the fifth moment is less than the first time length.
Optionally, the processing unit 302 is further configured to obtain a second temperature change rate of the coil in a time period from the fourth time to the fifth time according to the third temperature value of the coil and the fourth temperature value of the coil.
Optionally, the control unit 303 is further configured to keep the ac contactor in the energized state when the second temperature change rate is less than or equal to the first threshold; and the control circuit is also used for controlling the alternating current contactor coil to be powered off when the third temperature value of the coil pipe is greater than the fourth temperature value of the coil pipe and the second temperature change rate is greater than the first threshold value.
Fig. 5 shows a schematic diagram of another possible structure of the indoor unit controller according to the above embodiment. The method comprises the following steps:
a processor 402 for controlling and managing the actions of the indoor unit controller, for example, executing the steps executed by the processing unit 302 and the control unit 303, and/or executing other processes of the technology described herein.
The processor 402 may be any means that can implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The processor may be a central processing unit, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
Optionally, the indoor unit controller may further include a communication interface 403, a memory 401, and a bus 404, where the communication interface 403 is used to support the indoor unit controller to communicate with other network entities. The memory 401 is used for storing program codes and data of the indoor unit controller.
The memory 401 may be a memory in the indoor unit controller, and the memory may include a volatile memory, such as a random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, a hard disk, or a solid state disk; the memory may also comprise a combination of memories of the kind described above.
The bus 404 may be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 404 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
It is obvious to those skilled in the art from the foregoing description of the embodiments that, for convenience and simplicity of description, the foregoing division of each functional module or unit is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules or units according to needs, that is, the internal structure of the device is divided into different functional modules or units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus, and the module described above, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
The present application provides a computer program product containing instructions, which when run on a computer causes the computer to execute the control method of the compressor according to the above method embodiments.
An embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the network device executes the instructions, the network device executes each step executed by the network device in the method flow shown in the foregoing method embodiment.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, an optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium, in any suitable combination, or as appropriate in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A control method of a compressor is characterized by being applied to an air conditioner and comprising the following steps:
acquiring a first temperature value of the coil pipe at a first moment;
acquiring a second temperature value of the coil pipe at a second moment; the time length from the first moment to the second moment is less than a first time length;
acquiring a first temperature change rate of the coil within a time period from the first moment to the second moment according to the first temperature value of the coil and the second temperature value of the coil;
and if the first temperature value of the coil pipe is greater than the second temperature value of the coil pipe and the first temperature change rate is greater than a first threshold value, controlling the coil of the alternating current contactor to be powered off.
2. The method of claim 1, further comprising:
and if the first temperature change rate is smaller than or equal to the first threshold value, keeping the alternating current contactor in an electrified state.
3. The method of claim 1, wherein after de-energizing the control ac contactor coil, the method further comprises:
controlling the coil of the alternating current contactor to be electrified at a third moment; the time length from the second moment to the third moment is less than a second time length;
acquiring a third temperature value of the coil pipe at a fourth moment; the time length from the third moment to the fourth moment is less than a third time length;
acquiring a fourth temperature value of the coil pipe at a fifth moment; the time length from the fourth moment to the fifth moment is less than the first time length;
acquiring a second temperature change rate of the coil within a time period from the fourth moment to the fifth moment according to the third temperature value of the coil and the fourth temperature value of the coil;
if the second temperature change rate is smaller than or equal to a first threshold value, keeping the alternating current contactor in a power-on state;
and if the third temperature value of the coil pipe is greater than the fourth temperature value of the coil pipe and the second temperature change rate is greater than a first threshold value, controlling the coil of the alternating current contactor to be powered off.
4. The method according to any one of claims 1 to 3, wherein in case that the air conditioner further includes a display terminal, the method further comprises:
sending fault information to the display terminal of the air conditioner under the condition that the first temperature change rate or the second temperature change rate is larger than a first threshold value; and the fault information is used for indicating the display terminal to display that the air conditioner is in a fault state.
5. The method according to any one of claims 1-3, further comprising:
when the air conditioner is in a refrigeration mode, the coil is an outdoor unit coil;
when the air conditioner is in a heating mode, the coil is an indoor unit coil.
6. An air conditioner, characterized in that the air conditioner comprises: the device comprises an acquisition unit, a processing unit and a control unit;
the acquisition unit is used for acquiring a first temperature value of the coil pipe at a first moment; the temperature sensor is also used for acquiring a second temperature value of the coil pipe at a second moment; the time length from the first moment to the second moment is less than a first time length;
the processing unit is used for acquiring a first temperature change rate of the coil within a time period from the first moment to the second moment according to a first temperature value of the coil and a second temperature value of the coil;
the control unit is used for controlling the alternating current contactor coil to be powered off when the first temperature value of the coil pipe is larger than the second temperature value of the coil pipe and the first temperature change rate is larger than a first threshold value.
7. The air conditioner according to claim 6,
the control unit is further used for keeping the alternating current contactor in an electrified state when the first temperature change rate is smaller than or equal to a first threshold value.
8. The air conditioner according to claim 6,
the control unit is also used for controlling the coil of the alternating current contactor to be electrified at a third moment; the time length from the second moment to the third moment is less than a second time length;
the acquiring unit is further configured to acquire a third temperature value of the coil pipe at a fourth time; the temperature sensor is also used for acquiring a fourth temperature value of the coil pipe at a fifth moment; the time length from the third moment to the fourth moment is less than a third time length, and the time length from the fourth moment to the fifth moment is less than the first time length;
the processing unit is further configured to obtain a second temperature change rate of the coil within a time period from the fourth time to the fifth time according to a third temperature value of the coil and a fourth temperature value of the coil;
the control unit is further used for keeping the alternating current contactor in an electrified state when the second temperature change rate is smaller than or equal to a first threshold value; and the alternating current contactor is also used for controlling the coil of the alternating current contactor to be powered off when the third temperature value of the coil is greater than the fourth temperature value of the coil and the second temperature change rate is greater than the first threshold value.
9. The air conditioner according to any one of claims 6 to 8, further comprising a display terminal;
and the display terminal is used for displaying the fault information.
10. The air conditioner according to any one of claims 6 to 8,
when the air conditioner is in a refrigeration mode, the coil is an outdoor unit coil;
when the air conditioner is in a heating mode, the coil is an indoor unit coil.
11. An air conditioner, comprising: a processor and a communication interface; the communication interface is coupled to the processor, which is configured to run a computer program or instructions to implement the method of controlling a compressor as claimed in any one of the preceding claims 1 to 5.
12. A computer-readable storage medium having instructions stored therein, wherein when the instructions are executed by a computer, the computer performs the control method of the compressor according to any one of claims 1 to 5.
CN202010373298.6A 2020-05-06 2020-05-06 Control method of compressor and air conditioner Active CN111609522B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010373298.6A CN111609522B (en) 2020-05-06 2020-05-06 Control method of compressor and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010373298.6A CN111609522B (en) 2020-05-06 2020-05-06 Control method of compressor and air conditioner

Publications (2)

Publication Number Publication Date
CN111609522A true CN111609522A (en) 2020-09-01
CN111609522B CN111609522B (en) 2021-08-17

Family

ID=72194577

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010373298.6A Active CN111609522B (en) 2020-05-06 2020-05-06 Control method of compressor and air conditioner

Country Status (1)

Country Link
CN (1) CN111609522B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114719411A (en) * 2021-01-06 2022-07-08 北京小米移动软件有限公司 Controller, air conditioning unit, indoor unit of air conditioning unit and control method of indoor unit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105258289A (en) * 2015-10-15 2016-01-20 珠海格力电器股份有限公司 Method and device for controlling running of compressor and system
WO2018006206A1 (en) * 2016-07-02 2018-01-11 李珂悦 Smart air conditioner
CN107655244A (en) * 2017-07-31 2018-02-02 青岛海尔空调电子有限公司 A kind of magnetic suspension centrifugal air conditioner group control method
CN108036553A (en) * 2017-11-10 2018-05-15 西藏世峰高科能源技术有限公司 Charging pile monitoring room air-conditioning system operation method
CN110044005A (en) * 2019-05-08 2019-07-23 宁波奥克斯电气股份有限公司 A kind of air conditioning control method, device and air-conditioning
CN110160215A (en) * 2019-05-15 2019-08-23 广东美的制冷设备有限公司 Air conditioning control method, device, air conditioner, air-conditioning system and readable storage medium storing program for executing
CN110296508A (en) * 2019-07-01 2019-10-01 宁波奥克斯电气股份有限公司 A kind of air conditioner Thermal comfort control method, device and air conditioner
CN110940057A (en) * 2019-12-12 2020-03-31 宁波奥克斯电气股份有限公司 Control method for slowing down defrosting attenuation of air conditioner and air conditioner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105258289A (en) * 2015-10-15 2016-01-20 珠海格力电器股份有限公司 Method and device for controlling running of compressor and system
WO2018006206A1 (en) * 2016-07-02 2018-01-11 李珂悦 Smart air conditioner
CN107655244A (en) * 2017-07-31 2018-02-02 青岛海尔空调电子有限公司 A kind of magnetic suspension centrifugal air conditioner group control method
CN108036553A (en) * 2017-11-10 2018-05-15 西藏世峰高科能源技术有限公司 Charging pile monitoring room air-conditioning system operation method
CN110044005A (en) * 2019-05-08 2019-07-23 宁波奥克斯电气股份有限公司 A kind of air conditioning control method, device and air-conditioning
CN110160215A (en) * 2019-05-15 2019-08-23 广东美的制冷设备有限公司 Air conditioning control method, device, air conditioner, air-conditioning system and readable storage medium storing program for executing
CN110296508A (en) * 2019-07-01 2019-10-01 宁波奥克斯电气股份有限公司 A kind of air conditioner Thermal comfort control method, device and air conditioner
CN110940057A (en) * 2019-12-12 2020-03-31 宁波奥克斯电气股份有限公司 Control method for slowing down defrosting attenuation of air conditioner and air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114719411A (en) * 2021-01-06 2022-07-08 北京小米移动软件有限公司 Controller, air conditioning unit, indoor unit of air conditioning unit and control method of indoor unit

Also Published As

Publication number Publication date
CN111609522B (en) 2021-08-17

Similar Documents

Publication Publication Date Title
CN107314519B (en) Method and device for judging refrigerant leakage of air conditioner
CN106403142B (en) Multi-online air-conditioning system indoor unit abnormal power-down guard method
US11313570B2 (en) Method and device for controlling electric heating of air conditioner compressor
US20200149532A1 (en) Air conditioner oil return control method, air conditioner and computer readable storage medium
CN111577638B (en) Fan overload protection control method and device and fan overload protection circuit
CN109798703B (en) Heat pump unit and defrosting control method and device thereof
CN111609522B (en) Control method of compressor and air conditioner
CN111023430A (en) Compressor starting control method and device and air conditioner
CN111043707A (en) Compressor reverse rotation detection method and air conditioner
CN111121227B (en) Fault detection method and device under low-voltage pressure switch protection mode and air conditioner
CN107869822B (en) Multi-split air conditioner monitoring method and system and outdoor host
CN113834184B (en) Control method and device for air conditioner and server
CN105157237B (en) The control method and control device of heater
CN107728047B (en) Relay test method, apparatus, relay, storage medium and equipment
WO2024041005A1 (en) Method and apparatus for detecting refrigerant anomaly, air conditioner, and storage medium
CN111465150A (en) Control method and device for ultraviolet L ED lamp
CN108871616B (en) Motor state identification method and device
JP2011145017A (en) Air conditioner
CN115257281A (en) Parking air conditioner, fluorine deficiency detection method and device thereof and storage medium
CN110940032B (en) Power module temperature detection control method and device, storage medium and air conditioner
CN111023441B (en) Air conditioner control method and system, storage medium and air conditioner
CN113900887A (en) Dehumidifier state alarm method and device
CN109323362B (en) Refrigerant leakage fault processing method and system and air conditioner
JP7299517B2 (en) Apparatus, method and system
CN108954667B (en) Fluorine-lacking protection control method for fixed-frequency air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant