CN114427737B - Air conditioner noise-proof control method and device and air conditioner - Google Patents

Air conditioner noise-proof control method and device and air conditioner Download PDF

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Publication number
CN114427737B
CN114427737B CN202210086400.3A CN202210086400A CN114427737B CN 114427737 B CN114427737 B CN 114427737B CN 202210086400 A CN202210086400 A CN 202210086400A CN 114427737 B CN114427737 B CN 114427737B
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China
Prior art keywords
air conditioner
indoor unit
expansion valve
pipe pressure
electronic expansion
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CN202210086400.3A
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Chinese (zh)
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CN114427737A (en
Inventor
刘建勋
陈东
黄春
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Priority to CN202210086400.3A priority Critical patent/CN114427737B/en
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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
    • F24F11/30—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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/247—Active noise-suppression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
    • F24F2130/40—Noise
    • 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

Abstract

The invention discloses an air conditioner noise-proof control method and device and an air conditioner, and relates to the technical field of air conditioners, wherein the air conditioner noise-proof control method comprises the following steps: monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve; judging whether noise generation risks exist in the indoor unit or not based on the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji; if so, the opening degree of the electronic expansion valve is adjusted to prevent noise. According to the invention, when noise generation risk exists in the indoor unit, the opening degree of the electronic expansion valve can be automatically controlled, so that the expansion valve is reversely jacked up by continuously increasing the actual reverse pressure difference of the electronic expansion valve, the indoor unit is prevented from generating larger noise, and the user experience is improved.

Description

Air conditioner noise-proof control method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner noise prevention control method and device and an air conditioner.
Background
When the air conditioner is operated, under the condition that the indoor unit is an alternating current motor, if the conditions of improper static pressure setting, internal machine filth blockage or power zero and live wire misconnection and the like occur, the motor can possibly generate thermal protection stop, when the indoor motor generates thermal protection stop, the unit still keeps normal operation, the compressor still maintains higher frequency, after the indoor unit fan stops in a heating mode, the air conditioner is easy to lead to Wen Tingji, the opening of the electronic expansion valve is further reduced gradually until the electronic expansion valve is closed, when the opening of the expansion valve of the indoor unit is closed to 0pls, the actual reverse pressure difference (namely the actual inlet pressure-outlet pressure of the expansion valve) of the indoor unit can be larger than the reverse valve opening pressure difference, so that the expansion valve reversely pushes open, and extremely large noise is generated, and the user experience is reduced.
Disclosure of Invention
In order to solve the problems, the invention provides an air conditioner noise prevention control method and device and an air conditioner, which can automatically control the opening of an electronic expansion valve when noise generation risks exist in an indoor unit, and avoid the fact that the actual reverse pressure difference of the electronic expansion valve is continuously increased to reversely jack up the expansion valve, so that the indoor unit is prevented from generating larger noise, and user experience is improved.
According to an embodiment of the present invention, in one aspect, there is provided an air conditioner anti-noise control method, including: monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve; judging whether noise generation risks exist in the indoor unit or not based on the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji; if so, the opening degree of the electronic expansion valve is adjusted to prevent noise.
Through adopting above-mentioned technical scheme, according to the running state of air conditioner and the inlet pipe pressure and the exit tube pressure of electronic expansion valve, whether the noise production risk exists in the automatic judgement indoor set, can be when the indoor set exists the noise production risk, automatic control the electronic expansion valve aperture, avoid the actual reverse differential pressure of electronic expansion valve to continue to increase and make the expansion valve reverse jack-up to avoid the indoor set to produce great noise, promoted user experience.
Preferably, the operation state of the air conditioner includes an operation state of an indoor unit and an operation state of a compressor; the step of judging whether noise generation risk exists in the indoor unit or not based on the operation state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji comprises the following steps: monitoring the indoor environment temperature, and determining that the air conditioner heats up to Wen Tingji when the temperature difference between the indoor environment temperature and the set temperature is smaller than or equal to a preset temperature difference; calculating a reverse differential pressure of the electronic expansion valve based on the inlet pipe pressure and the outlet pipe pressure; and judging whether the noise generation risk exists in the indoor unit or not based on the running state of the indoor unit and the running state of the compressor when the reverse pressure difference is larger than or equal to a preset pressure difference.
Through adopting above-mentioned technical scheme, when the air conditioner heats up to Wen Tingji, detect the reverse pressure differential of electronic expansion valve to judge whether the reverse pressure differential of electronic expansion valve is close to reverse valve opening pressure differential, through further judging whether the indoor set exists the noise and produces the risk according to the running state of indoor set and compressor when reverse pressure differential is greater than or equal to predetermineeing the pressure differential, can accurately judge whether the indoor set can produce great noise, in order to promote noise control effect.
Preferably, the step of determining whether there is a noise generation risk of the indoor unit based on the operation state of the indoor unit and the operation state of the compressor includes: detecting the running current of the indoor unit and the running current of the compressor; and when the running current of the indoor unit and the running current of the compressor are both 0, determining that the indoor unit has noise generation risk.
By adopting the technical scheme, when the reverse differential pressure is greater than or equal to the preset differential pressure, the running currents of the indoor unit and the compressor are continuously detected to judge whether the indoor unit stops running and whether only the indoor unit is in the running state currently, so that whether the reverse differential pressure of the electronic expansion valve is further increased is judged, and the accuracy of judging the noise generation risk of the indoor unit is ensured.
Preferably, the step of adjusting the opening of the electronic expansion valve includes: and controlling the opening degree of the electronic expansion valve to be increased to a preset opening degree.
By adopting the technical scheme, the electronic expansion valve is controlled to be increased, the electronic expansion valve is prevented from being closed due to the fact that the electronic expansion valve is continuously reduced, the reverse pressure difference of the electronic expansion valve is prevented from being further increased, and noise is prevented from being generated by the indoor unit.
Preferably, the value range of the preset opening is [80, 150] pls.
By adopting the technical scheme, the reverse pressure difference of the electronic expansion valve can be prevented from being further increased, and the indoor unit is prevented from generating larger noise due to reverse jacking of the expansion valve.
Preferably, the air conditioner noise control method further comprises the following steps: when the electronic expansion valve operates at the preset opening, periodically detecting the current inlet pipe pressure and the current outlet pipe pressure; and if the current inlet pipe pressure is equal to the current outlet pipe pressure, controlling the electronic expansion valve to be closed.
By adopting the technical scheme, when the pressure of the front inlet pipe is equal to the pressure of the front outlet pipe, namely when the pressure of the air conditioning system is balanced and the risk of noise generation does not exist, the electronic expansion valve is closed, so that the air conditioner is recovered to normal operation, and the operation stability of the air conditioner is ensured.
Preferably, the air conditioner noise control method further comprises the following steps: if the times of detecting that the noise generation risk of the indoor unit reaches the preset times within the preset time length, sending out an air conditioner fault prompt to prompt a user to conduct fault troubleshooting.
Through adopting above-mentioned technical scheme, can instruct the user to troubleshoot the fault reason and maintain to solve the problem that the indoor set produced the noise easily from the root, guaranteed the reliability of air conditioner operation, promoted user experience.
According to an embodiment of the present invention, there is provided an air conditioner anti-noise control apparatus including: the monitoring module is used for monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve; the judging module is used for judging whether noise generation risks exist in the indoor unit or not based on the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji; and the control module is used for adjusting the opening of the electronic expansion valve when the noise generation risk exists in the indoor unit so as to prevent noise generation.
According to an embodiment of the present invention, there is provided an air conditioner including a computer readable storage medium storing a computer program and a processor, the computer program implementing the method according to any one of the first aspects when read and executed by the processor.
According to an embodiment of the present invention, there is provided in a further aspect a computer readable storage medium storing a computer program which, when read and executed by a processor, implements a method according to any one of the first aspects.
The invention has the following beneficial effects: through when the air conditioner heats and reaches the temperature, according to the running state of the air conditioner and the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve, whether the indoor unit has noise generation risk or not is automatically judged, when the indoor unit has noise generation risk, the opening degree of the electronic expansion valve can be automatically controlled, the actual reverse pressure difference of the electronic expansion valve is prevented from being continuously increased, the expansion valve is prevented from being reversely jacked up, the indoor unit is prevented from generating larger noise, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a flow chart of an air conditioner anti-noise control method provided by the invention;
FIG. 2 is a flow chart of the noise control of the multi-split air conditioner provided by the invention;
FIG. 3 is a schematic diagram of a multi-split air conditioner according to the present invention;
fig. 4 is a schematic structural diagram of an anti-noise control device for an air conditioner according to the present invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The present embodiment provides an air conditioner anti-noise control method, which may be applied to an air conditioner (the air conditioner may include one or more indoor units), referring to a flowchart of the air conditioner anti-noise control method shown in fig. 1, and the method mainly includes the following steps S102 to S106:
step S102: and monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve.
Pressure sensors are arranged in front of and behind the electronic expansion valve of the indoor unit, and in the heating process of the air conditioner, the inlet pipe pressure and the outlet pipe pressure of a pipeline where the electronic expansion valve of the indoor unit is located are detected in real time based on the pressure sensors. Because the air conditioner normally works in the heating operation stage, the electronic expansion valve of the indoor unit can be adjusted according to the supercooling degree, the outlet pipe pressure is small in change, and when the air conditioner unit operates abnormally, the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve can be greatly changed, so that whether the air conditioner possibly has noise problem can be judged.
Step S104: and judging whether the indoor unit has noise generation risk or not based on the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji.
And detecting whether the air conditioner meets the heating temperature reaching shutdown condition in real time, and if so, determining that the air conditioner reaches Wen Tingji.
The inventor finds that under the heating mode, after the fan of the indoor unit stops, the detected temperature of the indoor unit environmental temperature sensor can be rapidly increased due to heat radiation, when the detected environmental temperature is greater than the set temperature, the indoor unit enters into warm stop control, at the moment, the high pressure of the air conditioning system is too high, high pressure protection occurs, the compressor gradually stops running, the opening of the indoor unit electronic expansion valve is gradually reduced, and when the opening of the indoor unit expansion valve is closed to 0pls, the noise is extremely generated.
Therefore, when the air conditioner heats up to Wen Tingji, the running state of the air conditioner can influence the high pressure of the system, so that the opening degree adjustment of the expansion valve is influenced, and when the air conditioner heats up to Wen Tingji each time, the current running state of the air conditioner is detected, wherein the running state can comprise the running state of the indoor unit and/or the compressor, and whether the indoor unit has a great noise risk can be accurately judged according to the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure of a pipeline where the electronic expansion valve is located.
Step S106: if so, the opening degree of the electronic expansion valve is adjusted to prevent noise.
When the noise generation risk of the indoor unit is determined, the opening of the electronic expansion valve is automatically adjusted to prevent the opening of the electronic expansion valve from being reduced to 0pls, the expansion valve is prevented from being reversely jacked, and the generation of extremely large noise can be avoided.
According to the air conditioner noise-proof control method, when the air conditioner heats and reaches the temperature, whether the indoor unit has noise generation risks or not is automatically judged according to the running state of the air conditioner and the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve, the opening of the electronic expansion valve can be automatically controlled when the indoor unit has noise generation risks, the actual reverse pressure difference of the electronic expansion valve is prevented from being continuously increased, the expansion valve is prevented from being reversely jacked, larger noise is prevented from being generated by the indoor unit, and user experience is improved.
In a possible implementation manner, the operation state of the air conditioner includes an operation state of an indoor unit and an operation state of a compressor; the embodiment provides an implementation manner of judging whether noise generation risk exists in the indoor unit or not based on the operation state, the inlet pipe pressure and the outlet pipe pressure of the air conditioner every time the air conditioner heats up to Wen Tingji, and specifically can be executed with reference to the following steps (1) to (3):
step (1): and monitoring the indoor environment temperature, and determining that the air conditioner heats up to Wen Tingji when the temperature difference between the indoor environment temperature and the set temperature is smaller than or equal to the preset temperature difference.
Based on the temperature sensor, the indoor environment temperature To is detected in real time, the set temperature Ts is obtained, the set temperature can be a user set temperature or a default temperature, when the absolute value of the difference value between the indoor environment temperature and the set temperature is smaller than or equal To a preset temperature difference, namely the indoor environment temperature is close To the set temperature, the air conditioner heats and stops working, the preset temperature can be 1-3 ℃, and the optimal value is 3 ℃.
In one embodiment, when the temperature of the |Ts-to| > 3 ℃, the indoor unit does not reach the set temperature, and the indoor unit operates normally; when the temperature of the |Ts-to| is less than or equal To 3 ℃, the indoor unit is determined To reach Wen Tingji.
Step (2): and calculating the reverse pressure difference of the electronic expansion valve based on the inlet pipe pressure and the outlet pipe pressure.
Since the refrigerant flows in from the outlet of the electronic expansion valve and flows out from the inlet of the electronic expansion valve in the heating mode, the refrigerant flows in the reverse direction, and thus the refrigerant is called a reverse pressure difference, and the reverse pressure difference=the inlet pipe pressure Pin-the outlet pipe pressure Pout. In order to judge whether the currently detected reverse pressure difference of the electronic expansion valve is larger than the reverse valve opening pressure difference, judging whether the reverse pressure difference of the electronic expansion valve is larger than or equal to a preset pressure difference.
Step (3): and judging whether the noise generation risk exists in the indoor unit or not based on the running state of the indoor unit and the running state of the compressor when the reverse pressure difference is larger than or equal to a preset pressure difference.
The preset pressure difference can be 1.0-2.0 Mpa, and the preferable value is 1.5Mpa. When the outlet pipe pressure of the electronic expansion valve is rapidly increased (such as when Pout is more than or equal to 3.5 Mpa), and the reverse pressure difference is more than or equal to a preset pressure difference, namely when Pout is more than or equal to 3.5Mpa and (Pin-Pout) is more than or equal to 1.5Mpa, the outlet pipe pressure of the electronic expansion valve is abnormal, the reverse pressure difference is abnormal and approaches to a nominal value (namely approaches to a reverse valve opening pressure difference), noise temperature can occur in an air conditioner, and whether the indoor unit has larger noise generation risk is judged based on the running state of the indoor unit and the running state of the compressor.
When the air conditioner is heated to Wen Tingji, the reverse pressure difference of the electronic expansion valve is detected to judge whether the reverse pressure difference of the electronic expansion valve is close to the reverse valve opening pressure difference, and whether the indoor unit generates noise or not is judged according to the running states of the indoor unit and the compressor when the reverse pressure difference is larger than or equal to the preset pressure difference, so that whether the indoor unit generates larger noise or not can be accurately judged, and the noise control effect is improved.
In one possible implementation manner, the embodiment provides a specific implementation manner of determining whether the indoor unit has a noise generation risk based on the operation state of the indoor unit and the operation state of the compressor: detecting the running current of the indoor unit and the running current of the compressor; when the operation current of the indoor unit and the operation current of the compressor are both 0, it is determined that the indoor unit has a noise generation risk.
The method comprises the steps of setting current sensors on an indoor unit motor and an outdoor unit compressor, detecting the running current Id of the indoor unit and the running current Iy of the compressor in real time, judging whether the running current Id of the indoor unit is 0, if the running current Id of the indoor unit is 0, indicating that the indoor unit is stopped, further judging whether the running current Iy of the compressor is 0, if Iy is not equal to 0, indicating that the air conditioning system has a plurality of indoor units running, and if the running current Iy of the compressor is not equal to 0, indicating that the air conditioning system has only one indoor unit running, and after the indoor unit and the compressor are stopped running, the reverse differential pressure of the electronic expansion valve is continuously increased, so that a large noise generation risk exists.
And when the reverse pressure difference is larger than or equal to the preset pressure difference, the running currents of the indoor unit and the compressor are continuously detected to judge whether the indoor unit stops running or not and whether only the indoor unit is in a running state currently, so that whether the reverse pressure difference of the electronic expansion valve is further increased or not is judged, and the accuracy of judging the noise generation risk of the indoor unit is ensured.
In one possible implementation manner, the embodiment provides a specific implementation manner of adjusting the opening of the electronic expansion valve when noise generation risk exists in the indoor unit: and controlling the opening degree of the electronic expansion valve to be increased to a preset opening degree. The electronic expansion valve is controlled to be increased, so that the electronic expansion valve is prevented from being closed due to the fact that the electronic expansion valve is continuously reduced, the reverse pressure difference of the electronic expansion valve is prevented from being further increased, and noise of the indoor unit is prevented.
In a possible implementation manner, the preset opening range is [80, 150] pls. The inventor finds through noise and reliability experiment research that the electronic expansion valve reaches 80Pls, which is a necessary condition for ensuring that the expansion valve does not reversely jack up, when the indoor unit and the compressor stop running, the electronic expansion valve of the indoor unit is automatically regulated to be within the interval range of [80-150] Pls, so that the further increase of the reverse pressure difference of the electronic expansion valve can be avoided, and further the generation of larger noise of the indoor unit caused by the reverse jack up of the expansion valve is avoided.
In a possible implementation manner, the method for controlling noise prevention of an air conditioner provided in this embodiment further includes: when the electronic expansion valve operates at a preset opening, periodically detecting the current inlet pipe pressure and the current outlet pipe pressure; and if the current inlet pipe pressure is equal to the current outlet pipe pressure, controlling the electronic expansion valve to be closed.
When the opening of the electronic expansion valve is controlled to be increased to a preset opening for operation, the current inlet pipe pressure and the current outlet pipe pressure of the electronic expansion valve are continuously monitored, the relationship between the current inlet pipe pressure and the current outlet pipe pressure is judged once every 5-10 seconds, if the current inlet pipe pressure is equal to the current outlet pipe pressure, the pressure of the air conditioning system is balanced, the indoor unit has no risk of generating noise, the electronic expansion valve of the indoor unit can be closed, namely, the opening of the electronic expansion valve of the indoor unit is automatically adjusted to 0pls, and the air conditioning unit is enabled to resume normal operation.
In a possible implementation manner, the method for controlling noise prevention of an air conditioner provided in this embodiment further includes: if the times of detecting that the noise generation risk of the indoor unit reaches the preset times in the preset time length, sending out an air conditioner fault prompt to prompt a user to conduct fault investigation.
The value range of the preset time period can be 20-40 min, preferably 30min, and the value range of the preset times can be 2-4 times, preferably 3 times. The fault cues may include any one or more of audible cues, light cues, and display cues.
In the heating process of the air conditioner, if the indoor unit is continuously judged to generate noise for 3 times within 30min, the air conditioner fault prompt is continuously sent out to prompt a user to check the fault reason for maintenance, so that the problem that the indoor unit easily generates noise is fundamentally solved, the running reliability of the air conditioner is ensured, and the user experience is improved.
According to the air conditioner noise control method provided by the embodiment, whether the indoor unit has the risk of extremely high noise can be effectively judged by detecting the reverse pressure difference of the electronic expansion valve and the parameters of the outdoor unit and the compressor; when the noise problem possibly occurs in the indoor unit, the opening degree of the indoor unit electronic expansion valve is automatically adjusted, so that the noise problem is avoided; and a fault prompt is sent to prompt a user to check the reason, so that the reliability problem of the air conditioning system is avoided.
Corresponding to the method for controlling noise of the air conditioner provided in the foregoing embodiment, the embodiment of the present invention provides an example of performing noise control on the multi-split air conditioner by applying the method for controlling noise of the air conditioner, which is described with reference to the flow chart of noise control of the multi-split air conditioner shown in fig. 2, and may be specifically performed with reference to the following steps S201 to S206:
in step S201, in the heating operation stage, when the actual reverse pressure difference is detected to be more than or equal to 1.5Mpa, the noise problem of the indoor unit is judged to possibly occur.
Referring to a schematic diagram of a multi-split air conditioner shown in fig. 3, the multi-split air conditioner includes a compressor 31, an outdoor heat exchanger 32, an outdoor electronic expansion valve 33, a plurality of indoor heat exchangers 34, and a plurality of indoor electronic expansion valves 35. The reverse pressure difference of the electronic expansion valve is a difference of the actual pressure at the inlet of the expansion valve minus the pressure at the outlet of the expansion valve, and is referred to as a reverse pressure difference because the refrigerant flows in from the outlet of the expansion valve and flows out from the inlet in the heating mode, as shown in fig. 3.
Pressure sensors are arranged in front and behind the electronic expansion valve of the indoor unit, and the inlet pipe pressure Pin and the outlet pipe pressure Pout of the electronic expansion valve are detected in real time; in the heating operation stage, when the system works normally, the expansion valve of the indoor unit can be adjusted according to the supercooling degree, and the pressure change of the outlet pipe is small; however, when the air conditioning system is abnormally operated, namely the rapid rise of the outlet pipe pressure Pout of the expansion valve is detected, and the actual reverse pressure difference (Pin-Pout) is more than or equal to 1.5Mpa (the pressure difference is abnormal and is close to the nominal value), the noise problem of the air conditioning indoor unit can be judged.
Step S202, detecting the indoor environment temperature To and the set temperature Ts in real time, and determining that the indoor unit reaches Wen Tingji when the temperature of the |Ts-to| is less than or equal To 3 ℃.
Detecting the set temperature Ts and the ambient temperature To of the indoor unit; calculating the temperature difference delta T= -Ts-to|, and controlling the indoor unit normally when delta T is more than 3 ℃; when the delta T is less than or equal to 3 ℃, judging that the indoor unit enters into warm stop.
Step S203, judging whether the indoor unit motor is operating normally, if not, executing step S204.
The method comprises the steps that current sensors are arranged on an indoor unit motor and an outdoor unit compressor, and the current value Id of the indoor unit and the current value Iy of the compressor are detected in real time; judging whether the current value Id of the indoor unit is 0, and if Id is not equal to 0, controlling the indoor unit normally; if id=0, it indicates that the present indoor unit is stopped, it is further determined whether the compressor current is equal to 0 to determine whether only the indoor unit is operated, so when id=0, step S204 is performed.
Step S204, judging whether the compressor is normally operated, if not, executing step S205.
Judging whether the current value Iy of the compressor is 0 or not, if Iy is not equal to 0, judging that a plurality of indoor units are arranged in the system, and operating the indoor units according to normal control; if iy=0, it is determined that only one indoor unit in the air conditioning system is turned on.
Step S205, automatically adjusting the opening of the electronic expansion valve of the indoor unit to 80-150pls.
And (3) analyzing the noise and reliability experimental results: the valve opening reaches 80Pls, which is a necessary condition for ensuring that the expansion valve is not reversely jacked, when the expansion valve is opened to 80-150Pls, the actual reverse pressure difference of the system is gradually reduced, the system is maintained to a warm stop state, and when the system has a heating requirement again, the opening of the expansion valve is controlled preferentially according to the control logic of the system.
In step S206, when pin=pout, the electronic expansion valve opening is automatically adjusted to 0pls.
The pressure values of the inlet pipe and the outlet pipe of the indoor machine electronic expansion valve are continuously monitored, the pressure value is judged once every 10 seconds, when pin=pout is detected, the pressure of the system is balanced, the indoor machine electronic expansion valve can be closed, and the risk of noise generation is avoided. Therefore, the opening degree of the electronic expansion valve of the indoor unit is automatically adjusted to 0pls. After the temperature of the motor is reduced, the thermal protection of the motor can be released, and the unit resumes normal operation.
If the risk of noise problem is continuously monitored for 3 times within 30min, a fault prompt is continuously sent to prompt a user to check the reason, so that the problem is fundamentally solved.
Corresponding to the method for controlling the noise of the air conditioner provided by the above embodiment, the embodiment of the invention provides an apparatus for controlling the noise of the air conditioner, which can be applied to the air conditioner, referring to the schematic structural diagram of the apparatus for controlling the noise of the air conditioner shown in fig. 4, and the apparatus comprises the following modules:
and the monitoring module 41 is used for monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve.
The judging module 42 is configured to judge whether the indoor unit is at risk of noise generation based on the operation state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure whenever the air conditioner heats up to Wen Tingji.
The control module 43 is configured to adjust the opening of the electronic expansion valve to prevent noise from being generated when noise generation risk exists in the indoor unit.
According to the air conditioner noise control device, when the air conditioner heats and reaches the temperature, whether the indoor unit has noise generation risks or not is automatically judged according to the running state of the air conditioner and the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve, the opening of the electronic expansion valve can be automatically controlled when the indoor unit has noise generation risks, the actual reverse pressure difference of the electronic expansion valve is prevented from being continuously increased, the expansion valve is reversely jacked up, the indoor unit is prevented from generating larger noise, and user experience is improved.
In one embodiment, the operation state of the air conditioner includes an operation state of an indoor unit and an operation state of a compressor; the judging module 42 is further configured to monitor an indoor environment temperature, and determine that the air conditioner heats up to Wen Tingji when a temperature difference between the indoor environment temperature and the set temperature is less than or equal to a preset temperature difference; calculating a reverse differential pressure of the electronic expansion valve based on the inlet pipe pressure and the outlet pipe pressure; and judging whether the noise generation risk exists in the indoor unit or not based on the running state of the indoor unit and the running state of the compressor when the reverse pressure difference is larger than or equal to a preset pressure difference.
In one embodiment, the judging module 42 is further configured to detect an operation current of the indoor unit and an operation current of the compressor; when the operation current of the indoor unit and the operation current of the compressor are both 0, it is determined that the indoor unit has a noise generation risk.
In one embodiment, the control module 43 is further configured to control the opening of the electronic expansion valve to increase to a preset opening.
In one embodiment, the preset opening is in the range of [80, 150] pls.
In one embodiment, the apparatus further comprises:
the second control module is used for periodically detecting the current inlet pipe pressure and the current outlet pipe pressure when the electronic expansion valve operates at a preset opening degree; and if the current inlet pipe pressure is equal to the current outlet pipe pressure, controlling the electronic expansion valve to be closed.
And the prompting module is used for sending out an air conditioner fault prompt when the times of detecting that the noise generation risk of the indoor unit in the preset time reaches the preset times so as to prompt a user to conduct fault investigation.
According to the air conditioner noise control device provided by the embodiment, whether the indoor unit has the risk of extremely high noise can be effectively judged by detecting the reverse pressure difference of the electronic expansion valve and the parameters of the outdoor unit and the compressor; when the noise problem possibly occurs in the indoor unit, the opening degree of the indoor unit electronic expansion valve is automatically adjusted, so that the noise problem is avoided; and a fault prompt is sent to prompt a user to check the reason, so that the reliability problem of the air conditioning system is avoided.
Corresponding to the method for controlling the noise of the air conditioner provided by the above embodiment, the present embodiment provides an air conditioner including a computer readable storage medium storing a computer program and a processor, where the computer program is read and executed by the processor to implement the method for controlling the noise of the air conditioner provided by the above embodiment.
Pressure sensors are respectively arranged at the inlet and outlet pipe openings of the indoor electronic expansion valves of the air conditioner so as to detect the inlet pipe pressure and the outlet pipe pressure of each electronic expansion valve; the indoor unit motor and the compressor are respectively provided with a current sensor to detect the running current of the indoor unit and the compressor.
The present embodiment also provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above-mentioned embodiment of the anti-noise control method of an air conditioner, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
Of course, it will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer level to instruct a control device, where the program may be stored in a computer readable storage medium, and the program may include the above-described methods in the embodiments when executed, where the storage medium may be a memory, a magnetic disk, an optical disk, or the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Finally, it is further noted that relational terms such as first and second, and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The air conditioner anti-noise control device and the air conditioner disclosed in the embodiments correspond to the air conditioner anti-noise control method disclosed in the embodiments, so that the description is simpler, and the relevant parts only need to be referred to in the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (8)

1. An air conditioner noise control method, comprising:
monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve;
judging whether noise generation risks exist in the indoor unit or not based on the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji;
if so, the opening of the electronic expansion valve is adjusted to prevent noise;
the running state of the air conditioner comprises the running state of the indoor unit and the running state of the compressor; the step of judging whether noise generation risk exists in the indoor unit or not based on the operation state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji comprises the following steps: monitoring the indoor environment temperature, and determining that the air conditioner heats up to Wen Tingji when the temperature difference between the indoor environment temperature and the set temperature is smaller than or equal to a preset temperature difference;
calculating a reverse differential pressure of the electronic expansion valve based on the inlet pipe pressure and the outlet pipe pressure;
detecting the running current of the indoor unit and the running current of the compressor when the reverse pressure difference is larger than or equal to a preset pressure difference; and when the running current of the indoor unit and the running current of the compressor are both 0, determining that the indoor unit has noise generation risk.
2. The method of controlling noise prevention of an air conditioner according to claim 1, wherein the step of adjusting the opening degree of the electronic expansion valve comprises:
and controlling the opening degree of the electronic expansion valve to be increased to a preset opening degree.
3. The method of claim 2, wherein the preset opening has a value in the range of 80, 150pls.
4. The air conditioner anti-noise control method as defined in claim 2, further comprising:
when the electronic expansion valve operates at the preset opening, periodically detecting the current inlet pipe pressure and the current outlet pipe pressure;
and if the current inlet pipe pressure is equal to the current outlet pipe pressure, controlling the electronic expansion valve to be closed.
5. The air conditioner anti-noise control method according to any one of claims 1 to 4, further comprising:
if the times of detecting that the noise generation risk of the indoor unit reaches the preset times within the preset time length, sending out an air conditioner fault prompt to prompt a user to conduct fault troubleshooting.
6. An air conditioner noise control device, characterized by comprising:
the monitoring module is used for monitoring the inlet pipe pressure and the outlet pipe pressure of the electronic expansion valve;
the judging module is used for judging whether noise generation risks exist in the indoor unit or not based on the running state of the air conditioner, the inlet pipe pressure and the outlet pipe pressure when the air conditioner heats up to Wen Tingji;
the control module is used for adjusting the opening of the electronic expansion valve when the noise generation risk exists in the indoor unit so as to prevent noise generation;
the running state of the air conditioner comprises the running state of the indoor unit and the running state of the compressor; the judging module is used for monitoring the indoor environment temperature, and determining that the air conditioner heats up to Wen Tingji when the temperature difference between the indoor environment temperature and the set temperature is smaller than or equal to the preset temperature difference; calculating a reverse differential pressure of the electronic expansion valve based on the inlet pipe pressure and the outlet pipe pressure; detecting the running current of the indoor unit and the running current of the compressor when the reverse pressure difference is larger than or equal to a preset pressure difference; and when the running current of the indoor unit and the running current of the compressor are both 0, determining that the indoor unit has noise generation risk.
7. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program implementing the method of any one of claims 1-5 when read and run by the processor.
8. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when read and run by a processor, implements the method according to any of claims 1-5.
CN202210086400.3A 2022-01-25 2022-01-25 Air conditioner noise-proof control method and device and air conditioner Active CN114427737B (en)

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CN113137694A (en) * 2021-04-14 2021-07-20 宁波奥克斯电气股份有限公司 Heating control method and device of air conditioner and air conditioner
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CN101539322A (en) * 2009-03-31 2009-09-23 宁波奥克斯电气有限公司 Method for controlling electronic expansion valve of heating standby indoor unit
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