CN114608127A - Control method and device for improving noise of indoor unit and air conditioner - Google Patents

Control method and device for improving noise of indoor unit and air conditioner Download PDF

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Publication number
CN114608127A
CN114608127A CN202210093184.5A CN202210093184A CN114608127A CN 114608127 A CN114608127 A CN 114608127A CN 202210093184 A CN202210093184 A CN 202210093184A CN 114608127 A CN114608127 A CN 114608127A
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Prior art keywords
temperature
indoor
temperature difference
indoor unit
throttling component
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CN202210093184.5A
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CN114608127B (en
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鲍洋
黄春
陈东
吉金浩
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/66—Sleep mode
    • 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
    • F24F11/83—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
    • F24F11/88—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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—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
    • F24F2140/20—Heat-exchange fluid temperature
    • 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 provides a control method and a control device for improving noise of an indoor unit and an air conditioner, wherein the method comprises the following steps: if the air conditioner operates in the low noise demand mode, acquiring the operation duration of the low noise mode; determining indoor set temperature according to the running time of the low noise mode; if the temperature difference meets the preset temperature difference condition, adjusting the opening of a throttling component of the indoor unit to enable the refrigerant flowing through the throttling component to be in a single-phase flow state; and if the temperature difference does not meet the preset temperature difference condition, controlling the opening of the throttling component to increase the flow of the refrigerant, and/or controlling the rotating speed of a fan of the indoor unit to increase. According to the embodiment of the invention, different control modes are determined by combining the running time of the air conditioner running in the low noise mode and the deviation between the indoor environment temperature and the indoor set temperature, so that the flowing noise of the refrigerant can be reduced when the air conditioner runs, the indoor thermal environment is considered, and the indoor thermal comfort is ensured.

Description

Control method and device for improving noise of indoor unit and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device for improving noise of an indoor unit and an air conditioner.
Background
The refrigerant in the air conditioner flows in the pipeline, and because the refrigerant has certain flow velocity, certain liquid flow sound exists when the refrigerant passes through all parts of the pipeline and parts connected with the pipeline, and the liquid flow noise is high in some conditions related to the running state of the air conditioner.
If the user desires the air conditioner to run quietly, the liquid flow noise of the indoor unit is high, and the user experience is poor.
Disclosure of Invention
The invention solves the problem that the liquid flow noise of the existing air conditioner is higher, and the use experience of a user is influenced.
In order to solve the above problems, the present invention provides a control method for improving noise of an indoor unit, the method including: if the air conditioner operates in a low noise demand mode, acquiring the operation duration of the low noise mode; determining indoor set temperature according to the running time of the low noise mode; if the temperature difference between the indoor environment temperature and the indoor set temperature meets a preset temperature difference condition, adjusting the opening of a throttling component of the indoor unit to enable the refrigerant flowing through the throttling component to be in a single-phase flow state; the preset temperature difference condition is less than or equal to a preset threshold value; and if the temperature difference between the indoor environment temperature and the indoor set temperature does not meet the preset temperature difference condition, controlling the opening of the throttling component to increase the refrigerant flow, and/or controlling the rotating speed of a fan of the indoor unit to increase.
According to the embodiment of the invention, different control modes are determined by combining the running time of the air conditioner running in the low noise mode and the deviation between the indoor environment temperature and the indoor set temperature, so that the flowing noise of the refrigerant can be reduced when the air conditioner runs, the indoor thermal environment is considered, and the indoor thermal comfort is ensured.
Optionally, if the air conditioner performs a cooling operation, if a temperature difference between an indoor ambient temperature and the indoor set temperature satisfies a preset temperature difference condition, adjusting an opening degree of a throttling component of the indoor unit to enable a refrigerant flowing through the throttling component to be in a single-phase flow state, including: calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods; if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated liquid temperature critical value according to the low pressure of the system; if the inlet pipe temperature of the throttling component is less than the critical value of the saturated liquid temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening; and if the inlet pipe temperature of the throttling component is greater than or equal to the critical value of the saturated liquid temperature, controlling the opening degree of the throttling component of the indoor unit to be reduced until the opening degree of the throttling component reaches the minimum opening degree or the inlet pipe temperature is less than the critical value of the saturated liquid temperature.
In the embodiment of the invention, under the refrigeration mode, the opening of the throttling component is adjusted based on the size relation between the inlet pipe temperature of the throttling component and the critical value of the saturated liquid temperature, so that the refrigerant flowing through the throttling component is in a single-phase flow state, the problem of liquid flow sound amplification caused by two-phase flow can be effectively avoided, and the indoor sound environment is improved.
Optionally, if the air conditioner is in a heating operation, if a temperature difference between an indoor ambient temperature and the indoor set temperature satisfies a preset temperature difference condition, adjusting an opening degree of a throttling component of the indoor unit to enable a refrigerant flowing through the throttling component to be in a single-phase flow state, including: calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods; if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated gas temperature critical value according to the high pressure of the system; if the inlet pipe temperature of the throttling component is greater than the critical value of the saturated gas temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening; and if the inlet pipe temperature of the throttling component is less than or equal to the critical value of the saturated gas temperature, controlling the opening degree of the throttling component of the indoor unit to increase until the opening degree of the throttling component reaches the maximum opening degree or the inlet pipe temperature is greater than the critical value of the saturated gas temperature.
In the embodiment of the invention, under the heating mode, the opening degree of the throttling component is adjusted based on the size relation between the inlet pipe temperature of the throttling component and the critical value of the saturated gas temperature, so that the refrigerant flowing through the throttling component is in a single-phase flow state, the problem of liquid flow sound amplification caused by two-phase flow can be effectively avoided, and the indoor sound environment is improved.
Alternatively, the controlling the opening degree of the throttle member to increase the refrigerant flow rate includes: and controlling the opening of the throttling component according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to increase the flow of the refrigerant.
The embodiment of the invention provides a feasible way for improving the refrigerating/heating capacity under the condition that the thermal environment requirement of a user is not met, thereby ensuring the thermal comfort.
Optionally, if the air conditioner operates in a cooling mode, the indoor set temperature is positively correlated with the operating duration, and if the air conditioner operates in a heating mode, the indoor set temperature is negatively correlated with the operating duration.
According to the embodiment of the invention, after the air conditioner enters the low noise demand mode, the indoor set temperature is changed according to the running time, so that frequent actions of the internal machine valve are prevented, and the noise is reduced.
Alternatively, if the air conditioner is operated in the low noise demand mode, the oil return mode operation is prohibited.
According to the embodiment of the invention, the refrigerant flowing noise generated by oil return can be prevented by shielding the oil return mode.
Optionally, before adjusting an opening degree of a throttling element of the indoor unit to make a refrigerant flowing through the throttling element in a single-phase flow state, the method further includes: and determining the saturated gas temperature critical value and the saturated liquid temperature critical value of the refrigerant under different pressures according to the pressure-enthalpy diagram of the refrigerant.
According to the embodiment of the invention, the basis for judging whether the opening degree is controlled is provided by recording the critical value of the saturated gas temperature and the critical value of the saturated liquid temperature of the refrigerant under different pressures, so that the flowing noise of the refrigerant during the operation of the air conditioner can be reduced, the indoor thermal environment is considered, and the indoor thermal comfort is ensured.
Optionally, the low noise demand mode is a sleep mode or a mute mode.
The embodiment of the invention provides a possible mode of a low-noise demand mode, and accurately reflects the low-noise operation demand of the air conditioner of a user.
The invention provides a control device for improving noise of an indoor unit, which comprises: the running time acquiring module is used for acquiring the running time of the low noise mode if the air conditioner runs in the low noise demand mode; the set temperature determining module is used for determining indoor set temperature according to the running time of the low noise mode; the first adjusting module is used for adjusting the opening of a throttling component of the indoor unit to enable a refrigerant flowing through the throttling component to be in a single-phase flow state if the temperature difference between the indoor environment temperature and the indoor set temperature meets a preset temperature difference condition; the preset temperature difference condition is less than or equal to a preset threshold value; and the second adjusting module is used for controlling the opening of the throttling component to increase the flow of the refrigerant and/or controlling the rotating speed of a fan of the indoor unit to increase if the temperature difference between the indoor environment temperature and the indoor set temperature does not meet the preset temperature difference condition.
An embodiment of the present invention provides an air conditioner, including a computer-readable storage medium storing a computer program and a processor, where the computer program is read by the processor and executed to implement the above method.
An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the computer program implements the method.
The control device for improving the noise of the indoor unit, the air conditioner and the computer readable storage medium can achieve the same technical effects as the control method for improving the noise of the indoor unit.
Drawings
FIG. 1 is a schematic flow chart of a control method for improving noise of an indoor unit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control device for improving noise of an indoor unit according to an embodiment of the present invention.
Description of reference numerals:
201-running duration obtaining module; 202-set temperature determination module; 203-a first conditioning module; 204-a second adjustment module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
For an indoor unit of a multi-connected air conditioner, if a refrigerant passes through an electronic expansion valve of the indoor unit and is in a two-phase flow (a gas phase and a liquid phase), liquid flow sound is amplified, and a noise problem affecting user experience is caused. The embodiment of the invention provides a control method for improving the noise of an indoor unit, which selects different control modes by combining the running time of a low-noise demand mode and the deviation of the indoor environment temperature and a set value, thereby reducing the flowing noise of an air conditioner refrigerant, stabilizing the indoor environment temperature and ensuring the indoor thermal comfort.
In order to reduce the flow noise of the refrigerant passing through the electronic expansion valve, different control methods are distinguished to improve the reliability, namely: the indoor environment temperature is in a certain range of the set value of the air conditioner, the flowing noise is reduced by controlling according to the mode A, the rest are controlled according to the mode B, the requirement on the air conditioning capacity is high, and the thermal comfort is preferentially ensured.
The method can be realized by using the existing product, can improve the noise of the air conditioner when falling asleep, increase the running time, improve the indoor thermal comfort and does not influence the rapid cooling and rapid heating functions of the air conditioner.
The air conditioner is provided with a high-pressure sensor and a low-pressure sensor for detecting the system pressure, the indoor unit is provided with an outlet pipe temperature sensor and a room temperature sensor, and the front and the rear of the electronic expansion valve are respectively provided with a temperature sensor for detecting the pipe temperature and the indoor environment temperature of each indoor unit.
Fig. 1 is a schematic flow chart of a control method for improving noise of an indoor unit according to an embodiment of the present invention, where the method includes the following steps:
and S102, if the air conditioner operates in the low noise demand mode, acquiring the operation duration of the low noise mode.
The low noise demand mode is a sleep mode or a silent mode and other modes in which the user needs the low noise operation of the air conditioner. After the air conditioner enters the low-noise demand mode, the continuous operation time of the air conditioner in the mode is obtained, so that the indoor set temperature is changed according to the operation time, and the influence on the acoustic environment caused by frequent action of an internal machine valve is prevented.
And S104, determining the indoor set temperature according to the running time of the low noise mode.
If the air conditioner operates in a refrigerating mode, the indoor set temperature is positively correlated with the operating duration, and the larger the operating duration is, the higher the indoor set temperature is; if the air conditioner is in heating operation, the indoor set temperature is in negative correlation with the operation time length, and the indoor set temperature is relatively lower when the operation time length is longer. Through the arrangement mode, frequent actions of the internal machine valve can be prevented, and noise is reduced.
And S106, if the temperature difference between the indoor environment temperature and the indoor set temperature meets a preset temperature difference condition, adjusting the opening of the throttling component of the indoor unit to enable the refrigerant flowing through the throttling component to be in a single-phase flow state.
The preset temperature difference condition is smaller than or equal to a preset threshold value, namely the difference between the current environment temperature and the indoor set temperature (representing the user requirement) is smaller, the thermal environment requirement of the user is basically met, and the side in this case is more important than noise reduction. Under the condition of meeting the preset temperature difference condition, the opening degree of the throttling component is adjusted to enable the refrigerant flowing through the throttling component to be in a single-phase flow state, so that the problem of liquid flow sound amplification caused by two-phase flow can be effectively avoided, and the indoor sound environment is improved.
If the air conditioner is in refrigeration operation, the preset temperature difference condition is smaller than or equal to a first preset threshold, and if the air conditioner is in heating operation, the preset temperature difference condition is smaller than or equal to a second preset threshold, wherein the first preset threshold and the second preset threshold can be the same or different. Illustratively, the throttling element may be an electronic expansion valve.
And S108, if the temperature difference between the indoor environment temperature and the indoor set temperature does not meet the preset temperature difference condition, controlling the opening of the throttling component to increase the refrigerant flow and/or controlling the rotating speed of a fan of the indoor unit to increase.
Under the condition that the preset temperature difference condition is not met, the difference between the current environment temperature and the indoor set temperature (representing the user requirement) is large, the thermal environment requirement of the user is not met, the air conditioning capacity requirement is large, and the side in the condition is heavier than refrigeration/heating. Specifically, the flow rate of the refrigerant can be controlled to be increased, and/or the rotating speed of the fan is controlled to be increased, the refrigerating/heating capacity is improved by increasing the air volume and the flow rate of the refrigerant, and the thermal comfort is ensured.
For example, the opening degree of the throttling component can be controlled according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit so as to increase the refrigerant flow rate.
According to the control method for improving the noise of the indoor unit, provided by the embodiment of the invention, different control modes are determined by combining the running time of the air conditioner running in the low noise mode and the deviation between the indoor environment temperature and the indoor set temperature, so that the flowing noise of the refrigerant can be reduced when the air conditioner runs, the indoor thermal environment is considered, and the indoor thermal comfort is ensured.
If the air conditioner is in a cooling operation, the step S106 may be executed as follows:
(1) and calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods. For example, the temperature difference between the indoor environment temperature and the indoor set temperature is calculated in each period, and then the average temperature difference is obtained by averaging the temperature differences.
(2) And if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated liquid temperature critical value according to the low pressure of the system. The system is pre-written with a pressure-enthalpy critical table determined by a refrigerant pressure-enthalpy diagram, and the saturated gas temperature critical value and the saturated liquid temperature critical value of the refrigerant under different pressures are recorded. And in the process of refrigerating operation, the low-pressure of the system is adopted to obtain the corresponding saturated liquid temperature critical value. When the temperature of the inlet pipe behind the valve is less than the critical value of the temperature of the saturated liquid, the liquid is in a pure liquid state, otherwise, the liquid is in a gas-liquid two-phase flow.
(3) And if the inlet pipe temperature of the throttling component is less than the critical value of the saturated liquid temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening. The liquid state is pure at the moment, the noise is low, and extra control is not needed.
(4) And if the inlet pipe temperature of the throttling component is greater than or equal to the critical value of the saturated liquid temperature, controlling the opening degree of the throttling component of the indoor unit to be reduced until the opening degree of the throttling component reaches the minimum opening degree or the inlet pipe temperature is less than the critical value of the saturated liquid temperature. For example, a single opening degree change value of the throttling component is set, and the single opening degree change value is gradually reduced on the basis of the current opening degree until the current opening degree is the minimum opening degree or the inlet pipe temperature is smaller than the saturated liquid temperature critical value.
If the air conditioner is operated to perform heating, the step S106 may be performed as follows:
(1) and calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods. Similar to the calculation process of the cooling operation, it is not described herein again.
(2) And if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated gas temperature critical value according to the high pressure of the system. The system is pre-written with a pressure-enthalpy critical table determined by a refrigerant pressure-enthalpy diagram, and the saturated gas temperature critical value and the saturated liquid temperature critical value of the refrigerant under different pressures are recorded. And in the heating operation process, the high-pressure of the system is adopted to obtain the corresponding critical value of the saturated gas temperature. When the temperature of the inlet pipe in front of the valve is larger than the critical value of the saturated gas temperature, the state is a pure gas state, otherwise, the state is a gas-liquid two-phase flow;
(3) and if the inlet pipe temperature of the throttling component is greater than the critical value of the saturated gas temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening. The air is in a pure air state at the moment, the noise is low, and extra control is not needed.
(4) And if the inlet pipe temperature of the throttling component is less than or equal to the critical value of the saturated gas temperature, controlling the opening degree of the throttling component of the indoor unit to increase until the opening degree of the throttling component reaches the maximum opening degree or the inlet pipe temperature is greater than the critical value of the saturated gas temperature. For example, a single opening degree change value of the throttling component is set, and the single opening degree change value is gradually increased on the basis of the current opening degree until the current opening degree is the maximum opening degree or the inlet pipe temperature is larger than the saturated liquid temperature critical value.
Considering that the saturated gas temperature threshold value and the saturated liquid temperature threshold value are used as the basis for judging whether to perform the opening degree control in the control process of the opening degree of the throttling part, the method can further comprise the following steps before S106: and determining the saturated gas temperature critical value and the saturated liquid temperature critical value of the refrigerant under different pressures according to the pressure-enthalpy diagram of the refrigerant. The method comprises the steps of forming a pressure-enthalpy critical table based on a refrigerant pressure-enthalpy diagram, and recording a refrigerant saturated gas temperature critical value and a saturated liquid temperature critical value under different pressures.
Considering that the oil return mode of the air conditioner generates a large refrigerant flow noise, if the air conditioner is operated in the low noise demand mode, the oil return mode operation is prohibited. By shielding the oil return mode, the refrigerant flow noise generated by oil return can be prevented.
The above method of the present embodiment is described by taking the example of the user setting the sleep mode.
When the user sets the sleep mode, the indoor set temperature T can be changed according to the running time length HsetThe frequent action of the internal valve is prevented from influencing the acoustic environment, and the following examples are given:
Figure BDA0003489894650000081
by detecting the ambient indoor temperature TaoAnd indoor set temperature TsetThe opening degree of the expansion valve of the internal machine is controlled by the difference value, so that the expansion valve of the internal machine is expandedThe refrigerant of the expansion valve is in single-phase flow, so that the indoor sound environment is improved.
Firstly, according to the refrigerant pressure-enthalpy diagram, forming a pressure-enthalpy critical table, and recording the temperature critical value T of the saturated gas and the saturated liquid of the refrigerant under different pressureslin. In the cooling mode, the temperature T of the inlet pipe after the valveru＜TlinWhen the flow is in a pure liquid state, otherwise, the flow is a gas-liquid two-phase flow; in heating mode, when the temperature T of the inlet pipe before the valveru＞TlinWhen the flow is in a pure gas state, otherwise, the flow is in a gas-liquid two-phase flow.
Secondly, when the temperature difference T between the indoor environment temperature and the indoor set temperatureao-TsetT1 (refrigeration, generally at 2 ℃) or Tset-TaoT2 (heating, generally 3 ℃), controlling according to A mode, and immediately exiting when the condition is not met. And under other conditions, the control is carried out according to the mode B, so that the indoor thermal comfort is not influenced.
After the sleep mode is started, the oil return mode is shielded; the inner fan is adjusted to be in a low wind gear; and calculating the temperature difference delta T between the indoor environment temperature and the indoor set temperature as Tao-Tset in each detection period delta T.
Optionally, the control mode of A is as follows:
(1) calculating the average temperature difference of n continuous periods
Figure BDA0003489894650000082
When in use
Figure BDA0003489894650000083
(refrigeration) or
Figure BDA0003489894650000084
(heating) and enters a control mode A.
(2) According to a pre-written pressure-enthalpy critical table and the low pressure P of the systemd(refrigeration mode) or high pressure Pg(heating mode) obtaining the threshold value T in this statelin. In the cooling mode, when Tru＜TlinWhen T, the current valve opening is maintained unchanged, and when Tru≥TlinThen, the valve opening P is equal to P-1 until Tru＜TlinOr P60 (minimum opening degree)) (ii) a In heating mode, when Tru＞TlinWhen T, the current valve opening is maintained unchanged, and when Tru≤TlinThen, the valve opening P is P +1 until Tru＞TlinOr P is 480 (maximum opening).
For example: when the refrigerator runs, the low pressure is 8.32Bar, the T _ lin is 5 ℃, and after the sleep mode is started, the opening degree of an internal machine valve is controlled, so that T \u \ruAnd the temperature is less than 5 ℃, so that the liquid flowing through the inner machine is pure liquid.
Optionally, the B control mode is as follows:
(1) calculating the average temperature difference of n continuous periods
Figure BDA0003489894650000091
When in use
Figure BDA0003489894650000092
(refrigeration) or
Figure BDA0003489894650000093
And (heating) and entering a B control mode, wherein the deviation between the set temperature and the indoor temperature is large (the temperature in the refrigerating room is higher and the temperature in the heating room is lower), and the air volume and the refrigerant flow are properly increased to ensure the thermal comfort.
(2) At the moment, the rotating speed of the fan is adjusted to be a medium wind gear, and the opening degree of the valve is controlled according to the pipe temperature of the inlet pipe and the outlet pipe of the indoor unit.
The control method for improving the noise of the indoor unit, provided by the embodiment, can be realized by using the existing product, can improve the air-conditioning noise when falling asleep, increase the operation time and improve the indoor thermal comfort.
Fig. 2 is a schematic structural diagram of a control device for improving noise of an indoor unit according to an embodiment of the present invention, where the device includes:
an operation duration obtaining module 201, configured to obtain an operation duration of a low noise mode if the air conditioner operates in the low noise demand mode;
a set temperature determination module 202, configured to determine an indoor set temperature according to the operation duration of the low noise mode;
the first adjusting module 203 is configured to adjust an opening degree of a throttling component of the indoor unit to enable a refrigerant flowing through the throttling component to be in a single-phase flow state if a temperature difference between an indoor environment temperature and the indoor set temperature meets a preset temperature difference condition; the preset temperature difference condition is less than or equal to a preset threshold value;
and the second adjusting module 204 is configured to control the opening of the throttling component to increase the refrigerant flow and/or control the fan speed of the indoor unit to increase if the temperature difference between the indoor environment temperature and the indoor set temperature does not satisfy a preset temperature difference condition.
According to the control device for improving the noise of the indoor unit, provided by the embodiment of the invention, different control modes are determined by combining the running time of the air conditioner running in the low noise mode and the deviation between the indoor environment temperature and the indoor set temperature, so that the flowing noise of a refrigerant can be reduced during the running of the air conditioner, the indoor thermal environment is considered, and the indoor thermal comfort is ensured.
Optionally, if the air conditioner performs cooling operation, the first adjusting module 203 is specifically configured to: calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods; if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated liquid temperature critical value according to the low pressure of the system; if the inlet pipe temperature of the throttling component is less than the critical value of the saturated liquid temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening; and if the inlet pipe temperature of the throttling component is greater than or equal to the critical value of the saturated liquid temperature, controlling the opening degree of the throttling component of the indoor unit to be reduced until the opening degree of the throttling component reaches the minimum opening degree or the inlet pipe temperature is less than the critical value of the saturated liquid temperature.
Optionally, if the air conditioner is operated to generate heat, the first adjusting module 203 is specifically configured to: calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods; if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated gas temperature critical value according to the high pressure of the system; if the inlet pipe temperature of the throttling component is greater than the critical value of the saturated gas temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening; and if the inlet pipe temperature of the throttling component is less than or equal to the critical value of the saturated gas temperature, controlling the opening degree of the throttling component of the indoor unit to increase until the opening degree of the throttling component reaches the maximum opening degree or the inlet pipe temperature is greater than the critical value of the saturated gas temperature.
Optionally, the second adjusting module 204 is specifically configured to: and controlling the opening of the throttling component according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to increase the flow of the refrigerant.
Optionally, if the air conditioner operates in a cooling mode, the indoor set temperature is positively correlated with the operating duration, and if the air conditioner operates in a heating mode, the indoor set temperature is negatively correlated with the operating duration.
Alternatively, if the air conditioner is operated in the low noise demand mode, the oil return mode operation is prohibited.
Optionally, the apparatus further comprises a threshold determination module configured to: and determining the saturated gas temperature critical value and the saturated liquid temperature critical value of the refrigerant under different pressures according to the pressure-enthalpy diagram of the refrigerant.
Optionally, the low noise demand mode is a sleep mode or a mute mode.
An embodiment of the present invention provides an air conditioner, including a computer-readable storage medium storing a computer program and a processor, where the computer program is read by the processor and executed to implement the above method.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read and executed by a processor, the method provided in the foregoing embodiment is implemented, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The energy-saving control device for the water pump of the central air conditioner and the central air conditioner disclosed by the embodiment correspond to the energy-saving control method for the water pump of the central air conditioner disclosed by the embodiment, so that the description is relatively simple, and relevant points can be referred to the description of the method part.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (11)

1. A control method for improving noise of an indoor unit is characterized by comprising the following steps:
if the air conditioner operates in a low noise demand mode, acquiring the operation duration of the low noise mode;
determining indoor set temperature according to the running time of the low noise mode;
if the temperature difference between the indoor environment temperature and the indoor set temperature meets a preset temperature difference condition, adjusting the opening of a throttling component of the indoor unit to enable the refrigerant flowing through the throttling component to be in a single-phase flow state; the preset temperature difference condition is less than or equal to a preset threshold value;
and if the temperature difference between the indoor environment temperature and the indoor set temperature does not meet the preset temperature difference condition, controlling the opening of the throttling component to increase the refrigerant flow, and/or controlling the rotating speed of a fan of the indoor unit to increase.
2. The method as claimed in claim 1, wherein if the air conditioner is operated in a cooling mode, if the temperature difference between the indoor ambient temperature and the indoor set temperature satisfies a preset temperature difference condition, adjusting the opening degree of the throttling element of the indoor unit to make the refrigerant flowing through the throttling element be in a single-phase flow state, includes:
calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods;
if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated liquid temperature critical value according to the low pressure of the system;
if the inlet pipe temperature of the throttling component is less than the critical value of the saturated liquid temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening;
and if the inlet pipe temperature of the throttling component is greater than or equal to the critical value of the saturated liquid temperature, controlling the opening degree of the throttling component of the indoor unit to be reduced until the opening degree of the throttling component reaches the minimum opening degree or the inlet pipe temperature is less than the critical value of the saturated liquid temperature.
3. The method as claimed in claim 1, wherein if the air conditioner is in a heating operation, if the temperature difference between the indoor ambient temperature and the indoor set temperature satisfies a preset temperature difference condition, adjusting the opening degree of the throttling element of the indoor unit to make the refrigerant flowing through the throttling element in a single-phase flow state comprises:
calculating the average temperature difference between the indoor environment temperature and the indoor set temperature in a plurality of continuous periods;
if the average temperature difference meets the preset temperature difference condition, determining a corresponding saturated gas temperature critical value according to the high pressure of the system;
if the inlet pipe temperature of the throttling component is greater than the critical value of the saturated gas temperature, controlling the throttling component of the indoor unit to continuously operate at the current opening;
and if the inlet pipe temperature of the throttling component is less than or equal to the critical value of the saturated gas temperature, controlling the opening degree of the throttling component of the indoor unit to increase until the opening degree of the throttling component reaches the maximum opening degree or the inlet pipe temperature is greater than the critical value of the saturated gas temperature.
4. The method according to any one of claims 1 to 3, wherein the controlling the opening degree of the throttle member to increase the refrigerant flow rate comprises:
and controlling the opening of the throttling component according to the inlet pipe temperature and the outlet pipe temperature of the indoor unit to increase the flow of the refrigerant.
5. The method according to any one of claims 1 to 3, wherein the indoor set temperature is positively correlated with the operation time period if air-conditioning cooling operation is performed, and the indoor set temperature is negatively correlated with the operation time period if air-conditioning heating operation is performed.
6. A method according to any one of claims 1 to 3, wherein if the air conditioner is operating in the low noise demand mode, then the oil return mode operation is inhibited.
7. The method as claimed in any one of claims 1 to 3, wherein before the opening degree of the throttling part of the indoor unit is adjusted to make the refrigerant flowing through the throttling part in a single-phase flow state, the method further comprises:
and determining the saturated gas temperature critical value and the saturated liquid temperature critical value of the refrigerant under different pressures according to the pressure-enthalpy diagram of the refrigerant.
8. The method of any of claims 1-3, wherein the low noise demand mode is a sleep mode or a silent mode.
9. A control device for improving noise of an indoor unit, the device comprising:
the running time acquiring module is used for acquiring the running time of the low noise mode if the air conditioner runs in the low noise demand mode;
the set temperature determining module is used for determining indoor set temperature according to the running time of the low noise mode;
the first adjusting module is used for adjusting the opening of a throttling component of the indoor unit to enable a refrigerant flowing through the throttling component to be in a single-phase flow state if the temperature difference between the indoor environment temperature and the indoor set temperature meets a preset temperature difference condition; the preset temperature difference condition is less than or equal to a preset threshold value;
and the second adjusting module is used for controlling the opening of the throttling component to increase the flow of the refrigerant and/or controlling the rotating speed of a fan of the indoor unit to increase if the temperature difference between the indoor environment temperature and the indoor set temperature does not meet the preset temperature difference condition.
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method according to any one of claims 1 to 8.
11. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-8.
CN202210093184.5A 2022-01-26 2022-01-26 Control method and device for improving noise of indoor unit and air conditioner Active CN114608127B (en)

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