CN111536653B - Noise control method and device, multi-split air conditioning system and storage medium - Google Patents

Noise control method and device, multi-split air conditioning system and storage medium Download PDF

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Publication number
CN111536653B
CN111536653B CN202010422027.5A CN202010422027A CN111536653B CN 111536653 B CN111536653 B CN 111536653B CN 202010422027 A CN202010422027 A CN 202010422027A CN 111536653 B CN111536653 B CN 111536653B
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opening degree
expansion valve
conditioning system
split air
polytropic exponent
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CN111536653A (en
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黄春
陈东
吉金浩
鲍洋
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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
    • 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
    • F24F11/72—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
    • F24F2140/40—Damper positions, e.g. open or closed
    • 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 noise control method and device, a multi-split air-conditioning system and a storage medium, and relates to the technical field of air conditioners, wherein when the multi-split air-conditioning system is in heating operation, operation data of a compressor is acquired according to a preset time interval, and the current adiabatic polytropic index of the multi-split air-conditioning system is calculated through the operation data; if the current adiabatic polytropic index is greater than or equal to the ideal adiabatic polytropic index, the flowing refrigerant in the multi-split air-conditioning system is insufficient, and if the expansion valve of the warm stop indoor unit is in the first opening degree, the fan of the warm stop indoor unit is adjusted to be closed from the low-wind gear operation, and the expansion valve of the warm stop indoor unit is increased to the second opening degree from the first opening degree, so that the flowing refrigerant in the multi-split air-conditioning system is supplemented, and the heating reliability of the multi-split air-conditioning system is ensured. Therefore, the noise is reduced, and the heating effect of the multi-split air conditioning system is ensured.

Description

Noise control method and device, multi-split air conditioning system and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a noise control method and device, a multi-split air conditioning system and a storage medium.
Background
At present, when a multi-split air conditioning system heats, in order to avoid the refrigerant accumulation of the warm shutdown indoor unit, an expansion valve of the warm shutdown indoor unit is always kept at a certain opening degree, so that refrigerant sound is often transmitted out when the warm shutdown indoor unit is not operated, and user experience is influenced.
In order to solve the problem, an expansion valve of the warm stop internal unit is usually turned off or even closed, so that the warm stop internal unit can emit very small refrigerant sound or even mute. However, this may cause insufficient refrigerant to flow in the multi-split air conditioning system, and may affect the heating effect of the multi-split air conditioning system.
Disclosure of Invention
The invention solves the problem of how to ensure the heating effect of the multi-split air conditioning system while reducing the noise.
In order to solve the above problems, the present invention provides a noise control method applied to a multi-split air conditioning system, where the multi-split air conditioning system includes a plurality of internal machines, and the noise control method includes: when the multi-split air conditioning system is in heating operation, acquiring operation data of a compressor according to a preset time interval; calculating the current adiabatic polytropic exponent of the multi-split air conditioning system according to the operation data; detecting the opening degree of a first expansion valve of a temperature-to-temperature shutdown indoor unit in the plurality of indoor units; when the current adiabatic polytropic exponent is greater than or equal to an ideal adiabatic polytropic exponent and the first expansion valve is at a first opening degree, the fan of the warm shutdown indoor unit is adjusted to be closed from low-wind-gear operation, and the first expansion valve is increased to a second opening degree from the first opening degree.
Compared with the prior art, the noise control method has the following advantages: in the heating operation process of the multi-split air conditioning system, when an internal unit is stopped at a temperature, a fan of the internal unit at the temperature is controlled to operate at a low wind level, and an expansion valve of the internal unit at the temperature is opened to a first smaller opening degree, so that the flowing sound of a refrigerant of the internal unit at the temperature is very small; meanwhile, acquiring operation data of the compressor according to a preset time interval, and calculating the current adiabatic polytropic index of the multi-split air-conditioning system according to the operation data; if the current adiabatic polytropic index is greater than or equal to the ideal adiabatic polytropic index, the flowing refrigerant in the multi-split air-conditioning system is insufficient, and if the expansion valve of the warm stop indoor unit is in the first opening degree, the fan of the warm stop indoor unit is adjusted to be closed from the low-wind gear operation, and the expansion valve of the warm stop indoor unit is increased to the second opening degree from the first opening degree, so that the flowing refrigerant in the multi-split air-conditioning system is supplemented, and the heating reliability of the multi-split air-conditioning system is ensured. Namely, the invention can reduce noise and ensure the heating effect of the multi-split air conditioning system.
Further, the noise control method further includes: when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is in the first opening degree, the fan is kept running at a low wind level and the first expansion valve is kept at the first opening degree.
Further, the operational data includes discharge temperature, suction temperature, discharge pressure, and suction pressure; the step of calculating the current adiabatic polytropic exponent of the multi-split air conditioning system according to the operation data comprises the following steps: according to the exhaust temperature, the suction temperature, the exhaust pressure and the suction pressure, according to a preset formula:
Figure BDA0002497308390000021
calculating the current adiabatic polytropic exponent, wherein n represents the current adiabatic polytropic exponent, T2 represents the exhaust temperature, T1 represents the intake temperature, P2 represents the exhaust pressure, and P1 represents the intake pressure.
Further, the noise control method further includes: when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is in the second opening degree, the fan is adjusted to low-wind-gear operation from closing, and the first expansion valve is reduced to the first opening degree from the second opening degree.
Further, the noise control method further includes: detecting the opening degree of a second expansion valve of a shutdown internal machine in the plurality of internal machines; increasing the second expansion valve from the first opening degree to the second opening degree when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the second expansion valve is at the first opening degree; and when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the second expansion valve is at the first opening degree, keeping the second expansion valve at the first opening degree.
Further, the noise control method further includes: and when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the second expansion valve is at the second opening degree, reducing the second expansion valve from the second opening degree to the first opening degree.
Further, the preset time interval is 2-4 min; the ideal adiabatic polytropic exponent is 1.15-1.4.
The invention also provides a noise control device, which is applied to a multi-split air conditioning system, wherein the multi-split air conditioning system comprises a plurality of indoor units, and the noise control device comprises: the acquisition module is used for acquiring the operation data of the compressor according to a preset time interval when the multi-split air-conditioning system is in heating operation; the calculation module is used for calculating the current adiabatic polytropic exponent of the multi-split air conditioning system according to the operation data; the detection module is used for detecting the opening degree of a first expansion valve of the shutdown indoor unit from the plurality of indoor units to the temperature; and the execution module is used for adjusting the fan of the warm shutdown internal machine to be closed from low wind gear operation and increasing the first expansion valve to a second opening degree from the first opening degree when the current adiabatic polytropic exponent is greater than or equal to an ideal adiabatic polytropic exponent and the first expansion valve is in the first opening degree.
The invention also provides a multi-split air conditioning system, which comprises a plurality of internal machines; the multi-split air conditioning system further includes: one or more processors; a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the noise control method described above.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the noise control method described above.
Drawings
Fig. 1 is a block diagram illustrating a multi-split air conditioning system according to the present invention.
Fig. 2 is a schematic flow chart of a noise control method according to the present invention.
Figure 3 is an exemplary graph of a pressure-enthalpy diagram.
Fig. 4 is another schematic flow chart of the noise control method according to the present invention.
Fig. 5 is another schematic flow chart of the noise control method according to the present invention.
Fig. 6 is an exemplary diagram of an application of the noise control method according to the present invention.
Fig. 7 is a schematic diagram of functional modules of the noise control device according to the present invention.
Description of reference numerals:
10-a multi-split air conditioning system; 11-a processor; 12-a memory; 13-inner machine; 100-noise control means; 110-an obtaining module; 120-a calculation module; 130-a detection module; 140-execution 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.
Referring to fig. 1, fig. 1 is a block schematic diagram of a multi-split air conditioning system 10 according to the present invention, where the multi-split air conditioning system 10 includes a processor 11, a memory 12, and a plurality of internal units 13, and the processor 11 is electrically connected to the memory 12 and the plurality of internal units 13.
The memory 12 is used to store a program such as the noise control device 100 shown in fig. 6. The noise control apparatus 100 includes at least one software function module that may be stored in the memory 12 in the form of software or firmware or solidified in an Operating System (OS) of the multi-split air conditioning system 10. After receiving the execution instruction, the processor 11 executes the program to implement the noise control method disclosed in the present invention.
The processor 11 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the noise control method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 11. The Processor 11 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
On the basis of the multi-split air conditioning system 10 shown in fig. 1, a possible implementation manner of a noise control method is given below, specifically, fig. 2 is a schematic flow chart of the noise control method provided by the present invention, and please refer to fig. 2, the noise control method may include:
and S101, when the multi-split air conditioning system is in heating operation, acquiring operation data of the compressor according to a preset time interval.
In the present embodiment, the multi-split air conditioning system 10 has a plurality of internal units 13 used in parallel, and when the multi-split air conditioning system 10 is in heating operation, a partial internal unit 13 warm-up shutdown may occur. That is, in the heating mode, a part of the internal machines 13 is in the normal operation state, and a part of the internal machines 13 is in the warm stop state.
In order to avoid the accumulation of the refrigerant in the internal unit of the warm stop, the expansion valve of the internal unit of the warm stop can keep a certain opening degree, but the refrigerant in the heating mode is generally in a gas-liquid two-phase state before reaching the expansion valve of the internal unit 13, the refrigerant in the gas-liquid two-phase state contains a large amount of bubbles, when the refrigerant in the gas-liquid two-phase state passes through the expansion valve of the internal unit 13, the large bubbles are crushed to generate a squeak sound, and the rest of the refrigerant in the gas-liquid two-phase state collides with the expansion valve of the internal unit 13 to rebound, so that the gurgling sound is caused, and.
Therefore, in the heating operation process of the multi-split air conditioning system 10, when the inner unit 13 is stopped to warm, the fan of the inner unit which is stopped to warm is controlled to operate at a low wind level, and the expansion valve of the inner unit which is stopped to warm is opened to a first smaller opening degree, so that the flowing sound of the refrigerant of the inner unit which is stopped to warm is very small.
Meanwhile, if the expansion valve of the warm-up shutdown indoor unit is always in a small opening degree, insufficient flowing refrigerant in the multi-split air conditioning system 10 may be caused, and the heating effect of the multi-split air conditioning system 10 may be affected. Therefore, the operation data of the compressor may be acquired at regular intervals, that is, at preset time intervals (for example, 3min), and it is determined whether the flowing refrigerant in the multi-split air-conditioning system 10 is insufficient through the operation data, and if the flowing refrigerant in the multi-split air-conditioning system 10 is insufficient, the expansion valve of the warm-stop indoor unit is slightly opened to supplement the flowing refrigerant in the multi-split air-conditioning system 10, and the expansion valve of the warm-stop indoor unit is closed again until the amount of the flowing refrigerant in the system is normal.
Optionally, the preset time interval is 2-4 min, for example, 3 min.
And S102, calculating the current adiabatic polytropic exponent of the multi-split air-conditioning system according to the operation data.
In the present embodiment, the operation data of the compressor refers to data capable of representing the suction state and the discharge state of the compressor, for example, the compressor suction temperature, the compressor discharge temperature, the condenser outlet temperature, the evaporator inlet temperature, and the like.
Referring to fig. 3, fig. 3 shows a pressure-enthalpy diagram, which is a graph of pressure versus enthalpy, with the ordinate of the diagram representing the logarithmic value lnP of absolute pressure (the value represented in the diagram is the absolute value of pressure) and the abscissa of the diagram representing the specific enthalpy value h.
In the pressure-enthalpy diagram, 1 represents a compressor intake air temperature point, 2 represents a compressor discharge air temperature point, 3 represents a condenser outlet temperature, and 4 represents an evaporator inlet temperature. As can be seen from the pressure-enthalpy diagram, the compression process of the refrigerant in the compressor is almost an adiabatic compression process, i.e., a curve from the compressor suction temperature point 1 to the compressor discharge temperature point 2 is an adiabatic compression process. As can be seen from engineering thermodynamics, the process from 1 to 2 in the pressure-enthalpy diagram should satisfy the following two points:
1. p (V) of ideal gasn) Is a certain value, wherein P represents gas pressure, V represents gas volume, and n represents adiabatic polytropic index;
2、PV＝Rgt, wherein T represents the gas temperature, RgIndicating a gas constant, depending on the gas species.
Thus, from the above two equations, the following conclusions can be derived:
Figure BDA0002497308390000061
is a constant value.
In this embodiment, if the operation data includes the discharge temperature, the suction temperature, the discharge pressure and the suction pressure, and the operation data can be obtained by the pressure sensor and the temperature sensor provided on the compressor, the compression process of the refrigerant in the compressor, i.e. the process from 1 to 2 in the pressure-enthalpy diagram, should satisfy the following formula:
Figure BDA0002497308390000062
wherein T2 represents the exhaust temperature, T1 represents the intake temperature, P2 represents the exhaust pressure, and P1 represents the intake pressure;
further working up the above formula to obtain:
Figure BDA0002497308390000063
further arrangement is carried out, and the obtained exhaust temperature T2, the obtained suction temperature T1, the obtained exhaust pressure P2 and the obtained suction pressure P1 meet the following formula:
Figure BDA0002497308390000064
wherein n is an adiabatic polytropic exponent, which is usually between 1.15 and 1.4.
When the amount of the flowing refrigerant in the multi-split air conditioning system 10 is small, the discharge temperature T2 is high and the suction temperature T1 is low, so that when the amount of the flowing refrigerant in the system is small, T is high2/T1Is large while due to the compression ratio P2/P1If the number of refrigerant flowing in the multi-split air conditioning system 10 is less, the adiabatic polytropic index n will be higher than the ideal adiabatic polytropic index when the multi-split air conditioning system 10 is operating normally.
Therefore, the operation data of the compressor may be acquired at intervals (e.g., 3min), the current adiabatic polytropic exponent of the multi-split air-conditioning system 10 may be calculated according to the operation data, and the current adiabatic polytropic exponent may be compared with the ideal adiabatic polytropic exponent, so as to determine whether the flowing refrigerant in the multi-split air-conditioning system 10 is insufficient.
As an embodiment, the process of calculating the current adiabatic polytropic index of the multi-split air conditioning system 10 according to the operation data may include:
substituting the exhaust temperature T2, intake temperature T1, exhaust pressure P2, and intake pressure P1 into the following equation:
Figure BDA0002497308390000071
thus calculating the current adiabatic polytropic exponent n.
As another embodiment, the process of calculating the current adiabatic polytropic exponent of the multi-split air conditioning system 10 according to the operation data may include:
according to the exhaust temperature, the suction temperature, the exhaust pressure and the suction pressure, according to a preset formula:
Figure BDA0002497308390000072
calculating a current adiabatic polytropic exponent, where n represents the current adiabatic polytropic exponent, the predictingThe formula is according to
Figure BDA0002497308390000073
And (4) deducing.
Step S103 detects the opening degree of the first expansion valve of the warm-up stop internal machine among the plurality of internal machines.
In the present embodiment, the opening degree of the first expansion valve refers to the current opening degree of the expansion valve to the warm-stop internal machine. When the multi-split air-conditioning system 10 is in heating operation, the operation data of the compressor is acquired at intervals (for example, 3min), the current adiabatic polytropic index of the multi-split air-conditioning system 10 is calculated according to the operation data, and the current opening degree of the expansion valve of the warm-up shutdown indoor unit in the plurality of indoor units 13 is detected.
And step S104, when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the first expansion valve is at the first opening degree, adjusting the fan of the warm shutdown internal machine to be closed from low wind gear operation, and increasing the first expansion valve from the first opening degree to the second opening degree.
In this embodiment, after the current adiabatic polytropic exponent is calculated, the current adiabatic polytropic exponent may be compared with an ideal adiabatic polytropic exponent, if the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent, it indicates that the refrigerant flowing through the multi-split air-conditioning system 10 is insufficient at this time, and if the first expansion valve is at the first opening degree, the fan of the warm shutdown indoor unit is adjusted to be closed from the low-wind range operation and the first expansion valve is increased from the first opening degree to the second opening degree to increase the refrigerant flow passing through the first expansion valve, so as to supplement the flowing refrigerant in the multi-split air-conditioning system 10, and ensure the heating reliability of the multi-split air-conditioning system 10.
Optionally, the ideal adiabatic polytropic exponent is an ideal adiabatic polytropic exponent when the multi-split air conditioning system 10 operates normally, the preferred value is 1.26, and a user can flexibly adjust the ideal adiabatic polytropic exponent according to actual conditions, and the value range is 1.15-1.4. The ideal adiabatic polytropic exponent may be represented by n 0.
Optionally, the first opening degree and the second opening degree are determined through experiments and actual user experience, and the selection principle is as follows: the first opening degree is as small as possible, so that the refrigerant sound audible by people is very small; the second opening is slightly larger than the second opening, so that a person can hear a large refrigerant sound, but the flowing refrigerant in the multi-split air conditioning system 10 can be supplemented, and the multi-split air conditioning system 10 is ensured not to be in a state of lacking the refrigerant. The first opening degree may be denoted by a and the second opening degree may be denoted by B.
Under a possible situation, the types of the multi-split air-conditioning system 10 are different, the heating capacity is also different, when the fan of the warm shutdown indoor unit runs at a low wind level and the expansion valve is at a smaller first opening degree, the situation that the multi-split air-conditioning system 10 lacks a refrigerant can not occur within a period of time, the running state of the warm shutdown indoor unit is kept unchanged under the situation, the flowing sound of the refrigerant of the warm shutdown indoor unit is continuously small, and the user experience is guaranteed. Therefore, referring to fig. 4, the noise control method provided by the present invention may further include:
and S105, when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is at the first opening degree, keeping the fan running at a low wind gear and keeping the first expansion valve at the first opening degree.
In this embodiment, if the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent, it indicates that the refrigerant flowing in the multi-split air conditioning system 10 is sufficient, and if the first expansion valve is at the first opening degree, the fan can be kept running at a low wind level and the first expansion valve is kept at the first opening degree for the temperature shutdown internal unit, so that the flowing sound of the refrigerant to the temperature shutdown internal unit is continuously small, and the user experience is guaranteed.
In a possible situation, if the fan of the warm shutdown internal machine is adjusted to be closed from a low wind gear operation and the first expansion valve is increased from the first opening degree to the second opening degree, so that after the fan is operated for a period of time, the refrigerant quantity in the multi-split air conditioning system 10 may be recovered to be normal, in this case, the opening degree of the first expansion valve needs to be reduced again, so that the flowing sound of the refrigerant of the warm shutdown internal machine is very small, and the user experience is ensured. Therefore, referring to fig. 4, the noise control method provided by the present invention may further include:
and S106, when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is at the second opening degree, adjusting the fan from closing to low-wind-gear operation, and reducing the first expansion valve from the second opening degree to the first opening degree.
In this embodiment, if the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent, it indicates that the refrigerant flowing in the multi-split air conditioning system 10 is sufficient, and if the first expansion valve is at the second opening degree, the fan can be adjusted to the low wind gear operation from the closed state and the first expansion valve is reduced to the first opening degree from the second opening degree for the warm shutdown internal machine, so as to reduce the refrigerant flow passing through the first expansion valve, so that the flowing sound of the refrigerant of the warm shutdown internal machine is small, and the user experience is ensured.
In one possible scenario, when the multi-split air conditioning system 10 is in heating operation, it may happen that some of the internal machines 13 are turned off. In order to avoid the refrigerant accumulation of the shutdown internal machine, the expansion valve of the shutdown internal machine can be kept at a certain opening degree. For example, when the internal unit 13 is turned off, the expansion valve of the internal unit is opened to the first smaller opening degree, and the flowing sound of the refrigerant of the internal unit is very small. Similarly, if the expansion valve of the shutdown indoor unit is always in a small opening degree, the flowing refrigerant in the multi-split air conditioning system 10 may be insufficient, and the heating effect of the multi-split air conditioning system 10 may be affected. Therefore, referring to fig. 5, the noise control method provided by the present invention may further include:
in step S107, the opening degree of the second expansion valve of the shutdown internal machine among the plurality of internal machines is detected.
In this embodiment, the opening degree of the second expansion valve refers to the current opening degree of the expansion valve of the shutdown internal machine.
And S108, when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the second expansion valve is at the first opening degree, increasing the second expansion valve from the first opening degree to the second opening degree.
In this embodiment, if the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent, it indicates that the refrigerant flowing through the multi-split air-conditioning system 10 is insufficient, and if the second expansion valve is at the first opening degree, the second expansion valve is increased from the first opening degree to the second opening degree to increase the refrigerant flow passing through the second expansion valve, so as to supplement the flowing refrigerant in the multi-split air-conditioning system 10, and ensure the heating reliability of the multi-split air-conditioning system 10.
Step S109, when the current adiabatic polytropic exponent is less than the ideal adiabatic polytropic exponent and the second expansion valve is at the first opening degree, maintaining the second expansion valve at the first opening degree.
In this embodiment, if the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent, it indicates that the refrigerant flowing in the multi-split air conditioning system 10 is sufficient, and if the second expansion valve is at the first opening degree, the second expansion valve can be maintained at the first opening degree for the shutdown internal unit, so that the flowing sound of the refrigerant of the shutdown internal unit is continuously small, and the user experience is ensured.
In a possible situation, if the second expansion valve of the shutdown internal machine is increased from the first opening degree to the second opening degree, and the operation is performed for a period of time, the refrigerant quantity in the multi-split air conditioning system 10 may be recovered to be normal, and in this case, the opening degree of the second expansion valve needs to be reduced again, so that the flowing sound of the refrigerant of the shutdown internal machine is small, and the user experience is ensured. Therefore, the noise control method provided by the invention can further comprise the following steps:
and step S110, when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the second expansion valve is at the second opening degree, reducing the second expansion valve from the second opening degree to the first opening degree.
In this embodiment, if the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent, it indicates that the refrigerant flowing through the multi-split air conditioning system 10 is sufficient, and if the second expansion valve is at the second opening degree, the second expansion valve may be reduced from the second opening degree to the first opening degree for the shutdown internal machine, so as to reduce the refrigerant flow passing through the second expansion valve, so that the refrigerant flowing sound of the shutdown internal machine is small, and user experience is guaranteed.
Further, in order to better explain the embodiment of the present invention, the following describes the noise control method provided by the embodiment by using an application example shown in fig. 6, and as shown in fig. 6, the noise control method provided by the embodiment may include the following processes:
and S1, performing heating operation on the multi-split air conditioning system.
And S2, acquiring the discharge temperature T2, the suction temperature T1, the discharge pressure P2 and the suction pressure P1 of the compressor at intervals of T0. Optionally, the time t0 is 2-4 min, for example, 3 min.
S3, calculating the current adiabatic polytropic exponent of the multi-split air conditioning system
Figure BDA0002497308390000101
And S4, detecting the opening degree of an expansion valve of the warm stop internal machine.
S5, the opening degree of the expansion valve of the shutdown internal machine is detected.
S6, judging whether the current adiabatic polytropic exponent n is larger than or equal to the ideal adiabatic polytropic exponent n 0. If n is larger than or equal to n0, executing steps S7 and S10; if n < n0, steps S8, S9, S11, S12 are performed. Optionally, the value range of n0 is 1.15-1.4, and the preferred value is 1.26.
And S7, if the expansion valve of the warm-up shutdown internal machine is in the opening degree A, turning off the fan of the warm-up shutdown internal machine from a low wind gear, and increasing the expansion valve of the warm-up shutdown internal machine from the opening degree A to the opening degree B.
And S8, if the expansion valve of the warm shutdown inner machine is in the opening degree A, keeping the fan of the warm shutdown inner machine in low-wind-gear operation and keeping the expansion valve of the warm shutdown inner machine in the opening degree A.
And S9, if the expansion valve of the warm shutdown internal machine is in the opening degree B, adjusting the fan of the warm shutdown internal machine from closed to low wind gear, and reducing the expansion valve of the warm shutdown internal machine from the opening degree B to the opening degree A.
S10, if the expansion valve of the internal combustion engine is at the opening degree a, the expansion valve of the internal combustion engine is increased from the opening degree a to the opening degree B.
S11, if the expansion valve of the shutdown internal machine is at the opening degree a, the expansion valve of the shutdown internal machine is kept at the opening degree a.
And S12, if the expansion valve of the internal machine is in the opening degree B, reducing the expansion valve of the internal machine from the opening degree B to the opening degree A.
Compared with the prior art, the embodiment has the following beneficial effects:
firstly, in the heating operation process of the multi-split air conditioning system 10, when an inner unit 13 is stopped at a temperature, a fan of the inner unit at the temperature is controlled to operate at a low wind level, and an expansion valve of the inner unit at the temperature is opened to a smaller opening degree, so that the flowing sound of a refrigerant of the inner unit at the temperature is very small, and the user experience is ensured;
secondly, acquiring operation data of a primary compressor at intervals, namely according to a preset time interval (for example, 3min), judging whether flowing refrigerants in the multi-split air-conditioning system 10 are insufficient or not according to the operation data, slightly opening an expansion valve of the warm shutdown indoor unit to supplement the flowing refrigerants in the multi-split air-conditioning system 10 if the flowing refrigerants in the multi-split air-conditioning system 10 are insufficient, and closing the expansion valve of the warm shutdown indoor unit again when the amount of the flowing refrigerants in the system is recovered to be normal, so that the noise is reduced and the heating effect of the multi-split air-conditioning system 10 is ensured;
thirdly, in the heating operation process of the multi-split air conditioning system 10, when the internal unit 13 is turned off, the expansion valve of the turned-off internal unit is opened to a smaller opening degree, and the flowing sound of the refrigerant of the turned-off internal unit is very small, so that the user experience is further ensured;
fourthly, if the flowing refrigerant in the multi-split air-conditioning system 10 is insufficient, the expansion valve of the shutdown indoor unit is slightly opened to supplement the flowing refrigerant in the multi-split air-conditioning system 10, and when the amount of the flowing refrigerant in the system returns to normal, the expansion valve of the shutdown indoor unit is closed again, so that the noise is reduced, and the heating effect of the multi-split air-conditioning system 10 is further ensured.
In order to perform the corresponding steps in the above-described embodiments and various possible implementations, an implementation of the noise control device is given below. Fig. 7 is a schematic diagram of functional modules of the noise control apparatus 100 according to the present invention. It should be noted that the basic principle and the technical effect of the noise control apparatus 100 described in this embodiment are the same as those of the foregoing method embodiment, and for the sake of brief description, reference may be made to the corresponding contents of the foregoing method embodiment for the parts that are not mentioned in this embodiment. The noise control device 100 is described below with reference to fig. 7, and the noise control device 100 includes: an acquisition module 110, a calculation module 120, a detection module 130, and an execution module 140.
The acquiring module 110 is configured to acquire operation data of the compressor at preset time intervals when the multi-split air conditioning system is in heating operation.
And the calculating module 120 is configured to calculate a current adiabatic polytropic exponent of the multi-split air conditioning system according to the operation data.
The detection module 130 is configured to detect an opening degree of a first expansion valve of a warm-up shutdown indoor unit of the plurality of indoor units.
And the execution module 140 is configured to, when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the first expansion valve is at the first opening degree, adjust the fan of the warm-stop internal machine from a low-wind gear operation to a closed state, and increase the first expansion valve from the first opening degree to the second opening degree.
Optionally, the preset time interval is 2-4 min; the ideal adiabatic polytropic exponent is 1.15-1.4.
Optionally, the execution module 140 is further configured to, when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is at the first opening degree, keep the fan operating at a low wind speed and keep the first expansion valve at the first opening degree.
Optionally, the operational data includes discharge temperature, suction temperature, discharge pressure, and suction pressure; the calculating module 120 is specifically configured to, according to the exhaust temperature, the intake temperature, the exhaust pressure, and the intake pressure, according to a preset formula:
Figure BDA0002497308390000131
a current adiabatic polytropic exponent is calculated, where n represents the current adiabatic polytropic exponent, T2 represents the exhaust temperature, T1 represents the intake temperature, P2 represents the exhaust pressure, and P1 represents the intake pressure.
Optionally, the execution module 140 is further configured to adjust the fan from off to low wind range operation and reduce the first expansion valve from the second opening degree to the first opening degree when the current adiabatic polytropic index is smaller than the ideal adiabatic polytropic index and the first expansion valve is at the second opening degree.
Optionally, the execution module 140 is further configured to detect an opening degree of a second expansion valve of a shutdown internal machine of the multiple internal machines; when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the second expansion valve is at the first opening degree, increasing the second expansion valve from the first opening degree to a second opening degree; and when the current adiabatic polytropic exponent is less than the ideal adiabatic polytropic exponent and the second expansion valve is at the first opening degree, keeping the second expansion valve at the first opening degree.
Optionally, the execution block 140 is further configured to decrease the second expansion valve from the second opening degree to the first opening degree when the current adiabatic polytropic exponent is less than the ideal adiabatic polytropic exponent and the second expansion valve is at the second opening degree.
In summary, the noise control method and apparatus, the multi-split air conditioning system and the storage medium provided by the present invention are applied to the multi-split air conditioning system, the multi-split air conditioning system includes a plurality of internal machines, and the noise control method includes: when the multi-split air conditioning system is in heating operation, acquiring operation data of a compressor according to a preset time interval; calculating the current adiabatic polytropic index of the multi-split air conditioning system according to the operation data; detecting the opening degree of a first expansion valve of a temperature-reaching shutdown indoor unit in the plurality of indoor units; when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the first expansion valve is at the first opening degree, the fan of the warm shutdown internal machine is adjusted to be closed from low-wind-gear operation, and the first expansion valve is increased from the first opening degree to the second opening degree. The invention can reduce noise and ensure the heating effect of the multi-split air conditioning system.
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 (10)

1. A noise control method, applied to a multi-split air conditioning system (10), wherein the multi-split air conditioning system (10) comprises a plurality of internal machines (13), and the noise control method comprises:
when the multi-split air conditioning system (10) is in heating operation, acquiring operation data of a compressor according to a preset time interval;
calculating the current adiabatic polytropic exponent of the multi-split air conditioning system (10) according to the operation data;
detecting the opening degree of a first expansion valve of a warm-stop indoor unit among the plurality of indoor units (13);
when the current adiabatic polytropic exponent is greater than or equal to an ideal adiabatic polytropic exponent and the first expansion valve is at a first opening degree, the fan of the warm shutdown indoor unit is adjusted to be closed from low-wind-gear operation, and the first expansion valve is increased to a second opening degree from the first opening degree.
2. The noise control method according to claim 1, further comprising:
when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is in the first opening degree, the fan is kept running at a low wind level and the first expansion valve is kept at the first opening degree.
3. The noise control method of claim 1, wherein the operational data includes a discharge temperature, a suction temperature, a discharge pressure, and a suction pressure;
the step of calculating the current adiabatic polytropic exponent of the multi-split air conditioning system (10) according to the operation data comprises the following steps:
according to the exhaust temperature, the suction temperature, the exhaust pressure and the suction pressure, according to a preset formula:
Figure FDA0002982713860000011
calculating the current adiabatic polytropic exponent, wherein n represents the current adiabatic polytropic exponent, T2 represents the exhaust temperature, T1 represents the intake temperature, P2 represents the exhaust pressure, and P1 represents the intake pressure.
4. The noise control method according to claim 1, further comprising:
when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the first expansion valve is in the second opening degree, the fan is adjusted to low-wind-gear operation from closing, and the first expansion valve is reduced to the first opening degree from the second opening degree.
5. The noise control method according to claim 1, further comprising:
detecting the opening degree of a second expansion valve of a shutdown internal machine in the plurality of internal machines (13);
when the current adiabatic polytropic exponent is greater than or equal to the ideal adiabatic polytropic exponent and the second expansion valve is at a first opening degree, increasing the second expansion valve from the first opening degree to a second opening degree;
and when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the second expansion valve is at a first opening degree, keeping the second expansion valve at the first opening degree.
6. The noise control method according to claim 5, further comprising:
and when the current adiabatic polytropic exponent is smaller than the ideal adiabatic polytropic exponent and the second expansion valve is at the second opening degree, reducing the second expansion valve from the second opening degree to the first opening degree.
7. The noise control method according to claim 1, wherein the predetermined time interval is 2-4 min; the ideal adiabatic polytropic exponent is 1.15-1.4.
8. A noise control device, characterized in that, being applied to a multi-split air conditioning system (10), the multi-split air conditioning system (10) includes a plurality of internal machines (13), the noise control device (100) includes:
the acquisition module (110) is used for acquiring the operation data of the compressor according to a preset time interval when the multi-split air conditioning system (10) is in heating operation;
a calculation module (120) for calculating a current adiabatic polytropic exponent of the multi-split air conditioning system (10) according to the operation data;
the detection module (130) is used for detecting the opening degree of a first expansion valve of the warm shutdown indoor unit in the plurality of indoor units (13);
and the execution module (140) is used for adjusting the fan of the warm shutdown internal machine to be closed from low-wind gear operation and increasing the first expansion valve to a second opening degree from the first opening degree when the current adiabatic polytropic exponent is greater than or equal to an ideal adiabatic polytropic exponent and the first expansion valve is in the first opening degree.
9. A multi-split air conditioning system, characterized in that the multi-split air conditioning system (10) comprises a plurality of internal machines (13);
the multi-split air conditioning system (10) further comprises:
one or more processors (11);
memory (12) for storing one or more programs which, when executed by the one or more processors (11), cause the one or more processors (11) to implement the noise control method according to any one of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor (11), carries out the noise control method according to any one of claims 1-7.
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