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CN110595004B - Air conditioner noise reduction control method and system and air conditioner - Google Patents

Air conditioner noise reduction control method and system and air conditioner Download PDF

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Publication number
CN110595004B
CN110595004B CN201910931261.8A CN201910931261A CN110595004B CN 110595004 B CN110595004 B CN 110595004B CN 201910931261 A CN201910931261 A CN 201910931261A CN 110595004 B CN110595004 B CN 110595004B
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expansion valve
electronic expansion
air conditioner
opening degree
temperature
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CN110595004A (en
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李钰
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Mathematical Physics (AREA)
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Abstract

本发明提供了一种空调降噪控制方法、控制系统及空调器，涉及空调器技术领域，所述空调降噪控制方法包括获取当前温度；根据与空调外机相连接的空调内机数量，选择不同的电子膨胀阀控制方式，并根据当前温度，获得电子膨胀阀的目标开度P目标；根据与空调外机相连接的空调内机数量和处于运行状态的空调内机的数量，获得电子膨胀阀目标开度下限；将电子膨胀阀的目标开度P目标与电子膨胀阀的目标开度下限进行比较，根据比较结果，获得电子膨胀阀的最终开度P最终。与现有技术比较，本发明将制热拖多和拖一的电子膨胀阀控制方式区分开来，并调节电子膨胀阀的目标开度下限，避免因电子膨胀阀开度过小而导致节流噪声产生的现象发生。

Figure 201910931261

The invention provides an air conditioner noise reduction control method, a control system and an air conditioner, and relates to the technical field of air conditioners. The air conditioner noise reduction control method includes acquiring the current temperature; Different electronic expansion valve control methods, and according to the current temperature, obtain the target opening P target of the electronic expansion valve; according to the number of air conditioner indoor units connected to the air conditioner external unit and the number of air conditioner indoor units in operation, obtain the electronic expansion valve Valve target opening degree lower limit; compare the target opening degree P target of the electronic expansion valve with the target opening degree lower limit of the electronic expansion valve, and obtain the final opening degree P final of the electronic expansion valve according to the comparison result. Compared with the prior art, the present invention distinguishes the electronic expansion valve control modes of heating drag-and-drop and drag-one, and adjusts the lower limit of the target opening degree of the electronic expansion valve, so as to avoid throttling caused by the too small opening of the electronic expansion valve. The phenomenon of noise generation occurs.

Figure 201910931261

Description

Air conditioner noise reduction control method and system and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner noise reduction control method, an air conditioner noise reduction control system and an air conditioner.
Background
With the rapid development of air conditioner technology, air conditioners have been increasingly widely used in the places of work and life of people. In the heating operation process of the split air conditioner, the refrigerant in the heat exchanger of the indoor unit is a high-temperature and high-pressure gaseous refrigerant, and needs to be shunted by the liquid shunting head and the liquid shunting pipe before entering the heat exchanger of the outdoor unit, and the shunting process can generate larger noise of refrigerant flowing. Especially, when the air-conditioning heating mode is operated, the commercial external machine drags a plurality of internal machines, and under the condition that the opening adjusting capability of the electronic expansion valves corresponding to the internal machines is weak, the throttling noise of the external machine is large, the using comfort of users is seriously influenced, and the satisfaction degree of the users to the products is reduced.
Disclosure of Invention
The invention solves the problems that in the prior art, electronic expansion valves are controlled in a unified mode usually in a heating mode, the throttling noise is large, and especially, under the condition that one outdoor unit is connected with a plurality of indoor units and the opening adjusting capacity of the electronic expansion valve corresponding to the indoor unit is weak, the throttling noise of the outdoor unit is larger.
In order to solve the above problems, the present invention provides an air conditioner noise reduction control method, including:
acquiring a current temperature;
selecting different electronic expansion valve control modes according to the number of the air conditioner internal units connected with the air conditioner external unit, and obtaining the target opening degree P of the electronic expansion valve according to the current temperatureTarget；
Obtaining a target opening lower limit of the electronic expansion valve according to the number of the air conditioner internal units connected with the air conditioner external unit and the number of the air conditioner internal units which are connected with the air conditioner external unit and are in a running state;
setting the target opening degree P of the electronic expansion valveTargetComparing the target opening degree lower limit of the electronic expansion valve, and obtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processed。
Therefore, the control modes of the electronic expansion valves for heating and dragging are distinguished, and the throttling noise of the outdoor unit is effectively reduced; and the lower limit of the target opening degree of the electronic expansion valve is judged according to the number of the air conditioner internal machines connected with the air conditioner external machine and in a running state, so that the phenomenon of throttling noise generation caused by over-small opening degree of the electronic expansion valve is avoided, and the comfort degree and the satisfaction degree of a user on a product in the using process are improved.
Optionally, the current temperature includes a defrosting pipe temperature TDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionTemperature T of inlet pipe in starting machineTubule nAnd/or inner machine central disc temperature TInner plate n。
Therefore, the specifically detected current temperature is limited, and the target opening degree of the electronic expansion valve is convenient to calculate subsequently.
According to the number of the air conditioner internal units connected with the air conditioner external unit and the current temperature, different electronic expansion valve control modes are selected, and the method comprises the following steps: when the number of the air conditioner internal units is 1, controlling the opening degree of the electronic expansion valve according to the suction superheat SH; and when the number of the air conditioner internal units is more than 1, controlling the opening of the electronic expansion valve according to the startup supercooling degree OL.
Therefore, the control modes of the electronic expansion valves for heating and dragging are distinguished, and the throttling noise of the outdoor unit is effectively reduced.
Optionally, when the number of the air conditioners is 1, controlling the opening degree of the electronic expansion valve according to the suction superheat SH includes: calculating the temperature T of the air intake pipeAir suctionAnd the temperature T of the defrosting pipeDefrosting creamFirst temperature difference SH1 and exhaust pipe temperature TExhaust of gasesAnd the inner machine central disc temperature TInner plate nAnd comparing the first temperature difference SH1 with the second temperature difference SH2, and calculating the target opening P of the electronic expansion valve according to the comparison resultTarget。
This defines the calculation method of the target opening degree of the electronic expansion valve for heating.
Optionally, the target opening degree P of the electronic expansion valve is calculated according to the comparison resultTargetThe method comprises the following steps: if SH1>SH2, then PTarget＝PAt present+ SH2, otherwise, PTarget＝PAt present+ SH1, wherein PTargetIs a target opening degree of the electronic expansion valve, wherein PAt presentThe current opening degree of the electronic expansion valve.
This specifically limits the calculation method of the target opening degree of the electronic expansion valve for the heating operation.
Optionally, when the number of the air conditioners is greater than 1, controlling the opening degree of the electronic expansion valve according to the startup supercooling degree OL, including: judging the temperature T of the defrosting pipeDefrosting creamWhether the temperature is less than the first temperature threshold value or not, if the judgment result is yes, PTarget＝PAt present+ OL 1; if the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether the temperature is not less than the second temperature threshold value or not, if the judgment result is yes, the temperature is judged to be not less than the second temperature threshold value
Figure BDA0002220349580000031
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesIf the temperature is not less than the third temperature threshold value, if the judgment result is yes,then
Figure BDA0002220349580000032
If the judgment result is no, then
Figure BDA0002220349580000033
Wherein, PAt presentThe current opening degree of the electronic expansion valve is n, the number of the air-conditioning indoor units connected with the air-conditioning outdoor unit is n, the second temperature threshold is larger than the third temperature threshold, OL1 is the first startup supercooling degree threshold, OL2 is the second startup supercooling degree threshold, OL3 is the third startup supercooling degree threshold, and OL4 is the fourth startup supercooling degree threshold.
This defines the calculation method of the target opening degree of the electronic expansion valve that heats the hot spot.
In the present invention, the obtaining of the lower limit of the target opening degree of the electronic expansion valve according to the number of the air conditioner internal units connected to the air conditioner external unit and in the operating state includes:
when the number of the air conditioner internal units connected with the air conditioner external unit is 1, the lower limit of the target opening of the electronic expansion valve is a preset lower limit P of the target opening of the electronic expansion valvemin Preset；
When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is 1, the lower limit of the target opening degree of the electronic expansion valve is a first lower limit P of the opening degreemin1When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is more than 1, the lower limit of the target opening degree of the electronic expansion valve is a second lower limit of the opening degree Pmin2。
Thereby, a specific method of determining the lower limit of the target opening degree of the electronic expansion valve is limited.
In the present invention, the target opening degree P of the electronic expansion valve is setTargetComparing the target opening degree lower limit of the electronic expansion valve, and obtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processedThe method comprises the following steps:
determining a target of the electronic expansion valveOpening degree PTargetWhether the opening degree of the electronic expansion valve is smaller than the lower limit of the target opening degree of the electronic expansion valve or not, and if the judgment result is yes, the final opening degree P of the electronic expansion valveFinally, the product is processedThe target opening degree lower limit of the electronic expansion valve is set; if the judgment result is no, the final opening degree P of the electronic expansion valveFinally, the product is processedIs the target opening degree P of the electronic expansion valveTarget。
Therefore, the phenomenon that the opening of the electronic expansion valve is too small to cause throttling noise is avoided.
Compared with the prior art, the air conditioner noise reduction control method has the advantages that the control modes of the electronic expansion valve for controlling the heating driving and the heating driving are distinguished, so that the throttling noise of the outdoor unit is effectively reduced; and the lower limit of the target opening degree of the electronic expansion valve is judged according to the number of the air conditioner internal machines connected with the air conditioner external machine and in a running state, so that the phenomenon of throttling noise generation caused by over-small opening degree of the electronic expansion valve is avoided, and the comfort degree and the satisfaction degree of a user on a product in the using process are improved.
In order to solve the above technical problem, the present invention further provides a noise reduction control system for an air conditioner, comprising:
a detection unit for detecting the current temperature including the defrosting pipe temperature TDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionTemperature T of inlet pipe in starting machineTubule nAnd/or inner machine central disc temperature TInner plate n；
The control unit is used for selecting different electronic expansion valve control modes according to the number of the air conditioner internal units connected with the air conditioner external unit and the current temperature;
a calculation unit for calculating a current opening degree P of the electronic expansion valve according to the detected current temperatureTarget；
The calculation unit is also used for obtaining the lower limit of the target opening degree of the electronic expansion valve according to the number of the air conditioner internal units connected with the air conditioner external unit and the number of the air conditioner internal units which are connected with the air conditioner external unit and are in a running state;
the calculation unit is also used for calculating the target opening degree P of the electronic expansion valveTargetComparing the target opening degree lower limit of the electronic expansion valve, and obtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processed。
Compared with the prior art, the advantages of the air conditioner noise reduction control system and the air conditioner noise reduction control method in the invention are the same, and are not repeated herein.
In order to solve the technical problem, the present invention further provides an air conditioner, which includes a computer readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and when the computer program is executed by the processor, the method for implementing noise reduction control of the air conditioner is implemented.
The advantages of the air conditioner of the invention over the prior art are the same as the advantages of the air conditioner noise reduction control method over the prior art, and are not described herein again.
In order to solve the above technical problem, the present invention further provides a computer-readable storage medium storing a computer program, which is read and executed by a processor to implement the method for controlling noise reduction of an air conditioner.
The advantages of the computer-readable storage medium of the present invention over the prior art are the same as the advantages of the air conditioner noise reduction control method over the prior art, and are not described herein again.
Drawings
FIG. 1 is a flow chart of a noise reduction control method of an air conditioner according to the present invention;
fig. 2 is a system block diagram of a noise reduction control system of an air conditioner according to the present invention.
Detailed Description
In the heating operation process of the split air conditioner, the refrigerant in the heat exchanger of the indoor unit is a high-temperature and high-pressure gaseous refrigerant, and needs to be shunted by the liquid shunting head and the liquid shunting pipe before entering the heat exchanger of the outdoor unit, and the shunting process can generate larger noise of refrigerant flowing. Especially, when the air-conditioning heating mode is operated, the commercial external machine drags a plurality of internal machines, and under the condition that the opening adjusting capability of the electronic expansion valves corresponding to the internal machines is weak, the throttling noise of the external machine is large, the using comfort of users is seriously influenced, and the satisfaction degree of the users to the products is reduced.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it is to be understood that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.
In the description of the present invention, it is to be understood that the description of the term "some specific embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the present invention. Throughout this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1, the noise reduction control method of an air conditioner of the present invention includes:
acquiring a current temperature;
selecting different electronic expansion valve control modes according to the number of the air conditioner internal units connected with the air conditioner external unit, and obtaining the target opening degree P of the electronic expansion valve according to the current temperatureTarget；
Obtaining a target opening lower limit of the electronic expansion valve according to the number of the air conditioner internal units connected with the air conditioner external unit and the number of the air conditioner internal units which are connected with the air conditioner external unit and are in a running state;
setting the target opening degree P of the electronic expansion valveTargetIs compared with the lower limit of the target opening degree of the electronic expansion valveObtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processed。
Therefore, the control modes of the electronic expansion valves for heating and dragging are distinguished, and the throttling noise of the outdoor unit is effectively reduced; and the lower limit of the target opening degree of the electronic expansion valve is judged according to the number of the air conditioner internal machines connected with the air conditioner external machine and in a running state, so that the phenomenon of throttling noise generation caused by over-small opening degree of the electronic expansion valve is avoided, and the comfort degree and the satisfaction degree of a user on a product in the using process are improved.
In the present invention, the current temperature includes the defrosting pipe temperature TDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionTemperature T of inlet pipe in starting machineTubule nInner machine central disc temperature TInner plate nAnd the target opening degree of the electronic expansion valve can be conveniently calculated subsequently. And the current temperature is measured by a temperature sensor arranged at a corresponding position, and the average value of corresponding temperature values measured for a plurality of times is obtained through a control unit, and the average value is converted into the current temperature value taking the centigrade as a unit, wherein the temperature sensor comprises a defrosting pipe temperature sensor, an exhaust pipe temperature sensor, an air suction pipe temperature sensor, an internal inlet pipe temperature sensor and/or an internal inlet pipe temperature sensor.
In some embodiments, the EE transformer parameter can be read by the main chip and the number of the air conditioner indoor units, that is, the number of the air conditioner indoor units connected to the outdoor unit, can be determined by detecting the communication state with the indoor units.
According to the invention, different control modes of the electronic expansion valve are selected according to the number of the air conditioner internal units connected with the air conditioner external unit, and the control modes comprise:
when the number of the air conditioners is 1, the opening degree of the electronic expansion valve is controlled according to the suction superheat SH, and the specific method is that the temperature T of the suction pipe is calculatedAir suctionAnd the temperature T of the defrosting pipeDefrosting creamFirst temperature difference SH1 and exhaust pipe temperature TExhaust of gasesAnd the inner machine central disc temperature TInner plate nAnd comparing the first temperature difference SH1 with the second temperature difference SH2, and calculating the temperature difference according to the comparison resultTarget opening degree of electronic expansion valve, if SH1>SH2, the target opening degree P of the electronic expansion valveTarget＝PAt present+ SH2, otherwise, PTarget＝PAt present+ SH1, the operation is more stable;
when the number of the air conditioner internal units is more than 1, the opening degree of the electronic expansion valve is controlled according to the startup supercooling degree OL,
judging the temperature T of the defrosting pipeDefrosting creamWhether or not it is less than a first temperature threshold,
if the judgment result is yes, PTarget＝PAt present+OL1；
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether it is not less than the second temperature threshold,
if the judgment result is yes, then
Figure BDA0002220349580000071
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether it is not less than the third temperature threshold,
if the judgment result is yes, then
Figure BDA0002220349580000072
If the judgment result is no, then
Figure BDA0002220349580000073
Wherein, PAt presentThe current opening degree of the electronic expansion valve is shown, n is the number of the air-conditioning indoor units connected with the air-conditioning outdoor unit, OL1 is a first starting supercooling degree threshold value, OL2 is a second starting supercooling degree threshold value, OL3 is a third starting supercooling degree threshold value, OL4 is a fourth starting supercooling degree threshold value, and the second temperature threshold value is larger than the third temperature threshold value.
In the invention, the first temperature threshold is generally lower temperature, and when the temperature of the low-temperature liquid passing through the electronic expansion valve is low enough, whether the opening degree of the electronic expansion valve is reasonable can be directly judged, wherein the first temperature threshold is 10-15 ℃ below zeroIn some preferred examples, the first temperature threshold is 15 ℃; the second temperature threshold and the third temperature threshold are generally higher exhaust temperature, when the exhaust temperature is too high, the opening of the electronic expansion valve cannot be reduced too fast, otherwise the throttling noise is larger, the second temperature threshold is 100-Exhaust of gasesThe larger the size，The smaller the refrigerant flow is; therefore, the opening degree of the electronic expansion valve needs to be increased, the refrigerant flow is increased, and the noise is reduced; therefore, OL1 < OL2 < OL3 < OL4, in some preferred examples, OL1 is 1, OL2 is 2, OL3 is 3, and OL4 is 4, and the noise reduction effect is best.
When the number of the air conditioner internal units is 1, the temperature T of the defrosting pipeDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionEqual outdoor machine temperature sensor and indoor machine middle disc temperature TInner plate nThe temperature sensors of the indoor unit are in one-to-one relation, so that the electronic expansion valve scheduling can be directly combined and calculated, and the accuracy is high. However, when the number of the indoor units of the air conditioner is greater than 1, the parameters of the temperature sensors of each indoor unit are mutually influenced, and the indoor units cannot be independently judged according to the environmental conditions of each indoor unit. Therefore, when the number of the indoor units of the air conditioner is more than 1, the defrosting pipe temperature T needs to be adjustedDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionWhen the outdoor unit temperature sensor is independently used as a precondition limiting condition, the indoor unit inlet pipe temperature T is followedTubule nInner machine central disc temperature TInner plate nThe parameters of the temperature sensor of the indoor unit independently control the electronic expansion valve of each indoor unit, so that the adjustment precision is improved, and the noise problem caused by weak adjustment capability of the electronic expansion valve when the indoor unit is dragged too much is reduced. Therefore, the control modes of the electronic expansion valves for heating and heating are distinguished, and the throttling noise of the outdoor unit is effectively reduced.
In the present invention, the determining the lower limit of the target opening of the electronic expansion valve according to the number of the air conditioner internal units connected to the air conditioner external unit and in the operating state includes:
when the air conditioner is connected with an external machine of the air conditionerWhen the number of connected air conditioner internal units is 1, the lower limit of the target opening of the electronic expansion valve is a preset lower limit P of the target opening of the electronic expansion valvemin Preset；
When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is 1, the lower limit of the target opening degree of the electronic expansion valve is a first lower limit P of the opening degreemin1When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is more than 1, the lower limit of the target opening degree of the electronic expansion valve is a second lower limit of the opening degree Pmin2。
In some embodiments, a lower limit P of the target opening degree of the electronic expansion valve is presetmin Preset60-80, the first opening lower limit Pmin1Is 90-95, and the second opening lower limit Pmin2And the opening degree of the electronic expansion valve is 80-90, noise is prevented from being increased due to too small opening degree of the electronic expansion valve, noise can be effectively reduced, and when the number of air conditioners connected with the air conditioner external unit is more than 1, the lower limit of the target opening degree of the electronic expansion valve is larger than that of the air conditioners connected with the air conditioner external unit, the flow rate of a refrigerant is increased, and the noise is reduced. In some preferred examples, a lower limit P of the target opening degree of the electronic expansion valve is presetmin Preset60, the first opening lower limit Pmin1Is 90, the second opening lower limit Pmin2At 80, the noise reduction effect is better.
In the present invention, the target opening degree P of the electronic expansion valve is setTargetComparing the target opening degree lower limit of the electronic expansion valve, and obtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processedThe method comprises the following steps:
judging the target opening degree P of the electronic expansion valveTargetWhether the opening degree of the electronic expansion valve is smaller than the lower limit of the target opening degree of the electronic expansion valve or not, and if the judgment result is yes, the final opening degree P of the electronic expansion valveFinally, the product is processedThe target opening degree lower limit of the electronic expansion valve is set; if the judgment result is no, the final opening degree P of the electronic expansion valveFinally, the product is processedIs the target opening degree P of the electronic expansion valveTargetThe phenomenon that the opening of the electronic expansion valve is too small to cause throttling noise is avoided.
As shown in figures 1 and 2, in the invention, the detection unit is used for detecting the current temperature which comprises the defrosting pipe temperature TDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionTemperature T of inlet pipe in starting machineTubule nInner machine central disc temperature TInner plate nThe detection unit comprises a defrosting pipe temperature sensor, an exhaust pipe temperature sensor, an air suction pipe temperature sensor, an internal inlet pipe temperature sensor and/or an internal inlet pipe middle pipe temperature sensor;
in the invention, the control unit is used for selecting different electronic expansion valve control modes according to the number of the air conditioner internal units connected with the air conditioner external unit and the current temperature;
in the invention, the calculation unit is used for calculating the current opening degree P of the electronic expansion valve according to the detected current temperatureTargetThe method specifically comprises the following steps:
when the number of the air conditioners is 1, the opening degree of the electronic expansion valve is controlled according to the suction superheat SH, and the specific method is that the temperature T of the suction pipe is calculatedAir suctionAnd the temperature T of the defrosting pipeDefrosting creamFirst temperature difference SH1 and exhaust pipe temperature TExhaust of gasesAnd the inner machine central disc temperature TInner plate nAnd comparing the first temperature difference SH1 with the second temperature difference SH2, calculating the target opening degree of the electronic expansion valve according to the comparison result, and if SH1 is detected, calculating the target opening degree of the electronic expansion valve>SH2, the target opening degree P of the electronic expansion valveTarget＝PAt present+ SH2, otherwise, PTarget＝PAt present+SH1；
When the number of the air conditioner internal units is more than 1, controlling the opening degree of the electronic expansion valve according to the startup supercooling degree OL, wherein the specific method comprises the following steps:
judging the temperature T of the defrosting pipeDefrosting creamWhether or not it is less than a first temperature threshold,
if the judgment result is yes, PTarget＝PAt present+OL1；
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether it is not less than the second temperature threshold,
if the judgment result is yes, then
Figure BDA0002220349580000101
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether it is not less than the third temperature threshold,
if the judgment result is yes, then
Figure BDA0002220349580000102
If the judgment result is no, then
Figure BDA0002220349580000103
Therefore, the control modes of heating one air conditioner indoor unit and operating a plurality of air conditioner indoor units are distinguished, and the throttling noise of the outdoor unit is effectively reduced.
In the present invention, the calculating unit is further configured to determine a lower limit of the target opening degree of the electronic expansion valve according to the number of the air conditioner internal units connected to the air conditioner external unit and in an operating state, and specifically includes:
when the number of the air conditioner internal units connected with the air conditioner external unit is 1, the lower limit of the target opening of the electronic expansion valve is a preset lower limit P of the target opening of the electronic expansion valvemin Preset；
When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is 1, the lower limit of the target opening degree of the electronic expansion valve is a first lower limit P of the opening degreemin1When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is more than 1, the lower limit of the target opening degree of the electronic expansion valve is a second lower limit of the opening degree Pmin2。
In the present invention, the calculation unit is further configured to calculate a target opening degree P of the electronic expansion valveTargetComparing the target opening degree lower limit of the electronic expansion valve, and obtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processedThe method comprises the following steps:
judging the electronic expansion valveTarget opening degree PTargetWhether the opening degree of the electronic expansion valve is smaller than the lower limit of the target opening degree of the electronic expansion valve or not, and if the judgment result is yes, the final opening degree P of the electronic expansion valveFinally, the product is processedThe target opening degree lower limit of the electronic expansion valve is set; if the judgment result is no, the final opening degree P of the electronic expansion valveFinally, the product is processedIs the target opening degree P of the electronic expansion valveTargetThe phenomenon that the opening of the electronic expansion valve is too small to cause throttling noise is avoided.
Compared with the prior art, the advantages of the air conditioner noise reduction control system and the air conditioner noise reduction control method in the invention are the same, and are not repeated herein.
The invention relates to an air conditioner, which comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and run by the processor, the noise reduction control method of the air conditioner is realized.
The invention provides a computer readable storage medium, which stores a computer program, and when the computer program is read and run by a processor, the noise reduction control method of an air conditioner is realized.
The invention also provides a specific implementation mode that:
the detection unit acquires the current temperature, wherein the defrosting pipe temperature sensor detects the temperature T of the defrosting pipeDefrosting creamExhaust pipe temperature sensor for detecting exhaust pipe temperature TExhaust of gasesThe air suction pipe temperature sensor detects the air suction pipe temperature TAir suctionThe inner machine inlet pipe temperature sensor detects the inlet pipe temperature T of the inner machine in the starting machineTubule nDetecting inner machine middle disc temperature T by inner machine middle pipe temperature sensorInner plate n；
The control unit selects different electronic expansion valve control modes according to the number of the air conditioner internal units connected with the air conditioner external unit, namely, a main chip reads EE transformer parameters and detects the communication state with the internal units to judge the number of the air conditioner internal units connected with the external unit, and when the number of the air conditioner internal units is 1, the main chip controls the opening degree of the electronic expansion valves according to the suction superheat SH; and when the number of the air conditioner internal units is more than 1, the main chip controls the opening of the electronic expansion valve according to the startup supercooling degree OL.
The calculation unit is an arithmetic unit and calculates the target opening degree P of the electronic expansion valve according to the current temperatureTarget，
When the number of the air conditioner internal units is 1, the calculation unit calculates the temperature T of the air suction pipeAir suctionAnd the temperature T of the defrosting pipeDefrosting creamFirst temperature difference SH1 and exhaust pipe temperature TExhaust of gasesAnd the inner machine central disc temperature TInner plate nAnd comparing the first temperature difference SH1 with the second temperature difference SH2, calculating the target opening degree of the electronic expansion valve according to the comparison result, and if SH1 is detected, calculating the target opening degree of the electronic expansion valve>SH2, the target opening degree P of the electronic expansion valveTarget＝PAt present+ SH2, if not, PTarget＝PAt present+ SH1, at this time due to defrosting tube temperature TDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionEqual outdoor machine temperature sensor and indoor machine middle disc temperature TInner plate nThe temperature sensors of the indoor unit are in one-to-one relation, so that the electronic expansion valve scheduling can be directly combined and calculated, and the accuracy is high. (ii) a
When the number of the indoor units of the air conditioner is more than 1, the parameters of the temperature sensor of each indoor unit are mutually influenced, so that the indoor units cannot be independently judged according to the environmental condition of each indoor unit. Therefore, when the number of the indoor units of the air conditioner is more than 1, the defrosting pipe temperature T needs to be adjustedDefrosting creamExhaust pipe temperature TExhaust of gasesTemperature T of the suction pipeAir suctionWhen the outdoor unit temperature sensor is independently used as a precondition limiting condition, the indoor unit inlet pipe temperature T is followedTubule nInner machine central disc temperature TInner plate nThe parameters of the temperature sensor of the indoor unit independently control the electronic expansion valve of each indoor unit, so that the adjustment precision is improved, and the noise problem caused by weak adjustment capability of the electronic expansion valve when the indoor unit is dragged too much is reduced.
Therefore, the calculation unit judges the defrosting pipe temperature TDefrosting creamWhether or not it is less than a first temperature threshold,
if the judgment result is yes, PTarget＝PAt present+OL1；
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether it is not less than the second temperature threshold,
if the judgment result is yes, then
Figure BDA0002220349580000121
If the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether it is not less than the third temperature threshold,
if the judgment result is yes, then
Figure BDA0002220349580000122
If the judgment result is no, then
Figure BDA0002220349580000131
Wherein, PAt presentThe current opening degree of the electronic expansion valve is determined, n is the number of air conditioner internal units connected with the air conditioner external units, OL1 is 1, OL2 is 2, OL3 is 3, OL4 is 4, the first temperature threshold is 15 ℃, whether the opening degree of the electronic expansion valve is reasonable or not can be directly determined, the second temperature threshold is 100 ℃, and the third temperature threshold is 90 ℃, so that the phenomenon that when the exhaust temperature is too high, the opening degree of the electronic expansion valve is reduced too fast to increase throttling noise is avoided.
In the embodiment, the control modes of the electronic expansion valve for heating and controlling the outdoor unit to be more than one are separated, so that the throttling noise of the outdoor unit is effectively reduced.
In the invention, a calculation unit judges the lower limit of the target opening degree of the electronic expansion valve according to the number of the air conditioner internal units connected with the air conditioner external unit and the number of the air conditioner internal units which are connected with the air conditioner external unit and are in a running state:
when the number of the air conditioner internal units connected with the air conditioner external unit is 1, the calculation unit judges that the lower limit of the target opening of the electronic expansion valve is the lower limit P of the target opening of the preset electronic expansion valvemin Preset；
When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is 1, the calculating unitJudging that the lower limit of the target opening degree of the electronic expansion valve is a first lower limit Pmin1When the number of the air conditioner internal units connected with the air conditioner external unit is more than 1 and the number of the air conditioner internal units in the running state is more than 1, the lower limit of the target opening degree of the electronic expansion valve is a second lower limit of the opening degree Pmin2。
In some specific examples, a lower limit P of the target opening degree of the electronic expansion valve is presetmin Preset60, the first opening lower limit Pmin1Is 90, the second opening lower limit Pmin2And the lower limit of the target opening of the electronic expansion valve is larger than that of the air conditioners connected with the air conditioner external unit by 1 when the number of the air conditioners connected with the air conditioner external unit is more than 1, so that the flow of a refrigerant is increased, and the noise is reduced.
In the invention, the calculating unit calculates the target opening degree P of the electronic expansion valveTargetComparing with the lower limit of the target opening degree of the electronic expansion valve, and obtaining the final opening degree P of the electronic expansion valve according to the comparison resultFinally, the product is processed，：
The calculation unit judges the target opening degree P of the electronic expansion valveTargetWhether the opening degree of the electronic expansion valve is smaller than the lower limit of the target opening degree of the electronic expansion valve or not, if the judgment result is yes, the calculating unit judges the final opening degree P of the electronic expansion valveFinally, the product is processedThe target opening degree lower limit of the electronic expansion valve is set; if the judgment result is no, the calculation unit judges the final opening degree P of the electronic expansion valveFinally, the product is processedIs the target opening degree P of the electronic expansion valveTargetThe phenomenon that the opening of the electronic expansion valve is too small to cause throttling noise is avoided.
Therefore, the control method of the electronic expansion valve for heating and controlling the outdoor unit is divided, so that the throttling noise of the outdoor unit is effectively reduced; and the lower limit of the target opening degree of the electronic expansion valve is judged according to the number of the air conditioner internal machines connected with the air conditioner external machine and in a running state, so that the phenomenon of throttling noise generation caused by over-small opening degree of the electronic expansion valve is avoided, and the comfort degree and the satisfaction degree of a user on a product in the using process are improved.
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)

1.一种空调降噪控制方法，其特征在于，包括：1. an air-conditioning noise reduction control method, is characterized in that, comprises: 获取当前温度；get the current temperature; 根据与空调外机相连接的空调内机数量，选择不同的电子膨胀阀控制方式，并根据所述当前温度，获得所述电子膨胀阀的目标开度P目标；Select different electronic expansion valve control modes according to the number of air conditioner internal units connected to the air conditioner external unit, and obtain the target opening degree P target of the electronic expansion valve according to the current temperature; 根据与所述空调外机相连接的空调内机数量和与所述空调外机相连接且处于运行状态的所述空调内机的数量，获得电子膨胀阀目标开度下限；Obtaining the lower limit of the target opening degree of the electronic expansion valve according to the number of the inner air conditioner units connected to the outer air conditioner unit and the number of the inner air conditioner units connected to the outer air conditioner unit and in a running state; 判断所述电子膨胀阀的目标开度P目标是否小于所述电子膨胀阀的目标开度下限，若判断结果为是，则所述电子膨胀阀的最终开度P最终为所述电子膨胀阀的目标开度下限；若判断结果为否，则所述电子膨胀阀的最终开度P最终为所述电子膨胀阀的目标开度P目标。Determine whether the target opening degree P target of the electronic expansion valve is less than the lower limit of the target opening degree of the electronic expansion valve, if the determination result is yes, then the final opening degree P of the electronic expansion valve is finally the value of the electronic expansion valve. The lower limit of the target opening degree; if the determination result is no, the final opening degree P of the electronic expansion valve is finally the target opening degree Ptarget of the electronic expansion valve. 2.如权利要求1所述的空调降噪控制方法，其特征在于，所述当前温度包括化霜管温度T化霜、排气管温度T排气、吸气管温度T吸气、开机内机入管温度T细管n和/或内机中盘温度T内盘n。2. The air-conditioning noise reduction control method according to claim 1, wherein the current temperature comprises the temperature of the defrost pipe T defrost, the temperature of the exhaust pipe T of exhaust , the temperature of the suction pipe T of inhalation , and the temperature of the inhalation pipe. The machine inlet tube temperature T thin tube n and/or the inner machine middle disk temperature T inner disk n . 3.如权利要求2所述的空调降噪控制方法，其特征在于，根据与空调外机相连接的空调内机数量和所述当前温度，选择不同的电子膨胀阀控制方式，包括：当空调内机数量为1时，按照吸气过热度SH控制所述电子膨胀阀的开度；当空调内机数量大于1时，按照开机过冷度OL控制所述电子膨胀阀的开度。3. The noise reduction control method for an air conditioner according to claim 2, wherein different electronic expansion valve control modes are selected according to the number of air conditioner internal units connected to the air conditioner external unit and the current temperature, including: when the air conditioner is When the number of internal units is 1, the opening degree of the electronic expansion valve is controlled according to the suction superheat degree SH; when the number of internal air conditioners is greater than 1, the opening degree of the electronic expansion valve is controlled according to the start-up subcooling degree OL. 4.如权利要求3所述的空调降噪控制方法，其特征在于，当空调内机数量为1时，按照吸气过热度SH控制所述电子膨胀阀的开度，包括：4. The air conditioner noise reduction control method according to claim 3, wherein when the number of air conditioners is 1, controlling the opening degree of the electronic expansion valve according to the suction superheat degree SH, comprising: 计算所述吸气管温度T吸气与所述化霜管温度T化霜的第一温差SH1和所述排气管温度T排气与所述内机中盘温度T内盘n的第二温差SH2，并比较第一温差SH1与第二温差SH2的大小，根据比较的结果，计算所述电子膨胀阀的目标开度P目标。Calculate the first temperature difference SH1 between the suction pipe temperature T suction and the defrosting pipe temperature T defrost and the second temperature difference between the exhaust pipe temperature T exhaust and the inner panel temperature T inner panel n SH2, and compare the magnitudes of the first temperature difference SH1 and the second temperature difference SH2, and calculate the target opening degree P target of the electronic expansion valve according to the comparison result. 5.如权利要求4所述的空调降噪控制方法，其特征在于，根据比较的结果，计算所述电子膨胀阀的目标开度，包括：若SH1>SH2，则P目标＝P当前+SH2，否则，P目标＝P当前+SH1，其中P当前为所述电子膨胀阀的当前开度。5 . The air-conditioning noise reduction control method according to claim 4 , wherein calculating the target opening degree of the electronic expansion valve according to the comparison result, comprising: if SH1 > SH2 , then P target =P current +SH2 , otherwise, Ptarget = Pcurrent +SH1, where Pcurrent is the current opening of the electronic expansion valve. 6.如权利要求3所述的空调降噪控制方法，其特征在于，当空调内机数量大于1时，按照开机过冷度OL控制所述电子膨胀阀的开度，包括：6. The air conditioner noise reduction control method according to claim 3, wherein when the number of air conditioners is greater than 1, controlling the opening degree of the electronic expansion valve according to the start-up subcooling degree OL, comprising: 判断所述化霜管温度T化霜是否小于第一温度阈值，Judging whether the defrosting tube temperature T is less than the first temperature threshold, 若判断结果为是，则P目标＝P当前+OL1；If the judgment result is yes, then P target = P current + OL1; 若判断结果为否，则判断排气管温度T排气是否不小于第二温度阈值，若判断结果为是，则
Figure FDA0002867285420000021
If the determination result is no, then determine whether the exhaust pipe temperature T exhaust is not less than the second temperature threshold, if the determination result is yes, then
Figure FDA0002867285420000021
 若判断结果为否，则判断排气管温度T排气是否不小于第三温度阈值，If the judgment result is no, then judge whether the exhaust pipe temperature T exhaust is not less than the third temperature threshold, 若判断结果为是，则
Figure FDA0002867285420000022
If the judgment result is yes, then
Figure FDA0002867285420000022
 若判断结果为否，则
Figure FDA0002867285420000023
其中，P当前为所述电子膨胀阀的当前开度，n为与空调外机相连接的空调内机的数量，第二温度阈值大于第三温度阈值，OL1为第一开机过冷度阈值，OL2为第二开机过冷度阈值，OL3为第三开机过冷度阈值，OL4为第四开机过冷度阈值。If the judgment result is no, then
Figure FDA0002867285420000023
Wherein, P is currently the current opening degree of the electronic expansion valve, n is the number of air-conditioning internal units connected to the air-conditioning external unit, the second temperature threshold is greater than the third temperature threshold, and OL1 is the first power-on subcooling degree threshold, OL2 is the second power-on subcooling degree threshold, OL3 is the third power-on subcooling degree threshold, and OL4 is the fourth power-on subcooling degree threshold. 7.如权利要求1所述的空调降噪控制方法，其特征在于，所述根据与所述空调外机相连接的空调内机数量和与所述空调外机相连接且处于运行状态的所述空调内机的数量，获得电子膨胀阀目标开度下限，包括：7 . The air conditioner noise reduction control method according to claim 1 , wherein the method is based on the number of the air conditioner inner units connected to the air conditioner outer unit and all the air conditioner units connected to the air conditioner outer unit and in a running state. 8 . According to the number of air conditioners, the lower limit of the target opening degree of the electronic expansion valve is obtained, including: 当与空调外机相连接的空调内机数量为1时，所述电子膨胀阀目标开度下限为预设电子电子膨胀阀目标开度下限Pmin预设；When the number of the internal air conditioner units connected to the external air conditioner unit is 1, the lower limit of the target opening degree of the electronic expansion valve is preset as a preset lower limit P min of the target opening degree of the electronic electronic expansion valve; 当与空调外机相连接的空调内机数量大于1且处于运行状态的空调内机的数量为1时，所述电子膨胀阀目标开度下限为第一开度下限Pmin1，当与空调外机相连接的空调内机数量大于1且处于运行状态的空调内机的数量大于1时，所述电子膨胀阀目标开度下限为第二开度下限Pmin2。When the number of internal air conditioner units connected to the external air conditioner unit is greater than 1 and the number of internal air conditioner units in the running state is 1, the lower limit of the target opening degree of the electronic expansion valve is the first lower opening degree lower limit P min1 . When the number of internal air conditioner units connected to each other is greater than 1 and the number of indoor units of the air conditioner in the running state is greater than 1, the lower limit of the target opening degree of the electronic expansion valve is the second lower opening degree lower limit P min2 . 8.一种空调器降噪控制系统，其特征在于，包括：8. A noise reduction control system for an air conditioner, comprising: 检测单元，所述检测单元用于检测当前温度，所述当前温度包括化霜管温度T化霜、排气管温度T排气、吸气管温度T吸气、开机内机入管温度T细管n和/或内机中盘温度T内盘n；Detection unit, the detection unit is used to detect the current temperature, and the current temperature includes the temperature of the defrost pipe T defrost , the temperature of the exhaust pipe T exhaust , the temperature of the suction pipe T suction , and the temperature of the inlet pipe of the internal machine when it is turned on. n and/or the temperature of the inner disk of the inner unit T , the inner disk n ; 控制单元，所述控制单元用于根据与空调外机相连接的空调内机数量和所述当前温度，选择不同的电子膨胀阀控制方式；a control unit, the control unit is configured to select different electronic expansion valve control modes according to the number of the air conditioner inner units connected to the air conditioner outer unit and the current temperature; 计算单元，所述计算单元用于计算所述电子膨胀阀的目标开度P目标；a calculation unit, the calculation unit is configured to calculate the target opening degree Ptarget of the electronic expansion valve; 所述计算单元还用于根据与所述空调外机相连接的空调内机数量和与所述空调外机相连接且处于运行状态的所述空调内机的数量，获得电子膨胀阀目标开度下限；The calculation unit is further configured to obtain the target opening degree of the electronic expansion valve according to the number of the air conditioner internal units connected to the air conditioner external unit and the number of the air conditioner internal units connected to the air conditioner external unit and in a running state lower limit; 所述计算单元还用于将所述电子膨胀阀的目标开度P目标与所述电子膨胀阀的目标开度下限进行比较，根据比较结果，获得电子膨胀阀的最终开度P最终，包括：The computing unit is further configured to compare the target opening degree P target of the electronic expansion valve with the lower limit of the target opening degree of the electronic expansion valve, and obtain the final opening degree P final of the electronic expansion valve according to the comparison result, including: 判断所述电子膨胀阀的目标开度P目标是否小于所述电子膨胀阀的目标开度下限，若判断结果为是，则所述电子膨胀阀的最终开度P最终为所述电子膨胀阀的目标开度下限；若判断结果为否，则所述电子膨胀阀的最终开度P最终为所述电子膨胀阀的目标开度P目标。Determine whether the target opening degree P target of the electronic expansion valve is less than the lower limit of the target opening degree of the electronic expansion valve, if the determination result is yes, then the final opening degree P of the electronic expansion valve is finally the value of the electronic expansion valve. The lower limit of the target opening degree; if the determination result is no, the final opening degree P of the electronic expansion valve is finally the target opening degree Ptarget of the electronic expansion valve. 9.一种空调器，其特征在于，包括存储有计算机程序的计算机可读存储介质和处理器，所述计算机程序被所述处理器读取并运行时，实现如权利要求1-8任一项所述的方法。9. An air conditioner, characterized in that it comprises a computer-readable storage medium and a processor stored with a computer program, and when the computer program is read and run by the processor, it can realize any one of claims 1-8. method described in item. 10.一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，所述计算机程序被处理器读取并运行时，实现如权利要求1-8任一项所述的方法。10. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores a computer program, and when the computer program is read and executed by a processor, the computer program can realize any one of claims 1-8. method described.
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