CN110595004A - 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
CN110595004A
CN110595004A CN201910931261.8A CN201910931261A CN110595004A CN 110595004 A CN110595004 A CN 110595004A CN 201910931261 A CN201910931261 A CN 201910931261A CN 110595004 A CN110595004 A CN 110595004A
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China
Prior art keywords
air conditioner
expansion valve
electronic expansion
opening degree
temperature
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CN201910931261.8A
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CN110595004B (en
Inventor
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)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

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, wherein the air conditioner noise reduction control method comprises the steps of obtaining the current temperature; selecting different control modes of the electronic expansion valve 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(ii) a Obtaining a target opening lower limit of the electronic expansion valve according to the number of air conditioner internal units connected with the air conditioner external unit and the number of the air conditioner internal units in a running state; target opening degree P of 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. Compared with the prior art, the invention controls the electronic expansion valve for heating more and moreThe method is distinguished, and the lower limit of the target opening degree of the electronic expansion valve is adjusted, so that the phenomenon that throttling noise is generated due to the fact that the opening degree of the electronic expansion valve is too small is avoided.

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 valueIf the judgment result is no, the temperature T of the exhaust pipe is judgedExhaust of gasesWhether the temperature is not less than the third temperature threshold value or not, if the judgment result is yes, the temperature is judged to be higher than the third temperature threshold valueIf the judgment result is no, thenWherein, 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 electronic expansion valve is used for controlling the expansion of the air conditioner external unitThe lower limit of the target opening degree is the lower limit P of the target opening degree 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 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:
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 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 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.
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 multiple times is obtained through a control unit and is converted into the current temperature value in unit of centigrade, wherein the temperature sensor comprises a defrosting pipeThe temperature sensor, the exhaust pipe temperature sensor, the air suction pipe temperature sensor, the internal machine inlet pipe temperature sensor and/or the internal machine middle 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, 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, 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
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
If the judgment result is no, then
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 a 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 ℃, and in 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 more than 1, the parameters of the temperature sensors of each indoor unit are influenced mutually, so that the indoor units cannot be used for adjusting the temperature of the indoor unitsAnd (4) independently judging according to the environment 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 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 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 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 embodimentsIn the example, the 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 creamAnd a first temperature difference SH1Temperature T of the exhaust pipeExhaust 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
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
If the judgment result is no, then
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 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.
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
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
If the judgment result is no, then
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 unit, OL1 is 1, OL2 is 2, OL3 is 3, OL4 is 4, the first temperature threshold is 15 ℃, and the electronic expansion valve can be directly determinedWhether the opening degree is reasonable or not is avoided, the second temperature threshold value is 100 ℃, the third temperature threshold value is 90 ℃, and 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 unit judges that 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 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 computing unit judges 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, 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 (11)

1. An air conditioner noise reduction control method is characterized by comprising the following steps:
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 with the lower limit of the target opening degree of the electronic expansion valveComparing the obtained opening degree P to obtain the final opening degree P of the electronic expansion valveFinally, the product is processed。
2. The noise reduction control method of an air conditioner according to claim 1, wherein 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。
3. The noise reduction control method of the 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 with the air conditioner external unit and the current temperature, 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.
4. The noise reduction control method of an air conditioner 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 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。
5. The air conditioner noise reduction control method of claim 4, wherein calculating the target opening degree of the electronic expansion valve according to the result of the comparison comprises: if SH1>SH2, then PTarget＝PAt present+ SH2, otherwise, PTarget＝PAt present+ SH1, wherein PAt presentThe current opening degree of the electronic expansion valve.
6. The noise reduction control method of the air conditioner according to claim 3, wherein 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 comprises:
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
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
If the judgment result is no, thenWherein, 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.
7. The method for controlling noise reduction of an air conditioner according to claim 1, wherein 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 with the air conditioner external unit and in an operating state comprises:
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。
8. The noise reduction control method of an air conditioner according to claim 1, wherein 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 valveTarget。
9. An air conditioner noise reduction control system, 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;
calculation sheetA calculation unit for calculating a target opening degree P of the electronic expansion valveTarget；
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。
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method according to any one of claims 1 to 8.
11. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-8.
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